drivers/mfd/wm8350-i2c.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * wm8350-i2c.c  --  Generic I2C driver for Wolfson WM8350 PMIC
   4  *
   5  * Copyright 2007, 2008 Wolfson Microelectronics PLC.
   6  *
   7  * Author: Liam Girdwood
   8  *         linux@wolfsonmicro.com
   9  */
  10
  11 #include <linux/err.h>
  12 #include <linux/init.h>
  13 #include <linux/i2c.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/mfd/wm8350/core.h>
  16 #include <linux/regmap.h>
  17 #include <linux/slab.h>
  18
  19 static int wm8350_i2c_probe(struct i2c_client *i2c,
  20                             const struct i2c_device_id *id)
  21 {
  22         struct wm8350 *wm8350;
  23         struct wm8350_platform_data *pdata = dev_get_platdata(&i2c->dev);
  24         int ret = 0;
  25
  26         wm8350 = devm_kzalloc(&i2c->dev, sizeof(struct wm8350), GFP_KERNEL);
  27         if (wm8350 == NULL)
  28                 return -ENOMEM;
  29
  30         wm8350->regmap = devm_regmap_init_i2c(i2c, &wm8350_regmap);
  31         if (IS_ERR(wm8350->regmap)) {
  32                 ret = PTR_ERR(wm8350->regmap);
  33                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
  34                         ret);
  35                 return ret;
  36         }
  37
  38         i2c_set_clientdata(i2c, wm8350);
  39         wm8350->dev = &i2c->dev;
  40
  41         return wm8350_device_init(wm8350, i2c->irq, pdata);
  42 }
  43
  44 static const struct i2c_device_id wm8350_i2c_id[] = {
  45         { "wm8350", 0 },
  46         { "wm8351", 0 },
  47         { "wm8352", 0 },
  48         { }
  49 };
  50
  51 static struct i2c_driver wm8350_i2c_driver = {
  52         .driver = {
  53                    .name = "wm8350",
  54                    .suppress_bind_attrs = true,
  55         },
  56         .probe = wm8350_i2c_probe,
  57         .id_table = wm8350_i2c_id,
  58 };
  59
  60 static int __init wm8350_i2c_init(void)
  61 {
  62         return i2c_add_driver(&wm8350_i2c_driver);
  63 }
  64 /* init early so consumer devices can complete system boot */
  65 subsys_initcall(wm8350_i2c_init);