// SPDX-License-Identifier: GPL-2.0
/*
 * CS42L43 I2C driver
 *
 * Copyright (C) 2022-2023 Cirrus Logic, Inc. and
 *                         Cirrus Logic International Semiconductor Ltd.
 */

#include <linux/array_size.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/mfd/cs42l43.h>
#include <linux/mfd/cs42l43-regs.h>
#include <linux/module.h>
#include <linux/pm.h>
#include <linux/regmap.h>

#include "cs42l43.h"

static const struct regmap_config cs42l43_i2c_regmap = {
        .reg_bits               = 32,
        .reg_stride             = 4,
        .val_bits               = 32,
        .reg_format_endian      = REGMAP_ENDIAN_BIG,
        .val_format_endian      = REGMAP_ENDIAN_BIG,

        .max_register           = CS42L43_MCU_RAM_MAX,
        .readable_reg           = cs42l43_readable_register,
        .volatile_reg           = cs42l43_volatile_register,
        .precious_reg           = cs42l43_precious_register,

        .cache_type             = REGCACHE_MAPLE,
        .reg_defaults           = cs42l43_reg_default,
        .num_reg_defaults       = ARRAY_SIZE(cs42l43_reg_default),
};

static int cs42l43_i2c_probe(struct i2c_client *i2c)
{
        struct cs42l43 *cs42l43;

        cs42l43 = devm_kzalloc(&i2c->dev, sizeof(*cs42l43), GFP_KERNEL);
        if (!cs42l43)
                return -ENOMEM;

        cs42l43->dev = &i2c->dev;
        cs42l43->irq = i2c->irq;
        /* A device on an I2C is always attached by definition. */
        cs42l43->attached = true;
        cs42l43->variant_id = (long)device_get_match_data(cs42l43->dev);

        cs42l43->regmap = devm_regmap_init_i2c(i2c, &cs42l43_i2c_regmap);
        if (IS_ERR(cs42l43->regmap))
                return dev_err_probe(cs42l43->dev, PTR_ERR(cs42l43->regmap),
                                     "Failed to allocate regmap\n");

        return cs42l43_dev_probe(cs42l43);
}

#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id cs42l43_of_match[] = {
        { .compatible = "cirrus,cs42l43", .data = (void *)CS42L43_DEVID_VAL },
        { .compatible = "cirrus,cs42l43b", .data = (void *)CS42L43B_DEVID_VAL },
        {}
};
MODULE_DEVICE_TABLE(of, cs42l43_of_match);
#endif

#if IS_ENABLED(CONFIG_ACPI)
static const struct acpi_device_id cs42l43_acpi_match[] = {
        { "CSC4243", CS42L43_DEVID_VAL },
        { "CSC2A3B", CS42L43B_DEVID_VAL },
        {}
};
MODULE_DEVICE_TABLE(acpi, cs42l43_acpi_match);
#endif

static struct i2c_driver cs42l43_i2c_driver = {
        .driver = {
                .name                   = "cs42l43",
                .pm                     = pm_ptr(&cs42l43_pm_ops),
                .of_match_table         = of_match_ptr(cs42l43_of_match),
                .acpi_match_table       = ACPI_PTR(cs42l43_acpi_match),
        },

        .probe          = cs42l43_i2c_probe,
};
module_i2c_driver(cs42l43_i2c_driver);

MODULE_IMPORT_NS("MFD_CS42L43");

MODULE_DESCRIPTION("CS42L43 I2C Driver");
MODULE_AUTHOR("Charles Keepax <ckeepax@opensource.cirrus.com>");
MODULE_LICENSE("GPL");