2 * max8997.c - mfd core driver for the Maxim 8966 and 8997
4 * Copyright (C) 2011 Samsung Electronics
5 * MyungJoo Ham <myungjoo.ham@smasung.com>
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.
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.
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
21 * This driver is based on max8998.c
24 #include <linux/slab.h>
25 #include <linux/i2c.h>
26 #include <linux/interrupt.h>
27 #include <linux/pm_runtime.h>
28 #include <linux/module.h>
29 #include <linux/mutex.h>
30 #include <linux/mfd/core.h>
31 #include <linux/mfd/max8997.h>
32 #include <linux/mfd/max8997-private.h>
34 #define I2C_ADDR_PMIC (0xCC >> 1)
35 #define I2C_ADDR_MUIC (0x4A >> 1)
36 #define I2C_ADDR_BATTERY (0x6C >> 1)
37 #define I2C_ADDR_RTC (0x0C >> 1)
38 #define I2C_ADDR_HAPTIC (0x90 >> 1)
40 static struct mfd_cell max8997_devs[] = {
41 { .name = "max8997-pmic", },
42 { .name = "max8997-rtc", },
43 { .name = "max8997-battery", },
44 { .name = "max8997-haptic", },
45 { .name = "max8997-muic", },
46 { .name = "max8997-flash", },
49 int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
51 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
54 mutex_lock(&max8997->iolock);
55 ret = i2c_smbus_read_byte_data(i2c, reg);
56 mutex_unlock(&max8997->iolock);
64 EXPORT_SYMBOL_GPL(max8997_read_reg);
66 int max8997_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
68 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
71 mutex_lock(&max8997->iolock);
72 ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
73 mutex_unlock(&max8997->iolock);
79 EXPORT_SYMBOL_GPL(max8997_bulk_read);
81 int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
83 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
86 mutex_lock(&max8997->iolock);
87 ret = i2c_smbus_write_byte_data(i2c, reg, value);
88 mutex_unlock(&max8997->iolock);
91 EXPORT_SYMBOL_GPL(max8997_write_reg);
93 int max8997_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
95 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
98 mutex_lock(&max8997->iolock);
99 ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
100 mutex_unlock(&max8997->iolock);
106 EXPORT_SYMBOL_GPL(max8997_bulk_write);
108 int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
110 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
113 mutex_lock(&max8997->iolock);
114 ret = i2c_smbus_read_byte_data(i2c, reg);
116 u8 old_val = ret & 0xff;
117 u8 new_val = (val & mask) | (old_val & (~mask));
118 ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
120 mutex_unlock(&max8997->iolock);
123 EXPORT_SYMBOL_GPL(max8997_update_reg);
125 static int max8997_i2c_probe(struct i2c_client *i2c,
126 const struct i2c_device_id *id)
128 struct max8997_dev *max8997;
129 struct max8997_platform_data *pdata = i2c->dev.platform_data;
132 max8997 = kzalloc(sizeof(struct max8997_dev), GFP_KERNEL);
136 i2c_set_clientdata(i2c, max8997);
137 max8997->dev = &i2c->dev;
139 max8997->type = id->driver_data;
140 max8997->irq = i2c->irq;
145 max8997->irq_base = pdata->irq_base;
146 max8997->ono = pdata->ono;
148 mutex_init(&max8997->iolock);
150 max8997->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
152 dev_err(max8997->dev, "Failed to allocate I2C device for RTC\n");
155 i2c_set_clientdata(max8997->rtc, max8997);
157 max8997->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
158 if (!max8997->haptic) {
159 dev_err(max8997->dev, "Failed to allocate I2C device for Haptic\n");
163 i2c_set_clientdata(max8997->haptic, max8997);
165 max8997->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
166 if (!max8997->muic) {
167 dev_err(max8997->dev, "Failed to allocate I2C device for MUIC\n");
171 i2c_set_clientdata(max8997->muic, max8997);
173 pm_runtime_set_active(max8997->dev);
175 max8997_irq_init(max8997);
177 mfd_add_devices(max8997->dev, -1, max8997_devs,
178 ARRAY_SIZE(max8997_devs),
182 * TODO: enable others (flash, muic, rtc, battery, ...) and
183 * check the return value
189 /* MAX8997 has a power button input. */
190 device_init_wakeup(max8997->dev, pdata->wakeup);
195 mfd_remove_devices(max8997->dev);
196 i2c_unregister_device(max8997->muic);
198 i2c_unregister_device(max8997->haptic);
200 i2c_unregister_device(max8997->rtc);
206 static int max8997_i2c_remove(struct i2c_client *i2c)
208 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
210 mfd_remove_devices(max8997->dev);
211 i2c_unregister_device(max8997->muic);
212 i2c_unregister_device(max8997->haptic);
213 i2c_unregister_device(max8997->rtc);
219 static const struct i2c_device_id max8997_i2c_id[] = {
220 { "max8997", TYPE_MAX8997 },
221 { "max8966", TYPE_MAX8966 },
224 MODULE_DEVICE_TABLE(i2c, max8998_i2c_id);
226 u8 max8997_dumpaddr_pmic[] = {
231 MAX8997_REG_MAINCON1,
232 MAX8997_REG_MAINCON2,
233 MAX8997_REG_BUCKRAMP,
234 MAX8997_REG_BUCK1CTRL,
235 MAX8997_REG_BUCK1DVS1,
236 MAX8997_REG_BUCK1DVS2,
237 MAX8997_REG_BUCK1DVS3,
238 MAX8997_REG_BUCK1DVS4,
239 MAX8997_REG_BUCK1DVS5,
240 MAX8997_REG_BUCK1DVS6,
241 MAX8997_REG_BUCK1DVS7,
242 MAX8997_REG_BUCK1DVS8,
243 MAX8997_REG_BUCK2CTRL,
244 MAX8997_REG_BUCK2DVS1,
245 MAX8997_REG_BUCK2DVS2,
246 MAX8997_REG_BUCK2DVS3,
247 MAX8997_REG_BUCK2DVS4,
248 MAX8997_REG_BUCK2DVS5,
249 MAX8997_REG_BUCK2DVS6,
250 MAX8997_REG_BUCK2DVS7,
251 MAX8997_REG_BUCK2DVS8,
252 MAX8997_REG_BUCK3CTRL,
253 MAX8997_REG_BUCK3DVS,
254 MAX8997_REG_BUCK4CTRL,
255 MAX8997_REG_BUCK4DVS,
256 MAX8997_REG_BUCK5CTRL,
257 MAX8997_REG_BUCK5DVS1,
258 MAX8997_REG_BUCK5DVS2,
259 MAX8997_REG_BUCK5DVS3,
260 MAX8997_REG_BUCK5DVS4,
261 MAX8997_REG_BUCK5DVS5,
262 MAX8997_REG_BUCK5DVS6,
263 MAX8997_REG_BUCK5DVS7,
264 MAX8997_REG_BUCK5DVS8,
265 MAX8997_REG_BUCK6CTRL,
266 MAX8997_REG_BUCK6BPSKIPCTRL,
267 MAX8997_REG_BUCK7CTRL,
268 MAX8997_REG_BUCK7DVS,
269 MAX8997_REG_LDO1CTRL,
270 MAX8997_REG_LDO2CTRL,
271 MAX8997_REG_LDO3CTRL,
272 MAX8997_REG_LDO4CTRL,
273 MAX8997_REG_LDO5CTRL,
274 MAX8997_REG_LDO6CTRL,
275 MAX8997_REG_LDO7CTRL,
276 MAX8997_REG_LDO8CTRL,
277 MAX8997_REG_LDO9CTRL,
278 MAX8997_REG_LDO10CTRL,
279 MAX8997_REG_LDO11CTRL,
280 MAX8997_REG_LDO12CTRL,
281 MAX8997_REG_LDO13CTRL,
282 MAX8997_REG_LDO14CTRL,
283 MAX8997_REG_LDO15CTRL,
284 MAX8997_REG_LDO16CTRL,
285 MAX8997_REG_LDO17CTRL,
286 MAX8997_REG_LDO18CTRL,
287 MAX8997_REG_LDO21CTRL,
288 MAX8997_REG_MBCCTRL1,
289 MAX8997_REG_MBCCTRL2,
290 MAX8997_REG_MBCCTRL3,
291 MAX8997_REG_MBCCTRL4,
292 MAX8997_REG_MBCCTRL5,
293 MAX8997_REG_MBCCTRL6,
294 MAX8997_REG_OTPCGHCVS,
295 MAX8997_REG_SAFEOUTCTRL,
300 MAX8997_REG_FLASH1_CUR,
301 MAX8997_REG_FLASH2_CUR,
302 MAX8997_REG_MOVIE_CUR,
303 MAX8997_REG_GSMB_CUR,
304 MAX8997_REG_BOOST_CNTL,
305 MAX8997_REG_LEN_CNTL,
306 MAX8997_REG_FLASH_CNTL,
307 MAX8997_REG_WDT_CNTL,
308 MAX8997_REG_MAXFLASH1,
309 MAX8997_REG_MAXFLASH2,
310 MAX8997_REG_FLASHSTATUSMASK,
312 MAX8997_REG_GPIOCNTL1,
313 MAX8997_REG_GPIOCNTL2,
314 MAX8997_REG_GPIOCNTL3,
315 MAX8997_REG_GPIOCNTL4,
316 MAX8997_REG_GPIOCNTL5,
317 MAX8997_REG_GPIOCNTL6,
318 MAX8997_REG_GPIOCNTL7,
319 MAX8997_REG_GPIOCNTL8,
320 MAX8997_REG_GPIOCNTL9,
321 MAX8997_REG_GPIOCNTL10,
322 MAX8997_REG_GPIOCNTL11,
323 MAX8997_REG_GPIOCNTL12,
325 MAX8997_REG_LDO1CONFIG,
326 MAX8997_REG_LDO2CONFIG,
327 MAX8997_REG_LDO3CONFIG,
328 MAX8997_REG_LDO4CONFIG,
329 MAX8997_REG_LDO5CONFIG,
330 MAX8997_REG_LDO6CONFIG,
331 MAX8997_REG_LDO7CONFIG,
332 MAX8997_REG_LDO8CONFIG,
333 MAX8997_REG_LDO9CONFIG,
334 MAX8997_REG_LDO10CONFIG,
335 MAX8997_REG_LDO11CONFIG,
336 MAX8997_REG_LDO12CONFIG,
337 MAX8997_REG_LDO13CONFIG,
338 MAX8997_REG_LDO14CONFIG,
339 MAX8997_REG_LDO15CONFIG,
340 MAX8997_REG_LDO16CONFIG,
341 MAX8997_REG_LDO17CONFIG,
342 MAX8997_REG_LDO18CONFIG,
343 MAX8997_REG_LDO21CONFIG,
345 MAX8997_REG_DVSOKTIMER1,
346 MAX8997_REG_DVSOKTIMER2,
347 MAX8997_REG_DVSOKTIMER4,
348 MAX8997_REG_DVSOKTIMER5,
351 u8 max8997_dumpaddr_muic[] = {
352 MAX8997_MUIC_REG_INTMASK1,
353 MAX8997_MUIC_REG_INTMASK2,
354 MAX8997_MUIC_REG_INTMASK3,
355 MAX8997_MUIC_REG_CDETCTRL,
356 MAX8997_MUIC_REG_CONTROL1,
357 MAX8997_MUIC_REG_CONTROL2,
358 MAX8997_MUIC_REG_CONTROL3,
361 u8 max8997_dumpaddr_haptic[] = {
362 MAX8997_HAPTIC_REG_CONF1,
363 MAX8997_HAPTIC_REG_CONF2,
364 MAX8997_HAPTIC_REG_DRVCONF,
365 MAX8997_HAPTIC_REG_CYCLECONF1,
366 MAX8997_HAPTIC_REG_CYCLECONF2,
367 MAX8997_HAPTIC_REG_SIGCONF1,
368 MAX8997_HAPTIC_REG_SIGCONF2,
369 MAX8997_HAPTIC_REG_SIGCONF3,
370 MAX8997_HAPTIC_REG_SIGCONF4,
371 MAX8997_HAPTIC_REG_SIGDC1,
372 MAX8997_HAPTIC_REG_SIGDC2,
373 MAX8997_HAPTIC_REG_SIGPWMDC1,
374 MAX8997_HAPTIC_REG_SIGPWMDC2,
375 MAX8997_HAPTIC_REG_SIGPWMDC3,
376 MAX8997_HAPTIC_REG_SIGPWMDC4,
379 static int max8997_freeze(struct device *dev)
381 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
382 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
385 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
386 max8997_read_reg(i2c, max8997_dumpaddr_pmic[i],
387 &max8997->reg_dump[i]);
389 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
390 max8997_read_reg(i2c, max8997_dumpaddr_muic[i],
391 &max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
393 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
394 max8997_read_reg(i2c, max8997_dumpaddr_haptic[i],
395 &max8997->reg_dump[i + MAX8997_REG_PMIC_END +
396 MAX8997_MUIC_REG_END]);
401 static int max8997_restore(struct device *dev)
403 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
404 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
407 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
408 max8997_write_reg(i2c, max8997_dumpaddr_pmic[i],
409 max8997->reg_dump[i]);
411 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
412 max8997_write_reg(i2c, max8997_dumpaddr_muic[i],
413 max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
415 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
416 max8997_write_reg(i2c, max8997_dumpaddr_haptic[i],
417 max8997->reg_dump[i + MAX8997_REG_PMIC_END +
418 MAX8997_MUIC_REG_END]);
423 static int max8997_suspend(struct device *dev)
425 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
426 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
428 if (device_may_wakeup(dev))
429 irq_set_irq_wake(max8997->irq, 1);
433 static int max8997_resume(struct device *dev)
435 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
436 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
438 if (device_may_wakeup(dev))
439 irq_set_irq_wake(max8997->irq, 0);
440 return max8997_irq_resume(max8997);
443 const struct dev_pm_ops max8997_pm = {
444 .suspend = max8997_suspend,
445 .resume = max8997_resume,
446 .freeze = max8997_freeze,
447 .restore = max8997_restore,
450 static struct i2c_driver max8997_i2c_driver = {
453 .owner = THIS_MODULE,
456 .probe = max8997_i2c_probe,
457 .remove = max8997_i2c_remove,
458 .id_table = max8997_i2c_id,
461 static int __init max8997_i2c_init(void)
463 return i2c_add_driver(&max8997_i2c_driver);
465 /* init early so consumer devices can complete system boot */
466 subsys_initcall(max8997_i2c_init);
468 static void __exit max8997_i2c_exit(void)
470 i2c_del_driver(&max8997_i2c_driver);
472 module_exit(max8997_i2c_exit);
474 MODULE_DESCRIPTION("MAXIM 8997 multi-function core driver");
475 MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
476 MODULE_LICENSE("GPL");