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android-review.linaro.org / kernel / hikey-linaro / 527e7e9a82ec95cdb8f694855004b3d262efd09f / . / drivers / mfd / max8997.c
blob: 5d1fca0277ef3da09560e219912a76c5e3d0af14 [file] [log] [blame]
MyungJoo Ham527e7e92011-03-04 15:50:26 +0900[diff] [blame^]1/*
2 * max8997.c - mfd core driver for the Maxim 8966 and 8997
3 *
4 * Copyright (C) 2011 Samsung Electronics
5 * MyungJoo Ham <myungjoo.ham@smasung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 * This driver is based on max8998.c
22 */
23
24#include <linux/slab.h>
25#include <linux/i2c.h>
26#include <linux/pm_runtime.h>
27#include <linux/mutex.h>
28#include <linux/mfd/core.h>
29#include <linux/mfd/max8997.h>
30#include <linux/mfd/max8997-private.h>
31
32#define I2C_ADDR_PMIC (0xCC >> 1)
33#define I2C_ADDR_MUIC (0x4A >> 1)
34#define I2C_ADDR_BATTERY (0x6C >> 1)
35#define I2C_ADDR_RTC (0x0C >> 1)
36#define I2C_ADDR_HAPTIC (0x90 >> 1)
37
38static struct mfd_cell max8997_devs[] = {
39 { .name = "max8997-pmic", },
40 { .name = "max8997-rtc", },
41 { .name = "max8997-battery", },
42 { .name = "max8997-haptic", },
43 { .name = "max8997-muic", },
44 { .name = "max8997-flash", },
45};
46
47int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
48{
49 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
50 int ret;
51
52 mutex_lock(&max8997->iolock);
53 ret = i2c_smbus_read_byte_data(i2c, reg);
54 mutex_unlock(&max8997->iolock);
55 if (ret < 0)
56 return ret;
57
58 ret &= 0xff;
59 *dest = ret;
60 return 0;
61}
62EXPORT_SYMBOL_GPL(max8997_read_reg);
63
64int max8997_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
65{
66 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
67 int ret;
68
69 mutex_lock(&max8997->iolock);
70 ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
71 mutex_unlock(&max8997->iolock);
72 if (ret < 0)
73 return ret;
74
75 return 0;
76}
77EXPORT_SYMBOL_GPL(max8997_bulk_read);
78
79int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
80{
81 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
82 int ret;
83
84 mutex_lock(&max8997->iolock);
85 ret = i2c_smbus_write_byte_data(i2c, reg, value);
86 mutex_unlock(&max8997->iolock);
87 return ret;
88}
89EXPORT_SYMBOL_GPL(max8997_write_reg);
90
91int max8997_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
92{
93 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
94 int ret;
95
96 mutex_lock(&max8997->iolock);
97 ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
98 mutex_unlock(&max8997->iolock);
99 if (ret < 0)
100 return ret;
101
102 return 0;
103}
104EXPORT_SYMBOL_GPL(max8997_bulk_write);
105
106int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
107{
108 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
109 int ret;
110
111 mutex_lock(&max8997->iolock);
112 ret = i2c_smbus_read_byte_data(i2c, reg);
113 if (ret >= 0) {
114 u8 old_val = ret & 0xff;
115 u8 new_val = (val & mask) | (old_val & (~mask));
116 ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
117 }
118 mutex_unlock(&max8997->iolock);
119 return ret;
120}
121EXPORT_SYMBOL_GPL(max8997_update_reg);
122
123static int max8997_i2c_probe(struct i2c_client *i2c,
124 const struct i2c_device_id *id)
125{
126 struct max8997_dev *max8997;
127 struct max8997_platform_data *pdata = i2c->dev.platform_data;
128 int ret = 0;
129
130 max8997 = kzalloc(sizeof(struct max8997_dev), GFP_KERNEL);
131 if (max8997 == NULL)
132 return -ENOMEM;
133
134 i2c_set_clientdata(i2c, max8997);
135 max8997->dev = &i2c->dev;
136 max8997->i2c = i2c;
137 max8997->type = id->driver_data;
138
139 if (!pdata)
140 goto err;
141
142 max8997->wakeup = pdata->wakeup;
143
144 mutex_init(&max8997->iolock);
145
146 max8997->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
147 i2c_set_clientdata(max8997->rtc, max8997);
148 max8997->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
149 i2c_set_clientdata(max8997->haptic, max8997);
150 max8997->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
151 i2c_set_clientdata(max8997->muic, max8997);
152
153 pm_runtime_set_active(max8997->dev);
154
155 mfd_add_devices(max8997->dev, -1, max8997_devs,
156 ARRAY_SIZE(max8997_devs),
157 NULL, 0);
158
159 /*
160 * TODO: enable others (flash, muic, rtc, battery, ...) and
161 * check the return value
162 */
163
164 if (ret < 0)
165 goto err_mfd;
166
167 return ret;
168
169err_mfd:
170 mfd_remove_devices(max8997->dev);
171 i2c_unregister_device(max8997->muic);
172 i2c_unregister_device(max8997->haptic);
173 i2c_unregister_device(max8997->rtc);
174err:
175 kfree(max8997);
176 return ret;
177}
178
179static int max8997_i2c_remove(struct i2c_client *i2c)
180{
181 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
182
183 mfd_remove_devices(max8997->dev);
184 i2c_unregister_device(max8997->muic);
185 i2c_unregister_device(max8997->haptic);
186 i2c_unregister_device(max8997->rtc);
187 kfree(max8997);
188
189 return 0;
190}
191
192static const struct i2c_device_id max8997_i2c_id[] = {
193 { "max8997", TYPE_MAX8997 },
194 { "max8966", TYPE_MAX8966 },
195 { }
196};
197MODULE_DEVICE_TABLE(i2c, max8998_i2c_id);
198
199u8 max8997_dumpaddr_pmic[] = {
200 MAX8997_REG_INT1MSK,
201 MAX8997_REG_INT2MSK,
202 MAX8997_REG_INT3MSK,
203 MAX8997_REG_INT4MSK,
204 MAX8997_REG_MAINCON1,
205 MAX8997_REG_MAINCON2,
206 MAX8997_REG_BUCKRAMP,
207 MAX8997_REG_BUCK1CTRL,
208 MAX8997_REG_BUCK1DVS1,
209 MAX8997_REG_BUCK1DVS2,
210 MAX8997_REG_BUCK1DVS3,
211 MAX8997_REG_BUCK1DVS4,
212 MAX8997_REG_BUCK1DVS5,
213 MAX8997_REG_BUCK1DVS6,
214 MAX8997_REG_BUCK1DVS7,
215 MAX8997_REG_BUCK1DVS8,
216 MAX8997_REG_BUCK2CTRL,
217 MAX8997_REG_BUCK2DVS1,
218 MAX8997_REG_BUCK2DVS2,
219 MAX8997_REG_BUCK2DVS3,
220 MAX8997_REG_BUCK2DVS4,
221 MAX8997_REG_BUCK2DVS5,
222 MAX8997_REG_BUCK2DVS6,
223 MAX8997_REG_BUCK2DVS7,
224 MAX8997_REG_BUCK2DVS8,
225 MAX8997_REG_BUCK3CTRL,
226 MAX8997_REG_BUCK3DVS,
227 MAX8997_REG_BUCK4CTRL,
228 MAX8997_REG_BUCK4DVS,
229 MAX8997_REG_BUCK5CTRL,
230 MAX8997_REG_BUCK5DVS1,
231 MAX8997_REG_BUCK5DVS2,
232 MAX8997_REG_BUCK5DVS3,
233 MAX8997_REG_BUCK5DVS4,
234 MAX8997_REG_BUCK5DVS5,
235 MAX8997_REG_BUCK5DVS6,
236 MAX8997_REG_BUCK5DVS7,
237 MAX8997_REG_BUCK5DVS8,
238 MAX8997_REG_BUCK6CTRL,
239 MAX8997_REG_BUCK6BPSKIPCTRL,
240 MAX8997_REG_BUCK7CTRL,
241 MAX8997_REG_BUCK7DVS,
242 MAX8997_REG_LDO1CTRL,
243 MAX8997_REG_LDO2CTRL,
244 MAX8997_REG_LDO3CTRL,
245 MAX8997_REG_LDO4CTRL,
246 MAX8997_REG_LDO5CTRL,
247 MAX8997_REG_LDO6CTRL,
248 MAX8997_REG_LDO7CTRL,
249 MAX8997_REG_LDO8CTRL,
250 MAX8997_REG_LDO9CTRL,
251 MAX8997_REG_LDO10CTRL,
252 MAX8997_REG_LDO11CTRL,
253 MAX8997_REG_LDO12CTRL,
254 MAX8997_REG_LDO13CTRL,
255 MAX8997_REG_LDO14CTRL,
256 MAX8997_REG_LDO15CTRL,
257 MAX8997_REG_LDO16CTRL,
258 MAX8997_REG_LDO17CTRL,
259 MAX8997_REG_LDO18CTRL,
260 MAX8997_REG_LDO21CTRL,
261 MAX8997_REG_MBCCTRL1,
262 MAX8997_REG_MBCCTRL2,
263 MAX8997_REG_MBCCTRL3,
264 MAX8997_REG_MBCCTRL4,
265 MAX8997_REG_MBCCTRL5,
266 MAX8997_REG_MBCCTRL6,
267 MAX8997_REG_OTPCGHCVS,
268 MAX8997_REG_SAFEOUTCTRL,
269 MAX8997_REG_LBCNFG1,
270 MAX8997_REG_LBCNFG2,
271 MAX8997_REG_BBCCTRL,
272
273 MAX8997_REG_FLASH1_CUR,
274 MAX8997_REG_FLASH2_CUR,
275 MAX8997_REG_MOVIE_CUR,
276 MAX8997_REG_GSMB_CUR,
277 MAX8997_REG_BOOST_CNTL,
278 MAX8997_REG_LEN_CNTL,
279 MAX8997_REG_FLASH_CNTL,
280 MAX8997_REG_WDT_CNTL,
281 MAX8997_REG_MAXFLASH1,
282 MAX8997_REG_MAXFLASH2,
283 MAX8997_REG_FLASHSTATUSMASK,
284
285 MAX8997_REG_GPIOCNTL1,
286 MAX8997_REG_GPIOCNTL2,
287 MAX8997_REG_GPIOCNTL3,
288 MAX8997_REG_GPIOCNTL4,
289 MAX8997_REG_GPIOCNTL5,
290 MAX8997_REG_GPIOCNTL6,
291 MAX8997_REG_GPIOCNTL7,
292 MAX8997_REG_GPIOCNTL8,
293 MAX8997_REG_GPIOCNTL9,
294 MAX8997_REG_GPIOCNTL10,
295 MAX8997_REG_GPIOCNTL11,
296 MAX8997_REG_GPIOCNTL12,
297
298 MAX8997_REG_LDO1CONFIG,
299 MAX8997_REG_LDO2CONFIG,
300 MAX8997_REG_LDO3CONFIG,
301 MAX8997_REG_LDO4CONFIG,
302 MAX8997_REG_LDO5CONFIG,
303 MAX8997_REG_LDO6CONFIG,
304 MAX8997_REG_LDO7CONFIG,
305 MAX8997_REG_LDO8CONFIG,
306 MAX8997_REG_LDO9CONFIG,
307 MAX8997_REG_LDO10CONFIG,
308 MAX8997_REG_LDO11CONFIG,
309 MAX8997_REG_LDO12CONFIG,
310 MAX8997_REG_LDO13CONFIG,
311 MAX8997_REG_LDO14CONFIG,
312 MAX8997_REG_LDO15CONFIG,
313 MAX8997_REG_LDO16CONFIG,
314 MAX8997_REG_LDO17CONFIG,
315 MAX8997_REG_LDO18CONFIG,
316 MAX8997_REG_LDO21CONFIG,
317
318 MAX8997_REG_DVSOKTIMER1,
319 MAX8997_REG_DVSOKTIMER2,
320 MAX8997_REG_DVSOKTIMER4,
321 MAX8997_REG_DVSOKTIMER5,
322};
323
324u8 max8997_dumpaddr_muic[] = {
325 MAX8997_MUIC_REG_INTMASK1,
326 MAX8997_MUIC_REG_INTMASK2,
327 MAX8997_MUIC_REG_INTMASK3,
328 MAX8997_MUIC_REG_CDETCTRL,
329 MAX8997_MUIC_REG_CONTROL1,
330 MAX8997_MUIC_REG_CONTROL2,
331 MAX8997_MUIC_REG_CONTROL3,
332};
333
334u8 max8997_dumpaddr_haptic[] = {
335 MAX8997_HAPTIC_REG_CONF1,
336 MAX8997_HAPTIC_REG_CONF2,
337 MAX8997_HAPTIC_REG_DRVCONF,
338 MAX8997_HAPTIC_REG_CYCLECONF1,
339 MAX8997_HAPTIC_REG_CYCLECONF2,
340 MAX8997_HAPTIC_REG_SIGCONF1,
341 MAX8997_HAPTIC_REG_SIGCONF2,
342 MAX8997_HAPTIC_REG_SIGCONF3,
343 MAX8997_HAPTIC_REG_SIGCONF4,
344 MAX8997_HAPTIC_REG_SIGDC1,
345 MAX8997_HAPTIC_REG_SIGDC2,
346 MAX8997_HAPTIC_REG_SIGPWMDC1,
347 MAX8997_HAPTIC_REG_SIGPWMDC2,
348 MAX8997_HAPTIC_REG_SIGPWMDC3,
349 MAX8997_HAPTIC_REG_SIGPWMDC4,
350};
351
352static int max8997_freeze(struct device *dev)
353{
354 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
355 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
356 int i;
357
358 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
359 max8997_read_reg(i2c, max8997_dumpaddr_pmic[i],
360 &max8997->reg_dump[i]);
361
362 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
363 max8997_read_reg(i2c, max8997_dumpaddr_muic[i],
364 &max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
365
366 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
367 max8997_read_reg(i2c, max8997_dumpaddr_haptic[i],
368 &max8997->reg_dump[i + MAX8997_REG_PMIC_END +
369 MAX8997_MUIC_REG_END]);
370
371 return 0;
372}
373
374static int max8997_restore(struct device *dev)
375{
376 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
377 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
378 int i;
379
380 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
381 max8997_write_reg(i2c, max8997_dumpaddr_pmic[i],
382 max8997->reg_dump[i]);
383
384 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
385 max8997_write_reg(i2c, max8997_dumpaddr_muic[i],
386 max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
387
388 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
389 max8997_write_reg(i2c, max8997_dumpaddr_haptic[i],
390 max8997->reg_dump[i + MAX8997_REG_PMIC_END +
391 MAX8997_MUIC_REG_END]);
392
393 return 0;
394}
395
396const struct dev_pm_ops max8997_pm = {
397 .freeze = max8997_freeze,
398 .restore = max8997_restore,
399};
400
401static struct i2c_driver max8997_i2c_driver = {
402 .driver = {
403 .name = "max8997",
404 .owner = THIS_MODULE,
405 .pm = &max8997_pm,
406 },
407 .probe = max8997_i2c_probe,
408 .remove = max8997_i2c_remove,
409 .id_table = max8997_i2c_id,
410};
411
412static int __init max8997_i2c_init(void)
413{
414 return i2c_add_driver(&max8997_i2c_driver);
415}
416/* init early so consumer devices can complete system boot */
417subsys_initcall(max8997_i2c_init);
418
419static void __exit max8997_i2c_exit(void)
420{
421 i2c_del_driver(&max8997_i2c_driver);
422}
423module_exit(max8997_i2c_exit);
424
425MODULE_DESCRIPTION("MAXIM 8997 multi-function core driver");
426MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
427MODULE_LICENSE("GPL");