// SPDX-License-Identifier: GPL-2.0+ /* * max77976_charger.c - Driver for the Maxim MAX77976 battery charger * * Copyright (C) 2021 Luca Ceresoli * Author: Luca Ceresoli <[email protected]> */ #include <linux/i2c.h> #include <linux/module.h> #include <linux/power_supply.h> #include <linux/regmap.h> #define MAX77976_DRIVER_NAME … #define MAX77976_CHIP_ID … static const char *max77976_manufacturer = …; static const char *max77976_model = …; /* -------------------------------------------------------------------------- * Register map */ #define MAX77976_REG_CHIP_ID … #define MAX77976_REG_CHIP_REVISION … #define MAX77976_REG_CHG_INT_OK … #define MAX77976_REG_CHG_DETAILS_01 … #define MAX77976_REG_CHG_CNFG_00 … #define MAX77976_REG_CHG_CNFG_02 … #define MAX77976_REG_CHG_CNFG_06 … #define MAX77976_REG_CHG_CNFG_09 … /* CHG_DETAILS_01.CHG_DTLS values */ enum max77976_charging_state { … }; /* CHG_DETAILS_01.BAT_DTLS values */ enum max77976_battery_state { … }; /* CHG_CNFG_00.MODE values */ enum max77976_mode { … }; /* CHG_CNFG_02.CHG_CC: charge current limit, 100..5500 mA, 50 mA steps */ #define MAX77976_CHG_CC_STEP … #define MAX77976_CHG_CC_MIN … #define MAX77976_CHG_CC_MAX … /* CHG_CNFG_09.CHGIN_ILIM: input current limit, 100..3200 mA, 100 mA steps */ #define MAX77976_CHGIN_ILIM_STEP … #define MAX77976_CHGIN_ILIM_MIN … #define MAX77976_CHGIN_ILIM_MAX … enum max77976_field_idx { … }; static const struct reg_field max77976_reg_field[MAX77976_N_REGMAP_FIELDS] = …; static const struct regmap_config max77976_regmap_config = …; /* -------------------------------------------------------------------------- * Data structures */ struct max77976 { … }; /* -------------------------------------------------------------------------- * power_supply properties */ static int max77976_get_status(struct max77976 *chg, int *val) { … } static int max77976_get_charge_type(struct max77976 *chg, int *val) { … } static int max77976_get_health(struct max77976 *chg, int *val) { … } static int max77976_get_online(struct max77976 *chg, int *val) { … } static int max77976_get_integer(struct max77976 *chg, enum max77976_field_idx fidx, unsigned int clamp_min, unsigned int clamp_max, unsigned int mult, int *val) { … } static int max77976_set_integer(struct max77976 *chg, enum max77976_field_idx fidx, unsigned int clamp_min, unsigned int clamp_max, unsigned int div, int val) { … } static int max77976_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { … } static int max77976_set_property(struct power_supply *psy, enum power_supply_property psp, const union power_supply_propval *val) { struct max77976 *chg = power_supply_get_drvdata(psy); int err = 0; switch (psp) { case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: err = max77976_set_integer(chg, CHG_CC, MAX77976_CHG_CC_MIN, MAX77976_CHG_CC_MAX, MAX77976_CHG_CC_STEP, val->intval); break; case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: err = max77976_set_integer(chg, CHGIN_ILIM, MAX77976_CHGIN_ILIM_MIN, MAX77976_CHGIN_ILIM_MAX, MAX77976_CHGIN_ILIM_STEP, val->intval); break; default: err = -EINVAL; } return err; }; static int max77976_property_is_writeable(struct power_supply *psy, enum power_supply_property psp) { … } static enum power_supply_property max77976_psy_props[] = …; static const struct power_supply_desc max77976_psy_desc = …; /* -------------------------------------------------------------------------- * Entry point */ static int max77976_detect(struct max77976 *chg) { … } static int max77976_configure(struct max77976 *chg) { … } static int max77976_probe(struct i2c_client *client) { … } static const struct i2c_device_id max77976_i2c_id[] = …; MODULE_DEVICE_TABLE(i2c, max77976_i2c_id); static const struct of_device_id max77976_of_id[] = …; MODULE_DEVICE_TABLE(of, max77976_of_id); static struct i2c_driver max77976_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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