// SPDX-License-Identifier: GPL-2.0
/*
 * Device driver for regulators in HISI PMIC IC
 *
 * Copyright (c) 2013 Linaro Ltd.
 * Copyright (c) 2011 Hisilicon.
 * Copyright (c) 2020-2021 Huawei Technologies Co., Ltd.
 */

#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/spmi.h>

static const struct mfd_cell hi6421v600_devs[] = {
        { .name = "hi6421v600-irq", },
        { .name = "hi6421v600-regulator", },
};

static const struct regmap_config regmap_config = {
        .reg_bits       = 16,
        .val_bits       = BITS_PER_BYTE,
        .max_register   = 0xffff,
        .fast_io        = true
};

static int hi6421_spmi_pmic_probe(struct spmi_device *sdev)
{
        struct device *dev = &sdev->dev;
        struct regmap *regmap;
        int ret;

        regmap = devm_regmap_init_spmi_ext(sdev, &regmap_config);
        if (IS_ERR(regmap))
                return PTR_ERR(regmap);

        dev_set_drvdata(&sdev->dev, regmap);

        ret = devm_mfd_add_devices(&sdev->dev, PLATFORM_DEVID_NONE,
                                   hi6421v600_devs, ARRAY_SIZE(hi6421v600_devs),
                                   NULL, 0, NULL);
        if (ret < 0)
                dev_err(dev, "Failed to add child devices: %d\n", ret);

        return ret;
}

static const struct of_device_id pmic_spmi_id_table[] = {
        { .compatible = "hisilicon,hi6421-spmi" },
        { }
};
MODULE_DEVICE_TABLE(of, pmic_spmi_id_table);

static struct spmi_driver hi6421_spmi_pmic_driver = {
        .driver = {
                .name   = "hi6421-spmi-pmic",
                .of_match_table = pmic_spmi_id_table,
        },
        .probe  = hi6421_spmi_pmic_probe,
};
module_spmi_driver(hi6421_spmi_pmic_driver);

MODULE_DESCRIPTION("HiSilicon Hi6421v600 SPMI PMIC driver");
MODULE_LICENSE("GPL v2");