// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * SPI access for Dialog DA9052 PMICs.
 *
 * Copyright(c) 2011 Dialog Semiconductor Ltd.
 *
 * Author: David Dajun Chen <dchen@diasemi.com>
 */

#include <linux/device.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/mfd/core.h>
#include <linux/spi/spi.h>
#include <linux/err.h>

#include <linux/mfd/da9052/da9052.h>

static int da9052_spi_probe(struct spi_device *spi)
{
        struct regmap_config config;
        int ret;
        const struct spi_device_id *id = spi_get_device_id(spi);
        struct da9052 *da9052;

        da9052 = devm_kzalloc(&spi->dev, sizeof(struct da9052), GFP_KERNEL);
        if (!da9052)
                return -ENOMEM;

        spi->mode = SPI_MODE_0;
        spi->bits_per_word = 8;
        spi_setup(spi);

        da9052->dev = &spi->dev;
        da9052->chip_irq = spi->irq;

        spi_set_drvdata(spi, da9052);

        config = da9052_regmap_config;
        config.read_flag_mask = 1;
        config.reg_bits = 7;
        config.pad_bits = 1;
        config.val_bits = 8;
        config.use_single_read = true;
        config.use_single_write = true;

        da9052->regmap = devm_regmap_init_spi(spi, &config);
        if (IS_ERR(da9052->regmap)) {
                ret = PTR_ERR(da9052->regmap);
                dev_err(&spi->dev, "Failed to allocate register map: %d\n",
                        ret);
                return ret;
        }

        return da9052_device_init(da9052, id->driver_data);
}

static void da9052_spi_remove(struct spi_device *spi)
{
        struct da9052 *da9052 = spi_get_drvdata(spi);

        da9052_device_exit(da9052);
}

static const struct spi_device_id da9052_spi_id[] = {
        {"da9052", DA9052},
        {"da9053-aa", DA9053_AA},
        {"da9053-ba", DA9053_BA},
        {"da9053-bb", DA9053_BB},
        {"da9053-bc", DA9053_BC},
        {}
};

static struct spi_driver da9052_spi_driver = {
        .probe = da9052_spi_probe,
        .remove = da9052_spi_remove,
        .id_table = da9052_spi_id,
        .driver = {
                .name = "da9052",
        },
};

static int __init da9052_spi_init(void)
{
        int ret;

        ret = spi_register_driver(&da9052_spi_driver);
        if (ret != 0) {
                pr_err("Failed to register DA9052 SPI driver, %d\n", ret);
                return ret;
        }

        return 0;
}
subsys_initcall(da9052_spi_init);

static void __exit da9052_spi_exit(void)
{
        spi_unregister_driver(&da9052_spi_driver);
}
module_exit(da9052_spi_exit);

MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC");