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

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Arizona-i2c.c  --  Arizona I2C bus interface
   4 *
   5 * Copyright 2012 Wolfson Microelectronics plc
   6 *
   7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   8 */
   9
  10#include <linux/err.h>
  11#include <linux/i2c.h>
  12#include <linux/module.h>
  13#include <linux/pm_runtime.h>
  14#include <linux/regmap.h>
  15#include <linux/regulator/consumer.h>
  16#include <linux/slab.h>
  17#include <linux/of.h>
  18
  19#include <linux/mfd/arizona/core.h>
  20
  21#include "arizona.h"
  22
  23static int arizona_i2c_probe(struct i2c_client *i2c,
  24                             const struct i2c_device_id *id)
  25{
  26        const void *match_data;
  27        struct arizona *arizona;
  28        const struct regmap_config *regmap_config = NULL;
  29        unsigned long type = 0;
  30        int ret;
  31
  32        match_data = device_get_match_data(&i2c->dev);
  33        if (match_data)
  34                type = (unsigned long)match_data;
  35        else if (id)
  36                type = id->driver_data;
  37
  38        switch (type) {
  39        case WM5102:
  40                if (IS_ENABLED(CONFIG_MFD_WM5102))
  41                        regmap_config = &wm5102_i2c_regmap;
  42                break;
  43        case WM5110:
  44        case WM8280:
  45                if (IS_ENABLED(CONFIG_MFD_WM5110))
  46                        regmap_config = &wm5110_i2c_regmap;
  47                break;
  48        case WM8997:
  49                if (IS_ENABLED(CONFIG_MFD_WM8997))
  50                        regmap_config = &wm8997_i2c_regmap;
  51                break;
  52        case WM8998:
  53        case WM1814:
  54                if (IS_ENABLED(CONFIG_MFD_WM8998))
  55                        regmap_config = &wm8998_i2c_regmap;
  56                break;
  57        default:
  58                dev_err(&i2c->dev, "Unknown device type %ld\n", type);
  59                return -EINVAL;
  60        }
  61
  62        if (!regmap_config) {
  63                dev_err(&i2c->dev,
  64                        "No kernel support for device type %ld\n", type);
  65                return -EINVAL;
  66        }
  67
  68        arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL);
  69        if (arizona == NULL)
  70                return -ENOMEM;
  71
  72        arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config);
  73        if (IS_ERR(arizona->regmap)) {
  74                ret = PTR_ERR(arizona->regmap);
  75                dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
  76                        ret);
  77                return ret;
  78        }
  79
  80        arizona->type = type;
  81        arizona->dev = &i2c->dev;
  82        arizona->irq = i2c->irq;
  83
  84        return arizona_dev_init(arizona);
  85}
  86
  87static int arizona_i2c_remove(struct i2c_client *i2c)
  88{
  89        struct arizona *arizona = dev_get_drvdata(&i2c->dev);
  90
  91        arizona_dev_exit(arizona);
  92
  93        return 0;
  94}
  95
  96static const struct i2c_device_id arizona_i2c_id[] = {
  97        { "wm5102", WM5102 },
  98        { "wm5110", WM5110 },
  99        { "wm8280", WM8280 },
 100        { "wm8997", WM8997 },
 101        { "wm8998", WM8998 },
 102        { "wm1814", WM1814 },
 103        { }
 104};
 105MODULE_DEVICE_TABLE(i2c, arizona_i2c_id);
 106
 107static struct i2c_driver arizona_i2c_driver = {
 108        .driver = {
 109                .name   = "arizona",
 110                .pm     = &arizona_pm_ops,
 111                .of_match_table = of_match_ptr(arizona_of_match),
 112        },
 113        .probe          = arizona_i2c_probe,
 114        .remove         = arizona_i2c_remove,
 115        .id_table       = arizona_i2c_id,
 116};
 117
 118module_i2c_driver(arizona_i2c_driver);
 119
 120MODULE_SOFTDEP("pre: arizona_ldo1");
 121MODULE_DESCRIPTION("Arizona I2C bus interface");
 122MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 123MODULE_LICENSE("GPL");
 124