LXR linux/drivers/mfd/arizona-i2c.c

   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#include <linux/of.h>
  21
  22#include <linux/mfd/arizona/core.h>
  23
  24#include "arizona.h"
  25
  26static int arizona_i2c_probe(struct i2c_client *i2c,
  27                             const struct i2c_device_id *id)
  28{
  29        struct arizona *arizona;
  30        const struct regmap_config *regmap_config = NULL;
  31        unsigned long type;
  32        int ret;
  33
  34        if (i2c->dev.of_node)
  35                type = arizona_of_get_type(&i2c->dev);
  36        else
  37                type = id->driver_data;
  38
  39        switch (type) {
  40        case WM5102:
  41                if (IS_ENABLED(CONFIG_MFD_WM5102))
  42                        regmap_config = &wm5102_i2c_regmap;
  43                break;
  44        case WM5110:
  45        case WM8280:
  46                if (IS_ENABLED(CONFIG_MFD_WM5110))
  47                        regmap_config = &wm5110_i2c_regmap;
  48                break;
  49        case WM8997:
  50                if (IS_ENABLED(CONFIG_MFD_WM8997))
  51                        regmap_config = &wm8997_i2c_regmap;
  52                break;
  53        case WM8998:
  54        case WM1814:
  55                if (IS_ENABLED(CONFIG_MFD_WM8998))
  56                        regmap_config = &wm8998_i2c_regmap;
  57                break;
  58        default:
  59                dev_err(&i2c->dev, "Unknown device type %ld\n", type);
  60                return -EINVAL;
  61        }
  62
  63        if (!regmap_config) {
  64                dev_err(&i2c->dev,
  65                        "No kernel support for device type %ld\n", type);
  66                return -EINVAL;
  67        }
  68
  69        arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL);
  70        if (arizona == NULL)
  71                return -ENOMEM;
  72
  73        arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config);
  74        if (IS_ERR(arizona->regmap)) {
  75                ret = PTR_ERR(arizona->regmap);
  76                dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
  77                        ret);
  78                return ret;
  79        }
  80
  81        arizona->type = type;
  82        arizona->dev = &i2c->dev;
  83        arizona->irq = i2c->irq;
  84
  85        return arizona_dev_init(arizona);
  86}
  87
  88static int arizona_i2c_remove(struct i2c_client *i2c)
  89{
  90        struct arizona *arizona = dev_get_drvdata(&i2c->dev);
  91
  92        arizona_dev_exit(arizona);
  93
  94        return 0;
  95}
  96
  97static const struct i2c_device_id arizona_i2c_id[] = {
  98        { "wm5102", WM5102 },
  99        { "wm5110", WM5110 },
 100        { "wm8280", WM8280 },
 101        { "wm8997", WM8997 },
 102        { "wm8998", WM8998 },
 103        { "wm1814", WM1814 },
 104        { }
 105};
 106MODULE_DEVICE_TABLE(i2c, arizona_i2c_id);
 107
 108static struct i2c_driver arizona_i2c_driver = {
 109        .driver = {
 110                .name   = "arizona",
 111                .pm     = &arizona_pm_ops,
 112                .of_match_table = of_match_ptr(arizona_of_match),
 113        },
 114        .probe          = arizona_i2c_probe,
 115        .remove         = arizona_i2c_remove,
 116        .id_table       = arizona_i2c_id,
 117};
 118
 119module_i2c_driver(arizona_i2c_driver);
 120
 121MODULE_DESCRIPTION("Arizona I2C bus interface");
 122MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 123MODULE_LICENSE("GPL");
 124