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kernel_samsung_sm7125/drivers/regulator/cpr-regulator.c

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/*
* Copyright (c) 2013-2019, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#define pr_fmt(fmt) "%s: " fmt, __func__
#include <linux/module.h>
#include <linux/cpu.h>
#include <linux/cpu_pm.h>
#include <linux/cpumask.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/bitops.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
#include <linux/interrupt.h>
#include <linux/debugfs.h>
#include <linux/sort.h>
#include <linux/uaccess.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/cpr-regulator.h>
#include <soc/qcom/scm.h>
/* Register Offsets for RB-CPR and Bit Definitions */
/* RBCPR Version Register */
#define REG_RBCPR_VERSION 0
#define RBCPR_VER_2 0x02
/* RBCPR Gate Count and Target Registers */
#define REG_RBCPR_GCNT_TARGET(n) (0x60 + 4 * n)
#define RBCPR_GCNT_TARGET_GCNT_BITS 10
#define RBCPR_GCNT_TARGET_GCNT_SHIFT 12
#define RBCPR_GCNT_TARGET_GCNT_MASK ((1<<RBCPR_GCNT_TARGET_GCNT_BITS)-1)
/* RBCPR Sensor Mask and Bypass Registers */
#define REG_RBCPR_SENSOR_MASK0 0x20
#define RBCPR_SENSOR_MASK0_SENSOR(n) (~BIT(n))
#define REG_RBCPR_SENSOR_BYPASS0 0x30
/* RBCPR Timer Control */
#define REG_RBCPR_TIMER_INTERVAL 0x44
#define REG_RBIF_TIMER_ADJUST 0x4C
#define RBIF_TIMER_ADJ_CONS_UP_BITS 4
#define RBIF_TIMER_ADJ_CONS_UP_MASK ((1<<RBIF_TIMER_ADJ_CONS_UP_BITS)-1)
#define RBIF_TIMER_ADJ_CONS_DOWN_BITS 4
#define RBIF_TIMER_ADJ_CONS_DOWN_MASK ((1<<RBIF_TIMER_ADJ_CONS_DOWN_BITS)-1)
#define RBIF_TIMER_ADJ_CONS_DOWN_SHIFT 4
#define RBIF_TIMER_ADJ_CLAMP_INT_BITS 8
#define RBIF_TIMER_ADJ_CLAMP_INT_MASK ((1<<RBIF_TIMER_ADJ_CLAMP_INT_BITS)-1)
#define RBIF_TIMER_ADJ_CLAMP_INT_SHIFT 8
/* RBCPR Config Register */
#define REG_RBIF_LIMIT 0x48
#define REG_RBCPR_STEP_QUOT 0x80
#define REG_RBIF_SW_VLEVEL 0x94
#define RBIF_LIMIT_CEILING_BITS 6
#define RBIF_LIMIT_CEILING_MASK ((1<<RBIF_LIMIT_CEILING_BITS)-1)
#define RBIF_LIMIT_CEILING_SHIFT 6
#define RBIF_LIMIT_FLOOR_BITS 6
#define RBIF_LIMIT_FLOOR_MASK ((1<<RBIF_LIMIT_FLOOR_BITS)-1)
#define RBIF_LIMIT_CEILING_DEFAULT RBIF_LIMIT_CEILING_MASK
#define RBIF_LIMIT_FLOOR_DEFAULT 0
#define RBIF_SW_VLEVEL_DEFAULT 0x20
#define RBCPR_STEP_QUOT_STEPQUOT_BITS 8
#define RBCPR_STEP_QUOT_STEPQUOT_MASK ((1<<RBCPR_STEP_QUOT_STEPQUOT_BITS)-1)
#define RBCPR_STEP_QUOT_IDLE_CLK_BITS 4
#define RBCPR_STEP_QUOT_IDLE_CLK_MASK ((1<<RBCPR_STEP_QUOT_IDLE_CLK_BITS)-1)
#define RBCPR_STEP_QUOT_IDLE_CLK_SHIFT 8
/* RBCPR Control Register */
#define REG_RBCPR_CTL 0x90
#define RBCPR_CTL_LOOP_EN BIT(0)
#define RBCPR_CTL_TIMER_EN BIT(3)
#define RBCPR_CTL_SW_AUTO_CONT_ACK_EN BIT(5)
#define RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN BIT(6)
#define RBCPR_CTL_COUNT_MODE BIT(10)
#define RBCPR_CTL_UP_THRESHOLD_BITS 4
#define RBCPR_CTL_UP_THRESHOLD_MASK ((1<<RBCPR_CTL_UP_THRESHOLD_BITS)-1)
#define RBCPR_CTL_UP_THRESHOLD_SHIFT 24
#define RBCPR_CTL_DN_THRESHOLD_BITS 4
#define RBCPR_CTL_DN_THRESHOLD_MASK ((1<<RBCPR_CTL_DN_THRESHOLD_BITS)-1)
#define RBCPR_CTL_DN_THRESHOLD_SHIFT 28
/* RBCPR Ack/Nack Response */
#define REG_RBIF_CONT_ACK_CMD 0x98
#define REG_RBIF_CONT_NACK_CMD 0x9C
/* RBCPR Result status Registers */
#define REG_RBCPR_RESULT_0 0xA0
#define REG_RBCPR_RESULT_1 0xA4
#define RBCPR_RESULT_1_SEL_FAST_BITS 3
#define RBCPR_RESULT_1_SEL_FAST(val) (val & \
((1<<RBCPR_RESULT_1_SEL_FAST_BITS) - 1))
#define RBCPR_RESULT0_BUSY_SHIFT 19
#define RBCPR_RESULT0_BUSY_MASK BIT(RBCPR_RESULT0_BUSY_SHIFT)
#define RBCPR_RESULT0_ERROR_LT0_SHIFT 18
#define RBCPR_RESULT0_ERROR_SHIFT 6
#define RBCPR_RESULT0_ERROR_BITS 12
#define RBCPR_RESULT0_ERROR_MASK ((1<<RBCPR_RESULT0_ERROR_BITS)-1)
#define RBCPR_RESULT0_ERROR_STEPS_SHIFT 2
#define RBCPR_RESULT0_ERROR_STEPS_BITS 4
#define RBCPR_RESULT0_ERROR_STEPS_MASK ((1<<RBCPR_RESULT0_ERROR_STEPS_BITS)-1)
#define RBCPR_RESULT0_STEP_UP_SHIFT 1
/* RBCPR Interrupt Control Register */
#define REG_RBIF_IRQ_EN(n) (0x100 + 4 * n)
#define REG_RBIF_IRQ_CLEAR 0x110
#define REG_RBIF_IRQ_STATUS 0x114
#define CPR_INT_DONE BIT(0)
#define CPR_INT_MIN BIT(1)
#define CPR_INT_DOWN BIT(2)
#define CPR_INT_MID BIT(3)
#define CPR_INT_UP BIT(4)
#define CPR_INT_MAX BIT(5)
#define CPR_INT_CLAMP BIT(6)
#define CPR_INT_ALL (CPR_INT_DONE | CPR_INT_MIN | CPR_INT_DOWN | \
CPR_INT_MID | CPR_INT_UP | CPR_INT_MAX | CPR_INT_CLAMP)
#define CPR_INT_DEFAULT (CPR_INT_UP | CPR_INT_DOWN)
#define CPR_NUM_RING_OSC 8
/* RBCPR Debug Resgister */
#define REG_RBCPR_DEBUG1 0x120
#define RBCPR_DEBUG1_QUOT_FAST_BITS 12
#define RBCPR_DEBUG1_QUOT_SLOW_BITS 12
#define RBCPR_DEBUG1_QUOT_SLOW_SHIFT 12
#define RBCPR_DEBUG1_QUOT_FAST(val) (val & \
((1<<RBCPR_DEBUG1_QUOT_FAST_BITS)-1))
#define RBCPR_DEBUG1_QUOT_SLOW(val) ((val>>RBCPR_DEBUG1_QUOT_SLOW_SHIFT) & \
((1<<RBCPR_DEBUG1_QUOT_SLOW_BITS)-1))
/* RBCPR Aging Resgister */
#define REG_RBCPR_HTOL_AGE 0x160
#define RBCPR_HTOL_AGE_PAGE BIT(1)
#define RBCPR_AGE_DATA_STATUS BIT(2)
/* RBCPR Clock Control Register */
#define RBCPR_CLK_SEL_MASK BIT(0)
#define RBCPR_CLK_SEL_19P2_MHZ 0
#define RBCPR_CLK_SEL_AHB_CLK BIT(0)
/* CPR eFuse parameters */
#define CPR_FUSE_TARGET_QUOT_BITS 12
#define CPR_FUSE_TARGET_QUOT_BITS_MASK ((1<<CPR_FUSE_TARGET_QUOT_BITS)-1)
#define CPR_FUSE_RO_SEL_BITS 3
#define CPR_FUSE_RO_SEL_BITS_MASK ((1<<CPR_FUSE_RO_SEL_BITS)-1)
#define CPR_FUSE_MIN_QUOT_DIFF 50
#define BYTES_PER_FUSE_ROW 8
#define SPEED_BIN_NONE UINT_MAX
#define FUSE_REVISION_UNKNOWN (-1)
#define FUSE_MAP_NO_MATCH (-1)
#define FUSE_PARAM_MATCH_ANY 0xFFFFFFFF
#define FLAGS_IGNORE_1ST_IRQ_STATUS BIT(0)
#define FLAGS_SET_MIN_VOLTAGE BIT(1)
#define FLAGS_UPLIFT_QUOT_VOLT BIT(2)
/*
* The number of individual aging measurements to perform which are then
* averaged together in order to determine the final aging adjustment value.
*/
#define CPR_AGING_MEASUREMENT_ITERATIONS 16
/*
* Aging measurements for the aged and unaged ring oscillators take place a few
* microseconds apart. If the vdd-supply voltage fluctuates between the two
* measurements, then the difference between them will be incorrect. The
* difference could end up too high or too low. This constant defines the
* number of lowest and highest measurements to ignore when averaging.
*/
#define CPR_AGING_MEASUREMENT_FILTER 3
#define CPR_REGULATOR_DRIVER_NAME "qcom,cpr-regulator"
/**
* enum vdd_mx_vmin_method - Method to determine vmin for vdd-mx
* %VDD_MX_VMIN_APC: Equal to APC voltage
* %VDD_MX_VMIN_APC_CORNER_CEILING: Equal to PVS corner ceiling voltage
* %VDD_MX_VMIN_APC_SLOW_CORNER_CEILING:
* Equal to slow speed corner ceiling
* %VDD_MX_VMIN_MX_VMAX: Equal to specified vdd-mx-vmax voltage
* %VDD_MX_VMIN_APC_CORNER_MAP: Equal to the APC corner mapped MX
* voltage
*/
enum vdd_mx_vmin_method {
VDD_MX_VMIN_APC,
VDD_MX_VMIN_APC_CORNER_CEILING,
VDD_MX_VMIN_APC_SLOW_CORNER_CEILING,
VDD_MX_VMIN_MX_VMAX,
VDD_MX_VMIN_APC_FUSE_CORNER_MAP,
VDD_MX_VMIN_APC_CORNER_MAP,
};
#define CPR_CORNER_MIN 1
#define CPR_FUSE_CORNER_MIN 1
/*
* This is an arbitrary upper limit which is used in a sanity check in order to
* avoid excessive memory allocation due to bad device tree data.
*/
#define CPR_FUSE_CORNER_LIMIT 100
struct quot_adjust_info {
int speed_bin;
int virtual_corner;
int quot_adjust;
};
struct cpr_quot_scale {
u32 offset;
u32 multiplier;
};
struct cpr_aging_sensor_info {
u32 sensor_id;
int initial_quot_diff;
int current_quot_diff;
};
struct cpr_aging_info {
struct cpr_aging_sensor_info *sensor_info;
int num_aging_sensors;
int aging_corner;
u32 aging_ro_kv;
u32 *aging_derate;
u32 aging_sensor_bypass;
u32 max_aging_margin;
u32 aging_ref_voltage;
u32 cpr_ro_kv[CPR_NUM_RING_OSC];
int *voltage_adjust;
bool cpr_aging_error;
bool cpr_aging_done;
};
static const char * const vdd_apc_name[] = {"vdd-apc-optional-prim",
"vdd-apc-optional-sec",
"vdd-apc"};
enum voltage_change_dir {
NO_CHANGE,
DOWN,
UP,
};
struct cpr_regulator {
struct list_head list;
struct regulator_desc rdesc;
struct regulator_dev *rdev;
bool vreg_enabled;
int corner;
int ceiling_max;
struct dentry *debugfs;
/* eFuse parameters */
phys_addr_t efuse_addr;
void __iomem *efuse_base;
u64 *remapped_row;
u32 remapped_row_base;
int num_remapped_rows;
/* Process voltage parameters */
u32 *pvs_corner_v;
/* Process voltage variables */
u32 pvs_bin;
u32 speed_bin;
u32 pvs_version;
/* APC voltage regulator */
struct regulator *vdd_apc;
/* Dependency parameters */
struct regulator *vdd_mx;
int vdd_mx_vmax;
int vdd_mx_vmin_method;
int vdd_mx_vmin;
int *vdd_mx_corner_map;
struct regulator *rpm_apc_vreg;
int *rpm_apc_corner_map;
/* mem-acc regulator */
struct regulator *mem_acc_vreg;
/* CPR parameters */
u32 num_fuse_corners;
u64 cpr_fuse_bits;
bool cpr_fuse_disable;
bool cpr_fuse_local;
bool cpr_fuse_redundant;
int cpr_fuse_revision;
int cpr_fuse_map_count;
int cpr_fuse_map_match;
int *cpr_fuse_target_quot;
int *cpr_fuse_ro_sel;
int *fuse_quot_offset;
int gcnt;
unsigned int cpr_irq;
void __iomem *rbcpr_base;
phys_addr_t rbcpr_clk_addr;
struct mutex cpr_mutex;
int *cpr_max_ceiling;
int *ceiling_volt;
int *floor_volt;
int *fuse_ceiling_volt;
int *fuse_floor_volt;
int *last_volt;
int *open_loop_volt;
int step_volt;
int *save_ctl;
int *save_irq;
int *vsens_corner_map;
/* vsens status */
bool vsens_enabled;
/* vsens regulators */
struct regulator *vdd_vsens_corner;
struct regulator *vdd_vsens_voltage;
/* Config parameters */
bool enable;
u32 ref_clk_khz;
u32 timer_delay_us;
u32 timer_cons_up;
u32 timer_cons_down;
u32 irq_line;
u32 *step_quotient;
u32 up_threshold;
u32 down_threshold;
u32 idle_clocks;
u32 gcnt_time_us;
u32 clamp_timer_interval;
u32 vdd_apc_step_up_limit;
u32 vdd_apc_step_down_limit;
u32 flags;
int *corner_map;
u32 num_corners;
int *quot_adjust;
int *mem_acc_corner_map;
unsigned int *vdd_mode_map;
int num_adj_cpus;
int *adj_cpus;
cpumask_t cpu_mask;
bool cpr_disabled_in_pc;
struct notifier_block pm_notifier;
bool is_cpr_suspended;
struct cpr_aging_info *aging_info;
struct notifier_block panic_notifier;
};
#define CPR_DEBUG_MASK_IRQ BIT(0)
#define CPR_DEBUG_MASK_API BIT(1)
static int cpr_debug_enable;
#if defined(CONFIG_DEBUG_FS)
static struct dentry *cpr_debugfs_base;
#endif
static DEFINE_MUTEX(cpr_regulator_list_mutex);
static LIST_HEAD(cpr_regulator_list);
module_param_named(debug_enable, cpr_debug_enable, int, 0644);
#define cpr_debug(cpr_vreg, message, ...) \
do { \
if (cpr_debug_enable & CPR_DEBUG_MASK_API) \
pr_info("%s: " message, (cpr_vreg)->rdesc.name, \
##__VA_ARGS__); \
} while (0)
#define cpr_debug_irq(cpr_vreg, message, ...) \
do { \
if (cpr_debug_enable & CPR_DEBUG_MASK_IRQ) \
pr_info("%s: " message, (cpr_vreg)->rdesc.name, \
##__VA_ARGS__); \
else \
pr_debug("%s: " message, (cpr_vreg)->rdesc.name, \
##__VA_ARGS__); \
} while (0)
#define cpr_info(cpr_vreg, message, ...) \
pr_info("%s: " message, (cpr_vreg)->rdesc.name, ##__VA_ARGS__)
#define cpr_err(cpr_vreg, message, ...) \
pr_err("%s: " message, (cpr_vreg)->rdesc.name, ##__VA_ARGS__)
static u64 cpr_read_remapped_efuse_row(struct cpr_regulator *cpr_vreg,
u32 row_num)
{
if (row_num - cpr_vreg->remapped_row_base
>= cpr_vreg->num_remapped_rows) {
cpr_err(cpr_vreg, "invalid row=%u, max remapped row=%u\n",
row_num, cpr_vreg->remapped_row_base
+ cpr_vreg->num_remapped_rows - 1);
return 0;
}
return cpr_vreg->remapped_row[row_num - cpr_vreg->remapped_row_base];
}
static u64 cpr_read_efuse_row(struct cpr_regulator *cpr_vreg, u32 row_num,
bool use_tz_api)
{
int rc;
u64 efuse_bits;
struct scm_desc desc = {0};
struct cpr_read_req {
u32 row_address;
int addr_type;
} req;
struct cpr_read_rsp {
u32 row_data[2];
u32 status;
} rsp;
if (cpr_vreg->remapped_row && row_num >= cpr_vreg->remapped_row_base)
return cpr_read_remapped_efuse_row(cpr_vreg, row_num);
if (!use_tz_api) {
efuse_bits = readq_relaxed(cpr_vreg->efuse_base
+ row_num * BYTES_PER_FUSE_ROW);
return efuse_bits;
}
desc.args[0] = req.row_address = cpr_vreg->efuse_addr +
row_num * BYTES_PER_FUSE_ROW;
desc.args[1] = req.addr_type = 0;
desc.arginfo = SCM_ARGS(2);
efuse_bits = 0;
if (!is_scm_armv8()) {
rc = scm_call(SCM_SVC_FUSE, SCM_FUSE_READ,
&req, sizeof(req), &rsp, sizeof(rsp));
} else {
rc = scm_call2(SCM_SIP_FNID(SCM_SVC_FUSE, SCM_FUSE_READ),
&desc);
rsp.row_data[0] = desc.ret[0];
rsp.row_data[1] = desc.ret[1];
rsp.status = desc.ret[2];
}
if (rc) {
cpr_err(cpr_vreg, "read row %d failed, err code = %d",
row_num, rc);
} else {
efuse_bits = ((u64)(rsp.row_data[1]) << 32) +
(u64)rsp.row_data[0];
}
return efuse_bits;
}
/**
* cpr_read_efuse_param() - read a parameter from one or two eFuse rows
* @cpr_vreg: Pointer to cpr_regulator struct for this regulator.
* @row_start: Fuse row number to start reading from.
* @bit_start: The LSB of the parameter to read from the fuse.
* @bit_len: The length of the parameter in bits.
* @use_tz_api: Flag to indicate if an SCM call should be used to read the fuse.
*
* This function reads a parameter of specified offset and bit size out of one
* or two consecutive eFuse rows. This allows for the reading of parameters
* that happen to be split between two eFuse rows.
*
* Returns the fuse parameter on success or 0 on failure.
*/
static u64 cpr_read_efuse_param(struct cpr_regulator *cpr_vreg, int row_start,
int bit_start, int bit_len, bool use_tz_api)
{
u64 fuse[2];
u64 param = 0;
int bits_first, bits_second;
if (bit_start < 0) {
cpr_err(cpr_vreg, "Invalid LSB = %d specified\n", bit_start);
return 0;
}
if (bit_len < 0 || bit_len > 64) {
cpr_err(cpr_vreg, "Invalid bit length = %d specified\n",
bit_len);
return 0;
}
/* Allow bit indexing to start beyond the end of the start row. */
if (bit_start >= 64) {
row_start += bit_start >> 6; /* equivalent to bit_start / 64 */
bit_start &= 0x3F;
}
fuse[0] = cpr_read_efuse_row(cpr_vreg, row_start, use_tz_api);
if (bit_start == 0 && bit_len == 64) {
param = fuse[0];
} else if (bit_start + bit_len <= 64) {
param = (fuse[0] >> bit_start) & ((1ULL << bit_len) - 1);
} else {
fuse[1] = cpr_read_efuse_row(cpr_vreg, row_start + 1,
use_tz_api);
bits_first = 64 - bit_start;
bits_second = bit_len - bits_first;
param = (fuse[0] >> bit_start) & ((1ULL << bits_first) - 1);
param |= (fuse[1] & ((1ULL << bits_second) - 1)) << bits_first;
}
return param;
}
static bool cpr_is_allowed(struct cpr_regulator *cpr_vreg)
{
if (cpr_vreg->cpr_fuse_disable || !cpr_vreg->enable)
return false;
else
return true;
}
static void cpr_write(struct cpr_regulator *cpr_vreg, u32 offset, u32 value)
{
writel_relaxed(value, cpr_vreg->rbcpr_base + offset);
}
static u32 cpr_read(struct cpr_regulator *cpr_vreg, u32 offset)
{
return readl_relaxed(cpr_vreg->rbcpr_base + offset);
}
static void cpr_masked_write(struct cpr_regulator *cpr_vreg, u32 offset,
u32 mask, u32 value)
{
u32 reg_val;
reg_val = readl_relaxed(cpr_vreg->rbcpr_base + offset);
reg_val &= ~mask;
reg_val |= value & mask;
writel_relaxed(reg_val, cpr_vreg->rbcpr_base + offset);
}
static void cpr_irq_clr(struct cpr_regulator *cpr_vreg)
{
cpr_write(cpr_vreg, REG_RBIF_IRQ_CLEAR, CPR_INT_ALL);
}
static void cpr_irq_clr_nack(struct cpr_regulator *cpr_vreg)
{
cpr_irq_clr(cpr_vreg);
cpr_write(cpr_vreg, REG_RBIF_CONT_NACK_CMD, 1);
}
static void cpr_irq_clr_ack(struct cpr_regulator *cpr_vreg)
{
cpr_irq_clr(cpr_vreg);
cpr_write(cpr_vreg, REG_RBIF_CONT_ACK_CMD, 1);
}
static void cpr_irq_set(struct cpr_regulator *cpr_vreg, u32 int_bits)
{
cpr_write(cpr_vreg, REG_RBIF_IRQ_EN(cpr_vreg->irq_line), int_bits);
}
static void cpr_ctl_modify(struct cpr_regulator *cpr_vreg, u32 mask, u32 value)
{
cpr_masked_write(cpr_vreg, REG_RBCPR_CTL, mask, value);
}
static void cpr_ctl_enable(struct cpr_regulator *cpr_vreg, int corner)
{
u32 val;
if (cpr_vreg->is_cpr_suspended)
return;
/* Program Consecutive Up & Down */
val = ((cpr_vreg->timer_cons_down & RBIF_TIMER_ADJ_CONS_DOWN_MASK)
<< RBIF_TIMER_ADJ_CONS_DOWN_SHIFT) |
(cpr_vreg->timer_cons_up & RBIF_TIMER_ADJ_CONS_UP_MASK);
cpr_masked_write(cpr_vreg, REG_RBIF_TIMER_ADJUST,
RBIF_TIMER_ADJ_CONS_UP_MASK |
RBIF_TIMER_ADJ_CONS_DOWN_MASK, val);
cpr_masked_write(cpr_vreg, REG_RBCPR_CTL,
RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN |
RBCPR_CTL_SW_AUTO_CONT_ACK_EN,
cpr_vreg->save_ctl[corner]);
cpr_irq_set(cpr_vreg, cpr_vreg->save_irq[corner]);
if (cpr_is_allowed(cpr_vreg) && cpr_vreg->vreg_enabled &&
(cpr_vreg->ceiling_volt[corner] >
cpr_vreg->floor_volt[corner]))
val = RBCPR_CTL_LOOP_EN;
else
val = 0;
cpr_ctl_modify(cpr_vreg, RBCPR_CTL_LOOP_EN, val);
}
static void cpr_ctl_disable(struct cpr_regulator *cpr_vreg)
{
if (cpr_vreg->is_cpr_suspended)
return;
cpr_irq_set(cpr_vreg, 0);
cpr_ctl_modify(cpr_vreg, RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN |
RBCPR_CTL_SW_AUTO_CONT_ACK_EN, 0);
cpr_masked_write(cpr_vreg, REG_RBIF_TIMER_ADJUST,
RBIF_TIMER_ADJ_CONS_UP_MASK |
RBIF_TIMER_ADJ_CONS_DOWN_MASK, 0);
cpr_irq_clr(cpr_vreg);
cpr_write(cpr_vreg, REG_RBIF_CONT_ACK_CMD, 1);
cpr_write(cpr_vreg, REG_RBIF_CONT_NACK_CMD, 1);
cpr_ctl_modify(cpr_vreg, RBCPR_CTL_LOOP_EN, 0);
}
static bool cpr_ctl_is_enabled(struct cpr_regulator *cpr_vreg)
{
u32 reg_val;
reg_val = cpr_read(cpr_vreg, REG_RBCPR_CTL);
return reg_val & RBCPR_CTL_LOOP_EN;
}
static bool cpr_ctl_is_busy(struct cpr_regulator *cpr_vreg)
{
u32 reg_val;
reg_val = cpr_read(cpr_vreg, REG_RBCPR_RESULT_0);
return reg_val & RBCPR_RESULT0_BUSY_MASK;
}
static void cpr_corner_save(struct cpr_regulator *cpr_vreg, int corner)
{
cpr_vreg->save_ctl[corner] = cpr_read(cpr_vreg, REG_RBCPR_CTL);
cpr_vreg->save_irq[corner] =
cpr_read(cpr_vreg, REG_RBIF_IRQ_EN(cpr_vreg->irq_line));
}
static void cpr_corner_restore(struct cpr_regulator *cpr_vreg, int corner)
{
u32 gcnt, ctl, irq, ro_sel, step_quot;
int fuse_corner = cpr_vreg->corner_map[corner];
int i;
ro_sel = cpr_vreg->cpr_fuse_ro_sel[fuse_corner];
gcnt = cpr_vreg->gcnt | (cpr_vreg->cpr_fuse_target_quot[fuse_corner] -
cpr_vreg->quot_adjust[corner]);
/* Program the step quotient and idle clocks */
step_quot = ((cpr_vreg->idle_clocks & RBCPR_STEP_QUOT_IDLE_CLK_MASK)
<< RBCPR_STEP_QUOT_IDLE_CLK_SHIFT) |
(cpr_vreg->step_quotient[fuse_corner]
& RBCPR_STEP_QUOT_STEPQUOT_MASK);
cpr_write(cpr_vreg, REG_RBCPR_STEP_QUOT, step_quot);
/* Clear the target quotient value and gate count of all ROs */
for (i = 0; i < CPR_NUM_RING_OSC; i++)
cpr_write(cpr_vreg, REG_RBCPR_GCNT_TARGET(i), 0);
cpr_write(cpr_vreg, REG_RBCPR_GCNT_TARGET(ro_sel), gcnt);
ctl = cpr_vreg->save_ctl[corner];
cpr_write(cpr_vreg, REG_RBCPR_CTL, ctl);
irq = cpr_vreg->save_irq[corner];
cpr_irq_set(cpr_vreg, irq);
cpr_debug(cpr_vreg, "gcnt = 0x%08x, ctl = 0x%08x, irq = 0x%08x\n",
gcnt, ctl, irq);
}
static void cpr_corner_switch(struct cpr_regulator *cpr_vreg, int corner)
{
if (cpr_vreg->corner == corner)
return;
cpr_corner_restore(cpr_vreg, corner);
}
static int cpr_apc_set(struct cpr_regulator *cpr_vreg, u32 new_volt)
{
int max_volt, rc;
max_volt = cpr_vreg->ceiling_max;
rc = regulator_set_voltage(cpr_vreg->vdd_apc, new_volt, max_volt);
if (rc)
cpr_err(cpr_vreg, "set: vdd_apc = %d uV: rc=%d\n",
new_volt, rc);
return rc;
}
static int cpr_mx_get(struct cpr_regulator *cpr_vreg, int corner, int apc_volt)
{
int vdd_mx;
int fuse_corner = cpr_vreg->corner_map[corner];
int highest_fuse_corner = cpr_vreg->num_fuse_corners;
switch (cpr_vreg->vdd_mx_vmin_method) {
case VDD_MX_VMIN_APC:
vdd_mx = apc_volt;
break;
case VDD_MX_VMIN_APC_CORNER_CEILING:
vdd_mx = cpr_vreg->fuse_ceiling_volt[fuse_corner];
break;
case VDD_MX_VMIN_APC_SLOW_CORNER_CEILING:
vdd_mx = cpr_vreg->fuse_ceiling_volt[highest_fuse_corner];
break;
case VDD_MX_VMIN_MX_VMAX:
vdd_mx = cpr_vreg->vdd_mx_vmax;
break;
case VDD_MX_VMIN_APC_FUSE_CORNER_MAP:
vdd_mx = cpr_vreg->vdd_mx_corner_map[fuse_corner];
break;
case VDD_MX_VMIN_APC_CORNER_MAP:
vdd_mx = cpr_vreg->vdd_mx_corner_map[corner];
break;
default:
vdd_mx = 0;
break;
}
return vdd_mx;
}
static int cpr_mx_set(struct cpr_regulator *cpr_vreg, int corner,
int vdd_mx_vmin)
{
int rc;
int fuse_corner = cpr_vreg->corner_map[corner];
rc = regulator_set_voltage(cpr_vreg->vdd_mx, vdd_mx_vmin,
cpr_vreg->vdd_mx_vmax);
cpr_debug(cpr_vreg, "[corner:%d, fuse_corner:%d] %d uV\n", corner,
fuse_corner, vdd_mx_vmin);
if (!rc) {
cpr_vreg->vdd_mx_vmin = vdd_mx_vmin;
} else {
cpr_err(cpr_vreg, "set: vdd_mx [corner:%d, fuse_corner:%d] = %d uV failed: rc=%d\n",
corner, fuse_corner, vdd_mx_vmin, rc);
}
return rc;
}
static int cpr_scale_voltage(struct cpr_regulator *cpr_vreg, int corner,
int new_apc_volt, enum voltage_change_dir dir)
{
int rc = 0, vdd_mx_vmin = 0;
int mem_acc_corner = cpr_vreg->mem_acc_corner_map[corner];
int fuse_corner = cpr_vreg->corner_map[corner];
int apc_corner, vsens_corner;
/* Determine the vdd_mx voltage */
if (dir != NO_CHANGE && cpr_vreg->vdd_mx != NULL)
vdd_mx_vmin = cpr_mx_get(cpr_vreg, corner, new_apc_volt);
if (cpr_vreg->vdd_vsens_voltage && cpr_vreg->vsens_enabled) {
rc = regulator_disable(cpr_vreg->vdd_vsens_voltage);
if (!rc)
cpr_vreg->vsens_enabled = false;
}
if (dir == DOWN) {
if (!rc && cpr_vreg->mem_acc_vreg)
rc = regulator_set_voltage(cpr_vreg->mem_acc_vreg,
mem_acc_corner, mem_acc_corner);
if (!rc && cpr_vreg->rpm_apc_vreg) {
apc_corner = cpr_vreg->rpm_apc_corner_map[corner];
rc = regulator_set_voltage(cpr_vreg->rpm_apc_vreg,
apc_corner, apc_corner);
if (rc)
cpr_err(cpr_vreg, "apc_corner voting failed rc=%d\n",
rc);
}
}
if (!rc && vdd_mx_vmin && dir == UP) {
if (vdd_mx_vmin != cpr_vreg->vdd_mx_vmin)
rc = cpr_mx_set(cpr_vreg, corner, vdd_mx_vmin);
}
if (!rc)
rc = cpr_apc_set(cpr_vreg, new_apc_volt);
if (dir == UP) {
if (!rc && cpr_vreg->mem_acc_vreg)
rc = regulator_set_voltage(cpr_vreg->mem_acc_vreg,
mem_acc_corner, mem_acc_corner);
if (!rc && cpr_vreg->rpm_apc_vreg) {
apc_corner = cpr_vreg->rpm_apc_corner_map[corner];
rc = regulator_set_voltage(cpr_vreg->rpm_apc_vreg,
apc_corner, apc_corner);
if (rc)
cpr_err(cpr_vreg, "apc_corner voting failed rc=%d\n",
rc);
}
}
if (!rc && vdd_mx_vmin && dir == DOWN) {
if (vdd_mx_vmin != cpr_vreg->vdd_mx_vmin)
rc = cpr_mx_set(cpr_vreg, corner, vdd_mx_vmin);
}
if (!rc && cpr_vreg->vdd_vsens_corner) {
vsens_corner = cpr_vreg->vsens_corner_map[fuse_corner];
rc = regulator_set_voltage(cpr_vreg->vdd_vsens_corner,
vsens_corner, vsens_corner);
}
if (!rc && cpr_vreg->vdd_vsens_voltage) {
rc = regulator_set_voltage(cpr_vreg->vdd_vsens_voltage,
cpr_vreg->floor_volt[corner],
cpr_vreg->ceiling_volt[corner]);
if (!rc && !cpr_vreg->vsens_enabled) {
rc = regulator_enable(cpr_vreg->vdd_vsens_voltage);
if (!rc)
cpr_vreg->vsens_enabled = true;
}
}
return rc;
}
static void cpr_scale(struct cpr_regulator *cpr_vreg,
enum voltage_change_dir dir)
{
u32 reg_val, error_steps, reg_mask;
int last_volt, new_volt, corner, fuse_corner;
u32 gcnt, quot;
corner = cpr_vreg->corner;
fuse_corner = cpr_vreg->corner_map[corner];
reg_val = cpr_read(cpr_vreg, REG_RBCPR_RESULT_0);
error_steps = (reg_val >> RBCPR_RESULT0_ERROR_STEPS_SHIFT)
& RBCPR_RESULT0_ERROR_STEPS_MASK;
last_volt = cpr_vreg->last_volt[corner];
cpr_debug_irq(cpr_vreg,
"last_volt[corner:%d, fuse_corner:%d] = %d uV\n",
corner, fuse_corner, last_volt);
gcnt = cpr_read(cpr_vreg, REG_RBCPR_GCNT_TARGET
(cpr_vreg->cpr_fuse_ro_sel[fuse_corner]));
quot = gcnt & ((1 << RBCPR_GCNT_TARGET_GCNT_SHIFT) - 1);
if (dir == UP) {
if (cpr_vreg->clamp_timer_interval
&& error_steps < cpr_vreg->up_threshold) {
/*
* Handle the case where another measurement started
* after the interrupt was triggered due to a core
* exiting from power collapse.
*/
error_steps = max(cpr_vreg->up_threshold,
cpr_vreg->vdd_apc_step_up_limit);
}
cpr_debug_irq(cpr_vreg,
"Up: cpr status = 0x%08x (error_steps=%d)\n",
reg_val, error_steps);
if (last_volt >= cpr_vreg->ceiling_volt[corner]) {
cpr_debug_irq(cpr_vreg,
"[corn:%d, fuse_corn:%d] @ ceiling: %d >= %d: NACK\n",
corner, fuse_corner, last_volt,
cpr_vreg->ceiling_volt[corner]);
cpr_irq_clr_nack(cpr_vreg);
cpr_debug_irq(cpr_vreg, "gcnt = 0x%08x (quot = %d)\n",
gcnt, quot);
/* Maximize the UP threshold */
reg_mask = RBCPR_CTL_UP_THRESHOLD_MASK <<
RBCPR_CTL_UP_THRESHOLD_SHIFT;
reg_val = reg_mask;
cpr_ctl_modify(cpr_vreg, reg_mask, reg_val);
/* Disable UP interrupt */
cpr_irq_set(cpr_vreg, CPR_INT_DEFAULT & ~CPR_INT_UP);
return;
}
if (error_steps > cpr_vreg->vdd_apc_step_up_limit) {
cpr_debug_irq(cpr_vreg,
"%d is over up-limit(%d): Clamp\n",
error_steps,
cpr_vreg->vdd_apc_step_up_limit);
error_steps = cpr_vreg->vdd_apc_step_up_limit;
}
/* Calculate new voltage */
new_volt = last_volt + (error_steps * cpr_vreg->step_volt);
if (new_volt > cpr_vreg->ceiling_volt[corner]) {
cpr_debug_irq(cpr_vreg,
"new_volt(%d) >= ceiling(%d): Clamp\n",
new_volt,
cpr_vreg->ceiling_volt[corner]);
new_volt = cpr_vreg->ceiling_volt[corner];
}
if (cpr_scale_voltage(cpr_vreg, corner, new_volt, dir)) {
cpr_irq_clr_nack(cpr_vreg);
return;
}
cpr_vreg->last_volt[corner] = new_volt;
/* Disable auto nack down */
reg_mask = RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN;
reg_val = 0;
cpr_ctl_modify(cpr_vreg, reg_mask, reg_val);
/* Re-enable default interrupts */
cpr_irq_set(cpr_vreg, CPR_INT_DEFAULT);
/* Ack */
cpr_irq_clr_ack(cpr_vreg);
cpr_debug_irq(cpr_vreg,
"UP: -> new_volt[corner:%d, fuse_corner:%d] = %d uV\n",
corner, fuse_corner, new_volt);
} else if (dir == DOWN) {
if (cpr_vreg->clamp_timer_interval
&& error_steps < cpr_vreg->down_threshold) {
/*
* Handle the case where another measurement started
* after the interrupt was triggered due to a core
* exiting from power collapse.
*/
error_steps = max(cpr_vreg->down_threshold,
cpr_vreg->vdd_apc_step_down_limit);
}
cpr_debug_irq(cpr_vreg,
"Down: cpr status = 0x%08x (error_steps=%d)\n",
reg_val, error_steps);
if (last_volt <= cpr_vreg->floor_volt[corner]) {
cpr_debug_irq(cpr_vreg,
"[corn:%d, fuse_corner:%d] @ floor: %d <= %d: NACK\n",
corner, fuse_corner, last_volt,
cpr_vreg->floor_volt[corner]);
cpr_irq_clr_nack(cpr_vreg);
cpr_debug_irq(cpr_vreg, "gcnt = 0x%08x (quot = %d)\n",
gcnt, quot);
/* Enable auto nack down */
reg_mask = RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN;
reg_val = RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN;
cpr_ctl_modify(cpr_vreg, reg_mask, reg_val);
/* Disable DOWN interrupt */
cpr_irq_set(cpr_vreg, CPR_INT_DEFAULT & ~CPR_INT_DOWN);
return;
}
if (error_steps > cpr_vreg->vdd_apc_step_down_limit) {
cpr_debug_irq(cpr_vreg,
"%d is over down-limit(%d): Clamp\n",
error_steps,
cpr_vreg->vdd_apc_step_down_limit);
error_steps = cpr_vreg->vdd_apc_step_down_limit;
}
/* Calculte new voltage */
new_volt = last_volt - (error_steps * cpr_vreg->step_volt);
if (new_volt < cpr_vreg->floor_volt[corner]) {
cpr_debug_irq(cpr_vreg,
"new_volt(%d) < floor(%d): Clamp\n",
new_volt,
cpr_vreg->floor_volt[corner]);
new_volt = cpr_vreg->floor_volt[corner];
}
if (cpr_scale_voltage(cpr_vreg, corner, new_volt, dir)) {
cpr_irq_clr_nack(cpr_vreg);
return;
}
cpr_vreg->last_volt[corner] = new_volt;
/* Restore default threshold for UP */
reg_mask = RBCPR_CTL_UP_THRESHOLD_MASK <<
RBCPR_CTL_UP_THRESHOLD_SHIFT;
reg_val = cpr_vreg->up_threshold <<
RBCPR_CTL_UP_THRESHOLD_SHIFT;
cpr_ctl_modify(cpr_vreg, reg_mask, reg_val);
/* Re-enable default interrupts */
cpr_irq_set(cpr_vreg, CPR_INT_DEFAULT);
/* Ack */
cpr_irq_clr_ack(cpr_vreg);
cpr_debug_irq(cpr_vreg,
"DOWN: -> new_volt[corner:%d, fuse_corner:%d] = %d uV\n",
corner, fuse_corner, new_volt);
}
}
static irqreturn_t cpr_irq_handler(int irq, void *dev)
{
struct cpr_regulator *cpr_vreg = dev;
u32 reg_val;
mutex_lock(&cpr_vreg->cpr_mutex);
reg_val = cpr_read(cpr_vreg, REG_RBIF_IRQ_STATUS);
if (cpr_vreg->flags & FLAGS_IGNORE_1ST_IRQ_STATUS)
reg_val = cpr_read(cpr_vreg, REG_RBIF_IRQ_STATUS);
cpr_debug_irq(cpr_vreg, "IRQ_STATUS = 0x%02X\n", reg_val);
if (!cpr_ctl_is_enabled(cpr_vreg)) {
cpr_debug_irq(cpr_vreg, "CPR is disabled\n");
goto _exit;
} else if (cpr_ctl_is_busy(cpr_vreg)
&& !cpr_vreg->clamp_timer_interval) {
cpr_debug_irq(cpr_vreg, "CPR measurement is not ready\n");
goto _exit;
} else if (!cpr_is_allowed(cpr_vreg)) {
reg_val = cpr_read(cpr_vreg, REG_RBCPR_CTL);
cpr_err(cpr_vreg, "Interrupt broken? RBCPR_CTL = 0x%02X\n",
reg_val);
goto _exit;
}
/* Following sequence of handling is as per each IRQ's priority */
if (reg_val & CPR_INT_UP) {
cpr_scale(cpr_vreg, UP);
} else if (reg_val & CPR_INT_DOWN) {
cpr_scale(cpr_vreg, DOWN);
} else if (reg_val & CPR_INT_MIN) {
cpr_irq_clr_nack(cpr_vreg);
} else if (reg_val & CPR_INT_MAX) {
cpr_irq_clr_nack(cpr_vreg);
} else if (reg_val & CPR_INT_MID) {
/* RBCPR_CTL_SW_AUTO_CONT_ACK_EN is enabled */
cpr_debug_irq(cpr_vreg, "IRQ occurred for Mid Flag\n");
} else {
cpr_debug_irq(cpr_vreg,
"IRQ occurred for unknown flag (0x%08x)\n", reg_val);
}
/* Save register values for the corner */
cpr_corner_save(cpr_vreg, cpr_vreg->corner);
_exit:
mutex_unlock(&cpr_vreg->cpr_mutex);
return IRQ_HANDLED;
}
/**
* cmp_int() - int comparison function to be passed into the sort() function
* which leads to ascending sorting
* @a: First int value
* @b: Second int value
*
* Return: >0 if a > b, 0 if a == b, <0 if a < b
*/
static int cmp_int(const void *a, const void *b)
{
return *(int *)a - *(int *)b;
}
static int cpr_get_aging_quot_delta(struct cpr_regulator *cpr_vreg,
struct cpr_aging_sensor_info *aging_sensor_info)
{
int quot_min, quot_max, is_aging_measurement, aging_measurement_count;
int quot_min_scaled, quot_max_scaled, quot_delta_scaled_sum;
int retries, rc = 0, sel_fast = 0, i, quot_delta_scaled;
u32 val, gcnt_ref, gcnt;
int *quot_delta_results, filtered_count;
quot_delta_results = kcalloc(CPR_AGING_MEASUREMENT_ITERATIONS,
sizeof(*quot_delta_results), GFP_ATOMIC);
if (!quot_delta_results)
return -ENOMEM;
/* Clear the target quotient value and gate count of all ROs */
for (i = 0; i < CPR_NUM_RING_OSC; i++)
cpr_write(cpr_vreg, REG_RBCPR_GCNT_TARGET(i), 0);
/* Program GCNT0/1 for getting aging data */
gcnt_ref = (cpr_vreg->ref_clk_khz * cpr_vreg->gcnt_time_us) / 1000;
gcnt = gcnt_ref * 3 / 2;
val = (gcnt & RBCPR_GCNT_TARGET_GCNT_MASK) <<
RBCPR_GCNT_TARGET_GCNT_SHIFT;
cpr_write(cpr_vreg, REG_RBCPR_GCNT_TARGET(0), val);
cpr_write(cpr_vreg, REG_RBCPR_GCNT_TARGET(1), val);
val = cpr_read(cpr_vreg, REG_RBCPR_GCNT_TARGET(0));
cpr_debug(cpr_vreg, "RBCPR_GCNT_TARGET0 = 0x%08x\n", val);
val = cpr_read(cpr_vreg, REG_RBCPR_GCNT_TARGET(1));
cpr_debug(cpr_vreg, "RBCPR_GCNT_TARGET1 = 0x%08x\n", val);
/* Program TIMER_INTERVAL to zero */
cpr_write(cpr_vreg, REG_RBCPR_TIMER_INTERVAL, 0);
/* Bypass sensors in collapsible domain */
if (cpr_vreg->aging_info->aging_sensor_bypass)
cpr_write(cpr_vreg, REG_RBCPR_SENSOR_BYPASS0,
(cpr_vreg->aging_info->aging_sensor_bypass &
RBCPR_SENSOR_MASK0_SENSOR(aging_sensor_info->sensor_id)));
/* Mask other sensors */
cpr_write(cpr_vreg, REG_RBCPR_SENSOR_MASK0,
RBCPR_SENSOR_MASK0_SENSOR(aging_sensor_info->sensor_id));
val = cpr_read(cpr_vreg, REG_RBCPR_SENSOR_MASK0);
cpr_debug(cpr_vreg, "RBCPR_SENSOR_MASK0 = 0x%08x\n", val);
/* Enable cpr controller */
cpr_ctl_modify(cpr_vreg, RBCPR_CTL_LOOP_EN, RBCPR_CTL_LOOP_EN);
/* Make sure cpr starts measurement with toggling busy bit */
mb();
/* Wait and Ignore the first measurement. Time-out after 5ms */
retries = 50;
while (retries-- && cpr_ctl_is_busy(cpr_vreg))
udelay(100);
if (retries < 0) {
cpr_err(cpr_vreg, "Aging calibration failed\n");
rc = -EBUSY;
goto _exit;
}
/* Set age page mode */
cpr_write(cpr_vreg, REG_RBCPR_HTOL_AGE, RBCPR_HTOL_AGE_PAGE);
aging_measurement_count = 0;
quot_delta_scaled_sum = 0;
for (i = 0; i < CPR_AGING_MEASUREMENT_ITERATIONS; i++) {
/* Send cont nack */
cpr_write(cpr_vreg, REG_RBIF_CONT_NACK_CMD, 1);
/*
* Make sure cpr starts next measurement with
* toggling busy bit
*/
mb();
/*
* Wait for controller to finish measurement
* and time-out after 5ms
*/
retries = 50;
while (retries-- && cpr_ctl_is_busy(cpr_vreg))
udelay(100);
if (retries < 0) {
cpr_err(cpr_vreg, "Aging calibration failed\n");
rc = -EBUSY;
goto _exit;
}
/* Check for PAGE_IS_AGE flag in status register */
val = cpr_read(cpr_vreg, REG_RBCPR_HTOL_AGE);
is_aging_measurement = val & RBCPR_AGE_DATA_STATUS;
val = cpr_read(cpr_vreg, REG_RBCPR_RESULT_1);
sel_fast = RBCPR_RESULT_1_SEL_FAST(val);
cpr_debug(cpr_vreg, "RBCPR_RESULT_1 = 0x%08x\n", val);
val = cpr_read(cpr_vreg, REG_RBCPR_DEBUG1);
cpr_debug(cpr_vreg, "RBCPR_DEBUG1 = 0x%08x\n", val);
if (sel_fast == 1) {
quot_min = RBCPR_DEBUG1_QUOT_FAST(val);
quot_max = RBCPR_DEBUG1_QUOT_SLOW(val);
} else {
quot_min = RBCPR_DEBUG1_QUOT_SLOW(val);
quot_max = RBCPR_DEBUG1_QUOT_FAST(val);
}
/*
* Scale the quotients so that they are equivalent to the fused
* values. This accounts for the difference in measurement
* interval times.
*/
quot_min_scaled = quot_min * (gcnt_ref + 1) / (gcnt + 1);
quot_max_scaled = quot_max * (gcnt_ref + 1) / (gcnt + 1);
quot_delta_scaled = 0;
if (is_aging_measurement) {
quot_delta_scaled = quot_min_scaled - quot_max_scaled;
quot_delta_results[aging_measurement_count++] =
quot_delta_scaled;
}
cpr_debug(cpr_vreg,
"Age sensor[%d]: measurement[%d]: page_is_age=%u quot_min = %d, quot_max = %d quot_min_scaled = %d, quot_max_scaled = %d quot_delta_scaled = %d\n",
aging_sensor_info->sensor_id, i, is_aging_measurement,
quot_min, quot_max, quot_min_scaled, quot_max_scaled,
quot_delta_scaled);
}
filtered_count
= aging_measurement_count - CPR_AGING_MEASUREMENT_FILTER * 2;
if (filtered_count > 0) {
sort(quot_delta_results, aging_measurement_count,
sizeof(*quot_delta_results), cmp_int, NULL);
quot_delta_scaled_sum = 0;
for (i = 0; i < filtered_count; i++)
quot_delta_scaled_sum
+= quot_delta_results[i
+ CPR_AGING_MEASUREMENT_FILTER];
aging_sensor_info->current_quot_diff
= quot_delta_scaled_sum / filtered_count;
cpr_debug(cpr_vreg,
"Age sensor[%d]: average aging quotient delta = %d (count = %d)\n",
aging_sensor_info->sensor_id,
aging_sensor_info->current_quot_diff, filtered_count);
} else {
cpr_err(cpr_vreg, "%d aging measurements completed after %d iterations\n",
aging_measurement_count,
CPR_AGING_MEASUREMENT_ITERATIONS);
rc = -EBUSY;
}
_exit:
/* Clear age page bit */
cpr_write(cpr_vreg, REG_RBCPR_HTOL_AGE, 0x0);
/* Disable the CPR controller after aging procedure */
cpr_ctl_modify(cpr_vreg, RBCPR_CTL_LOOP_EN, 0x0);
/* Clear the sensor bypass */
if (cpr_vreg->aging_info->aging_sensor_bypass)
cpr_write(cpr_vreg, REG_RBCPR_SENSOR_BYPASS0, 0x0);
/* Unmask all sensors */
cpr_write(cpr_vreg, REG_RBCPR_SENSOR_MASK0, 0x0);
/* Clear gcnt0/1 registers */
cpr_write(cpr_vreg, REG_RBCPR_GCNT_TARGET(0), 0x0);
cpr_write(cpr_vreg, REG_RBCPR_GCNT_TARGET(1), 0x0);
/* Program the delay count for the timer */
val = (cpr_vreg->ref_clk_khz * cpr_vreg->timer_delay_us) / 1000;
cpr_write(cpr_vreg, REG_RBCPR_TIMER_INTERVAL, val);
kfree(quot_delta_results);
return rc;
}
static void cpr_de_aging_adjustment(void *data)
{
struct cpr_regulator *cpr_vreg = (struct cpr_regulator *)data;
struct cpr_aging_info *aging_info = cpr_vreg->aging_info;
struct cpr_aging_sensor_info *aging_sensor_info;
int i, num_aging_sensors, retries, rc = 0;
int max_quot_diff = 0, ro_sel = 0;
u32 voltage_adjust, aging_voltage_adjust = 0;
aging_sensor_info = aging_info->sensor_info;
num_aging_sensors = aging_info->num_aging_sensors;
for (i = 0; i < num_aging_sensors; i++, aging_sensor_info++) {
retries = 2;
while (retries--) {
rc = cpr_get_aging_quot_delta(cpr_vreg,
aging_sensor_info);
if (!rc)
break;
}
if (rc && retries < 0) {
cpr_err(cpr_vreg, "error in age calibration: rc = %d\n",
rc);
aging_info->cpr_aging_error = true;
return;
}
max_quot_diff = max(max_quot_diff,
(aging_sensor_info->current_quot_diff -
aging_sensor_info->initial_quot_diff));
}
cpr_debug(cpr_vreg, "Max aging quot delta = %d\n",
max_quot_diff);
aging_voltage_adjust = DIV_ROUND_UP(max_quot_diff * 1000000,
aging_info->aging_ro_kv);
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners; i++) {
/* Remove initial max aging adjustment */
ro_sel = cpr_vreg->cpr_fuse_ro_sel[i];
cpr_vreg->cpr_fuse_target_quot[i] -=
(aging_info->cpr_ro_kv[ro_sel]
* aging_info->max_aging_margin) / 1000000;
aging_info->voltage_adjust[i] = 0;
if (aging_voltage_adjust > 0) {
/* Add required aging adjustment */
voltage_adjust = (aging_voltage_adjust
* aging_info->aging_derate[i]) / 1000;
voltage_adjust = min(voltage_adjust,
aging_info->max_aging_margin);
cpr_vreg->cpr_fuse_target_quot[i] +=
(aging_info->cpr_ro_kv[ro_sel]
* voltage_adjust) / 1000000;
aging_info->voltage_adjust[i] = voltage_adjust;
}
}
}
static int cpr_regulator_is_enabled(struct regulator_dev *rdev)
{
struct cpr_regulator *cpr_vreg = rdev_get_drvdata(rdev);
return cpr_vreg->vreg_enabled;
}
static int cpr_regulator_enable(struct regulator_dev *rdev)
{
struct cpr_regulator *cpr_vreg = rdev_get_drvdata(rdev);
int rc = 0;
/* Enable dependency power before vdd_apc */
if (cpr_vreg->vdd_mx) {
rc = regulator_enable(cpr_vreg->vdd_mx);
if (rc) {
cpr_err(cpr_vreg, "regulator_enable: vdd_mx: rc=%d\n",
rc);
return rc;
}
}
rc = regulator_enable(cpr_vreg->vdd_apc);
if (rc) {
cpr_err(cpr_vreg, "regulator_enable: vdd_apc: rc=%d\n", rc);
return rc;
}
mutex_lock(&cpr_vreg->cpr_mutex);
cpr_vreg->vreg_enabled = true;
if (cpr_is_allowed(cpr_vreg) && cpr_vreg->corner) {
cpr_irq_clr(cpr_vreg);
cpr_corner_restore(cpr_vreg, cpr_vreg->corner);
cpr_ctl_enable(cpr_vreg, cpr_vreg->corner);
}
mutex_unlock(&cpr_vreg->cpr_mutex);
return rc;
}
static int cpr_regulator_disable(struct regulator_dev *rdev)
{
struct cpr_regulator *cpr_vreg = rdev_get_drvdata(rdev);
int rc;
rc = regulator_disable(cpr_vreg->vdd_apc);
if (!rc) {
if (cpr_vreg->vdd_mx)
rc = regulator_disable(cpr_vreg->vdd_mx);
if (rc) {
cpr_err(cpr_vreg, "regulator_disable: vdd_mx: rc=%d\n",
rc);
return rc;
}
mutex_lock(&cpr_vreg->cpr_mutex);
cpr_vreg->vreg_enabled = false;
if (cpr_is_allowed(cpr_vreg))
cpr_ctl_disable(cpr_vreg);
mutex_unlock(&cpr_vreg->cpr_mutex);
} else {
cpr_err(cpr_vreg, "regulator_disable: vdd_apc: rc=%d\n", rc);
}
return rc;
}
static int cpr_calculate_de_aging_margin(struct cpr_regulator *cpr_vreg)
{
struct cpr_aging_info *aging_info = cpr_vreg->aging_info;
enum voltage_change_dir change_dir = NO_CHANGE;
u32 save_ctl, save_irq;
cpumask_t tmp_mask;
int rc = 0, i;
unsigned int current_mode;
save_ctl = cpr_read(cpr_vreg, REG_RBCPR_CTL);
save_irq = cpr_read(cpr_vreg, REG_RBIF_IRQ_EN(cpr_vreg->irq_line));
/* Disable interrupt and CPR */
cpr_irq_set(cpr_vreg, 0);
cpr_write(cpr_vreg, REG_RBCPR_CTL, 0);
if (aging_info->aging_corner > cpr_vreg->corner)
change_dir = UP;
else if (aging_info->aging_corner < cpr_vreg->corner)
change_dir = DOWN;
/* set selected reference voltage for de-aging */
rc = cpr_scale_voltage(cpr_vreg,
aging_info->aging_corner,
aging_info->aging_ref_voltage,
change_dir);
if (rc) {
cpr_err(cpr_vreg, "Unable to set aging reference voltage, rc = %d\n",
rc);
return rc;
}
current_mode = regulator_get_mode(cpr_vreg->vdd_apc);
if (current_mode < 0) {
cpr_err(cpr_vreg, "Failed to get vdd-supply mode, error=%d\n",
current_mode);
return current_mode;
}
/* Force PWM mode */
rc = regulator_set_mode(cpr_vreg->vdd_apc, REGULATOR_MODE_NORMAL);
if (rc) {
cpr_err(cpr_vreg, "unable to configure vdd-supply for mode=%u, rc=%d\n",
REGULATOR_MODE_NORMAL, rc);
return rc;
}
get_online_cpus();
cpumask_and(&tmp_mask, &cpr_vreg->cpu_mask, cpu_online_mask);
if (!cpumask_empty(&tmp_mask)) {
smp_call_function_any(&tmp_mask,
cpr_de_aging_adjustment,
cpr_vreg, true);
aging_info->cpr_aging_done = true;
if (!aging_info->cpr_aging_error)
for (i = CPR_FUSE_CORNER_MIN;
i <= cpr_vreg->num_fuse_corners; i++)
cpr_info(cpr_vreg, "Corner[%d]: age adjusted target quot = %d\n",
i, cpr_vreg->cpr_fuse_target_quot[i]);
}
put_online_cpus();
/* Set to initial mode */
rc = regulator_set_mode(cpr_vreg->vdd_apc, current_mode);
if (rc) {
cpr_err(cpr_vreg, "unable to configure vdd-supply for mode=%u, rc=%d\n",
current_mode, rc);
return rc;
}
/* Clear interrupts */
cpr_irq_clr(cpr_vreg);
/* Restore register values */
cpr_irq_set(cpr_vreg, save_irq);
cpr_write(cpr_vreg, REG_RBCPR_CTL, save_ctl);
return rc;
}
/* Note that cpr_vreg->cpr_mutex must be held by the caller. */
static int cpr_regulator_set_voltage(struct regulator_dev *rdev,
int corner, bool reset_quot)
{
struct cpr_regulator *cpr_vreg = rdev_get_drvdata(rdev);
struct cpr_aging_info *aging_info = cpr_vreg->aging_info;
int rc;
int new_volt;
enum voltage_change_dir change_dir = NO_CHANGE;
int fuse_corner = cpr_vreg->corner_map[corner];
if (cpr_is_allowed(cpr_vreg)) {
cpr_ctl_disable(cpr_vreg);
new_volt = cpr_vreg->last_volt[corner];
} else {
new_volt = cpr_vreg->open_loop_volt[corner];
}
cpr_debug(cpr_vreg, "[corner:%d, fuse_corner:%d] = %d uV\n",
corner, fuse_corner, new_volt);
if (corner > cpr_vreg->corner)
change_dir = UP;
else if (corner < cpr_vreg->corner)
change_dir = DOWN;
/* Read age sensor data and apply de-aging adjustments */
if (cpr_vreg->vreg_enabled && aging_info && !aging_info->cpr_aging_done
&& (corner <= aging_info->aging_corner)) {
rc = cpr_calculate_de_aging_margin(cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "failed in de-aging calibration: rc=%d\n",
rc);
} else {
change_dir = NO_CHANGE;
if (corner > aging_info->aging_corner)
change_dir = UP;
else if (corner < aging_info->aging_corner)
change_dir = DOWN;
}
reset_quot = true;
}
rc = cpr_scale_voltage(cpr_vreg, corner, new_volt, change_dir);
if (rc)
return rc;
if (cpr_vreg->vdd_mode_map) {
rc = regulator_set_mode(cpr_vreg->vdd_apc,
cpr_vreg->vdd_mode_map[corner]);
if (rc) {
cpr_err(cpr_vreg, "unable to configure vdd-supply for mode=%u, rc=%d\n",
cpr_vreg->vdd_mode_map[corner], rc);
return rc;
}
}
if (cpr_is_allowed(cpr_vreg) && cpr_vreg->vreg_enabled) {
cpr_irq_clr(cpr_vreg);
if (reset_quot)
cpr_corner_restore(cpr_vreg, corner);
else
cpr_corner_switch(cpr_vreg, corner);
cpr_ctl_enable(cpr_vreg, corner);
}
cpr_vreg->corner = corner;
return rc;
}
static int cpr_regulator_set_voltage_op(struct regulator_dev *rdev,
int corner, int corner_max, unsigned int *selector)
{
struct cpr_regulator *cpr_vreg = rdev_get_drvdata(rdev);
int rc;
mutex_lock(&cpr_vreg->cpr_mutex);
rc = cpr_regulator_set_voltage(rdev, corner, false);
mutex_unlock(&cpr_vreg->cpr_mutex);
return rc;
}
static int cpr_regulator_get_voltage(struct regulator_dev *rdev)
{
struct cpr_regulator *cpr_vreg = rdev_get_drvdata(rdev);
return cpr_vreg->corner;
}
/**
* cpr_regulator_list_corner_voltage() - return the ceiling voltage mapped to
* the specified voltage corner
* @rdev: Regulator device pointer for the cpr-regulator
* @corner: Voltage corner
*
* This function is passed as a callback function into the regulator ops that
* are registered for each cpr-regulator device.
*
* Return: voltage value in microvolts or -EINVAL if the corner is out of range
*/
static int cpr_regulator_list_corner_voltage(struct regulator_dev *rdev,
int corner)
{
struct cpr_regulator *cpr_vreg = rdev_get_drvdata(rdev);
if (corner >= CPR_CORNER_MIN && corner <= cpr_vreg->num_corners)
return cpr_vreg->ceiling_volt[corner];
else
return -EINVAL;
}
static struct regulator_ops cpr_corner_ops = {
.enable = cpr_regulator_enable,
.disable = cpr_regulator_disable,
.is_enabled = cpr_regulator_is_enabled,
.set_voltage = cpr_regulator_set_voltage_op,
.get_voltage = cpr_regulator_get_voltage,
.list_corner_voltage = cpr_regulator_list_corner_voltage,
};
#ifdef CONFIG_PM
static int cpr_suspend(struct cpr_regulator *cpr_vreg)
{
cpr_debug(cpr_vreg, "suspend\n");
cpr_ctl_disable(cpr_vreg);
cpr_irq_clr(cpr_vreg);
return 0;
}
static int cpr_resume(struct cpr_regulator *cpr_vreg)
{
cpr_debug(cpr_vreg, "resume\n");
cpr_irq_clr(cpr_vreg);
cpr_ctl_enable(cpr_vreg, cpr_vreg->corner);
return 0;
}
static int cpr_regulator_suspend(struct platform_device *pdev,
pm_message_t state)
{
struct cpr_regulator *cpr_vreg = platform_get_drvdata(pdev);
int rc = 0;
mutex_lock(&cpr_vreg->cpr_mutex);
if (cpr_is_allowed(cpr_vreg))
rc = cpr_suspend(cpr_vreg);
cpr_vreg->is_cpr_suspended = true;
mutex_unlock(&cpr_vreg->cpr_mutex);
return rc;
}
static int cpr_regulator_resume(struct platform_device *pdev)
{
struct cpr_regulator *cpr_vreg = platform_get_drvdata(pdev);
int rc = 0;
mutex_lock(&cpr_vreg->cpr_mutex);
cpr_vreg->is_cpr_suspended = false;
if (cpr_is_allowed(cpr_vreg))
rc = cpr_resume(cpr_vreg);
mutex_unlock(&cpr_vreg->cpr_mutex);
return rc;
}
#else
#define cpr_regulator_suspend NULL
#define cpr_regulator_resume NULL
#endif
static int cpr_config(struct cpr_regulator *cpr_vreg, struct device *dev)
{
int i;
u32 val, gcnt, reg;
void __iomem *rbcpr_clk;
int size;
if (cpr_vreg->rbcpr_clk_addr) {
/* Use 19.2 MHz clock for CPR. */
rbcpr_clk = ioremap(cpr_vreg->rbcpr_clk_addr, 4);
if (!rbcpr_clk) {
cpr_err(cpr_vreg, "Unable to map rbcpr_clk\n");
return -EINVAL;
}
reg = readl_relaxed(rbcpr_clk);
reg &= ~RBCPR_CLK_SEL_MASK;
reg |= RBCPR_CLK_SEL_19P2_MHZ & RBCPR_CLK_SEL_MASK;
writel_relaxed(reg, rbcpr_clk);
iounmap(rbcpr_clk);
}
/* Disable interrupt and CPR */
cpr_write(cpr_vreg, REG_RBIF_IRQ_EN(cpr_vreg->irq_line), 0);
cpr_write(cpr_vreg, REG_RBCPR_CTL, 0);
/* Program the default HW Ceiling, Floor and vlevel */
val = ((RBIF_LIMIT_CEILING_DEFAULT & RBIF_LIMIT_CEILING_MASK)
<< RBIF_LIMIT_CEILING_SHIFT)
| (RBIF_LIMIT_FLOOR_DEFAULT & RBIF_LIMIT_FLOOR_MASK);
cpr_write(cpr_vreg, REG_RBIF_LIMIT, val);
cpr_write(cpr_vreg, REG_RBIF_SW_VLEVEL, RBIF_SW_VLEVEL_DEFAULT);
/* Clear the target quotient value and gate count of all ROs */
for (i = 0; i < CPR_NUM_RING_OSC; i++)
cpr_write(cpr_vreg, REG_RBCPR_GCNT_TARGET(i), 0);
/* Init and save gcnt */
gcnt = (cpr_vreg->ref_clk_khz * cpr_vreg->gcnt_time_us) / 1000;
gcnt = (gcnt & RBCPR_GCNT_TARGET_GCNT_MASK) <<
RBCPR_GCNT_TARGET_GCNT_SHIFT;
cpr_vreg->gcnt = gcnt;
/* Program the delay count for the timer */
val = (cpr_vreg->ref_clk_khz * cpr_vreg->timer_delay_us) / 1000;
cpr_write(cpr_vreg, REG_RBCPR_TIMER_INTERVAL, val);
cpr_info(cpr_vreg, "Timer count: 0x%0x (for %d us)\n", val,
cpr_vreg->timer_delay_us);
/* Program Consecutive Up & Down */
val = ((cpr_vreg->timer_cons_down & RBIF_TIMER_ADJ_CONS_DOWN_MASK)
<< RBIF_TIMER_ADJ_CONS_DOWN_SHIFT) |
(cpr_vreg->timer_cons_up & RBIF_TIMER_ADJ_CONS_UP_MASK) |
((cpr_vreg->clamp_timer_interval & RBIF_TIMER_ADJ_CLAMP_INT_MASK)
<< RBIF_TIMER_ADJ_CLAMP_INT_SHIFT);
cpr_write(cpr_vreg, REG_RBIF_TIMER_ADJUST, val);
/* Program the control register */
cpr_vreg->up_threshold &= RBCPR_CTL_UP_THRESHOLD_MASK;
cpr_vreg->down_threshold &= RBCPR_CTL_DN_THRESHOLD_MASK;
val = (cpr_vreg->up_threshold << RBCPR_CTL_UP_THRESHOLD_SHIFT)
| (cpr_vreg->down_threshold << RBCPR_CTL_DN_THRESHOLD_SHIFT);
val |= RBCPR_CTL_TIMER_EN | RBCPR_CTL_COUNT_MODE;
val |= RBCPR_CTL_SW_AUTO_CONT_ACK_EN;
cpr_write(cpr_vreg, REG_RBCPR_CTL, val);
cpr_irq_set(cpr_vreg, CPR_INT_DEFAULT);
val = cpr_read(cpr_vreg, REG_RBCPR_VERSION);
if (val <= RBCPR_VER_2)
cpr_vreg->flags |= FLAGS_IGNORE_1ST_IRQ_STATUS;
size = cpr_vreg->num_corners + 1;
cpr_vreg->save_ctl = devm_kzalloc(dev, sizeof(int) * size, GFP_KERNEL);
cpr_vreg->save_irq = devm_kzalloc(dev, sizeof(int) * size, GFP_KERNEL);
if (!cpr_vreg->save_ctl || !cpr_vreg->save_irq)
return -ENOMEM;
for (i = 1; i < size; i++)
cpr_corner_save(cpr_vreg, i);
return 0;
}
static int cpr_fuse_is_setting_expected(struct cpr_regulator *cpr_vreg,
u32 sel_array[5])
{
u64 fuse_bits;
u32 ret;
fuse_bits = cpr_read_efuse_row(cpr_vreg, sel_array[0], sel_array[4]);
ret = (fuse_bits >> sel_array[1]) & ((1 << sel_array[2]) - 1);
if (ret == sel_array[3])
ret = 1;
else
ret = 0;
cpr_info(cpr_vreg, "[row:%d] = 0x%llx @%d:%d == %d ?: %s\n",
sel_array[0], fuse_bits,
sel_array[1], sel_array[2],
sel_array[3],
(ret == 1) ? "yes" : "no");
return ret;
}
static int cpr_voltage_uplift_wa_inc_volt(struct cpr_regulator *cpr_vreg,
struct device_node *of_node)
{
u32 uplift_voltage;
u32 uplift_max_volt = 0;
int highest_fuse_corner = cpr_vreg->num_fuse_corners;
int rc;
rc = of_property_read_u32(of_node,
"qcom,cpr-uplift-voltage", &uplift_voltage);
if (rc < 0) {
cpr_err(cpr_vreg, "cpr-uplift-voltage is missing, rc = %d", rc);
return rc;
}
rc = of_property_read_u32(of_node,
"qcom,cpr-uplift-max-volt", &uplift_max_volt);
if (rc < 0) {
cpr_err(cpr_vreg, "cpr-uplift-max-volt is missing, rc = %d",
rc);
return rc;
}
cpr_vreg->pvs_corner_v[highest_fuse_corner] += uplift_voltage;
if (cpr_vreg->pvs_corner_v[highest_fuse_corner] > uplift_max_volt)
cpr_vreg->pvs_corner_v[highest_fuse_corner] = uplift_max_volt;
return rc;
}
static int cpr_adjust_init_voltages(struct device_node *of_node,
struct cpr_regulator *cpr_vreg)
{
int tuple_count, tuple_match, i;
u32 index;
u32 volt_adjust = 0;
int len = 0;
int rc = 0;
if (!of_find_property(of_node, "qcom,cpr-init-voltage-adjustment",
&len)) {
/* No initial voltage adjustment needed. */
return 0;
}
if (cpr_vreg->cpr_fuse_map_count) {
if (cpr_vreg->cpr_fuse_map_match == FUSE_MAP_NO_MATCH) {
/*
* No matching index to use for initial voltage
* adjustment.
*/
return 0;
}
tuple_count = cpr_vreg->cpr_fuse_map_count;
tuple_match = cpr_vreg->cpr_fuse_map_match;
} else {
tuple_count = 1;
tuple_match = 0;
}
if (len != cpr_vreg->num_fuse_corners * tuple_count * sizeof(u32)) {
cpr_err(cpr_vreg, "qcom,cpr-init-voltage-adjustment length=%d is invalid\n",
len);
return -EINVAL;
}
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners; i++) {
index = tuple_match * cpr_vreg->num_fuse_corners
+ i - CPR_FUSE_CORNER_MIN;
rc = of_property_read_u32_index(of_node,
"qcom,cpr-init-voltage-adjustment", index,
&volt_adjust);
if (rc) {
cpr_err(cpr_vreg, "could not read qcom,cpr-init-voltage-adjustment index %u, rc=%d\n",
index, rc);
return rc;
}
if (volt_adjust) {
cpr_vreg->pvs_corner_v[i] += volt_adjust;
cpr_info(cpr_vreg, "adjusted initial voltage[%d]: %d -> %d uV\n",
i, cpr_vreg->pvs_corner_v[i] - volt_adjust,
cpr_vreg->pvs_corner_v[i]);
}
}
return rc;
}
/*
* Property qcom,cpr-fuse-init-voltage specifies the fuse position of the
* initial voltage for each fuse corner. MSB of the fuse value is a sign
* bit, and the remaining bits define the steps of the offset. Each step has
* units of microvolts defined in the qcom,cpr-fuse-init-voltage-step property.
* The initial voltages can be calculated using the formula:
* pvs_corner_v[corner] = ceiling_volt[corner] + (sign * steps * step_size_uv)
*/
static int cpr_pvs_per_corner_init(struct device_node *of_node,
struct cpr_regulator *cpr_vreg)
{
u64 efuse_bits;
int i, size, sign, steps, step_size_uv, rc;
u32 *fuse_sel, *tmp, *ref_uv;
struct property *prop;
char *init_volt_str;
init_volt_str = cpr_vreg->cpr_fuse_redundant
? "qcom,cpr-fuse-redun-init-voltage"
: "qcom,cpr-fuse-init-voltage";
prop = of_find_property(of_node, init_volt_str, NULL);
if (!prop) {
cpr_err(cpr_vreg, "%s is missing\n", init_volt_str);
return -EINVAL;
}
size = prop->length / sizeof(u32);
if (size != cpr_vreg->num_fuse_corners * 4) {
cpr_err(cpr_vreg,
"fuse position for init voltages is invalid\n");
return -EINVAL;
}
fuse_sel = kzalloc(sizeof(u32) * size, GFP_KERNEL);
if (!fuse_sel)
return -ENOMEM;
rc = of_property_read_u32_array(of_node, init_volt_str,
fuse_sel, size);
if (rc < 0) {
cpr_err(cpr_vreg,
"read cpr-fuse-init-voltage failed, rc = %d\n", rc);
kfree(fuse_sel);
return rc;
}
rc = of_property_read_u32(of_node, "qcom,cpr-init-voltage-step",
&step_size_uv);
if (rc < 0) {
cpr_err(cpr_vreg,
"read cpr-init-voltage-step failed, rc = %d\n", rc);
kfree(fuse_sel);
return rc;
}
ref_uv = kzalloc((cpr_vreg->num_fuse_corners + 1) * sizeof(*ref_uv),
GFP_KERNEL);
if (!ref_uv) {
kfree(fuse_sel);
return -ENOMEM;
}
rc = of_property_read_u32_array(of_node, "qcom,cpr-init-voltage-ref",
&ref_uv[CPR_FUSE_CORNER_MIN], cpr_vreg->num_fuse_corners);
if (rc < 0) {
cpr_err(cpr_vreg,
"read qcom,cpr-init-voltage-ref failed, rc = %d\n", rc);
kfree(fuse_sel);
kfree(ref_uv);
return rc;
}
tmp = fuse_sel;
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners; i++) {
efuse_bits = cpr_read_efuse_param(cpr_vreg, fuse_sel[0],
fuse_sel[1], fuse_sel[2], fuse_sel[3]);
sign = (efuse_bits & (1 << (fuse_sel[2] - 1))) ? -1 : 1;
steps = efuse_bits & ((1 << (fuse_sel[2] - 1)) - 1);
cpr_vreg->pvs_corner_v[i] =
ref_uv[i] + sign * steps * step_size_uv;
cpr_vreg->pvs_corner_v[i] = DIV_ROUND_UP(
cpr_vreg->pvs_corner_v[i],
cpr_vreg->step_volt) *
cpr_vreg->step_volt;
cpr_debug(cpr_vreg, "corner %d: sign = %d, steps = %d, volt = %d uV\n",
i, sign, steps, cpr_vreg->pvs_corner_v[i]);
fuse_sel += 4;
}
rc = cpr_adjust_init_voltages(of_node, cpr_vreg);
if (rc)
goto done;
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners; i++) {
if (cpr_vreg->pvs_corner_v[i]
> cpr_vreg->fuse_ceiling_volt[i]) {
cpr_info(cpr_vreg, "Warning: initial voltage[%d] %d above ceiling %d\n",
i, cpr_vreg->pvs_corner_v[i],
cpr_vreg->fuse_ceiling_volt[i]);
cpr_vreg->pvs_corner_v[i]
= cpr_vreg->fuse_ceiling_volt[i];
} else if (cpr_vreg->pvs_corner_v[i] <
cpr_vreg->fuse_floor_volt[i]) {
cpr_info(cpr_vreg, "Warning: initial voltage[%d] %d below floor %d\n",
i, cpr_vreg->pvs_corner_v[i],
cpr_vreg->fuse_floor_volt[i]);
cpr_vreg->pvs_corner_v[i]
= cpr_vreg->fuse_floor_volt[i];
}
}
done:
kfree(tmp);
kfree(ref_uv);
return rc;
}
/*
* A single PVS bin is stored in a fuse that's position is defined either
* in the qcom,pvs-fuse-redun property or in the qcom,pvs-fuse property.
* The fuse value defined in the qcom,pvs-fuse-redun-sel property is used
* to pick between the primary or redudant PVS fuse position.
* After the PVS bin value is read out successfully, it is used as the row
* index to get initial voltages for each fuse corner from the voltage table
* defined in the qcom,pvs-voltage-table property.
*/
static int cpr_pvs_single_bin_init(struct device_node *of_node,
struct cpr_regulator *cpr_vreg)
{
u64 efuse_bits;
u32 pvs_fuse[4], pvs_fuse_redun_sel[5];
int rc, i, stripe_size;
bool redundant;
size_t pvs_bins;
u32 *tmp;
rc = of_property_read_u32_array(of_node, "qcom,pvs-fuse-redun-sel",
pvs_fuse_redun_sel, 5);
if (rc < 0) {
cpr_err(cpr_vreg, "pvs-fuse-redun-sel missing: rc=%d\n", rc);
return rc;
}
redundant = cpr_fuse_is_setting_expected(cpr_vreg, pvs_fuse_redun_sel);
if (redundant) {
rc = of_property_read_u32_array(of_node, "qcom,pvs-fuse-redun",
pvs_fuse, 4);
if (rc < 0) {
cpr_err(cpr_vreg, "pvs-fuse-redun missing: rc=%d\n",
rc);
return rc;
}
} else {
rc = of_property_read_u32_array(of_node, "qcom,pvs-fuse",
pvs_fuse, 4);
if (rc < 0) {
cpr_err(cpr_vreg, "pvs-fuse missing: rc=%d\n", rc);
return rc;
}
}
/* Construct PVS process # from the efuse bits */
efuse_bits = cpr_read_efuse_row(cpr_vreg, pvs_fuse[0], pvs_fuse[3]);
cpr_vreg->pvs_bin = (efuse_bits >> pvs_fuse[1]) &
((1 << pvs_fuse[2]) - 1);
pvs_bins = 1 << pvs_fuse[2];
stripe_size = cpr_vreg->num_fuse_corners;
tmp = kzalloc(sizeof(u32) * pvs_bins * stripe_size, GFP_KERNEL);
if (!tmp)
return -ENOMEM;
rc = of_property_read_u32_array(of_node, "qcom,pvs-voltage-table",
tmp, pvs_bins * stripe_size);
if (rc < 0) {
cpr_err(cpr_vreg, "pvs-voltage-table missing: rc=%d\n", rc);
kfree(tmp);
return rc;
}
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners; i++)
cpr_vreg->pvs_corner_v[i] = tmp[cpr_vreg->pvs_bin *
stripe_size + i - 1];
kfree(tmp);
rc = cpr_adjust_init_voltages(of_node, cpr_vreg);
if (rc)
return rc;
return 0;
}
/*
* The function reads VDD_MX dependency parameters from device node.
* Select the qcom,vdd-mx-corner-map length equal to either num_fuse_corners
* or num_corners based on selected vdd-mx-vmin-method.
*/
static int cpr_parse_vdd_mx_parameters(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
u32 corner_map_len;
int rc, len, size;
rc = of_property_read_u32(of_node, "qcom,vdd-mx-vmax",
&cpr_vreg->vdd_mx_vmax);
if (rc < 0) {
cpr_err(cpr_vreg, "vdd-mx-vmax missing: rc=%d\n", rc);
return rc;
}
rc = of_property_read_u32(of_node, "qcom,vdd-mx-vmin-method",
&cpr_vreg->vdd_mx_vmin_method);
if (rc < 0) {
cpr_err(cpr_vreg, "vdd-mx-vmin-method missing: rc=%d\n",
rc);
return rc;
}
if (cpr_vreg->vdd_mx_vmin_method > VDD_MX_VMIN_APC_CORNER_MAP) {
cpr_err(cpr_vreg, "Invalid vdd-mx-vmin-method(%d)\n",
cpr_vreg->vdd_mx_vmin_method);
return -EINVAL;
}
switch (cpr_vreg->vdd_mx_vmin_method) {
case VDD_MX_VMIN_APC_FUSE_CORNER_MAP:
corner_map_len = cpr_vreg->num_fuse_corners;
break;
case VDD_MX_VMIN_APC_CORNER_MAP:
corner_map_len = cpr_vreg->num_corners;
break;
default:
cpr_vreg->vdd_mx_corner_map = NULL;
return 0;
}
if (!of_find_property(of_node, "qcom,vdd-mx-corner-map", &len)) {
cpr_err(cpr_vreg, "qcom,vdd-mx-corner-map missing");
return -EINVAL;
}
size = len / sizeof(u32);
if (size != corner_map_len) {
cpr_err(cpr_vreg,
"qcom,vdd-mx-corner-map length=%d is invalid: required:%u\n",
size, corner_map_len);
return -EINVAL;
}
cpr_vreg->vdd_mx_corner_map = devm_kzalloc(&pdev->dev,
(corner_map_len + 1) * sizeof(*cpr_vreg->vdd_mx_corner_map),
GFP_KERNEL);
if (!cpr_vreg->vdd_mx_corner_map)
return -ENOMEM;
rc = of_property_read_u32_array(of_node,
"qcom,vdd-mx-corner-map",
&cpr_vreg->vdd_mx_corner_map[1],
corner_map_len);
if (rc)
cpr_err(cpr_vreg,
"read qcom,vdd-mx-corner-map failed, rc = %d\n", rc);
return rc;
}
#define MAX_CHARS_PER_INT 10
/*
* The initial voltage for each fuse corner may be determined by one of two
* possible styles of fuse. If qcom,cpr-fuse-init-voltage is present, then
* the initial voltages are encoded in a fuse for each fuse corner. If it is
* not present, then the initial voltages are all determined using a single
* PVS bin fuse value.
*/
static int cpr_pvs_init(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
int highest_fuse_corner = cpr_vreg->num_fuse_corners;
int i, rc, pos;
size_t buflen;
char *buf;
rc = of_property_read_u32(of_node, "qcom,cpr-apc-volt-step",
&cpr_vreg->step_volt);
if (rc < 0) {
cpr_err(cpr_vreg, "read cpr-apc-volt-step failed, rc = %d\n",
rc);
return rc;
} else if (cpr_vreg->step_volt == 0) {
cpr_err(cpr_vreg, "apc voltage step size can't be set to 0.\n");
return -EINVAL;
}
if (of_find_property(of_node, "qcom,cpr-fuse-init-voltage", NULL)) {
rc = cpr_pvs_per_corner_init(of_node, cpr_vreg);
if (rc < 0) {
cpr_err(cpr_vreg, "get pvs per corner failed, rc = %d",
rc);
return rc;
}
} else {
rc = cpr_pvs_single_bin_init(of_node, cpr_vreg);
if (rc < 0) {
cpr_err(cpr_vreg,
"get pvs from single bin failed, rc = %d", rc);
return rc;
}
}
if (cpr_vreg->flags & FLAGS_UPLIFT_QUOT_VOLT) {
rc = cpr_voltage_uplift_wa_inc_volt(cpr_vreg, of_node);
if (rc < 0) {
cpr_err(cpr_vreg, "pvs volt uplift wa apply failed: %d",
rc);
return rc;
}
}
/*
* Allow the highest fuse corner's PVS voltage to define the ceiling
* voltage for that corner in order to support SoC's in which variable
* ceiling values are required.
*/
if (cpr_vreg->pvs_corner_v[highest_fuse_corner] >
cpr_vreg->fuse_ceiling_volt[highest_fuse_corner])
cpr_vreg->fuse_ceiling_volt[highest_fuse_corner] =
cpr_vreg->pvs_corner_v[highest_fuse_corner];
/*
* Restrict all fuse corner PVS voltages based upon per corner
* ceiling and floor voltages.
*/
for (i = CPR_FUSE_CORNER_MIN; i <= highest_fuse_corner; i++)
if (cpr_vreg->pvs_corner_v[i] > cpr_vreg->fuse_ceiling_volt[i])
cpr_vreg->pvs_corner_v[i]
= cpr_vreg->fuse_ceiling_volt[i];
else if (cpr_vreg->pvs_corner_v[i]
< cpr_vreg->fuse_floor_volt[i])
cpr_vreg->pvs_corner_v[i]
= cpr_vreg->fuse_floor_volt[i];
cpr_vreg->ceiling_max
= cpr_vreg->fuse_ceiling_volt[highest_fuse_corner];
/*
* Log ceiling, floor, and initial voltages since they are critical for
* all CPR debugging.
*/
buflen = cpr_vreg->num_fuse_corners * (MAX_CHARS_PER_INT + 2)
* sizeof(*buf);
buf = kzalloc(buflen, GFP_KERNEL);
if (buf == NULL) {
cpr_err(cpr_vreg, "Could not allocate memory for corner voltage logging\n");
return 0;
}
for (i = CPR_FUSE_CORNER_MIN, pos = 0; i <= highest_fuse_corner; i++)
pos += scnprintf(buf + pos, buflen - pos, "%u%s",
cpr_vreg->pvs_corner_v[i],
i < highest_fuse_corner ? " " : "");
cpr_info(cpr_vreg, "pvs voltage: [%s] uV\n", buf);
for (i = CPR_FUSE_CORNER_MIN, pos = 0; i <= highest_fuse_corner; i++)
pos += scnprintf(buf + pos, buflen - pos, "%d%s",
cpr_vreg->fuse_ceiling_volt[i],
i < highest_fuse_corner ? " " : "");
cpr_info(cpr_vreg, "ceiling voltage: [%s] uV\n", buf);
for (i = CPR_FUSE_CORNER_MIN, pos = 0; i <= highest_fuse_corner; i++)
pos += scnprintf(buf + pos, buflen - pos, "%d%s",
cpr_vreg->fuse_floor_volt[i],
i < highest_fuse_corner ? " " : "");
cpr_info(cpr_vreg, "floor voltage: [%s] uV\n", buf);
kfree(buf);
return 0;
}
#define CPR_PROP_READ_U32(cpr_vreg, of_node, cpr_property, cpr_config, rc) \
do { \
if (!rc) { \
rc = of_property_read_u32(of_node, \
"qcom," cpr_property, \
cpr_config); \
if (rc) { \
cpr_err(cpr_vreg, "Missing " #cpr_property \
": rc = %d\n", rc); \
} \
} \
} while (0)
static int cpr_apc_init(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
int i, rc = 0;
for (i = 0; i < ARRAY_SIZE(vdd_apc_name); i++) {
cpr_vreg->vdd_apc = devm_regulator_get_optional(&pdev->dev,
vdd_apc_name[i]);
rc = PTR_RET(cpr_vreg->vdd_apc);
if (!IS_ERR_OR_NULL(cpr_vreg->vdd_apc))
break;
}
if (rc) {
if (rc != -EPROBE_DEFER)
cpr_err(cpr_vreg, "devm_regulator_get: rc=%d\n", rc);
return rc;
}
/* Check dependencies */
if (of_find_property(of_node, "vdd-mx-supply", NULL)) {
cpr_vreg->vdd_mx = devm_regulator_get(&pdev->dev, "vdd-mx");
if (IS_ERR_OR_NULL(cpr_vreg->vdd_mx)) {
rc = PTR_RET(cpr_vreg->vdd_mx);
if (rc != -EPROBE_DEFER)
cpr_err(cpr_vreg,
"devm_regulator_get: vdd-mx: rc=%d\n",
rc);
return rc;
}
}
return 0;
}
static void cpr_apc_exit(struct cpr_regulator *cpr_vreg)
{
if (cpr_vreg->vreg_enabled) {
regulator_disable(cpr_vreg->vdd_apc);
if (cpr_vreg->vdd_mx)
regulator_disable(cpr_vreg->vdd_mx);
}
}
static int cpr_voltage_uplift_wa_inc_quot(struct cpr_regulator *cpr_vreg,
struct device_node *of_node)
{
u32 delta_quot[3];
int rc, i;
rc = of_property_read_u32_array(of_node,
"qcom,cpr-uplift-quotient", delta_quot, 3);
if (rc < 0) {
cpr_err(cpr_vreg, "cpr-uplift-quotient is missing: %d", rc);
return rc;
}
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners; i++)
cpr_vreg->cpr_fuse_target_quot[i] += delta_quot[i-1];
return rc;
}
static void cpr_parse_pvs_version_fuse(struct cpr_regulator *cpr_vreg,
struct device_node *of_node)
{
int rc;
u64 fuse_bits;
u32 fuse_sel[4];
rc = of_property_read_u32_array(of_node,
"qcom,pvs-version-fuse-sel", fuse_sel, 4);
if (!rc) {
fuse_bits = cpr_read_efuse_row(cpr_vreg,
fuse_sel[0], fuse_sel[3]);
cpr_vreg->pvs_version = (fuse_bits >> fuse_sel[1]) &
((1 << fuse_sel[2]) - 1);
cpr_info(cpr_vreg, "[row: %d]: 0x%llx, pvs_version = %d\n",
fuse_sel[0], fuse_bits, cpr_vreg->pvs_version);
} else {
cpr_vreg->pvs_version = 0;
}
}
/**
* cpr_get_open_loop_voltage() - fill the open_loop_volt array with linearly
* interpolated open-loop CPR voltage values.
* @cpr_vreg: Handle to the cpr-regulator device
* @dev: Device pointer for the cpr-regulator device
* @corner_max: Array of length (cpr_vreg->num_fuse_corners + 1) which maps from
* fuse corners to the highest virtual corner corresponding to a
* given fuse corner
* @freq_map: Array of length (cpr_vreg->num_corners + 1) which maps from
* virtual corners to frequencies in Hz.
* @maps_valid: Boolean which indicates if the values in corner_max and freq_map
* are valid. If they are not valid, then the open_loop_volt
* values are not interpolated.
*/
static int cpr_get_open_loop_voltage(struct cpr_regulator *cpr_vreg,
struct device *dev, const u32 *corner_max, const u32 *freq_map,
bool maps_valid)
{
int rc = 0;
int i, j;
u64 volt_high, volt_low, freq_high, freq_low, freq, temp, temp_limit;
u32 *max_factor = NULL;
cpr_vreg->open_loop_volt = devm_kzalloc(dev,
sizeof(int) * (cpr_vreg->num_corners + 1), GFP_KERNEL);
if (!cpr_vreg->open_loop_volt)
return -ENOMEM;
/*
* Set open loop voltage to be equal to per-fuse-corner initial voltage
* by default. This ensures that the open loop voltage is valid for
* all virtual corners even if some virtual corner to frequency mappings
* are missing. It also ensures that the voltage is valid for the
* higher corners not utilized by a given speed-bin.
*/
for (i = CPR_CORNER_MIN; i <= cpr_vreg->num_corners; i++)
cpr_vreg->open_loop_volt[i]
= cpr_vreg->pvs_corner_v[cpr_vreg->corner_map[i]];
if (!maps_valid || !corner_max || !freq_map
|| !of_find_property(dev->of_node,
"qcom,cpr-voltage-scaling-factor-max", NULL)) {
/* Not using interpolation */
return 0;
}
max_factor
= kzalloc(sizeof(*max_factor) * (cpr_vreg->num_fuse_corners + 1),
GFP_KERNEL);
if (!max_factor)
return -ENOMEM;
rc = of_property_read_u32_array(dev->of_node,
"qcom,cpr-voltage-scaling-factor-max",
&max_factor[CPR_FUSE_CORNER_MIN],
cpr_vreg->num_fuse_corners);
if (rc) {
cpr_debug(cpr_vreg, "failed to read qcom,cpr-voltage-scaling-factor-max; initial voltage interpolation not possible\n");
kfree(max_factor);
return 0;
}
for (j = CPR_FUSE_CORNER_MIN + 1; j <= cpr_vreg->num_fuse_corners;
j++) {
freq_high = freq_map[corner_max[j]];
freq_low = freq_map[corner_max[j - 1]];
volt_high = cpr_vreg->pvs_corner_v[j];
volt_low = cpr_vreg->pvs_corner_v[j - 1];
if (freq_high <= freq_low || volt_high <= volt_low)
continue;
for (i = corner_max[j - 1] + 1; i < corner_max[j]; i++) {
freq = freq_map[i];
if (freq_high <= freq)
continue;
temp = (freq_high - freq) * (volt_high - volt_low);
do_div(temp, (u32)(freq_high - freq_low));
/*
* max_factor[j] has units of uV/MHz while freq values
* have units of Hz. Divide by 1000000 to convert.
*/
temp_limit = (freq_high - freq) * max_factor[j];
do_div(temp_limit, 1000000);
cpr_vreg->open_loop_volt[i]
= volt_high - min(temp, temp_limit);
cpr_vreg->open_loop_volt[i]
= DIV_ROUND_UP(cpr_vreg->open_loop_volt[i],
cpr_vreg->step_volt)
* cpr_vreg->step_volt;
}
}
kfree(max_factor);
return 0;
}
/*
* Limit the per-virtual-corner open-loop voltages using the per-virtual-corner
* ceiling and floor voltage values. This must be called only after the
* open_loop_volt, ceiling, and floor arrays have all been initialized.
*/
static int cpr_limit_open_loop_voltage(struct cpr_regulator *cpr_vreg)
{
int i;
for (i = CPR_CORNER_MIN; i <= cpr_vreg->num_corners; i++) {
if (cpr_vreg->open_loop_volt[i] > cpr_vreg->ceiling_volt[i])
cpr_vreg->open_loop_volt[i] = cpr_vreg->ceiling_volt[i];
else if (cpr_vreg->open_loop_volt[i] < cpr_vreg->floor_volt[i])
cpr_vreg->open_loop_volt[i] = cpr_vreg->floor_volt[i];
}
return 0;
}
/*
* Fill an OPP table for the cpr-regulator device struct with pairs of
* <virtual voltage corner number, open loop voltage> tuples.
*/
static int cpr_populate_opp_table(struct cpr_regulator *cpr_vreg,
struct device *dev)
{
int i, rc = 0;
for (i = CPR_CORNER_MIN; i <= cpr_vreg->num_corners; i++) {
rc |= dev_pm_opp_add(dev, i, cpr_vreg->open_loop_volt[i]);
if (rc)
cpr_debug(cpr_vreg, "could not add OPP entry <%d, %d>, rc=%d\n",
i, cpr_vreg->open_loop_volt[i], rc);
}
if (rc)
cpr_err(cpr_vreg, "adding OPP entry failed - OPP may not be enabled, rc=%d\n",
rc);
return 0;
}
/*
* Conditionally reduce the per-virtual-corner ceiling voltages if certain
* device tree flags are present. This must be called only after the ceiling
* array has been initialized and the open_loop_volt array values have been
* initialized and limited to the existing floor to ceiling voltage range.
*/
static int cpr_reduce_ceiling_voltage(struct cpr_regulator *cpr_vreg,
struct device *dev)
{
bool reduce_to_fuse_open_loop, reduce_to_interpolated_open_loop;
int i;
reduce_to_fuse_open_loop = of_property_read_bool(dev->of_node,
"qcom,cpr-init-voltage-as-ceiling");
reduce_to_interpolated_open_loop = of_property_read_bool(dev->of_node,
"qcom,cpr-scaled-init-voltage-as-ceiling");
if (!reduce_to_fuse_open_loop && !reduce_to_interpolated_open_loop)
return 0;
for (i = CPR_CORNER_MIN; i <= cpr_vreg->num_corners; i++) {
if (reduce_to_interpolated_open_loop &&
cpr_vreg->open_loop_volt[i] < cpr_vreg->ceiling_volt[i])
cpr_vreg->ceiling_volt[i] = cpr_vreg->open_loop_volt[i];
else if (reduce_to_fuse_open_loop &&
cpr_vreg->pvs_corner_v[cpr_vreg->corner_map[i]]
< cpr_vreg->ceiling_volt[i])
cpr_vreg->ceiling_volt[i]
= max((u32)cpr_vreg->floor_volt[i],
cpr_vreg->pvs_corner_v[cpr_vreg->corner_map[i]]);
cpr_debug(cpr_vreg, "lowered ceiling[%d] = %d uV\n",
i, cpr_vreg->ceiling_volt[i]);
}
return 0;
}
static int cpr_adjust_target_quot_offsets(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
int tuple_count, tuple_match, i;
u32 index;
u32 quot_offset_adjust = 0;
int len = 0;
int rc = 0;
char *quot_offset_str;
quot_offset_str = "qcom,cpr-quot-offset-adjustment";
if (!of_find_property(of_node, quot_offset_str, &len)) {
/* No static quotient adjustment needed. */
return 0;
}
if (cpr_vreg->cpr_fuse_map_count) {
if (cpr_vreg->cpr_fuse_map_match == FUSE_MAP_NO_MATCH) {
/* No matching index to use for quotient adjustment. */
return 0;
}
tuple_count = cpr_vreg->cpr_fuse_map_count;
tuple_match = cpr_vreg->cpr_fuse_map_match;
} else {
tuple_count = 1;
tuple_match = 0;
}
if (len != cpr_vreg->num_fuse_corners * tuple_count * sizeof(u32)) {
cpr_err(cpr_vreg, "%s length=%d is invalid\n", quot_offset_str,
len);
return -EINVAL;
}
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners; i++) {
index = tuple_match * cpr_vreg->num_fuse_corners
+ i - CPR_FUSE_CORNER_MIN;
rc = of_property_read_u32_index(of_node, quot_offset_str, index,
&quot_offset_adjust);
if (rc) {
cpr_err(cpr_vreg, "could not read %s index %u, rc=%d\n",
quot_offset_str, index, rc);
return rc;
}
if (quot_offset_adjust) {
cpr_vreg->fuse_quot_offset[i] += quot_offset_adjust;
cpr_info(cpr_vreg, "Corner[%d]: adjusted target quot = %d\n",
i, cpr_vreg->fuse_quot_offset[i]);
}
}
return rc;
}
static int cpr_get_fuse_quot_offset(struct cpr_regulator *cpr_vreg,
struct platform_device *pdev,
struct cpr_quot_scale *quot_scale)
{
struct device *dev = &pdev->dev;
struct property *prop;
u32 *fuse_sel, *tmp, *offset_multiplier = NULL;
int rc = 0, i, size, len;
char *quot_offset_str;
quot_offset_str = cpr_vreg->cpr_fuse_redundant
? "qcom,cpr-fuse-redun-quot-offset"
: "qcom,cpr-fuse-quot-offset";
prop = of_find_property(dev->of_node, quot_offset_str, NULL);
if (!prop) {
cpr_debug(cpr_vreg, "%s not present\n", quot_offset_str);
return 0;
}
size = prop->length / sizeof(u32);
if (size != cpr_vreg->num_fuse_corners * 4) {
cpr_err(cpr_vreg, "fuse position for quot offset is invalid\n");
return -EINVAL;
}
fuse_sel = kzalloc(sizeof(u32) * size, GFP_KERNEL);
if (!fuse_sel)
return -ENOMEM;
rc = of_property_read_u32_array(dev->of_node, quot_offset_str,
fuse_sel, size);
if (rc < 0) {
cpr_err(cpr_vreg, "read %s failed, rc = %d\n", quot_offset_str,
rc);
kfree(fuse_sel);
return rc;
}
cpr_vreg->fuse_quot_offset = devm_kzalloc(dev,
sizeof(u32) * (cpr_vreg->num_fuse_corners + 1),
GFP_KERNEL);
if (!cpr_vreg->fuse_quot_offset) {
kfree(fuse_sel);
return -ENOMEM;
}
if (!of_find_property(dev->of_node,
"qcom,cpr-fuse-quot-offset-scale", &len)) {
cpr_debug(cpr_vreg, "qcom,cpr-fuse-quot-offset-scale not present\n");
} else {
if (len != cpr_vreg->num_fuse_corners * sizeof(u32)) {
cpr_err(cpr_vreg, "the size of qcom,cpr-fuse-quot-offset-scale is invalid\n");
kfree(fuse_sel);
return -EINVAL;
}
offset_multiplier = kzalloc(sizeof(*offset_multiplier)
* (cpr_vreg->num_fuse_corners + 1),
GFP_KERNEL);
if (!offset_multiplier) {
kfree(fuse_sel);
return -ENOMEM;
}
rc = of_property_read_u32_array(dev->of_node,
"qcom,cpr-fuse-quot-offset-scale",
&offset_multiplier[1],
cpr_vreg->num_fuse_corners);
if (rc < 0) {
cpr_err(cpr_vreg, "read qcom,cpr-fuse-quot-offset-scale failed, rc = %d\n",
rc);
kfree(fuse_sel);
goto out;
}
}
tmp = fuse_sel;
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners; i++) {
cpr_vreg->fuse_quot_offset[i] = cpr_read_efuse_param(cpr_vreg,
fuse_sel[0], fuse_sel[1], fuse_sel[2],
fuse_sel[3]);
if (offset_multiplier)
cpr_vreg->fuse_quot_offset[i] *= offset_multiplier[i];
fuse_sel += 4;
}
rc = cpr_adjust_target_quot_offsets(pdev, cpr_vreg);
kfree(tmp);
out:
kfree(offset_multiplier);
return rc;
}
/*
* Adjust the per-virtual-corner open loop voltage with an offset specfied by a
* device-tree property. This must be called after open-loop voltage scaling.
*/
static int cpr_virtual_corner_voltage_adjust(struct cpr_regulator *cpr_vreg,
struct device *dev)
{
char *prop_name = "qcom,cpr-virtual-corner-init-voltage-adjustment";
int i, rc, tuple_count, tuple_match, index, len;
u32 voltage_adjust;
if (!of_find_property(dev->of_node, prop_name, &len)) {
cpr_debug(cpr_vreg, "%s not specified\n", prop_name);
return 0;
}
if (cpr_vreg->cpr_fuse_map_count) {
if (cpr_vreg->cpr_fuse_map_match == FUSE_MAP_NO_MATCH) {
/* No matching index to use for voltage adjustment. */
return 0;
}
tuple_count = cpr_vreg->cpr_fuse_map_count;
tuple_match = cpr_vreg->cpr_fuse_map_match;
} else {
tuple_count = 1;
tuple_match = 0;
}
if (len != cpr_vreg->num_corners * tuple_count * sizeof(u32)) {
cpr_err(cpr_vreg, "%s length=%d is invalid\n", prop_name,
len);
return -EINVAL;
}
for (i = CPR_CORNER_MIN; i <= cpr_vreg->num_corners; i++) {
index = tuple_match * cpr_vreg->num_corners
+ i - CPR_CORNER_MIN;
rc = of_property_read_u32_index(dev->of_node, prop_name,
index, &voltage_adjust);
if (rc) {
cpr_err(cpr_vreg, "could not read %s index %u, rc=%d\n",
prop_name, index, rc);
return rc;
}
if (voltage_adjust) {
cpr_vreg->open_loop_volt[i] += (int)voltage_adjust;
cpr_info(cpr_vreg, "corner=%d adjusted open-loop voltage=%d\n",
i, cpr_vreg->open_loop_volt[i]);
}
}
return 0;
}
/*
* Adjust the per-virtual-corner quot with an offset specfied by a
* device-tree property. This must be called after the quot-scaling adjustments
* are completed.
*/
static int cpr_virtual_corner_quot_adjust(struct cpr_regulator *cpr_vreg,
struct device *dev)
{
char *prop_name = "qcom,cpr-virtual-corner-quotient-adjustment";
int i, rc, tuple_count, tuple_match, index, len;
u32 quot_adjust;
if (!of_find_property(dev->of_node, prop_name, &len)) {
cpr_debug(cpr_vreg, "%s not specified\n", prop_name);
return 0;
}
if (cpr_vreg->cpr_fuse_map_count) {
if (cpr_vreg->cpr_fuse_map_match == FUSE_MAP_NO_MATCH) {
/* No matching index to use for quotient adjustment. */
return 0;
}
tuple_count = cpr_vreg->cpr_fuse_map_count;
tuple_match = cpr_vreg->cpr_fuse_map_match;
} else {
tuple_count = 1;
tuple_match = 0;
}
if (len != cpr_vreg->num_corners * tuple_count * sizeof(u32)) {
cpr_err(cpr_vreg, "%s length=%d is invalid\n", prop_name,
len);
return -EINVAL;
}
for (i = CPR_CORNER_MIN; i <= cpr_vreg->num_corners; i++) {
index = tuple_match * cpr_vreg->num_corners
+ i - CPR_CORNER_MIN;
rc = of_property_read_u32_index(dev->of_node, prop_name,
index, &quot_adjust);
if (rc) {
cpr_err(cpr_vreg, "could not read %s index %u, rc=%d\n",
prop_name, index, rc);
return rc;
}
if (quot_adjust) {
cpr_vreg->quot_adjust[i] -= (int)quot_adjust;
cpr_info(cpr_vreg, "corner=%d adjusted quotient=%d\n",
i,
cpr_vreg->cpr_fuse_target_quot[cpr_vreg->corner_map[i]]
- cpr_vreg->quot_adjust[i]);
}
}
return 0;
}
/*
* cpr_get_corner_quot_adjustment() -- get the quot_adjust for each corner.
*
* Get the virtual corner to fuse corner mapping and virtual corner to APC clock
* frequency mapping from device tree.
* Calculate the quotient adjustment scaling factor for those corners mapping to
* all fuse corners except for the lowest one using linear interpolation.
* Calculate the quotient adjustment for each of these virtual corners using the
* min of the calculated scaling factor and the constant max scaling factor
* defined for each fuse corner in device tree.
*/
static int cpr_get_corner_quot_adjustment(struct cpr_regulator *cpr_vreg,
struct device *dev)
{
int rc = 0;
int highest_fuse_corner = cpr_vreg->num_fuse_corners;
int i, j, size;
struct property *prop;
bool corners_mapped, match_found;
u32 *tmp, *freq_map = NULL;
u32 corner, freq_corner;
u32 *freq_max = NULL;
u32 *scaling = NULL;
u32 *max_factor = NULL;
u32 *corner_max = NULL;
bool maps_valid = false;
prop = of_find_property(dev->of_node, "qcom,cpr-corner-map", NULL);
if (prop) {
size = prop->length / sizeof(u32);
corners_mapped = true;
} else {
size = cpr_vreg->num_fuse_corners;
corners_mapped = false;
}
cpr_vreg->corner_map = devm_kzalloc(dev, sizeof(int) * (size + 1),
GFP_KERNEL);
if (!cpr_vreg->corner_map)
return -ENOMEM;
cpr_vreg->num_corners = size;
cpr_vreg->quot_adjust = devm_kzalloc(dev,
sizeof(u32) * (cpr_vreg->num_corners + 1),
GFP_KERNEL);
if (!cpr_vreg->quot_adjust)
return -ENOMEM;
if (!corners_mapped) {
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners;
i++)
cpr_vreg->corner_map[i] = i;
goto free_arrays;
} else {
rc = of_property_read_u32_array(dev->of_node,
"qcom,cpr-corner-map", &cpr_vreg->corner_map[1], size);
if (rc) {
cpr_err(cpr_vreg,
"qcom,cpr-corner-map missing, rc = %d\n", rc);
return rc;
}
/*
* Verify that the virtual corner to fuse corner mapping is
* valid.
*/
for (i = CPR_CORNER_MIN; i <= cpr_vreg->num_corners; i++) {
if (cpr_vreg->corner_map[i] > cpr_vreg->num_fuse_corners
|| cpr_vreg->corner_map[i] < CPR_FUSE_CORNER_MIN) {
cpr_err(cpr_vreg, "qcom,cpr-corner-map contains an element %d which isn't in the allowed range [%d, %d]\n",
cpr_vreg->corner_map[i],
CPR_FUSE_CORNER_MIN,
cpr_vreg->num_fuse_corners);
return -EINVAL;
}
}
}
prop = of_find_property(dev->of_node,
"qcom,cpr-speed-bin-max-corners", NULL);
if (!prop) {
cpr_debug(cpr_vreg, "qcom,cpr-speed-bin-max-corner missing\n");
goto free_arrays;
}
size = prop->length / sizeof(u32);
tmp = kcalloc(size, sizeof(*tmp), GFP_KERNEL);
if (!tmp)
return -ENOMEM;
rc = of_property_read_u32_array(dev->of_node,
"qcom,cpr-speed-bin-max-corners", tmp, size);
if (rc < 0) {
kfree(tmp);
cpr_err(cpr_vreg,
"get cpr-speed-bin-max-corners failed, rc = %d\n", rc);
return rc;
}
corner_max = kcalloc((cpr_vreg->num_fuse_corners + 1),
sizeof(*corner_max), GFP_KERNEL);
freq_max = kcalloc((cpr_vreg->num_fuse_corners + 1), sizeof(*freq_max),
GFP_KERNEL);
if (corner_max == NULL || freq_max == NULL) {
kfree(tmp);
rc = -ENOMEM;
goto free_arrays;
}
/*
* Get the maximum virtual corner for each fuse corner based upon the
* speed_bin and pvs_version values.
*/
match_found = false;
for (i = 0; i < size; i += cpr_vreg->num_fuse_corners + 2) {
if (tmp[i] != cpr_vreg->speed_bin &&
tmp[i] != FUSE_PARAM_MATCH_ANY)
continue;
if (tmp[i + 1] != cpr_vreg->pvs_version &&
tmp[i + 1] != FUSE_PARAM_MATCH_ANY)
continue;
for (j = CPR_FUSE_CORNER_MIN;
j <= cpr_vreg->num_fuse_corners; j++)
corner_max[j] = tmp[i + 2 + j - CPR_FUSE_CORNER_MIN];
match_found = true;
break;
}
kfree(tmp);
if (!match_found) {
cpr_debug(cpr_vreg, "No quotient adjustment possible for speed bin=%u, pvs version=%u\n",
cpr_vreg->speed_bin, cpr_vreg->pvs_version);
goto free_arrays;
}
/* Verify that fuse corner to max virtual corner mapping is valid. */
for (i = CPR_FUSE_CORNER_MIN; i <= highest_fuse_corner; i++) {
if (corner_max[i] < CPR_CORNER_MIN
|| corner_max[i] > cpr_vreg->num_corners) {
cpr_err(cpr_vreg, "Invalid corner=%d in qcom,cpr-speed-bin-max-corners\n",
corner_max[i]);
goto free_arrays;
}
}
/*
* Return success if the virtual corner values read from
* qcom,cpr-speed-bin-max-corners property are incorrect. This allows
* the driver to continue to run without quotient scaling.
*/
for (i = CPR_FUSE_CORNER_MIN + 1; i <= highest_fuse_corner; i++) {
if (corner_max[i] <= corner_max[i - 1]) {
cpr_err(cpr_vreg, "fuse corner=%d (%u) should be larger than the fuse corner=%d (%u)\n",
i, corner_max[i], i - 1, corner_max[i - 1]);
goto free_arrays;
}
}
prop = of_find_property(dev->of_node,
"qcom,cpr-corner-frequency-map", NULL);
if (!prop) {
cpr_debug(cpr_vreg, "qcom,cpr-corner-frequency-map missing\n");
goto free_arrays;
}
size = prop->length / sizeof(u32);
tmp = kcalloc(size, sizeof(*tmp), GFP_KERNEL);
if (!tmp) {
rc = -ENOMEM;
goto free_arrays;
}
rc = of_property_read_u32_array(dev->of_node,
"qcom,cpr-corner-frequency-map", tmp, size);
if (rc < 0) {
cpr_err(cpr_vreg,
"get cpr-corner-frequency-map failed, rc = %d\n", rc);
kfree(tmp);
goto free_arrays;
}
freq_map = kcalloc(cpr_vreg->num_corners + 1, sizeof(*freq_map),
GFP_KERNEL);
if (!freq_map) {
kfree(tmp);
rc = -ENOMEM;
goto free_arrays;
}
for (i = 0; i < size; i += 2) {
corner = tmp[i];
if ((corner < 1) || (corner > cpr_vreg->num_corners)) {
cpr_err(cpr_vreg,
"corner should be in 1~%d range: %d\n",
cpr_vreg->num_corners, corner);
continue;
}
freq_map[corner] = tmp[i + 1];
cpr_debug(cpr_vreg,
"Frequency at virtual corner %d is %d Hz.\n",
corner, freq_map[corner]);
}
kfree(tmp);
prop = of_find_property(dev->of_node,
"qcom,cpr-quot-adjust-scaling-factor-max", NULL);
if (!prop) {
cpr_debug(cpr_vreg, "qcom,cpr-quot-adjust-scaling-factor-max missing\n");
rc = 0;
goto free_arrays;
}
size = prop->length / sizeof(u32);
if ((size != 1) && (size != cpr_vreg->num_fuse_corners)) {
cpr_err(cpr_vreg, "The size of qcom,cpr-quot-adjust-scaling-factor-max should be 1 or %d\n",
cpr_vreg->num_fuse_corners);
rc = 0;
goto free_arrays;
}
max_factor = kcalloc(cpr_vreg->num_fuse_corners + 1,
sizeof(*max_factor), GFP_KERNEL);
if (!max_factor) {
rc = -ENOMEM;
goto free_arrays;
}
/*
* Leave max_factor[CPR_FUSE_CORNER_MIN ... highest_fuse_corner-1] = 0
* if cpr-quot-adjust-scaling-factor-max is a single value in order to
* maintain backward compatibility.
*/
i = (size == cpr_vreg->num_fuse_corners) ? CPR_FUSE_CORNER_MIN
: highest_fuse_corner;
rc = of_property_read_u32_array(dev->of_node,
"qcom,cpr-quot-adjust-scaling-factor-max",
&max_factor[i], size);
if (rc < 0) {
cpr_debug(cpr_vreg, "could not read qcom,cpr-quot-adjust-scaling-factor-max, rc=%d\n",
rc);
rc = 0;
goto free_arrays;
}
/*
* Get the quotient adjustment scaling factor, according to:
* scaling = min(1000 * (QUOT(corner_N) - QUOT(corner_N-1))
* / (freq(corner_N) - freq(corner_N-1)), max_factor)
*
* QUOT(corner_N): quotient read from fuse for fuse corner N
* QUOT(corner_N-1): quotient read from fuse for fuse corner (N - 1)
* freq(corner_N): max frequency in MHz supported by fuse corner N
* freq(corner_N-1): max frequency in MHz supported by fuse corner
* (N - 1)
*/
for (i = CPR_FUSE_CORNER_MIN; i <= highest_fuse_corner; i++)
freq_max[i] = freq_map[corner_max[i]];
for (i = CPR_FUSE_CORNER_MIN + 1; i <= highest_fuse_corner; i++) {
if (freq_max[i] <= freq_max[i - 1] || freq_max[i - 1] == 0) {
cpr_err(cpr_vreg, "fuse corner %d freq=%u should be larger than fuse corner %d freq=%u\n",
i, freq_max[i], i - 1, freq_max[i - 1]);
rc = -EINVAL;
goto free_arrays;
}
}
scaling = kcalloc(cpr_vreg->num_fuse_corners + 1, sizeof(*scaling),
GFP_KERNEL);
if (!scaling) {
rc = -ENOMEM;
goto free_arrays;
}
/* Convert corner max frequencies from Hz to MHz. */
for (i = CPR_FUSE_CORNER_MIN; i <= highest_fuse_corner; i++)
freq_max[i] /= 1000000;
for (i = CPR_FUSE_CORNER_MIN + 1; i <= highest_fuse_corner; i++) {
if (cpr_vreg->fuse_quot_offset &&
(cpr_vreg->cpr_fuse_ro_sel[i] !=
cpr_vreg->cpr_fuse_ro_sel[i - 1])) {
scaling[i] = 1000 * cpr_vreg->fuse_quot_offset[i]
/ (freq_max[i] - freq_max[i - 1]);
} else {
scaling[i] = 1000 * (cpr_vreg->cpr_fuse_target_quot[i]
- cpr_vreg->cpr_fuse_target_quot[i - 1])
/ (freq_max[i] - freq_max[i - 1]);
if (cpr_vreg->cpr_fuse_target_quot[i]
< cpr_vreg->cpr_fuse_target_quot[i - 1])
scaling[i] = 0;
}
scaling[i] = min(scaling[i], max_factor[i]);
cpr_info(cpr_vreg, "fuse corner %d quotient adjustment scaling factor: %d.%03d\n",
i, scaling[i] / 1000, scaling[i] % 1000);
}
/*
* Walk through the virtual corners mapped to each fuse corner
* and calculate the quotient adjustment for each one using the
* following formula:
* quot_adjust = (freq_max - freq_corner) * scaling / 1000
*
* @freq_max: max frequency in MHz supported by the fuse corner
* @freq_corner: frequency in MHz corresponding to the virtual corner
*/
for (j = CPR_FUSE_CORNER_MIN + 1; j <= highest_fuse_corner; j++) {
for (i = corner_max[j - 1] + 1; i < corner_max[j]; i++) {
freq_corner = freq_map[i] / 1000000; /* MHz */
if (freq_corner > 0) {
cpr_vreg->quot_adjust[i] = scaling[j] *
(freq_max[j] - freq_corner) / 1000;
}
}
}
rc = cpr_virtual_corner_quot_adjust(cpr_vreg, dev);
if (rc) {
cpr_err(cpr_vreg, "count not adjust virtual-corner quot rc=%d\n",
rc);
goto free_arrays;
}
for (i = CPR_CORNER_MIN; i <= cpr_vreg->num_corners; i++)
cpr_info(cpr_vreg, "adjusted quotient[%d] = %d\n", i,
cpr_vreg->cpr_fuse_target_quot[cpr_vreg->corner_map[i]]
- cpr_vreg->quot_adjust[i]);
maps_valid = true;
free_arrays:
if (!rc) {
rc = cpr_get_open_loop_voltage(cpr_vreg, dev, corner_max,
freq_map, maps_valid);
if (rc) {
cpr_err(cpr_vreg, "could not fill open loop voltage array, rc=%d\n",
rc);
goto free_arrays_1;
}
rc = cpr_virtual_corner_voltage_adjust(cpr_vreg, dev);
if (rc)
cpr_err(cpr_vreg, "count not adjust virtual-corner voltage rc=%d\n",
rc);
}
free_arrays_1:
kfree(max_factor);
kfree(scaling);
kfree(freq_map);
kfree(corner_max);
kfree(freq_max);
return rc;
}
/*
* Check if the redundant set of CPR fuses should be used in place of the
* primary set and configure the cpr_fuse_redundant element accordingly.
*/
static int cpr_check_redundant(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
u32 cpr_fuse_redun_sel[5];
int rc;
if (of_find_property(of_node, "qcom,cpr-fuse-redun-sel", NULL)) {
rc = of_property_read_u32_array(of_node,
"qcom,cpr-fuse-redun-sel", cpr_fuse_redun_sel, 5);
if (rc < 0) {
cpr_err(cpr_vreg, "qcom,cpr-fuse-redun-sel missing: rc=%d\n",
rc);
return rc;
}
cpr_vreg->cpr_fuse_redundant
= cpr_fuse_is_setting_expected(cpr_vreg,
cpr_fuse_redun_sel);
} else {
cpr_vreg->cpr_fuse_redundant = false;
}
if (cpr_vreg->cpr_fuse_redundant)
cpr_info(cpr_vreg, "using redundant fuse parameters\n");
return 0;
}
static int cpr_read_fuse_revision(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
u32 fuse_sel[4];
int rc;
if (of_find_property(of_node, "qcom,cpr-fuse-revision", NULL)) {
rc = of_property_read_u32_array(of_node,
"qcom,cpr-fuse-revision", fuse_sel, 4);
if (rc < 0) {
cpr_err(cpr_vreg, "qcom,cpr-fuse-revision read failed: rc=%d\n",
rc);
return rc;
}
cpr_vreg->cpr_fuse_revision
= cpr_read_efuse_param(cpr_vreg, fuse_sel[0],
fuse_sel[1], fuse_sel[2], fuse_sel[3]);
cpr_info(cpr_vreg, "fuse revision = %d\n",
cpr_vreg->cpr_fuse_revision);
} else {
cpr_vreg->cpr_fuse_revision = FUSE_REVISION_UNKNOWN;
}
return 0;
}
static int cpr_read_ro_select(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
int rc = 0;
u32 cpr_fuse_row[2];
char *ro_sel_str;
int *bp_ro_sel;
int i;
bp_ro_sel
= kzalloc((cpr_vreg->num_fuse_corners + 1) * sizeof(*bp_ro_sel),
GFP_KERNEL);
if (!bp_ro_sel)
return -ENOMEM;
if (cpr_vreg->cpr_fuse_redundant) {
rc = of_property_read_u32_array(of_node,
"qcom,cpr-fuse-redun-row",
cpr_fuse_row, 2);
ro_sel_str = "qcom,cpr-fuse-redun-ro-sel";
} else {
rc = of_property_read_u32_array(of_node, "qcom,cpr-fuse-row",
cpr_fuse_row, 2);
ro_sel_str = "qcom,cpr-fuse-ro-sel";
}
if (rc)
goto error;
rc = of_property_read_u32_array(of_node, ro_sel_str,
&bp_ro_sel[CPR_FUSE_CORNER_MIN], cpr_vreg->num_fuse_corners);
if (rc) {
cpr_err(cpr_vreg, "%s read error, rc=%d\n", ro_sel_str, rc);
goto error;
}
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners; i++)
cpr_vreg->cpr_fuse_ro_sel[i]
= cpr_read_efuse_param(cpr_vreg, cpr_fuse_row[0],
bp_ro_sel[i], CPR_FUSE_RO_SEL_BITS,
cpr_fuse_row[1]);
error:
kfree(bp_ro_sel);
return rc;
}
static int cpr_find_fuse_map_match(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
int i, j, rc, tuple_size;
int len = 0;
u32 *tmp, val, ro;
/* Specify default no match case. */
cpr_vreg->cpr_fuse_map_match = FUSE_MAP_NO_MATCH;
cpr_vreg->cpr_fuse_map_count = 0;
if (!of_find_property(of_node, "qcom,cpr-fuse-version-map", &len)) {
/* No mapping present. */
return 0;
}
tuple_size = cpr_vreg->num_fuse_corners + 3;
cpr_vreg->cpr_fuse_map_count = len / (sizeof(u32) * tuple_size);
if (len == 0 || len % (sizeof(u32) * tuple_size)) {
cpr_err(cpr_vreg, "qcom,cpr-fuse-version-map length=%d is invalid\n",
len);
return -EINVAL;
}
tmp = kzalloc(len, GFP_KERNEL);
if (!tmp)
return -ENOMEM;
rc = of_property_read_u32_array(of_node, "qcom,cpr-fuse-version-map",
tmp, cpr_vreg->cpr_fuse_map_count * tuple_size);
if (rc) {
cpr_err(cpr_vreg, "could not read qcom,cpr-fuse-version-map, rc=%d\n",
rc);
goto done;
}
/*
* qcom,cpr-fuse-version-map tuple format:
* <speed_bin, pvs_version, cpr_fuse_revision, ro_sel[1], ...,
* ro_sel[n]> for n == number of fuse corners
*/
for (i = 0; i < cpr_vreg->cpr_fuse_map_count; i++) {
if (tmp[i * tuple_size] != cpr_vreg->speed_bin
&& tmp[i * tuple_size] != FUSE_PARAM_MATCH_ANY)
continue;
if (tmp[i * tuple_size + 1] != cpr_vreg->pvs_version
&& tmp[i * tuple_size + 1] != FUSE_PARAM_MATCH_ANY)
continue;
if (tmp[i * tuple_size + 2] != cpr_vreg->cpr_fuse_revision
&& tmp[i * tuple_size + 2] != FUSE_PARAM_MATCH_ANY)
continue;
for (j = 0; j < cpr_vreg->num_fuse_corners; j++) {
val = tmp[i * tuple_size + 3 + j];
ro = cpr_vreg->cpr_fuse_ro_sel[j + CPR_FUSE_CORNER_MIN];
if (val != ro && val != FUSE_PARAM_MATCH_ANY)
break;
}
if (j == cpr_vreg->num_fuse_corners) {
cpr_vreg->cpr_fuse_map_match = i;
break;
}
}
if (cpr_vreg->cpr_fuse_map_match != FUSE_MAP_NO_MATCH)
cpr_debug(cpr_vreg, "qcom,cpr-fuse-version-map tuple match found: %d\n",
cpr_vreg->cpr_fuse_map_match);
else
cpr_debug(cpr_vreg, "qcom,cpr-fuse-version-map tuple match not found\n");
done:
kfree(tmp);
return rc;
}
static int cpr_minimum_quot_difference_adjustment(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
int tuple_count, tuple_match;
int rc, i, len = 0;
u32 index, adjust_quot = 0;
u32 *min_diff_quot;
if (!of_find_property(of_node, "qcom,cpr-fuse-min-quot-diff", NULL))
/* No conditional adjustment needed on revised quotients. */
return 0;
if (!of_find_property(of_node, "qcom,cpr-min-quot-diff-adjustment",
&len)) {
cpr_err(cpr_vreg, "qcom,cpr-min-quot-diff-adjustment not specified\n");
return -ENODEV;
}
if (cpr_vreg->cpr_fuse_map_count) {
if (cpr_vreg->cpr_fuse_map_match == FUSE_MAP_NO_MATCH)
/* No matching index to use for quotient adjustment. */
return 0;
tuple_count = cpr_vreg->cpr_fuse_map_count;
tuple_match = cpr_vreg->cpr_fuse_map_match;
} else {
tuple_count = 1;
tuple_match = 0;
}
if (len != cpr_vreg->num_fuse_corners * tuple_count * sizeof(u32)) {
cpr_err(cpr_vreg, "qcom,cpr-min-quot-diff-adjustment length=%d is invalid\n",
len);
return -EINVAL;
}
min_diff_quot = kcalloc(cpr_vreg->num_fuse_corners,
sizeof(*min_diff_quot), GFP_KERNEL);
if (!min_diff_quot)
return -ENOMEM;
rc = of_property_read_u32_array(of_node, "qcom,cpr-fuse-min-quot-diff",
min_diff_quot,
cpr_vreg->num_fuse_corners);
if (rc < 0) {
cpr_err(cpr_vreg, "qcom,cpr-fuse-min-quot-diff reading failed, rc = %d\n",
rc);
goto error;
}
for (i = CPR_FUSE_CORNER_MIN + 1;
i <= cpr_vreg->num_fuse_corners; i++) {
if ((cpr_vreg->cpr_fuse_target_quot[i]
- cpr_vreg->cpr_fuse_target_quot[i - 1])
<= (int)min_diff_quot[i - CPR_FUSE_CORNER_MIN]) {
index = tuple_match * cpr_vreg->num_fuse_corners
+ i - CPR_FUSE_CORNER_MIN;
rc = of_property_read_u32_index(of_node,
"qcom,cpr-min-quot-diff-adjustment",
index, &adjust_quot);
if (rc) {
cpr_err(cpr_vreg, "could not read qcom,cpr-min-quot-diff-adjustment index %u, rc=%d\n",
index, rc);
goto error;
}
cpr_vreg->cpr_fuse_target_quot[i]
= cpr_vreg->cpr_fuse_target_quot[i - 1]
+ adjust_quot;
cpr_info(cpr_vreg, "Corner[%d]: revised adjusted quotient = %d\n",
i, cpr_vreg->cpr_fuse_target_quot[i]);
};
}
error:
kfree(min_diff_quot);
return rc;
}
static int cpr_adjust_target_quots(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
int tuple_count, tuple_match, i;
u32 index;
u32 quot_adjust = 0;
int len = 0;
int rc = 0;
if (!of_find_property(of_node, "qcom,cpr-quotient-adjustment", &len)) {
/* No static quotient adjustment needed. */
return 0;
}
if (cpr_vreg->cpr_fuse_map_count) {
if (cpr_vreg->cpr_fuse_map_match == FUSE_MAP_NO_MATCH) {
/* No matching index to use for quotient adjustment. */
return 0;
}
tuple_count = cpr_vreg->cpr_fuse_map_count;
tuple_match = cpr_vreg->cpr_fuse_map_match;
} else {
tuple_count = 1;
tuple_match = 0;
}
if (len != cpr_vreg->num_fuse_corners * tuple_count * sizeof(u32)) {
cpr_err(cpr_vreg, "qcom,cpr-quotient-adjustment length=%d is invalid\n",
len);
return -EINVAL;
}
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners; i++) {
index = tuple_match * cpr_vreg->num_fuse_corners
+ i - CPR_FUSE_CORNER_MIN;
rc = of_property_read_u32_index(of_node,
"qcom,cpr-quotient-adjustment", index, &quot_adjust);
if (rc) {
cpr_err(cpr_vreg, "could not read qcom,cpr-quotient-adjustment index %u, rc=%d\n",
index, rc);
return rc;
}
if (quot_adjust) {
cpr_vreg->cpr_fuse_target_quot[i] += quot_adjust;
cpr_info(cpr_vreg, "Corner[%d]: adjusted target quot = %d\n",
i, cpr_vreg->cpr_fuse_target_quot[i]);
}
}
rc = cpr_minimum_quot_difference_adjustment(pdev, cpr_vreg);
if (rc)
cpr_err(cpr_vreg, "failed to apply minimum quot difference rc=%d\n",
rc);
return rc;
}
static int cpr_check_allowed(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
char *allow_str = "qcom,cpr-allowed";
int rc = 0, count;
int tuple_count, tuple_match;
u32 allow_status;
if (!of_find_property(of_node, allow_str, &count))
/* CPR is allowed for all fuse revisions. */
return 0;
count /= sizeof(u32);
if (cpr_vreg->cpr_fuse_map_count) {
if (cpr_vreg->cpr_fuse_map_match == FUSE_MAP_NO_MATCH)
/* No matching index to use for CPR allowed. */
return 0;
tuple_count = cpr_vreg->cpr_fuse_map_count;
tuple_match = cpr_vreg->cpr_fuse_map_match;
} else {
tuple_count = 1;
tuple_match = 0;
}
if (count != tuple_count) {
cpr_err(cpr_vreg, "%s count=%d is invalid\n", allow_str,
count);
return -EINVAL;
}
rc = of_property_read_u32_index(of_node, allow_str, tuple_match,
&allow_status);
if (rc) {
cpr_err(cpr_vreg, "could not read %s index %u, rc=%d\n",
allow_str, tuple_match, rc);
return rc;
}
if (allow_status && !cpr_vreg->cpr_fuse_disable)
cpr_vreg->cpr_fuse_disable = false;
else
cpr_vreg->cpr_fuse_disable = true;
cpr_info(cpr_vreg, "CPR closed loop is %s for fuse revision %d\n",
cpr_vreg->cpr_fuse_disable ? "disabled" : "enabled",
cpr_vreg->cpr_fuse_revision);
return rc;
}
static int cpr_check_de_aging_allowed(struct cpr_regulator *cpr_vreg,
struct device *dev)
{
struct device_node *of_node = dev->of_node;
char *allow_str = "qcom,cpr-de-aging-allowed";
int rc = 0, count;
int tuple_count, tuple_match;
u32 allow_status = 0;
if (!of_find_property(of_node, allow_str, &count)) {
/* CPR de-aging is not allowed for all fuse revisions. */
return allow_status;
}
count /= sizeof(u32);
if (cpr_vreg->cpr_fuse_map_count) {
if (cpr_vreg->cpr_fuse_map_match == FUSE_MAP_NO_MATCH)
/* No matching index to use for CPR de-aging allowed. */
return 0;
tuple_count = cpr_vreg->cpr_fuse_map_count;
tuple_match = cpr_vreg->cpr_fuse_map_match;
} else {
tuple_count = 1;
tuple_match = 0;
}
if (count != tuple_count) {
cpr_err(cpr_vreg, "%s count=%d is invalid\n", allow_str,
count);
return -EINVAL;
}
rc = of_property_read_u32_index(of_node, allow_str, tuple_match,
&allow_status);
if (rc) {
cpr_err(cpr_vreg, "could not read %s index %u, rc=%d\n",
allow_str, tuple_match, rc);
return rc;
}
cpr_info(cpr_vreg, "CPR de-aging is %s for fuse revision %d\n",
allow_status ? "allowed" : "not allowed",
cpr_vreg->cpr_fuse_revision);
return allow_status;
}
static int cpr_aging_init(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
struct cpr_aging_info *aging_info;
struct cpr_aging_sensor_info *sensor_info;
int num_fuse_corners = cpr_vreg->num_fuse_corners;
int i, rc = 0, len = 0, num_aging_sensors, ro_sel, bits;
u32 *aging_sensor_id, *fuse_sel, *fuse_sel_orig;
u32 sensor = 0, non_collapsible_sensor_mask = 0;
u64 efuse_val;
struct property *prop;
if (!of_find_property(of_node, "qcom,cpr-aging-sensor-id", &len)) {
/* No CPR de-aging adjustments needed */
return 0;
}
if (len == 0) {
cpr_err(cpr_vreg, "qcom,cpr-aging-sensor-id property format is invalid\n");
return -EINVAL;
}
num_aging_sensors = len / sizeof(u32);
cpr_debug(cpr_vreg, "No of aging sensors = %d\n", num_aging_sensors);
if (cpumask_empty(&cpr_vreg->cpu_mask)) {
cpr_err(cpr_vreg, "qcom,cpr-cpus property missing\n");
return -EINVAL;
}
rc = cpr_check_de_aging_allowed(cpr_vreg, &pdev->dev);
if (rc < 0) {
cpr_err(cpr_vreg, "cpr_check_de_aging_allowed failed: rc=%d\n",
rc);
return rc;
} else if (rc == 0) {
/* CPR de-aging is not allowed for the current fuse combo */
return 0;
}
aging_info = devm_kzalloc(&pdev->dev, sizeof(*aging_info),
GFP_KERNEL);
if (!aging_info)
return -ENOMEM;
cpr_vreg->aging_info = aging_info;
aging_info->num_aging_sensors = num_aging_sensors;
rc = of_property_read_u32(of_node, "qcom,cpr-aging-ref-corner",
&aging_info->aging_corner);
if (rc) {
cpr_err(cpr_vreg, "qcom,cpr-aging-ref-corner missing rc=%d\n",
rc);
return rc;
}
CPR_PROP_READ_U32(cpr_vreg, of_node, "cpr-aging-ref-voltage",
&aging_info->aging_ref_voltage, rc);
if (rc)
return rc;
CPR_PROP_READ_U32(cpr_vreg, of_node, "cpr-max-aging-margin",
&aging_info->max_aging_margin, rc);
if (rc)
return rc;
CPR_PROP_READ_U32(cpr_vreg, of_node, "cpr-aging-ro-scaling-factor",
&aging_info->aging_ro_kv, rc);
if (rc)
return rc;
/* Check for DIV by 0 error */
if (aging_info->aging_ro_kv == 0) {
cpr_err(cpr_vreg, "invalid cpr-aging-ro-scaling-factor value: %u\n",
aging_info->aging_ro_kv);
return -EINVAL;
}
rc = of_property_read_u32_array(of_node, "qcom,cpr-ro-scaling-factor",
aging_info->cpr_ro_kv, CPR_NUM_RING_OSC);
if (rc) {
cpr_err(cpr_vreg, "qcom,cpr-ro-scaling-factor property read failed, rc = %d\n",
rc);
return rc;
}
if (of_find_property(of_node, "qcom,cpr-non-collapsible-sensors",
&len)) {
len = len / sizeof(u32);
if (len <= 0 || len > 32) {
cpr_err(cpr_vreg, "qcom,cpr-non-collapsible-sensors has an incorrect size\n");
return -EINVAL;
}
for (i = 0; i < len; i++) {
rc = of_property_read_u32_index(of_node,
"qcom,cpr-non-collapsible-sensors",
i, &sensor);
if (rc) {
cpr_err(cpr_vreg, "could not read qcom,cpr-non-collapsible-sensors index %u, rc=%d\n",
i, rc);
return rc;
}
if (sensor > 31) {
cpr_err(cpr_vreg, "invalid non-collapsible sensor = %u\n",
sensor);
return -EINVAL;
}
non_collapsible_sensor_mask |= BIT(sensor);
}
/*
* Bypass the sensors in collapsible domain for
* de-aging measurements
*/
aging_info->aging_sensor_bypass =
~(non_collapsible_sensor_mask);
cpr_debug(cpr_vreg, "sensor bypass mask for aging = 0x%08x\n",
aging_info->aging_sensor_bypass);
}
prop = of_find_property(pdev->dev.of_node, "qcom,cpr-aging-derate",
NULL);
if ((!prop) ||
(prop->length != num_fuse_corners * sizeof(u32))) {
cpr_err(cpr_vreg, "qcom,cpr-aging-derate incorrectly configured\n");
return -EINVAL;
}
aging_sensor_id = kcalloc(num_aging_sensors, sizeof(*aging_sensor_id),
GFP_KERNEL);
fuse_sel = kcalloc(num_aging_sensors * 4, sizeof(*fuse_sel),
GFP_KERNEL);
aging_info->voltage_adjust = devm_kcalloc(&pdev->dev,
num_fuse_corners + 1,
sizeof(*aging_info->voltage_adjust),
GFP_KERNEL);
aging_info->sensor_info = devm_kcalloc(&pdev->dev, num_aging_sensors,
sizeof(*aging_info->sensor_info),
GFP_KERNEL);
aging_info->aging_derate = devm_kcalloc(&pdev->dev,
num_fuse_corners + 1,
sizeof(*aging_info->aging_derate),
GFP_KERNEL);
if (!aging_info->aging_derate || !aging_sensor_id
|| !aging_info->sensor_info || !fuse_sel
|| !aging_info->voltage_adjust)
goto err;
rc = of_property_read_u32_array(of_node, "qcom,cpr-aging-sensor-id",
aging_sensor_id, num_aging_sensors);
if (rc) {
cpr_err(cpr_vreg, "qcom,cpr-aging-sensor-id property read failed, rc = %d\n",
rc);
goto err;
}
for (i = 0; i < num_aging_sensors; i++)
if (aging_sensor_id[i] < 0 || aging_sensor_id[i] > 31) {
cpr_err(cpr_vreg, "Invalid aging sensor id: %u\n",
aging_sensor_id[i]);
rc = -EINVAL;
goto err;
}
rc = of_property_read_u32_array(of_node, "qcom,cpr-aging-derate",
&aging_info->aging_derate[CPR_FUSE_CORNER_MIN],
num_fuse_corners);
if (rc) {
cpr_err(cpr_vreg, "qcom,cpr-aging-derate property read failed, rc = %d\n",
rc);
goto err;
}
rc = of_property_read_u32_array(of_node,
"qcom,cpr-fuse-aging-init-quot-diff",
fuse_sel, (num_aging_sensors * 4));
if (rc) {
cpr_err(cpr_vreg, "qcom,cpr-fuse-aging-init-quot-diff read failed, rc = %d\n",
rc);
goto err;
}
fuse_sel_orig = fuse_sel;
sensor_info = aging_info->sensor_info;
for (i = 0; i < num_aging_sensors; i++, sensor_info++) {
sensor_info->sensor_id = aging_sensor_id[i];
efuse_val = cpr_read_efuse_param(cpr_vreg, fuse_sel[0],
fuse_sel[1], fuse_sel[2], fuse_sel[3]);
bits = fuse_sel[2];
sensor_info->initial_quot_diff = ((efuse_val & BIT(bits - 1)) ?
-1 : 1) * (efuse_val & (BIT(bits - 1) - 1));
cpr_debug(cpr_vreg, "Age sensor[%d] Initial quot diff = %d\n",
sensor_info->sensor_id,
sensor_info->initial_quot_diff);
fuse_sel += 4;
}
/*
* Add max aging margin here. This can be adjusted later in
* de-aging algorithm.
*/
for (i = CPR_FUSE_CORNER_MIN; i <= num_fuse_corners; i++) {
ro_sel = cpr_vreg->cpr_fuse_ro_sel[i];
cpr_vreg->cpr_fuse_target_quot[i] +=
(aging_info->cpr_ro_kv[ro_sel]
* aging_info->max_aging_margin) / 1000000;
aging_info->voltage_adjust[i] = aging_info->max_aging_margin;
cpr_info(cpr_vreg, "Corner[%d]: age margin adjusted quotient = %d\n",
i, cpr_vreg->cpr_fuse_target_quot[i]);
}
kfree(fuse_sel_orig);
err:
kfree(aging_sensor_id);
return rc;
}
static int cpr_cpu_map_init(struct cpr_regulator *cpr_vreg, struct device *dev)
{
struct device_node *cpu_node;
int i, cpu;
if (!of_find_property(dev->of_node, "qcom,cpr-cpus",
&cpr_vreg->num_adj_cpus)) {
/* No adjustments based on online cores */
return 0;
}
cpr_vreg->num_adj_cpus /= sizeof(u32);
cpr_vreg->adj_cpus = devm_kcalloc(dev, cpr_vreg->num_adj_cpus,
sizeof(int), GFP_KERNEL);
if (!cpr_vreg->adj_cpus)
return -ENOMEM;
for (i = 0; i < cpr_vreg->num_adj_cpus; i++) {
cpu_node = of_parse_phandle(dev->of_node, "qcom,cpr-cpus", i);
if (!cpu_node) {
cpr_err(cpr_vreg, "could not find CPU node %d\n", i);
return -EINVAL;
}
cpr_vreg->adj_cpus[i] = -1;
for_each_possible_cpu(cpu) {
if (of_get_cpu_node(cpu, NULL) == cpu_node) {
cpr_vreg->adj_cpus[i] = cpu;
cpumask_set_cpu(cpu, &cpr_vreg->cpu_mask);
break;
}
}
of_node_put(cpu_node);
}
return 0;
}
static int cpr_init_cpr_efuse(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
int i, rc = 0;
bool scheme_fuse_valid = false;
bool disable_fuse_valid = false;
char *targ_quot_str;
u32 cpr_fuse_row[2];
u32 bp_cpr_disable, bp_scheme;
size_t len;
int *bp_target_quot;
u64 fuse_bits, fuse_bits_2;
u32 *target_quot_size;
struct cpr_quot_scale *quot_scale;
len = cpr_vreg->num_fuse_corners + 1;
bp_target_quot = kcalloc(len, sizeof(*bp_target_quot), GFP_KERNEL);
target_quot_size = kcalloc(len, sizeof(*target_quot_size), GFP_KERNEL);
quot_scale = kcalloc(len, sizeof(*quot_scale), GFP_KERNEL);
if (!bp_target_quot || !target_quot_size || !quot_scale) {
rc = -ENOMEM;
goto error;
}
if (cpr_vreg->cpr_fuse_redundant) {
rc = of_property_read_u32_array(of_node,
"qcom,cpr-fuse-redun-row",
cpr_fuse_row, 2);
targ_quot_str = "qcom,cpr-fuse-redun-target-quot";
} else {
rc = of_property_read_u32_array(of_node, "qcom,cpr-fuse-row",
cpr_fuse_row, 2);
targ_quot_str = "qcom,cpr-fuse-target-quot";
}
if (rc)
goto error;
rc = of_property_read_u32_array(of_node, targ_quot_str,
&bp_target_quot[CPR_FUSE_CORNER_MIN],
cpr_vreg->num_fuse_corners);
if (rc < 0) {
cpr_err(cpr_vreg, "missing %s: rc=%d\n", targ_quot_str, rc);
goto error;
}
if (of_find_property(of_node, "qcom,cpr-fuse-target-quot-size", NULL)) {
rc = of_property_read_u32_array(of_node,
"qcom,cpr-fuse-target-quot-size",
&target_quot_size[CPR_FUSE_CORNER_MIN],
cpr_vreg->num_fuse_corners);
if (rc < 0) {
cpr_err(cpr_vreg, "error while reading qcom,cpr-fuse-target-quot-size: rc=%d\n",
rc);
goto error;
}
} else {
/*
* Default fuse quotient parameter size to match target register
* size.
*/
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners;
i++)
target_quot_size[i] = CPR_FUSE_TARGET_QUOT_BITS;
}
if (of_find_property(of_node, "qcom,cpr-fuse-target-quot-scale",
NULL)) {
for (i = 0; i < cpr_vreg->num_fuse_corners; i++) {
rc = of_property_read_u32_index(of_node,
"qcom,cpr-fuse-target-quot-scale", i * 2,
&quot_scale[i + CPR_FUSE_CORNER_MIN].offset);
if (rc < 0) {
cpr_err(cpr_vreg, "error while reading qcom,cpr-fuse-target-quot-scale: rc=%d\n",
rc);
goto error;
}
rc = of_property_read_u32_index(of_node,
"qcom,cpr-fuse-target-quot-scale", i * 2 + 1,
&quot_scale[i + CPR_FUSE_CORNER_MIN].multiplier);
if (rc < 0) {
cpr_err(cpr_vreg, "error while reading qcom,cpr-fuse-target-quot-scale: rc=%d\n",
rc);
goto error;
}
}
} else {
/*
* In the default case, target quotients require no scaling so
* use offset = 0, multiplier = 1.
*/
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners;
i++) {
quot_scale[i].offset = 0;
quot_scale[i].multiplier = 1;
}
}
/* Read the control bits of eFuse */
fuse_bits = cpr_read_efuse_row(cpr_vreg, cpr_fuse_row[0],
cpr_fuse_row[1]);
cpr_info(cpr_vreg, "[row:%d] = 0x%llx\n", cpr_fuse_row[0], fuse_bits);
if (cpr_vreg->cpr_fuse_redundant) {
if (of_find_property(of_node,
"qcom,cpr-fuse-redun-bp-cpr-disable", NULL)) {
CPR_PROP_READ_U32(cpr_vreg, of_node,
"cpr-fuse-redun-bp-cpr-disable",
&bp_cpr_disable, rc);
disable_fuse_valid = true;
if (of_find_property(of_node,
"qcom,cpr-fuse-redun-bp-scheme",
NULL)) {
CPR_PROP_READ_U32(cpr_vreg, of_node,
"cpr-fuse-redun-bp-scheme",
&bp_scheme, rc);
scheme_fuse_valid = true;
}
if (rc)
goto error;
fuse_bits_2 = fuse_bits;
} else {
u32 temp_row[2];
/* Use original fuse if no optional property */
if (of_find_property(of_node,
"qcom,cpr-fuse-bp-cpr-disable", NULL)) {
CPR_PROP_READ_U32(cpr_vreg, of_node,
"cpr-fuse-bp-cpr-disable",
&bp_cpr_disable, rc);
disable_fuse_valid = true;
}
if (of_find_property(of_node,
"qcom,cpr-fuse-bp-scheme",
NULL)) {
CPR_PROP_READ_U32(cpr_vreg, of_node,
"cpr-fuse-bp-scheme",
&bp_scheme, rc);
scheme_fuse_valid = true;
}
rc = of_property_read_u32_array(of_node,
"qcom,cpr-fuse-row",
temp_row, 2);
if (rc)
goto error;
fuse_bits_2 = cpr_read_efuse_row(cpr_vreg, temp_row[0],
temp_row[1]);
cpr_info(cpr_vreg, "[original row:%d] = 0x%llx\n",
temp_row[0], fuse_bits_2);
}
} else {
if (of_find_property(of_node, "qcom,cpr-fuse-bp-cpr-disable",
NULL)) {
CPR_PROP_READ_U32(cpr_vreg, of_node,
"cpr-fuse-bp-cpr-disable", &bp_cpr_disable, rc);
disable_fuse_valid = true;
}
if (of_find_property(of_node, "qcom,cpr-fuse-bp-scheme",
NULL)) {
CPR_PROP_READ_U32(cpr_vreg, of_node,
"cpr-fuse-bp-scheme", &bp_scheme, rc);
scheme_fuse_valid = true;
}
if (rc)
goto error;
fuse_bits_2 = fuse_bits;
}
if (disable_fuse_valid) {
cpr_vreg->cpr_fuse_disable =
(fuse_bits_2 >> bp_cpr_disable) & 0x01;
cpr_info(cpr_vreg, "CPR disable fuse = %d\n",
cpr_vreg->cpr_fuse_disable);
} else {
cpr_vreg->cpr_fuse_disable = false;
}
if (scheme_fuse_valid) {
cpr_vreg->cpr_fuse_local = (fuse_bits_2 >> bp_scheme) & 0x01;
cpr_info(cpr_vreg, "local = %d\n", cpr_vreg->cpr_fuse_local);
} else {
cpr_vreg->cpr_fuse_local = true;
}
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners; i++) {
cpr_vreg->cpr_fuse_target_quot[i]
= cpr_read_efuse_param(cpr_vreg, cpr_fuse_row[0],
bp_target_quot[i], target_quot_size[i],
cpr_fuse_row[1]);
/* Unpack the target quotient by scaling. */
cpr_vreg->cpr_fuse_target_quot[i] *= quot_scale[i].multiplier;
cpr_vreg->cpr_fuse_target_quot[i] += quot_scale[i].offset;
cpr_info(cpr_vreg,
"Corner[%d]: ro_sel = %d, target quot = %d\n", i,
cpr_vreg->cpr_fuse_ro_sel[i],
cpr_vreg->cpr_fuse_target_quot[i]);
}
rc = cpr_cpu_map_init(cpr_vreg, &pdev->dev);
if (rc) {
cpr_err(cpr_vreg, "CPR cpu map init failed: rc=%d\n", rc);
goto error;
}
rc = cpr_aging_init(pdev, cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "CPR aging init failed: rc=%d\n", rc);
goto error;
}
rc = cpr_adjust_target_quots(pdev, cpr_vreg);
if (rc)
goto error;
for (i = CPR_FUSE_CORNER_MIN + 1;
i <= cpr_vreg->num_fuse_corners; i++) {
if (cpr_vreg->cpr_fuse_target_quot[i]
< cpr_vreg->cpr_fuse_target_quot[i - 1] &&
cpr_vreg->cpr_fuse_ro_sel[i] ==
cpr_vreg->cpr_fuse_ro_sel[i - 1]) {
cpr_vreg->cpr_fuse_disable = true;
cpr_err(cpr_vreg, "invalid quotient values; permanently disabling CPR\n");
}
}
if (cpr_vreg->flags & FLAGS_UPLIFT_QUOT_VOLT) {
cpr_voltage_uplift_wa_inc_quot(cpr_vreg, of_node);
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners;
i++) {
cpr_info(cpr_vreg,
"Corner[%d]: uplifted target quot = %d\n",
i, cpr_vreg->cpr_fuse_target_quot[i]);
}
}
/*
* Check whether the fuse-quot-offset is defined per fuse corner.
* If it is defined, use it (quot_offset) in the calculation
* below for obtaining scaling factor per fuse corner.
*/
rc = cpr_get_fuse_quot_offset(cpr_vreg, pdev, quot_scale);
if (rc < 0)
goto error;
rc = cpr_get_corner_quot_adjustment(cpr_vreg, &pdev->dev);
if (rc)
goto error;
cpr_vreg->cpr_fuse_bits = fuse_bits;
if (!cpr_vreg->cpr_fuse_bits) {
cpr_vreg->cpr_fuse_disable = true;
cpr_err(cpr_vreg,
"cpr_fuse_bits == 0; permanently disabling CPR\n");
} else if (!cpr_vreg->fuse_quot_offset) {
/*
* Check if the target quotients for the highest two fuse
* corners are too close together.
*/
int *quot = cpr_vreg->cpr_fuse_target_quot;
int highest_fuse_corner = cpr_vreg->num_fuse_corners;
u32 min_diff_quot;
bool valid_fuse = true;
min_diff_quot = CPR_FUSE_MIN_QUOT_DIFF;
of_property_read_u32(of_node, "qcom,cpr-quot-min-diff",
&min_diff_quot);
if (quot[highest_fuse_corner] > quot[highest_fuse_corner - 1]) {
if ((quot[highest_fuse_corner]
- quot[highest_fuse_corner - 1])
<= min_diff_quot)
valid_fuse = false;
} else {
valid_fuse = false;
}
if (!valid_fuse) {
cpr_vreg->cpr_fuse_disable = true;
cpr_err(cpr_vreg, "invalid quotient values; permanently disabling CPR\n");
}
}
rc = cpr_check_allowed(pdev, cpr_vreg);
error:
kfree(bp_target_quot);
kfree(target_quot_size);
kfree(quot_scale);
return rc;
}
static int cpr_init_cpr_voltages(struct cpr_regulator *cpr_vreg,
struct device *dev)
{
int i;
int size = cpr_vreg->num_corners + 1;
cpr_vreg->last_volt = devm_kzalloc(dev, sizeof(int) * size, GFP_KERNEL);
if (!cpr_vreg->last_volt)
return -EINVAL;
for (i = CPR_CORNER_MIN; i <= cpr_vreg->num_corners; i++)
cpr_vreg->last_volt[i] = cpr_vreg->open_loop_volt[i];
return 0;
}
/*
* This function fills the virtual_limit array with voltages read from the
* prop_name device tree property if a given tuple in the property matches
* the speedbin and PVS version fuses found on the chip. Otherwise,
* it fills the virtual_limit_array with corresponding values from the
* fuse_limit_array.
*/
static int cpr_fill_override_voltage(struct cpr_regulator *cpr_vreg,
struct device *dev, const char *prop_name, const char *label,
int *virtual_limit, int *fuse_limit)
{
int rc = 0;
int i, j, size, pos;
struct property *prop;
bool match_found = false;
size_t buflen;
char *buf;
u32 *tmp;
prop = of_find_property(dev->of_node, prop_name, NULL);
if (!prop)
goto use_fuse_corner_limits;
size = prop->length / sizeof(u32);
if (size == 0 || size % (cpr_vreg->num_corners + 2)) {
cpr_err(cpr_vreg, "%s property format is invalid; reusing per-fuse-corner limits\n",
prop_name);
goto use_fuse_corner_limits;
}
tmp = kcalloc(size, sizeof(*tmp), GFP_KERNEL);
if (!tmp)
return -ENOMEM;
rc = of_property_read_u32_array(dev->of_node, prop_name, tmp, size);
if (rc < 0) {
kfree(tmp);
cpr_err(cpr_vreg, "%s reading failed, rc = %d\n", prop_name,
rc);
return rc;
}
/*
* Get limit voltage for each virtual corner based upon the speed_bin
* and pvs_version values.
*/
for (i = 0; i < size; i += cpr_vreg->num_corners + 2) {
if (tmp[i] != cpr_vreg->speed_bin &&
tmp[i] != FUSE_PARAM_MATCH_ANY)
continue;
if (tmp[i + 1] != cpr_vreg->pvs_version &&
tmp[i + 1] != FUSE_PARAM_MATCH_ANY)
continue;
for (j = CPR_CORNER_MIN; j <= cpr_vreg->num_corners; j++)
virtual_limit[j] = tmp[i + 2 + j - CPR_FUSE_CORNER_MIN];
match_found = true;
break;
}
kfree(tmp);
if (!match_found)
goto use_fuse_corner_limits;
/*
* Log per-virtual-corner voltage limits since they are useful for
* baseline CPR debugging.
*/
buflen = cpr_vreg->num_corners * (MAX_CHARS_PER_INT + 2) * sizeof(*buf);
buf = kzalloc(buflen, GFP_KERNEL);
if (buf == NULL) {
cpr_err(cpr_vreg, "Could not allocate memory for corner limit voltage logging\n");
return 0;
}
for (i = CPR_CORNER_MIN, pos = 0; i <= cpr_vreg->num_corners; i++)
pos += scnprintf(buf + pos, buflen - pos, "%d%s",
virtual_limit[i], i < cpr_vreg->num_corners ? " " : "");
cpr_info(cpr_vreg, "%s override voltage: [%s] uV\n", label, buf);
kfree(buf);
return rc;
use_fuse_corner_limits:
for (i = CPR_CORNER_MIN; i <= cpr_vreg->num_corners; i++)
virtual_limit[i] = fuse_limit[cpr_vreg->corner_map[i]];
return rc;
}
/*
* This function loads per-virtual-corner ceiling and floor voltages from device
* tree if their respective device tree properties are present. These limits
* override those found in the per-fuse-corner arrays fuse_ceiling_volt and
* fuse_floor_volt.
*/
static int cpr_init_ceiling_floor_override_voltages(
struct cpr_regulator *cpr_vreg, struct device *dev)
{
int rc, i;
int size = cpr_vreg->num_corners + 1;
cpr_vreg->ceiling_volt = devm_kzalloc(dev, sizeof(int) * size,
GFP_KERNEL);
cpr_vreg->floor_volt = devm_kzalloc(dev, sizeof(int) * size,
GFP_KERNEL);
cpr_vreg->cpr_max_ceiling = devm_kzalloc(dev, sizeof(int) * size,
GFP_KERNEL);
if (!cpr_vreg->ceiling_volt || !cpr_vreg->floor_volt ||
!cpr_vreg->cpr_max_ceiling)
return -ENOMEM;
rc = cpr_fill_override_voltage(cpr_vreg, dev,
"qcom,cpr-voltage-ceiling-override", "ceiling",
cpr_vreg->ceiling_volt, cpr_vreg->fuse_ceiling_volt);
if (rc)
return rc;
rc = cpr_fill_override_voltage(cpr_vreg, dev,
"qcom,cpr-voltage-floor-override", "floor",
cpr_vreg->floor_volt, cpr_vreg->fuse_floor_volt);
if (rc)
return rc;
for (i = CPR_CORNER_MIN; i <= cpr_vreg->num_corners; i++) {
if (cpr_vreg->floor_volt[i] > cpr_vreg->ceiling_volt[i]) {
cpr_err(cpr_vreg, "virtual corner %d floor=%d uV > ceiling=%d uV\n",
i, cpr_vreg->floor_volt[i],
cpr_vreg->ceiling_volt[i]);
return -EINVAL;
}
if (cpr_vreg->ceiling_max < cpr_vreg->ceiling_volt[i])
cpr_vreg->ceiling_max = cpr_vreg->ceiling_volt[i];
cpr_vreg->cpr_max_ceiling[i] = cpr_vreg->ceiling_volt[i];
}
return rc;
}
/*
* This function computes the per-virtual-corner floor voltages from
* per-virtual-corner ceiling voltages with an offset specified by a
* device-tree property. This must be called after open-loop voltage
* scaling, floor_volt array loading and the ceiling voltage is
* conditionally reduced to the open-loop voltage. It selects the
* maximum value between the calculated floor voltage values and
* the floor_volt array values and stores them in the floor_volt array.
*/
static int cpr_init_floor_to_ceiling_range(
struct cpr_regulator *cpr_vreg, struct device *dev)
{
int rc, i, tuple_count, tuple_match, len, pos;
u32 index, floor_volt_adjust = 0;
char *prop_str, *buf;
size_t buflen;
prop_str = "qcom,cpr-floor-to-ceiling-max-range";
if (!of_find_property(dev->of_node, prop_str, &len))
return 0;
if (cpr_vreg->cpr_fuse_map_count) {
if (cpr_vreg->cpr_fuse_map_match == FUSE_MAP_NO_MATCH) {
/*
* No matching index to use for floor-to-ceiling
* max range.
*/
return 0;
}
tuple_count = cpr_vreg->cpr_fuse_map_count;
tuple_match = cpr_vreg->cpr_fuse_map_match;
} else {
tuple_count = 1;
tuple_match = 0;
}
if (len != cpr_vreg->num_corners * tuple_count * sizeof(u32)) {
cpr_err(cpr_vreg, "%s length=%d is invalid\n", prop_str, len);
return -EINVAL;
}
for (i = CPR_CORNER_MIN; i <= cpr_vreg->num_corners; i++) {
index = tuple_match * cpr_vreg->num_corners
+ i - CPR_CORNER_MIN;
rc = of_property_read_u32_index(dev->of_node, prop_str,
index, &floor_volt_adjust);
if (rc) {
cpr_err(cpr_vreg, "could not read %s index %u, rc=%d\n",
prop_str, index, rc);
return rc;
}
if ((int)floor_volt_adjust >= 0) {
cpr_vreg->floor_volt[i] = max(cpr_vreg->floor_volt[i],
(cpr_vreg->ceiling_volt[i]
- (int)floor_volt_adjust));
cpr_vreg->floor_volt[i]
= DIV_ROUND_UP(cpr_vreg->floor_volt[i],
cpr_vreg->step_volt) *
cpr_vreg->step_volt;
if (cpr_vreg->open_loop_volt[i]
< cpr_vreg->floor_volt[i])
cpr_vreg->open_loop_volt[i]
= cpr_vreg->floor_volt[i];
}
}
/*
* Log per-virtual-corner voltage limits resulted after considering the
* floor-to-ceiling max range since they are useful for baseline CPR
* debugging.
*/
buflen = cpr_vreg->num_corners * (MAX_CHARS_PER_INT + 2) * sizeof(*buf);
buf = kzalloc(buflen, GFP_KERNEL);
if (buf == NULL) {
cpr_err(cpr_vreg, "Could not allocate memory for corner limit voltage logging\n");
return 0;
}
for (i = CPR_CORNER_MIN, pos = 0; i <= cpr_vreg->num_corners; i++)
pos += scnprintf(buf + pos, buflen - pos, "%d%s",
cpr_vreg->floor_volt[i],
i < cpr_vreg->num_corners ? " " : "");
cpr_info(cpr_vreg, "Final floor override voltages: [%s] uV\n", buf);
kfree(buf);
return 0;
}
static int cpr_init_step_quotient(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
int len = 0;
u32 step_quot[CPR_NUM_RING_OSC];
int i, rc;
if (!of_find_property(of_node, "qcom,cpr-step-quotient", &len)) {
cpr_err(cpr_vreg, "qcom,cpr-step-quotient property missing\n");
return -EINVAL;
}
if (len == sizeof(u32)) {
/* Single step quotient used for all ring oscillators. */
rc = of_property_read_u32(of_node, "qcom,cpr-step-quotient",
step_quot);
if (rc) {
cpr_err(cpr_vreg, "could not read qcom,cpr-step-quotient, rc=%d\n",
rc);
return rc;
}
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners;
i++)
cpr_vreg->step_quotient[i] = step_quot[0];
} else if (len == sizeof(u32) * CPR_NUM_RING_OSC) {
/* Unique step quotient used per ring oscillator. */
rc = of_property_read_u32_array(of_node,
"qcom,cpr-step-quotient", step_quot, CPR_NUM_RING_OSC);
if (rc) {
cpr_err(cpr_vreg, "could not read qcom,cpr-step-quotient, rc=%d\n",
rc);
return rc;
}
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners;
i++)
cpr_vreg->step_quotient[i]
= step_quot[cpr_vreg->cpr_fuse_ro_sel[i]];
} else {
cpr_err(cpr_vreg, "qcom,cpr-step-quotient has invalid length=%d\n",
len);
return -EINVAL;
}
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners; i++)
cpr_debug(cpr_vreg, "step_quotient[%d]=%u\n", i,
cpr_vreg->step_quotient[i]);
return 0;
}
static int cpr_init_cpr_parameters(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
int rc = 0;
CPR_PROP_READ_U32(cpr_vreg, of_node, "cpr-ref-clk",
&cpr_vreg->ref_clk_khz, rc);
if (rc)
return rc;
CPR_PROP_READ_U32(cpr_vreg, of_node, "cpr-timer-delay",
&cpr_vreg->timer_delay_us, rc);
if (rc)
return rc;
CPR_PROP_READ_U32(cpr_vreg, of_node, "cpr-timer-cons-up",
&cpr_vreg->timer_cons_up, rc);
if (rc)
return rc;
CPR_PROP_READ_U32(cpr_vreg, of_node, "cpr-timer-cons-down",
&cpr_vreg->timer_cons_down, rc);
if (rc)
return rc;
CPR_PROP_READ_U32(cpr_vreg, of_node, "cpr-irq-line",
&cpr_vreg->irq_line, rc);
if (rc)
return rc;
rc = cpr_init_step_quotient(pdev, cpr_vreg);
if (rc)
return rc;
CPR_PROP_READ_U32(cpr_vreg, of_node, "cpr-up-threshold",
&cpr_vreg->up_threshold, rc);
if (rc)
return rc;
CPR_PROP_READ_U32(cpr_vreg, of_node, "cpr-down-threshold",
&cpr_vreg->down_threshold, rc);
if (rc)
return rc;
cpr_info(cpr_vreg, "up threshold = %u, down threshold = %u\n",
cpr_vreg->up_threshold, cpr_vreg->down_threshold);
CPR_PROP_READ_U32(cpr_vreg, of_node, "cpr-idle-clocks",
&cpr_vreg->idle_clocks, rc);
if (rc)
return rc;
CPR_PROP_READ_U32(cpr_vreg, of_node, "cpr-gcnt-time",
&cpr_vreg->gcnt_time_us, rc);
if (rc)
return rc;
CPR_PROP_READ_U32(cpr_vreg, of_node, "vdd-apc-step-up-limit",
&cpr_vreg->vdd_apc_step_up_limit, rc);
if (rc)
return rc;
CPR_PROP_READ_U32(cpr_vreg, of_node, "vdd-apc-step-down-limit",
&cpr_vreg->vdd_apc_step_down_limit, rc);
if (rc)
return rc;
rc = of_property_read_u32(of_node, "qcom,cpr-clamp-timer-interval",
&cpr_vreg->clamp_timer_interval);
if (rc && rc != -EINVAL) {
cpr_err(cpr_vreg,
"error reading qcom,cpr-clamp-timer-interval, rc=%d\n",
rc);
return rc;
}
cpr_vreg->clamp_timer_interval = min(cpr_vreg->clamp_timer_interval,
(u32)RBIF_TIMER_ADJ_CLAMP_INT_MASK);
/* Init module parameter with the DT value */
cpr_vreg->enable = of_property_read_bool(of_node, "qcom,cpr-enable");
cpr_info(cpr_vreg, "CPR is %s by default.\n",
cpr_vreg->enable ? "enabled" : "disabled");
return 0;
}
static void cpr_pm_disable(struct cpr_regulator *cpr_vreg, bool disable)
{
u32 reg_val;
if (cpr_vreg->is_cpr_suspended)
return;
reg_val = cpr_read(cpr_vreg, REG_RBCPR_CTL);
if (disable) {
/* Proceed only if CPR is enabled */
if (!(reg_val & RBCPR_CTL_LOOP_EN))
return;
cpr_ctl_disable(cpr_vreg);
cpr_vreg->cpr_disabled_in_pc = true;
} else {
/* Proceed only if CPR was disabled in PM_ENTER */
if (!cpr_vreg->cpr_disabled_in_pc)
return;
cpr_vreg->cpr_disabled_in_pc = false;
cpr_ctl_enable(cpr_vreg, cpr_vreg->corner);
}
/* Make sure register write is complete */
mb();
}
static int cpr_pm_callback(struct notifier_block *nb,
unsigned long action, void *data)
{
struct cpr_regulator *cpr_vreg = container_of(nb,
struct cpr_regulator, pm_notifier);
if (action != CPU_PM_ENTER && action != CPU_PM_ENTER_FAILED &&
action != CPU_PM_EXIT)
return NOTIFY_OK;
switch (action) {
case CPU_PM_ENTER:
cpr_pm_disable(cpr_vreg, true);
break;
case CPU_PM_ENTER_FAILED:
case CPU_PM_EXIT:
cpr_pm_disable(cpr_vreg, false);
break;
}
return NOTIFY_OK;
}
static int cpr_init_pm_notification(struct cpr_regulator *cpr_vreg)
{
int rc;
/* enabled only for single-core designs */
if (cpr_vreg->num_adj_cpus != 1) {
pr_warn("qcom,cpr-cpus not defined or invalid %d\n",
cpr_vreg->num_adj_cpus);
return 0;
}
cpr_vreg->pm_notifier.notifier_call = cpr_pm_callback;
rc = cpu_pm_register_notifier(&cpr_vreg->pm_notifier);
if (rc)
cpr_err(cpr_vreg, "Unable to register pm notifier rc=%d\n", rc);
return rc;
}
static int cpr_rpm_apc_init(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
int rc, len = 0;
struct device_node *of_node = pdev->dev.of_node;
if (!of_find_property(of_node, "rpm-apc-supply", NULL))
return 0;
cpr_vreg->rpm_apc_vreg = devm_regulator_get(&pdev->dev, "rpm-apc");
if (IS_ERR_OR_NULL(cpr_vreg->rpm_apc_vreg)) {
rc = PTR_RET(cpr_vreg->rpm_apc_vreg);
if (rc != -EPROBE_DEFER)
cpr_err(cpr_vreg, "devm_regulator_get: rpm-apc: rc=%d\n",
rc);
return rc;
}
if (!of_find_property(of_node, "qcom,rpm-apc-corner-map", &len)) {
cpr_err(cpr_vreg,
"qcom,rpm-apc-corner-map missing:\n");
return -EINVAL;
}
if (len != cpr_vreg->num_corners * sizeof(u32)) {
cpr_err(cpr_vreg,
"qcom,rpm-apc-corner-map length=%d is invalid: required:%d\n",
len, cpr_vreg->num_corners);
return -EINVAL;
}
cpr_vreg->rpm_apc_corner_map = devm_kzalloc(&pdev->dev,
(cpr_vreg->num_corners + 1) *
sizeof(*cpr_vreg->rpm_apc_corner_map), GFP_KERNEL);
if (!cpr_vreg->rpm_apc_corner_map)
return -ENOMEM;
rc = of_property_read_u32_array(of_node, "qcom,rpm-apc-corner-map",
&cpr_vreg->rpm_apc_corner_map[1], cpr_vreg->num_corners);
if (rc)
cpr_err(cpr_vreg, "read qcom,rpm-apc-corner-map failed, rc = %d\n",
rc);
return rc;
}
static int cpr_parse_vdd_mode_config(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
int rc, len = 0, i, mode;
struct device_node *of_node = pdev->dev.of_node;
const char *prop_str = "qcom,cpr-vdd-mode-map";
if (!of_find_property(of_node, prop_str, &len))
return 0;
if (len != cpr_vreg->num_corners * sizeof(u32)) {
cpr_err(cpr_vreg, "%s length=%d is invalid: required:%d\n",
prop_str, len, cpr_vreg->num_corners);
return -EINVAL;
}
cpr_vreg->vdd_mode_map = devm_kcalloc(&pdev->dev,
cpr_vreg->num_corners + 1,
sizeof(*cpr_vreg->vdd_mode_map),
GFP_KERNEL);
if (!cpr_vreg->vdd_mode_map)
return -ENOMEM;
for (i = 0; i < cpr_vreg->num_corners; i++) {
rc = of_property_read_u32_index(of_node, prop_str, i, &mode);
if (rc) {
cpr_err(cpr_vreg, "read %s index %d failed, rc = %d\n",
prop_str, i, rc);
return rc;
}
cpr_vreg->vdd_mode_map[i + CPR_CORNER_MIN]
= mode ? REGULATOR_MODE_NORMAL
: REGULATOR_MODE_IDLE;
}
return rc;
}
static int cpr_vsens_init(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
int rc = 0, len = 0;
struct device_node *of_node = pdev->dev.of_node;
if (of_find_property(of_node, "vdd-vsens-voltage-supply", NULL)) {
cpr_vreg->vdd_vsens_voltage = devm_regulator_get(&pdev->dev,
"vdd-vsens-voltage");
if (IS_ERR_OR_NULL(cpr_vreg->vdd_vsens_voltage)) {
rc = PTR_ERR(cpr_vreg->vdd_vsens_voltage);
cpr_vreg->vdd_vsens_voltage = NULL;
if (rc == -EPROBE_DEFER)
return rc;
/* device not found */
cpr_debug(cpr_vreg, "regulator_get: vdd-vsens-voltage: rc=%d\n",
rc);
return 0;
}
}
if (of_find_property(of_node, "vdd-vsens-corner-supply", NULL)) {
cpr_vreg->vdd_vsens_corner = devm_regulator_get(&pdev->dev,
"vdd-vsens-corner");
if (IS_ERR_OR_NULL(cpr_vreg->vdd_vsens_corner)) {
rc = PTR_ERR(cpr_vreg->vdd_vsens_corner);
cpr_vreg->vdd_vsens_corner = NULL;
if (rc == -EPROBE_DEFER)
return rc;
/* device not found */
cpr_debug(cpr_vreg, "regulator_get: vdd-vsens-corner: rc=%d\n",
rc);
return 0;
}
if (!of_find_property(of_node, "qcom,vsens-corner-map", &len)) {
cpr_err(cpr_vreg, "qcom,vsens-corner-map missing\n");
return -EINVAL;
}
if (len != cpr_vreg->num_fuse_corners * sizeof(u32)) {
cpr_err(cpr_vreg, "qcom,vsens-corner-map length=%d is invalid: required:%d\n",
len, cpr_vreg->num_fuse_corners);
return -EINVAL;
}
cpr_vreg->vsens_corner_map = devm_kcalloc(&pdev->dev,
(cpr_vreg->num_fuse_corners + 1),
sizeof(*cpr_vreg->vsens_corner_map), GFP_KERNEL);
if (!cpr_vreg->vsens_corner_map)
return -ENOMEM;
rc = of_property_read_u32_array(of_node,
"qcom,vsens-corner-map",
&cpr_vreg->vsens_corner_map[1],
cpr_vreg->num_fuse_corners);
if (rc)
cpr_err(cpr_vreg, "read qcom,vsens-corner-map failed, rc = %d\n",
rc);
}
return rc;
}
static int cpr_init_cpr(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct resource *res;
int rc = 0;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rbcpr_clk");
if (res && res->start)
cpr_vreg->rbcpr_clk_addr = res->start;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rbcpr");
if (!res || !res->start) {
cpr_err(cpr_vreg, "missing rbcpr address: res=%p\n", res);
return -EINVAL;
}
cpr_vreg->rbcpr_base = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
/* Init CPR configuration parameters */
rc = cpr_init_cpr_parameters(pdev, cpr_vreg);
if (rc)
return rc;
rc = cpr_init_cpr_efuse(pdev, cpr_vreg);
if (rc)
return rc;
/* Load per corner ceiling and floor voltages if they exist. */
rc = cpr_init_ceiling_floor_override_voltages(cpr_vreg, &pdev->dev);
if (rc)
return rc;
/*
* Limit open loop voltages based upon per corner ceiling and floor
* voltages.
*/
rc = cpr_limit_open_loop_voltage(cpr_vreg);
if (rc)
return rc;
/*
* Fill the OPP table for this device with virtual voltage corner to
* open-loop voltage pairs.
*/
rc = cpr_populate_opp_table(cpr_vreg, &pdev->dev);
if (rc)
return rc;
/* Reduce the ceiling voltage if allowed. */
rc = cpr_reduce_ceiling_voltage(cpr_vreg, &pdev->dev);
if (rc)
return rc;
/* Load CPR floor to ceiling range if exist. */
rc = cpr_init_floor_to_ceiling_range(cpr_vreg, &pdev->dev);
if (rc)
return rc;
/* Init all voltage set points of APC regulator for CPR */
rc = cpr_init_cpr_voltages(cpr_vreg, &pdev->dev);
if (rc)
return rc;
/* Get and Init interrupt */
cpr_vreg->cpr_irq = platform_get_irq(pdev, 0);
if (!cpr_vreg->cpr_irq) {
cpr_err(cpr_vreg, "missing CPR IRQ\n");
return -EINVAL;
}
/* Configure CPR HW but keep it disabled */
rc = cpr_config(cpr_vreg, &pdev->dev);
if (rc)
return rc;
rc = request_threaded_irq(cpr_vreg->cpr_irq, NULL, cpr_irq_handler,
IRQF_ONESHOT | IRQF_TRIGGER_RISING, "cpr",
cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "CPR: request irq failed for IRQ %d\n",
cpr_vreg->cpr_irq);
return rc;
}
return 0;
}
/*
* Create a set of virtual fuse rows if optional device tree properties are
* present.
*/
static int cpr_remap_efuse_data(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
struct property *prop;
u64 fuse_param;
u32 *temp;
int size, rc, i, bits, in_row, in_bit, out_row, out_bit;
prop = of_find_property(of_node, "qcom,fuse-remap-source", NULL);
if (!prop) {
/* No fuse remapping needed. */
return 0;
}
size = prop->length / sizeof(u32);
if (size == 0 || size % 4) {
cpr_err(cpr_vreg, "qcom,fuse-remap-source has invalid size=%d\n",
size);
return -EINVAL;
}
size /= 4;
rc = of_property_read_u32(of_node, "qcom,fuse-remap-base-row",
&cpr_vreg->remapped_row_base);
if (rc) {
cpr_err(cpr_vreg, "could not read qcom,fuse-remap-base-row, rc=%d\n",
rc);
return rc;
}
temp = kzalloc(sizeof(*temp) * size * 4, GFP_KERNEL);
if (!temp)
return -ENOMEM;
rc = of_property_read_u32_array(of_node, "qcom,fuse-remap-source", temp,
size * 4);
if (rc) {
cpr_err(cpr_vreg, "could not read qcom,fuse-remap-source, rc=%d\n",
rc);
goto done;
}
/*
* Format of tuples in qcom,fuse-remap-source property:
* <row bit-offset bit-count fuse-read-method>
*/
for (i = 0, bits = 0; i < size; i++)
bits += temp[i * 4 + 2];
cpr_vreg->num_remapped_rows = DIV_ROUND_UP(bits, 64);
cpr_vreg->remapped_row = devm_kzalloc(&pdev->dev,
sizeof(*cpr_vreg->remapped_row) * cpr_vreg->num_remapped_rows,
GFP_KERNEL);
if (!cpr_vreg->remapped_row) {
rc = -ENOMEM;
goto done;
}
for (i = 0, out_row = 0, out_bit = 0; i < size; i++) {
in_row = temp[i * 4];
in_bit = temp[i * 4 + 1];
bits = temp[i * 4 + 2];
while (bits > 64) {
fuse_param = cpr_read_efuse_param(cpr_vreg, in_row,
in_bit, 64, temp[i * 4 + 3]);
cpr_vreg->remapped_row[out_row++]
|= fuse_param << out_bit;
if (out_bit > 0)
cpr_vreg->remapped_row[out_row]
|= fuse_param >> (64 - out_bit);
bits -= 64;
in_bit += 64;
}
fuse_param = cpr_read_efuse_param(cpr_vreg, in_row, in_bit,
bits, temp[i * 4 + 3]);
cpr_vreg->remapped_row[out_row] |= fuse_param << out_bit;
if (bits < 64 - out_bit) {
out_bit += bits;
} else {
out_row++;
if (out_bit > 0)
cpr_vreg->remapped_row[out_row]
|= fuse_param >> (64 - out_bit);
out_bit = bits - (64 - out_bit);
}
}
done:
kfree(temp);
return rc;
}
static int cpr_efuse_init(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct resource *res;
int len;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "efuse_addr");
if (!res || !res->start) {
cpr_err(cpr_vreg, "efuse_addr missing: res=%p\n", res);
return -EINVAL;
}
cpr_vreg->efuse_addr = res->start;
len = res->end - res->start + 1;
cpr_info(cpr_vreg, "efuse_addr = %pa (len=0x%x)\n", &res->start, len);
cpr_vreg->efuse_base = ioremap(cpr_vreg->efuse_addr, len);
if (!cpr_vreg->efuse_base) {
cpr_err(cpr_vreg, "Unable to map efuse_addr %pa\n",
&cpr_vreg->efuse_addr);
return -EINVAL;
}
return 0;
}
static void cpr_efuse_free(struct cpr_regulator *cpr_vreg)
{
iounmap(cpr_vreg->efuse_base);
}
static void cpr_parse_cond_min_volt_fuse(struct cpr_regulator *cpr_vreg,
struct device_node *of_node)
{
int rc;
u32 fuse_sel[5];
/*
* Restrict all pvs corner voltages to a minimum value of
* qcom,cpr-cond-min-voltage if the fuse defined in
* qcom,cpr-fuse-cond-min-volt-sel does not read back with
* the expected value.
*/
rc = of_property_read_u32_array(of_node,
"qcom,cpr-fuse-cond-min-volt-sel", fuse_sel, 5);
if (!rc) {
if (!cpr_fuse_is_setting_expected(cpr_vreg, fuse_sel))
cpr_vreg->flags |= FLAGS_SET_MIN_VOLTAGE;
}
}
static void cpr_parse_speed_bin_fuse(struct cpr_regulator *cpr_vreg,
struct device_node *of_node)
{
int rc;
u64 fuse_bits;
u32 fuse_sel[4];
u32 speed_bits;
rc = of_property_read_u32_array(of_node,
"qcom,speed-bin-fuse-sel", fuse_sel, 4);
if (!rc) {
fuse_bits = cpr_read_efuse_row(cpr_vreg,
fuse_sel[0], fuse_sel[3]);
speed_bits = (fuse_bits >> fuse_sel[1]) &
((1 << fuse_sel[2]) - 1);
cpr_info(cpr_vreg, "[row: %d]: 0x%llx, speed_bits = %d\n",
fuse_sel[0], fuse_bits, speed_bits);
cpr_vreg->speed_bin = speed_bits;
} else {
cpr_vreg->speed_bin = SPEED_BIN_NONE;
}
}
static int cpr_voltage_uplift_enable_check(struct cpr_regulator *cpr_vreg,
struct device_node *of_node)
{
int rc;
u32 fuse_sel[5];
u32 uplift_speed_bin;
rc = of_property_read_u32_array(of_node,
"qcom,cpr-fuse-uplift-sel", fuse_sel, 5);
if (!rc) {
rc = of_property_read_u32(of_node,
"qcom,cpr-uplift-speed-bin",
&uplift_speed_bin);
if (rc < 0) {
cpr_err(cpr_vreg,
"qcom,cpr-uplift-speed-bin missing\n");
return rc;
}
if (cpr_fuse_is_setting_expected(cpr_vreg, fuse_sel)
&& (uplift_speed_bin == cpr_vreg->speed_bin)
&& !(cpr_vreg->flags & FLAGS_SET_MIN_VOLTAGE)) {
cpr_vreg->flags |= FLAGS_UPLIFT_QUOT_VOLT;
}
}
return 0;
}
/*
* Read in the number of fuse corners and then allocate memory for arrays that
* are sized based upon the number of fuse corners.
*/
static int cpr_fuse_corner_array_alloc(struct device *dev,
struct cpr_regulator *cpr_vreg)
{
int rc;
size_t len;
rc = of_property_read_u32(dev->of_node, "qcom,cpr-fuse-corners",
&cpr_vreg->num_fuse_corners);
if (rc < 0) {
cpr_err(cpr_vreg, "qcom,cpr-fuse-corners missing: rc=%d\n", rc);
return rc;
}
if (cpr_vreg->num_fuse_corners < CPR_FUSE_CORNER_MIN
|| cpr_vreg->num_fuse_corners > CPR_FUSE_CORNER_LIMIT) {
cpr_err(cpr_vreg, "corner count=%d is invalid\n",
cpr_vreg->num_fuse_corners);
return -EINVAL;
}
/*
* The arrays sized based on the fuse corner count ignore element 0
* in order to simplify indexing throughout the driver since min_uV = 0
* cannot be passed into a set_voltage() callback.
*/
len = cpr_vreg->num_fuse_corners + 1;
cpr_vreg->pvs_corner_v = devm_kzalloc(dev,
len * sizeof(*cpr_vreg->pvs_corner_v), GFP_KERNEL);
cpr_vreg->cpr_fuse_target_quot = devm_kzalloc(dev,
len * sizeof(*cpr_vreg->cpr_fuse_target_quot), GFP_KERNEL);
cpr_vreg->cpr_fuse_ro_sel = devm_kzalloc(dev,
len * sizeof(*cpr_vreg->cpr_fuse_ro_sel), GFP_KERNEL);
cpr_vreg->fuse_ceiling_volt = devm_kzalloc(dev,
len * (sizeof(*cpr_vreg->fuse_ceiling_volt)), GFP_KERNEL);
cpr_vreg->fuse_floor_volt = devm_kzalloc(dev,
len * (sizeof(*cpr_vreg->fuse_floor_volt)), GFP_KERNEL);
cpr_vreg->step_quotient = devm_kzalloc(dev,
len * sizeof(*cpr_vreg->step_quotient), GFP_KERNEL);
if (cpr_vreg->pvs_corner_v == NULL || cpr_vreg->cpr_fuse_ro_sel == NULL
|| cpr_vreg->fuse_ceiling_volt == NULL
|| cpr_vreg->fuse_floor_volt == NULL
|| cpr_vreg->cpr_fuse_target_quot == NULL
|| cpr_vreg->step_quotient == NULL)
return -ENOMEM;
return 0;
}
static int cpr_voltage_plan_init(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
struct device_node *of_node = pdev->dev.of_node;
int rc, i;
u32 min_uv = 0;
rc = of_property_read_u32_array(of_node, "qcom,cpr-voltage-ceiling",
&cpr_vreg->fuse_ceiling_volt[CPR_FUSE_CORNER_MIN],
cpr_vreg->num_fuse_corners);
if (rc < 0) {
cpr_err(cpr_vreg, "cpr-voltage-ceiling missing: rc=%d\n", rc);
return rc;
}
rc = of_property_read_u32_array(of_node, "qcom,cpr-voltage-floor",
&cpr_vreg->fuse_floor_volt[CPR_FUSE_CORNER_MIN],
cpr_vreg->num_fuse_corners);
if (rc < 0) {
cpr_err(cpr_vreg, "cpr-voltage-floor missing: rc=%d\n", rc);
return rc;
}
cpr_parse_cond_min_volt_fuse(cpr_vreg, of_node);
rc = cpr_voltage_uplift_enable_check(cpr_vreg, of_node);
if (rc < 0) {
cpr_err(cpr_vreg, "voltage uplift enable check failed, %d\n",
rc);
return rc;
}
if (cpr_vreg->flags & FLAGS_SET_MIN_VOLTAGE) {
of_property_read_u32(of_node, "qcom,cpr-cond-min-voltage",
&min_uv);
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners;
i++)
if (cpr_vreg->fuse_ceiling_volt[i] < min_uv) {
cpr_vreg->fuse_ceiling_volt[i] = min_uv;
cpr_vreg->fuse_floor_volt[i] = min_uv;
} else if (cpr_vreg->fuse_floor_volt[i] < min_uv) {
cpr_vreg->fuse_floor_volt[i] = min_uv;
}
}
return 0;
}
static int cpr_mem_acc_init(struct platform_device *pdev,
struct cpr_regulator *cpr_vreg)
{
int rc, size;
struct property *prop;
char *corner_map_str;
if (of_find_property(pdev->dev.of_node, "mem-acc-supply", NULL)) {
cpr_vreg->mem_acc_vreg = devm_regulator_get(&pdev->dev,
"mem-acc");
if (IS_ERR_OR_NULL(cpr_vreg->mem_acc_vreg)) {
rc = PTR_RET(cpr_vreg->mem_acc_vreg);
if (rc != -EPROBE_DEFER)
cpr_err(cpr_vreg,
"devm_regulator_get: mem-acc: rc=%d\n",
rc);
return rc;
}
}
corner_map_str = "qcom,mem-acc-corner-map";
prop = of_find_property(pdev->dev.of_node, corner_map_str, NULL);
if (!prop) {
corner_map_str = "qcom,cpr-corner-map";
prop = of_find_property(pdev->dev.of_node, corner_map_str,
NULL);
if (!prop) {
cpr_err(cpr_vreg, "qcom,cpr-corner-map missing\n");
return -EINVAL;
}
}
size = prop->length / sizeof(u32);
cpr_vreg->mem_acc_corner_map = devm_kzalloc(&pdev->dev,
sizeof(int) * (size + 1),
GFP_KERNEL);
rc = of_property_read_u32_array(pdev->dev.of_node, corner_map_str,
&cpr_vreg->mem_acc_corner_map[CPR_FUSE_CORNER_MIN],
size);
if (rc) {
cpr_err(cpr_vreg, "%s missing, rc = %d\n", corner_map_str, rc);
return rc;
}
return 0;
}
#if defined(CONFIG_DEBUG_FS)
static int cpr_enable_set(void *data, u64 val)
{
struct cpr_regulator *cpr_vreg = data;
bool old_cpr_enable;
mutex_lock(&cpr_vreg->cpr_mutex);
old_cpr_enable = cpr_vreg->enable;
cpr_vreg->enable = val;
if (old_cpr_enable == cpr_vreg->enable)
goto _exit;
if (cpr_vreg->enable && cpr_vreg->cpr_fuse_disable) {
cpr_info(cpr_vreg,
"CPR permanently disabled due to fuse values\n");
cpr_vreg->enable = false;
goto _exit;
}
cpr_debug(cpr_vreg, "%s CPR [corner=%d, fuse_corner=%d]\n",
cpr_vreg->enable ? "enabling" : "disabling",
cpr_vreg->corner, cpr_vreg->corner_map[cpr_vreg->corner]);
if (cpr_vreg->corner) {
if (cpr_vreg->enable) {
cpr_ctl_disable(cpr_vreg);
cpr_irq_clr(cpr_vreg);
cpr_corner_restore(cpr_vreg, cpr_vreg->corner);
cpr_ctl_enable(cpr_vreg, cpr_vreg->corner);
} else {
cpr_ctl_disable(cpr_vreg);
cpr_irq_set(cpr_vreg, 0);
}
}
_exit:
mutex_unlock(&cpr_vreg->cpr_mutex);
return 0;
}
static int cpr_enable_get(void *data, u64 *val)
{
struct cpr_regulator *cpr_vreg = data;
*val = cpr_vreg->enable;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(cpr_enable_fops, cpr_enable_get, cpr_enable_set,
"%llu\n");
static int cpr_get_cpr_ceiling(void *data, u64 *val)
{
struct cpr_regulator *cpr_vreg = data;
*val = cpr_vreg->ceiling_volt[cpr_vreg->corner];
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(cpr_ceiling_fops, cpr_get_cpr_ceiling, NULL,
"%llu\n");
static int cpr_get_cpr_floor(void *data, u64 *val)
{
struct cpr_regulator *cpr_vreg = data;
*val = cpr_vreg->floor_volt[cpr_vreg->corner];
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(cpr_floor_fops, cpr_get_cpr_floor, NULL,
"%llu\n");
static int cpr_get_cpr_max_ceiling(void *data, u64 *val)
{
struct cpr_regulator *cpr_vreg = data;
*val = cpr_vreg->cpr_max_ceiling[cpr_vreg->corner];
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(cpr_max_ceiling_fops, cpr_get_cpr_max_ceiling, NULL,
"%llu\n");
static int cpr_debug_info_open(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
return 0;
}
static ssize_t cpr_debug_info_read(struct file *file, char __user *buff,
size_t count, loff_t *ppos)
{
struct cpr_regulator *cpr_vreg = file->private_data;
char *debugfs_buf;
ssize_t len, ret = 0;
u32 gcnt, ro_sel, ctl, irq_status, reg, error_steps;
u32 step_dn, step_up, error, error_lt0, busy;
int fuse_corner;
debugfs_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!debugfs_buf)
return -ENOMEM;
mutex_lock(&cpr_vreg->cpr_mutex);
fuse_corner = cpr_vreg->corner_map[cpr_vreg->corner];
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
"corner = %d, current_volt = %d uV\n",
cpr_vreg->corner, cpr_vreg->last_volt[cpr_vreg->corner]);
ret += len;
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
"fuse_corner = %d, current_volt = %d uV\n",
fuse_corner, cpr_vreg->last_volt[cpr_vreg->corner]);
ret += len;
ro_sel = cpr_vreg->cpr_fuse_ro_sel[fuse_corner];
gcnt = cpr_read(cpr_vreg, REG_RBCPR_GCNT_TARGET(ro_sel));
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
"rbcpr_gcnt_target (%u) = 0x%02X\n", ro_sel, gcnt);
ret += len;
ctl = cpr_read(cpr_vreg, REG_RBCPR_CTL);
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
"rbcpr_ctl = 0x%02X\n", ctl);
ret += len;
irq_status = cpr_read(cpr_vreg, REG_RBIF_IRQ_STATUS);
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
"rbcpr_irq_status = 0x%02X\n", irq_status);
ret += len;
reg = cpr_read(cpr_vreg, REG_RBCPR_RESULT_0);
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
"rbcpr_result_0 = 0x%02X\n", reg);
ret += len;
step_dn = reg & 0x01;
step_up = (reg >> RBCPR_RESULT0_STEP_UP_SHIFT) & 0x01;
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
" [step_dn = %u", step_dn);
ret += len;
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
", step_up = %u", step_up);
ret += len;
error_steps = (reg >> RBCPR_RESULT0_ERROR_STEPS_SHIFT)
& RBCPR_RESULT0_ERROR_STEPS_MASK;
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
", error_steps = %u", error_steps);
ret += len;
error = (reg >> RBCPR_RESULT0_ERROR_SHIFT) & RBCPR_RESULT0_ERROR_MASK;
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
", error = %u", error);
ret += len;
error_lt0 = (reg >> RBCPR_RESULT0_ERROR_LT0_SHIFT) & 0x01;
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
", error_lt_0 = %u", error_lt0);
ret += len;
busy = (reg >> RBCPR_RESULT0_BUSY_SHIFT) & 0x01;
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
", busy = %u]\n", busy);
ret += len;
mutex_unlock(&cpr_vreg->cpr_mutex);
ret = simple_read_from_buffer(buff, count, ppos, debugfs_buf, ret);
kfree(debugfs_buf);
return ret;
}
static const struct file_operations cpr_debug_info_fops = {
.open = cpr_debug_info_open,
.read = cpr_debug_info_read,
};
static int cpr_aging_debug_info_open(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
return 0;
}
static ssize_t cpr_aging_debug_info_read(struct file *file, char __user *buff,
size_t count, loff_t *ppos)
{
struct cpr_regulator *cpr_vreg = file->private_data;
struct cpr_aging_info *aging_info = cpr_vreg->aging_info;
char *debugfs_buf;
ssize_t len, ret = 0;
int i;
debugfs_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!debugfs_buf)
return -ENOMEM;
mutex_lock(&cpr_vreg->cpr_mutex);
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
"aging_adj_volt = [");
ret += len;
for (i = CPR_FUSE_CORNER_MIN; i <= cpr_vreg->num_fuse_corners; i++) {
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
" %d", aging_info->voltage_adjust[i]);
ret += len;
}
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
" ]uV\n");
ret += len;
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
"aging_measurement_done = %s\n",
aging_info->cpr_aging_done ? "true" : "false");
ret += len;
len = snprintf(debugfs_buf + ret, PAGE_SIZE - ret,
"aging_measurement_error = %s\n",
aging_info->cpr_aging_error ? "true" : "false");
ret += len;
mutex_unlock(&cpr_vreg->cpr_mutex);
ret = simple_read_from_buffer(buff, count, ppos, debugfs_buf, ret);
kfree(debugfs_buf);
return ret;
}
static const struct file_operations cpr_aging_debug_info_fops = {
.open = cpr_aging_debug_info_open,
.read = cpr_aging_debug_info_read,
};
static void cpr_debugfs_init(struct cpr_regulator *cpr_vreg)
{
struct dentry *temp;
if (IS_ERR_OR_NULL(cpr_debugfs_base)) {
cpr_err(cpr_vreg, "Could not create debugfs nodes since base directory is missing\n");
return;
}
cpr_vreg->debugfs = debugfs_create_dir(cpr_vreg->rdesc.name,
cpr_debugfs_base);
if (IS_ERR_OR_NULL(cpr_vreg->debugfs)) {
cpr_err(cpr_vreg, "debugfs directory creation failed\n");
return;
}
temp = debugfs_create_file("debug_info", 0444, cpr_vreg->debugfs,
cpr_vreg, &cpr_debug_info_fops);
if (IS_ERR_OR_NULL(temp)) {
cpr_err(cpr_vreg, "debug_info node creation failed\n");
return;
}
temp = debugfs_create_file("cpr_enable", 0644, cpr_vreg->debugfs,
cpr_vreg, &cpr_enable_fops);
if (IS_ERR_OR_NULL(temp)) {
cpr_err(cpr_vreg, "cpr_enable node creation failed\n");
return;
}
temp = debugfs_create_file("cpr_ceiling", 0444, cpr_vreg->debugfs,
cpr_vreg, &cpr_ceiling_fops);
if (IS_ERR_OR_NULL(temp)) {
cpr_err(cpr_vreg, "cpr_ceiling node creation failed\n");
return;
}
temp = debugfs_create_file("cpr_floor", 0444, cpr_vreg->debugfs,
cpr_vreg, &cpr_floor_fops);
if (IS_ERR_OR_NULL(temp)) {
cpr_err(cpr_vreg, "cpr_floor node creation failed\n");
return;
}
temp = debugfs_create_file("cpr_max_ceiling", 0444, cpr_vreg->debugfs,
cpr_vreg, &cpr_max_ceiling_fops);
if (IS_ERR_OR_NULL(temp)) {
cpr_err(cpr_vreg, "cpr_max_ceiling node creation failed\n");
return;
}
if (cpr_vreg->aging_info) {
temp = debugfs_create_file("aging_debug_info", 0444,
cpr_vreg->debugfs, cpr_vreg,
&cpr_aging_debug_info_fops);
if (IS_ERR_OR_NULL(temp)) {
cpr_err(cpr_vreg, "aging_debug_info node creation failed\n");
return;
}
}
}
static void cpr_debugfs_remove(struct cpr_regulator *cpr_vreg)
{
debugfs_remove_recursive(cpr_vreg->debugfs);
}
static void cpr_debugfs_base_init(void)
{
cpr_debugfs_base = debugfs_create_dir("cpr-regulator", NULL);
if (IS_ERR_OR_NULL(cpr_debugfs_base))
pr_err("cpr-regulator debugfs base directory creation failed\n");
}
static void cpr_debugfs_base_remove(void)
{
debugfs_remove_recursive(cpr_debugfs_base);
}
#else
static void cpr_debugfs_init(struct cpr_regulator *cpr_vreg)
{}
static void cpr_debugfs_remove(struct cpr_regulator *cpr_vreg)
{}
static void cpr_debugfs_base_init(void)
{}
static void cpr_debugfs_base_remove(void)
{}
#endif
/**
* cpr_panic_callback() - panic notification callback function. This function
* is invoked when a kernel panic occurs.
* @nfb: Notifier block pointer of CPR regulator
* @event: Value passed unmodified to notifier function
* @data: Pointer passed unmodified to notifier function
*
* Return: NOTIFY_OK
*/
static int cpr_panic_callback(struct notifier_block *nfb,
unsigned long event, void *data)
{
struct cpr_regulator *cpr_vreg = container_of(nfb,
struct cpr_regulator, panic_notifier);
int corner, fuse_corner, volt;
corner = cpr_vreg->corner;
fuse_corner = cpr_vreg->corner_map[corner];
if (cpr_is_allowed(cpr_vreg))
volt = cpr_vreg->last_volt[corner];
else
volt = cpr_vreg->open_loop_volt[corner];
cpr_err(cpr_vreg, "[corner:%d, fuse_corner:%d] = %d uV\n",
corner, fuse_corner, volt);
return NOTIFY_OK;
}
static int cpr_regulator_probe(struct platform_device *pdev)
{
struct regulator_config reg_config = {};
struct cpr_regulator *cpr_vreg;
struct regulator_desc *rdesc;
struct device *dev = &pdev->dev;
struct regulator_init_data *init_data = pdev->dev.platform_data;
int rc;
if (!pdev->dev.of_node) {
dev_err(dev, "Device tree node is missing\n");
return -EINVAL;
}
cpr_vreg = devm_kzalloc(&pdev->dev, sizeof(struct cpr_regulator),
GFP_KERNEL);
if (!cpr_vreg)
return -ENOMEM;
init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
&cpr_vreg->rdesc);
if (!init_data) {
dev_err(dev, "regulator init data is missing\n");
return -EINVAL;
}
init_data->constraints.input_uV = init_data->constraints.max_uV;
init_data->constraints.valid_ops_mask
|= REGULATOR_CHANGE_VOLTAGE | REGULATOR_CHANGE_STATUS;
cpr_vreg->rdesc.name = init_data->constraints.name;
if (cpr_vreg->rdesc.name == NULL) {
dev_err(dev, "regulator-name missing\n");
return -EINVAL;
}
rc = cpr_fuse_corner_array_alloc(&pdev->dev, cpr_vreg);
if (rc)
return rc;
rc = cpr_mem_acc_init(pdev, cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "mem_acc initialization error rc=%d\n", rc);
return rc;
}
rc = cpr_efuse_init(pdev, cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "Wrong eFuse address specified: rc=%d\n", rc);
return rc;
}
rc = cpr_remap_efuse_data(pdev, cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "Could not remap fuse data: rc=%d\n", rc);
return rc;
}
rc = cpr_check_redundant(pdev, cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "Could not check redundant fuse: rc=%d\n",
rc);
goto err_out;
}
rc = cpr_read_fuse_revision(pdev, cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "Could not read fuse revision: rc=%d\n", rc);
goto err_out;
}
cpr_parse_speed_bin_fuse(cpr_vreg, dev->of_node);
cpr_parse_pvs_version_fuse(cpr_vreg, dev->of_node);
rc = cpr_read_ro_select(pdev, cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "Could not read RO select: rc=%d\n", rc);
goto err_out;
}
rc = cpr_find_fuse_map_match(pdev, cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "Could not determine fuse mapping match: rc=%d\n",
rc);
goto err_out;
}
rc = cpr_voltage_plan_init(pdev, cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "Wrong DT parameter specified: rc=%d\n", rc);
goto err_out;
}
rc = cpr_pvs_init(pdev, cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "Initialize PVS wrong: rc=%d\n", rc);
goto err_out;
}
rc = cpr_vsens_init(pdev, cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "Initialize vsens configuration failed rc=%d\n",
rc);
return rc;
}
rc = cpr_apc_init(pdev, cpr_vreg);
if (rc) {
if (rc != -EPROBE_DEFER)
cpr_err(cpr_vreg, "Initialize APC wrong: rc=%d\n", rc);
goto err_out;
}
rc = cpr_init_cpr(pdev, cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "Initialize CPR failed: rc=%d\n", rc);
goto err_out;
}
rc = cpr_rpm_apc_init(pdev, cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "Initialize RPM APC regulator failed rc=%d\n",
rc);
return rc;
}
rc = cpr_parse_vdd_mode_config(pdev, cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "vdd-mode parsing failed, rc=%d\n", rc);
return rc;
}
if (of_property_read_bool(pdev->dev.of_node,
"qcom,disable-closed-loop-in-pc")) {
rc = cpr_init_pm_notification(cpr_vreg);
if (rc) {
cpr_err(cpr_vreg,
"cpr_init_pm_notification failed rc=%d\n", rc);
return rc;
}
}
/* Parse dependency parameters */
if (cpr_vreg->vdd_mx) {
rc = cpr_parse_vdd_mx_parameters(pdev, cpr_vreg);
if (rc) {
cpr_err(cpr_vreg, "parsing vdd_mx parameters failed: rc=%d\n",
rc);
goto err_out;
}
}
cpr_efuse_free(cpr_vreg);
/*
* Ensure that enable state accurately reflects the case in which CPR
* is permanently disabled.
*/
cpr_vreg->enable &= !cpr_vreg->cpr_fuse_disable;
mutex_init(&cpr_vreg->cpr_mutex);
rdesc = &cpr_vreg->rdesc;
rdesc->owner = THIS_MODULE;
rdesc->type = REGULATOR_VOLTAGE;
rdesc->ops = &cpr_corner_ops;
reg_config.dev = &pdev->dev;
reg_config.init_data = init_data;
reg_config.driver_data = cpr_vreg;
reg_config.of_node = pdev->dev.of_node;
cpr_vreg->rdev = regulator_register(rdesc, &reg_config);
if (IS_ERR(cpr_vreg->rdev)) {
rc = PTR_ERR(cpr_vreg->rdev);
cpr_err(cpr_vreg, "regulator_register failed: rc=%d\n", rc);
cpr_apc_exit(cpr_vreg);
return rc;
}
platform_set_drvdata(pdev, cpr_vreg);
cpr_debugfs_init(cpr_vreg);
/* Register panic notification call back */
cpr_vreg->panic_notifier.notifier_call = cpr_panic_callback;
atomic_notifier_chain_register(&panic_notifier_list,
&cpr_vreg->panic_notifier);
mutex_lock(&cpr_regulator_list_mutex);
list_add(&cpr_vreg->list, &cpr_regulator_list);
mutex_unlock(&cpr_regulator_list_mutex);
return 0;
err_out:
cpr_efuse_free(cpr_vreg);
return rc;
}
static int cpr_regulator_remove(struct platform_device *pdev)
{
struct cpr_regulator *cpr_vreg;
cpr_vreg = platform_get_drvdata(pdev);
if (cpr_vreg) {
/* Disable CPR */
if (cpr_is_allowed(cpr_vreg)) {
cpr_ctl_disable(cpr_vreg);
cpr_irq_set(cpr_vreg, 0);
}
mutex_lock(&cpr_regulator_list_mutex);
list_del(&cpr_vreg->list);
mutex_unlock(&cpr_regulator_list_mutex);
atomic_notifier_chain_unregister(&panic_notifier_list,
&cpr_vreg->panic_notifier);
cpr_apc_exit(cpr_vreg);
cpr_debugfs_remove(cpr_vreg);
regulator_unregister(cpr_vreg->rdev);
}
return 0;
}
static const struct of_device_id cpr_regulator_match_table[] = {
{ .compatible = CPR_REGULATOR_DRIVER_NAME, },
{}
};
MODULE_DEVICE_TABLE(of, cpr_regulator_match_table);
static struct platform_driver cpr_regulator_driver = {
.driver = {
.name = CPR_REGULATOR_DRIVER_NAME,
.of_match_table = cpr_regulator_match_table,
.owner = THIS_MODULE,
},
.probe = cpr_regulator_probe,
.remove = cpr_regulator_remove,
.suspend = cpr_regulator_suspend,
.resume = cpr_regulator_resume,
};
/**
* cpr_regulator_init() - register cpr-regulator driver
*
* This initialization function should be called in systems in which driver
* registration ordering must be controlled precisely.
*/
int __init cpr_regulator_init(void)
{
static bool initialized;
if (initialized)
return 0;
initialized = true;
cpr_debugfs_base_init();
return platform_driver_register(&cpr_regulator_driver);
}
EXPORT_SYMBOL(cpr_regulator_init);
static void __exit cpr_regulator_exit(void)
{
platform_driver_unregister(&cpr_regulator_driver);
cpr_debugfs_base_remove();
}
MODULE_DESCRIPTION("CPR regulator driver");
MODULE_LICENSE("GPL v2");
arch_initcall(cpr_regulator_init);
module_exit(cpr_regulator_exit);