tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * s5m87xx.c
3 *
4 * Copyright (c) 2011 Samsung Electronics Co., Ltd
5 * http://www.samsung.com
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 */
13
14#include <linux/module.h>
15#include <linux/moduleparam.h>
16#include <linux/init.h>
17#include <linux/err.h>
18#include <linux/slab.h>
19#include <linux/i2c.h>
20#include <linux/interrupt.h>
21#include <linux/pm_runtime.h>
22#include <linux/mutex.h>
23#include <linux/mfd/core.h>
24#include <linux/mfd/s5m87xx/s5m-core.h>
25#include <linux/mfd/s5m87xx/s5m-pmic.h>
26#include <linux/mfd/s5m87xx/s5m-rtc.h>
27#include <linux/regmap.h>
28
29static struct mfd_cell s5m8751_devs[] = {
30 {
31 .name = "s5m8751-pmic",
32 }, {
33 .name = "s5m-charger",
34 }, {
35 .name = "s5m8751-codec",
36 },
37};
38
39static struct mfd_cell s5m8763_devs[] = {
40 {
41 .name = "s5m8763-pmic",
42 }, {
43 .name = "s5m-rtc",
44 }, {
45 .name = "s5m-charger",
46 },
47};
48
49static struct mfd_cell s5m8767_devs[] = {
50 {
51 .name = "s5m8767-pmic",
52 }, {
53 .name = "s5m-rtc",
54 },
55};
56
57int s5m_reg_read(struct s5m87xx_dev *s5m87xx, u8 reg, void *dest)
58{
59 return regmap_read(s5m87xx->regmap, reg, dest);
60}
61EXPORT_SYMBOL_GPL(s5m_reg_read);
62
63int s5m_bulk_read(struct s5m87xx_dev *s5m87xx, u8 reg, int count, u8 *buf)
64{
65 return regmap_bulk_read(s5m87xx->regmap, reg, buf, count);
66}
67EXPORT_SYMBOL_GPL(s5m_bulk_read);
68
69int s5m_reg_write(struct s5m87xx_dev *s5m87xx, u8 reg, u8 value)
70{
71 return regmap_write(s5m87xx->regmap, reg, value);
72}
73EXPORT_SYMBOL_GPL(s5m_reg_write);
74
75int s5m_bulk_write(struct s5m87xx_dev *s5m87xx, u8 reg, int count, u8 *buf)
76{
77 return regmap_raw_write(s5m87xx->regmap, reg, buf, count);
78}
79EXPORT_SYMBOL_GPL(s5m_bulk_write);
80
81int s5m_reg_update(struct s5m87xx_dev *s5m87xx, u8 reg, u8 val, u8 mask)
82{
83 return regmap_update_bits(s5m87xx->regmap, reg, mask, val);
84}
85EXPORT_SYMBOL_GPL(s5m_reg_update);
86
87static struct regmap_config s5m_regmap_config = {
88 .reg_bits = 8,
89 .val_bits = 8,
90};
91
92static int s5m87xx_i2c_probe(struct i2c_client *i2c,
93 const struct i2c_device_id *id)
94{
95 struct s5m_platform_data *pdata = i2c->dev.platform_data;
96 struct s5m87xx_dev *s5m87xx;
97 int ret;
98
99 s5m87xx = devm_kzalloc(&i2c->dev, sizeof(struct s5m87xx_dev),
100 GFP_KERNEL);
101 if (s5m87xx == NULL)
102 return -ENOMEM;
103
104 i2c_set_clientdata(i2c, s5m87xx);
105 s5m87xx->dev = &i2c->dev;
106 s5m87xx->i2c = i2c;
107 s5m87xx->irq = i2c->irq;
108 s5m87xx->type = id->driver_data;
109
110 if (pdata) {
111 s5m87xx->device_type = pdata->device_type;
112 s5m87xx->ono = pdata->ono;
113 s5m87xx->irq_base = pdata->irq_base;
114 s5m87xx->wakeup = pdata->wakeup;
115 }
116
117 s5m87xx->regmap = regmap_init_i2c(i2c, &s5m_regmap_config);
118 if (IS_ERR(s5m87xx->regmap)) {
119 ret = PTR_ERR(s5m87xx->regmap);
120 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
121 ret);
122 goto err;
123 }
124
125 s5m87xx->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
126 i2c_set_clientdata(s5m87xx->rtc, s5m87xx);
127
128 if (pdata && pdata->cfg_pmic_irq)
129 pdata->cfg_pmic_irq();
130
131 s5m_irq_init(s5m87xx);
132
133 pm_runtime_set_active(s5m87xx->dev);
134
135 switch (s5m87xx->device_type) {
136 case S5M8751X:
137 ret = mfd_add_devices(s5m87xx->dev, -1, s5m8751_devs,
138 ARRAY_SIZE(s5m8751_devs), NULL, 0);
139 break;
140 case S5M8763X:
141 ret = mfd_add_devices(s5m87xx->dev, -1, s5m8763_devs,
142 ARRAY_SIZE(s5m8763_devs), NULL, 0);
143 break;
144 case S5M8767X:
145 ret = mfd_add_devices(s5m87xx->dev, -1, s5m8767_devs,
146 ARRAY_SIZE(s5m8767_devs), NULL, 0);
147 break;
148 default:
149 /* If this happens the probe function is problem */
150 BUG();
151 }
152
153 if (ret < 0)
154 goto err;
155
156 return ret;
157
158err:
159 mfd_remove_devices(s5m87xx->dev);
160 s5m_irq_exit(s5m87xx);
161 i2c_unregister_device(s5m87xx->rtc);
162 regmap_exit(s5m87xx->regmap);
163 return ret;
164}
165
166static int s5m87xx_i2c_remove(struct i2c_client *i2c)
167{
168 struct s5m87xx_dev *s5m87xx = i2c_get_clientdata(i2c);
169
170 mfd_remove_devices(s5m87xx->dev);
171 s5m_irq_exit(s5m87xx);
172 i2c_unregister_device(s5m87xx->rtc);
173 regmap_exit(s5m87xx->regmap);
174 return 0;
175}
176
177static const struct i2c_device_id s5m87xx_i2c_id[] = {
178 { "s5m87xx", 0 },
179 { }
180};
181MODULE_DEVICE_TABLE(i2c, s5m87xx_i2c_id);
182
183static struct i2c_driver s5m87xx_i2c_driver = {
184 .driver = {
185 .name = "s5m87xx",
186 .owner = THIS_MODULE,
187 },
188 .probe = s5m87xx_i2c_probe,
189 .remove = s5m87xx_i2c_remove,
190 .id_table = s5m87xx_i2c_id,
191};
192
193static int __init s5m87xx_i2c_init(void)
194{
195 return i2c_add_driver(&s5m87xx_i2c_driver);
196}
197
198subsys_initcall(s5m87xx_i2c_init);
199
200static void __exit s5m87xx_i2c_exit(void)
201{
202 i2c_del_driver(&s5m87xx_i2c_driver);
203}
204module_exit(s5m87xx_i2c_exit);
205
206MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
207MODULE_DESCRIPTION("Core support for the S5M MFD");
208MODULE_LICENSE("GPL");