// SPDX-License-Identifier: GPL-2.0
//
// FAN53555 Fairchild Digitally Programmable TinyBuck Regulator Driver.
//
// Supported Part Numbers:
// FAN53555UC00X/01X/03X/04X/05X
//
// Copyright (c) 2012 Marvell Technology Ltd.
// Yunfan Zhang <yfzhang@marvell.com>

#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/param.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/fan53555.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>

/* Voltage setting */
#define FAN53555_VSEL0          0x00
#define FAN53555_VSEL1          0x01

#define RK8602_VSEL0            0x06
#define RK8602_VSEL1            0x07

#define TCS4525_VSEL0           0x11
#define TCS4525_VSEL1           0x10
#define TCS4525_TIME            0x13
#define TCS4525_COMMAND         0x14

/* Control register */
#define FAN53555_CONTROL        0x02
/* IC Type */
#define FAN53555_ID1            0x03
/* IC mask version */
#define FAN53555_ID2            0x04
/* Monitor register */
#define FAN53555_MONITOR        0x05

/* VSEL bit definitions */
#define VSEL_BUCK_EN            BIT(7)
#define VSEL_MODE               BIT(6)
/* Chip ID and Version */
#define DIE_ID                  0x0F    /* ID1 */
#define DIE_REV                 0x0F    /* ID2 */
/* Control bit definitions */
#define CTL_OUTPUT_DISCHG       BIT(7)
#define CTL_SLEW_MASK           GENMASK(6, 4)
#define CTL_RESET               BIT(2)
#define CTL_MODE_VSEL0_MODE     BIT(0)
#define CTL_MODE_VSEL1_MODE     BIT(1)

#define FAN53555_NVOLTAGES      64      /* Numbers of voltages */
#define FAN53526_NVOLTAGES      128
#define RK8602_NVOLTAGES        160

#define TCS_VSEL0_MODE          BIT(7)
#define TCS_VSEL1_MODE          BIT(6)

#define TCS_SLEW_MASK           GENMASK(4, 3)

enum fan53555_vendor {
        FAN53526_VENDOR_FAIRCHILD = 0,
        FAN53555_VENDOR_FAIRCHILD,
        FAN53555_VENDOR_ROCKCHIP,       /* RK8600, RK8601 */
        RK8602_VENDOR_ROCKCHIP,         /* RK8602, RK8603 */
        FAN53555_VENDOR_SILERGY,
        FAN53526_VENDOR_TCS,
};

enum {
        FAN53526_CHIP_ID_01 = 1,
};

enum {
        FAN53526_CHIP_REV_08 = 8,
};

/* IC Type */
enum {
        FAN53555_CHIP_ID_00 = 0,
        FAN53555_CHIP_ID_01,
        FAN53555_CHIP_ID_02,
        FAN53555_CHIP_ID_03,
        FAN53555_CHIP_ID_04,
        FAN53555_CHIP_ID_05,
        FAN53555_CHIP_ID_08 = 8,
};

enum {
        RK8600_CHIP_ID_08 = 8,          /* RK8600, RK8601 */
};

enum {
        RK8602_CHIP_ID_10 = 10,         /* RK8602, RK8603 */
};

enum {
        TCS4525_CHIP_ID_12 = 12,
};

enum {
        TCS4526_CHIP_ID_00 = 0,
};

/* IC mask revision */
enum {
        FAN53555_CHIP_REV_00 = 0x3,
        FAN53555_CHIP_REV_13 = 0xf,
};

enum {
        SILERGY_SYR82X = 8,
        SILERGY_SYR83X = 9,
};

struct fan53555_device_info {
        enum fan53555_vendor vendor;
        struct device *dev;
        struct regulator_desc desc;
        struct regulator_init_data *regulator;
        /* IC Type and Rev */
        int chip_id;
        int chip_rev;
        /* Voltage setting register */
        unsigned int vol_reg;
        unsigned int sleep_reg;
        unsigned int en_reg;
        unsigned int sleep_en_reg;
        /* Voltage range and step(linear) */
        unsigned int vsel_min;
        unsigned int vsel_step;
        unsigned int vsel_count;
        /* Mode */
        unsigned int mode_reg;
        unsigned int mode_mask;
        /* Sleep voltage cache */
        unsigned int sleep_vol_cache;
        /* Slew rate */
        unsigned int slew_reg;
        unsigned int slew_mask;
        const unsigned int *ramp_delay_table;
        unsigned int n_ramp_values;
        unsigned int enable_time;
        unsigned int slew_rate;
};

static int fan53555_set_suspend_voltage(struct regulator_dev *rdev, int uV)
{
        struct fan53555_device_info *di = rdev_get_drvdata(rdev);
        int ret;

        if (di->sleep_vol_cache == uV)
                return 0;
        ret = regulator_map_voltage_linear(rdev, uV, uV);
        if (ret < 0)
                return ret;
        ret = regmap_update_bits(rdev->regmap, di->sleep_reg,
                                 di->desc.vsel_mask, ret);
        if (ret < 0)
                return ret;
        /* Cache the sleep voltage setting.
         * Might not be the real voltage which is rounded */
        di->sleep_vol_cache = uV;

        return 0;
}

static int fan53555_set_suspend_enable(struct regulator_dev *rdev)
{
        struct fan53555_device_info *di = rdev_get_drvdata(rdev);

        return regmap_update_bits(rdev->regmap, di->sleep_en_reg,
                                  VSEL_BUCK_EN, VSEL_BUCK_EN);
}

static int fan53555_set_suspend_disable(struct regulator_dev *rdev)
{
        struct fan53555_device_info *di = rdev_get_drvdata(rdev);

        return regmap_update_bits(rdev->regmap, di->sleep_en_reg,
                                  VSEL_BUCK_EN, 0);
}

static int fan53555_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
        struct fan53555_device_info *di = rdev_get_drvdata(rdev);

        switch (mode) {
        case REGULATOR_MODE_FAST:
                regmap_update_bits(rdev->regmap, di->mode_reg,
                                   di->mode_mask, di->mode_mask);
                break;
        case REGULATOR_MODE_NORMAL:
                regmap_update_bits(rdev->regmap, di->vol_reg, di->mode_mask, 0);
                break;
        default:
                return -EINVAL;
        }
        return 0;
}

static unsigned int fan53555_get_mode(struct regulator_dev *rdev)
{
        struct fan53555_device_info *di = rdev_get_drvdata(rdev);
        unsigned int val;
        int ret = 0;

        ret = regmap_read(rdev->regmap, di->mode_reg, &val);
        if (ret < 0)
                return ret;
        if (val & di->mode_mask)
                return REGULATOR_MODE_FAST;
        else
                return REGULATOR_MODE_NORMAL;
}

static const unsigned int slew_rates[] = {
        64000,
        32000,
        16000,
         8000,
         4000,
         2000,
         1000,
          500,
};

static const unsigned int tcs_slew_rates[] = {
        18700,
         9300,
         4600,
         2300,
};

static const struct regulator_ops fan53555_regulator_ops = {
        .set_voltage_sel = regulator_set_voltage_sel_regmap,
        .get_voltage_sel = regulator_get_voltage_sel_regmap,
        .set_voltage_time_sel = regulator_set_voltage_time_sel,
        .map_voltage = regulator_map_voltage_linear,
        .list_voltage = regulator_list_voltage_linear,
        .set_suspend_voltage = fan53555_set_suspend_voltage,
        .enable = regulator_enable_regmap,
        .disable = regulator_disable_regmap,
        .is_enabled = regulator_is_enabled_regmap,
        .set_mode = fan53555_set_mode,
        .get_mode = fan53555_get_mode,
        .set_ramp_delay = regulator_set_ramp_delay_regmap,
        .set_suspend_enable = fan53555_set_suspend_enable,
        .set_suspend_disable = fan53555_set_suspend_disable,
};

static int fan53526_voltages_setup_fairchild(struct fan53555_device_info *di)
{
        /* Init voltage range and step */
        switch (di->chip_id) {
        case FAN53526_CHIP_ID_01:
                switch (di->chip_rev) {
                case FAN53526_CHIP_REV_08:
                        di->vsel_min = 600000;
                        di->vsel_step = 6250;
                        break;
                default:
                        dev_err(di->dev,
                                "Chip ID %d with rev %d not supported!\n",
                                di->chip_id, di->chip_rev);
                        return -EINVAL;
                }
                break;
        default:
                dev_err(di->dev,
                        "Chip ID %d not supported!\n", di->chip_id);
                return -EINVAL;
        }

        di->slew_reg = FAN53555_CONTROL;
        di->slew_mask = CTL_SLEW_MASK;
        di->ramp_delay_table = slew_rates;
        di->n_ramp_values = ARRAY_SIZE(slew_rates);
        di->enable_time = 250;
        di->vsel_count = FAN53526_NVOLTAGES;

        return 0;
}

static int fan53555_voltages_setup_fairchild(struct fan53555_device_info *di)
{
        /* Init voltage range and step */
        switch (di->chip_id) {
        case FAN53555_CHIP_ID_00:
                switch (di->chip_rev) {
                case FAN53555_CHIP_REV_00:
                        di->vsel_min = 600000;
                        di->vsel_step = 10000;
                        di->enable_time = 400;
                        break;
                case FAN53555_CHIP_REV_13:
                        di->vsel_min = 800000;
                        di->vsel_step = 10000;
                        di->enable_time = 400;
                        break;
                default:
                        dev_err(di->dev,
                                "Chip ID %d with rev %d not supported!\n",
                                di->chip_id, di->chip_rev);
                        return -EINVAL;
                }
                break;
        case FAN53555_CHIP_ID_01:
        case FAN53555_CHIP_ID_03:
        case FAN53555_CHIP_ID_05:
                di->vsel_min = 600000;
                di->vsel_step = 10000;
                di->enable_time = 400;
                break;
        case FAN53555_CHIP_ID_08:
                di->vsel_min = 600000;
                di->vsel_step = 10000;
                di->enable_time = 175;
                break;
        case FAN53555_CHIP_ID_04:
                di->vsel_min = 603000;
                di->vsel_step = 12826;
                di->enable_time = 400;
                break;
        default:
                dev_err(di->dev,
                        "Chip ID %d not supported!\n", di->chip_id);
                return -EINVAL;
        }
        di->slew_reg = FAN53555_CONTROL;
        di->slew_mask = CTL_SLEW_MASK;
        di->ramp_delay_table = slew_rates;
        di->n_ramp_values = ARRAY_SIZE(slew_rates);
        di->vsel_count = FAN53555_NVOLTAGES;

        return 0;
}

static int fan53555_voltages_setup_rockchip(struct fan53555_device_info *di)
{
        /* Init voltage range and step */
        switch (di->chip_id) {
        case RK8600_CHIP_ID_08:
                di->vsel_min = 712500;
                di->vsel_step = 12500;
                break;
        default:
                dev_err(di->dev,
                        "Chip ID %d not supported!\n", di->chip_id);
                return -EINVAL;
        }
        di->slew_reg = FAN53555_CONTROL;
        di->slew_mask = CTL_SLEW_MASK;
        di->ramp_delay_table = slew_rates;
        di->n_ramp_values = ARRAY_SIZE(slew_rates);
        di->enable_time = 360;
        di->vsel_count = FAN53555_NVOLTAGES;

        return 0;
}

static int rk8602_voltages_setup_rockchip(struct fan53555_device_info *di)
{
        /* Init voltage range and step */
        switch (di->chip_id) {
        case RK8602_CHIP_ID_10:
                di->vsel_min = 500000;
                di->vsel_step = 6250;
                break;
        default:
                dev_err(di->dev,
                        "Chip ID %d not supported!\n", di->chip_id);
                return -EINVAL;
        }
        di->slew_reg = FAN53555_CONTROL;
        di->slew_mask = CTL_SLEW_MASK;
        di->ramp_delay_table = slew_rates;
        di->n_ramp_values = ARRAY_SIZE(slew_rates);
        di->enable_time = 360;
        di->vsel_count = RK8602_NVOLTAGES;

        return 0;
}

static int fan53555_voltages_setup_silergy(struct fan53555_device_info *di)
{
        /* Init voltage range and step */
        switch (di->chip_id) {
        case SILERGY_SYR82X:
        case SILERGY_SYR83X:
                di->vsel_min = 712500;
                di->vsel_step = 12500;
                break;
        default:
                dev_err(di->dev,
                        "Chip ID %d not supported!\n", di->chip_id);
                return -EINVAL;
        }
        di->slew_reg = FAN53555_CONTROL;
        di->slew_mask = CTL_SLEW_MASK;
        di->ramp_delay_table = slew_rates;
        di->n_ramp_values = ARRAY_SIZE(slew_rates);
        di->enable_time = 400;
        di->vsel_count = FAN53555_NVOLTAGES;

        return 0;
}

static int fan53526_voltages_setup_tcs(struct fan53555_device_info *di)
{
        switch (di->chip_id) {
        case TCS4525_CHIP_ID_12:
        case TCS4526_CHIP_ID_00:
                di->slew_reg = TCS4525_TIME;
                di->slew_mask = TCS_SLEW_MASK;
                di->ramp_delay_table = tcs_slew_rates;
                di->n_ramp_values = ARRAY_SIZE(tcs_slew_rates);

                /* Init voltage range and step */
                di->vsel_min = 600000;
                di->vsel_step = 6250;
                di->vsel_count = FAN53526_NVOLTAGES;
                break;
        default:
                dev_err(di->dev, "Chip ID %d not supported!\n", di->chip_id);
                return -EINVAL;
        }

        return 0;
}

/* For 00,01,03,05 options:
 * VOUT = 0.60V + NSELx * 10mV, from 0.60 to 1.23V.
 * For 04 option:
 * VOUT = 0.603V + NSELx * 12.826mV, from 0.603 to 1.411V.
 * */
static int fan53555_device_setup(struct fan53555_device_info *di,
                                struct fan53555_platform_data *pdata)
{
        int ret = 0;

        /* Setup voltage control register */
        switch (di->vendor) {
        case FAN53526_VENDOR_FAIRCHILD:
        case FAN53555_VENDOR_FAIRCHILD:
        case FAN53555_VENDOR_ROCKCHIP:
        case FAN53555_VENDOR_SILERGY:
                switch (pdata->sleep_vsel_id) {
                case FAN53555_VSEL_ID_0:
                        di->sleep_reg = FAN53555_VSEL0;
                        di->vol_reg = FAN53555_VSEL1;
                        break;
                case FAN53555_VSEL_ID_1:
                        di->sleep_reg = FAN53555_VSEL1;
                        di->vol_reg = FAN53555_VSEL0;
                        break;
                default:
                        dev_err(di->dev, "Invalid VSEL ID!\n");
                        return -EINVAL;
                }
                di->sleep_en_reg = di->sleep_reg;
                di->en_reg = di->vol_reg;
                break;
        case RK8602_VENDOR_ROCKCHIP:
                switch (pdata->sleep_vsel_id) {
                case FAN53555_VSEL_ID_0:
                        di->sleep_reg = RK8602_VSEL0;
                        di->vol_reg = RK8602_VSEL1;
                        di->sleep_en_reg = FAN53555_VSEL0;
                        di->en_reg = FAN53555_VSEL1;
                        break;
                case FAN53555_VSEL_ID_1:
                        di->sleep_reg = RK8602_VSEL1;
                        di->vol_reg = RK8602_VSEL0;
                        di->sleep_en_reg = FAN53555_VSEL1;
                        di->en_reg = FAN53555_VSEL0;
                        break;
                default:
                        dev_err(di->dev, "Invalid VSEL ID!\n");
                        return -EINVAL;
                }
                break;
        case FAN53526_VENDOR_TCS:
                switch (pdata->sleep_vsel_id) {
                case FAN53555_VSEL_ID_0:
                        di->sleep_reg = TCS4525_VSEL0;
                        di->vol_reg = TCS4525_VSEL1;
                        break;
                case FAN53555_VSEL_ID_1:
                        di->sleep_reg = TCS4525_VSEL1;
                        di->vol_reg = TCS4525_VSEL0;
                        break;
                default:
                        dev_err(di->dev, "Invalid VSEL ID!\n");
                        return -EINVAL;
                }
                di->sleep_en_reg = di->sleep_reg;
                di->en_reg = di->vol_reg;
                break;
        default:
                dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
                return -EINVAL;
        }

        /* Setup mode control register */
        switch (di->vendor) {
        case FAN53526_VENDOR_FAIRCHILD:
                di->mode_reg = FAN53555_CONTROL;

                switch (pdata->sleep_vsel_id) {
                case FAN53555_VSEL_ID_0:
                        di->mode_mask = CTL_MODE_VSEL1_MODE;
                        break;
                case FAN53555_VSEL_ID_1:
                        di->mode_mask = CTL_MODE_VSEL0_MODE;
                        break;
                }
                break;
        case FAN53555_VENDOR_FAIRCHILD:
        case FAN53555_VENDOR_ROCKCHIP:
        case FAN53555_VENDOR_SILERGY:
                di->mode_reg = di->vol_reg;
                di->mode_mask = VSEL_MODE;
                break;
        case RK8602_VENDOR_ROCKCHIP:
                di->mode_mask = VSEL_MODE;

                switch (pdata->sleep_vsel_id) {
                case FAN53555_VSEL_ID_0:
                        di->mode_reg = FAN53555_VSEL1;
                        break;
                case FAN53555_VSEL_ID_1:
                        di->mode_reg = FAN53555_VSEL0;
                        break;
                }
                break;
        case FAN53526_VENDOR_TCS:
                di->mode_reg = TCS4525_COMMAND;

                switch (pdata->sleep_vsel_id) {
                case FAN53555_VSEL_ID_0:
                        di->mode_mask = TCS_VSEL1_MODE;
                        break;
                case FAN53555_VSEL_ID_1:
                        di->mode_mask = TCS_VSEL0_MODE;
                        break;
                }
                break;
        default:
                dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
                return -EINVAL;
        }

        /* Setup voltage range */
        switch (di->vendor) {
        case FAN53526_VENDOR_FAIRCHILD:
                ret = fan53526_voltages_setup_fairchild(di);
                break;
        case FAN53555_VENDOR_FAIRCHILD:
                ret = fan53555_voltages_setup_fairchild(di);
                break;
        case FAN53555_VENDOR_ROCKCHIP:
                ret = fan53555_voltages_setup_rockchip(di);
                break;
        case RK8602_VENDOR_ROCKCHIP:
                ret = rk8602_voltages_setup_rockchip(di);
                break;
        case FAN53555_VENDOR_SILERGY:
                ret = fan53555_voltages_setup_silergy(di);
                break;
        case FAN53526_VENDOR_TCS:
                ret = fan53526_voltages_setup_tcs(di);
                break;
        default:
                dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
                return -EINVAL;
        }

        return ret;
}

static int fan53555_regulator_register(struct fan53555_device_info *di,
                        struct regulator_config *config)
{
        struct regulator_desc *rdesc = &di->desc;
        struct regulator_dev *rdev;

        rdesc->name = "fan53555-reg";
        rdesc->supply_name = "vin";
        rdesc->ops = &fan53555_regulator_ops;
        rdesc->type = REGULATOR_VOLTAGE;
        rdesc->n_voltages = di->vsel_count;
        rdesc->enable_reg = di->en_reg;
        rdesc->enable_mask = VSEL_BUCK_EN;
        rdesc->min_uV = di->vsel_min;
        rdesc->uV_step = di->vsel_step;
        rdesc->vsel_reg = di->vol_reg;
        rdesc->vsel_mask = BIT(fls(di->vsel_count - 1)) - 1;
        rdesc->ramp_reg = di->slew_reg;
        rdesc->ramp_mask = di->slew_mask;
        rdesc->ramp_delay_table = di->ramp_delay_table;
        rdesc->n_ramp_values = di->n_ramp_values;
        rdesc->enable_time = di->enable_time;
        rdesc->owner = THIS_MODULE;

        rdev = devm_regulator_register(di->dev, &di->desc, config);
        return PTR_ERR_OR_ZERO(rdev);
}

static const struct regmap_config fan53555_regmap_config = {
        .reg_bits = 8,
        .val_bits = 8,
};

static struct fan53555_platform_data *fan53555_parse_dt(struct device *dev,
                                              struct device_node *np,
                                              const struct regulator_desc *desc)
{
        struct fan53555_platform_data *pdata;
        int ret;
        u32 tmp;

        pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
        if (!pdata)
                return NULL;

        pdata->regulator = of_get_regulator_init_data(dev, np, desc);

        ret = of_property_read_u32(np, "fcs,suspend-voltage-selector",
                                   &tmp);
        if (!ret)
                pdata->sleep_vsel_id = tmp;

        return pdata;
}

static const struct of_device_id __maybe_unused fan53555_dt_ids[] = {
        {
                .compatible = "fcs,fan53526",
                .data = (void *)FAN53526_VENDOR_FAIRCHILD,
        }, {
                .compatible = "fcs,fan53555",
                .data = (void *)FAN53555_VENDOR_FAIRCHILD
        }, {
                .compatible = "rockchip,rk8600",
                .data = (void *)FAN53555_VENDOR_ROCKCHIP
        }, {
                .compatible = "rockchip,rk8602",
                .data = (void *)RK8602_VENDOR_ROCKCHIP
        }, {
                .compatible = "silergy,syr827",
                .data = (void *)FAN53555_VENDOR_SILERGY,
        }, {
                .compatible = "silergy,syr828",
                .data = (void *)FAN53555_VENDOR_SILERGY,
        }, {
                .compatible = "tcs,tcs4525",
                .data = (void *)FAN53526_VENDOR_TCS
        }, {
                .compatible = "tcs,tcs4526",
                .data = (void *)FAN53526_VENDOR_TCS
        },
        { }
};
MODULE_DEVICE_TABLE(of, fan53555_dt_ids);

static int fan53555_regulator_probe(struct i2c_client *client)
{
        struct device_node *np = client->dev.of_node;
        struct fan53555_device_info *di;
        struct fan53555_platform_data *pdata;
        struct regulator_config config = { };
        struct regmap *regmap;
        unsigned int val;
        int ret;

        di = devm_kzalloc(&client->dev, sizeof(struct fan53555_device_info),
                                        GFP_KERNEL);
        if (!di)
                return -ENOMEM;

        pdata = dev_get_platdata(&client->dev);
        if (!pdata)
                pdata = fan53555_parse_dt(&client->dev, np, &di->desc);

        if (!pdata || !pdata->regulator)
                return dev_err_probe(&client->dev, -ENODEV,
                                     "Platform data not found!\n");

        di->regulator = pdata->regulator;
        di->vendor = (uintptr_t)i2c_get_match_data(client);
        if (!dev_fwnode(&client->dev)) {
                /* if no ramp constraint set, get the pdata ramp_delay */
                if (!di->regulator->constraints.ramp_delay) {
                        if (pdata->slew_rate >= ARRAY_SIZE(slew_rates))
                                return dev_err_probe(&client->dev, -EINVAL,
                                                     "Invalid slew_rate\n");

                        di->regulator->constraints.ramp_delay
                                        = slew_rates[pdata->slew_rate];
                }
        }

        regmap = devm_regmap_init_i2c(client, &fan53555_regmap_config);
        if (IS_ERR(regmap))
                return dev_err_probe(&client->dev, PTR_ERR(regmap),
                                     "Failed to allocate regmap!\n");

        di->dev = &client->dev;
        i2c_set_clientdata(client, di);
        /* Get chip ID */
        ret = regmap_read(regmap, FAN53555_ID1, &val);
        if (ret < 0)
                return dev_err_probe(&client->dev, ret, "Failed to get chip ID!\n");

        di->chip_id = val & DIE_ID;
        /* Get chip revision */
        ret = regmap_read(regmap, FAN53555_ID2, &val);
        if (ret < 0)
                return dev_err_probe(&client->dev, ret, "Failed to get chip Rev!\n");

        di->chip_rev = val & DIE_REV;
        dev_info(&client->dev, "FAN53555 Option[%d] Rev[%d] Detected!\n",
                                di->chip_id, di->chip_rev);
        /* Device init */
        ret = fan53555_device_setup(di, pdata);
        if (ret < 0)
                return dev_err_probe(&client->dev, ret, "Failed to setup device!\n");

        /* Register regulator */
        config.dev = di->dev;
        config.init_data = di->regulator;
        config.regmap = regmap;
        config.driver_data = di;
        config.of_node = np;

        ret = fan53555_regulator_register(di, &config);
        if (ret < 0)
                dev_err_probe(&client->dev, ret, "Failed to register regulator!\n");

        return ret;
}

static const struct i2c_device_id fan53555_id[] = {
        {
                .name = "fan53526",
                .driver_data = FAN53526_VENDOR_FAIRCHILD
        }, {
                .name = "fan53555",
                .driver_data = FAN53555_VENDOR_FAIRCHILD
        }, {
                .name = "rk8600",
                .driver_data = FAN53555_VENDOR_ROCKCHIP
        }, {
                .name = "rk8602",
                .driver_data = RK8602_VENDOR_ROCKCHIP
        }, {
                .name = "syr827",
                .driver_data = FAN53555_VENDOR_SILERGY
        }, {
                .name = "syr828",
                .driver_data = FAN53555_VENDOR_SILERGY
        }, {
                .name = "tcs4525",
                .driver_data = FAN53526_VENDOR_TCS
        }, {
                .name = "tcs4526",
                .driver_data = FAN53526_VENDOR_TCS
        },
        { },
};
MODULE_DEVICE_TABLE(i2c, fan53555_id);

static struct i2c_driver fan53555_regulator_driver = {
        .driver = {
                .name = "fan53555-regulator",
                .probe_type = PROBE_PREFER_ASYNCHRONOUS,
                .of_match_table = of_match_ptr(fan53555_dt_ids),
        },
        .probe = fan53555_regulator_probe,
        .id_table = fan53555_id,
};

module_i2c_driver(fan53555_regulator_driver);

MODULE_AUTHOR("Yunfan Zhang <yfzhang@marvell.com>");
MODULE_DESCRIPTION("FAN53555 regulator driver");
MODULE_LICENSE("GPL v2");