1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // wm8350.c  --  Voltage and current regulation for the Wolfson WM8350 PMIC
4 //
5 // Copyright 2007, 2008 Wolfson Microelectronics PLC.
6 //
7 // Author: Liam Girdwood
8 //         linux@wolfsonmicro.com
9 
10 #include <linux/module.h>
11 #include <linux/moduleparam.h>
12 #include <linux/init.h>
13 #include <linux/bitops.h>
14 #include <linux/err.h>
15 #include <linux/i2c.h>
16 #include <linux/mfd/wm8350/core.h>
17 #include <linux/mfd/wm8350/pmic.h>
18 #include <linux/platform_device.h>
19 #include <linux/regulator/driver.h>
20 #include <linux/regulator/machine.h>
21 
22 /* Maximum value possible for VSEL */
23 #define WM8350_DCDC_MAX_VSEL 0x66
24 
25 /* Microamps */
26 static const unsigned int isink_cur[] = {
27 	4,
28 	5,
29 	6,
30 	7,
31 	8,
32 	10,
33 	11,
34 	14,
35 	16,
36 	19,
37 	23,
38 	27,
39 	32,
40 	39,
41 	46,
42 	54,
43 	65,
44 	77,
45 	92,
46 	109,
47 	130,
48 	154,
49 	183,
50 	218,
51 	259,
52 	308,
53 	367,
54 	436,
55 	518,
56 	616,
57 	733,
58 	872,
59 	1037,
60 	1233,
61 	1466,
62 	1744,
63 	2073,
64 	2466,
65 	2933,
66 	3487,
67 	4147,
68 	4932,
69 	5865,
70 	6975,
71 	8294,
72 	9864,
73 	11730,
74 	13949,
75 	16589,
76 	19728,
77 	23460,
78 	27899,
79 	33178,
80 	39455,
81 	46920,
82 	55798,
83 	66355,
84 	78910,
85 	93840,
86 	111596,
87 	132710,
88 	157820,
89 	187681,
90 	223191
91 };
92 
93 /* turn on ISINK followed by DCDC */
94 static int wm8350_isink_enable(struct regulator_dev *rdev)
95 {
96 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
97 	int isink = rdev_get_id(rdev);
98 
99 	switch (isink) {
100 	case WM8350_ISINK_A:
101 		switch (wm8350->pmic.isink_A_dcdc) {
102 		case WM8350_DCDC_2:
103 		case WM8350_DCDC_5:
104 			wm8350_set_bits(wm8350, WM8350_POWER_MGMT_7,
105 					WM8350_CS1_ENA);
106 			wm8350_set_bits(wm8350, WM8350_CSA_FLASH_CONTROL,
107 					WM8350_CS1_DRIVE);
108 			wm8350_set_bits(wm8350, WM8350_DCDC_LDO_REQUESTED,
109 					1 << (wm8350->pmic.isink_A_dcdc -
110 					      WM8350_DCDC_1));
111 			break;
112 		default:
113 			return -EINVAL;
114 		}
115 		break;
116 	case WM8350_ISINK_B:
117 		switch (wm8350->pmic.isink_B_dcdc) {
118 		case WM8350_DCDC_2:
119 		case WM8350_DCDC_5:
120 			wm8350_set_bits(wm8350, WM8350_POWER_MGMT_7,
121 					WM8350_CS2_ENA);
122 			wm8350_set_bits(wm8350, WM8350_CSB_FLASH_CONTROL,
123 					WM8350_CS2_DRIVE);
124 			wm8350_set_bits(wm8350, WM8350_DCDC_LDO_REQUESTED,
125 					1 << (wm8350->pmic.isink_B_dcdc -
126 					      WM8350_DCDC_1));
127 			break;
128 		default:
129 			return -EINVAL;
130 		}
131 		break;
132 	default:
133 		return -EINVAL;
134 	}
135 	return 0;
136 }
137 
138 static int wm8350_isink_disable(struct regulator_dev *rdev)
139 {
140 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
141 	int isink = rdev_get_id(rdev);
142 
143 	switch (isink) {
144 	case WM8350_ISINK_A:
145 		switch (wm8350->pmic.isink_A_dcdc) {
146 		case WM8350_DCDC_2:
147 		case WM8350_DCDC_5:
148 			wm8350_clear_bits(wm8350, WM8350_DCDC_LDO_REQUESTED,
149 					  1 << (wm8350->pmic.isink_A_dcdc -
150 						WM8350_DCDC_1));
151 			wm8350_clear_bits(wm8350, WM8350_POWER_MGMT_7,
152 					  WM8350_CS1_ENA);
153 			break;
154 		default:
155 			return -EINVAL;
156 		}
157 		break;
158 	case WM8350_ISINK_B:
159 		switch (wm8350->pmic.isink_B_dcdc) {
160 		case WM8350_DCDC_2:
161 		case WM8350_DCDC_5:
162 			wm8350_clear_bits(wm8350, WM8350_DCDC_LDO_REQUESTED,
163 					  1 << (wm8350->pmic.isink_B_dcdc -
164 						WM8350_DCDC_1));
165 			wm8350_clear_bits(wm8350, WM8350_POWER_MGMT_7,
166 					  WM8350_CS2_ENA);
167 			break;
168 		default:
169 			return -EINVAL;
170 		}
171 		break;
172 	default:
173 		return -EINVAL;
174 	}
175 	return 0;
176 }
177 
178 static int wm8350_isink_is_enabled(struct regulator_dev *rdev)
179 {
180 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
181 	int isink = rdev_get_id(rdev);
182 
183 	switch (isink) {
184 	case WM8350_ISINK_A:
185 		return wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_A) &
186 		    0x8000;
187 	case WM8350_ISINK_B:
188 		return wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_B) &
189 		    0x8000;
190 	}
191 	return -EINVAL;
192 }
193 
194 static int wm8350_isink_enable_time(struct regulator_dev *rdev)
195 {
196 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
197 	int isink = rdev_get_id(rdev);
198 	int reg;
199 
200 	switch (isink) {
201 	case WM8350_ISINK_A:
202 		reg = wm8350_reg_read(wm8350, WM8350_CSA_FLASH_CONTROL);
203 		break;
204 	case WM8350_ISINK_B:
205 		reg = wm8350_reg_read(wm8350, WM8350_CSB_FLASH_CONTROL);
206 		break;
207 	default:
208 		return -EINVAL;
209 	}
210 
211 	if (reg & WM8350_CS1_FLASH_MODE) {
212 		switch (reg & WM8350_CS1_ON_RAMP_MASK) {
213 		case 0:
214 			return 0;
215 		case 1:
216 			return 1950;
217 		case 2:
218 			return 3910;
219 		case 3:
220 			return 7800;
221 		}
222 	} else {
223 		switch (reg & WM8350_CS1_ON_RAMP_MASK) {
224 		case 0:
225 			return 0;
226 		case 1:
227 			return 250000;
228 		case 2:
229 			return 500000;
230 		case 3:
231 			return 1000000;
232 		}
233 	}
234 
235 	return -EINVAL;
236 }
237 
238 
239 int wm8350_isink_set_flash(struct wm8350 *wm8350, int isink, u16 mode,
240 			   u16 trigger, u16 duration, u16 on_ramp, u16 off_ramp,
241 			   u16 drive)
242 {
243 	switch (isink) {
244 	case WM8350_ISINK_A:
245 		wm8350_reg_write(wm8350, WM8350_CSA_FLASH_CONTROL,
246 				 (mode ? WM8350_CS1_FLASH_MODE : 0) |
247 				 (trigger ? WM8350_CS1_TRIGSRC : 0) |
248 				 duration | on_ramp | off_ramp | drive);
249 		break;
250 	case WM8350_ISINK_B:
251 		wm8350_reg_write(wm8350, WM8350_CSB_FLASH_CONTROL,
252 				 (mode ? WM8350_CS2_FLASH_MODE : 0) |
253 				 (trigger ? WM8350_CS2_TRIGSRC : 0) |
254 				 duration | on_ramp | off_ramp | drive);
255 		break;
256 	default:
257 		return -EINVAL;
258 	}
259 	return 0;
260 }
261 EXPORT_SYMBOL_GPL(wm8350_isink_set_flash);
262 
263 static int wm8350_dcdc_set_suspend_voltage(struct regulator_dev *rdev, int uV)
264 {
265 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
266 	int sel, volt_reg, dcdc = rdev_get_id(rdev);
267 	u16 val;
268 
269 	dev_dbg(wm8350->dev, "%s %d mV %d\n", __func__, dcdc, uV / 1000);
270 
271 	switch (dcdc) {
272 	case WM8350_DCDC_1:
273 		volt_reg = WM8350_DCDC1_LOW_POWER;
274 		break;
275 	case WM8350_DCDC_3:
276 		volt_reg = WM8350_DCDC3_LOW_POWER;
277 		break;
278 	case WM8350_DCDC_4:
279 		volt_reg = WM8350_DCDC4_LOW_POWER;
280 		break;
281 	case WM8350_DCDC_6:
282 		volt_reg = WM8350_DCDC6_LOW_POWER;
283 		break;
284 	case WM8350_DCDC_2:
285 	case WM8350_DCDC_5:
286 	default:
287 		return -EINVAL;
288 	}
289 
290 	sel = regulator_map_voltage_linear(rdev, uV, uV);
291 	if (sel < 0)
292 		return sel;
293 
294 	/* all DCDCs have same mV bits */
295 	val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_DC1_VSEL_MASK;
296 	wm8350_reg_write(wm8350, volt_reg, val | sel);
297 	return 0;
298 }
299 
300 static int wm8350_dcdc_set_suspend_enable(struct regulator_dev *rdev)
301 {
302 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
303 	int dcdc = rdev_get_id(rdev);
304 	u16 val;
305 
306 	switch (dcdc) {
307 	case WM8350_DCDC_1:
308 		val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER)
309 			& ~WM8350_DCDC_HIB_MODE_MASK;
310 		wm8350_reg_write(wm8350, WM8350_DCDC1_LOW_POWER,
311 			val | wm8350->pmic.dcdc1_hib_mode);
312 		break;
313 	case WM8350_DCDC_3:
314 		val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER)
315 			& ~WM8350_DCDC_HIB_MODE_MASK;
316 		wm8350_reg_write(wm8350, WM8350_DCDC3_LOW_POWER,
317 			val | wm8350->pmic.dcdc3_hib_mode);
318 		break;
319 	case WM8350_DCDC_4:
320 		val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER)
321 			& ~WM8350_DCDC_HIB_MODE_MASK;
322 		wm8350_reg_write(wm8350, WM8350_DCDC4_LOW_POWER,
323 			val | wm8350->pmic.dcdc4_hib_mode);
324 		break;
325 	case WM8350_DCDC_6:
326 		val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER)
327 			& ~WM8350_DCDC_HIB_MODE_MASK;
328 		wm8350_reg_write(wm8350, WM8350_DCDC6_LOW_POWER,
329 			val | wm8350->pmic.dcdc6_hib_mode);
330 		break;
331 	case WM8350_DCDC_2:
332 	case WM8350_DCDC_5:
333 	default:
334 		return -EINVAL;
335 	}
336 
337 	return 0;
338 }
339 
340 static int wm8350_dcdc_set_suspend_disable(struct regulator_dev *rdev)
341 {
342 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
343 	int dcdc = rdev_get_id(rdev);
344 	u16 val;
345 
346 	switch (dcdc) {
347 	case WM8350_DCDC_1:
348 		val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER);
349 		wm8350->pmic.dcdc1_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
350 		wm8350_reg_write(wm8350, WM8350_DCDC1_LOW_POWER,
351 				 val | WM8350_DCDC_HIB_MODE_DIS);
352 		break;
353 	case WM8350_DCDC_3:
354 		val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER);
355 		wm8350->pmic.dcdc3_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
356 		wm8350_reg_write(wm8350, WM8350_DCDC3_LOW_POWER,
357 				 val | WM8350_DCDC_HIB_MODE_DIS);
358 		break;
359 	case WM8350_DCDC_4:
360 		val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER);
361 		wm8350->pmic.dcdc4_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
362 		wm8350_reg_write(wm8350, WM8350_DCDC4_LOW_POWER,
363 				 val | WM8350_DCDC_HIB_MODE_DIS);
364 		break;
365 	case WM8350_DCDC_6:
366 		val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER);
367 		wm8350->pmic.dcdc6_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
368 		wm8350_reg_write(wm8350, WM8350_DCDC6_LOW_POWER,
369 				 val | WM8350_DCDC_HIB_MODE_DIS);
370 		break;
371 	case WM8350_DCDC_2:
372 	case WM8350_DCDC_5:
373 	default:
374 		return -EINVAL;
375 	}
376 
377 	return 0;
378 }
379 
380 static int wm8350_dcdc25_set_suspend_enable(struct regulator_dev *rdev)
381 {
382 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
383 	int dcdc = rdev_get_id(rdev);
384 	u16 val;
385 
386 	switch (dcdc) {
387 	case WM8350_DCDC_2:
388 		val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL)
389 		    & ~WM8350_DC2_HIB_MODE_MASK;
390 		wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val |
391 		    (WM8350_DC2_HIB_MODE_ACTIVE << WM8350_DC2_HIB_MODE_SHIFT));
392 		break;
393 	case WM8350_DCDC_5:
394 		val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL)
395 		    & ~WM8350_DC5_HIB_MODE_MASK;
396 		wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val |
397 		    (WM8350_DC5_HIB_MODE_ACTIVE << WM8350_DC5_HIB_MODE_SHIFT));
398 		break;
399 	default:
400 		return -EINVAL;
401 	}
402 	return 0;
403 }
404 
405 static int wm8350_dcdc25_set_suspend_disable(struct regulator_dev *rdev)
406 {
407 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
408 	int dcdc = rdev_get_id(rdev);
409 	u16 val;
410 
411 	switch (dcdc) {
412 	case WM8350_DCDC_2:
413 		val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL)
414 		    & ~WM8350_DC2_HIB_MODE_MASK;
415 		wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val |
416 		    (WM8350_DC2_HIB_MODE_DISABLE << WM8350_DC2_HIB_MODE_SHIFT));
417 		break;
418 	case WM8350_DCDC_5:
419 		val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL)
420 		    & ~WM8350_DC5_HIB_MODE_MASK;
421 		wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val |
422 		    (WM8350_DC5_HIB_MODE_DISABLE << WM8350_DC5_HIB_MODE_SHIFT));
423 		break;
424 	default:
425 		return -EINVAL;
426 	}
427 	return 0;
428 }
429 
430 static int wm8350_dcdc_set_suspend_mode(struct regulator_dev *rdev,
431 	unsigned int mode)
432 {
433 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
434 	int dcdc = rdev_get_id(rdev);
435 	u16 *hib_mode;
436 
437 	switch (dcdc) {
438 	case WM8350_DCDC_1:
439 		hib_mode = &wm8350->pmic.dcdc1_hib_mode;
440 		break;
441 	case WM8350_DCDC_3:
442 		hib_mode = &wm8350->pmic.dcdc3_hib_mode;
443 		break;
444 	case WM8350_DCDC_4:
445 		hib_mode = &wm8350->pmic.dcdc4_hib_mode;
446 		break;
447 	case WM8350_DCDC_6:
448 		hib_mode = &wm8350->pmic.dcdc6_hib_mode;
449 		break;
450 	case WM8350_DCDC_2:
451 	case WM8350_DCDC_5:
452 	default:
453 		return -EINVAL;
454 	}
455 
456 	switch (mode) {
457 	case REGULATOR_MODE_NORMAL:
458 		*hib_mode = WM8350_DCDC_HIB_MODE_IMAGE;
459 		break;
460 	case REGULATOR_MODE_IDLE:
461 		*hib_mode = WM8350_DCDC_HIB_MODE_STANDBY;
462 		break;
463 	case REGULATOR_MODE_STANDBY:
464 		*hib_mode = WM8350_DCDC_HIB_MODE_LDO_IM;
465 		break;
466 	default:
467 		return -EINVAL;
468 	}
469 
470 	return 0;
471 }
472 
473 static const struct linear_range wm8350_ldo_ranges[] = {
474 	REGULATOR_LINEAR_RANGE(900000, 0, 15, 50000),
475 	REGULATOR_LINEAR_RANGE(1800000, 16, 31, 100000),
476 };
477 
478 static int wm8350_ldo_set_suspend_voltage(struct regulator_dev *rdev, int uV)
479 {
480 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
481 	int sel, volt_reg, ldo = rdev_get_id(rdev);
482 	u16 val;
483 
484 	dev_dbg(wm8350->dev, "%s %d mV %d\n", __func__, ldo, uV / 1000);
485 
486 	switch (ldo) {
487 	case WM8350_LDO_1:
488 		volt_reg = WM8350_LDO1_LOW_POWER;
489 		break;
490 	case WM8350_LDO_2:
491 		volt_reg = WM8350_LDO2_LOW_POWER;
492 		break;
493 	case WM8350_LDO_3:
494 		volt_reg = WM8350_LDO3_LOW_POWER;
495 		break;
496 	case WM8350_LDO_4:
497 		volt_reg = WM8350_LDO4_LOW_POWER;
498 		break;
499 	default:
500 		return -EINVAL;
501 	}
502 
503 	sel = regulator_map_voltage_linear_range(rdev, uV, uV);
504 	if (sel < 0)
505 		return sel;
506 
507 	/* all LDOs have same mV bits */
508 	val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_VSEL_MASK;
509 	wm8350_reg_write(wm8350, volt_reg, val | sel);
510 	return 0;
511 }
512 
513 static int wm8350_ldo_set_suspend_enable(struct regulator_dev *rdev)
514 {
515 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
516 	int volt_reg, ldo = rdev_get_id(rdev);
517 	u16 val;
518 
519 	switch (ldo) {
520 	case WM8350_LDO_1:
521 		volt_reg = WM8350_LDO1_LOW_POWER;
522 		break;
523 	case WM8350_LDO_2:
524 		volt_reg = WM8350_LDO2_LOW_POWER;
525 		break;
526 	case WM8350_LDO_3:
527 		volt_reg = WM8350_LDO3_LOW_POWER;
528 		break;
529 	case WM8350_LDO_4:
530 		volt_reg = WM8350_LDO4_LOW_POWER;
531 		break;
532 	default:
533 		return -EINVAL;
534 	}
535 
536 	/* all LDOs have same mV bits */
537 	val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_HIB_MODE_MASK;
538 	wm8350_reg_write(wm8350, volt_reg, val);
539 	return 0;
540 }
541 
542 static int wm8350_ldo_set_suspend_disable(struct regulator_dev *rdev)
543 {
544 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
545 	int volt_reg, ldo = rdev_get_id(rdev);
546 	u16 val;
547 
548 	switch (ldo) {
549 	case WM8350_LDO_1:
550 		volt_reg = WM8350_LDO1_LOW_POWER;
551 		break;
552 	case WM8350_LDO_2:
553 		volt_reg = WM8350_LDO2_LOW_POWER;
554 		break;
555 	case WM8350_LDO_3:
556 		volt_reg = WM8350_LDO3_LOW_POWER;
557 		break;
558 	case WM8350_LDO_4:
559 		volt_reg = WM8350_LDO4_LOW_POWER;
560 		break;
561 	default:
562 		return -EINVAL;
563 	}
564 
565 	/* all LDOs have same mV bits */
566 	val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_HIB_MODE_MASK;
567 	wm8350_reg_write(wm8350, volt_reg, val | WM8350_LDO1_HIB_MODE_DIS);
568 	return 0;
569 }
570 
571 int wm8350_dcdc_set_slot(struct wm8350 *wm8350, int dcdc, u16 start,
572 			 u16 stop, u16 fault)
573 {
574 	int slot_reg;
575 	u16 val;
576 
577 	dev_dbg(wm8350->dev, "%s %d start %d stop %d\n",
578 		__func__, dcdc, start, stop);
579 
580 	/* slot valid ? */
581 	if (start > 15 || stop > 15)
582 		return -EINVAL;
583 
584 	switch (dcdc) {
585 	case WM8350_DCDC_1:
586 		slot_reg = WM8350_DCDC1_TIMEOUTS;
587 		break;
588 	case WM8350_DCDC_2:
589 		slot_reg = WM8350_DCDC2_TIMEOUTS;
590 		break;
591 	case WM8350_DCDC_3:
592 		slot_reg = WM8350_DCDC3_TIMEOUTS;
593 		break;
594 	case WM8350_DCDC_4:
595 		slot_reg = WM8350_DCDC4_TIMEOUTS;
596 		break;
597 	case WM8350_DCDC_5:
598 		slot_reg = WM8350_DCDC5_TIMEOUTS;
599 		break;
600 	case WM8350_DCDC_6:
601 		slot_reg = WM8350_DCDC6_TIMEOUTS;
602 		break;
603 	default:
604 		return -EINVAL;
605 	}
606 
607 	val = wm8350_reg_read(wm8350, slot_reg) &
608 	    ~(WM8350_DC1_ENSLOT_MASK | WM8350_DC1_SDSLOT_MASK |
609 	      WM8350_DC1_ERRACT_MASK);
610 	wm8350_reg_write(wm8350, slot_reg,
611 			 val | (start << WM8350_DC1_ENSLOT_SHIFT) |
612 			 (stop << WM8350_DC1_SDSLOT_SHIFT) |
613 			 (fault << WM8350_DC1_ERRACT_SHIFT));
614 
615 	return 0;
616 }
617 EXPORT_SYMBOL_GPL(wm8350_dcdc_set_slot);
618 
619 int wm8350_ldo_set_slot(struct wm8350 *wm8350, int ldo, u16 start, u16 stop)
620 {
621 	int slot_reg;
622 	u16 val;
623 
624 	dev_dbg(wm8350->dev, "%s %d start %d stop %d\n",
625 		__func__, ldo, start, stop);
626 
627 	/* slot valid ? */
628 	if (start > 15 || stop > 15)
629 		return -EINVAL;
630 
631 	switch (ldo) {
632 	case WM8350_LDO_1:
633 		slot_reg = WM8350_LDO1_TIMEOUTS;
634 		break;
635 	case WM8350_LDO_2:
636 		slot_reg = WM8350_LDO2_TIMEOUTS;
637 		break;
638 	case WM8350_LDO_3:
639 		slot_reg = WM8350_LDO3_TIMEOUTS;
640 		break;
641 	case WM8350_LDO_4:
642 		slot_reg = WM8350_LDO4_TIMEOUTS;
643 		break;
644 	default:
645 		return -EINVAL;
646 	}
647 
648 	val = wm8350_reg_read(wm8350, slot_reg) & ~WM8350_LDO1_SDSLOT_MASK;
649 	wm8350_reg_write(wm8350, slot_reg, val | ((start << 10) | (stop << 6)));
650 	return 0;
651 }
652 EXPORT_SYMBOL_GPL(wm8350_ldo_set_slot);
653 
654 int wm8350_dcdc25_set_mode(struct wm8350 *wm8350, int dcdc, u16 mode,
655 			   u16 ilim, u16 ramp, u16 feedback)
656 {
657 	u16 val;
658 
659 	dev_dbg(wm8350->dev, "%s %d mode: %s %s\n", __func__, dcdc,
660 		mode ? "normal" : "boost", ilim ? "low" : "normal");
661 
662 	switch (dcdc) {
663 	case WM8350_DCDC_2:
664 		val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL)
665 		    & ~(WM8350_DC2_MODE_MASK | WM8350_DC2_ILIM_MASK |
666 			WM8350_DC2_RMP_MASK | WM8350_DC2_FBSRC_MASK);
667 		wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val |
668 				 (mode << WM8350_DC2_MODE_SHIFT) |
669 				 (ilim << WM8350_DC2_ILIM_SHIFT) |
670 				 (ramp << WM8350_DC2_RMP_SHIFT) |
671 				 (feedback << WM8350_DC2_FBSRC_SHIFT));
672 		break;
673 	case WM8350_DCDC_5:
674 		val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL)
675 		    & ~(WM8350_DC5_MODE_MASK | WM8350_DC5_ILIM_MASK |
676 			WM8350_DC5_RMP_MASK | WM8350_DC5_FBSRC_MASK);
677 		wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val |
678 				 (mode << WM8350_DC5_MODE_SHIFT) |
679 				 (ilim << WM8350_DC5_ILIM_SHIFT) |
680 				 (ramp << WM8350_DC5_RMP_SHIFT) |
681 				 (feedback << WM8350_DC5_FBSRC_SHIFT));
682 		break;
683 	default:
684 		return -EINVAL;
685 	}
686 
687 	return 0;
688 }
689 EXPORT_SYMBOL_GPL(wm8350_dcdc25_set_mode);
690 
691 static int force_continuous_enable(struct wm8350 *wm8350, int dcdc, int enable)
692 {
693 	int reg = 0, ret;
694 
695 	switch (dcdc) {
696 	case WM8350_DCDC_1:
697 		reg = WM8350_DCDC1_FORCE_PWM;
698 		break;
699 	case WM8350_DCDC_3:
700 		reg = WM8350_DCDC3_FORCE_PWM;
701 		break;
702 	case WM8350_DCDC_4:
703 		reg = WM8350_DCDC4_FORCE_PWM;
704 		break;
705 	case WM8350_DCDC_6:
706 		reg = WM8350_DCDC6_FORCE_PWM;
707 		break;
708 	default:
709 		return -EINVAL;
710 	}
711 
712 	if (enable)
713 		ret = wm8350_set_bits(wm8350, reg,
714 			WM8350_DCDC1_FORCE_PWM_ENA);
715 	else
716 		ret = wm8350_clear_bits(wm8350, reg,
717 			WM8350_DCDC1_FORCE_PWM_ENA);
718 	return ret;
719 }
720 
721 static int wm8350_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode)
722 {
723 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
724 	int dcdc = rdev_get_id(rdev);
725 	u16 val;
726 
727 	if (dcdc < WM8350_DCDC_1 || dcdc > WM8350_DCDC_6)
728 		return -EINVAL;
729 
730 	if (dcdc == WM8350_DCDC_2 || dcdc == WM8350_DCDC_5)
731 		return -EINVAL;
732 
733 	val = 1 << (dcdc - WM8350_DCDC_1);
734 
735 	switch (mode) {
736 	case REGULATOR_MODE_FAST:
737 		/* force continuous mode */
738 		wm8350_set_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val);
739 		wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val);
740 		force_continuous_enable(wm8350, dcdc, 1);
741 		break;
742 	case REGULATOR_MODE_NORMAL:
743 		/* active / pulse skipping */
744 		wm8350_set_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val);
745 		wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val);
746 		force_continuous_enable(wm8350, dcdc, 0);
747 		break;
748 	case REGULATOR_MODE_IDLE:
749 		/* standby mode */
750 		force_continuous_enable(wm8350, dcdc, 0);
751 		wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val);
752 		wm8350_clear_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val);
753 		break;
754 	case REGULATOR_MODE_STANDBY:
755 		/* LDO mode */
756 		force_continuous_enable(wm8350, dcdc, 0);
757 		wm8350_set_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val);
758 		break;
759 	}
760 
761 	return 0;
762 }
763 
764 static unsigned int wm8350_dcdc_get_mode(struct regulator_dev *rdev)
765 {
766 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
767 	int dcdc = rdev_get_id(rdev);
768 	u16 mask, sleep, active, force;
769 	int mode = REGULATOR_MODE_NORMAL;
770 	int reg;
771 
772 	switch (dcdc) {
773 	case WM8350_DCDC_1:
774 		reg = WM8350_DCDC1_FORCE_PWM;
775 		break;
776 	case WM8350_DCDC_3:
777 		reg = WM8350_DCDC3_FORCE_PWM;
778 		break;
779 	case WM8350_DCDC_4:
780 		reg = WM8350_DCDC4_FORCE_PWM;
781 		break;
782 	case WM8350_DCDC_6:
783 		reg = WM8350_DCDC6_FORCE_PWM;
784 		break;
785 	default:
786 		return -EINVAL;
787 	}
788 
789 	mask = 1 << (dcdc - WM8350_DCDC_1);
790 	active = wm8350_reg_read(wm8350, WM8350_DCDC_ACTIVE_OPTIONS) & mask;
791 	force = wm8350_reg_read(wm8350, reg) & WM8350_DCDC1_FORCE_PWM_ENA;
792 	sleep = wm8350_reg_read(wm8350, WM8350_DCDC_SLEEP_OPTIONS) & mask;
793 
794 	dev_dbg(wm8350->dev, "mask %x active %x sleep %x force %x",
795 		mask, active, sleep, force);
796 
797 	if (active && !sleep) {
798 		if (force)
799 			mode = REGULATOR_MODE_FAST;
800 		else
801 			mode = REGULATOR_MODE_NORMAL;
802 	} else if (!active && !sleep)
803 		mode = REGULATOR_MODE_IDLE;
804 	else if (sleep)
805 		mode = REGULATOR_MODE_STANDBY;
806 
807 	return mode;
808 }
809 
810 static unsigned int wm8350_ldo_get_mode(struct regulator_dev *rdev)
811 {
812 	return REGULATOR_MODE_NORMAL;
813 }
814 
815 struct wm8350_dcdc_efficiency {
816 	int uA_load_min;
817 	int uA_load_max;
818 	unsigned int mode;
819 };
820 
821 static const struct wm8350_dcdc_efficiency dcdc1_6_efficiency[] = {
822 	{0, 10000, REGULATOR_MODE_STANDBY},       /* 0 - 10mA - LDO */
823 	{10000, 100000, REGULATOR_MODE_IDLE},     /* 10mA - 100mA - Standby */
824 	{100000, 1000000, REGULATOR_MODE_NORMAL}, /* > 100mA - Active */
825 	{-1, -1, REGULATOR_MODE_NORMAL},
826 };
827 
828 static const struct wm8350_dcdc_efficiency dcdc3_4_efficiency[] = {
829 	{0, 10000, REGULATOR_MODE_STANDBY},      /* 0 - 10mA - LDO */
830 	{10000, 100000, REGULATOR_MODE_IDLE},    /* 10mA - 100mA - Standby */
831 	{100000, 800000, REGULATOR_MODE_NORMAL}, /* > 100mA - Active */
832 	{-1, -1, REGULATOR_MODE_NORMAL},
833 };
834 
835 static unsigned int get_mode(int uA, const struct wm8350_dcdc_efficiency *eff)
836 {
837 	int i = 0;
838 
839 	while (eff[i].uA_load_min != -1) {
840 		if (uA >= eff[i].uA_load_min && uA <= eff[i].uA_load_max)
841 			return eff[i].mode;
842 		i++;
843 	}
844 	return REGULATOR_MODE_NORMAL;
845 }
846 
847 /* Query the regulator for it's most efficient mode @ uV,uA
848  * WM8350 regulator efficiency is pretty similar over
849  * different input and output uV.
850  */
851 static unsigned int wm8350_dcdc_get_optimum_mode(struct regulator_dev *rdev,
852 						 int input_uV, int output_uV,
853 						 int output_uA)
854 {
855 	int dcdc = rdev_get_id(rdev), mode;
856 
857 	switch (dcdc) {
858 	case WM8350_DCDC_1:
859 	case WM8350_DCDC_6:
860 		mode = get_mode(output_uA, dcdc1_6_efficiency);
861 		break;
862 	case WM8350_DCDC_3:
863 	case WM8350_DCDC_4:
864 		mode = get_mode(output_uA, dcdc3_4_efficiency);
865 		break;
866 	default:
867 		mode = REGULATOR_MODE_NORMAL;
868 		break;
869 	}
870 	return mode;
871 }
872 
873 static const struct regulator_ops wm8350_dcdc_ops = {
874 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
875 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
876 	.list_voltage = regulator_list_voltage_linear,
877 	.map_voltage = regulator_map_voltage_linear,
878 	.enable = regulator_enable_regmap,
879 	.disable = regulator_disable_regmap,
880 	.is_enabled = regulator_is_enabled_regmap,
881 	.get_mode = wm8350_dcdc_get_mode,
882 	.set_mode = wm8350_dcdc_set_mode,
883 	.get_optimum_mode = wm8350_dcdc_get_optimum_mode,
884 	.set_suspend_voltage = wm8350_dcdc_set_suspend_voltage,
885 	.set_suspend_enable = wm8350_dcdc_set_suspend_enable,
886 	.set_suspend_disable = wm8350_dcdc_set_suspend_disable,
887 	.set_suspend_mode = wm8350_dcdc_set_suspend_mode,
888 };
889 
890 static const struct regulator_ops wm8350_dcdc2_5_ops = {
891 	.enable = regulator_enable_regmap,
892 	.disable = regulator_disable_regmap,
893 	.is_enabled = regulator_is_enabled_regmap,
894 	.set_suspend_enable = wm8350_dcdc25_set_suspend_enable,
895 	.set_suspend_disable = wm8350_dcdc25_set_suspend_disable,
896 };
897 
898 static const struct regulator_ops wm8350_ldo_ops = {
899 	.map_voltage = regulator_map_voltage_linear_range,
900 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
901 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
902 	.list_voltage = regulator_list_voltage_linear_range,
903 	.enable = regulator_enable_regmap,
904 	.disable = regulator_disable_regmap,
905 	.is_enabled = regulator_is_enabled_regmap,
906 	.get_mode = wm8350_ldo_get_mode,
907 	.set_suspend_voltage = wm8350_ldo_set_suspend_voltage,
908 	.set_suspend_enable = wm8350_ldo_set_suspend_enable,
909 	.set_suspend_disable = wm8350_ldo_set_suspend_disable,
910 };
911 
912 static const struct regulator_ops wm8350_isink_ops = {
913 	.set_current_limit = regulator_set_current_limit_regmap,
914 	.get_current_limit = regulator_get_current_limit_regmap,
915 	.enable = wm8350_isink_enable,
916 	.disable = wm8350_isink_disable,
917 	.is_enabled = wm8350_isink_is_enabled,
918 	.enable_time = wm8350_isink_enable_time,
919 };
920 
921 static const struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = {
922 	{
923 		.name = "DCDC1",
924 		.id = WM8350_DCDC_1,
925 		.ops = &wm8350_dcdc_ops,
926 		.irq = WM8350_IRQ_UV_DC1,
927 		.type = REGULATOR_VOLTAGE,
928 		.n_voltages = WM8350_DCDC_MAX_VSEL + 1,
929 		.min_uV = 850000,
930 		.uV_step = 25000,
931 		.vsel_reg = WM8350_DCDC1_CONTROL,
932 		.vsel_mask = WM8350_DC1_VSEL_MASK,
933 		.enable_reg = WM8350_DCDC_LDO_REQUESTED,
934 		.enable_mask = WM8350_DC1_ENA,
935 		.owner = THIS_MODULE,
936 	},
937 	{
938 		.name = "DCDC2",
939 		.id = WM8350_DCDC_2,
940 		.ops = &wm8350_dcdc2_5_ops,
941 		.irq = WM8350_IRQ_UV_DC2,
942 		.type = REGULATOR_VOLTAGE,
943 		.enable_reg = WM8350_DCDC_LDO_REQUESTED,
944 		.enable_mask = WM8350_DC2_ENA,
945 		.owner = THIS_MODULE,
946 	},
947 	{
948 		.name = "DCDC3",
949 		.id = WM8350_DCDC_3,
950 		.ops = &wm8350_dcdc_ops,
951 		.irq = WM8350_IRQ_UV_DC3,
952 		.type = REGULATOR_VOLTAGE,
953 		.n_voltages = WM8350_DCDC_MAX_VSEL + 1,
954 		.min_uV = 850000,
955 		.uV_step = 25000,
956 		.vsel_reg = WM8350_DCDC3_CONTROL,
957 		.vsel_mask = WM8350_DC3_VSEL_MASK,
958 		.enable_reg = WM8350_DCDC_LDO_REQUESTED,
959 		.enable_mask = WM8350_DC3_ENA,
960 		.owner = THIS_MODULE,
961 	},
962 	{
963 		.name = "DCDC4",
964 		.id = WM8350_DCDC_4,
965 		.ops = &wm8350_dcdc_ops,
966 		.irq = WM8350_IRQ_UV_DC4,
967 		.type = REGULATOR_VOLTAGE,
968 		.n_voltages = WM8350_DCDC_MAX_VSEL + 1,
969 		.min_uV = 850000,
970 		.uV_step = 25000,
971 		.vsel_reg = WM8350_DCDC4_CONTROL,
972 		.vsel_mask = WM8350_DC4_VSEL_MASK,
973 		.enable_reg = WM8350_DCDC_LDO_REQUESTED,
974 		.enable_mask = WM8350_DC4_ENA,
975 		.owner = THIS_MODULE,
976 	},
977 	{
978 		.name = "DCDC5",
979 		.id = WM8350_DCDC_5,
980 		.ops = &wm8350_dcdc2_5_ops,
981 		.irq = WM8350_IRQ_UV_DC5,
982 		.type = REGULATOR_VOLTAGE,
983 		.enable_reg = WM8350_DCDC_LDO_REQUESTED,
984 		.enable_mask = WM8350_DC5_ENA,
985 		.owner = THIS_MODULE,
986 	 },
987 	{
988 		.name = "DCDC6",
989 		.id = WM8350_DCDC_6,
990 		.ops = &wm8350_dcdc_ops,
991 		.irq = WM8350_IRQ_UV_DC6,
992 		.type = REGULATOR_VOLTAGE,
993 		.n_voltages = WM8350_DCDC_MAX_VSEL + 1,
994 		.min_uV = 850000,
995 		.uV_step = 25000,
996 		.vsel_reg = WM8350_DCDC6_CONTROL,
997 		.vsel_mask = WM8350_DC6_VSEL_MASK,
998 		.enable_reg = WM8350_DCDC_LDO_REQUESTED,
999 		.enable_mask = WM8350_DC6_ENA,
1000 		.owner = THIS_MODULE,
1001 	},
1002 	{
1003 		.name = "LDO1",
1004 		.id = WM8350_LDO_1,
1005 		.ops = &wm8350_ldo_ops,
1006 		.irq = WM8350_IRQ_UV_LDO1,
1007 		.type = REGULATOR_VOLTAGE,
1008 		.n_voltages = WM8350_LDO1_VSEL_MASK + 1,
1009 		.linear_ranges = wm8350_ldo_ranges,
1010 		.n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges),
1011 		.vsel_reg = WM8350_LDO1_CONTROL,
1012 		.vsel_mask = WM8350_LDO1_VSEL_MASK,
1013 		.enable_reg = WM8350_DCDC_LDO_REQUESTED,
1014 		.enable_mask = WM8350_LDO1_ENA,
1015 		.owner = THIS_MODULE,
1016 	},
1017 	{
1018 		.name = "LDO2",
1019 		.id = WM8350_LDO_2,
1020 		.ops = &wm8350_ldo_ops,
1021 		.irq = WM8350_IRQ_UV_LDO2,
1022 		.type = REGULATOR_VOLTAGE,
1023 		.n_voltages = WM8350_LDO2_VSEL_MASK + 1,
1024 		.linear_ranges = wm8350_ldo_ranges,
1025 		.n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges),
1026 		.vsel_reg = WM8350_LDO2_CONTROL,
1027 		.vsel_mask = WM8350_LDO2_VSEL_MASK,
1028 		.enable_reg = WM8350_DCDC_LDO_REQUESTED,
1029 		.enable_mask = WM8350_LDO2_ENA,
1030 		.owner = THIS_MODULE,
1031 	},
1032 	{
1033 		.name = "LDO3",
1034 		.id = WM8350_LDO_3,
1035 		.ops = &wm8350_ldo_ops,
1036 		.irq = WM8350_IRQ_UV_LDO3,
1037 		.type = REGULATOR_VOLTAGE,
1038 		.n_voltages = WM8350_LDO3_VSEL_MASK + 1,
1039 		.linear_ranges = wm8350_ldo_ranges,
1040 		.n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges),
1041 		.vsel_reg = WM8350_LDO3_CONTROL,
1042 		.vsel_mask = WM8350_LDO3_VSEL_MASK,
1043 		.enable_reg = WM8350_DCDC_LDO_REQUESTED,
1044 		.enable_mask = WM8350_LDO3_ENA,
1045 		.owner = THIS_MODULE,
1046 	},
1047 	{
1048 		.name = "LDO4",
1049 		.id = WM8350_LDO_4,
1050 		.ops = &wm8350_ldo_ops,
1051 		.irq = WM8350_IRQ_UV_LDO4,
1052 		.type = REGULATOR_VOLTAGE,
1053 		.n_voltages = WM8350_LDO4_VSEL_MASK + 1,
1054 		.linear_ranges = wm8350_ldo_ranges,
1055 		.n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges),
1056 		.vsel_reg = WM8350_LDO4_CONTROL,
1057 		.vsel_mask = WM8350_LDO4_VSEL_MASK,
1058 		.enable_reg = WM8350_DCDC_LDO_REQUESTED,
1059 		.enable_mask = WM8350_LDO4_ENA,
1060 		.owner = THIS_MODULE,
1061 	},
1062 	{
1063 		.name = "ISINKA",
1064 		.id = WM8350_ISINK_A,
1065 		.ops = &wm8350_isink_ops,
1066 		.irq = WM8350_IRQ_CS1,
1067 		.type = REGULATOR_CURRENT,
1068 		.owner = THIS_MODULE,
1069 		.curr_table = isink_cur,
1070 		.n_current_limits = ARRAY_SIZE(isink_cur),
1071 		.csel_reg = WM8350_CURRENT_SINK_DRIVER_A,
1072 		.csel_mask = WM8350_CS1_ISEL_MASK,
1073 	 },
1074 	{
1075 		.name = "ISINKB",
1076 		.id = WM8350_ISINK_B,
1077 		.ops = &wm8350_isink_ops,
1078 		.irq = WM8350_IRQ_CS2,
1079 		.type = REGULATOR_CURRENT,
1080 		.owner = THIS_MODULE,
1081 		.curr_table = isink_cur,
1082 		.n_current_limits = ARRAY_SIZE(isink_cur),
1083 		.csel_reg = WM8350_CURRENT_SINK_DRIVER_B,
1084 		.csel_mask = WM8350_CS2_ISEL_MASK,
1085 	 },
1086 };
1087 
1088 static irqreturn_t pmic_uv_handler(int irq, void *data)
1089 {
1090 	struct regulator_dev *rdev = (struct regulator_dev *)data;
1091 
1092 	regulator_lock(rdev);
1093 	if (irq == WM8350_IRQ_CS1 || irq == WM8350_IRQ_CS2)
1094 		regulator_notifier_call_chain(rdev,
1095 					      REGULATOR_EVENT_REGULATION_OUT,
1096 					      NULL);
1097 	else
1098 		regulator_notifier_call_chain(rdev,
1099 					      REGULATOR_EVENT_UNDER_VOLTAGE,
1100 					      NULL);
1101 	regulator_unlock(rdev);
1102 
1103 	return IRQ_HANDLED;
1104 }
1105 
1106 static int wm8350_regulator_probe(struct platform_device *pdev)
1107 {
1108 	struct wm8350 *wm8350 = dev_get_drvdata(&pdev->dev);
1109 	struct regulator_config config = { };
1110 	struct regulator_dev *rdev;
1111 	int ret;
1112 	u16 val;
1113 
1114 	if (pdev->id < WM8350_DCDC_1 || pdev->id > WM8350_ISINK_B)
1115 		return -ENODEV;
1116 
1117 	/* do any regulatior specific init */
1118 	switch (pdev->id) {
1119 	case WM8350_DCDC_1:
1120 		val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER);
1121 		wm8350->pmic.dcdc1_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
1122 		break;
1123 	case WM8350_DCDC_3:
1124 		val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER);
1125 		wm8350->pmic.dcdc3_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
1126 		break;
1127 	case WM8350_DCDC_4:
1128 		val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER);
1129 		wm8350->pmic.dcdc4_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
1130 		break;
1131 	case WM8350_DCDC_6:
1132 		val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER);
1133 		wm8350->pmic.dcdc6_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
1134 		break;
1135 	}
1136 
1137 	config.dev = &pdev->dev;
1138 	config.init_data = dev_get_platdata(&pdev->dev);
1139 	config.driver_data = dev_get_drvdata(&pdev->dev);
1140 	config.regmap = wm8350->regmap;
1141 
1142 	/* register regulator */
1143 	rdev = devm_regulator_register(&pdev->dev, &wm8350_reg[pdev->id],
1144 				       &config);
1145 	if (IS_ERR(rdev)) {
1146 		dev_err(&pdev->dev, "failed to register %s\n",
1147 			wm8350_reg[pdev->id].name);
1148 		return PTR_ERR(rdev);
1149 	}
1150 
1151 	/* register regulator IRQ */
1152 	ret = wm8350_register_irq(wm8350, wm8350_reg[pdev->id].irq,
1153 				  pmic_uv_handler, 0, "UV", rdev);
1154 	if (ret < 0) {
1155 		dev_err(&pdev->dev, "failed to register regulator %s IRQ\n",
1156 			wm8350_reg[pdev->id].name);
1157 		return ret;
1158 	}
1159 
1160 	return 0;
1161 }
1162 
1163 static int wm8350_regulator_remove(struct platform_device *pdev)
1164 {
1165 	struct regulator_dev *rdev = platform_get_drvdata(pdev);
1166 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
1167 
1168 	wm8350_free_irq(wm8350, wm8350_reg[pdev->id].irq, rdev);
1169 
1170 	return 0;
1171 }
1172 
1173 int wm8350_register_regulator(struct wm8350 *wm8350, int reg,
1174 			      struct regulator_init_data *initdata)
1175 {
1176 	struct platform_device *pdev;
1177 	int ret;
1178 	if (reg < 0 || reg >= NUM_WM8350_REGULATORS)
1179 		return -EINVAL;
1180 
1181 	if (wm8350->pmic.pdev[reg])
1182 		return -EBUSY;
1183 
1184 	if (reg >= WM8350_DCDC_1 && reg <= WM8350_DCDC_6 &&
1185 	    reg > wm8350->pmic.max_dcdc)
1186 		return -ENODEV;
1187 	if (reg >= WM8350_ISINK_A && reg <= WM8350_ISINK_B &&
1188 	    reg > wm8350->pmic.max_isink)
1189 		return -ENODEV;
1190 
1191 	pdev = platform_device_alloc("wm8350-regulator", reg);
1192 	if (!pdev)
1193 		return -ENOMEM;
1194 
1195 	wm8350->pmic.pdev[reg] = pdev;
1196 
1197 	initdata->driver_data = wm8350;
1198 
1199 	pdev->dev.platform_data = initdata;
1200 	pdev->dev.parent = wm8350->dev;
1201 	platform_set_drvdata(pdev, wm8350);
1202 
1203 	ret = platform_device_add(pdev);
1204 
1205 	if (ret != 0) {
1206 		dev_err(wm8350->dev, "Failed to register regulator %d: %d\n",
1207 			reg, ret);
1208 		platform_device_put(pdev);
1209 		wm8350->pmic.pdev[reg] = NULL;
1210 	}
1211 
1212 	return ret;
1213 }
1214 EXPORT_SYMBOL_GPL(wm8350_register_regulator);
1215 
1216 /**
1217  * wm8350_register_led - Register a WM8350 LED output
1218  *
1219  * @param wm8350 The WM8350 device to configure.
1220  * @param lednum LED device index to create.
1221  * @param dcdc The DCDC to use for the LED.
1222  * @param isink The ISINK to use for the LED.
1223  * @param pdata Configuration for the LED.
1224  *
1225  * The WM8350 supports the use of an ISINK together with a DCDC to
1226  * provide a power-efficient LED driver.  This function registers the
1227  * regulators and instantiates the platform device for a LED.  The
1228  * operating modes for the LED regulators must be configured using
1229  * wm8350_isink_set_flash(), wm8350_dcdc25_set_mode() and
1230  * wm8350_dcdc_set_slot() prior to calling this function.
1231  */
1232 int wm8350_register_led(struct wm8350 *wm8350, int lednum, int dcdc, int isink,
1233 			struct wm8350_led_platform_data *pdata)
1234 {
1235 	struct wm8350_led *led;
1236 	struct platform_device *pdev;
1237 	int ret;
1238 
1239 	if (lednum >= ARRAY_SIZE(wm8350->pmic.led) || lednum < 0) {
1240 		dev_err(wm8350->dev, "Invalid LED index %d\n", lednum);
1241 		return -ENODEV;
1242 	}
1243 
1244 	led = &wm8350->pmic.led[lednum];
1245 
1246 	if (led->pdev) {
1247 		dev_err(wm8350->dev, "LED %d already allocated\n", lednum);
1248 		return -EINVAL;
1249 	}
1250 
1251 	pdev = platform_device_alloc("wm8350-led", lednum);
1252 	if (pdev == NULL) {
1253 		dev_err(wm8350->dev, "Failed to allocate LED %d\n", lednum);
1254 		return -ENOMEM;
1255 	}
1256 
1257 	led->isink_consumer.dev_name = dev_name(&pdev->dev);
1258 	led->isink_consumer.supply = "led_isink";
1259 	led->isink_init.num_consumer_supplies = 1;
1260 	led->isink_init.consumer_supplies = &led->isink_consumer;
1261 	led->isink_init.constraints.min_uA = 0;
1262 	led->isink_init.constraints.max_uA = pdata->max_uA;
1263 	led->isink_init.constraints.valid_ops_mask
1264 		= REGULATOR_CHANGE_CURRENT | REGULATOR_CHANGE_STATUS;
1265 	led->isink_init.constraints.valid_modes_mask = REGULATOR_MODE_NORMAL;
1266 	ret = wm8350_register_regulator(wm8350, isink, &led->isink_init);
1267 	if (ret != 0) {
1268 		platform_device_put(pdev);
1269 		return ret;
1270 	}
1271 
1272 	led->dcdc_consumer.dev_name = dev_name(&pdev->dev);
1273 	led->dcdc_consumer.supply = "led_vcc";
1274 	led->dcdc_init.num_consumer_supplies = 1;
1275 	led->dcdc_init.consumer_supplies = &led->dcdc_consumer;
1276 	led->dcdc_init.constraints.valid_modes_mask = REGULATOR_MODE_NORMAL;
1277 	led->dcdc_init.constraints.valid_ops_mask =  REGULATOR_CHANGE_STATUS;
1278 	ret = wm8350_register_regulator(wm8350, dcdc, &led->dcdc_init);
1279 	if (ret != 0) {
1280 		platform_device_put(pdev);
1281 		return ret;
1282 	}
1283 
1284 	switch (isink) {
1285 	case WM8350_ISINK_A:
1286 		wm8350->pmic.isink_A_dcdc = dcdc;
1287 		break;
1288 	case WM8350_ISINK_B:
1289 		wm8350->pmic.isink_B_dcdc = dcdc;
1290 		break;
1291 	}
1292 
1293 	pdev->dev.platform_data = pdata;
1294 	pdev->dev.parent = wm8350->dev;
1295 	ret = platform_device_add(pdev);
1296 	if (ret != 0) {
1297 		dev_err(wm8350->dev, "Failed to register LED %d: %d\n",
1298 			lednum, ret);
1299 		platform_device_put(pdev);
1300 		return ret;
1301 	}
1302 
1303 	led->pdev = pdev;
1304 
1305 	return 0;
1306 }
1307 EXPORT_SYMBOL_GPL(wm8350_register_led);
1308 
1309 static struct platform_driver wm8350_regulator_driver = {
1310 	.probe = wm8350_regulator_probe,
1311 	.remove = wm8350_regulator_remove,
1312 	.driver		= {
1313 		.name	= "wm8350-regulator",
1314 	},
1315 };
1316 
1317 static int __init wm8350_regulator_init(void)
1318 {
1319 	return platform_driver_register(&wm8350_regulator_driver);
1320 }
1321 subsys_initcall(wm8350_regulator_init);
1322 
1323 static void __exit wm8350_regulator_exit(void)
1324 {
1325 	platform_driver_unregister(&wm8350_regulator_driver);
1326 }
1327 module_exit(wm8350_regulator_exit);
1328 
1329 /* Module information */
1330 MODULE_AUTHOR("Liam Girdwood");
1331 MODULE_DESCRIPTION("WM8350 voltage and current regulator driver");
1332 MODULE_LICENSE("GPL");
1333 MODULE_ALIAS("platform:wm8350-regulator");
1334