// SPDX-License-Identifier: GPL-2.0 // Copyright (C) 2018 Spreadtrum Communications Inc. #include <linux/gpio/consumer.h> #include <linux/iio/consumer.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/math64.h> #include <linux/module.h> #include <linux/nvmem-consumer.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/power_supply.h> #include <linux/regmap.h> #include <linux/slab.h> /* PMIC global control registers definition */ #define SC27XX_MODULE_EN0 … #define SC27XX_CLK_EN0 … #define SC27XX_FGU_EN … #define SC27XX_FGU_RTC_EN … /* FGU registers definition */ #define SC27XX_FGU_START … #define SC27XX_FGU_CONFIG … #define SC27XX_FGU_ADC_CONFIG … #define SC27XX_FGU_STATUS … #define SC27XX_FGU_INT_EN … #define SC27XX_FGU_INT_CLR … #define SC27XX_FGU_INT_STS … #define SC27XX_FGU_VOLTAGE … #define SC27XX_FGU_OCV … #define SC27XX_FGU_POCV … #define SC27XX_FGU_CURRENT … #define SC27XX_FGU_LOW_OVERLOAD … #define SC27XX_FGU_CLBCNT_SETH … #define SC27XX_FGU_CLBCNT_SETL … #define SC27XX_FGU_CLBCNT_DELTH … #define SC27XX_FGU_CLBCNT_DELTL … #define SC27XX_FGU_CLBCNT_VALH … #define SC27XX_FGU_CLBCNT_VALL … #define SC27XX_FGU_CLBCNT_QMAXL … #define SC27XX_FGU_USER_AREA_SET … #define SC27XX_FGU_USER_AREA_CLEAR … #define SC27XX_FGU_USER_AREA_STATUS … #define SC27XX_FGU_VOLTAGE_BUF … #define SC27XX_FGU_CURRENT_BUF … #define SC27XX_WRITE_SELCLB_EN … #define SC27XX_FGU_CLBCNT_MASK … #define SC27XX_FGU_CLBCNT_SHIFT … #define SC27XX_FGU_LOW_OVERLOAD_MASK … #define SC27XX_FGU_INT_MASK … #define SC27XX_FGU_LOW_OVERLOAD_INT … #define SC27XX_FGU_CLBCNT_DELTA_INT … #define SC27XX_FGU_MODE_AREA_MASK … #define SC27XX_FGU_CAP_AREA_MASK … #define SC27XX_FGU_MODE_AREA_SHIFT … #define SC27XX_FGU_FIRST_POWERTON … #define SC27XX_FGU_DEFAULT_CAP … #define SC27XX_FGU_NORMAIL_POWERTON … #define SC27XX_FGU_CUR_BASIC_ADC … #define SC27XX_FGU_SAMPLE_HZ … /* micro Ohms */ #define SC27XX_FGU_IDEAL_RESISTANCE … /* * struct sc27xx_fgu_data: describe the FGU device * @regmap: regmap for register access * @dev: platform device * @battery: battery power supply * @base: the base offset for the controller * @lock: protect the structure * @gpiod: GPIO for battery detection * @channel: IIO channel to get battery temperature * @charge_chan: IIO channel to get charge voltage * @internal_resist: the battery internal resistance in mOhm * @total_cap: the total capacity of the battery in mAh * @init_cap: the initial capacity of the battery in mAh * @alarm_cap: the alarm capacity * @init_clbcnt: the initial coulomb counter * @max_volt: the maximum constant input voltage in millivolt * @min_volt: the minimum drained battery voltage in microvolt * @boot_volt: the voltage measured during boot in microvolt * @table_len: the capacity table length * @resist_table_len: the resistance table length * @cur_1000ma_adc: ADC value corresponding to 1000 mA * @vol_1000mv_adc: ADC value corresponding to 1000 mV * @calib_resist: the real resistance of coulomb counter chip in uOhm * @cap_table: capacity table with corresponding ocv * @resist_table: resistance percent table with corresponding temperature */ struct sc27xx_fgu_data { … }; static int sc27xx_fgu_cap_to_clbcnt(struct sc27xx_fgu_data *data, int capacity); static void sc27xx_fgu_capacity_calibration(struct sc27xx_fgu_data *data, int cap, bool int_mode); static void sc27xx_fgu_adjust_cap(struct sc27xx_fgu_data *data, int cap); static int sc27xx_fgu_get_temp(struct sc27xx_fgu_data *data, int *temp); static const char * const sc27xx_charger_supply_name[] = …; static int sc27xx_fgu_adc_to_current(struct sc27xx_fgu_data *data, s64 adc) { … } static int sc27xx_fgu_adc_to_voltage(struct sc27xx_fgu_data *data, s64 adc) { … } static int sc27xx_fgu_voltage_to_adc(struct sc27xx_fgu_data *data, int vol) { … } static bool sc27xx_fgu_is_first_poweron(struct sc27xx_fgu_data *data) { … } static int sc27xx_fgu_save_boot_mode(struct sc27xx_fgu_data *data, int boot_mode) { … } static int sc27xx_fgu_save_last_cap(struct sc27xx_fgu_data *data, int cap) { … } static int sc27xx_fgu_read_last_cap(struct sc27xx_fgu_data *data, int *cap) { … } /* * When system boots on, we can not read battery capacity from coulomb * registers, since now the coulomb registers are invalid. So we should * calculate the battery open circuit voltage, and get current battery * capacity according to the capacity table. */ static int sc27xx_fgu_get_boot_capacity(struct sc27xx_fgu_data *data, int *cap) { … } static int sc27xx_fgu_set_clbcnt(struct sc27xx_fgu_data *data, int clbcnt) { … } static int sc27xx_fgu_get_clbcnt(struct sc27xx_fgu_data *data, int *clb_cnt) { … } static int sc27xx_fgu_get_vol_now(struct sc27xx_fgu_data *data, int *val) { … } static int sc27xx_fgu_get_cur_now(struct sc27xx_fgu_data *data, int *val) { … } static int sc27xx_fgu_get_capacity(struct sc27xx_fgu_data *data, int *cap) { … } static int sc27xx_fgu_get_vbat_vol(struct sc27xx_fgu_data *data, int *val) { … } static int sc27xx_fgu_get_current(struct sc27xx_fgu_data *data, int *val) { … } static int sc27xx_fgu_get_vbat_ocv(struct sc27xx_fgu_data *data, int *val) { … } static int sc27xx_fgu_get_charge_vol(struct sc27xx_fgu_data *data, int *val) { … } static int sc27xx_fgu_get_temp(struct sc27xx_fgu_data *data, int *temp) { … } static int sc27xx_fgu_get_health(struct sc27xx_fgu_data *data, int *health) { … } static int sc27xx_fgu_get_status(struct sc27xx_fgu_data *data, int *status) { … } static int sc27xx_fgu_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { … } static int sc27xx_fgu_set_property(struct power_supply *psy, enum power_supply_property psp, const union power_supply_propval *val) { … } static int sc27xx_fgu_property_is_writeable(struct power_supply *psy, enum power_supply_property psp) { … } static enum power_supply_property sc27xx_fgu_props[] = …; static const struct power_supply_desc sc27xx_fgu_desc = …; static void sc27xx_fgu_adjust_cap(struct sc27xx_fgu_data *data, int cap) { … } static void sc27xx_fgu_capacity_calibration(struct sc27xx_fgu_data *data, int cap, bool int_mode) { … } static irqreturn_t sc27xx_fgu_interrupt(int irq, void *dev_id) { … } static irqreturn_t sc27xx_fgu_bat_detection(int irq, void *dev_id) { … } static void sc27xx_fgu_disable(void *_data) { … } static int sc27xx_fgu_cap_to_clbcnt(struct sc27xx_fgu_data *data, int capacity) { … } static int sc27xx_fgu_calibration(struct sc27xx_fgu_data *data) { … } static int sc27xx_fgu_hw_init(struct sc27xx_fgu_data *data) { … } static int sc27xx_fgu_probe(struct platform_device *pdev) { … } #ifdef CONFIG_PM_SLEEP static int sc27xx_fgu_resume(struct device *dev) { … } static int sc27xx_fgu_suspend(struct device *dev) { … } #endif static const struct dev_pm_ops sc27xx_fgu_pm_ops = …; static const struct of_device_id sc27xx_fgu_of_match[] = …; MODULE_DEVICE_TABLE(of, sc27xx_fgu_of_match); static struct platform_driver sc27xx_fgu_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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