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Chanwoo Choi83871c02012-05-14 22:50:39 +02001/*
2 * max77693.c - mfd core driver for the MAX 77693
3 *
4 * Copyright (C) 2012 Samsung Electronics
5 * SangYoung Son <hello.son@smasung.com>
6 *
7 * This program is not provided / owned by Maxim Integrated Products.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * This driver is based on max8997.c
24 */
25
26#include <linux/module.h>
27#include <linux/slab.h>
28#include <linux/i2c.h>
29#include <linux/err.h>
30#include <linux/interrupt.h>
Sachin Kamat71c7f932013-10-18 16:11:57 +053031#include <linux/of.h>
Chanwoo Choi83871c02012-05-14 22:50:39 +020032#include <linux/pm_runtime.h>
33#include <linux/mutex.h>
34#include <linux/mfd/core.h>
35#include <linux/mfd/max77693.h>
36#include <linux/mfd/max77693-private.h>
37#include <linux/regulator/machine.h>
38#include <linux/regmap.h>
39
40#define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */
41#define I2C_ADDR_MUIC (0x4A >> 1)
42#define I2C_ADDR_HAPTIC (0x90 >> 1)
43
44static struct mfd_cell max77693_devs[] = {
45 { .name = "max77693-pmic", },
46 { .name = "max77693-charger", },
47 { .name = "max77693-flash", },
48 { .name = "max77693-muic", },
49 { .name = "max77693-haptic", },
50};
51
52int max77693_read_reg(struct regmap *map, u8 reg, u8 *dest)
53{
54 unsigned int val;
55 int ret;
56
57 ret = regmap_read(map, reg, &val);
58 *dest = val;
59
60 return ret;
61}
62EXPORT_SYMBOL_GPL(max77693_read_reg);
63
64int max77693_bulk_read(struct regmap *map, u8 reg, int count, u8 *buf)
65{
66 int ret;
67
68 ret = regmap_bulk_read(map, reg, buf, count);
69
70 return ret;
71}
72EXPORT_SYMBOL_GPL(max77693_bulk_read);
73
74int max77693_write_reg(struct regmap *map, u8 reg, u8 value)
75{
76 int ret;
77
78 ret = regmap_write(map, reg, value);
79
80 return ret;
81}
82EXPORT_SYMBOL_GPL(max77693_write_reg);
83
84int max77693_bulk_write(struct regmap *map, u8 reg, int count, u8 *buf)
85{
86 int ret;
87
88 ret = regmap_bulk_write(map, reg, buf, count);
89
90 return ret;
91}
92EXPORT_SYMBOL_GPL(max77693_bulk_write);
93
94int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask)
95{
96 int ret;
97
98 ret = regmap_update_bits(map, reg, mask, val);
99
100 return ret;
101}
102EXPORT_SYMBOL_GPL(max77693_update_reg);
103
104static const struct regmap_config max77693_regmap_config = {
105 .reg_bits = 8,
106 .val_bits = 8,
107 .max_register = MAX77693_PMIC_REG_END,
108};
109
110static int max77693_i2c_probe(struct i2c_client *i2c,
111 const struct i2c_device_id *id)
112{
113 struct max77693_dev *max77693;
Chanwoo Choi83871c02012-05-14 22:50:39 +0200114 u8 reg_data;
115 int ret = 0;
116
117 max77693 = devm_kzalloc(&i2c->dev,
118 sizeof(struct max77693_dev), GFP_KERNEL);
119 if (max77693 == NULL)
120 return -ENOMEM;
121
Chanwoo Choi83871c02012-05-14 22:50:39 +0200122 i2c_set_clientdata(i2c, max77693);
123 max77693->dev = &i2c->dev;
124 max77693->i2c = i2c;
125 max77693->irq = i2c->irq;
126 max77693->type = id->driver_data;
127
Axel Lin2429d862012-12-25 00:28:36 +0800128 max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
129 if (IS_ERR(max77693->regmap)) {
130 ret = PTR_ERR(max77693->regmap);
131 dev_err(max77693->dev, "failed to allocate register map: %d\n",
132 ret);
133 return ret;
134 }
Chanwoo Choi83871c02012-05-14 22:50:39 +0200135
Axel Lin2429d862012-12-25 00:28:36 +0800136 ret = max77693_read_reg(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
137 &reg_data);
138 if (ret < 0) {
Chanwoo Choi83871c02012-05-14 22:50:39 +0200139 dev_err(max77693->dev, "device not found on this channel\n");
Axel Lin2429d862012-12-25 00:28:36 +0800140 return ret;
Chanwoo Choi83871c02012-05-14 22:50:39 +0200141 } else
142 dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
143
144 max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
145 i2c_set_clientdata(max77693->muic, max77693);
146
147 max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
148 i2c_set_clientdata(max77693->haptic, max77693);
149
Chanwoo Choib186b122012-08-21 15:16:23 +0900150 /*
151 * Initialize register map for MUIC device because use regmap-muic
152 * instance of MUIC device when irq of max77693 is initialized
153 * before call max77693-muic probe() function.
154 */
155 max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
156 &max77693_regmap_config);
157 if (IS_ERR(max77693->regmap_muic)) {
158 ret = PTR_ERR(max77693->regmap_muic);
159 dev_err(max77693->dev,
160 "failed to allocate register map: %d\n", ret);
Axel Lin2429d862012-12-25 00:28:36 +0800161 goto err_regmap_muic;
Chanwoo Choib186b122012-08-21 15:16:23 +0900162 }
163
Chanwoo Choi6592ebb2012-05-14 22:54:20 +0200164 ret = max77693_irq_init(max77693);
165 if (ret < 0)
Axel Linff2b7ac2012-06-08 08:35:37 +0800166 goto err_irq;
Chanwoo Choi6592ebb2012-05-14 22:54:20 +0200167
Chanwoo Choi83871c02012-05-14 22:50:39 +0200168 pm_runtime_set_active(max77693->dev);
169
170 ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
Mark Brown0848c942012-09-11 15:16:36 +0800171 ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
Chanwoo Choi83871c02012-05-14 22:50:39 +0200172 if (ret < 0)
173 goto err_mfd;
174
175 return ret;
176
177err_mfd:
Axel Linff2b7ac2012-06-08 08:35:37 +0800178 max77693_irq_exit(max77693);
179err_irq:
Axel Lin2429d862012-12-25 00:28:36 +0800180err_regmap_muic:
Chanwoo Choi83871c02012-05-14 22:50:39 +0200181 i2c_unregister_device(max77693->muic);
182 i2c_unregister_device(max77693->haptic);
Chanwoo Choi83871c02012-05-14 22:50:39 +0200183 return ret;
184}
185
186static int max77693_i2c_remove(struct i2c_client *i2c)
187{
188 struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
189
190 mfd_remove_devices(max77693->dev);
Axel Linff2b7ac2012-06-08 08:35:37 +0800191 max77693_irq_exit(max77693);
Chanwoo Choi83871c02012-05-14 22:50:39 +0200192 i2c_unregister_device(max77693->muic);
193 i2c_unregister_device(max77693->haptic);
194
195 return 0;
196}
197
198static const struct i2c_device_id max77693_i2c_id[] = {
199 { "max77693", TYPE_MAX77693 },
200 { }
201};
202MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
203
Chanwoo Choi6592ebb2012-05-14 22:54:20 +0200204static int max77693_suspend(struct device *dev)
205{
206 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
207 struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
208
209 if (device_may_wakeup(dev))
210 irq_set_irq_wake(max77693->irq, 1);
211 return 0;
212}
213
214static int max77693_resume(struct device *dev)
215{
216 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
217 struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
218
219 if (device_may_wakeup(dev))
220 irq_set_irq_wake(max77693->irq, 0);
221 return max77693_irq_resume(max77693);
222}
223
Mark Brown12477a32012-06-05 16:15:59 +0100224static const struct dev_pm_ops max77693_pm = {
Chanwoo Choi6592ebb2012-05-14 22:54:20 +0200225 .suspend = max77693_suspend,
226 .resume = max77693_resume,
227};
228
Andrzej Hajda46571852013-09-27 09:27:46 +0200229#ifdef CONFIG_OF
230static struct of_device_id max77693_dt_match[] = {
231 { .compatible = "maxim,max77693" },
232 {},
233};
234#endif
235
Chanwoo Choi83871c02012-05-14 22:50:39 +0200236static struct i2c_driver max77693_i2c_driver = {
237 .driver = {
238 .name = "max77693",
239 .owner = THIS_MODULE,
Chanwoo Choi6592ebb2012-05-14 22:54:20 +0200240 .pm = &max77693_pm,
Andrzej Hajda46571852013-09-27 09:27:46 +0200241 .of_match_table = of_match_ptr(max77693_dt_match),
Chanwoo Choi83871c02012-05-14 22:50:39 +0200242 },
243 .probe = max77693_i2c_probe,
244 .remove = max77693_i2c_remove,
245 .id_table = max77693_i2c_id,
246};
247
248static int __init max77693_i2c_init(void)
249{
250 return i2c_add_driver(&max77693_i2c_driver);
251}
252/* init early so consumer devices can complete system boot */
253subsys_initcall(max77693_i2c_init);
254
255static void __exit max77693_i2c_exit(void)
256{
257 i2c_del_driver(&max77693_i2c_driver);
258}
259module_exit(max77693_i2c_exit);
260
261MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
262MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
263MODULE_LICENSE("GPL");