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 {
  25         struct arizona *arizona;
  26         const struct regmap_config *regmap_config = NULL;
  27         unsigned long type;
  28         int ret;
  29
  30         type = (uintptr_t)i2c_get_match_data(i2c);
  31         switch (type) {
  32         case WM5102:
  33                 if (IS_ENABLED(CONFIG_MFD_WM5102))
  34                         regmap_config = &wm5102_i2c_regmap;
  35                 break;
  36         case WM5110:
  37         case WM8280:
  38                 if (IS_ENABLED(CONFIG_MFD_WM5110))
  39                         regmap_config = &wm5110_i2c_regmap;
  40                 break;
  41         case WM8997:
  42                 if (IS_ENABLED(CONFIG_MFD_WM8997))
  43                         regmap_config = &wm8997_i2c_regmap;
  44                 break;
  45         case WM8998:
  46         case WM1814:
  47                 if (IS_ENABLED(CONFIG_MFD_WM8998))
  48                         regmap_config = &wm8998_i2c_regmap;
  49                 break;
  50         default:
  51                 dev_err(&i2c->dev, "Unknown device type %ld\n", type);
  52                 return -EINVAL;
  53         }
  54
  55         if (!regmap_config) {
  56                 dev_err(&i2c->dev,
  57                         "No kernel support for device type %ld\n", type);
  58                 return -EINVAL;
  59         }
  60
  61         arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL);
  62         if (arizona == NULL)
  63                 return -ENOMEM;
  64
  65         arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config);
  66         if (IS_ERR(arizona->regmap)) {
  67                 ret = PTR_ERR(arizona->regmap);
  68                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
  69                         ret);
  70                 return ret;
  71         }
  72
  73         arizona->type = type;
  74         arizona->dev = &i2c->dev;
  75         arizona->irq = i2c->irq;
  76
  77         return arizona_dev_init(arizona);
  78 }
  79
  80 static void arizona_i2c_remove(struct i2c_client *i2c)
  81 {
  82         struct arizona *arizona = dev_get_drvdata(&i2c->dev);
  83
  84         arizona_dev_exit(arizona);
  85 }
  86
  87 static const struct i2c_device_id arizona_i2c_id[] = {
  88         { "wm5102", WM5102 },
  89         { "wm5110", WM5110 },
  90         { "wm8280", WM8280 },
  91         { "wm8997", WM8997 },
  92         { "wm8998", WM8998 },
  93         { "wm1814", WM1814 },
  94         { }
  95 };
  96 MODULE_DEVICE_TABLE(i2c, arizona_i2c_id);
  97
  98 #ifdef CONFIG_OF
  99 static const struct of_device_id arizona_i2c_of_match[] = {
 100         { .compatible = "wlf,wm5102", .data = (void *)WM5102 },
 101         { .compatible = "wlf,wm5110", .data = (void *)WM5110 },
 102         { .compatible = "wlf,wm8280", .data = (void *)WM8280 },
 103         { .compatible = "wlf,wm8997", .data = (void *)WM8997 },
 104         { .compatible = "wlf,wm8998", .data = (void *)WM8998 },
 105         { .compatible = "wlf,wm1814", .data = (void *)WM1814 },
 106         {},
 107 };
 108 MODULE_DEVICE_TABLE(of, arizona_i2c_of_match);
 109 #endif
 110
 111 static struct i2c_driver arizona_i2c_driver = {
 112         .driver = {
 113                 .name   = "arizona",
 114                 .pm     = pm_ptr(&arizona_pm_ops),
 115                 .of_match_table = of_match_ptr(arizona_i2c_of_match),
 116         },
 117         .probe          = arizona_i2c_probe,
 118         .remove         = arizona_i2c_remove,
 119         .id_table       = arizona_i2c_id,
 120 };
 121
 122 module_i2c_driver(arizona_i2c_driver);
 123
 124 MODULE_SOFTDEP("pre: arizona_ldo1");
 125 MODULE_DESCRIPTION("Arizona I2C bus interface");
 126 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 127 MODULE_LICENSE("GPL");