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616 lines
15 KiB
616 lines
15 KiB
/*
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* sec_adc.c
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* Samsung Mobile Battery Driver
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*
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* Copyright (C) 2012 Samsung Electronics
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include "include/sec_adc.h"
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#define DEBUG
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struct adc_list {
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const char *name;
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struct iio_channel *channel;
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bool is_used;
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int prev_value;
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};
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static struct adc_list batt_adc_list[SEC_BAT_ADC_CHANNEL_NUM] = {
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{.name = "adc-cable"},
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{.name = "adc-bat"},
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{.name = "adc-temp"},
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{.name = "adc-temp-amb"},
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{.name = "adc-full"},
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{.name = "adc-volt"},
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{.name = "adc-chg-temp"},
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{.name = "adc-in-bat"},
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{.name = "adc-dischg"},
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{.name = "adc-dischg-ntc"},
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{.name = "adc-wpc-temp"},
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{.name = "adc-slave-chg-temp"},
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{.name = "adc-usb-temp"},
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{.name = "adc-sub-bat"},
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{.name = "adc-blkt-temp"},
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};
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#ifdef CONFIG_SEC_EXT_THERMAL_MONITOR
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static struct sec_battery_info *local_battery;
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#endif /* CONFIG_SEC_EXT_THERMAL_MONITOR */
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static void sec_bat_adc_ap_init(struct platform_device *pdev,
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struct sec_battery_info *battery)
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{
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int i = 0;
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struct iio_channel *temp_adc;
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for (i = 0; i < SEC_BAT_ADC_CHANNEL_NUM; i++) {
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temp_adc = iio_channel_get(&pdev->dev, batt_adc_list[i].name);
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batt_adc_list[i].channel = temp_adc;
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batt_adc_list[i].is_used = !IS_ERR_OR_NULL(temp_adc);
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}
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for (i = 0; i < SEC_BAT_ADC_CHANNEL_NUM; i++)
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pr_info("%s %s - %s\n",
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__func__, batt_adc_list[i].name, batt_adc_list[i].is_used ? "used" : "not used");
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}
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static int sec_bat_adc_ap_read(struct sec_battery_info *battery, int channel)
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{
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int data = -1;
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int ret = 0;
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int retry_cnt = RETRY_CNT;
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if (batt_adc_list[channel].is_used) {
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do {
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if (battery->pdata->temp_channel_raw) {
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ret = (batt_adc_list[channel].is_used) ?
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iio_read_channel_raw(batt_adc_list[channel].channel, &data) : 0;
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retry_cnt--;
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} else {
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ret = (batt_adc_list[channel].is_used) ?
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iio_read_channel_processed(batt_adc_list[channel].channel, &data) : 0;
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retry_cnt--;
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}
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} while ((retry_cnt > 0) && (data < 0));
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}
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if (retry_cnt <= 0) {
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pr_err("%s: Error in ADC\n", __func__);
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data = batt_adc_list[channel].prev_value;
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} else
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batt_adc_list[channel].prev_value = data;
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return data;
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}
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static void sec_bat_adc_ap_exit(void)
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{
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int i = 0;
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for (i = 0; i < SEC_BAT_ADC_CHANNEL_NUM; i++) {
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if (batt_adc_list[i].is_used) {
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iio_channel_release(batt_adc_list[i].channel);
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}
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}
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return;
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}
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static void sec_bat_adc_none_init(struct platform_device *pdev)
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{
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}
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static int sec_bat_adc_none_read(int channel)
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{
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return 0;
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}
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static void sec_bat_adc_none_exit(void)
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{
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}
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static void sec_bat_adc_ic_init(struct platform_device *pdev)
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{
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}
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static int sec_bat_adc_ic_read(int channel)
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{
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return 0;
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}
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static void sec_bat_adc_ic_exit(void)
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{
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}
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static int adc_read_type(struct sec_battery_info *battery, int channel)
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{
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int adc = 0;
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switch (battery->pdata->temp_adc_type) {
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case SEC_BATTERY_ADC_TYPE_NONE:
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adc = sec_bat_adc_none_read(channel);
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break;
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case SEC_BATTERY_ADC_TYPE_AP:
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adc = sec_bat_adc_ap_read(battery, channel);
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break;
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case SEC_BATTERY_ADC_TYPE_IC:
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adc = sec_bat_adc_ic_read(channel);
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break;
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case SEC_BATTERY_ADC_TYPE_NUM:
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break;
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default:
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break;
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}
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pr_debug("[%s] [%d] ADC = %d\n", __func__, channel, adc);
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return adc;
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}
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static void adc_init_type(struct platform_device *pdev,
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struct sec_battery_info *battery)
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{
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switch (battery->pdata->temp_adc_type) {
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case SEC_BATTERY_ADC_TYPE_NONE:
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sec_bat_adc_none_init(pdev);
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break;
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case SEC_BATTERY_ADC_TYPE_AP:
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sec_bat_adc_ap_init(pdev, battery);
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break;
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case SEC_BATTERY_ADC_TYPE_IC:
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sec_bat_adc_ic_init(pdev);
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break;
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case SEC_BATTERY_ADC_TYPE_NUM:
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break;
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default:
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break;
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}
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}
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static void adc_exit_type(struct sec_battery_info *battery)
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{
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switch (battery->pdata->temp_adc_type) {
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case SEC_BATTERY_ADC_TYPE_NONE:
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sec_bat_adc_none_exit();
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break;
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case SEC_BATTERY_ADC_TYPE_AP:
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sec_bat_adc_ap_exit();
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break;
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case SEC_BATTERY_ADC_TYPE_IC:
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sec_bat_adc_ic_exit();
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break;
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case SEC_BATTERY_ADC_TYPE_NUM:
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break;
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default:
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break;
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}
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}
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int sec_bat_get_adc_data(struct sec_battery_info *battery,
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int adc_ch, int count)
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{
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int adc_data = 0;
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int adc_max = 0;
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int adc_min = 0xFFFF;
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int adc_total = 0;
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int i = 0;
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if (count < 3)
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count = 3;
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for (i = 0; i < count; i++) {
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mutex_lock(&battery->adclock);
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#ifdef CONFIG_OF
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adc_data = adc_read_type(battery, adc_ch);
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#else
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adc_data = adc_read_type(battery->pdata, adc_ch);
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#endif
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mutex_unlock(&battery->adclock);
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if (i != 0) {
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if (adc_data > adc_max)
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adc_max = adc_data;
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else if (adc_data < adc_min)
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adc_min = adc_data;
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} else {
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adc_max = adc_data;
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adc_min = adc_data;
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}
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adc_total += adc_data;
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}
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return (adc_total - adc_max - adc_min) / (count - 2);
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}
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int sec_bat_get_charger_type_adc
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(struct sec_battery_info *battery)
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{
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/* It is true something valid is
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connected to the device for charging.
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By default this something is considered to be USB.*/
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int result = SEC_BATTERY_CABLE_USB;
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int adc = 0;
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int i = 0;
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/* Do NOT check cable type when cable_switch_check() returns false
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* and keep current cable type
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*/
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if (battery->pdata->cable_switch_check &&
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!battery->pdata->cable_switch_check())
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return battery->cable_type;
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adc = sec_bat_get_adc_data(battery,
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SEC_BAT_ADC_CHANNEL_CABLE_CHECK,
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battery->pdata->adc_check_count);
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/* Do NOT check cable type when cable_switch_normal() returns false
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* and keep current cable type
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*/
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if (battery->pdata->cable_switch_normal &&
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!battery->pdata->cable_switch_normal())
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return battery->cable_type;
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for (i = 0; i < SEC_BATTERY_CABLE_MAX; i++)
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if ((adc > battery->pdata->cable_adc_value[i].min) &&
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(adc < battery->pdata->cable_adc_value[i].max))
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break;
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if (i >= SEC_BATTERY_CABLE_MAX)
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dev_err(battery->dev,
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"%s : default USB\n", __func__);
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else
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result = i;
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dev_dbg(battery->dev, "%s : result(%d), adc(%d)\n",
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__func__, result, adc);
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return result;
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}
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bool sec_bat_get_value_by_adc(
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struct sec_battery_info *battery,
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enum sec_battery_adc_channel channel,
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union power_supply_propval *value,
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enum sec_battery_temp_check check_type)
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{
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int temp = 0;
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int temp_adc;
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int low = 0;
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int high = 0;
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int mid = 0;
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const sec_bat_adc_table_data_t *temp_adc_table = {0 , };
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unsigned int temp_adc_table_size = 0;
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if (check_type == SEC_BATTERY_TEMP_CHECK_FAKE) {
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value->intval = 300;
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return true;
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}
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temp_adc = sec_bat_get_adc_data(battery, channel, battery->pdata->adc_check_count);
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if ((temp_adc < 0) || (check_type == SEC_BATTERY_TEMP_CHECK_NONE))
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return false;
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switch (channel) {
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case SEC_BAT_ADC_CHANNEL_TEMP:
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temp_adc_table = battery->pdata->temp_adc_table;
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temp_adc_table_size =
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battery->pdata->temp_adc_table_size;
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battery->temp_adc = temp_adc;
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break;
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case SEC_BAT_ADC_CHANNEL_TEMP_AMBIENT:
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temp_adc_table = battery->pdata->temp_amb_adc_table;
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temp_adc_table_size =
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battery->pdata->temp_amb_adc_table_size;
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battery->temp_ambient_adc = temp_adc;
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break;
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case SEC_BAT_ADC_CHANNEL_USB_TEMP:
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temp_adc_table = battery->pdata->usb_temp_adc_table;
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temp_adc_table_size =
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battery->pdata->usb_temp_adc_table_size;
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battery->usb_temp_adc = temp_adc;
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break;
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case SEC_BAT_ADC_CHANNEL_CHG_TEMP:
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temp_adc_table = battery->pdata->chg_temp_adc_table;
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temp_adc_table_size =
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battery->pdata->chg_temp_adc_table_size;
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battery->chg_temp_adc = temp_adc;
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break;
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case SEC_BAT_ADC_CHANNEL_WPC_TEMP:
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temp_adc_table = battery->pdata->wpc_temp_adc_table;
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temp_adc_table_size =
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battery->pdata->wpc_temp_adc_table_size;
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battery->wpc_temp_adc = temp_adc;
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break;
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case SEC_BAT_ADC_CHANNEL_SLAVE_CHG_TEMP:
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temp_adc_table = battery->pdata->slave_chg_temp_adc_table;
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temp_adc_table_size =
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battery->pdata->slave_chg_temp_adc_table_size;
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battery->slave_chg_temp_adc = temp_adc;
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break;
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case SEC_BAT_ADC_CHANNEL_SUB_BAT_TEMP:
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temp_adc_table = battery->pdata->sub_bat_temp_adc_table;
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temp_adc_table_size =
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battery->pdata->sub_bat_temp_adc_table_size;
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battery->sub_bat_temp_adc = temp_adc;
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break;
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case SEC_BAT_ADC_CHANNEL_BLKT_TEMP:
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temp_adc_table = battery->pdata->blkt_temp_adc_table;
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temp_adc_table_size =
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battery->pdata->blkt_temp_adc_table_size;
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battery->blkt_temp_adc = temp_adc;
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break;
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default:
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dev_err(battery->dev,
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"%s: Invalid Property\n", __func__);
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return false;
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}
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if (temp_adc_table[0].adc >= temp_adc) {
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temp = temp_adc_table[0].data;
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goto temp_by_adc_goto;
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} else if (temp_adc_table[temp_adc_table_size-1].adc <= temp_adc) {
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temp = temp_adc_table[temp_adc_table_size-1].data;
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goto temp_by_adc_goto;
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}
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high = temp_adc_table_size - 1;
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while (low <= high) {
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mid = (low + high) / 2;
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if (temp_adc_table[mid].adc > temp_adc)
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high = mid - 1;
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else if (temp_adc_table[mid].adc < temp_adc)
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low = mid + 1;
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else {
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temp = temp_adc_table[mid].data;
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goto temp_by_adc_goto;
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}
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}
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temp = temp_adc_table[high].data;
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temp += ((temp_adc_table[low].data - temp_adc_table[high].data) *
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(temp_adc - temp_adc_table[high].adc)) /
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(temp_adc_table[low].adc - temp_adc_table[high].adc);
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temp_by_adc_goto:
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value->intval = temp;
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dev_info(battery->dev,
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"%s:[%d] Temp(%d), Temp-ADC(%d)\n",
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__func__,channel, temp, temp_adc);
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return true;
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}
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#ifdef CONFIG_SEC_EXT_THERMAL_MONITOR
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int sec_bat_convert_adc_to_temp(unsigned int adc_ch, int temp_adc)
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{
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enum sec_battery_adc_channel channel = 0;
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int temp = 25000;
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int low = 0;
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int high = 0;
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int mid = 0;
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const sec_bat_adc_table_data_t *temp_adc_table = {0 , };
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unsigned int temp_adc_table_size = 0;
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if(!local_battery) {
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pr_info("%s: battery data is not ready yet\n", __func__);
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goto temp_to_adc_goto;
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}
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if (adc_ch == 0x4d)
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channel = SEC_BAT_ADC_CHANNEL_USB_TEMP;
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else if (adc_ch == 0x52)
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channel = SEC_BAT_ADC_CHANNEL_TEMP;
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else
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goto temp_to_adc_goto;
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switch (channel) {
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case SEC_BAT_ADC_CHANNEL_USB_TEMP:
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temp_adc_table = local_battery->pdata->usb_temp_adc_table;
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temp_adc_table_size =
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local_battery->pdata->usb_temp_adc_table_size;
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break;
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case SEC_BAT_ADC_CHANNEL_TEMP:
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temp_adc_table = local_battery->pdata->temp_adc_table;
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temp_adc_table_size =
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local_battery->pdata->temp_adc_table_size;
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break;
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default:
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dev_err(local_battery->dev,
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"%s: Invalid Property\n", __func__);
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goto temp_to_adc_goto;
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}
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if (temp_adc_table[0].adc >= temp_adc) {
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temp = temp_adc_table[0].data;
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goto temp_to_adc_goto;
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} else if (temp_adc_table[temp_adc_table_size-1].adc <= temp_adc) {
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temp = temp_adc_table[temp_adc_table_size-1].data;
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goto temp_to_adc_goto;
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}
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high = temp_adc_table_size - 1;
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while (low <= high) {
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mid = (low + high) / 2;
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if (temp_adc_table[mid].adc > temp_adc)
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high = mid - 1;
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else if (temp_adc_table[mid].adc < temp_adc)
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low = mid + 1;
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else {
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temp = temp_adc_table[mid].data;
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goto temp_to_adc_goto;
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}
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}
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temp = temp_adc_table[high].data;
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temp += ((temp_adc_table[low].data - temp_adc_table[high].data) *
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(temp_adc - temp_adc_table[high].adc)) /
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(temp_adc_table[low].adc - temp_adc_table[high].adc);
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temp_to_adc_goto:
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return (temp == 25000 ? temp : temp * 100);
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}
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EXPORT_SYMBOL(sec_bat_convert_adc_to_temp);
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int sec_bat_get_thr_voltage(unsigned int adc_ch, int temp)
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{
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enum sec_battery_adc_channel channel = 0;
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int volt = 0;
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int low = 0;
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int high = 0;
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int mid = 0;
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const sec_bat_adc_table_data_t *temp_adc_table = {0 , };
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unsigned int temp_adc_table_size = 0;
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if(!local_battery) {
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pr_info("%s: battery data is not ready yet\n", __func__);
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goto get_thr_voltage_goto;
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}
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if (adc_ch == 0x4d)
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channel = SEC_BAT_ADC_CHANNEL_USB_TEMP;
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else if (adc_ch == 0x52)
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channel = SEC_BAT_ADC_CHANNEL_TEMP;
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else
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goto get_thr_voltage_goto;
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switch (channel) {
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case SEC_BAT_ADC_CHANNEL_USB_TEMP:
|
|
temp_adc_table = local_battery->pdata->usb_temp_adc_table;
|
|
temp_adc_table_size =
|
|
local_battery->pdata->usb_temp_adc_table_size;
|
|
break;
|
|
case SEC_BAT_ADC_CHANNEL_TEMP:
|
|
temp_adc_table = local_battery->pdata->temp_adc_table;
|
|
temp_adc_table_size =
|
|
local_battery->pdata->temp_adc_table_size;
|
|
break;
|
|
default:
|
|
dev_err(local_battery->dev,
|
|
"%s: Invalid Property\n", __func__);
|
|
goto get_thr_voltage_goto;
|
|
}
|
|
|
|
if (temp > 900 || temp < -200) {
|
|
dev_err(local_battery->dev,
|
|
"%s: unsupported temperature\n", __func__);
|
|
goto get_thr_voltage_goto;
|
|
}
|
|
|
|
high = temp_adc_table_size - 1;
|
|
|
|
while (low <= high) {
|
|
mid = (low + high) / 2;
|
|
if (temp_adc_table[mid].data < temp)
|
|
high = mid - 1;
|
|
else if (temp_adc_table[mid].data > temp)
|
|
low = mid + 1;
|
|
else {
|
|
volt = temp_adc_table[mid].adc / 1000;
|
|
goto get_thr_voltage_goto;
|
|
}
|
|
}
|
|
|
|
volt = temp_adc_table[mid].adc / 1000;
|
|
|
|
get_thr_voltage_goto:
|
|
return volt;
|
|
}
|
|
EXPORT_SYMBOL(sec_bat_get_thr_voltage);
|
|
#endif /* CONFIG_SEC_EXT_THERMAL_MONITOR */
|
|
|
|
bool sec_bat_check_vf_adc(struct sec_battery_info *battery)
|
|
{
|
|
int adc = 0;
|
|
|
|
adc = sec_bat_get_adc_data(battery,
|
|
SEC_BAT_ADC_CHANNEL_BAT_CHECK,
|
|
battery->pdata->adc_check_count);
|
|
|
|
if (adc < 0) {
|
|
dev_err(battery->dev, "%s: VF ADC error\n", __func__);
|
|
adc = battery->check_adc_value;
|
|
} else
|
|
battery->check_adc_value = adc;
|
|
|
|
if ((battery->check_adc_value <= battery->pdata->check_adc_max) &&
|
|
(battery->check_adc_value >= battery->pdata->check_adc_min)) {
|
|
return true;
|
|
} else {
|
|
dev_info(battery->dev, "%s: adc (%d)\n", __func__, battery->check_adc_value);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
#if defined(CONFIG_DIRECT_CHARGING)
|
|
int sec_bat_get_direct_chg_temp_adc(struct sec_battery_info *battery,
|
|
int adc_data, int count)
|
|
{
|
|
int temp = 0;
|
|
int temp_adc;
|
|
int low = 0;
|
|
int high = 0;
|
|
int mid = 0;
|
|
const sec_bat_adc_table_data_t *temp_adc_table = {0 , };
|
|
unsigned int temp_adc_table_size = 0;
|
|
|
|
temp_adc = adc_data;
|
|
if (temp_adc < 0)
|
|
return 0;
|
|
|
|
temp_adc_table = battery->pdata->dchg_temp_adc_table;
|
|
temp_adc_table_size =
|
|
battery->pdata->dchg_temp_adc_table_size;
|
|
battery->dchg_temp_adc = temp_adc;
|
|
|
|
if (temp_adc_table[0].adc >= temp_adc) {
|
|
temp = temp_adc_table[0].data;
|
|
goto direct_chg_temp_goto;
|
|
} else if (temp_adc_table[temp_adc_table_size-1].adc <= temp_adc) {
|
|
temp = temp_adc_table[temp_adc_table_size-1].data;
|
|
goto direct_chg_temp_goto;
|
|
}
|
|
|
|
high = temp_adc_table_size - 1;
|
|
while (low <= high) {
|
|
mid = (low + high) / 2;
|
|
if (temp_adc_table[mid].adc > temp_adc)
|
|
high = mid - 1;
|
|
else if (temp_adc_table[mid].adc < temp_adc)
|
|
low = mid + 1;
|
|
else {
|
|
temp = temp_adc_table[mid].data;
|
|
goto direct_chg_temp_goto;
|
|
}
|
|
}
|
|
|
|
temp = temp_adc_table[high].data;
|
|
temp += ((temp_adc_table[low].data - temp_adc_table[high].data) *
|
|
(temp_adc - temp_adc_table[high].adc)) /
|
|
(temp_adc_table[low].adc - temp_adc_table[high].adc);
|
|
|
|
direct_chg_temp_goto:
|
|
dev_info(battery->dev,
|
|
"%s: temp(%d), direct-chg-temp-ADC(%d)\n",
|
|
__func__, temp, temp_adc);
|
|
|
|
return temp;
|
|
}
|
|
#endif
|
|
|
|
void adc_init(struct platform_device *pdev, struct sec_battery_info *battery)
|
|
{
|
|
adc_init_type(pdev, battery);
|
|
#ifdef CONFIG_SEC_EXT_THERMAL_MONITOR
|
|
local_battery = battery;
|
|
#endif /* CONFIG_SEC_EXT_THERMAL_MONITOR */
|
|
}
|
|
|
|
void adc_exit(struct sec_battery_info *battery)
|
|
{
|
|
adc_exit_type(battery);
|
|
}
|
|
|