// 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, &reg_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, &reg_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, &reg_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, &reg_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");