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Graeme Gregory27c67502011-05-02 16:19:46 -05001/*
2 * tps65910.c -- TI TPS6591x
3 *
4 * Copyright 2010 Texas Instruments Inc.
5 *
6 * Author: Graeme Gregory <gg@slimlogic.co.uk>
7 * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 */
15
16#include <linux/module.h>
17#include <linux/moduleparam.h>
18#include <linux/init.h>
19#include <linux/slab.h>
20#include <linux/i2c.h>
21#include <linux/gpio.h>
22#include <linux/mfd/core.h>
23#include <linux/mfd/tps65910.h>
24
25static struct mfd_cell tps65910s[] = {
26 {
27 .name = "tps65910-pmic",
28 },
29 {
30 .name = "tps65910-rtc",
31 },
32 {
33 .name = "tps65910-power",
34 },
35};
36
37
38static int tps65910_i2c_read(struct tps65910 *tps65910, u8 reg,
39 int bytes, void *dest)
40{
41 struct i2c_client *i2c = tps65910->i2c_client;
42 struct i2c_msg xfer[2];
43 int ret;
44
45 /* Write register */
46 xfer[0].addr = i2c->addr;
47 xfer[0].flags = 0;
48 xfer[0].len = 1;
49 xfer[0].buf = &reg;
50
51 /* Read data */
52 xfer[1].addr = i2c->addr;
53 xfer[1].flags = I2C_M_RD;
54 xfer[1].len = bytes;
55 xfer[1].buf = dest;
56
57 ret = i2c_transfer(i2c->adapter, xfer, 2);
58 if (ret == 2)
59 ret = 0;
60 else if (ret >= 0)
61 ret = -EIO;
62
63 return ret;
64}
65
66static int tps65910_i2c_write(struct tps65910 *tps65910, u8 reg,
67 int bytes, void *src)
68{
69 struct i2c_client *i2c = tps65910->i2c_client;
70 /* we add 1 byte for device register */
71 u8 msg[TPS65910_MAX_REGISTER + 1];
72 int ret;
73
Axel Lin0514e9a2011-05-16 22:19:01 +080074 if (bytes > TPS65910_MAX_REGISTER)
Graeme Gregory27c67502011-05-02 16:19:46 -050075 return -EINVAL;
76
77 msg[0] = reg;
78 memcpy(&msg[1], src, bytes);
79
80 ret = i2c_master_send(i2c, msg, bytes + 1);
81 if (ret < 0)
82 return ret;
83 if (ret != bytes + 1)
84 return -EIO;
85 return 0;
86}
87
88int tps65910_set_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
89{
90 u8 data;
91 int err;
92
93 mutex_lock(&tps65910->io_mutex);
94 err = tps65910_i2c_read(tps65910, reg, 1, &data);
95 if (err) {
96 dev_err(tps65910->dev, "read from reg %x failed\n", reg);
97 goto out;
98 }
99
100 data |= mask;
101 err = tps65910_i2c_write(tps65910, reg, 1, &data);
102 if (err)
103 dev_err(tps65910->dev, "write to reg %x failed\n", reg);
104
105out:
106 mutex_unlock(&tps65910->io_mutex);
107 return err;
108}
109EXPORT_SYMBOL_GPL(tps65910_set_bits);
110
111int tps65910_clear_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
112{
113 u8 data;
114 int err;
115
116 mutex_lock(&tps65910->io_mutex);
117 err = tps65910_i2c_read(tps65910, reg, 1, &data);
118 if (err) {
119 dev_err(tps65910->dev, "read from reg %x failed\n", reg);
120 goto out;
121 }
122
123 data &= mask;
124 err = tps65910_i2c_write(tps65910, reg, 1, &data);
125 if (err)
126 dev_err(tps65910->dev, "write to reg %x failed\n", reg);
127
128out:
129 mutex_unlock(&tps65910->io_mutex);
130 return err;
131}
132EXPORT_SYMBOL_GPL(tps65910_clear_bits);
133
134static int tps65910_i2c_probe(struct i2c_client *i2c,
135 const struct i2c_device_id *id)
136{
137 struct tps65910 *tps65910;
Graeme Gregory2537df72011-05-02 16:19:52 -0500138 struct tps65910_board *pmic_plat_data;
Graeme Gregorye3471bd2011-05-02 16:20:04 -0500139 struct tps65910_platform_data *init_data;
Graeme Gregory27c67502011-05-02 16:19:46 -0500140 int ret = 0;
141
Graeme Gregory2537df72011-05-02 16:19:52 -0500142 pmic_plat_data = dev_get_platdata(&i2c->dev);
143 if (!pmic_plat_data)
144 return -EINVAL;
145
Graeme Gregorye3471bd2011-05-02 16:20:04 -0500146 init_data = kzalloc(sizeof(struct tps65910_platform_data), GFP_KERNEL);
147 if (init_data == NULL)
148 return -ENOMEM;
149
Graeme Gregory27c67502011-05-02 16:19:46 -0500150 tps65910 = kzalloc(sizeof(struct tps65910), GFP_KERNEL);
Jesper Juhldc7e4122011-07-06 00:29:07 +0200151 if (tps65910 == NULL) {
152 kfree(init_data);
Graeme Gregory27c67502011-05-02 16:19:46 -0500153 return -ENOMEM;
Jesper Juhldc7e4122011-07-06 00:29:07 +0200154 }
Graeme Gregory27c67502011-05-02 16:19:46 -0500155
156 i2c_set_clientdata(i2c, tps65910);
157 tps65910->dev = &i2c->dev;
158 tps65910->i2c_client = i2c;
Jorge Eduardo Candelaria79557052011-05-16 18:34:59 -0500159 tps65910->id = id->driver_data;
Graeme Gregory27c67502011-05-02 16:19:46 -0500160 tps65910->read = tps65910_i2c_read;
161 tps65910->write = tps65910_i2c_write;
162 mutex_init(&tps65910->io_mutex);
163
164 ret = mfd_add_devices(tps65910->dev, -1,
165 tps65910s, ARRAY_SIZE(tps65910s),
166 NULL, 0);
167 if (ret < 0)
168 goto err;
169
Jesper Juhlb1224cd2011-07-13 23:22:26 +0200170 init_data->irq = pmic_plat_data->irq;
171 init_data->irq_base = pmic_plat_data->irq;
172
Graeme Gregory2537df72011-05-02 16:19:52 -0500173 tps65910_gpio_init(tps65910, pmic_plat_data->gpio_base);
174
Graeme Gregorye3471bd2011-05-02 16:20:04 -0500175 ret = tps65910_irq_init(tps65910, init_data->irq, init_data);
176 if (ret < 0)
177 goto err;
178
Jesper Juhldc7e4122011-07-06 00:29:07 +0200179 kfree(init_data);
Graeme Gregory27c67502011-05-02 16:19:46 -0500180 return ret;
181
182err:
183 mfd_remove_devices(tps65910->dev);
184 kfree(tps65910);
Jesper Juhldc7e4122011-07-06 00:29:07 +0200185 kfree(init_data);
Graeme Gregory27c67502011-05-02 16:19:46 -0500186 return ret;
187}
188
189static int tps65910_i2c_remove(struct i2c_client *i2c)
190{
191 struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
192
193 mfd_remove_devices(tps65910->dev);
Mark Brownec2328c2011-06-20 11:47:55 +0100194 tps65910_irq_exit(tps65910);
Graeme Gregory27c67502011-05-02 16:19:46 -0500195 kfree(tps65910);
196
197 return 0;
198}
199
200static const struct i2c_device_id tps65910_i2c_id[] = {
Jorge Eduardo Candelaria79557052011-05-16 18:34:59 -0500201 { "tps65910", TPS65910 },
202 { "tps65911", TPS65911 },
Graeme Gregory27c67502011-05-02 16:19:46 -0500203 { }
204};
205MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
206
207
208static struct i2c_driver tps65910_i2c_driver = {
209 .driver = {
210 .name = "tps65910",
211 .owner = THIS_MODULE,
212 },
213 .probe = tps65910_i2c_probe,
214 .remove = tps65910_i2c_remove,
215 .id_table = tps65910_i2c_id,
216};
217
218static int __init tps65910_i2c_init(void)
219{
220 return i2c_add_driver(&tps65910_i2c_driver);
221}
222/* init early so consumer devices can complete system boot */
223subsys_initcall(tps65910_i2c_init);
224
225static void __exit tps65910_i2c_exit(void)
226{
227 i2c_del_driver(&tps65910_i2c_driver);
228}
229module_exit(tps65910_i2c_exit);
230
231MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
232MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
233MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
234MODULE_LICENSE("GPL");