1/*
2 * ST Microelectronics MFD: stmpe's i2c client specific driver
3 *
4 * Copyright (C) ST-Ericsson SA 2010
5 * Copyright (C) ST Microelectronics SA 2011
6 *
7 * License Terms: GNU General Public License, version 2
8 * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
9 * Author: Viresh Kumar <vireshk@kernel.org> for ST Microelectronics
10 */
11
12#include <linux/i2c.h>
13#include <linux/interrupt.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/types.h>
17#include <linux/of_device.h>
18#include "stmpe.h"
19
20static int i2c_reg_read(struct stmpe *stmpe, u8 reg)
21{
22 struct i2c_client *i2c = stmpe->client;
23
24 return i2c_smbus_read_byte_data(i2c, reg);
25}
26
27static int i2c_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
28{
29 struct i2c_client *i2c = stmpe->client;
30
31 return i2c_smbus_write_byte_data(i2c, reg, val);
32}
33
34static int i2c_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values)
35{
36 struct i2c_client *i2c = stmpe->client;
37
38 return i2c_smbus_read_i2c_block_data(i2c, reg, length, values);
39}
40
41static int i2c_block_write(struct stmpe *stmpe, u8 reg, u8 length,
42 const u8 *values)
43{
44 struct i2c_client *i2c = stmpe->client;
45
46 return i2c_smbus_write_i2c_block_data(i2c, reg, length, values);
47}
48
49static struct stmpe_client_info i2c_ci = {
50 .read_byte = i2c_reg_read,
51 .write_byte = i2c_reg_write,
52 .read_block = i2c_block_read,
53 .write_block = i2c_block_write,
54};
55
56static const struct of_device_id stmpe_of_match[] = {
57 { .compatible = "st,stmpe610", .data = (void *)STMPE610, },
58 { .compatible = "st,stmpe801", .data = (void *)STMPE801, },
59 { .compatible = "st,stmpe811", .data = (void *)STMPE811, },
60 { .compatible = "st,stmpe1600", .data = (void *)STMPE1600, },
61 { .compatible = "st,stmpe1601", .data = (void *)STMPE1601, },
62 { .compatible = "st,stmpe1801", .data = (void *)STMPE1801, },
63 { .compatible = "st,stmpe2401", .data = (void *)STMPE2401, },
64 { .compatible = "st,stmpe2403", .data = (void *)STMPE2403, },
65 {},
66};
67MODULE_DEVICE_TABLE(of, stmpe_of_match);
68
69static int
70stmpe_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
71{
72 enum stmpe_partnum partnum;
73 const struct of_device_id *of_id;
74
75 i2c_ci.data = (void *)id;
76 i2c_ci.irq = i2c->irq;
77 i2c_ci.client = i2c;
78 i2c_ci.dev = &i2c->dev;
79
80 of_id = of_match_device(stmpe_of_match, &i2c->dev);
81 if (!of_id) {
82 /*
83 * This happens when the I2C ID matches the node name
84 * but no real compatible string has been given.
85 */
86 dev_info(&i2c->dev, "matching on node name, compatible is preferred\n");
87 partnum = id->driver_data;
88 } else
89 partnum = (enum stmpe_partnum)of_id->data;
90
91 return stmpe_probe(&i2c_ci, partnum);
92}
93
94static int stmpe_i2c_remove(struct i2c_client *i2c)
95{
96 struct stmpe *stmpe = dev_get_drvdata(&i2c->dev);
97
98 return stmpe_remove(stmpe);
99}
100
101static const struct i2c_device_id stmpe_i2c_id[] = {
102 { "stmpe610", STMPE610 },
103 { "stmpe801", STMPE801 },
104 { "stmpe811", STMPE811 },
105 { "stmpe1600", STMPE1600 },
106 { "stmpe1601", STMPE1601 },
107 { "stmpe1801", STMPE1801 },
108 { "stmpe2401", STMPE2401 },
109 { "stmpe2403", STMPE2403 },
110 { }
111};
112MODULE_DEVICE_TABLE(i2c, stmpe_id);
113
114static struct i2c_driver stmpe_i2c_driver = {
115 .driver = {
116 .name = "stmpe-i2c",
117#ifdef CONFIG_PM
118 .pm = &stmpe_dev_pm_ops,
119#endif
120 .of_match_table = stmpe_of_match,
121 },
122 .probe = stmpe_i2c_probe,
123 .remove = stmpe_i2c_remove,
124 .id_table = stmpe_i2c_id,
125};
126
127static int __init stmpe_init(void)
128{
129 return i2c_add_driver(&stmpe_i2c_driver);
130}
131subsys_initcall(stmpe_init);
132
133static void __exit stmpe_exit(void)
134{
135 i2c_del_driver(&stmpe_i2c_driver);
136}
137module_exit(stmpe_exit);
138
139MODULE_LICENSE("GPL v2");
140MODULE_DESCRIPTION("STMPE MFD I2C Interface Driver");
141MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>");
142