drm/qxl: add support for > 1 output
[linux-2.6.git] / drivers / mfd / mc13xxx-i2c.c
blobf745e27ee874a469e734cebd2757542388a0d10d
1 /*
2 * Copyright 2009-2010 Creative Product Design
3 * Marc Reilly marc@cpdesign.com.au
5 * This program is free software; you can redistribute it and/or modify it under
6 * the terms of the GNU General Public License version 2 as published by the
7 * Free Software Foundation.
8 */
10 #include <linux/slab.h>
11 #include <linux/module.h>
12 #include <linux/platform_device.h>
13 #include <linux/mutex.h>
14 #include <linux/mfd/core.h>
15 #include <linux/mfd/mc13xxx.h>
16 #include <linux/of.h>
17 #include <linux/of_device.h>
18 #include <linux/of_gpio.h>
19 #include <linux/i2c.h>
20 #include <linux/err.h>
22 #include "mc13xxx.h"
24 static const struct i2c_device_id mc13xxx_i2c_device_id[] = {
26 .name = "mc13892",
27 .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13892,
28 }, {
29 .name = "mc34708",
30 .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc34708,
31 }, {
32 /* sentinel */
35 MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id);
37 static const struct of_device_id mc13xxx_dt_ids[] = {
39 .compatible = "fsl,mc13892",
40 .data = &mc13xxx_variant_mc13892,
41 }, {
42 .compatible = "fsl,mc34708",
43 .data = &mc13xxx_variant_mc34708,
44 }, {
45 /* sentinel */
48 MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
50 static struct regmap_config mc13xxx_regmap_i2c_config = {
51 .reg_bits = 8,
52 .val_bits = 24,
54 .max_register = MC13XXX_NUMREGS,
56 .cache_type = REGCACHE_NONE,
59 static int mc13xxx_i2c_probe(struct i2c_client *client,
60 const struct i2c_device_id *id)
62 struct mc13xxx *mc13xxx;
63 struct mc13xxx_platform_data *pdata = dev_get_platdata(&client->dev);
64 int ret;
66 mc13xxx = devm_kzalloc(&client->dev, sizeof(*mc13xxx), GFP_KERNEL);
67 if (!mc13xxx)
68 return -ENOMEM;
70 dev_set_drvdata(&client->dev, mc13xxx);
72 mc13xxx->dev = &client->dev;
73 mutex_init(&mc13xxx->lock);
75 mc13xxx->regmap = devm_regmap_init_i2c(client,
76 &mc13xxx_regmap_i2c_config);
77 if (IS_ERR(mc13xxx->regmap)) {
78 ret = PTR_ERR(mc13xxx->regmap);
79 dev_err(mc13xxx->dev, "Failed to initialize register map: %d\n",
80 ret);
81 dev_set_drvdata(&client->dev, NULL);
82 return ret;
85 if (client->dev.of_node) {
86 const struct of_device_id *of_id =
87 of_match_device(mc13xxx_dt_ids, &client->dev);
88 mc13xxx->variant = of_id->data;
89 } else {
90 mc13xxx->variant = (void *)id->driver_data;
93 ret = mc13xxx_common_init(mc13xxx, pdata, client->irq);
95 return ret;
98 static int mc13xxx_i2c_remove(struct i2c_client *client)
100 struct mc13xxx *mc13xxx = dev_get_drvdata(&client->dev);
102 mc13xxx_common_cleanup(mc13xxx);
104 return 0;
107 static struct i2c_driver mc13xxx_i2c_driver = {
108 .id_table = mc13xxx_i2c_device_id,
109 .driver = {
110 .owner = THIS_MODULE,
111 .name = "mc13xxx",
112 .of_match_table = mc13xxx_dt_ids,
114 .probe = mc13xxx_i2c_probe,
115 .remove = mc13xxx_i2c_remove,
118 static int __init mc13xxx_i2c_init(void)
120 return i2c_add_driver(&mc13xxx_i2c_driver);
122 subsys_initcall(mc13xxx_i2c_init);
124 static void __exit mc13xxx_i2c_exit(void)
126 i2c_del_driver(&mc13xxx_i2c_driver);
128 module_exit(mc13xxx_i2c_exit);
130 MODULE_DESCRIPTION("i2c driver for Freescale MC13XXX PMIC");
131 MODULE_AUTHOR("Marc Reilly <marc@cpdesign.com.au");
132 MODULE_LICENSE("GPL v2");