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1358 lines
35 KiB
1358 lines
35 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// Copyright (C) 2018 Spreadtrum Communications Inc. |
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#include <linux/gpio/consumer.h> |
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#include <linux/iio/consumer.h> |
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#include <linux/interrupt.h> |
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#include <linux/kernel.h> |
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#include <linux/math64.h> |
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#include <linux/module.h> |
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#include <linux/nvmem-consumer.h> |
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#include <linux/of.h> |
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#include <linux/platform_device.h> |
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#include <linux/power_supply.h> |
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#include <linux/regmap.h> |
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#include <linux/slab.h> |
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/* PMIC global control registers definition */ |
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#define SC27XX_MODULE_EN0 0xc08 |
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#define SC27XX_CLK_EN0 0xc18 |
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#define SC27XX_FGU_EN BIT(7) |
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#define SC27XX_FGU_RTC_EN BIT(6) |
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/* FGU registers definition */ |
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#define SC27XX_FGU_START 0x0 |
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#define SC27XX_FGU_CONFIG 0x4 |
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#define SC27XX_FGU_ADC_CONFIG 0x8 |
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#define SC27XX_FGU_STATUS 0xc |
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#define SC27XX_FGU_INT_EN 0x10 |
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#define SC27XX_FGU_INT_CLR 0x14 |
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#define SC27XX_FGU_INT_STS 0x1c |
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#define SC27XX_FGU_VOLTAGE 0x20 |
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#define SC27XX_FGU_OCV 0x24 |
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#define SC27XX_FGU_POCV 0x28 |
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#define SC27XX_FGU_CURRENT 0x2c |
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#define SC27XX_FGU_LOW_OVERLOAD 0x34 |
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#define SC27XX_FGU_CLBCNT_SETH 0x50 |
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#define SC27XX_FGU_CLBCNT_SETL 0x54 |
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#define SC27XX_FGU_CLBCNT_DELTH 0x58 |
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#define SC27XX_FGU_CLBCNT_DELTL 0x5c |
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#define SC27XX_FGU_CLBCNT_VALH 0x68 |
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#define SC27XX_FGU_CLBCNT_VALL 0x6c |
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#define SC27XX_FGU_CLBCNT_QMAXL 0x74 |
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#define SC27XX_FGU_USER_AREA_SET 0xa0 |
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#define SC27XX_FGU_USER_AREA_CLEAR 0xa4 |
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#define SC27XX_FGU_USER_AREA_STATUS 0xa8 |
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#define SC27XX_FGU_VOLTAGE_BUF 0xd0 |
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#define SC27XX_FGU_CURRENT_BUF 0xf0 |
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#define SC27XX_WRITE_SELCLB_EN BIT(0) |
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#define SC27XX_FGU_CLBCNT_MASK GENMASK(15, 0) |
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#define SC27XX_FGU_CLBCNT_SHIFT 16 |
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#define SC27XX_FGU_LOW_OVERLOAD_MASK GENMASK(12, 0) |
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#define SC27XX_FGU_INT_MASK GENMASK(9, 0) |
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#define SC27XX_FGU_LOW_OVERLOAD_INT BIT(0) |
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#define SC27XX_FGU_CLBCNT_DELTA_INT BIT(2) |
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#define SC27XX_FGU_MODE_AREA_MASK GENMASK(15, 12) |
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#define SC27XX_FGU_CAP_AREA_MASK GENMASK(11, 0) |
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#define SC27XX_FGU_MODE_AREA_SHIFT 12 |
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#define SC27XX_FGU_FIRST_POWERTON GENMASK(3, 0) |
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#define SC27XX_FGU_DEFAULT_CAP GENMASK(11, 0) |
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#define SC27XX_FGU_NORMAIL_POWERTON 0x5 |
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#define SC27XX_FGU_CUR_BASIC_ADC 8192 |
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#define SC27XX_FGU_SAMPLE_HZ 2 |
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/* micro Ohms */ |
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#define SC27XX_FGU_IDEAL_RESISTANCE 20000 |
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/* |
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* struct sc27xx_fgu_data: describe the FGU device |
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* @regmap: regmap for register access |
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* @dev: platform device |
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* @battery: battery power supply |
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* @base: the base offset for the controller |
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* @lock: protect the structure |
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* @gpiod: GPIO for battery detection |
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* @channel: IIO channel to get battery temperature |
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* @charge_chan: IIO channel to get charge voltage |
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* @internal_resist: the battery internal resistance in mOhm |
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* @total_cap: the total capacity of the battery in mAh |
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* @init_cap: the initial capacity of the battery in mAh |
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* @alarm_cap: the alarm capacity |
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* @init_clbcnt: the initial coulomb counter |
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* @max_volt: the maximum constant input voltage in millivolt |
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* @min_volt: the minimum drained battery voltage in microvolt |
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* @boot_volt: the voltage measured during boot in microvolt |
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* @table_len: the capacity table length |
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* @resist_table_len: the resistance table length |
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* @cur_1000ma_adc: ADC value corresponding to 1000 mA |
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* @vol_1000mv_adc: ADC value corresponding to 1000 mV |
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* @calib_resist: the real resistance of coulomb counter chip in uOhm |
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* @cap_table: capacity table with corresponding ocv |
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* @resist_table: resistance percent table with corresponding temperature |
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*/ |
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struct sc27xx_fgu_data { |
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struct regmap *regmap; |
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struct device *dev; |
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struct power_supply *battery; |
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u32 base; |
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struct mutex lock; |
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struct gpio_desc *gpiod; |
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struct iio_channel *channel; |
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struct iio_channel *charge_chan; |
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bool bat_present; |
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int internal_resist; |
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int total_cap; |
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int init_cap; |
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int alarm_cap; |
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int init_clbcnt; |
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int max_volt; |
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int min_volt; |
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int boot_volt; |
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int table_len; |
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int resist_table_len; |
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int cur_1000ma_adc; |
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int vol_1000mv_adc; |
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int calib_resist; |
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struct power_supply_battery_ocv_table *cap_table; |
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struct power_supply_resistance_temp_table *resist_table; |
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}; |
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static int sc27xx_fgu_cap_to_clbcnt(struct sc27xx_fgu_data *data, int capacity); |
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static void sc27xx_fgu_capacity_calibration(struct sc27xx_fgu_data *data, |
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int cap, bool int_mode); |
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static void sc27xx_fgu_adjust_cap(struct sc27xx_fgu_data *data, int cap); |
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static int sc27xx_fgu_get_temp(struct sc27xx_fgu_data *data, int *temp); |
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static const char * const sc27xx_charger_supply_name[] = { |
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"sc2731_charger", |
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"sc2720_charger", |
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"sc2721_charger", |
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"sc2723_charger", |
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}; |
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static int sc27xx_fgu_adc_to_current(struct sc27xx_fgu_data *data, s64 adc) |
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{ |
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return DIV_S64_ROUND_CLOSEST(adc * 1000, data->cur_1000ma_adc); |
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} |
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static int sc27xx_fgu_adc_to_voltage(struct sc27xx_fgu_data *data, s64 adc) |
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{ |
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return DIV_S64_ROUND_CLOSEST(adc * 1000, data->vol_1000mv_adc); |
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} |
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static int sc27xx_fgu_voltage_to_adc(struct sc27xx_fgu_data *data, int vol) |
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{ |
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return DIV_ROUND_CLOSEST(vol * data->vol_1000mv_adc, 1000); |
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} |
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static bool sc27xx_fgu_is_first_poweron(struct sc27xx_fgu_data *data) |
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{ |
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int ret, status, cap, mode; |
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ret = regmap_read(data->regmap, |
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data->base + SC27XX_FGU_USER_AREA_STATUS, &status); |
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if (ret) |
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return false; |
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/* |
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* We use low 4 bits to save the last battery capacity and high 12 bits |
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* to save the system boot mode. |
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*/ |
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mode = (status & SC27XX_FGU_MODE_AREA_MASK) >> SC27XX_FGU_MODE_AREA_SHIFT; |
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cap = status & SC27XX_FGU_CAP_AREA_MASK; |
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/* |
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* When FGU has been powered down, the user area registers became |
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* default value (0xffff), which can be used to valid if the system is |
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* first power on or not. |
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*/ |
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if (mode == SC27XX_FGU_FIRST_POWERTON || cap == SC27XX_FGU_DEFAULT_CAP) |
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return true; |
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return false; |
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} |
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static int sc27xx_fgu_save_boot_mode(struct sc27xx_fgu_data *data, |
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int boot_mode) |
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{ |
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int ret; |
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ret = regmap_update_bits(data->regmap, |
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data->base + SC27XX_FGU_USER_AREA_CLEAR, |
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SC27XX_FGU_MODE_AREA_MASK, |
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SC27XX_FGU_MODE_AREA_MASK); |
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if (ret) |
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return ret; |
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/* |
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* Since the user area registers are put on power always-on region, |
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* then these registers changing time will be a little long. Thus |
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* here we should delay 200us to wait until values are updated |
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* successfully according to the datasheet. |
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*/ |
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udelay(200); |
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ret = regmap_update_bits(data->regmap, |
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data->base + SC27XX_FGU_USER_AREA_SET, |
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SC27XX_FGU_MODE_AREA_MASK, |
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boot_mode << SC27XX_FGU_MODE_AREA_SHIFT); |
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if (ret) |
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return ret; |
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/* |
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* Since the user area registers are put on power always-on region, |
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* then these registers changing time will be a little long. Thus |
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* here we should delay 200us to wait until values are updated |
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* successfully according to the datasheet. |
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*/ |
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udelay(200); |
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/* |
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* According to the datasheet, we should set the USER_AREA_CLEAR to 0 to |
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* make the user area data available, otherwise we can not save the user |
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* area data. |
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*/ |
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return regmap_update_bits(data->regmap, |
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data->base + SC27XX_FGU_USER_AREA_CLEAR, |
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SC27XX_FGU_MODE_AREA_MASK, 0); |
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} |
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static int sc27xx_fgu_save_last_cap(struct sc27xx_fgu_data *data, int cap) |
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{ |
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int ret; |
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ret = regmap_update_bits(data->regmap, |
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data->base + SC27XX_FGU_USER_AREA_CLEAR, |
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SC27XX_FGU_CAP_AREA_MASK, |
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SC27XX_FGU_CAP_AREA_MASK); |
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if (ret) |
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return ret; |
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/* |
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* Since the user area registers are put on power always-on region, |
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* then these registers changing time will be a little long. Thus |
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* here we should delay 200us to wait until values are updated |
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* successfully according to the datasheet. |
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*/ |
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udelay(200); |
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ret = regmap_update_bits(data->regmap, |
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data->base + SC27XX_FGU_USER_AREA_SET, |
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SC27XX_FGU_CAP_AREA_MASK, cap); |
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if (ret) |
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return ret; |
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/* |
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* Since the user area registers are put on power always-on region, |
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* then these registers changing time will be a little long. Thus |
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* here we should delay 200us to wait until values are updated |
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* successfully according to the datasheet. |
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*/ |
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udelay(200); |
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/* |
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* According to the datasheet, we should set the USER_AREA_CLEAR to 0 to |
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* make the user area data available, otherwise we can not save the user |
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* area data. |
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*/ |
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return regmap_update_bits(data->regmap, |
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data->base + SC27XX_FGU_USER_AREA_CLEAR, |
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SC27XX_FGU_CAP_AREA_MASK, 0); |
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} |
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static int sc27xx_fgu_read_last_cap(struct sc27xx_fgu_data *data, int *cap) |
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{ |
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int ret, value; |
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ret = regmap_read(data->regmap, |
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data->base + SC27XX_FGU_USER_AREA_STATUS, &value); |
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if (ret) |
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return ret; |
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*cap = value & SC27XX_FGU_CAP_AREA_MASK; |
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return 0; |
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} |
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/* |
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* When system boots on, we can not read battery capacity from coulomb |
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* registers, since now the coulomb registers are invalid. So we should |
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* calculate the battery open circuit voltage, and get current battery |
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* capacity according to the capacity table. |
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*/ |
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static int sc27xx_fgu_get_boot_capacity(struct sc27xx_fgu_data *data, int *cap) |
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{ |
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int volt, cur, oci, ocv, ret; |
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bool is_first_poweron = sc27xx_fgu_is_first_poweron(data); |
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/* |
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* If system is not the first power on, we should use the last saved |
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* battery capacity as the initial battery capacity. Otherwise we should |
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* re-calculate the initial battery capacity. |
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*/ |
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if (!is_first_poweron) { |
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ret = sc27xx_fgu_read_last_cap(data, cap); |
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if (ret) |
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return ret; |
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return sc27xx_fgu_save_boot_mode(data, SC27XX_FGU_NORMAIL_POWERTON); |
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} |
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/* |
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* After system booting on, the SC27XX_FGU_CLBCNT_QMAXL register saved |
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* the first sampled open circuit current. |
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*/ |
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ret = regmap_read(data->regmap, data->base + SC27XX_FGU_CLBCNT_QMAXL, |
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&cur); |
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if (ret) |
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return ret; |
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cur <<= 1; |
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oci = sc27xx_fgu_adc_to_current(data, cur - SC27XX_FGU_CUR_BASIC_ADC); |
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/* |
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* Should get the OCV from SC27XX_FGU_POCV register at the system |
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* beginning. It is ADC values reading from registers which need to |
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* convert the corresponding voltage. |
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*/ |
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ret = regmap_read(data->regmap, data->base + SC27XX_FGU_POCV, &volt); |
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if (ret) |
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return ret; |
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volt = sc27xx_fgu_adc_to_voltage(data, volt); |
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ocv = volt * 1000 - oci * data->internal_resist; |
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data->boot_volt = ocv; |
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/* |
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* Parse the capacity table to look up the correct capacity percent |
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* according to current battery's corresponding OCV values. |
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*/ |
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*cap = power_supply_ocv2cap_simple(data->cap_table, data->table_len, |
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ocv); |
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ret = sc27xx_fgu_save_last_cap(data, *cap); |
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if (ret) |
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return ret; |
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return sc27xx_fgu_save_boot_mode(data, SC27XX_FGU_NORMAIL_POWERTON); |
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} |
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static int sc27xx_fgu_set_clbcnt(struct sc27xx_fgu_data *data, int clbcnt) |
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{ |
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int ret; |
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ret = regmap_update_bits(data->regmap, |
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data->base + SC27XX_FGU_CLBCNT_SETL, |
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SC27XX_FGU_CLBCNT_MASK, clbcnt); |
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if (ret) |
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return ret; |
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ret = regmap_update_bits(data->regmap, |
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data->base + SC27XX_FGU_CLBCNT_SETH, |
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SC27XX_FGU_CLBCNT_MASK, |
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clbcnt >> SC27XX_FGU_CLBCNT_SHIFT); |
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if (ret) |
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return ret; |
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return regmap_update_bits(data->regmap, data->base + SC27XX_FGU_START, |
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SC27XX_WRITE_SELCLB_EN, |
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SC27XX_WRITE_SELCLB_EN); |
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} |
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static int sc27xx_fgu_get_clbcnt(struct sc27xx_fgu_data *data, int *clb_cnt) |
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{ |
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int ccl, cch, ret; |
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ret = regmap_read(data->regmap, data->base + SC27XX_FGU_CLBCNT_VALL, |
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&ccl); |
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if (ret) |
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return ret; |
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ret = regmap_read(data->regmap, data->base + SC27XX_FGU_CLBCNT_VALH, |
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&cch); |
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if (ret) |
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return ret; |
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*clb_cnt = ccl & SC27XX_FGU_CLBCNT_MASK; |
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*clb_cnt |= (cch & SC27XX_FGU_CLBCNT_MASK) << SC27XX_FGU_CLBCNT_SHIFT; |
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return 0; |
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} |
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static int sc27xx_fgu_get_vol_now(struct sc27xx_fgu_data *data, int *val) |
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{ |
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int ret; |
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u32 vol; |
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ret = regmap_read(data->regmap, data->base + SC27XX_FGU_VOLTAGE_BUF, |
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&vol); |
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if (ret) |
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return ret; |
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/* |
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* It is ADC values reading from registers which need to convert to |
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* corresponding voltage values. |
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*/ |
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*val = sc27xx_fgu_adc_to_voltage(data, vol); |
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return 0; |
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} |
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static int sc27xx_fgu_get_cur_now(struct sc27xx_fgu_data *data, int *val) |
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{ |
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int ret; |
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u32 cur; |
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ret = regmap_read(data->regmap, data->base + SC27XX_FGU_CURRENT_BUF, |
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&cur); |
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if (ret) |
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return ret; |
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/* |
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* It is ADC values reading from registers which need to convert to |
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* corresponding current values. |
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*/ |
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*val = sc27xx_fgu_adc_to_current(data, cur - SC27XX_FGU_CUR_BASIC_ADC); |
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return 0; |
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} |
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static int sc27xx_fgu_get_capacity(struct sc27xx_fgu_data *data, int *cap) |
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{ |
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int ret, cur_clbcnt, delta_clbcnt, delta_cap, temp; |
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/* Get current coulomb counters firstly */ |
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ret = sc27xx_fgu_get_clbcnt(data, &cur_clbcnt); |
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if (ret) |
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return ret; |
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delta_clbcnt = cur_clbcnt - data->init_clbcnt; |
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/* |
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* Convert coulomb counter to delta capacity (mAh), and set multiplier |
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* as 10 to improve the precision. |
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*/ |
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temp = DIV_ROUND_CLOSEST(delta_clbcnt * 10, 36 * SC27XX_FGU_SAMPLE_HZ); |
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temp = sc27xx_fgu_adc_to_current(data, temp / 1000); |
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/* |
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* Convert to capacity percent of the battery total capacity, |
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* and multiplier is 100 too. |
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*/ |
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delta_cap = DIV_ROUND_CLOSEST(temp * 100, data->total_cap); |
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*cap = delta_cap + data->init_cap; |
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/* Calibrate the battery capacity in a normal range. */ |
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sc27xx_fgu_capacity_calibration(data, *cap, false); |
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return 0; |
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} |
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static int sc27xx_fgu_get_vbat_vol(struct sc27xx_fgu_data *data, int *val) |
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{ |
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int ret, vol; |
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ret = regmap_read(data->regmap, data->base + SC27XX_FGU_VOLTAGE, &vol); |
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if (ret) |
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return ret; |
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|
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/* |
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* It is ADC values reading from registers which need to convert to |
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* corresponding voltage values. |
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*/ |
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*val = sc27xx_fgu_adc_to_voltage(data, vol); |
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return 0; |
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} |
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static int sc27xx_fgu_get_current(struct sc27xx_fgu_data *data, int *val) |
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{ |
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int ret, cur; |
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ret = regmap_read(data->regmap, data->base + SC27XX_FGU_CURRENT, &cur); |
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if (ret) |
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return ret; |
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/* |
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* It is ADC values reading from registers which need to convert to |
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* corresponding current values. |
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*/ |
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*val = sc27xx_fgu_adc_to_current(data, cur - SC27XX_FGU_CUR_BASIC_ADC); |
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return 0; |
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} |
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static int sc27xx_fgu_get_vbat_ocv(struct sc27xx_fgu_data *data, int *val) |
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{ |
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int vol, cur, ret, temp, resistance; |
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ret = sc27xx_fgu_get_vbat_vol(data, &vol); |
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if (ret) |
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return ret; |
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ret = sc27xx_fgu_get_current(data, &cur); |
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if (ret) |
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return ret; |
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resistance = data->internal_resist; |
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if (data->resist_table_len > 0) { |
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ret = sc27xx_fgu_get_temp(data, &temp); |
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if (ret) |
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return ret; |
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resistance = power_supply_temp2resist_simple(data->resist_table, |
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data->resist_table_len, temp); |
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resistance = data->internal_resist * resistance / 100; |
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} |
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/* Return the battery OCV in micro volts. */ |
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*val = vol * 1000 - cur * resistance; |
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return 0; |
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} |
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static int sc27xx_fgu_get_charge_vol(struct sc27xx_fgu_data *data, int *val) |
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{ |
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int ret, vol; |
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ret = iio_read_channel_processed(data->charge_chan, &vol); |
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if (ret < 0) |
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return ret; |
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*val = vol * 1000; |
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return 0; |
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} |
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|
|
static int sc27xx_fgu_get_temp(struct sc27xx_fgu_data *data, int *temp) |
|
{ |
|
return iio_read_channel_processed(data->channel, temp); |
|
} |
|
|
|
static int sc27xx_fgu_get_health(struct sc27xx_fgu_data *data, int *health) |
|
{ |
|
int ret, vol; |
|
|
|
ret = sc27xx_fgu_get_vbat_vol(data, &vol); |
|
if (ret) |
|
return ret; |
|
|
|
if (vol > data->max_volt) |
|
*health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; |
|
else |
|
*health = POWER_SUPPLY_HEALTH_GOOD; |
|
|
|
return 0; |
|
} |
|
|
|
static int sc27xx_fgu_get_status(struct sc27xx_fgu_data *data, int *status) |
|
{ |
|
union power_supply_propval val; |
|
struct power_supply *psy; |
|
int i, ret = -EINVAL; |
|
|
|
for (i = 0; i < ARRAY_SIZE(sc27xx_charger_supply_name); i++) { |
|
psy = power_supply_get_by_name(sc27xx_charger_supply_name[i]); |
|
if (!psy) |
|
continue; |
|
|
|
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_STATUS, |
|
&val); |
|
power_supply_put(psy); |
|
if (ret) |
|
return ret; |
|
|
|
*status = val.intval; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int sc27xx_fgu_get_property(struct power_supply *psy, |
|
enum power_supply_property psp, |
|
union power_supply_propval *val) |
|
{ |
|
struct sc27xx_fgu_data *data = power_supply_get_drvdata(psy); |
|
int ret = 0; |
|
int value; |
|
|
|
mutex_lock(&data->lock); |
|
|
|
switch (psp) { |
|
case POWER_SUPPLY_PROP_STATUS: |
|
ret = sc27xx_fgu_get_status(data, &value); |
|
if (ret) |
|
goto error; |
|
|
|
val->intval = value; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_HEALTH: |
|
ret = sc27xx_fgu_get_health(data, &value); |
|
if (ret) |
|
goto error; |
|
|
|
val->intval = value; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_PRESENT: |
|
val->intval = data->bat_present; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_TEMP: |
|
ret = sc27xx_fgu_get_temp(data, &value); |
|
if (ret) |
|
goto error; |
|
|
|
val->intval = value; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_TECHNOLOGY: |
|
val->intval = POWER_SUPPLY_TECHNOLOGY_LION; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_CAPACITY: |
|
ret = sc27xx_fgu_get_capacity(data, &value); |
|
if (ret) |
|
goto error; |
|
|
|
val->intval = value; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_VOLTAGE_AVG: |
|
ret = sc27xx_fgu_get_vbat_vol(data, &value); |
|
if (ret) |
|
goto error; |
|
|
|
val->intval = value * 1000; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_VOLTAGE_OCV: |
|
ret = sc27xx_fgu_get_vbat_ocv(data, &value); |
|
if (ret) |
|
goto error; |
|
|
|
val->intval = value; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: |
|
ret = sc27xx_fgu_get_charge_vol(data, &value); |
|
if (ret) |
|
goto error; |
|
|
|
val->intval = value; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_CURRENT_AVG: |
|
ret = sc27xx_fgu_get_current(data, &value); |
|
if (ret) |
|
goto error; |
|
|
|
val->intval = value * 1000; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: |
|
val->intval = data->total_cap * 1000; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_CHARGE_NOW: |
|
ret = sc27xx_fgu_get_clbcnt(data, &value); |
|
if (ret) |
|
goto error; |
|
|
|
value = DIV_ROUND_CLOSEST(value * 10, |
|
36 * SC27XX_FGU_SAMPLE_HZ); |
|
val->intval = sc27xx_fgu_adc_to_current(data, value); |
|
|
|
break; |
|
|
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
|
ret = sc27xx_fgu_get_vol_now(data, &value); |
|
if (ret) |
|
goto error; |
|
|
|
val->intval = value * 1000; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_CURRENT_NOW: |
|
ret = sc27xx_fgu_get_cur_now(data, &value); |
|
if (ret) |
|
goto error; |
|
|
|
val->intval = value * 1000; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_VOLTAGE_BOOT: |
|
val->intval = data->boot_volt; |
|
break; |
|
|
|
default: |
|
ret = -EINVAL; |
|
break; |
|
} |
|
|
|
error: |
|
mutex_unlock(&data->lock); |
|
return ret; |
|
} |
|
|
|
static int sc27xx_fgu_set_property(struct power_supply *psy, |
|
enum power_supply_property psp, |
|
const union power_supply_propval *val) |
|
{ |
|
struct sc27xx_fgu_data *data = power_supply_get_drvdata(psy); |
|
int ret; |
|
|
|
mutex_lock(&data->lock); |
|
|
|
switch (psp) { |
|
case POWER_SUPPLY_PROP_CAPACITY: |
|
ret = sc27xx_fgu_save_last_cap(data, val->intval); |
|
if (ret < 0) |
|
dev_err(data->dev, "failed to save battery capacity\n"); |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_CALIBRATE: |
|
sc27xx_fgu_adjust_cap(data, val->intval); |
|
ret = 0; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: |
|
data->total_cap = val->intval / 1000; |
|
ret = 0; |
|
break; |
|
|
|
default: |
|
ret = -EINVAL; |
|
} |
|
|
|
mutex_unlock(&data->lock); |
|
|
|
return ret; |
|
} |
|
|
|
static void sc27xx_fgu_external_power_changed(struct power_supply *psy) |
|
{ |
|
struct sc27xx_fgu_data *data = power_supply_get_drvdata(psy); |
|
|
|
power_supply_changed(data->battery); |
|
} |
|
|
|
static int sc27xx_fgu_property_is_writeable(struct power_supply *psy, |
|
enum power_supply_property psp) |
|
{ |
|
return psp == POWER_SUPPLY_PROP_CAPACITY || |
|
psp == POWER_SUPPLY_PROP_CALIBRATE || |
|
psp == POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN; |
|
} |
|
|
|
static enum power_supply_property sc27xx_fgu_props[] = { |
|
POWER_SUPPLY_PROP_STATUS, |
|
POWER_SUPPLY_PROP_HEALTH, |
|
POWER_SUPPLY_PROP_PRESENT, |
|
POWER_SUPPLY_PROP_TEMP, |
|
POWER_SUPPLY_PROP_TECHNOLOGY, |
|
POWER_SUPPLY_PROP_CAPACITY, |
|
POWER_SUPPLY_PROP_VOLTAGE_NOW, |
|
POWER_SUPPLY_PROP_VOLTAGE_OCV, |
|
POWER_SUPPLY_PROP_VOLTAGE_AVG, |
|
POWER_SUPPLY_PROP_VOLTAGE_BOOT, |
|
POWER_SUPPLY_PROP_CURRENT_NOW, |
|
POWER_SUPPLY_PROP_CURRENT_AVG, |
|
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, |
|
POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
|
POWER_SUPPLY_PROP_CALIBRATE, |
|
POWER_SUPPLY_PROP_CHARGE_NOW |
|
}; |
|
|
|
static const struct power_supply_desc sc27xx_fgu_desc = { |
|
.name = "sc27xx-fgu", |
|
.type = POWER_SUPPLY_TYPE_BATTERY, |
|
.properties = sc27xx_fgu_props, |
|
.num_properties = ARRAY_SIZE(sc27xx_fgu_props), |
|
.get_property = sc27xx_fgu_get_property, |
|
.set_property = sc27xx_fgu_set_property, |
|
.external_power_changed = sc27xx_fgu_external_power_changed, |
|
.property_is_writeable = sc27xx_fgu_property_is_writeable, |
|
.no_thermal = true, |
|
}; |
|
|
|
static void sc27xx_fgu_adjust_cap(struct sc27xx_fgu_data *data, int cap) |
|
{ |
|
int ret; |
|
|
|
data->init_cap = cap; |
|
ret = sc27xx_fgu_get_clbcnt(data, &data->init_clbcnt); |
|
if (ret) |
|
dev_err(data->dev, "failed to get init coulomb counter\n"); |
|
} |
|
|
|
static void sc27xx_fgu_capacity_calibration(struct sc27xx_fgu_data *data, |
|
int cap, bool int_mode) |
|
{ |
|
int ret, ocv, chg_sts, adc; |
|
|
|
ret = sc27xx_fgu_get_vbat_ocv(data, &ocv); |
|
if (ret) { |
|
dev_err(data->dev, "get battery ocv error.\n"); |
|
return; |
|
} |
|
|
|
ret = sc27xx_fgu_get_status(data, &chg_sts); |
|
if (ret) { |
|
dev_err(data->dev, "get charger status error.\n"); |
|
return; |
|
} |
|
|
|
/* |
|
* If we are in charging mode, then we do not need to calibrate the |
|
* lower capacity. |
|
*/ |
|
if (chg_sts == POWER_SUPPLY_STATUS_CHARGING) |
|
return; |
|
|
|
if ((ocv > data->cap_table[0].ocv && cap < 100) || cap > 100) { |
|
/* |
|
* If current OCV value is larger than the max OCV value in |
|
* OCV table, or the current capacity is larger than 100, |
|
* we should force the inititial capacity to 100. |
|
*/ |
|
sc27xx_fgu_adjust_cap(data, 100); |
|
} else if (ocv <= data->cap_table[data->table_len - 1].ocv) { |
|
/* |
|
* If current OCV value is leass than the minimum OCV value in |
|
* OCV table, we should force the inititial capacity to 0. |
|
*/ |
|
sc27xx_fgu_adjust_cap(data, 0); |
|
} else if ((ocv > data->cap_table[data->table_len - 1].ocv && cap <= 0) || |
|
(ocv > data->min_volt && cap <= data->alarm_cap)) { |
|
/* |
|
* If current OCV value is not matchable with current capacity, |
|
* we should re-calculate current capacity by looking up the |
|
* OCV table. |
|
*/ |
|
int cur_cap = power_supply_ocv2cap_simple(data->cap_table, |
|
data->table_len, ocv); |
|
|
|
sc27xx_fgu_adjust_cap(data, cur_cap); |
|
} else if (ocv <= data->min_volt) { |
|
/* |
|
* If current OCV value is less than the low alarm voltage, but |
|
* current capacity is larger than the alarm capacity, we should |
|
* adjust the inititial capacity to alarm capacity. |
|
*/ |
|
if (cap > data->alarm_cap) { |
|
sc27xx_fgu_adjust_cap(data, data->alarm_cap); |
|
} else { |
|
int cur_cap; |
|
|
|
/* |
|
* If current capacity is equal with 0 or less than 0 |
|
* (some error occurs), we should adjust inititial |
|
* capacity to the capacity corresponding to current OCV |
|
* value. |
|
*/ |
|
cur_cap = power_supply_ocv2cap_simple(data->cap_table, |
|
data->table_len, |
|
ocv); |
|
sc27xx_fgu_adjust_cap(data, cur_cap); |
|
} |
|
|
|
if (!int_mode) |
|
return; |
|
|
|
/* |
|
* After adjusting the battery capacity, we should set the |
|
* lowest alarm voltage instead. |
|
*/ |
|
data->min_volt = data->cap_table[data->table_len - 1].ocv; |
|
data->alarm_cap = power_supply_ocv2cap_simple(data->cap_table, |
|
data->table_len, |
|
data->min_volt); |
|
|
|
adc = sc27xx_fgu_voltage_to_adc(data, data->min_volt / 1000); |
|
regmap_update_bits(data->regmap, |
|
data->base + SC27XX_FGU_LOW_OVERLOAD, |
|
SC27XX_FGU_LOW_OVERLOAD_MASK, adc); |
|
} |
|
} |
|
|
|
static irqreturn_t sc27xx_fgu_interrupt(int irq, void *dev_id) |
|
{ |
|
struct sc27xx_fgu_data *data = dev_id; |
|
int ret, cap; |
|
u32 status; |
|
|
|
mutex_lock(&data->lock); |
|
|
|
ret = regmap_read(data->regmap, data->base + SC27XX_FGU_INT_STS, |
|
&status); |
|
if (ret) |
|
goto out; |
|
|
|
ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_CLR, |
|
status, status); |
|
if (ret) |
|
goto out; |
|
|
|
/* |
|
* When low overload voltage interrupt happens, we should calibrate the |
|
* battery capacity in lower voltage stage. |
|
*/ |
|
if (!(status & SC27XX_FGU_LOW_OVERLOAD_INT)) |
|
goto out; |
|
|
|
ret = sc27xx_fgu_get_capacity(data, &cap); |
|
if (ret) |
|
goto out; |
|
|
|
sc27xx_fgu_capacity_calibration(data, cap, true); |
|
|
|
out: |
|
mutex_unlock(&data->lock); |
|
|
|
power_supply_changed(data->battery); |
|
return IRQ_HANDLED; |
|
} |
|
|
|
static irqreturn_t sc27xx_fgu_bat_detection(int irq, void *dev_id) |
|
{ |
|
struct sc27xx_fgu_data *data = dev_id; |
|
int state; |
|
|
|
mutex_lock(&data->lock); |
|
|
|
state = gpiod_get_value_cansleep(data->gpiod); |
|
if (state < 0) { |
|
dev_err(data->dev, "failed to get gpio state\n"); |
|
mutex_unlock(&data->lock); |
|
return IRQ_RETVAL(state); |
|
} |
|
|
|
data->bat_present = !!state; |
|
|
|
mutex_unlock(&data->lock); |
|
|
|
power_supply_changed(data->battery); |
|
return IRQ_HANDLED; |
|
} |
|
|
|
static void sc27xx_fgu_disable(void *_data) |
|
{ |
|
struct sc27xx_fgu_data *data = _data; |
|
|
|
regmap_update_bits(data->regmap, SC27XX_CLK_EN0, SC27XX_FGU_RTC_EN, 0); |
|
regmap_update_bits(data->regmap, SC27XX_MODULE_EN0, SC27XX_FGU_EN, 0); |
|
} |
|
|
|
static int sc27xx_fgu_cap_to_clbcnt(struct sc27xx_fgu_data *data, int capacity) |
|
{ |
|
/* |
|
* Get current capacity (mAh) = battery total capacity (mAh) * |
|
* current capacity percent (capacity / 100). |
|
*/ |
|
int cur_cap = DIV_ROUND_CLOSEST(data->total_cap * capacity, 100); |
|
|
|
/* |
|
* Convert current capacity (mAh) to coulomb counter according to the |
|
* formula: 1 mAh =3.6 coulomb. |
|
*/ |
|
return DIV_ROUND_CLOSEST(cur_cap * 36 * data->cur_1000ma_adc * SC27XX_FGU_SAMPLE_HZ, 10); |
|
} |
|
|
|
static int sc27xx_fgu_calibration(struct sc27xx_fgu_data *data) |
|
{ |
|
struct nvmem_cell *cell; |
|
int calib_data, cal_4200mv; |
|
void *buf; |
|
size_t len; |
|
|
|
cell = nvmem_cell_get(data->dev, "fgu_calib"); |
|
if (IS_ERR(cell)) |
|
return PTR_ERR(cell); |
|
|
|
buf = nvmem_cell_read(cell, &len); |
|
nvmem_cell_put(cell); |
|
|
|
if (IS_ERR(buf)) |
|
return PTR_ERR(buf); |
|
|
|
memcpy(&calib_data, buf, min(len, sizeof(u32))); |
|
|
|
/* |
|
* Get the ADC value corresponding to 4200 mV from eFuse controller |
|
* according to below formula. Then convert to ADC values corresponding |
|
* to 1000 mV and 1000 mA. |
|
*/ |
|
cal_4200mv = (calib_data & 0x1ff) + 6963 - 4096 - 256; |
|
data->vol_1000mv_adc = DIV_ROUND_CLOSEST(cal_4200mv * 10, 42); |
|
data->cur_1000ma_adc = |
|
DIV_ROUND_CLOSEST(data->vol_1000mv_adc * 4 * data->calib_resist, |
|
SC27XX_FGU_IDEAL_RESISTANCE); |
|
|
|
kfree(buf); |
|
return 0; |
|
} |
|
|
|
static int sc27xx_fgu_hw_init(struct sc27xx_fgu_data *data) |
|
{ |
|
struct power_supply_battery_info info = { }; |
|
struct power_supply_battery_ocv_table *table; |
|
int ret, delta_clbcnt, alarm_adc; |
|
|
|
ret = power_supply_get_battery_info(data->battery, &info); |
|
if (ret) { |
|
dev_err(data->dev, "failed to get battery information\n"); |
|
return ret; |
|
} |
|
|
|
data->total_cap = info.charge_full_design_uah / 1000; |
|
data->max_volt = info.constant_charge_voltage_max_uv / 1000; |
|
data->internal_resist = info.factory_internal_resistance_uohm / 1000; |
|
data->min_volt = info.voltage_min_design_uv; |
|
|
|
/* |
|
* For SC27XX fuel gauge device, we only use one ocv-capacity |
|
* table in normal temperature 20 Celsius. |
|
*/ |
|
table = power_supply_find_ocv2cap_table(&info, 20, &data->table_len); |
|
if (!table) |
|
return -EINVAL; |
|
|
|
data->cap_table = devm_kmemdup(data->dev, table, |
|
data->table_len * sizeof(*table), |
|
GFP_KERNEL); |
|
if (!data->cap_table) { |
|
power_supply_put_battery_info(data->battery, &info); |
|
return -ENOMEM; |
|
} |
|
|
|
data->alarm_cap = power_supply_ocv2cap_simple(data->cap_table, |
|
data->table_len, |
|
data->min_volt); |
|
if (!data->alarm_cap) |
|
data->alarm_cap += 1; |
|
|
|
data->resist_table_len = info.resist_table_size; |
|
if (data->resist_table_len > 0) { |
|
data->resist_table = devm_kmemdup(data->dev, info.resist_table, |
|
data->resist_table_len * |
|
sizeof(struct power_supply_resistance_temp_table), |
|
GFP_KERNEL); |
|
if (!data->resist_table) { |
|
power_supply_put_battery_info(data->battery, &info); |
|
return -ENOMEM; |
|
} |
|
} |
|
|
|
power_supply_put_battery_info(data->battery, &info); |
|
|
|
ret = sc27xx_fgu_calibration(data); |
|
if (ret) |
|
return ret; |
|
|
|
/* Enable the FGU module */ |
|
ret = regmap_update_bits(data->regmap, SC27XX_MODULE_EN0, |
|
SC27XX_FGU_EN, SC27XX_FGU_EN); |
|
if (ret) { |
|
dev_err(data->dev, "failed to enable fgu\n"); |
|
return ret; |
|
} |
|
|
|
/* Enable the FGU RTC clock to make it work */ |
|
ret = regmap_update_bits(data->regmap, SC27XX_CLK_EN0, |
|
SC27XX_FGU_RTC_EN, SC27XX_FGU_RTC_EN); |
|
if (ret) { |
|
dev_err(data->dev, "failed to enable fgu RTC clock\n"); |
|
goto disable_fgu; |
|
} |
|
|
|
ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_CLR, |
|
SC27XX_FGU_INT_MASK, SC27XX_FGU_INT_MASK); |
|
if (ret) { |
|
dev_err(data->dev, "failed to clear interrupt status\n"); |
|
goto disable_clk; |
|
} |
|
|
|
/* |
|
* Set the voltage low overload threshold, which means when the battery |
|
* voltage is lower than this threshold, the controller will generate |
|
* one interrupt to notify. |
|
*/ |
|
alarm_adc = sc27xx_fgu_voltage_to_adc(data, data->min_volt / 1000); |
|
ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_LOW_OVERLOAD, |
|
SC27XX_FGU_LOW_OVERLOAD_MASK, alarm_adc); |
|
if (ret) { |
|
dev_err(data->dev, "failed to set fgu low overload\n"); |
|
goto disable_clk; |
|
} |
|
|
|
/* |
|
* Set the coulomb counter delta threshold, that means when the coulomb |
|
* counter change is multiples of the delta threshold, the controller |
|
* will generate one interrupt to notify the users to update the battery |
|
* capacity. Now we set the delta threshold as a counter value of 1% |
|
* capacity. |
|
*/ |
|
delta_clbcnt = sc27xx_fgu_cap_to_clbcnt(data, 1); |
|
|
|
ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_CLBCNT_DELTL, |
|
SC27XX_FGU_CLBCNT_MASK, delta_clbcnt); |
|
if (ret) { |
|
dev_err(data->dev, "failed to set low delta coulomb counter\n"); |
|
goto disable_clk; |
|
} |
|
|
|
ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_CLBCNT_DELTH, |
|
SC27XX_FGU_CLBCNT_MASK, |
|
delta_clbcnt >> SC27XX_FGU_CLBCNT_SHIFT); |
|
if (ret) { |
|
dev_err(data->dev, "failed to set high delta coulomb counter\n"); |
|
goto disable_clk; |
|
} |
|
|
|
/* |
|
* Get the boot battery capacity when system powers on, which is used to |
|
* initialize the coulomb counter. After that, we can read the coulomb |
|
* counter to measure the battery capacity. |
|
*/ |
|
ret = sc27xx_fgu_get_boot_capacity(data, &data->init_cap); |
|
if (ret) { |
|
dev_err(data->dev, "failed to get boot capacity\n"); |
|
goto disable_clk; |
|
} |
|
|
|
/* |
|
* Convert battery capacity to the corresponding initial coulomb counter |
|
* and set into coulomb counter registers. |
|
*/ |
|
data->init_clbcnt = sc27xx_fgu_cap_to_clbcnt(data, data->init_cap); |
|
ret = sc27xx_fgu_set_clbcnt(data, data->init_clbcnt); |
|
if (ret) { |
|
dev_err(data->dev, "failed to initialize coulomb counter\n"); |
|
goto disable_clk; |
|
} |
|
|
|
return 0; |
|
|
|
disable_clk: |
|
regmap_update_bits(data->regmap, SC27XX_CLK_EN0, SC27XX_FGU_RTC_EN, 0); |
|
disable_fgu: |
|
regmap_update_bits(data->regmap, SC27XX_MODULE_EN0, SC27XX_FGU_EN, 0); |
|
|
|
return ret; |
|
} |
|
|
|
static int sc27xx_fgu_probe(struct platform_device *pdev) |
|
{ |
|
struct device *dev = &pdev->dev; |
|
struct device_node *np = dev->of_node; |
|
struct power_supply_config fgu_cfg = { }; |
|
struct sc27xx_fgu_data *data; |
|
int ret, irq; |
|
|
|
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
|
if (!data) |
|
return -ENOMEM; |
|
|
|
data->regmap = dev_get_regmap(dev->parent, NULL); |
|
if (!data->regmap) { |
|
dev_err(dev, "failed to get regmap\n"); |
|
return -ENODEV; |
|
} |
|
|
|
ret = device_property_read_u32(dev, "reg", &data->base); |
|
if (ret) { |
|
dev_err(dev, "failed to get fgu address\n"); |
|
return ret; |
|
} |
|
|
|
ret = device_property_read_u32(&pdev->dev, |
|
"sprd,calib-resistance-micro-ohms", |
|
&data->calib_resist); |
|
if (ret) { |
|
dev_err(&pdev->dev, |
|
"failed to get fgu calibration resistance\n"); |
|
return ret; |
|
} |
|
|
|
data->channel = devm_iio_channel_get(dev, "bat-temp"); |
|
if (IS_ERR(data->channel)) { |
|
dev_err(dev, "failed to get IIO channel\n"); |
|
return PTR_ERR(data->channel); |
|
} |
|
|
|
data->charge_chan = devm_iio_channel_get(dev, "charge-vol"); |
|
if (IS_ERR(data->charge_chan)) { |
|
dev_err(dev, "failed to get charge IIO channel\n"); |
|
return PTR_ERR(data->charge_chan); |
|
} |
|
|
|
data->gpiod = devm_gpiod_get(dev, "bat-detect", GPIOD_IN); |
|
if (IS_ERR(data->gpiod)) { |
|
dev_err(dev, "failed to get battery detection GPIO\n"); |
|
return PTR_ERR(data->gpiod); |
|
} |
|
|
|
ret = gpiod_get_value_cansleep(data->gpiod); |
|
if (ret < 0) { |
|
dev_err(dev, "failed to get gpio state\n"); |
|
return ret; |
|
} |
|
|
|
data->bat_present = !!ret; |
|
mutex_init(&data->lock); |
|
data->dev = dev; |
|
platform_set_drvdata(pdev, data); |
|
|
|
fgu_cfg.drv_data = data; |
|
fgu_cfg.of_node = np; |
|
data->battery = devm_power_supply_register(dev, &sc27xx_fgu_desc, |
|
&fgu_cfg); |
|
if (IS_ERR(data->battery)) { |
|
dev_err(dev, "failed to register power supply\n"); |
|
return PTR_ERR(data->battery); |
|
} |
|
|
|
ret = sc27xx_fgu_hw_init(data); |
|
if (ret) { |
|
dev_err(dev, "failed to initialize fgu hardware\n"); |
|
return ret; |
|
} |
|
|
|
ret = devm_add_action_or_reset(dev, sc27xx_fgu_disable, data); |
|
if (ret) { |
|
dev_err(dev, "failed to add fgu disable action\n"); |
|
return ret; |
|
} |
|
|
|
irq = platform_get_irq(pdev, 0); |
|
if (irq < 0) { |
|
dev_err(dev, "no irq resource specified\n"); |
|
return irq; |
|
} |
|
|
|
ret = devm_request_threaded_irq(data->dev, irq, NULL, |
|
sc27xx_fgu_interrupt, |
|
IRQF_NO_SUSPEND | IRQF_ONESHOT, |
|
pdev->name, data); |
|
if (ret) { |
|
dev_err(data->dev, "failed to request fgu IRQ\n"); |
|
return ret; |
|
} |
|
|
|
irq = gpiod_to_irq(data->gpiod); |
|
if (irq < 0) { |
|
dev_err(dev, "failed to translate GPIO to IRQ\n"); |
|
return irq; |
|
} |
|
|
|
ret = devm_request_threaded_irq(dev, irq, NULL, |
|
sc27xx_fgu_bat_detection, |
|
IRQF_ONESHOT | IRQF_TRIGGER_RISING | |
|
IRQF_TRIGGER_FALLING, |
|
pdev->name, data); |
|
if (ret) { |
|
dev_err(dev, "failed to request IRQ\n"); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_PM_SLEEP |
|
static int sc27xx_fgu_resume(struct device *dev) |
|
{ |
|
struct sc27xx_fgu_data *data = dev_get_drvdata(dev); |
|
int ret; |
|
|
|
ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_EN, |
|
SC27XX_FGU_LOW_OVERLOAD_INT | |
|
SC27XX_FGU_CLBCNT_DELTA_INT, 0); |
|
if (ret) { |
|
dev_err(data->dev, "failed to disable fgu interrupts\n"); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int sc27xx_fgu_suspend(struct device *dev) |
|
{ |
|
struct sc27xx_fgu_data *data = dev_get_drvdata(dev); |
|
int ret, status, ocv; |
|
|
|
ret = sc27xx_fgu_get_status(data, &status); |
|
if (ret) |
|
return ret; |
|
|
|
/* |
|
* If we are charging, then no need to enable the FGU interrupts to |
|
* adjust the battery capacity. |
|
*/ |
|
if (status != POWER_SUPPLY_STATUS_NOT_CHARGING && |
|
status != POWER_SUPPLY_STATUS_DISCHARGING) |
|
return 0; |
|
|
|
ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_EN, |
|
SC27XX_FGU_LOW_OVERLOAD_INT, |
|
SC27XX_FGU_LOW_OVERLOAD_INT); |
|
if (ret) { |
|
dev_err(data->dev, "failed to enable low voltage interrupt\n"); |
|
return ret; |
|
} |
|
|
|
ret = sc27xx_fgu_get_vbat_ocv(data, &ocv); |
|
if (ret) |
|
goto disable_int; |
|
|
|
/* |
|
* If current OCV is less than the minimum voltage, we should enable the |
|
* coulomb counter threshold interrupt to notify events to adjust the |
|
* battery capacity. |
|
*/ |
|
if (ocv < data->min_volt) { |
|
ret = regmap_update_bits(data->regmap, |
|
data->base + SC27XX_FGU_INT_EN, |
|
SC27XX_FGU_CLBCNT_DELTA_INT, |
|
SC27XX_FGU_CLBCNT_DELTA_INT); |
|
if (ret) { |
|
dev_err(data->dev, |
|
"failed to enable coulomb threshold int\n"); |
|
goto disable_int; |
|
} |
|
} |
|
|
|
return 0; |
|
|
|
disable_int: |
|
regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_EN, |
|
SC27XX_FGU_LOW_OVERLOAD_INT, 0); |
|
return ret; |
|
} |
|
#endif |
|
|
|
static const struct dev_pm_ops sc27xx_fgu_pm_ops = { |
|
SET_SYSTEM_SLEEP_PM_OPS(sc27xx_fgu_suspend, sc27xx_fgu_resume) |
|
}; |
|
|
|
static const struct of_device_id sc27xx_fgu_of_match[] = { |
|
{ .compatible = "sprd,sc2731-fgu", }, |
|
{ } |
|
}; |
|
|
|
static struct platform_driver sc27xx_fgu_driver = { |
|
.probe = sc27xx_fgu_probe, |
|
.driver = { |
|
.name = "sc27xx-fgu", |
|
.of_match_table = sc27xx_fgu_of_match, |
|
.pm = &sc27xx_fgu_pm_ops, |
|
} |
|
}; |
|
|
|
module_platform_driver(sc27xx_fgu_driver); |
|
|
|
MODULE_DESCRIPTION("Spreadtrum SC27XX PMICs Fual Gauge Unit Driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|