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stmpe-i2c.c
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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 <[email protected]> for ST-Ericsson
9  * Author: Viresh Kumar <[email protected]> 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 "stmpe.h"
18 
19 static int i2c_reg_read(struct stmpe *stmpe, u8 reg)
20 {
21  struct i2c_client *i2c = stmpe->client;
22 
23  return i2c_smbus_read_byte_data(i2c, reg);
24 }
25 
26 static int i2c_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
27 {
28  struct i2c_client *i2c = stmpe->client;
29 
30  return i2c_smbus_write_byte_data(i2c, reg, val);
31 }
32 
33 static int i2c_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values)
34 {
35  struct i2c_client *i2c = stmpe->client;
36 
37  return i2c_smbus_read_i2c_block_data(i2c, reg, length, values);
38 }
39 
40 static int i2c_block_write(struct stmpe *stmpe, u8 reg, u8 length,
41  const u8 *values)
42 {
43  struct i2c_client *i2c = stmpe->client;
44 
45  return i2c_smbus_write_i2c_block_data(i2c, reg, length, values);
46 }
47 
48 static struct stmpe_client_info i2c_ci = {
49  .read_byte = i2c_reg_read,
50  .write_byte = i2c_reg_write,
51  .read_block = i2c_block_read,
52  .write_block = i2c_block_write,
53 };
54 
55 static int __devinit
56 stmpe_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
57 {
58  i2c_ci.data = (void *)id;
59  i2c_ci.irq = i2c->irq;
60  i2c_ci.client = i2c;
61  i2c_ci.dev = &i2c->dev;
62 
63  return stmpe_probe(&i2c_ci, id->driver_data);
64 }
65 
66 static int __devexit stmpe_i2c_remove(struct i2c_client *i2c)
67 {
68  struct stmpe *stmpe = dev_get_drvdata(&i2c->dev);
69 
70  return stmpe_remove(stmpe);
71 }
72 
73 static const struct i2c_device_id stmpe_i2c_id[] = {
74  { "stmpe610", STMPE610 },
75  { "stmpe801", STMPE801 },
76  { "stmpe811", STMPE811 },
77  { "stmpe1601", STMPE1601 },
78  { "stmpe2401", STMPE2401 },
79  { "stmpe2403", STMPE2403 },
80  { }
81 };
82 MODULE_DEVICE_TABLE(i2c, stmpe_id);
83 
84 static struct i2c_driver stmpe_i2c_driver = {
85  .driver.name = "stmpe-i2c",
86  .driver.owner = THIS_MODULE,
87 #ifdef CONFIG_PM
88  .driver.pm = &stmpe_dev_pm_ops,
89 #endif
90  .probe = stmpe_i2c_probe,
91  .remove = __devexit_p(stmpe_i2c_remove),
92  .id_table = stmpe_i2c_id,
93 };
94 
95 static int __init stmpe_init(void)
96 {
97  return i2c_add_driver(&stmpe_i2c_driver);
98 }
99 subsys_initcall(stmpe_init);
100 
101 static void __exit stmpe_exit(void)
102 {
103  i2c_del_driver(&stmpe_i2c_driver);
104 }
105 module_exit(stmpe_exit);
106 
107 MODULE_LICENSE("GPL v2");
108 MODULE_DESCRIPTION("STMPE MFD I2C Interface Driver");
109 MODULE_AUTHOR("Rabin Vincent <[email protected]>");