arizona-spi.c

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/*
 * arizona-spi.c  --  Arizona SPI bus interface
 *
 * Copyright 2012 Wolfson Microelectronics plc
 *
 * Author: Mark Brown <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/err.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>

#include <linux/mfd/arizona/core.h>

#include "arizona.h"

static int __devinit arizona_spi_probe(struct spi_device *spi)
{
    const struct spi_device_id *id = spi_get_device_id(spi);
    struct arizona *arizona;
    const struct regmap_config *regmap_config;
    int ret;

    switch (id->driver_data) {
#ifdef CONFIG_MFD_WM5102
    case WM5102:
        regmap_config = &wm5102_spi_regmap;
        break;
#endif
#ifdef CONFIG_MFD_WM5110
    case WM5110:
        regmap_config = &wm5110_spi_regmap;
        break;
#endif
    default:
        dev_err(&spi->dev, "Unknown device type %ld\n",
            id->driver_data);
        return -EINVAL;
    }

    arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
    if (arizona == NULL)
        return -ENOMEM;

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

    arizona->type = id->driver_data;
    arizona->dev = &spi->dev;
    arizona->irq = spi->irq;

    return arizona_dev_init(arizona);
}

static int __devexit arizona_spi_remove(struct spi_device *spi)
{
    struct arizona *arizona = dev_get_drvdata(&spi->dev);
    arizona_dev_exit(arizona);
    return 0;
}

static const struct spi_device_id arizona_spi_ids[] = {
    { "wm5102", WM5102 },
    { "wm5110", WM5110 },
    { },
};
MODULE_DEVICE_TABLE(spi, arizona_spi_ids);

static struct spi_driver arizona_spi_driver = {
    .driver = {
        .name   = "arizona",
        .owner  = THIS_MODULE,
        .pm = &arizona_pm_ops,
    },
    .probe      = arizona_spi_probe,
    .remove     = __devexit_p(arizona_spi_remove),
    .id_table   = arizona_spi_ids,
};

module_spi_driver(arizona_spi_driver);

MODULE_DESCRIPTION("Arizona SPI bus interface");
MODULE_AUTHOR("Mark Brown <[email protected]>");
MODULE_LICENSE("GPL");