diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index c78be9f322e6..ea11797670ca 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -766,6 +766,14 @@ config BATTERY_RT5033 The fuelgauge calculates and determines the battery state of charge according to battery open circuit voltage. +config CHARGER_RT5033 + tristate "RT5033 battery charger support" + depends on MFD_RT5033 + help + This adds support for battery charger in Richtek RT5033 PMIC. + The device supports pre-charge mode, fast charge mode and + constant voltage mode. + config CHARGER_RT9455 tristate "Richtek RT9455 battery charger driver" depends on I2C diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index 4adbfba02d05..dfc624bbcf1d 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -54,6 +54,7 @@ obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o obj-$(CONFIG_BATTERY_MAX17042) += max17042_battery.o obj-$(CONFIG_BATTERY_MAX1721X) += max1721x_battery.o obj-$(CONFIG_BATTERY_RT5033) += rt5033_battery.o +obj-$(CONFIG_CHARGER_RT5033) += rt5033_charger.o obj-$(CONFIG_CHARGER_RT9455) += rt9455_charger.o obj-$(CONFIG_CHARGER_RT9467) += rt9467-charger.o obj-$(CONFIG_CHARGER_RT9471) += rt9471.o diff --git a/drivers/power/supply/rt5033_charger.c b/drivers/power/supply/rt5033_charger.c new file mode 100644 index 000000000000..5218dfbf5e1b --- /dev/null +++ b/drivers/power/supply/rt5033_charger.c @@ -0,0 +1,472 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Battery charger driver for RT5033 + * + * Copyright (C) 2014 Samsung Electronics, Co., Ltd. + * Author: Beomho Seo + */ + +#include +#include +#include +#include +#include +#include + +struct rt5033_charger_data { + unsigned int pre_uamp; + unsigned int pre_uvolt; + unsigned int const_uvolt; + unsigned int eoc_uamp; + unsigned int fast_uamp; +}; + +struct rt5033_charger { + struct device *dev; + struct regmap *regmap; + struct power_supply *psy; + struct rt5033_charger_data *chg; +}; + +static int rt5033_get_charger_state(struct rt5033_charger *charger) +{ + struct regmap *regmap = charger->regmap; + unsigned int reg_data; + int state; + + if (!regmap) + return POWER_SUPPLY_STATUS_UNKNOWN; + + regmap_read(regmap, RT5033_REG_CHG_STAT, ®_data); + + switch (reg_data & RT5033_CHG_STAT_MASK) { + case RT5033_CHG_STAT_DISCHARGING: + state = POWER_SUPPLY_STATUS_DISCHARGING; + break; + case RT5033_CHG_STAT_CHARGING: + state = POWER_SUPPLY_STATUS_CHARGING; + break; + case RT5033_CHG_STAT_FULL: + state = POWER_SUPPLY_STATUS_FULL; + break; + case RT5033_CHG_STAT_NOT_CHARGING: + state = POWER_SUPPLY_STATUS_NOT_CHARGING; + break; + default: + state = POWER_SUPPLY_STATUS_UNKNOWN; + } + + return state; +} + +static int rt5033_get_charger_type(struct rt5033_charger *charger) +{ + struct regmap *regmap = charger->regmap; + unsigned int reg_data; + int state; + + regmap_read(regmap, RT5033_REG_CHG_STAT, ®_data); + + switch (reg_data & RT5033_CHG_STAT_TYPE_MASK) { + case RT5033_CHG_STAT_TYPE_FAST: + state = POWER_SUPPLY_CHARGE_TYPE_FAST; + break; + case RT5033_CHG_STAT_TYPE_PRE: + state = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; + break; + default: + state = POWER_SUPPLY_CHARGE_TYPE_NONE; + } + + return state; +} + +static int rt5033_get_charger_current_limit(struct rt5033_charger *charger) +{ + struct regmap *regmap = charger->regmap; + unsigned int state, reg_data, data; + + regmap_read(regmap, RT5033_REG_CHG_CTRL5, ®_data); + + state = (reg_data & RT5033_CHGCTRL5_ICHG_MASK) + >> RT5033_CHGCTRL5_ICHG_SHIFT; + + data = RT5033_CHARGER_FAST_CURRENT_MIN + + RT5033_CHARGER_FAST_CURRENT_STEP_NUM * state; + + return data; +} + +static int rt5033_get_charger_const_voltage(struct rt5033_charger *charger) +{ + struct regmap *regmap = charger->regmap; + unsigned int state, reg_data, data; + + regmap_read(regmap, RT5033_REG_CHG_CTRL2, ®_data); + + state = (reg_data & RT5033_CHGCTRL2_CV_MASK) + >> RT5033_CHGCTRL2_CV_SHIFT; + + data = RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MIN + + RT5033_CHARGER_CONST_VOLTAGE_STEP_NUM * state; + + return data; +} + +static inline int rt5033_init_const_charge(struct rt5033_charger *charger) +{ + struct rt5033_charger_data *chg = charger->chg; + int ret; + unsigned int val; + u8 reg_data; + + /* Set constant voltage mode */ + if (chg->const_uvolt < RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MIN || + chg->const_uvolt > RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MAX) { + dev_err(charger->dev, + "Value 'constant-charge-voltage-max-microvolt' out of range\n"); + return -EINVAL; + } + + if (chg->const_uvolt == RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MIN) + reg_data = 0x00; + else if (chg->const_uvolt == RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MAX) + reg_data = RT5033_CV_MAX_VOLTAGE; + else { + val = chg->const_uvolt; + val -= RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MIN; + val /= RT5033_CHARGER_CONST_VOLTAGE_STEP_NUM; + reg_data = val; + } + + ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL2, + RT5033_CHGCTRL2_CV_MASK, + reg_data << RT5033_CHGCTRL2_CV_SHIFT); + if (ret) { + dev_err(charger->dev, "Failed regmap update\n"); + return -EINVAL; + } + + /* Set end of charge current */ + if (chg->eoc_uamp < RT5033_CHARGER_EOC_MIN || + chg->eoc_uamp > RT5033_CHARGER_EOC_MAX) { + dev_err(charger->dev, + "Value 'charge-term-current-microamp' out of range\n"); + return -EINVAL; + } + + if (chg->eoc_uamp == RT5033_CHARGER_EOC_MIN) + reg_data = 0x01; + else if (chg->eoc_uamp == RT5033_CHARGER_EOC_MAX) + reg_data = 0x07; + else { + val = chg->eoc_uamp; + if (val < RT5033_CHARGER_EOC_REF) { + val -= RT5033_CHARGER_EOC_MIN; + val /= RT5033_CHARGER_EOC_STEP_NUM1; + reg_data = 0x01 + val; + } else if (val > RT5033_CHARGER_EOC_REF) { + val -= RT5033_CHARGER_EOC_REF; + val /= RT5033_CHARGER_EOC_STEP_NUM2; + reg_data = 0x04 + val; + } else { + reg_data = 0x04; + } + } + + ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL4, + RT5033_CHGCTRL4_EOC_MASK, reg_data); + if (ret) { + dev_err(charger->dev, "Failed regmap update\n"); + return -EINVAL; + } + + return 0; +} + +static inline int rt5033_init_fast_charge(struct rt5033_charger *charger) +{ + struct rt5033_charger_data *chg = charger->chg; + int ret; + unsigned int val; + u8 reg_data; + + /* Set limit input current */ + ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL1, + RT5033_CHGCTRL1_IAICR_MASK, RT5033_AICR_2000_MODE); + if (ret) { + dev_err(charger->dev, "Failed regmap update\n"); + return -EINVAL; + } + + /* Set fast-charge mode charging current */ + if (chg->fast_uamp < RT5033_CHARGER_FAST_CURRENT_MIN || + chg->fast_uamp > RT5033_CHARGER_FAST_CURRENT_MAX) { + dev_err(charger->dev, + "Value 'constant-charge-current-max-microamp' out of range\n"); + return -EINVAL; + } + + if (chg->fast_uamp == RT5033_CHARGER_FAST_CURRENT_MIN) + reg_data = 0x00; + else if (chg->fast_uamp == RT5033_CHARGER_FAST_CURRENT_MAX) + reg_data = RT5033_CHG_MAX_CURRENT; + else { + val = chg->fast_uamp; + val -= RT5033_CHARGER_FAST_CURRENT_MIN; + val /= RT5033_CHARGER_FAST_CURRENT_STEP_NUM; + reg_data = val; + } + + ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL5, + RT5033_CHGCTRL5_ICHG_MASK, + reg_data << RT5033_CHGCTRL5_ICHG_SHIFT); + if (ret) { + dev_err(charger->dev, "Failed regmap update\n"); + return -EINVAL; + } + + return 0; +} + +static inline int rt5033_init_pre_charge(struct rt5033_charger *charger) +{ + struct rt5033_charger_data *chg = charger->chg; + int ret; + unsigned int val; + u8 reg_data; + + /* Set pre-charge threshold voltage */ + if (chg->pre_uvolt < RT5033_CHARGER_PRE_THRESHOLD_LIMIT_MIN || + chg->pre_uvolt > RT5033_CHARGER_PRE_THRESHOLD_LIMIT_MAX) { + dev_err(charger->dev, + "Value 'precharge-upper-limit-microvolt' out of range\n"); + return -EINVAL; + } + + if (chg->pre_uvolt == RT5033_CHARGER_PRE_THRESHOLD_LIMIT_MIN) + reg_data = 0x00; + else if (chg->pre_uvolt == RT5033_CHARGER_PRE_THRESHOLD_LIMIT_MAX) + reg_data = 0x0f; + else { + val = chg->pre_uvolt; + val -= RT5033_CHARGER_PRE_THRESHOLD_LIMIT_MIN; + val /= RT5033_CHARGER_PRE_THRESHOLD_STEP_NUM; + reg_data = val; + } + + ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL5, + RT5033_CHGCTRL5_VPREC_MASK, reg_data); + if (ret) { + dev_err(charger->dev, "Failed regmap update\n"); + return -EINVAL; + } + + /* Set pre-charge mode charging current */ + if (chg->pre_uamp < RT5033_CHARGER_PRE_CURRENT_LIMIT_MIN || + chg->pre_uamp > RT5033_CHARGER_PRE_CURRENT_LIMIT_MAX) { + dev_err(charger->dev, + "Value 'precharge-current-microamp' out of range\n"); + return -EINVAL; + } + + if (chg->pre_uamp == RT5033_CHARGER_PRE_CURRENT_LIMIT_MIN) + reg_data = 0x00; + else if (chg->pre_uamp == RT5033_CHARGER_PRE_CURRENT_LIMIT_MAX) + reg_data = RT5033_CHG_MAX_PRE_CURRENT; + else { + val = chg->pre_uamp; + val -= RT5033_CHARGER_PRE_CURRENT_LIMIT_MIN; + val /= RT5033_CHARGER_PRE_CURRENT_STEP_NUM; + reg_data = val; + } + + ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL4, + RT5033_CHGCTRL4_IPREC_MASK, + reg_data << RT5033_CHGCTRL4_IPREC_SHIFT); + if (ret) { + dev_err(charger->dev, "Failed regmap update\n"); + return -EINVAL; + } + + return 0; +} + +static int rt5033_charger_reg_init(struct rt5033_charger *charger) +{ + int ret = 0; + + /* Enable charging termination */ + ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL1, + RT5033_CHGCTRL1_TE_EN_MASK, RT5033_TE_ENABLE); + if (ret) { + dev_err(charger->dev, "Failed to enable charging termination.\n"); + return -EINVAL; + } + + /* + * Disable minimum input voltage regulation (MIVR), this improves + * the charging performance. + */ + ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL4, + RT5033_CHGCTRL4_MIVR_MASK, RT5033_CHARGER_MIVR_DISABLE); + if (ret) { + dev_err(charger->dev, "Failed to disable MIVR.\n"); + return -EINVAL; + } + + ret = rt5033_init_pre_charge(charger); + if (ret) + return ret; + + ret = rt5033_init_fast_charge(charger); + if (ret) + return ret; + + ret = rt5033_init_const_charge(charger); + if (ret) + return ret; + + return 0; +} + +static enum power_supply_property rt5033_charger_props[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_CHARGE_TYPE, + POWER_SUPPLY_PROP_CURRENT_MAX, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, + POWER_SUPPLY_PROP_MODEL_NAME, + POWER_SUPPLY_PROP_MANUFACTURER, + POWER_SUPPLY_PROP_ONLINE, +}; + +static int rt5033_charger_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct rt5033_charger *charger = power_supply_get_drvdata(psy); + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + val->intval = rt5033_get_charger_state(charger); + break; + case POWER_SUPPLY_PROP_CHARGE_TYPE: + val->intval = rt5033_get_charger_type(charger); + break; + case POWER_SUPPLY_PROP_CURRENT_MAX: + val->intval = rt5033_get_charger_current_limit(charger); + break; + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: + val->intval = rt5033_get_charger_const_voltage(charger); + break; + case POWER_SUPPLY_PROP_MODEL_NAME: + val->strval = RT5033_CHARGER_MODEL; + break; + case POWER_SUPPLY_PROP_MANUFACTURER: + val->strval = RT5033_MANUFACTURER; + break; + case POWER_SUPPLY_PROP_ONLINE: + val->intval = (rt5033_get_charger_state(charger) == + POWER_SUPPLY_STATUS_CHARGING); + break; + default: + return -EINVAL; + } + + return 0; +} + +static struct rt5033_charger_data *rt5033_charger_dt_init( + struct rt5033_charger *charger) +{ + struct rt5033_charger_data *chg; + struct power_supply_battery_info *info; + int ret; + + chg = devm_kzalloc(charger->dev, sizeof(*chg), GFP_KERNEL); + if (!chg) + return ERR_PTR(-ENOMEM); + + ret = power_supply_get_battery_info(charger->psy, &info); + if (ret) + return ERR_PTR(dev_err_probe(charger->dev, -EINVAL, + "missing battery info\n")); + + /* Assign data. Validity will be checked in the init functions. */ + chg->pre_uamp = info->precharge_current_ua; + chg->fast_uamp = info->constant_charge_current_max_ua; + chg->eoc_uamp = info->charge_term_current_ua; + chg->pre_uvolt = info->precharge_voltage_max_uv; + chg->const_uvolt = info->constant_charge_voltage_max_uv; + + return chg; +} + +static const struct power_supply_desc rt5033_charger_desc = { + .name = "rt5033-charger", + .type = POWER_SUPPLY_TYPE_USB, + .properties = rt5033_charger_props, + .num_properties = ARRAY_SIZE(rt5033_charger_props), + .get_property = rt5033_charger_get_property, +}; + +static int rt5033_charger_probe(struct platform_device *pdev) +{ + struct rt5033_charger *charger; + struct power_supply_config psy_cfg = {}; + int ret; + + charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL); + if (!charger) + return -ENOMEM; + + platform_set_drvdata(pdev, charger); + charger->dev = &pdev->dev; + charger->regmap = dev_get_regmap(pdev->dev.parent, NULL); + + psy_cfg.of_node = pdev->dev.of_node; + psy_cfg.drv_data = charger; + + charger->psy = devm_power_supply_register(&pdev->dev, + &rt5033_charger_desc, + &psy_cfg); + if (IS_ERR(charger->psy)) + return dev_err_probe(&pdev->dev, PTR_ERR(charger->psy), + "Failed to register power supply\n"); + + charger->chg = rt5033_charger_dt_init(charger); + if (IS_ERR_OR_NULL(charger->chg)) + return PTR_ERR(charger->chg); + + ret = rt5033_charger_reg_init(charger); + if (ret) + return ret; + + return 0; +} + +static const struct platform_device_id rt5033_charger_id[] = { + { "rt5033-charger", }, + { } +}; +MODULE_DEVICE_TABLE(platform, rt5033_charger_id); + +static const struct of_device_id rt5033_charger_of_match[] = { + { .compatible = "richtek,rt5033-charger", }, + { } +}; +MODULE_DEVICE_TABLE(of, rt5033_charger_of_match); + +static struct platform_driver rt5033_charger_driver = { + .driver = { + .name = "rt5033-charger", + .of_match_table = rt5033_charger_of_match, + }, + .probe = rt5033_charger_probe, + .id_table = rt5033_charger_id, +}; +module_platform_driver(rt5033_charger_driver); + +MODULE_DESCRIPTION("Richtek RT5033 charger driver"); +MODULE_AUTHOR("Beomho Seo "); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/mfd/rt5033.h b/include/linux/mfd/rt5033.h index e99e2ab0c1c1..3992fb2ef0a8 100644 --- a/include/linux/mfd/rt5033.h +++ b/include/linux/mfd/rt5033.h @@ -39,20 +39,4 @@ struct rt5033_battery { struct power_supply *psy; }; -/* RT5033 charger platform data */ -struct rt5033_charger_data { - unsigned int pre_uamp; - unsigned int pre_uvolt; - unsigned int const_uvolt; - unsigned int eoc_uamp; - unsigned int fast_uamp; -}; - -struct rt5033_charger { - struct device *dev; - struct rt5033_dev *rt5033; - struct power_supply *psy; - struct rt5033_charger_data *chg; -}; - #endif /* __RT5033_H__ */