// SPDX-License-Identifier: GPL-2.0-only /* * Battery driver for Marvell 88PM860x PMIC * * Copyright (c) 2012 Marvell International Ltd. * Author: Jett Zhou <[email protected]> * Haojian Zhuang <[email protected]> */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/mutex.h> #include <linux/string.h> #include <linux/power_supply.h> #include <linux/mfd/88pm860x.h> #include <linux/delay.h> /* bit definitions of Status Query Interface 2 */ #define STATUS2_CHG … #define STATUS2_BAT … #define STATUS2_VBUS … /* bit definitions of Measurement Enable 1 Register */ #define MEAS1_TINT … #define MEAS1_GP1 … /* bit definitions of Measurement Enable 3 Register */ #define MEAS3_IBAT … #define MEAS3_BAT_DET … #define MEAS3_CC … /* bit definitions of Measurement Off Time Register */ #define MEAS_OFF_SLEEP_EN … /* bit definitions of GPADC Bias Current 2 Register */ #define GPBIAS2_GPADC1_SET … /* GPADC1 Bias Current value in uA unit */ #define GPBIAS2_GPADC1_UA … /* bit definitions of GPADC Misc 1 Register */ #define GPMISC1_GPADC_EN … /* bit definitions of Charger Control 6 Register */ #define CC6_BAT_DET_GPADC1 … /* bit definitions of Coulomb Counter Reading Register */ #define CCNT_AVG_SEL … /* bit definitions of RTC miscellaneous Register1 */ #define RTC_SOC_5LSB … /* bit definitions of RTC Register1 */ #define RTC_SOC_3MSB … /* bit definitions of Power up Log register */ #define BAT_WU_LOG … /* coulomb counter index */ #define CCNT_POS1 … #define CCNT_POS2 … #define CCNT_NEG1 … #define CCNT_NEG2 … #define CCNT_SPOS … #define CCNT_SNEG … /* OCV -- Open Circuit Voltage */ #define OCV_MODE_ACTIVE … #define OCV_MODE_SLEEP … /* Vbat range of CC for measuring Rbat */ #define LOW_BAT_THRESHOLD … #define VBATT_RESISTOR_MIN … #define VBATT_RESISTOR_MAX … /* TBAT for batt, TINT for chip itself */ #define PM860X_TEMP_TINT … #define PM860X_TEMP_TBAT … /* * Battery temperature based on NTC resistor, defined * corresponding resistor value -- Ohm / C degeree. */ #define TBAT_NEG_25D … #define TBAT_NEG_10D … #define TBAT_0D … #define TBAT_10D … #define TBAT_20D … #define TBAT_30D … #define TBAT_40D … struct pm860x_battery_info { … }; struct ccnt { … }; /* * State of Charge. * The first number is mAh(=3.6C), and the second number is percent point. */ static int array_soc[][2] = …; static struct ccnt ccnt_data; /* * register 1 bit[7:0] -- bit[11:4] of measured value of voltage * register 0 bit[3:0] -- bit[3:0] of measured value of voltage */ static int measure_12bit_voltage(struct pm860x_battery_info *info, int offset, int *data) { … } static int measure_vbatt(struct pm860x_battery_info *info, int state, int *data) { … } /* * Return value is signed data. * Negative value means discharging, and positive value means charging. */ static int measure_current(struct pm860x_battery_info *info, int *data) { … } static int set_charger_current(struct pm860x_battery_info *info, int data, int *old) { … } static int read_ccnt(struct pm860x_battery_info *info, int offset, int *ccnt) { … } static int calc_ccnt(struct pm860x_battery_info *info, struct ccnt *ccnt) { … } static int clear_ccnt(struct pm860x_battery_info *info, struct ccnt *ccnt) { … } /* Calculate Open Circuit Voltage */ static int calc_ocv(struct pm860x_battery_info *info, int *ocv) { … } /* Calculate State of Charge (percent points) */ static int calc_soc(struct pm860x_battery_info *info, int state, int *soc) { … } static irqreturn_t pm860x_coulomb_handler(int irq, void *data) { … } static irqreturn_t pm860x_batt_handler(int irq, void *data) { … } static void pm860x_init_battery(struct pm860x_battery_info *info) { … } static void set_temp_threshold(struct pm860x_battery_info *info, int min, int max) { … } static int measure_temp(struct pm860x_battery_info *info, int *data) { … } static int calc_resistor(struct pm860x_battery_info *info) { … } static int calc_capacity(struct pm860x_battery_info *info, int *cap) { … } static void pm860x_external_power_changed(struct power_supply *psy) { … } static int pm860x_batt_get_prop(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { … } static int pm860x_batt_set_prop(struct power_supply *psy, enum power_supply_property psp, const union power_supply_propval *val) { … } static enum power_supply_property pm860x_batt_props[] = …; static const struct power_supply_desc pm860x_battery_desc = …; static int pm860x_battery_probe(struct platform_device *pdev) { … } #ifdef CONFIG_PM_SLEEP static int pm860x_battery_suspend(struct device *dev) { … } static int pm860x_battery_resume(struct device *dev) { … } #endif static SIMPLE_DEV_PM_OPS(pm860x_battery_pm_ops, pm860x_battery_suspend, pm860x_battery_resume); static struct platform_driver pm860x_battery_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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