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clk: meson8b: clean up pll clocks

Browse Source 
Remove the pll registration function and helpers. Replace unnecessary
configuration struct with static initialization of the desired clock
type.

Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
tirimbino
Michael Turquette 9 years ago
parent e92f7cca44
commit ec623f2a43
4 changed files with 131 additions and 114 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 72
      drivers/clk/meson/clk-pll.c
  2. 6
      drivers/clk/meson/clkc.c
  3. 52
      drivers/clk/meson/clkc.h
  4. 115
      drivers/clk/meson/meson8b-clkc.c

72
drivers/clk/meson/clk-pll.c
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@ -44,13 +44,6 @@
#define MESON_PLL_RESET BIT(29)
#define MESON_PLL_LOCK BIT(31)
struct meson_clk_pll {
struct clk_hw hw;
void __iomem *base;
struct pll_conf *conf;
unsigned int rate_count;
spinlock_t *lock;
};
#define to_meson_clk_pll(_hw) container_of(_hw, struct meson_clk_pll, hw)
static unsigned long meson_clk_pll_recalc_rate(struct clk_hw *hw,
@ -63,15 +56,15 @@ static unsigned long meson_clk_pll_recalc_rate(struct clk_hw *hw,
u16 n, m, od;
u32 reg;
p = &pll->conf->n;
p = &pll->n;
reg = readl(pll->base + p->reg_off);
n = PARM_GET(p->width, p->shift, reg);
p = &pll->conf->m;
p = &pll->m;
reg = readl(pll->base + p->reg_off);
m = PARM_GET(p->width, p->shift, reg);
p = &pll->conf->od;
p = &pll->od;
reg = readl(pll->base + p->reg_off);
od = PARM_GET(p->width, p->shift, reg);
@ -84,7 +77,7 @@ static long meson_clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
struct meson_clk_pll *pll = to_meson_clk_pll(hw);
const struct pll_rate_table *rate_table = pll->conf->rate_table;
const struct pll_rate_table *rate_table = pll->rate_table;
int i;
for (i = 0; i < pll->rate_count; i++) {
@ -99,7 +92,7 @@ static long meson_clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
static const struct pll_rate_table *meson_clk_get_pll_settings(struct meson_clk_pll *pll,
unsigned long rate)
{
const struct pll_rate_table *rate_table = pll->conf->rate_table;
const struct pll_rate_table *rate_table = pll->rate_table;
int i;
for (i = 0; i < pll->rate_count; i++) {
@ -145,24 +138,24 @@ static int meson_clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
return -EINVAL;
/* PLL reset */
p = &pll->conf->n;
p = &pll->n;
reg = readl(pll->base + p->reg_off);
writel(reg | MESON_PLL_RESET, pll->base + p->reg_off);
reg = PARM_SET(p->width, p->shift, reg, rate_set->n);
writel(reg, pll->base + p->reg_off);
p = &pll->conf->m;
p = &pll->m;
reg = readl(pll->base + p->reg_off);
reg = PARM_SET(p->width, p->shift, reg, rate_set->m);
writel(reg, pll->base + p->reg_off);
p = &pll->conf->od;
p = &pll->od;
reg = readl(pll->base + p->reg_off);
reg = PARM_SET(p->width, p->shift, reg, rate_set->od);
writel(reg, pll->base + p->reg_off);
p = &pll->conf->n;
p = &pll->n;
ret = meson_clk_pll_wait_lock(pll, p);
if (ret) {
pr_warn("%s: pll did not lock, trying to restore old rate %lu\n",
@ -173,55 +166,12 @@ static int meson_clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
return ret;
}
static const struct clk_ops meson_clk_pll_ops = {
const struct clk_ops meson_clk_pll_ops = {
.recalc_rate = meson_clk_pll_recalc_rate,
.round_rate = meson_clk_pll_round_rate,
.set_rate = meson_clk_pll_set_rate,
};
static const struct clk_ops meson_clk_pll_ro_ops = {
const struct clk_ops meson_clk_pll_ro_ops = {
.recalc_rate = meson_clk_pll_recalc_rate,
};
struct clk *meson_clk_register_pll(const struct clk_conf *clk_conf,
void __iomem *reg_base,
spinlock_t *lock)
{
struct clk *clk;
struct meson_clk_pll *clk_pll;
struct clk_init_data init;
clk_pll = kzalloc(sizeof(*clk_pll), GFP_KERNEL);
if (!clk_pll)
return ERR_PTR(-ENOMEM);
clk_pll->base = reg_base + clk_conf->reg_off;
clk_pll->lock = lock;
clk_pll->conf = clk_conf->conf.pll;
init.name = clk_conf->clk_name;
init.flags = clk_conf->flags | CLK_GET_RATE_NOCACHE;
init.parent_names = &clk_conf->clks_parent[0];
init.num_parents = 1;
init.ops = &meson_clk_pll_ro_ops;
/* If no rate_table is specified we assume the PLL is read-only */
if (clk_pll->conf->rate_table) {
int len;
for (len = 0; clk_pll->conf->rate_table[len].rate != 0; )
len++;
clk_pll->rate_count = len;
init.ops = &meson_clk_pll_ops;
}
clk_pll->hw.init = &init;
clk = clk_register(NULL, &clk_pll->hw);
if (IS_ERR(clk))
kfree(clk_pll);
return clk;
}

6
drivers/clk/meson/clkc.c
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@ -21,7 +21,7 @@
#include "clkc.h"
static DEFINE_SPINLOCK(clk_lock);
DEFINE_SPINLOCK(clk_lock);
static struct clk **clks;
static struct clk_onecell_data clk_data;
@ -190,10 +190,6 @@ void __init meson_clk_register_clks(const struct clk_conf *clk_confs,
clk = meson_clk_register_cpu(clk_conf, clk_base,
&clk_lock);
break;
case CLK_PLL:
clk = meson_clk_register_pll(clk_conf, clk_base,
&clk_lock);
break;
default:
clk = NULL;
}

52
drivers/clk/meson/clkc.h
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@ -34,12 +34,13 @@ struct parm {
u8 shift;
u8 width;
};
#define PARM(_r, _s, _w) \
{ \
.reg_off = (_r), \
.shift = (_s), \
.width = (_w), \
} \
#define PARM(_r, _s, _w) \
{ \
.reg_off = (_r), \
.shift = (_s), \
.width = (_w), \
} \
struct pll_rate_table {
unsigned long rate;
@ -55,13 +56,19 @@ struct pll_rate_table {
.od = (_od), \
} \
struct pll_conf {
const struct pll_rate_table *rate_table;
struct parm m;
struct parm n;
struct parm od;
struct meson_clk_pll {
struct clk_hw hw;
void __iomem *base;
struct parm m;
struct parm n;
struct parm od;
const struct pll_rate_table *rate_table;
unsigned int rate_count;
spinlock_t *lock;
};
#define to_meson_clk_pll(_hw) container_of(_hw, struct meson_clk_pll, hw)
struct fixed_fact_conf {
unsigned int div;
unsigned int mult;
@ -86,7 +93,6 @@ enum clk_type {
CLK_FIXED_FACTOR,
CLK_COMPOSITE,
CLK_CPU,
CLK_PLL,
};
struct clk_conf {
@ -100,23 +106,10 @@ struct clk_conf {
union {
struct fixed_fact_conf fixed_fact;
const struct composite_conf *composite;
struct pll_conf *pll;
const struct clk_div_table *div_table;
} conf;
};
#define PLL(_ro, _ci, _cn, _cp, _f, _c) \
{ \
.reg_off = (_ro), \
.clk_type = CLK_PLL, \
.clk_id = (_ci), \
.clk_name = (_cn), \
.clks_parent = (_cp), \
.num_parents = ARRAY_SIZE(_cp), \
.flags = (_f), \
.conf.pll = (_c), \
} \
#define FIXED_FACTOR_DIV(_ci, _cn, _cp, _f, _d) \
{ \
.clk_type = CLK_FIXED_FACTOR, \
@ -155,7 +148,12 @@ void meson_clk_register_clks(const struct clk_conf *clk_confs,
unsigned int nr_confs, void __iomem *clk_base);
struct clk *meson_clk_register_cpu(const struct clk_conf *clk_conf,
void __iomem *reg_base, spinlock_t *lock);
struct clk *meson_clk_register_pll(const struct clk_conf *clk_conf,
void __iomem *reg_base, spinlock_t *lock);
/* shared data */
extern spinlock_t clk_lock;
/* clk_ops */
extern const struct clk_ops meson_clk_pll_ro_ops;
extern const struct clk_ops meson_clk_pll_ops;
#endif /* __CLKC_H */

115
drivers/clk/meson/meson8b-clkc.c
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@ -110,7 +110,6 @@ static const struct clk_div_table cpu_div_table[] = {
{ /* sentinel */ },
};
PNAME(p_xtal) = { "xtal" };
PNAME(p_fclk_div) = { "fixed_pll" };
PNAME(p_cpu_clk) = { "sys_pll" };
PNAME(p_clk81) = { "fclk_div3", "fclk_div4", "fclk_div5" };
@ -120,19 +119,6 @@ PNAME(p_mali) = { "fclk_div3", "fclk_div4", "fclk_div5",
static u32 mux_table_clk81[] = { 6, 5, 7 };
static u32 mux_table_mali[] = { 6, 5, 7, 4, 0 };
static struct pll_conf pll_confs = {
.m = PARM(0x00, 0, 9),
.n = PARM(0x00, 9, 5),
.od = PARM(0x00, 16, 2),
};
static struct pll_conf sys_pll_conf = {
.m = PARM(0x00, 0, 9),
.n = PARM(0x00, 9, 5),
.od = PARM(0x00, 16, 2),
.rate_table = sys_pll_rate_table,
};
static const struct composite_conf clk81_conf __initconst = {
.mux_table = mux_table_clk81,
.mux_flags = CLK_MUX_READ_ONLY,
@ -166,13 +152,87 @@ static struct clk_fixed_rate meson8b_zero = {
},
};
static struct meson_clk_pll meson8b_fixed_pll = {
.m = {
.reg_off = MESON8B_REG_PLL_FIXED,
.shift = 0,
.width = 9,
},
.n = {
.reg_off = MESON8B_REG_PLL_FIXED,
.shift = 9,
.width = 5,
},
.od = {
.reg_off = MESON8B_REG_PLL_FIXED,
.shift = 16,
.width = 2,
},
.lock = &clk_lock,
.hw.init = &(struct clk_init_data){
.name = "fixed_pll",
.ops = &meson_clk_pll_ro_ops,
.parent_names = (const char *[]){ "xtal" },
.num_parents = 1,
.flags = CLK_GET_RATE_NOCACHE,
},
};
static struct meson_clk_pll meson8b_vid_pll = {
.m = {
.reg_off = MESON8B_REG_PLL_VID,
.shift = 0,
.width = 9,
},
.n = {
.reg_off = MESON8B_REG_PLL_VID,
.shift = 9,
.width = 5,
},
.od = {
.reg_off = MESON8B_REG_PLL_VID,
.shift = 16,
.width = 2,
},
.lock = &clk_lock,
.hw.init = &(struct clk_init_data){
.name = "vid_pll",
.ops = &meson_clk_pll_ro_ops,
.parent_names = (const char *[]){ "xtal" },
.num_parents = 1,
.flags = CLK_GET_RATE_NOCACHE,
},
};
static struct meson_clk_pll meson8b_sys_pll = {
.m = {
.reg_off = MESON8B_REG_PLL_SYS,
.shift = 0,
.width = 9,
},
.n = {
.reg_off = MESON8B_REG_PLL_SYS,
.shift = 9,
.width = 5,
},
.od = {
.reg_off = MESON8B_REG_PLL_SYS,
.shift = 16,
.width = 2,
},
.rate_table = sys_pll_rate_table,
.rate_count = ARRAY_SIZE(sys_pll_rate_table),
.lock = &clk_lock,
.hw.init = &(struct clk_init_data){
.name = "sys_pll",
.ops = &meson_clk_pll_ops,
.parent_names = (const char *[]){ "xtal" },
.num_parents = 1,
.flags = CLK_GET_RATE_NOCACHE,
},
};
static const struct clk_conf meson8b_clk_confs[] __initconst = {
PLL(MESON8B_REG_PLL_FIXED, CLKID_PLL_FIXED, "fixed_pll",
p_xtal, 0, &pll_confs),
PLL(MESON8B_REG_PLL_VID, CLKID_PLL_VID, "vid_pll",
p_xtal, 0, &pll_confs),
PLL(MESON8B_REG_PLL_SYS, CLKID_PLL_SYS, "sys_pll",
p_xtal, 0, &sys_pll_conf),
FIXED_FACTOR_DIV(CLKID_FCLK_DIV2, "fclk_div2", p_fclk_div, 0, 2),
FIXED_FACTOR_DIV(CLKID_FCLK_DIV3, "fclk_div3", p_fclk_div, 0, 3),
FIXED_FACTOR_DIV(CLKID_FCLK_DIV4, "fclk_div4", p_fclk_div, 0, 4),
@ -197,14 +257,23 @@ static struct clk_hw_onecell_data meson8b_hw_onecell_data = {
.hws = {
[CLKID_XTAL] = &meson8b_xtal.hw,
[CLKID_ZERO] = &meson8b_zero.hw,
[CLKID_PLL_FIXED] = &meson8b_fixed_pll.hw,
[CLKID_PLL_VID] = &meson8b_vid_pll.hw,
[CLKID_PLL_SYS] = &meson8b_sys_pll.hw,
},
.num = CLK_NR_CLKS,
};
static struct meson_clk_pll *const meson8b_clk_plls[] = {
&meson8b_fixed_pll,
&meson8b_vid_pll,
&meson8b_sys_pll,
};
static void __init meson8b_clkc_init(struct device_node *np)
{
void __iomem *clk_base;
int ret, clkid;
int ret, clkid, i;
if (!meson_clk_init(np, CLK_NR_CLKS))
return;
@ -216,6 +285,10 @@ static void __init meson8b_clkc_init(struct device_node *np)
return;
}
/* Populate base address for PLLs */
for (i = 0; i < ARRAY_SIZE(meson8b_clk_plls); i++)
meson8b_clk_plls[i]->base = clk_base;
/*
* register all clks
* CLKID_UNUSED = 0, so skip it and start with CLKID_XTAL = 1

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