diff options
Diffstat (limited to 'drivers/power/supply/rt5033_charger.c')
| -rw-r--r-- | drivers/power/supply/rt5033_charger.c | 753 |
1 files changed, 753 insertions, 0 deletions
diff --git a/drivers/power/supply/rt5033_charger.c b/drivers/power/supply/rt5033_charger.c new file mode 100644 index 000000000000..de724f23e453 --- /dev/null +++ b/drivers/power/supply/rt5033_charger.c @@ -0,0 +1,753 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Battery charger driver for RT5033 + * + * Copyright (C) 2014 Samsung Electronics, Co., Ltd. + * Author: Beomho Seo <beomho.seo@samsung.com> + */ + +#include <linux/devm-helpers.h> +#include <linux/extcon.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/power_supply.h> +#include <linux/regmap.h> +#include <linux/mfd/rt5033-private.h> +#include <linux/property.h> + +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; + struct extcon_dev *edev; + struct notifier_block extcon_nb; + struct work_struct extcon_work; + struct mutex lock; + bool online; + bool otg; + bool mivr_enabled; + u8 cv_regval; +}; + +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; + } + + /* For OTG mode, RT5033 would still report "charging" */ + if (charger->otg) + state = POWER_SUPPLY_STATUS_DISCHARGING; + + 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; + } + + /* Store that value for later usage */ + charger->cv_regval = reg_data; + + /* 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 int rt5033_charger_set_otg(struct rt5033_charger *charger) +{ + int ret; + + mutex_lock(&charger->lock); + + /* Set OTG boost v_out to 5 volts */ + ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL2, + RT5033_CHGCTRL2_CV_MASK, + 0x37 << RT5033_CHGCTRL2_CV_SHIFT); + if (ret) { + dev_err(charger->dev, "Failed set OTG boost v_out\n"); + ret = -EINVAL; + goto out_unlock; + } + + /* Set operation mode to OTG */ + ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL1, + RT5033_CHGCTRL1_MODE_MASK, RT5033_BOOST_MODE); + if (ret) { + dev_err(charger->dev, "Failed to update OTG mode.\n"); + ret = -EINVAL; + goto out_unlock; + } + + /* In case someone switched from charging to OTG directly */ + if (charger->online) + charger->online = false; + + charger->otg = true; + +out_unlock: + mutex_unlock(&charger->lock); + + return ret; +} + +static int rt5033_charger_unset_otg(struct rt5033_charger *charger) +{ + int ret; + u8 data; + + /* Restore constant voltage for charging */ + data = charger->cv_regval; + ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL2, + RT5033_CHGCTRL2_CV_MASK, + data << RT5033_CHGCTRL2_CV_SHIFT); + if (ret) { + dev_err(charger->dev, "Failed to restore constant voltage\n"); + return -EINVAL; + } + + /* Set operation mode to charging */ + ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL1, + RT5033_CHGCTRL1_MODE_MASK, RT5033_CHARGER_MODE); + if (ret) { + dev_err(charger->dev, "Failed to update charger mode.\n"); + return -EINVAL; + } + + charger->otg = false; + + return 0; +} + +static int rt5033_charger_set_charging(struct rt5033_charger *charger) +{ + int ret; + + mutex_lock(&charger->lock); + + /* In case someone switched from OTG to charging directly */ + if (charger->otg) { + ret = rt5033_charger_unset_otg(charger); + if (ret) { + mutex_unlock(&charger->lock); + return -EINVAL; + } + } + + charger->online = true; + + mutex_unlock(&charger->lock); + + return 0; +} + +static int rt5033_charger_set_mivr(struct rt5033_charger *charger) +{ + int ret; + + mutex_lock(&charger->lock); + + /* + * When connected via USB connector type SDP (Standard Downstream Port), + * the minimum input voltage regulation (MIVR) should be enabled. It + * prevents an input voltage drop due to insufficient current provided + * by the adapter or USB input. As a downside, it may reduces the + * charging current and thus slows the charging. + */ + ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL4, + RT5033_CHGCTRL4_MIVR_MASK, RT5033_CHARGER_MIVR_4600MV); + if (ret) { + dev_err(charger->dev, "Failed to set MIVR level.\n"); + mutex_unlock(&charger->lock); + return -EINVAL; + } + + charger->mivr_enabled = true; + + mutex_unlock(&charger->lock); + + /* Beyond this, do the same steps like setting charging */ + rt5033_charger_set_charging(charger); + + return 0; +} + +static int rt5033_charger_set_disconnect(struct rt5033_charger *charger) +{ + int ret = 0; + + mutex_lock(&charger->lock); + + /* Disable MIVR if enabled */ + if (charger->mivr_enabled) { + 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"); + ret = -EINVAL; + goto out_unlock; + } + + charger->mivr_enabled = false; + } + + if (charger->otg) { + ret = rt5033_charger_unset_otg(charger); + if (ret) { + ret = -EINVAL; + goto out_unlock; + } + } + + if (charger->online) + charger->online = false; + +out_unlock: + mutex_unlock(&charger->lock); + + return ret; +} + +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 = charger->online; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int rt5033_charger_dt_init(struct rt5033_charger *charger) +{ + struct rt5033_charger_data *chg = &charger->chg; + struct power_supply_battery_info *info; + int ret; + + ret = power_supply_get_battery_info(charger->psy, &info); + if (ret) + return 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 0; +} + +static void rt5033_charger_extcon_work(struct work_struct *work) +{ + struct rt5033_charger *charger = + container_of(work, struct rt5033_charger, extcon_work); + struct extcon_dev *edev = charger->edev; + int connector, state; + int ret; + + for (connector = EXTCON_USB_HOST; connector <= EXTCON_CHG_USB_PD; + connector++) { + state = extcon_get_state(edev, connector); + if (state == 1) + break; + } + + /* + * Adding a delay between extcon notification and extcon action. This + * makes extcon action execution more reliable. Without the delay the + * execution sometimes fails, possibly because the chip is busy or not + * ready. + */ + msleep(100); + + switch (connector) { + case EXTCON_CHG_USB_SDP: + ret = rt5033_charger_set_mivr(charger); + if (ret) { + dev_err(charger->dev, "failed to set USB mode\n"); + break; + } + dev_info(charger->dev, "USB mode. connector type: %d\n", + connector); + break; + case EXTCON_CHG_USB_DCP: + case EXTCON_CHG_USB_CDP: + case EXTCON_CHG_USB_ACA: + case EXTCON_CHG_USB_FAST: + case EXTCON_CHG_USB_SLOW: + case EXTCON_CHG_WPT: + case EXTCON_CHG_USB_PD: + ret = rt5033_charger_set_charging(charger); + if (ret) { + dev_err(charger->dev, "failed to set charging\n"); + break; + } + dev_info(charger->dev, "charging. connector type: %d\n", + connector); + break; + case EXTCON_USB_HOST: + ret = rt5033_charger_set_otg(charger); + if (ret) { + dev_err(charger->dev, "failed to set OTG\n"); + break; + } + dev_info(charger->dev, "OTG enabled\n"); + break; + default: + ret = rt5033_charger_set_disconnect(charger); + if (ret) { + dev_err(charger->dev, "failed to set disconnect\n"); + break; + } + dev_info(charger->dev, "disconnected\n"); + break; + } + + power_supply_changed(charger->psy); +} + +static int rt5033_charger_extcon_notifier(struct notifier_block *nb, + unsigned long event, void *param) +{ + struct rt5033_charger *charger = + container_of(nb, struct rt5033_charger, extcon_nb); + + schedule_work(&charger->extcon_work); + + return NOTIFY_OK; +} + +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 = {}; + struct device_node *np_conn, *np_edev; + 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); + mutex_init(&charger->lock); + + psy_cfg.fwnode = dev_fwnode(&pdev->dev); + psy_cfg.drv_data = charger; + + charger->psy = devm_power_supply_register(charger->dev, + &rt5033_charger_desc, + &psy_cfg); + if (IS_ERR(charger->psy)) + return dev_err_probe(charger->dev, PTR_ERR(charger->psy), + "Failed to register power supply\n"); + + ret = rt5033_charger_dt_init(charger); + if (ret) + return ret; + + ret = rt5033_charger_reg_init(charger); + if (ret) + return ret; + + /* + * Extcon support is not vital for the charger to work. If no extcon + * is available, just emit a warning and leave the probe function. + */ + np_conn = of_parse_phandle(pdev->dev.of_node, "richtek,usb-connector", 0); + np_edev = of_get_parent(np_conn); + charger->edev = extcon_find_edev_by_node(np_edev); + of_node_put(np_edev); + of_node_put(np_conn); + if (IS_ERR(charger->edev)) { + dev_warn(charger->dev, "no extcon device found in device-tree\n"); + goto out; + } + + ret = devm_work_autocancel(charger->dev, &charger->extcon_work, + rt5033_charger_extcon_work); + if (ret) { + dev_err(charger->dev, "failed to initialize extcon work\n"); + return ret; + } + + charger->extcon_nb.notifier_call = rt5033_charger_extcon_notifier; + ret = devm_extcon_register_notifier_all(charger->dev, charger->edev, + &charger->extcon_nb); + if (ret) { + dev_err(charger->dev, "failed to register extcon notifier\n"); + return ret; + } +out: + 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 <beomho.seo@samsung.com>"); +MODULE_LICENSE("GPL v2"); |