1 /*
2 * Copyright 2009-2010 Creative Product Design
3 * Marc Reilly marc@cpdesign.com.au
4 *
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 */
9
10 #include <linux/slab.h>
11 #include <linux/module.h>
12 #include <linux/platform_device.h>
13 #include <linux/mfd/core.h>
14 #include <linux/mfd/mc13xxx.h>
15 #include <linux/of.h>
16 #include <linux/of_device.h>
17 #include <linux/of_gpio.h>
18 #include <linux/i2c.h>
19 #include <linux/err.h>
20
21 #include "mc13xxx.h"
22
23 static const struct i2c_device_id mc13xxx_i2c_device_id[] = {
24 {
25 .name = "mc13892",
26 .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13892,
27 }, {
28 .name = "mc34708",
29 .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc34708,
30 }, {
31 /* sentinel */
32 }
33 };
34 MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id);
35
36 static const struct of_device_id mc13xxx_dt_ids[] = {
37 {
38 .compatible = "fsl,mc13892",
39 .data = &mc13xxx_variant_mc13892,
40 }, {
41 .compatible = "fsl,mc34708",
42 .data = &mc13xxx_variant_mc34708,
43 }, {
44 /* sentinel */
45 }
46 };
47 MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
48
49 static struct regmap_config mc13xxx_regmap_i2c_config = {
50 .reg_bits = 8,
51 .val_bits = 24,
52
53 .max_register = MC13XXX_NUMREGS,
54
55 .cache_type = REGCACHE_NONE,
56 };
57
mc13xxx_i2c_probe(struct i2c_client * client,const struct i2c_device_id * id)58 static int mc13xxx_i2c_probe(struct i2c_client *client,
59 const struct i2c_device_id *id)
60 {
61 struct mc13xxx *mc13xxx;
62 int ret;
63
64 mc13xxx = devm_kzalloc(&client->dev, sizeof(*mc13xxx), GFP_KERNEL);
65 if (!mc13xxx)
66 return -ENOMEM;
67
68 dev_set_drvdata(&client->dev, mc13xxx);
69
70 mc13xxx->irq = client->irq;
71
72 mc13xxx->regmap = devm_regmap_init_i2c(client,
73 &mc13xxx_regmap_i2c_config);
74 if (IS_ERR(mc13xxx->regmap)) {
75 ret = PTR_ERR(mc13xxx->regmap);
76 dev_err(&client->dev, "Failed to initialize regmap: %d\n", ret);
77 return ret;
78 }
79
80 if (client->dev.of_node) {
81 const struct of_device_id *of_id =
82 of_match_device(mc13xxx_dt_ids, &client->dev);
83 mc13xxx->variant = of_id->data;
84 } else {
85 mc13xxx->variant = (void *)id->driver_data;
86 }
87
88 return mc13xxx_common_init(&client->dev);
89 }
90
mc13xxx_i2c_remove(struct i2c_client * client)91 static int mc13xxx_i2c_remove(struct i2c_client *client)
92 {
93 return mc13xxx_common_exit(&client->dev);
94 }
95
96 static struct i2c_driver mc13xxx_i2c_driver = {
97 .id_table = mc13xxx_i2c_device_id,
98 .driver = {
99 .owner = THIS_MODULE,
100 .name = "mc13xxx",
101 .of_match_table = mc13xxx_dt_ids,
102 },
103 .probe = mc13xxx_i2c_probe,
104 .remove = mc13xxx_i2c_remove,
105 };
106
mc13xxx_i2c_init(void)107 static int __init mc13xxx_i2c_init(void)
108 {
109 return i2c_add_driver(&mc13xxx_i2c_driver);
110 }
111 subsys_initcall(mc13xxx_i2c_init);
112
mc13xxx_i2c_exit(void)113 static void __exit mc13xxx_i2c_exit(void)
114 {
115 i2c_del_driver(&mc13xxx_i2c_driver);
116 }
117 module_exit(mc13xxx_i2c_exit);
118
119 MODULE_DESCRIPTION("i2c driver for Freescale MC13XXX PMIC");
120 MODULE_AUTHOR("Marc Reilly <marc@cpdesign.com.au");
121 MODULE_LICENSE("GPL v2");
122