projects / linux-2.6-block.git / blame
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1 | /* |
| 2 | * wm8350-i2c.c -- Generic I2C driver for Wolfson WM8350 PMIC | |
| 3 | * | |
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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> | |
| b7b142d9 | 18 | #include <linux/err.h> |
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19 | #include <linux/init.h> |
| 20 | #include <linux/i2c.h> | |
| 21 | #include <linux/platform_device.h> | |
| 22 | #include <linux/mfd/wm8350/core.h> | |
| b7b142d9 | 23 | #include <linux/regmap.h> |
| 5a0e3ad6 | 24 | #include <linux/slab.h> |
| c661a0b9 | 25 | |
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26 | static int wm8350_i2c_probe(struct i2c_client *i2c, |
| 27 | const struct i2c_device_id *id) | |
| 28 | { | |
| 29 | struct wm8350 *wm8350; | |
| 334a41ce | 30 | struct wm8350_platform_data *pdata = dev_get_platdata(&i2c->dev); |
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31 | int ret = 0; |
| 32 | ||
| 55ee29d5 | 33 | wm8350 = devm_kzalloc(&i2c->dev, sizeof(struct wm8350), GFP_KERNEL); |
| e47a3bbe | 34 | if (wm8350 == NULL) |
| c661a0b9 | 35 | return -ENOMEM; |
| c661a0b9 | 36 | |
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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 | ||
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45 | i2c_set_clientdata(i2c, wm8350); |
| 46 | wm8350->dev = &i2c->dev; | |
| c661a0b9 | 47 | |
| 334a41ce | 48 | return wm8350_device_init(wm8350, i2c->irq, pdata); |
| c661a0b9 MB |
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); | |
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56 | |
| 57 | return 0; | |
| 58 | } | |
| 59 | ||
| 60 | static const struct i2c_device_id wm8350_i2c_id[] = { | |
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61 | { "wm8350", 0 }, |
| 62 | { "wm8351", 0 }, | |
| 63 | { "wm8352", 0 }, | |
| 64 | { } | |
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65 | }; |
| 66 | MODULE_DEVICE_TABLE(i2c, wm8350_i2c_id); | |
| 67 | ||
| 68 | ||
| 69 | static struct i2c_driver wm8350_i2c_driver = { | |
| 70 | .driver = { | |
| 71 | .name = "wm8350", | |
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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"); |