da9052-spi.c

Go to the documentation of this file.

/*
 * SPI access for Dialog DA9052 PMICs.
 *
 * Copyright(c) 2011 Dialog Semiconductor Ltd.
 *
 * Author: David Dajun Chen <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 */

#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 __devinit da9052_spi_probe(struct spi_device *spi)
{
    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_CPOL;
    spi->bits_per_word = 8;
    spi_setup(spi);

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

    dev_set_drvdata(&spi->dev, da9052);

    da9052_regmap_config.read_flag_mask = 1;
    da9052_regmap_config.write_flag_mask = 0;

    da9052->regmap = devm_regmap_init_spi(spi, &da9052_regmap_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;
    }

    ret = da9052_device_init(da9052, id->driver_data);
    if (ret != 0)
        return ret;

    return 0;
}

static int __devexit da9052_spi_remove(struct spi_device *spi)
{
    struct da9052 *da9052 = dev_get_drvdata(&spi->dev);

    da9052_device_exit(da9052);
    return 0;
}

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

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

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 <[email protected]>");
MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC");
MODULE_LICENSE("GPL");