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