2 * wm8350-i2c.c -- Generic I2C driver for Wolfson WM8350 PMIC
4 * This driver defines and configures the WM8350 for the Freescale i.MX32ADS.
6 * Copyright 2007, 2008 Wolfson Microelectronics PLC.
8 * Author: Liam Girdwood
9 * linux@wolfsonmicro.com
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
18 #include <linux/module.h>
19 #include <linux/moduleparam.h>
20 #include <linux/init.h>
21 #include <linux/i2c.h>
22 #include <linux/platform_device.h>
23 #include <linux/mfd/wm8350/core.h>
25 static int wm8350_i2c_read_device(struct wm8350 *wm8350, char reg,
26 int bytes, void *dest)
30 ret = i2c_master_send(wm8350->i2c_client, ®, 1);
33 return i2c_master_recv(wm8350->i2c_client, dest, bytes);
36 static int wm8350_i2c_write_device(struct wm8350 *wm8350, char reg,
39 /* we add 1 byte for device register */
40 u8 msg[(WM8350_MAX_REGISTER << 1) + 1];
42 if (bytes > ((WM8350_MAX_REGISTER << 1) + 1))
46 memcpy(&msg[1], src, bytes);
47 return i2c_master_send(wm8350->i2c_client, msg, bytes + 1);
50 static int wm8350_i2c_probe(struct i2c_client *i2c,
51 const struct i2c_device_id *id)
53 struct wm8350 *wm8350;
56 wm8350 = kzalloc(sizeof(struct wm8350), GFP_KERNEL);
62 i2c_set_clientdata(i2c, wm8350);
63 wm8350->dev = &i2c->dev;
64 wm8350->i2c_client = i2c;
65 wm8350->read_dev = wm8350_i2c_read_device;
66 wm8350->write_dev = wm8350_i2c_write_device;
68 ret = wm8350_device_init(wm8350, i2c->irq, i2c->dev.platform_data);
79 static int wm8350_i2c_remove(struct i2c_client *i2c)
81 struct wm8350 *wm8350 = i2c_get_clientdata(i2c);
83 wm8350_device_exit(wm8350);
89 static const struct i2c_device_id wm8350_i2c_id[] = {
93 MODULE_DEVICE_TABLE(i2c, wm8350_i2c_id);
96 static struct i2c_driver wm8350_i2c_driver = {
101 .probe = wm8350_i2c_probe,
102 .remove = wm8350_i2c_remove,
103 .id_table = wm8350_i2c_id,
106 static int __init wm8350_i2c_init(void)
108 return i2c_add_driver(&wm8350_i2c_driver);
110 /* init early so consumer devices can complete system boot */
111 subsys_initcall(wm8350_i2c_init);
113 static void __exit wm8350_i2c_exit(void)
115 i2c_del_driver(&wm8350_i2c_driver);
117 module_exit(wm8350_i2c_exit);
119 MODULE_DESCRIPTION("I2C support for the WM8350 AudioPlus PMIC");
120 MODULE_LICENSE("GPL");