1 
2 /*
3  * Regulator driver for DA9063 PMIC series
4  *
5  * Copyright 2012 Dialog Semiconductors Ltd.
6  * Copyright 2013 Philipp Zabel, Pengutronix
7  *
8  * Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com>
9  *
10  *  This program is free software; you can redistribute  it and/or modify it
11  *  under  the terms of  the GNU General  Public License as published by the
12  *  Free Software Foundation;  either version 2 of the  License, or (at your
13  *  option) any later version.
14  *
15  */
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/err.h>
20 #include <linux/slab.h>
21 #include <linux/of.h>
22 #include <linux/platform_device.h>
23 #include <linux/regmap.h>
24 #include <linux/regulator/driver.h>
25 #include <linux/regulator/machine.h>
26 #include <linux/regulator/of_regulator.h>
27 #include <linux/mfd/da9063/core.h>
28 #include <linux/mfd/da9063/pdata.h>
29 #include <linux/mfd/da9063/registers.h>
30 
31 
32 /* Definition for registering regmap bit fields using a mask */
33 #define BFIELD(_reg, _mask) \
34 	REG_FIELD(_reg, __builtin_ffs((int)_mask) - 1, \
35 		sizeof(unsigned int) * 8 - __builtin_clz((_mask)) - 1)
36 
37 /* Regulator capabilities and registers description */
38 struct da9063_regulator_info {
39 	struct regulator_desc desc;
40 
41 	/* Current limiting */
42 	unsigned	n_current_limits;
43 	const int	*current_limits;
44 
45 	/* DA9063 main register fields */
46 	struct reg_field mode;		/* buck mode of operation */
47 	struct reg_field suspend;
48 	struct reg_field sleep;
49 	struct reg_field suspend_sleep;
50 	unsigned int suspend_vsel_reg;
51 	struct reg_field ilimit;
52 
53 	/* DA9063 event detection bit */
54 	struct reg_field oc_event;
55 };
56 
57 /* Macros for LDO */
58 #define DA9063_LDO(chip, regl_name, min_mV, step_mV, max_mV) \
59 	.desc.id = chip##_ID_##regl_name, \
60 	.desc.name = __stringify(chip##_##regl_name), \
61 	.desc.ops = &da9063_ldo_ops, \
62 	.desc.min_uV = (min_mV) * 1000, \
63 	.desc.uV_step = (step_mV) * 1000, \
64 	.desc.n_voltages = (((max_mV) - (min_mV))/(step_mV) + 1 \
65 		+ (DA9063_V##regl_name##_BIAS)), \
66 	.desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
67 	.desc.enable_mask = DA9063_LDO_EN, \
68 	.desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
69 	.desc.vsel_mask = DA9063_V##regl_name##_MASK, \
70 	.desc.linear_min_sel = DA9063_V##regl_name##_BIAS, \
71 	.sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_LDO_SL), \
72 	.suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_LDO_SL), \
73 	.suspend_vsel_reg = DA9063_REG_V##regl_name##_B
74 
75 /* Macros for voltage DC/DC converters (BUCKs) */
76 #define DA9063_BUCK(chip, regl_name, min_mV, step_mV, max_mV, limits_array) \
77 	.desc.id = chip##_ID_##regl_name, \
78 	.desc.name = __stringify(chip##_##regl_name), \
79 	.desc.ops = &da9063_buck_ops, \
80 	.desc.min_uV = (min_mV) * 1000, \
81 	.desc.uV_step = (step_mV) * 1000, \
82 	.desc.n_voltages = ((max_mV) - (min_mV))/(step_mV) + 1, \
83 	.current_limits = limits_array, \
84 	.n_current_limits = ARRAY_SIZE(limits_array)
85 
86 #define DA9063_BUCK_COMMON_FIELDS(regl_name) \
87 	.desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
88 	.desc.enable_mask = DA9063_BUCK_EN, \
89 	.desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
90 	.desc.vsel_mask = DA9063_VBUCK_MASK, \
91 	.desc.linear_min_sel = DA9063_VBUCK_BIAS, \
92 	.sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_BUCK_SL), \
93 	.suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_BUCK_SL), \
94 	.suspend_vsel_reg = DA9063_REG_V##regl_name##_B, \
95 	.mode = BFIELD(DA9063_REG_##regl_name##_CFG, DA9063_BUCK_MODE_MASK)
96 
97 /* Defines asignment of regulators info table to chip model */
98 struct da9063_dev_model {
99 	const struct da9063_regulator_info	*regulator_info;
100 	unsigned				n_regulators;
101 	unsigned				dev_model;
102 };
103 
104 /* Single regulator settings */
105 struct da9063_regulator {
106 	struct regulator_desc			desc;
107 	struct regulator_dev			*rdev;
108 	struct da9063				*hw;
109 	const struct da9063_regulator_info	*info;
110 
111 	struct regmap_field			*mode;
112 	struct regmap_field			*suspend;
113 	struct regmap_field			*sleep;
114 	struct regmap_field			*suspend_sleep;
115 	struct regmap_field			*ilimit;
116 };
117 
118 /* Encapsulates all information for the regulators driver */
119 struct da9063_regulators {
120 	unsigned				n_regulators;
121 	/* Array size to be defined during init. Keep at end. */
122 	struct da9063_regulator			regulator[0];
123 };
124 
125 /* BUCK modes for DA9063 */
126 enum {
127 	BUCK_MODE_MANUAL,	/* 0 */
128 	BUCK_MODE_SLEEP,	/* 1 */
129 	BUCK_MODE_SYNC,		/* 2 */
130 	BUCK_MODE_AUTO		/* 3 */
131 };
132 
133 /* Regulator operations */
134 
135 /* Current limits array (in uA) for BCORE1, BCORE2, BPRO.
136    Entry indexes corresponds to register values. */
137 static const int da9063_buck_a_limits[] = {
138 	 500000,  600000,  700000,  800000,  900000, 1000000, 1100000, 1200000,
139 	1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
140 };
141 
142 /* Current limits array (in uA) for BMEM, BIO, BPERI.
143    Entry indexes corresponds to register values. */
144 static const int da9063_buck_b_limits[] = {
145 	1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
146 	2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
147 };
148 
149 /* Current limits array (in uA) for merged BCORE1 and BCORE2.
150    Entry indexes corresponds to register values. */
151 static const int da9063_bcores_merged_limits[] = {
152 	1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000,
153 	2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000
154 };
155 
156 /* Current limits array (in uA) for merged BMEM and BIO.
157    Entry indexes corresponds to register values. */
158 static const int da9063_bmem_bio_merged_limits[] = {
159 	3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
160 	4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
161 };
162 
163 static int da9063_set_current_limit(struct regulator_dev *rdev,
164 							int min_uA, int max_uA)
165 {
166 	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
167 	const struct da9063_regulator_info *rinfo = regl->info;
168 	int n, tval;
169 
170 	for (n = 0; n < rinfo->n_current_limits; n++) {
171 		tval = rinfo->current_limits[n];
172 		if (tval >= min_uA && tval <= max_uA)
173 			return regmap_field_write(regl->ilimit, n);
174 	}
175 
176 	return -EINVAL;
177 }
178 
179 static int da9063_get_current_limit(struct regulator_dev *rdev)
180 {
181 	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
182 	const struct da9063_regulator_info *rinfo = regl->info;
183 	unsigned int sel;
184 	int ret;
185 
186 	ret = regmap_field_read(regl->ilimit, &sel);
187 	if (ret < 0)
188 		return ret;
189 
190 	if (sel >= rinfo->n_current_limits)
191 		sel = rinfo->n_current_limits - 1;
192 
193 	return rinfo->current_limits[sel];
194 }
195 
196 static int da9063_buck_set_mode(struct regulator_dev *rdev, unsigned mode)
197 {
198 	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
199 	unsigned val;
200 
201 	switch (mode) {
202 	case REGULATOR_MODE_FAST:
203 		val = BUCK_MODE_SYNC;
204 		break;
205 	case REGULATOR_MODE_NORMAL:
206 		val = BUCK_MODE_AUTO;
207 		break;
208 	case REGULATOR_MODE_STANDBY:
209 		val = BUCK_MODE_SLEEP;
210 		break;
211 	default:
212 		return -EINVAL;
213 	}
214 
215 	return regmap_field_write(regl->mode, val);
216 }
217 
218 /*
219  * Bucks use single mode register field for normal operation
220  * and suspend state.
221  * There are 3 modes to map to: FAST, NORMAL, and STANDBY.
222  */
223 
224 static unsigned da9063_buck_get_mode(struct regulator_dev *rdev)
225 {
226 	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
227 	struct regmap_field *field;
228 	unsigned int val, mode = 0;
229 	int ret;
230 
231 	ret = regmap_field_read(regl->mode, &val);
232 	if (ret < 0)
233 		return ret;
234 
235 	switch (val) {
236 	default:
237 	case BUCK_MODE_MANUAL:
238 		mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY;
239 		/* Sleep flag bit decides the mode */
240 		break;
241 	case BUCK_MODE_SLEEP:
242 		return REGULATOR_MODE_STANDBY;
243 	case BUCK_MODE_SYNC:
244 		return REGULATOR_MODE_FAST;
245 	case BUCK_MODE_AUTO:
246 		return REGULATOR_MODE_NORMAL;
247 	}
248 
249 	/* Detect current regulator state */
250 	ret = regmap_field_read(regl->suspend, &val);
251 	if (ret < 0)
252 		return 0;
253 
254 	/* Read regulator mode from proper register, depending on state */
255 	if (val)
256 		field = regl->suspend_sleep;
257 	else
258 		field = regl->sleep;
259 
260 	ret = regmap_field_read(field, &val);
261 	if (ret < 0)
262 		return 0;
263 
264 	if (val)
265 		mode &= REGULATOR_MODE_STANDBY;
266 	else
267 		mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST;
268 
269 	return mode;
270 }
271 
272 /*
273  * LDOs use sleep flags - one for normal and one for suspend state.
274  * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state.
275  */
276 
277 static int da9063_ldo_set_mode(struct regulator_dev *rdev, unsigned mode)
278 {
279 	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
280 	unsigned val;
281 
282 	switch (mode) {
283 	case REGULATOR_MODE_NORMAL:
284 		val = 0;
285 		break;
286 	case REGULATOR_MODE_STANDBY:
287 		val = 1;
288 		break;
289 	default:
290 		return -EINVAL;
291 	}
292 
293 	return regmap_field_write(regl->sleep, val);
294 }
295 
296 static unsigned da9063_ldo_get_mode(struct regulator_dev *rdev)
297 {
298 	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
299 	struct regmap_field *field;
300 	int ret, val;
301 
302 	/* Detect current regulator state */
303 	ret = regmap_field_read(regl->suspend, &val);
304 	if (ret < 0)
305 		return 0;
306 
307 	/* Read regulator mode from proper register, depending on state */
308 	if (val)
309 		field = regl->suspend_sleep;
310 	else
311 		field = regl->sleep;
312 
313 	ret = regmap_field_read(field, &val);
314 	if (ret < 0)
315 		return 0;
316 
317 	if (val)
318 		return REGULATOR_MODE_STANDBY;
319 	else
320 		return REGULATOR_MODE_NORMAL;
321 }
322 
323 static int da9063_buck_get_status(struct regulator_dev *rdev)
324 {
325 	int ret = regulator_is_enabled_regmap(rdev);
326 
327 	if (ret == 0) {
328 		ret = REGULATOR_STATUS_OFF;
329 	} else if (ret > 0) {
330 		ret = da9063_buck_get_mode(rdev);
331 		if (ret > 0)
332 			ret = regulator_mode_to_status(ret);
333 		else if (ret == 0)
334 			ret = -EIO;
335 	}
336 
337 	return ret;
338 }
339 
340 static int da9063_ldo_get_status(struct regulator_dev *rdev)
341 {
342 	int ret = regulator_is_enabled_regmap(rdev);
343 
344 	if (ret == 0) {
345 		ret = REGULATOR_STATUS_OFF;
346 	} else if (ret > 0) {
347 		ret = da9063_ldo_get_mode(rdev);
348 		if (ret > 0)
349 			ret = regulator_mode_to_status(ret);
350 		else if (ret == 0)
351 			ret = -EIO;
352 	}
353 
354 	return ret;
355 }
356 
357 static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV)
358 {
359 	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
360 	const struct da9063_regulator_info *rinfo = regl->info;
361 	int ret, sel;
362 
363 	sel = regulator_map_voltage_linear(rdev, uV, uV);
364 	if (sel < 0)
365 		return sel;
366 
367 	sel <<= ffs(rdev->desc->vsel_mask) - 1;
368 
369 	ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg,
370 				 rdev->desc->vsel_mask, sel);
371 
372 	return ret;
373 }
374 
375 static int da9063_suspend_enable(struct regulator_dev *rdev)
376 {
377 	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
378 
379 	return regmap_field_write(regl->suspend, 1);
380 }
381 
382 static int da9063_suspend_disable(struct regulator_dev *rdev)
383 {
384 	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
385 
386 	return regmap_field_write(regl->suspend, 0);
387 }
388 
389 static int da9063_buck_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
390 {
391 	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
392 	int val;
393 
394 	switch (mode) {
395 	case REGULATOR_MODE_FAST:
396 		val = BUCK_MODE_SYNC;
397 		break;
398 	case REGULATOR_MODE_NORMAL:
399 		val = BUCK_MODE_AUTO;
400 		break;
401 	case REGULATOR_MODE_STANDBY:
402 		val = BUCK_MODE_SLEEP;
403 		break;
404 	default:
405 		return -EINVAL;
406 	}
407 
408 	return regmap_field_write(regl->mode, val);
409 }
410 
411 static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
412 {
413 	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
414 	unsigned val;
415 
416 	switch (mode) {
417 	case REGULATOR_MODE_NORMAL:
418 		val = 0;
419 		break;
420 	case REGULATOR_MODE_STANDBY:
421 		val = 1;
422 		break;
423 	default:
424 		return -EINVAL;
425 	}
426 
427 	return regmap_field_write(regl->suspend_sleep, val);
428 }
429 
430 static const struct regulator_ops da9063_buck_ops = {
431 	.enable			= regulator_enable_regmap,
432 	.disable		= regulator_disable_regmap,
433 	.is_enabled		= regulator_is_enabled_regmap,
434 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
435 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
436 	.list_voltage		= regulator_list_voltage_linear,
437 	.set_current_limit	= da9063_set_current_limit,
438 	.get_current_limit	= da9063_get_current_limit,
439 	.set_mode		= da9063_buck_set_mode,
440 	.get_mode		= da9063_buck_get_mode,
441 	.get_status		= da9063_buck_get_status,
442 	.set_suspend_voltage	= da9063_set_suspend_voltage,
443 	.set_suspend_enable	= da9063_suspend_enable,
444 	.set_suspend_disable	= da9063_suspend_disable,
445 	.set_suspend_mode	= da9063_buck_set_suspend_mode,
446 };
447 
448 static const struct regulator_ops da9063_ldo_ops = {
449 	.enable			= regulator_enable_regmap,
450 	.disable		= regulator_disable_regmap,
451 	.is_enabled		= regulator_is_enabled_regmap,
452 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
453 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
454 	.list_voltage		= regulator_list_voltage_linear,
455 	.set_mode		= da9063_ldo_set_mode,
456 	.get_mode		= da9063_ldo_get_mode,
457 	.get_status		= da9063_ldo_get_status,
458 	.set_suspend_voltage	= da9063_set_suspend_voltage,
459 	.set_suspend_enable	= da9063_suspend_enable,
460 	.set_suspend_disable	= da9063_suspend_disable,
461 	.set_suspend_mode	= da9063_ldo_set_suspend_mode,
462 };
463 
464 /* Info of regulators for DA9063 */
465 static const struct da9063_regulator_info da9063_regulator_info[] = {
466 	{
467 		DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570,
468 			    da9063_buck_a_limits),
469 		DA9063_BUCK_COMMON_FIELDS(BCORE1),
470 		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
471 		.ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
472 				 DA9063_BCORE1_ILIM_MASK),
473 	},
474 	{
475 		DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
476 			    da9063_buck_a_limits),
477 		DA9063_BUCK_COMMON_FIELDS(BCORE2),
478 		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE2_SEL),
479 		.ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
480 				 DA9063_BCORE2_ILIM_MASK),
481 	},
482 	{
483 		DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
484 			    da9063_buck_a_limits),
485 		DA9063_BUCK_COMMON_FIELDS(BPRO),
486 		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPRO_SEL),
487 		.ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
488 				 DA9063_BPRO_ILIM_MASK),
489 	},
490 	{
491 		DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
492 			    da9063_buck_b_limits),
493 		DA9063_BUCK_COMMON_FIELDS(BMEM),
494 		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
495 		.ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
496 				 DA9063_BMEM_ILIM_MASK),
497 	},
498 	{
499 		DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
500 			    da9063_buck_b_limits),
501 		DA9063_BUCK_COMMON_FIELDS(BIO),
502 		.suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VBIO_SEL),
503 		.ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
504 				 DA9063_BIO_ILIM_MASK),
505 	},
506 	{
507 		DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
508 			    da9063_buck_b_limits),
509 		DA9063_BUCK_COMMON_FIELDS(BPERI),
510 		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPERI_SEL),
511 		.ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
512 				 DA9063_BPERI_ILIM_MASK),
513 	},
514 	{
515 		DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
516 			    da9063_bcores_merged_limits),
517 		/* BCORES_MERGED uses the same register fields as BCORE1 */
518 		DA9063_BUCK_COMMON_FIELDS(BCORE1),
519 		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
520 		.ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
521 				 DA9063_BCORE1_ILIM_MASK),
522 	},
523 	{
524 		DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
525 			    da9063_bmem_bio_merged_limits),
526 		/* BMEM_BIO_MERGED uses the same register fields as BMEM */
527 		DA9063_BUCK_COMMON_FIELDS(BMEM),
528 		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
529 		.ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
530 				 DA9063_BMEM_ILIM_MASK),
531 	},
532 	{
533 		DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
534 		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL),
535 	},
536 	{
537 		DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
538 		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL),
539 	},
540 	{
541 		DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
542 		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL),
543 		.oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
544 	},
545 	{
546 		DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
547 		.suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL),
548 		.oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
549 	},
550 	{
551 		DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
552 		.suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL),
553 	},
554 	{
555 		DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
556 		.suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL),
557 	},
558 	{
559 		DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
560 		.suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL),
561 		.oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
562 	},
563 	{
564 		DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
565 		.suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL),
566 		.oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
567 	},
568 	{
569 		DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
570 		.suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
571 	},
572 	{
573 		DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
574 		.suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL),
575 	},
576 	{
577 		DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
578 		.suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL),
579 		.oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
580 	},
581 };
582 
583 /* Link chip model with regulators info table */
584 static struct da9063_dev_model regulators_models[] = {
585 	{
586 		.regulator_info = da9063_regulator_info,
587 		.n_regulators = ARRAY_SIZE(da9063_regulator_info),
588 		.dev_model = PMIC_DA9063,
589 	},
590 	{ }
591 };
592 
593 /* Regulator interrupt handlers */
594 static irqreturn_t da9063_ldo_lim_event(int irq, void *data)
595 {
596 	struct da9063_regulators *regulators = data;
597 	struct da9063 *hw = regulators->regulator[0].hw;
598 	struct da9063_regulator *regl;
599 	int bits, i , ret;
600 
601 	ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
602 	if (ret < 0)
603 		return IRQ_NONE;
604 
605 	for (i = regulators->n_regulators - 1; i >= 0; i--) {
606 		regl = &regulators->regulator[i];
607 		if (regl->info->oc_event.reg != DA9063_REG_STATUS_D)
608 			continue;
609 
610 		if (BIT(regl->info->oc_event.lsb) & bits)
611 			regulator_notifier_call_chain(regl->rdev,
612 					REGULATOR_EVENT_OVER_CURRENT, NULL);
613 	}
614 
615 	return IRQ_HANDLED;
616 }
617 
618 /*
619  * Probing and Initialisation functions
620  */
621 static const struct regulator_init_data *da9063_get_regulator_initdata(
622 		const struct da9063_regulators_pdata *regl_pdata, int id)
623 {
624 	int i;
625 
626 	for (i = 0; i < regl_pdata->n_regulators; i++) {
627 		if (id == regl_pdata->regulator_data[i].id)
628 			return regl_pdata->regulator_data[i].initdata;
629 	}
630 
631 	return NULL;
632 }
633 
634 #ifdef CONFIG_OF
635 static struct of_regulator_match da9063_matches[] = {
636 	[DA9063_ID_BCORE1]           = { .name = "bcore1"           },
637 	[DA9063_ID_BCORE2]           = { .name = "bcore2"           },
638 	[DA9063_ID_BPRO]             = { .name = "bpro",            },
639 	[DA9063_ID_BMEM]             = { .name = "bmem",            },
640 	[DA9063_ID_BIO]              = { .name = "bio",             },
641 	[DA9063_ID_BPERI]            = { .name = "bperi",           },
642 	[DA9063_ID_BCORES_MERGED]    = { .name = "bcores-merged"    },
643 	[DA9063_ID_BMEM_BIO_MERGED]  = { .name = "bmem-bio-merged", },
644 	[DA9063_ID_LDO1]             = { .name = "ldo1",            },
645 	[DA9063_ID_LDO2]             = { .name = "ldo2",            },
646 	[DA9063_ID_LDO3]             = { .name = "ldo3",            },
647 	[DA9063_ID_LDO4]             = { .name = "ldo4",            },
648 	[DA9063_ID_LDO5]             = { .name = "ldo5",            },
649 	[DA9063_ID_LDO6]             = { .name = "ldo6",            },
650 	[DA9063_ID_LDO7]             = { .name = "ldo7",            },
651 	[DA9063_ID_LDO8]             = { .name = "ldo8",            },
652 	[DA9063_ID_LDO9]             = { .name = "ldo9",            },
653 	[DA9063_ID_LDO10]            = { .name = "ldo10",           },
654 	[DA9063_ID_LDO11]            = { .name = "ldo11",           },
655 };
656 
657 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
658 		struct platform_device *pdev,
659 		struct of_regulator_match **da9063_reg_matches)
660 {
661 	struct da9063_regulators_pdata *pdata;
662 	struct da9063_regulator_data *rdata;
663 	struct device_node *node;
664 	int i, n, num;
665 
666 	node = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
667 	if (!node) {
668 		dev_err(&pdev->dev, "Regulators device node not found\n");
669 		return ERR_PTR(-ENODEV);
670 	}
671 
672 	num = of_regulator_match(&pdev->dev, node, da9063_matches,
673 				 ARRAY_SIZE(da9063_matches));
674 	of_node_put(node);
675 	if (num < 0) {
676 		dev_err(&pdev->dev, "Failed to match regulators\n");
677 		return ERR_PTR(-EINVAL);
678 	}
679 
680 	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
681 	if (!pdata)
682 		return ERR_PTR(-ENOMEM);
683 
684 	pdata->regulator_data = devm_kzalloc(&pdev->dev,
685 					num * sizeof(*pdata->regulator_data),
686 					GFP_KERNEL);
687 	if (!pdata->regulator_data)
688 		return ERR_PTR(-ENOMEM);
689 	pdata->n_regulators = num;
690 
691 	n = 0;
692 	for (i = 0; i < ARRAY_SIZE(da9063_matches); i++) {
693 		if (!da9063_matches[i].init_data)
694 			continue;
695 
696 		rdata = &pdata->regulator_data[n];
697 		rdata->id = i;
698 		rdata->initdata = da9063_matches[i].init_data;
699 
700 		n++;
701 	}
702 
703 	*da9063_reg_matches = da9063_matches;
704 	return pdata;
705 }
706 #else
707 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
708 		struct platform_device *pdev,
709 		struct of_regulator_match **da9063_reg_matches)
710 {
711 	*da9063_reg_matches = NULL;
712 	return ERR_PTR(-ENODEV);
713 }
714 #endif
715 
716 static int da9063_regulator_probe(struct platform_device *pdev)
717 {
718 	struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
719 	struct da9063_pdata *da9063_pdata = dev_get_platdata(da9063->dev);
720 	struct of_regulator_match *da9063_reg_matches = NULL;
721 	struct da9063_regulators_pdata *regl_pdata;
722 	const struct da9063_dev_model *model;
723 	struct da9063_regulators *regulators;
724 	struct da9063_regulator *regl;
725 	struct regulator_config config;
726 	bool bcores_merged, bmem_bio_merged;
727 	int id, irq, n, n_regulators, ret, val;
728 	size_t size;
729 
730 	regl_pdata = da9063_pdata ? da9063_pdata->regulators_pdata : NULL;
731 
732 	if (!regl_pdata)
733 		regl_pdata = da9063_parse_regulators_dt(pdev,
734 							&da9063_reg_matches);
735 
736 	if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
737 		dev_err(&pdev->dev,
738 			"No regulators defined for the platform\n");
739 		return PTR_ERR(regl_pdata);
740 	}
741 
742 	/* Find regulators set for particular device model */
743 	for (model = regulators_models; model->regulator_info; model++) {
744 		if (model->dev_model == da9063->model)
745 			break;
746 	}
747 	if (!model->regulator_info) {
748 		dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
749 			da9063->model);
750 		return -ENODEV;
751 	}
752 
753 	ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
754 	if (ret < 0) {
755 		dev_err(&pdev->dev,
756 			"Error while reading BUCKs configuration\n");
757 		return ret;
758 	}
759 	bcores_merged = val & DA9063_BCORE_MERGE;
760 	bmem_bio_merged = val & DA9063_BUCK_MERGE;
761 
762 	n_regulators = model->n_regulators;
763 	if (bcores_merged)
764 		n_regulators -= 2; /* remove BCORE1, BCORE2 */
765 	else
766 		n_regulators--;    /* remove BCORES_MERGED */
767 	if (bmem_bio_merged)
768 		n_regulators -= 2; /* remove BMEM, BIO */
769 	else
770 		n_regulators--;    /* remove BMEM_BIO_MERGED */
771 
772 	/* Allocate memory required by usable regulators */
773 	size = sizeof(struct da9063_regulators) +
774 		n_regulators * sizeof(struct da9063_regulator);
775 	regulators = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
776 	if (!regulators)
777 		return -ENOMEM;
778 
779 	regulators->n_regulators = n_regulators;
780 	platform_set_drvdata(pdev, regulators);
781 
782 	/* Register all regulators declared in platform information */
783 	n = 0;
784 	id = 0;
785 	while (n < regulators->n_regulators) {
786 		/* Skip regulator IDs depending on merge mode configuration */
787 		switch (id) {
788 		case DA9063_ID_BCORE1:
789 		case DA9063_ID_BCORE2:
790 			if (bcores_merged) {
791 				id++;
792 				continue;
793 			}
794 			break;
795 		case DA9063_ID_BMEM:
796 		case DA9063_ID_BIO:
797 			if (bmem_bio_merged) {
798 				id++;
799 				continue;
800 			}
801 			break;
802 		case DA9063_ID_BCORES_MERGED:
803 			if (!bcores_merged) {
804 				id++;
805 				continue;
806 			}
807 			break;
808 		case DA9063_ID_BMEM_BIO_MERGED:
809 			if (!bmem_bio_merged) {
810 				id++;
811 				continue;
812 			}
813 			break;
814 		}
815 
816 		/* Initialise regulator structure */
817 		regl = &regulators->regulator[n];
818 		regl->hw = da9063;
819 		regl->info = &model->regulator_info[id];
820 		regl->desc = regl->info->desc;
821 		regl->desc.type = REGULATOR_VOLTAGE;
822 		regl->desc.owner = THIS_MODULE;
823 
824 		if (regl->info->mode.reg)
825 			regl->mode = devm_regmap_field_alloc(&pdev->dev,
826 					da9063->regmap, regl->info->mode);
827 		if (regl->info->suspend.reg)
828 			regl->suspend = devm_regmap_field_alloc(&pdev->dev,
829 					da9063->regmap, regl->info->suspend);
830 		if (regl->info->sleep.reg)
831 			regl->sleep = devm_regmap_field_alloc(&pdev->dev,
832 					da9063->regmap, regl->info->sleep);
833 		if (regl->info->suspend_sleep.reg)
834 			regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
835 					da9063->regmap, regl->info->suspend_sleep);
836 		if (regl->info->ilimit.reg)
837 			regl->ilimit = devm_regmap_field_alloc(&pdev->dev,
838 					da9063->regmap, regl->info->ilimit);
839 
840 		/* Register regulator */
841 		memset(&config, 0, sizeof(config));
842 		config.dev = &pdev->dev;
843 		config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
844 		config.driver_data = regl;
845 		if (da9063_reg_matches)
846 			config.of_node = da9063_reg_matches[id].of_node;
847 		config.regmap = da9063->regmap;
848 		regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
849 						     &config);
850 		if (IS_ERR(regl->rdev)) {
851 			dev_err(&pdev->dev,
852 				"Failed to register %s regulator\n",
853 				regl->desc.name);
854 			return PTR_ERR(regl->rdev);
855 		}
856 		id++;
857 		n++;
858 	}
859 
860 	/* LDOs overcurrent event support */
861 	irq = platform_get_irq_byname(pdev, "LDO_LIM");
862 	if (irq < 0) {
863 		dev_err(&pdev->dev, "Failed to get IRQ.\n");
864 		return irq;
865 	}
866 
867 	ret = devm_request_threaded_irq(&pdev->dev, irq,
868 				NULL, da9063_ldo_lim_event,
869 				IRQF_TRIGGER_LOW | IRQF_ONESHOT,
870 				"LDO_LIM", regulators);
871 	if (ret) {
872 		dev_err(&pdev->dev, "Failed to request LDO_LIM IRQ.\n");
873 		return ret;
874 	}
875 
876 	return 0;
877 }
878 
879 static struct platform_driver da9063_regulator_driver = {
880 	.driver = {
881 		.name = DA9063_DRVNAME_REGULATORS,
882 	},
883 	.probe = da9063_regulator_probe,
884 };
885 
886 static int __init da9063_regulator_init(void)
887 {
888 	return platform_driver_register(&da9063_regulator_driver);
889 }
890 subsys_initcall(da9063_regulator_init);
891 
892 static void __exit da9063_regulator_cleanup(void)
893 {
894 	platform_driver_unregister(&da9063_regulator_driver);
895 }
896 module_exit(da9063_regulator_cleanup);
897 
898 
899 /* Module information */
900 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
901 MODULE_DESCRIPTION("DA9063 regulators driver");
902 MODULE_LICENSE("GPL");
903 MODULE_ALIAS("platform:" DA9063_DRVNAME_REGULATORS);
904