linux/drivers/mfd/arizona-i2c.c
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   1/*
   2 * Arizona-i2c.c  --  Arizona I2C bus interface
   3 *
   4 * Copyright 2012 Wolfson Microelectronics plc
   5 *
   6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License version 2 as
  10 * published by the Free Software Foundation.
  11 */
  12
  13#include <linux/err.h>
  14#include <linux/i2c.h>
  15#include <linux/module.h>
  16#include <linux/pm_runtime.h>
  17#include <linux/regmap.h>
  18#include <linux/regulator/consumer.h>
  19#include <linux/slab.h>
  20
  21#include <linux/mfd/arizona/core.h>
  22
  23#include "arizona.h"
  24
  25static int arizona_i2c_probe(struct i2c_client *i2c,
  26                                          const struct i2c_device_id *id)
  27{
  28        struct arizona *arizona;
  29        const struct regmap_config *regmap_config;
  30        int ret;
  31
  32        switch (id->driver_data) {
  33#ifdef CONFIG_MFD_WM5102
  34        case WM5102:
  35                regmap_config = &wm5102_i2c_regmap;
  36                break;
  37#endif
  38#ifdef CONFIG_MFD_WM5110
  39        case WM5110:
  40                regmap_config = &wm5110_i2c_regmap;
  41                break;
  42#endif
  43        default:
  44                dev_err(&i2c->dev, "Unknown device type %ld\n",
  45                        id->driver_data);
  46                return -EINVAL;
  47        }
  48
  49        arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL);
  50        if (arizona == NULL)
  51                return -ENOMEM;
  52
  53        arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config);
  54        if (IS_ERR(arizona->regmap)) {
  55                ret = PTR_ERR(arizona->regmap);
  56                dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
  57                        ret);
  58                return ret;
  59        }
  60
  61        arizona->type = id->driver_data;
  62        arizona->dev = &i2c->dev;
  63        arizona->irq = i2c->irq;
  64
  65        return arizona_dev_init(arizona);
  66}
  67
  68static int arizona_i2c_remove(struct i2c_client *i2c)
  69{
  70        struct arizona *arizona = dev_get_drvdata(&i2c->dev);
  71        arizona_dev_exit(arizona);
  72        return 0;
  73}
  74
  75static const struct i2c_device_id arizona_i2c_id[] = {
  76        { "wm5102", WM5102 },
  77        { "wm5110", WM5110 },
  78        { }
  79};
  80MODULE_DEVICE_TABLE(i2c, arizona_i2c_id);
  81
  82static struct i2c_driver arizona_i2c_driver = {
  83        .driver = {
  84                .name   = "arizona",
  85                .owner  = THIS_MODULE,
  86                .pm     = &arizona_pm_ops,
  87        },
  88        .probe          = arizona_i2c_probe,
  89        .remove         = arizona_i2c_remove,
  90        .id_table       = arizona_i2c_id,
  91};
  92
  93module_i2c_driver(arizona_i2c_driver);
  94
  95MODULE_DESCRIPTION("Arizona I2C bus interface");
  96MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
  97MODULE_LICENSE("GPL");
  98
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