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10#include <linux/err.h>
11#include <linux/slab.h>
12#include <linux/i2c.h>
13#include <linux/of.h>
14#include <linux/of_device.h>
15#include <linux/of_irq.h>
16#include <linux/interrupt.h>
17#include <linux/pm_runtime.h>
18#include <linux/init.h>
19#include <linux/mutex.h>
20#include <linux/mfd/core.h>
21#include <linux/mfd/max8997.h>
22#include <linux/mfd/max8997-private.h>
23
24#define I2C_ADDR_PMIC (0xCC >> 1)
25#define I2C_ADDR_MUIC (0x4A >> 1)
26#define I2C_ADDR_BATTERY (0x6C >> 1)
27#define I2C_ADDR_RTC (0x0C >> 1)
28#define I2C_ADDR_HAPTIC (0x90 >> 1)
29
30static const struct mfd_cell max8997_devs[] = {
31 { .name = "max8997-pmic", },
32 { .name = "max8997-rtc", },
33 { .name = "max8997-battery", },
34 { .name = "max8997-haptic", },
35 { .name = "max8997-muic", },
36 { .name = "max8997-led", .id = 1 },
37 { .name = "max8997-led", .id = 2 },
38};
39
40#ifdef CONFIG_OF
41static const struct of_device_id max8997_pmic_dt_match[] = {
42 { .compatible = "maxim,max8997-pmic", .data = (void *)TYPE_MAX8997 },
43 {},
44};
45#endif
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
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130
131
132static struct max8997_platform_data *max8997_i2c_parse_dt_pdata(
133 struct device *dev)
134{
135 struct max8997_platform_data *pd;
136
137 pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
138 if (!pd)
139 return ERR_PTR(-ENOMEM);
140
141 pd->ono = irq_of_parse_and_map(dev->of_node, 1);
142
143 return pd;
144}
145
146static inline unsigned long max8997_i2c_get_driver_data(struct i2c_client *i2c,
147 const struct i2c_device_id *id)
148{
149 if (i2c->dev.of_node)
150 return (unsigned long)of_device_get_match_data(&i2c->dev);
151
152 return id->driver_data;
153}
154
155static int max8997_i2c_probe(struct i2c_client *i2c,
156 const struct i2c_device_id *id)
157{
158 struct max8997_dev *max8997;
159 struct max8997_platform_data *pdata = dev_get_platdata(&i2c->dev);
160 int ret = 0;
161
162 max8997 = devm_kzalloc(&i2c->dev, sizeof(struct max8997_dev),
163 GFP_KERNEL);
164 if (max8997 == NULL)
165 return -ENOMEM;
166
167 i2c_set_clientdata(i2c, max8997);
168 max8997->dev = &i2c->dev;
169 max8997->i2c = i2c;
170 max8997->type = max8997_i2c_get_driver_data(i2c, id);
171 max8997->irq = i2c->irq;
172
173 if (IS_ENABLED(CONFIG_OF) && max8997->dev->of_node) {
174 pdata = max8997_i2c_parse_dt_pdata(max8997->dev);
175 if (IS_ERR(pdata))
176 return PTR_ERR(pdata);
177 }
178
179 if (!pdata)
180 return ret;
181
182 max8997->pdata = pdata;
183 max8997->ono = pdata->ono;
184
185 mutex_init(&max8997->iolock);
186
187 max8997->rtc = i2c_new_dummy_device(i2c->adapter, I2C_ADDR_RTC);
188 if (IS_ERR(max8997->rtc)) {
189 dev_err(max8997->dev, "Failed to allocate I2C device for RTC\n");
190 return PTR_ERR(max8997->rtc);
191 }
192 i2c_set_clientdata(max8997->rtc, max8997);
193
194 max8997->haptic = i2c_new_dummy_device(i2c->adapter, I2C_ADDR_HAPTIC);
195 if (IS_ERR(max8997->haptic)) {
196 dev_err(max8997->dev, "Failed to allocate I2C device for Haptic\n");
197 ret = PTR_ERR(max8997->haptic);
198 goto err_i2c_haptic;
199 }
200 i2c_set_clientdata(max8997->haptic, max8997);
201
202 max8997->muic = i2c_new_dummy_device(i2c->adapter, I2C_ADDR_MUIC);
203 if (IS_ERR(max8997->muic)) {
204 dev_err(max8997->dev, "Failed to allocate I2C device for MUIC\n");
205 ret = PTR_ERR(max8997->muic);
206 goto err_i2c_muic;
207 }
208 i2c_set_clientdata(max8997->muic, max8997);
209
210 pm_runtime_set_active(max8997->dev);
211
212 max8997_irq_init(max8997);
213
214 ret = mfd_add_devices(max8997->dev, -1, max8997_devs,
215 ARRAY_SIZE(max8997_devs),
216 NULL, 0, NULL);
217 if (ret < 0) {
218 dev_err(max8997->dev, "failed to add MFD devices %d\n", ret);
219 goto err_mfd;
220 }
221
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225
226
227
228 device_init_wakeup(max8997->dev, true);
229
230 return ret;
231
232err_mfd:
233 mfd_remove_devices(max8997->dev);
234 i2c_unregister_device(max8997->muic);
235err_i2c_muic:
236 i2c_unregister_device(max8997->haptic);
237err_i2c_haptic:
238 i2c_unregister_device(max8997->rtc);
239 return ret;
240}
241
242static const struct i2c_device_id max8997_i2c_id[] = {
243 { "max8997", TYPE_MAX8997 },
244 { "max8966", TYPE_MAX8966 },
245 { }
246};
247
248static u8 max8997_dumpaddr_pmic[] = {
249 MAX8997_REG_INT1MSK,
250 MAX8997_REG_INT2MSK,
251 MAX8997_REG_INT3MSK,
252 MAX8997_REG_INT4MSK,
253 MAX8997_REG_MAINCON1,
254 MAX8997_REG_MAINCON2,
255 MAX8997_REG_BUCKRAMP,
256 MAX8997_REG_BUCK1CTRL,
257 MAX8997_REG_BUCK1DVS1,
258 MAX8997_REG_BUCK1DVS2,
259 MAX8997_REG_BUCK1DVS3,
260 MAX8997_REG_BUCK1DVS4,
261 MAX8997_REG_BUCK1DVS5,
262 MAX8997_REG_BUCK1DVS6,
263 MAX8997_REG_BUCK1DVS7,
264 MAX8997_REG_BUCK1DVS8,
265 MAX8997_REG_BUCK2CTRL,
266 MAX8997_REG_BUCK2DVS1,
267 MAX8997_REG_BUCK2DVS2,
268 MAX8997_REG_BUCK2DVS3,
269 MAX8997_REG_BUCK2DVS4,
270 MAX8997_REG_BUCK2DVS5,
271 MAX8997_REG_BUCK2DVS6,
272 MAX8997_REG_BUCK2DVS7,
273 MAX8997_REG_BUCK2DVS8,
274 MAX8997_REG_BUCK3CTRL,
275 MAX8997_REG_BUCK3DVS,
276 MAX8997_REG_BUCK4CTRL,
277 MAX8997_REG_BUCK4DVS,
278 MAX8997_REG_BUCK5CTRL,
279 MAX8997_REG_BUCK5DVS1,
280 MAX8997_REG_BUCK5DVS2,
281 MAX8997_REG_BUCK5DVS3,
282 MAX8997_REG_BUCK5DVS4,
283 MAX8997_REG_BUCK5DVS5,
284 MAX8997_REG_BUCK5DVS6,
285 MAX8997_REG_BUCK5DVS7,
286 MAX8997_REG_BUCK5DVS8,
287 MAX8997_REG_BUCK6CTRL,
288 MAX8997_REG_BUCK6BPSKIPCTRL,
289 MAX8997_REG_BUCK7CTRL,
290 MAX8997_REG_BUCK7DVS,
291 MAX8997_REG_LDO1CTRL,
292 MAX8997_REG_LDO2CTRL,
293 MAX8997_REG_LDO3CTRL,
294 MAX8997_REG_LDO4CTRL,
295 MAX8997_REG_LDO5CTRL,
296 MAX8997_REG_LDO6CTRL,
297 MAX8997_REG_LDO7CTRL,
298 MAX8997_REG_LDO8CTRL,
299 MAX8997_REG_LDO9CTRL,
300 MAX8997_REG_LDO10CTRL,
301 MAX8997_REG_LDO11CTRL,
302 MAX8997_REG_LDO12CTRL,
303 MAX8997_REG_LDO13CTRL,
304 MAX8997_REG_LDO14CTRL,
305 MAX8997_REG_LDO15CTRL,
306 MAX8997_REG_LDO16CTRL,
307 MAX8997_REG_LDO17CTRL,
308 MAX8997_REG_LDO18CTRL,
309 MAX8997_REG_LDO21CTRL,
310 MAX8997_REG_MBCCTRL1,
311 MAX8997_REG_MBCCTRL2,
312 MAX8997_REG_MBCCTRL3,
313 MAX8997_REG_MBCCTRL4,
314 MAX8997_REG_MBCCTRL5,
315 MAX8997_REG_MBCCTRL6,
316 MAX8997_REG_OTPCGHCVS,
317 MAX8997_REG_SAFEOUTCTRL,
318 MAX8997_REG_LBCNFG1,
319 MAX8997_REG_LBCNFG2,
320 MAX8997_REG_BBCCTRL,
321
322 MAX8997_REG_FLASH1_CUR,
323 MAX8997_REG_FLASH2_CUR,
324 MAX8997_REG_MOVIE_CUR,
325 MAX8997_REG_GSMB_CUR,
326 MAX8997_REG_BOOST_CNTL,
327 MAX8997_REG_LEN_CNTL,
328 MAX8997_REG_FLASH_CNTL,
329 MAX8997_REG_WDT_CNTL,
330 MAX8997_REG_MAXFLASH1,
331 MAX8997_REG_MAXFLASH2,
332 MAX8997_REG_FLASHSTATUSMASK,
333
334 MAX8997_REG_GPIOCNTL1,
335 MAX8997_REG_GPIOCNTL2,
336 MAX8997_REG_GPIOCNTL3,
337 MAX8997_REG_GPIOCNTL4,
338 MAX8997_REG_GPIOCNTL5,
339 MAX8997_REG_GPIOCNTL6,
340 MAX8997_REG_GPIOCNTL7,
341 MAX8997_REG_GPIOCNTL8,
342 MAX8997_REG_GPIOCNTL9,
343 MAX8997_REG_GPIOCNTL10,
344 MAX8997_REG_GPIOCNTL11,
345 MAX8997_REG_GPIOCNTL12,
346
347 MAX8997_REG_LDO1CONFIG,
348 MAX8997_REG_LDO2CONFIG,
349 MAX8997_REG_LDO3CONFIG,
350 MAX8997_REG_LDO4CONFIG,
351 MAX8997_REG_LDO5CONFIG,
352 MAX8997_REG_LDO6CONFIG,
353 MAX8997_REG_LDO7CONFIG,
354 MAX8997_REG_LDO8CONFIG,
355 MAX8997_REG_LDO9CONFIG,
356 MAX8997_REG_LDO10CONFIG,
357 MAX8997_REG_LDO11CONFIG,
358 MAX8997_REG_LDO12CONFIG,
359 MAX8997_REG_LDO13CONFIG,
360 MAX8997_REG_LDO14CONFIG,
361 MAX8997_REG_LDO15CONFIG,
362 MAX8997_REG_LDO16CONFIG,
363 MAX8997_REG_LDO17CONFIG,
364 MAX8997_REG_LDO18CONFIG,
365 MAX8997_REG_LDO21CONFIG,
366
367 MAX8997_REG_DVSOKTIMER1,
368 MAX8997_REG_DVSOKTIMER2,
369 MAX8997_REG_DVSOKTIMER4,
370 MAX8997_REG_DVSOKTIMER5,
371};
372
373static u8 max8997_dumpaddr_muic[] = {
374 MAX8997_MUIC_REG_INTMASK1,
375 MAX8997_MUIC_REG_INTMASK2,
376 MAX8997_MUIC_REG_INTMASK3,
377 MAX8997_MUIC_REG_CDETCTRL,
378 MAX8997_MUIC_REG_CONTROL1,
379 MAX8997_MUIC_REG_CONTROL2,
380 MAX8997_MUIC_REG_CONTROL3,
381};
382
383static u8 max8997_dumpaddr_haptic[] = {
384 MAX8997_HAPTIC_REG_CONF1,
385 MAX8997_HAPTIC_REG_CONF2,
386 MAX8997_HAPTIC_REG_DRVCONF,
387 MAX8997_HAPTIC_REG_CYCLECONF1,
388 MAX8997_HAPTIC_REG_CYCLECONF2,
389 MAX8997_HAPTIC_REG_SIGCONF1,
390 MAX8997_HAPTIC_REG_SIGCONF2,
391 MAX8997_HAPTIC_REG_SIGCONF3,
392 MAX8997_HAPTIC_REG_SIGCONF4,
393 MAX8997_HAPTIC_REG_SIGDC1,
394 MAX8997_HAPTIC_REG_SIGDC2,
395 MAX8997_HAPTIC_REG_SIGPWMDC1,
396 MAX8997_HAPTIC_REG_SIGPWMDC2,
397 MAX8997_HAPTIC_REG_SIGPWMDC3,
398 MAX8997_HAPTIC_REG_SIGPWMDC4,
399};
400
401static int max8997_freeze(struct device *dev)
402{
403 struct i2c_client *i2c = to_i2c_client(dev);
404 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
405 int i;
406
407 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
408 max8997_read_reg(i2c, max8997_dumpaddr_pmic[i],
409 &max8997->reg_dump[i]);
410
411 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
412 max8997_read_reg(i2c, max8997_dumpaddr_muic[i],
413 &max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
414
415 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
416 max8997_read_reg(i2c, max8997_dumpaddr_haptic[i],
417 &max8997->reg_dump[i + MAX8997_REG_PMIC_END +
418 MAX8997_MUIC_REG_END]);
419
420 return 0;
421}
422
423static int max8997_restore(struct device *dev)
424{
425 struct i2c_client *i2c = to_i2c_client(dev);
426 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
427 int i;
428
429 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
430 max8997_write_reg(i2c, max8997_dumpaddr_pmic[i],
431 max8997->reg_dump[i]);
432
433 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
434 max8997_write_reg(i2c, max8997_dumpaddr_muic[i],
435 max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
436
437 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
438 max8997_write_reg(i2c, max8997_dumpaddr_haptic[i],
439 max8997->reg_dump[i + MAX8997_REG_PMIC_END +
440 MAX8997_MUIC_REG_END]);
441
442 return 0;
443}
444
445static int max8997_suspend(struct device *dev)
446{
447 struct i2c_client *i2c = to_i2c_client(dev);
448 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
449
450 disable_irq(max8997->irq);
451 if (device_may_wakeup(dev))
452 irq_set_irq_wake(max8997->irq, 1);
453 return 0;
454}
455
456static int max8997_resume(struct device *dev)
457{
458 struct i2c_client *i2c = to_i2c_client(dev);
459 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
460
461 if (device_may_wakeup(dev))
462 irq_set_irq_wake(max8997->irq, 0);
463 enable_irq(max8997->irq);
464 return max8997_irq_resume(max8997);
465}
466
467static const struct dev_pm_ops max8997_pm = {
468 .suspend = max8997_suspend,
469 .resume = max8997_resume,
470 .freeze = max8997_freeze,
471 .restore = max8997_restore,
472};
473
474static struct i2c_driver max8997_i2c_driver = {
475 .driver = {
476 .name = "max8997",
477 .pm = &max8997_pm,
478 .suppress_bind_attrs = true,
479 .of_match_table = of_match_ptr(max8997_pmic_dt_match),
480 },
481 .probe = max8997_i2c_probe,
482 .id_table = max8997_i2c_id,
483};
484
485static int __init max8997_i2c_init(void)
486{
487 return i2c_add_driver(&max8997_i2c_driver);
488}
489
490subsys_initcall(max8997_i2c_init);
491
