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 const struct regmap_config wm8350_regmap = { 27 .reg_bits = 8, 28 .val_bits = 16, 29 }; 30 31 static int wm8350_i2c_probe(struct i2c_client *i2c, 32 const struct i2c_device_id *id) 33 { 34 struct wm8350 *wm8350; 35 int ret = 0; 36 37 wm8350 = devm_kzalloc(&i2c->dev, sizeof(struct wm8350), GFP_KERNEL); 38 if (wm8350 == NULL) 39 return -ENOMEM; 40 41 wm8350->regmap = devm_regmap_init_i2c(i2c, &wm8350_regmap); 42 if (IS_ERR(wm8350->regmap)) { 43 ret = PTR_ERR(wm8350->regmap); 44 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 45 ret); 46 return ret; 47 } 48 49 i2c_set_clientdata(i2c, wm8350); 50 wm8350->dev = &i2c->dev; 51 52 return wm8350_device_init(wm8350, i2c->irq, i2c->dev.platform_data); 53 } 54 55 static int wm8350_i2c_remove(struct i2c_client *i2c) 56 { 57 struct wm8350 *wm8350 = i2c_get_clientdata(i2c); 58 59 wm8350_device_exit(wm8350); 60 61 return 0; 62 } 63 64 static const struct i2c_device_id wm8350_i2c_id[] = { 65 { "wm8350", 0 }, 66 { "wm8351", 0 }, 67 { "wm8352", 0 }, 68 { } 69 }; 70 MODULE_DEVICE_TABLE(i2c, wm8350_i2c_id); 71 72 73 static struct i2c_driver wm8350_i2c_driver = { 74 .driver = { 75 .name = "wm8350", 76 .owner = THIS_MODULE, 77 }, 78 .probe = wm8350_i2c_probe, 79 .remove = wm8350_i2c_remove, 80 .id_table = wm8350_i2c_id, 81 }; 82 83 static int __init wm8350_i2c_init(void) 84 { 85 return i2c_add_driver(&wm8350_i2c_driver); 86 } 87 /* init early so consumer devices can complete system boot */ 88 subsys_initcall(wm8350_i2c_init); 89 90 static void __exit wm8350_i2c_exit(void) 91 { 92 i2c_del_driver(&wm8350_i2c_driver); 93 } 94 module_exit(wm8350_i2c_exit); 95 96 MODULE_DESCRIPTION("I2C support for the WM8350 AudioPlus PMIC"); 97 MODULE_LICENSE("GPL"); 98