// SPDX-License-Identifier: GPL-2.0-only
/*
 * Battery driver for Marvell 88PM860x PMIC
 *
 * Copyright (c) 2012 Marvell International Ltd.
 * Author:      Jett Zhou <jtzhou@marvell.com>
 *              Haojian Zhuang <haojian.zhuang@marvell.com>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/power_supply.h>
#include <linux/mfd/88pm860x.h>
#include <linux/delay.h>
#include <linux/uaccess.h>
#include <asm/div64.h>

/* bit definitions of Status Query Interface 2 */
#define STATUS2_CHG             (1 << 2)

/* bit definitions of Reset Out Register */
#define RESET_SW_PD             (1 << 7)

/* bit definitions of PreReg 1 */
#define PREREG1_90MA            (0x0)
#define PREREG1_180MA           (0x1)
#define PREREG1_450MA           (0x4)
#define PREREG1_540MA           (0x5)
#define PREREG1_1350MA          (0xE)
#define PREREG1_VSYS_4_5V       (3 << 4)

/* bit definitions of Charger Control 1 Register */
#define CC1_MODE_OFF            (0)
#define CC1_MODE_PRECHARGE      (1)
#define CC1_MODE_FASTCHARGE     (2)
#define CC1_MODE_PULSECHARGE    (3)
#define CC1_ITERM_20MA          (0 << 2)
#define CC1_ITERM_60MA          (2 << 2)
#define CC1_VFCHG_4_2V          (9 << 4)

/* bit definitions of Charger Control 2 Register */
#define CC2_ICHG_100MA          (0x1)
#define CC2_ICHG_500MA          (0x9)
#define CC2_ICHG_1000MA         (0x13)

/* bit definitions of Charger Control 3 Register */
#define CC3_180MIN_TIMEOUT      (0x6 << 4)
#define CC3_270MIN_TIMEOUT      (0x7 << 4)
#define CC3_360MIN_TIMEOUT      (0xA << 4)
#define CC3_DISABLE_TIMEOUT     (0xF << 4)

/* bit definitions of Charger Control 4 Register */
#define CC4_IPRE_40MA           (7)
#define CC4_VPCHG_3_2V          (3 << 4)
#define CC4_IFCHG_MON_EN        (1 << 6)
#define CC4_BTEMP_MON_EN        (1 << 7)

/* bit definitions of Charger Control 6 Register */
#define CC6_BAT_OV_EN           (1 << 2)
#define CC6_BAT_UV_EN           (1 << 3)
#define CC6_UV_VBAT_SET         (0x3 << 6)      /* 2.8v */

/* bit definitions of Charger Control 7 Register */
#define CC7_BAT_REM_EN          (1 << 3)
#define CC7_IFSM_EN             (1 << 7)

/* bit definitions of Measurement Enable 1 Register */
#define MEAS1_VBAT              (1 << 0)

/* bit definitions of Measurement Enable 3 Register */
#define MEAS3_IBAT_EN           (1 << 0)
#define MEAS3_CC_EN             (1 << 2)

#define FSM_INIT                0
#define FSM_DISCHARGE           1
#define FSM_PRECHARGE           2
#define FSM_FASTCHARGE          3

#define PRECHARGE_THRESHOLD     3100
#define POWEROFF_THRESHOLD      3400
#define CHARGE_THRESHOLD        4000
#define DISCHARGE_THRESHOLD     4180

/* over-temperature on PM8606 setting */
#define OVER_TEMP_FLAG          (1 << 6)
#define OVTEMP_AUTORECOVER      (1 << 3)

/* over-voltage protect on vchg setting mv */
#define VCHG_NORMAL_LOW         4200
#define VCHG_NORMAL_CHECK       5800
#define VCHG_NORMAL_HIGH        6000
#define VCHG_OVP_LOW            5500

struct pm860x_charger_info {
        struct pm860x_chip *chip;
        struct i2c_client *i2c;
        struct i2c_client *i2c_8606;
        struct device *dev;

        struct power_supply *usb;
        struct mutex lock;
        int irq_nums;
        int irq[7];
        unsigned state:3;       /* fsm state */
        unsigned online:1;      /* usb charger */
        unsigned present:1;     /* battery present */
        unsigned allowed:1;
};

static char *pm860x_supplied_to[] = {
        "battery-monitor",
};

static int measure_vchg(struct pm860x_charger_info *info, int *data)
{
        unsigned char buf[2];
        int ret = 0;

        ret = pm860x_bulk_read(info->i2c, PM8607_VCHG_MEAS1, 2, buf);
        if (ret < 0)
                return ret;

        *data = ((buf[0] & 0xff) << 4) | (buf[1] & 0x0f);
        /* V_BATT_MEAS(mV) = value * 5 * 1.8 * 1000 / (2^12) */
        *data = ((*data & 0xfff) * 9 * 125) >> 9;

        dev_dbg(info->dev, "%s, vchg: %d mv\n", __func__, *data);

        return ret;
}

static void set_vchg_threshold(struct pm860x_charger_info *info,
                               int min, int max)
{
        int data;

        /* (tmp << 8) * / 5 / 1800 */
        if (min <= 0)
                data = 0;
        else
                data = (min << 5) / 1125;
        pm860x_reg_write(info->i2c, PM8607_VCHG_LOWTH, data);
        dev_dbg(info->dev, "VCHG_LOWTH:%dmv, 0x%x\n", min, data);

        if (max <= 0)
                data = 0xff;
        else
                data = (max << 5) / 1125;
        pm860x_reg_write(info->i2c, PM8607_VCHG_HIGHTH, data);
        dev_dbg(info->dev, "VCHG_HIGHTH:%dmv, 0x%x\n", max, data);

}

static void set_vbatt_threshold(struct pm860x_charger_info *info,
                                int min, int max)
{
        int data;

        /* (tmp << 8) * 3 / 1800 */
        if (min <= 0)
                data = 0;
        else
                data = (min << 5) / 675;
        pm860x_reg_write(info->i2c, PM8607_VBAT_LOWTH, data);
        dev_dbg(info->dev, "VBAT Min:%dmv, LOWTH:0x%x\n", min, data);

        if (max <= 0)
                data = 0xff;
        else
                data = (max << 5) / 675;
        pm860x_reg_write(info->i2c, PM8607_VBAT_HIGHTH, data);
        dev_dbg(info->dev, "VBAT Max:%dmv, HIGHTH:0x%x\n", max, data);

        return;
}

static int start_precharge(struct pm860x_charger_info *info)
{
        int ret;

        dev_dbg(info->dev, "Start Pre-charging!\n");
        set_vbatt_threshold(info, 0, 0);

        ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA,
                               PREREG1_1350MA | PREREG1_VSYS_4_5V);
        if (ret < 0)
                goto out;
        /* stop charging */
        ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
                              CC1_MODE_OFF);
        if (ret < 0)
                goto out;
        /* set 270 minutes timeout */
        ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4),
                              CC3_270MIN_TIMEOUT);
        if (ret < 0)
                goto out;
        /* set precharge current, termination voltage, IBAT & TBAT monitor */
        ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL4,
                               CC4_IPRE_40MA | CC4_VPCHG_3_2V |
                               CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN);
        if (ret < 0)
                goto out;
        ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7,
                              CC7_BAT_REM_EN | CC7_IFSM_EN,
                              CC7_BAT_REM_EN | CC7_IFSM_EN);
        if (ret < 0)
                goto out;
        /* trigger precharge */
        ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
                              CC1_MODE_PRECHARGE);
out:
        return ret;
}

static int start_fastcharge(struct pm860x_charger_info *info)
{
        int ret;

        dev_dbg(info->dev, "Start Fast-charging!\n");

        /* set fastcharge termination current & voltage, disable charging */
        ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL1,
                               CC1_MODE_OFF | CC1_ITERM_60MA |
                               CC1_VFCHG_4_2V);
        if (ret < 0)
                goto out;
        ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA,
                               PREREG1_540MA | PREREG1_VSYS_4_5V);
        if (ret < 0)
                goto out;
        ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL2, 0x1f,
                              CC2_ICHG_500MA);
        if (ret < 0)
                goto out;
        /* set 270 minutes timeout */
        ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4),
                              CC3_270MIN_TIMEOUT);
        if (ret < 0)
                goto out;
        /* set IBAT & TBAT monitor */
        ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL4,
                              CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN,
                              CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN);
        if (ret < 0)
                goto out;
        ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL6,
                              CC6_BAT_OV_EN | CC6_BAT_UV_EN |
                              CC6_UV_VBAT_SET,
                              CC6_BAT_OV_EN | CC6_BAT_UV_EN |
                              CC6_UV_VBAT_SET);
        if (ret < 0)
                goto out;
        ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7,
                              CC7_BAT_REM_EN | CC7_IFSM_EN,
                              CC7_BAT_REM_EN | CC7_IFSM_EN);
        if (ret < 0)
                goto out;
        /* launch fast-charge */
        ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
                              CC1_MODE_FASTCHARGE);
        /* vchg threshold setting */
        set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_NORMAL_HIGH);
out:
        return ret;
}

static void stop_charge(struct pm860x_charger_info *info, int vbatt)
{
        dev_dbg(info->dev, "Stop charging!\n");
        pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3, CC1_MODE_OFF);
        if (vbatt > CHARGE_THRESHOLD && info->online)
                set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
}

static void power_off_notification(struct pm860x_charger_info *info)
{
        dev_dbg(info->dev, "Power-off notification!\n");
}

static int set_charging_fsm(struct pm860x_charger_info *info)
{
        struct power_supply *psy;
        union power_supply_propval data;
        static const unsigned char fsm_state[][16] = {
                "init", "discharge", "precharge", "fastcharge",
        };
        int ret;
        int vbatt;

        psy = power_supply_get_by_name(pm860x_supplied_to[0]);
        if (!psy)
                return -EINVAL;
        ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
                        &data);
        if (ret) {
                power_supply_put(psy);
                return ret;
        }
        vbatt = data.intval / 1000;

        ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_PRESENT, &data);
        if (ret) {
                power_supply_put(psy);
                return ret;
        }
        power_supply_put(psy);

        mutex_lock(&info->lock);
        info->present = data.intval;

        dev_dbg(info->dev, "Entering FSM:%s, Charger:%s, Battery:%s, "
                "Allowed:%d\n",
                fsm_state[info->state],
                (info->online) ? "online" : "N/A",
                (info->present) ? "present" : "N/A", info->allowed);
        dev_dbg(info->dev, "set_charging_fsm:vbatt:%d(mV)\n", vbatt);

        switch (info->state) {
        case FSM_INIT:
                if (info->online && info->present && info->allowed) {
                        if (vbatt < PRECHARGE_THRESHOLD) {
                                info->state = FSM_PRECHARGE;
                                start_precharge(info);
                        } else if (vbatt > DISCHARGE_THRESHOLD) {
                                info->state = FSM_DISCHARGE;
                                stop_charge(info, vbatt);
                        } else if (vbatt < DISCHARGE_THRESHOLD) {
                                info->state = FSM_FASTCHARGE;
                                start_fastcharge(info);
                        }
                } else {
                        if (vbatt < POWEROFF_THRESHOLD) {
                                power_off_notification(info);
                        } else {
                                info->state = FSM_DISCHARGE;
                                stop_charge(info, vbatt);
                        }
                }
                break;
        case FSM_PRECHARGE:
                if (info->online && info->present && info->allowed) {
                        if (vbatt > PRECHARGE_THRESHOLD) {
                                info->state = FSM_FASTCHARGE;
                                start_fastcharge(info);
                        }
                } else {
                        info->state = FSM_DISCHARGE;
                        stop_charge(info, vbatt);
                }
                break;
        case FSM_FASTCHARGE:
                if (info->online && info->present && info->allowed) {
                        if (vbatt < PRECHARGE_THRESHOLD) {
                                info->state = FSM_PRECHARGE;
                                start_precharge(info);
                        }
                } else {
                        info->state = FSM_DISCHARGE;
                        stop_charge(info, vbatt);
                }
                break;
        case FSM_DISCHARGE:
                if (info->online && info->present && info->allowed) {
                        if (vbatt < PRECHARGE_THRESHOLD) {
                                info->state = FSM_PRECHARGE;
                                start_precharge(info);
                        } else if (vbatt < DISCHARGE_THRESHOLD) {
                                info->state = FSM_FASTCHARGE;
                                start_fastcharge(info);
                        }
                } else {
                        if (vbatt < POWEROFF_THRESHOLD)
                                power_off_notification(info);
                        else if (vbatt > CHARGE_THRESHOLD && info->online)
                                set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
                }
                break;
        default:
                dev_warn(info->dev, "FSM meets wrong state:%d\n",
                         info->state);
                break;
        }
        dev_dbg(info->dev,
                "Out FSM:%s, Charger:%s, Battery:%s, Allowed:%d\n",
                fsm_state[info->state],
                (info->online) ? "online" : "N/A",
                (info->present) ? "present" : "N/A", info->allowed);
        mutex_unlock(&info->lock);

        return 0;
}

static irqreturn_t pm860x_charger_handler(int irq, void *data)
{
        struct pm860x_charger_info *info = data;
        int ret;

        mutex_lock(&info->lock);
        ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
        if (ret < 0) {
                mutex_unlock(&info->lock);
                goto out;
        }
        if (ret & STATUS2_CHG) {
                info->online = 1;
                info->allowed = 1;
        } else {
                info->online = 0;
                info->allowed = 0;
        }
        mutex_unlock(&info->lock);
        dev_dbg(info->dev, "%s, Charger:%s, Allowed:%d\n", __func__,
                (info->online) ? "online" : "N/A", info->allowed);

        set_charging_fsm(info);

        power_supply_changed(info->usb);
out:
        return IRQ_HANDLED;
}

static irqreturn_t pm860x_temp_handler(int irq, void *data)
{
        struct power_supply *psy;
        struct pm860x_charger_info *info = data;
        union power_supply_propval temp;
        int value;
        int ret;

        psy = power_supply_get_by_name(pm860x_supplied_to[0]);
        if (!psy)
                return IRQ_HANDLED;
        ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_TEMP, &temp);
        if (ret)
                goto out;
        value = temp.intval / 10;

        mutex_lock(&info->lock);
        /* Temperature < -10 C or >40 C, Will not allow charge */
        if (value < -10 || value > 40)
                info->allowed = 0;
        else
                info->allowed = 1;
        dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
        mutex_unlock(&info->lock);

        set_charging_fsm(info);
out:
        power_supply_put(psy);
        return IRQ_HANDLED;
}

static irqreturn_t pm860x_exception_handler(int irq, void *data)
{
        struct pm860x_charger_info *info = data;

        mutex_lock(&info->lock);
        info->allowed = 0;
        mutex_unlock(&info->lock);
        dev_dbg(info->dev, "%s, irq: %d\n", __func__, irq);

        set_charging_fsm(info);
        return IRQ_HANDLED;
}

static irqreturn_t pm860x_done_handler(int irq, void *data)
{
        struct pm860x_charger_info *info = data;
        struct power_supply *psy;
        union power_supply_propval val;
        int ret;
        int vbatt;

        mutex_lock(&info->lock);
        /* pre-charge done, will transimit to fast-charge stage */
        if (info->state == FSM_PRECHARGE) {
                info->allowed = 1;
                goto out;
        }
        /*
         * Fast charge done, delay to read
         * the correct status of CHG_DET.
         */
        mdelay(5);
        info->allowed = 0;
        psy = power_supply_get_by_name(pm860x_supplied_to[0]);
        if (!psy)
                goto out;
        ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
                        &val);
        if (ret)
                goto out_psy_put;
        vbatt = val.intval / 1000;
        /*
         * CHG_DONE interrupt is faster than CHG_DET interrupt when
         * plug in/out usb, So we can not rely on info->online, we
         * need check pm8607 status register to check usb is online
         * or not, then we can decide it is real charge done
         * automatically or it is triggered by usb plug out;
         */
        ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
        if (ret < 0)
                goto out_psy_put;
        if (vbatt > CHARGE_THRESHOLD && ret & STATUS2_CHG)
                power_supply_set_property(psy, POWER_SUPPLY_PROP_CHARGE_FULL,
                                &val);

out_psy_put:
        power_supply_put(psy);
out:
        mutex_unlock(&info->lock);
        dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
        set_charging_fsm(info);

        return IRQ_HANDLED;
}

static irqreturn_t pm860x_vbattery_handler(int irq, void *data)
{
        struct pm860x_charger_info *info = data;

        mutex_lock(&info->lock);

        set_vbatt_threshold(info, 0, 0);

        if (info->present && info->online)
                info->allowed = 1;
        else
                info->allowed = 0;
        mutex_unlock(&info->lock);
        dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);

        set_charging_fsm(info);

        return IRQ_HANDLED;
}

static irqreturn_t pm860x_vchg_handler(int irq, void *data)
{
        struct pm860x_charger_info *info = data;
        int vchg = 0;

        if (info->present)
                goto out;

        measure_vchg(info, &vchg);

        mutex_lock(&info->lock);
        if (!info->online) {
                int status;
                /* check if over-temp on pm8606 or not */
                status = pm860x_reg_read(info->i2c_8606, PM8606_FLAGS);
                if (status & OVER_TEMP_FLAG) {
                        /* clear over temp flag and set auto recover */
                        pm860x_set_bits(info->i2c_8606, PM8606_FLAGS,
                                        OVER_TEMP_FLAG, OVER_TEMP_FLAG);
                        pm860x_set_bits(info->i2c_8606,
                                        PM8606_VSYS,
                                        OVTEMP_AUTORECOVER,
                                        OVTEMP_AUTORECOVER);
                        dev_dbg(info->dev,
                                "%s, pm8606 over-temp occurred\n", __func__);
                }
        }

        if (vchg > VCHG_NORMAL_CHECK) {
                set_vchg_threshold(info, VCHG_OVP_LOW, 0);
                info->allowed = 0;
                dev_dbg(info->dev,
                        "%s,pm8607 over-vchg occurred,vchg = %dmv\n",
                        __func__, vchg);
        } else if (vchg < VCHG_OVP_LOW) {
                set_vchg_threshold(info, VCHG_NORMAL_LOW,
                                   VCHG_NORMAL_HIGH);
                info->allowed = 1;
                dev_dbg(info->dev,
                        "%s,pm8607 over-vchg recover,vchg = %dmv\n",
                        __func__, vchg);
        }
        mutex_unlock(&info->lock);

        dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
        set_charging_fsm(info);
out:
        return IRQ_HANDLED;
}

static int pm860x_usb_get_prop(struct power_supply *psy,
                               enum power_supply_property psp,
                               union power_supply_propval *val)
{
        struct pm860x_charger_info *info = power_supply_get_drvdata(psy);

        switch (psp) {
        case POWER_SUPPLY_PROP_STATUS:
                if (info->state == FSM_FASTCHARGE ||
                                info->state == FSM_PRECHARGE)
                        val->intval = POWER_SUPPLY_STATUS_CHARGING;
                else
                        val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
                break;
        case POWER_SUPPLY_PROP_ONLINE:
                val->intval = info->online;
                break;
        default:
                return -ENODEV;
        }
        return 0;
}

static enum power_supply_property pm860x_usb_props[] = {
        POWER_SUPPLY_PROP_STATUS,
        POWER_SUPPLY_PROP_ONLINE,
};

static int pm860x_init_charger(struct pm860x_charger_info *info)
{
        int ret;

        ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
        if (ret < 0)
                return ret;

        mutex_lock(&info->lock);
        info->state = FSM_INIT;
        if (ret & STATUS2_CHG) {
                info->online = 1;
                info->allowed = 1;
        } else {
                info->online = 0;
                info->allowed = 0;
        }
        mutex_unlock(&info->lock);

        set_charging_fsm(info);
        return 0;
}

static struct pm860x_irq_desc {
        const char *name;
        irqreturn_t (*handler)(int irq, void *data);
} pm860x_irq_descs[] = {
        { "usb supply detect", pm860x_charger_handler },
        { "charge done", pm860x_done_handler },
        { "charge timeout", pm860x_exception_handler },
        { "charge fault", pm860x_exception_handler },
        { "temperature", pm860x_temp_handler },
        { "vbatt", pm860x_vbattery_handler },
        { "vchg", pm860x_vchg_handler },
};

static const struct power_supply_desc pm860x_charger_desc = {
        .name           = "usb",
        .type           = POWER_SUPPLY_TYPE_USB,
        .properties     = pm860x_usb_props,
        .num_properties = ARRAY_SIZE(pm860x_usb_props),
        .get_property   = pm860x_usb_get_prop,
};

static int pm860x_charger_probe(struct platform_device *pdev)
{
        struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
        struct power_supply_config psy_cfg = {};
        struct pm860x_charger_info *info;
        int ret;
        int count;
        int i;
        int j;

        info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
        if (!info)
                return -ENOMEM;

        count = pdev->num_resources;
        for (i = 0, j = 0; i < count; i++) {
                info->irq[j] = platform_get_irq(pdev, i);
                if (info->irq[j] < 0)
                        continue;
                j++;
        }
        info->irq_nums = j;

        info->chip = chip;
        info->i2c =
            (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
        info->i2c_8606 =
            (chip->id == CHIP_PM8607) ? chip->companion : chip->client;
        if (!info->i2c_8606) {
                dev_err(&pdev->dev, "Missed I2C address of 88PM8606!\n");
                return -EINVAL;
        }
        info->dev = &pdev->dev;

        /* set init value for the case we are not using battery */
        set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_OVP_LOW);

        mutex_init(&info->lock);
        platform_set_drvdata(pdev, info);

        psy_cfg.drv_data = info;
        psy_cfg.supplied_to = pm860x_supplied_to;
        psy_cfg.num_supplicants = ARRAY_SIZE(pm860x_supplied_to);
        info->usb = devm_power_supply_register(&pdev->dev, &pm860x_charger_desc,
                                               &psy_cfg);
        if (IS_ERR(info->usb)) {
                return PTR_ERR(info->usb);
        }

        pm860x_init_charger(info);

        for (i = 0; i < ARRAY_SIZE(info->irq); i++) {
                ret = devm_request_threaded_irq(&pdev->dev, info->irq[i], NULL,
                                                pm860x_irq_descs[i].handler,
                                                IRQF_ONESHOT,
                                                pm860x_irq_descs[i].name, info);
                if (ret < 0) {
                        dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
                                info->irq[i], ret);
                        return ret;
                }
        }
        return 0;
}

static struct platform_driver pm860x_charger_driver = {
        .driver = {
                   .name = "88pm860x-charger",
        },
        .probe = pm860x_charger_probe,
};
module_platform_driver(pm860x_charger_driver);

MODULE_DESCRIPTION("Marvell 88PM860x Charger driver");
MODULE_LICENSE("GPL");