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Viresh Kumar1a6e4b72011-11-17 11:02:20 +05301/*
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
Viresh Kumar10d89352012-06-20 12:53:02 -07009 * Author: Viresh Kumar <viresh.linux@gmail.com> for ST Microelectronics
Viresh Kumar1a6e4b72011-11-17 11:02:20 +053010 */
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>
Linus Walleij5a826fe2014-04-23 23:35:58 +020017#include <linux/of_device.h>
Viresh Kumar1a6e4b72011-11-17 11:02:20 +053018#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
Linus Walleij5a826fe2014-04-23 23:35:58 +020056static 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,stmpe1601", .data = (void *)STMPE1601, },
61 { .compatible = "st,stmpe1801", .data = (void *)STMPE1801, },
62 { .compatible = "st,stmpe2401", .data = (void *)STMPE2401, },
63 { .compatible = "st,stmpe2403", .data = (void *)STMPE2403, },
64 {},
65};
66MODULE_DEVICE_TABLE(of, stmpe_of_match);
67
Bill Pembertonf791be42012-11-19 13:23:04 -050068static int
Viresh Kumar1a6e4b72011-11-17 11:02:20 +053069stmpe_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
70{
Lee Jonesc00572b2014-07-02 11:54:32 +010071 enum stmpe_partnum partnum;
Linus Walleij5a826fe2014-04-23 23:35:58 +020072 const struct of_device_id *of_id;
73
Viresh Kumar1a6e4b72011-11-17 11:02:20 +053074 i2c_ci.data = (void *)id;
75 i2c_ci.irq = i2c->irq;
76 i2c_ci.client = i2c;
77 i2c_ci.dev = &i2c->dev;
78
Linus Walleij5a826fe2014-04-23 23:35:58 +020079 of_id = of_match_device(stmpe_of_match, &i2c->dev);
80 if (!of_id) {
81 /*
82 * This happens when the I2C ID matches the node name
83 * but no real compatible string has been given.
84 */
85 dev_info(&i2c->dev, "matching on node name, compatible is preferred\n");
86 partnum = id->driver_data;
87 } else
Lee Jonesc00572b2014-07-02 11:54:32 +010088 partnum = (enum stmpe_partnum)of_id->data;
Linus Walleij5a826fe2014-04-23 23:35:58 +020089
90 return stmpe_probe(&i2c_ci, partnum);
Viresh Kumar1a6e4b72011-11-17 11:02:20 +053091}
92
Bill Pemberton4740f732012-11-19 13:26:01 -050093static int stmpe_i2c_remove(struct i2c_client *i2c)
Viresh Kumar1a6e4b72011-11-17 11:02:20 +053094{
95 struct stmpe *stmpe = dev_get_drvdata(&i2c->dev);
96
97 return stmpe_remove(stmpe);
98}
99
100static const struct i2c_device_id stmpe_i2c_id[] = {
Viresh Kumar1cda2392011-11-17 11:02:22 +0530101 { "stmpe610", STMPE610 },
Viresh Kumar7f7f4ea2011-11-17 11:02:23 +0530102 { "stmpe801", STMPE801 },
Viresh Kumar1a6e4b72011-11-17 11:02:20 +0530103 { "stmpe811", STMPE811 },
104 { "stmpe1601", STMPE1601 },
Jean-Nicolas Graux230f13a2013-04-09 10:35:19 +0200105 { "stmpe1801", STMPE1801 },
Viresh Kumar1a6e4b72011-11-17 11:02:20 +0530106 { "stmpe2401", STMPE2401 },
107 { "stmpe2403", STMPE2403 },
108 { }
109};
110MODULE_DEVICE_TABLE(i2c, stmpe_id);
111
112static struct i2c_driver stmpe_i2c_driver = {
Viresh Kumar32533982012-11-23 00:26:19 +0530113 .driver = {
114 .name = "stmpe-i2c",
115 .owner = THIS_MODULE,
Viresh Kumar1a6e4b72011-11-17 11:02:20 +0530116#ifdef CONFIG_PM
Viresh Kumar32533982012-11-23 00:26:19 +0530117 .pm = &stmpe_dev_pm_ops,
Viresh Kumar1a6e4b72011-11-17 11:02:20 +0530118#endif
Linus Walleij5a826fe2014-04-23 23:35:58 +0200119 .of_match_table = stmpe_of_match,
Viresh Kumar32533982012-11-23 00:26:19 +0530120 },
Viresh Kumar1a6e4b72011-11-17 11:02:20 +0530121 .probe = stmpe_i2c_probe,
Bill Pemberton84449212012-11-19 13:20:24 -0500122 .remove = stmpe_i2c_remove,
Viresh Kumar1a6e4b72011-11-17 11:02:20 +0530123 .id_table = stmpe_i2c_id,
124};
125
126static int __init stmpe_init(void)
127{
128 return i2c_add_driver(&stmpe_i2c_driver);
129}
130subsys_initcall(stmpe_init);
131
132static void __exit stmpe_exit(void)
133{
134 i2c_del_driver(&stmpe_i2c_driver);
135}
136module_exit(stmpe_exit);
137
138MODULE_LICENSE("GPL v2");
139MODULE_DESCRIPTION("STMPE MFD I2C Interface Driver");
140MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>");