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
  23 static 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
  87 static 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
  96 static 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 };
 105 MODULE_DEVICE_TABLE(i2c, arizona_i2c_id);
 106
 107 static 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
 118 module_i2c_driver(arizona_i2c_driver);
 119
 120 MODULE_SOFTDEP("pre: arizona_ldo1");
 121 MODULE_DESCRIPTION("Arizona I2C bus interface");
 122 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 123 MODULE_LICENSE("GPL");