1 /* 2 * wm8350-i2c.c -- Generic I2C driver for Wolfson WM8350 PMIC 3 * 4 * Copyright 2007, 2008 Wolfson Microelectronics PLC. 5 * 6 * Author: Liam Girdwood 7 * linux@wolfsonmicro.com 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the 11 * Free Software Foundation; either version 2 of the License, or (at your 12 * option) any later version. 13 * 14 */ 15 16 #include <linux/module.h> 17 #include <linux/moduleparam.h> 18 #include <linux/err.h> 19 #include <linux/init.h> 20 #include <linux/i2c.h> 21 #include <linux/platform_device.h> 22 #include <linux/mfd/wm8350/core.h> 23 #include <linux/regmap.h> 24 #include <linux/slab.h> 25 26 static int wm8350_i2c_probe(struct i2c_client *i2c, 27 const struct i2c_device_id *id) 28 { 29 struct wm8350 *wm8350; 30 struct wm8350_platform_data *pdata = dev_get_platdata(&i2c->dev); 31 int ret = 0; 32 33 wm8350 = devm_kzalloc(&i2c->dev, sizeof(struct wm8350), GFP_KERNEL); 34 if (wm8350 == NULL) 35 return -ENOMEM; 36 37 wm8350->regmap = devm_regmap_init_i2c(i2c, &wm8350_regmap); 38 if (IS_ERR(wm8350->regmap)) { 39 ret = PTR_ERR(wm8350->regmap); 40 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 41 ret); 42 return ret; 43 } 44 45 i2c_set_clientdata(i2c, wm8350); 46 wm8350->dev = &i2c->dev; 47 48 return wm8350_device_init(wm8350, i2c->irq, pdata); 49 } 50 51 static int wm8350_i2c_remove(struct i2c_client *i2c) 52 { 53 struct wm8350 *wm8350 = i2c_get_clientdata(i2c); 54 55 wm8350_device_exit(wm8350); 56 57 return 0; 58 } 59 60 static const struct i2c_device_id wm8350_i2c_id[] = { 61 { "wm8350", 0 }, 62 { "wm8351", 0 }, 63 { "wm8352", 0 }, 64 { } 65 }; 66 MODULE_DEVICE_TABLE(i2c, wm8350_i2c_id); 67 68 69 static struct i2c_driver wm8350_i2c_driver = { 70 .driver = { 71 .name = "wm8350", 72 }, 73 .probe = wm8350_i2c_probe, 74 .remove = wm8350_i2c_remove, 75 .id_table = wm8350_i2c_id, 76 }; 77 78 static int __init wm8350_i2c_init(void) 79 { 80 return i2c_add_driver(&wm8350_i2c_driver); 81 } 82 /* init early so consumer devices can complete system boot */ 83 subsys_initcall(wm8350_i2c_init); 84 85 static void __exit wm8350_i2c_exit(void) 86 { 87 i2c_del_driver(&wm8350_i2c_driver); 88 } 89 module_exit(wm8350_i2c_exit); 90 91 MODULE_DESCRIPTION("I2C support for the WM8350 AudioPlus PMIC"); 92 MODULE_LICENSE("GPL"); 93