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regulator: da9063: Add Dialog DA9063 voltage regulators support.
[deliverable/linux.git] / drivers / regulator / da9063-regulator.c
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KG		 1/*
2 * Regulator driver for DA9063 PMIC series
3 *
4 * Copyright 2012 Dialog Semiconductors Ltd.
5 * Copyright 2013 Philipp Zabel, Pengutronix
6 *
7 * Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 */
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/err.h>
19#include <linux/slab.h>
20#include <linux/of.h>
21#include <linux/platform_device.h>
22#include <linux/regmap.h>
23#include <linux/regulator/driver.h>
24#include <linux/regulator/machine.h>
25#include <linux/regulator/of_regulator.h>
26#include <linux/mfd/da9063/core.h>
27#include <linux/mfd/da9063/pdata.h>
28#include <linux/mfd/da9063/registers.h>
29
30
31/* Definition for registering regmap bit fields using a mask */
32#define BFIELD(_reg, _mask) \
33 REG_FIELD(_reg, __builtin_ffs((int)_mask) - 1, \
34 sizeof(unsigned int) * 8 - __builtin_clz((_mask)) - 1)
35
36/* Regulator capabilities and registers description */
37struct da9063_regulator_info {
38 struct regulator_desc desc;
39
40 /* Current limiting */
41 unsigned n_current_limits;
42 const int *current_limits;
43
44 /* DA9063 main register fields */
45 struct reg_field mode; /* buck mode of operation */
46 struct reg_field suspend;
47 struct reg_field sleep;
48 struct reg_field suspend_sleep;
49 unsigned int suspend_vsel_reg;
50 struct reg_field ilimit;
51
52 /* DA9063 event detection bit */
53 struct reg_field oc_event;
54};
55
56/* Macros for LDO */
57#define DA9063_LDO(chip, regl_name, min_mV, step_mV, max_mV) \
58 .desc.id = chip##_ID_##regl_name, \
59 .desc.name = __stringify(chip##_##regl_name), \
60 .desc.ops = &da9063_ldo_ops, \
61 .desc.min_uV = (min_mV) * 1000, \
62 .desc.uV_step = (step_mV) * 1000, \
63 .desc.n_voltages = (((max_mV) - (min_mV))/(step_mV) + 1), \
64 .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
65 .desc.enable_mask = DA9063_LDO_EN, \
66 .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
67 .desc.vsel_mask = DA9063_V##regl_name##_MASK, \
68 .desc.linear_min_sel = DA9063_V##regl_name##_BIAS, \
69 .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_LDO_SL), \
70 .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_LDO_SL), \
71 .suspend_vsel_reg = DA9063_REG_V##regl_name##_B
72
73/* Macros for voltage DC/DC converters (BUCKs) */
74#define DA9063_BUCK(chip, regl_name, min_mV, step_mV, max_mV, limits_array) \
75 .desc.id = chip##_ID_##regl_name, \
76 .desc.name = __stringify(chip##_##regl_name), \
77 .desc.ops = &da9063_buck_ops, \
78 .desc.min_uV = (min_mV) * 1000, \
79 .desc.uV_step = (step_mV) * 1000, \
80 .desc.n_voltages = ((max_mV) - (min_mV))/(step_mV) + 1, \
81 .current_limits = limits_array, \
82 .n_current_limits = ARRAY_SIZE(limits_array)
83
84#define DA9063_BUCK_COMMON_FIELDS(regl_name) \
85 .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
86 .desc.enable_mask = DA9063_BUCK_EN, \
87 .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
88 .desc.vsel_mask = DA9063_VBUCK_MASK, \
89 .desc.linear_min_sel = DA9063_VBUCK_BIAS, \
90 .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_BUCK_SL), \
91 .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_BUCK_SL), \
92 .suspend_vsel_reg = DA9063_REG_V##regl_name##_B, \
93 .mode = BFIELD(DA9063_REG_##regl_name##_CFG, DA9063_BUCK_MODE_MASK)
94
95/* Defines asignment of regulators info table to chip model */
96struct da9063_dev_model {
97 const struct da9063_regulator_info *regulator_info;
98 unsigned n_regulators;
99 unsigned dev_model;
100};
101
102/* Single regulator settings */
103struct da9063_regulator {
104 struct regulator_desc desc;
105 struct regulator_dev *rdev;
106 struct da9063 *hw;
107 const struct da9063_regulator_info *info;
108
109 struct regmap_field *mode;
110 struct regmap_field *suspend;
111 struct regmap_field *sleep;
112 struct regmap_field *suspend_sleep;
113 struct regmap_field *ilimit;
114};
115
116/* Encapsulates all information for the regulators driver */
117struct da9063_regulators {
118 int irq_ldo_lim;
119 int irq_uvov;
120
121 unsigned n_regulators;
122 /* Array size to be defined during init. Keep at end. */
123 struct da9063_regulator regulator[0];
124};
125
126/* BUCK modes for DA9063 */
127enum {
128 BUCK_MODE_MANUAL, /* 0 */
129 BUCK_MODE_SLEEP, /* 1 */
130 BUCK_MODE_SYNC, /* 2 */
131 BUCK_MODE_AUTO /* 3 */
132};
133
134/* Regulator operations */
135
136/* Current limits array (in uA) for BCORE1, BCORE2, BPRO.
137 Entry indexes corresponds to register values. */
138static const int da9063_buck_a_limits[] = {
139 500000, 600000, 700000, 800000, 900000, 1000000, 1100000, 1200000,
140 1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
141};
142
143/* Current limits array (in uA) for BMEM, BIO, BPERI.
144 Entry indexes corresponds to register values. */
145static const int da9063_buck_b_limits[] = {
146 1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
147 2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
148};
149
150/* Current limits array (in uA) for merged BCORE1 and BCORE2.
151 Entry indexes corresponds to register values. */
152static const int da9063_bcores_merged_limits[] = {
153 1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000,
154 2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000
155};
156
157/* Current limits array (in uA) for merged BMEM and BIO.
158 Entry indexes corresponds to register values. */
159static const int da9063_bmem_bio_merged_limits[] = {
160 3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
161 4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
162};
163
164static int da9063_set_current_limit(struct regulator_dev *rdev,
165 int min_uA, int max_uA)
166{
167 struct da9063_regulator *regl = rdev_get_drvdata(rdev);
168 const struct da9063_regulator_info *rinfo = regl->info;
169 int val = INT_MAX;
170 unsigned sel = 0;
171 int n;
172 int tval;
173
174 for (n = 0; n < rinfo->n_current_limits; n++) {
175 tval = rinfo->current_limits[n];
176 if (tval >= min_uA && tval <= max_uA && val > tval) {
177 val = tval;
178 sel = n;
179 }
180 }
181 if (val == INT_MAX)
182 return -EINVAL;
183
184 return regmap_field_write(regl->ilimit, sel);
185}
186
187static int da9063_get_current_limit(struct regulator_dev *rdev)
188{
189 struct da9063_regulator *regl = rdev_get_drvdata(rdev);
190 const struct da9063_regulator_info *rinfo = regl->info;
191 unsigned int sel;
192 int ret;
193
194 ret = regmap_field_read(regl->ilimit, &sel);
195 if (ret < 0)
196 return ret;
197
198 if (sel >= rinfo->n_current_limits)
199 sel = rinfo->n_current_limits - 1;
200
201 return rinfo->current_limits[sel];
202}
203
204static int da9063_buck_set_mode(struct regulator_dev *rdev, unsigned mode)
205{
206 struct da9063_regulator *regl = rdev_get_drvdata(rdev);
207 unsigned val;
208
209 switch (mode) {
210 case REGULATOR_MODE_FAST:
211 val = BUCK_MODE_SYNC;
212 break;
213 case REGULATOR_MODE_NORMAL:
214 val = BUCK_MODE_AUTO;
215 break;
216 case REGULATOR_MODE_STANDBY:
217 val = BUCK_MODE_SLEEP;
218 break;
219 default:
220 return -EINVAL;
221 }
222
223 return regmap_field_write(regl->mode, val);
224}
225
226/*
227 * Bucks use single mode register field for normal operation
228 * and suspend state.
229 * There are 3 modes to map to: FAST, NORMAL, and STANDBY.
230 */
231
232static unsigned da9063_buck_get_mode(struct regulator_dev *rdev)
233{
234 struct da9063_regulator *regl = rdev_get_drvdata(rdev);
235 struct regmap_field *field;
236 unsigned int val, mode = 0;
237 int ret;
238
239 ret = regmap_field_read(regl->mode, &val);
240 if (ret < 0)
241 return ret;
242
243 switch (val) {
244 default:
245 case BUCK_MODE_MANUAL:
246 mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY;
247 /* Sleep flag bit decides the mode */
248 break;
249 case BUCK_MODE_SLEEP:
250 return REGULATOR_MODE_STANDBY;
251 case BUCK_MODE_SYNC:
252 return REGULATOR_MODE_FAST;
253 case BUCK_MODE_AUTO:
254 return REGULATOR_MODE_NORMAL;
255 }
256
257 /* Detect current regulator state */
258 ret = regmap_field_read(regl->suspend, &val);
259 if (ret < 0)
260 return 0;
261
262 /* Read regulator mode from proper register, depending on state */
263 if (val)
264 field = regl->suspend_sleep;
265 else
266 field = regl->sleep;
267
268 ret = regmap_field_read(field, &val);
269 if (ret < 0)
270 return 0;
271
272 if (val)
273 mode &= REGULATOR_MODE_STANDBY;
274 else
275 mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST;
276
277 return mode;
278}
279
280/*
281 * LDOs use sleep flags - one for normal and one for suspend state.
282 * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state.
283 */
284
285static int da9063_ldo_set_mode(struct regulator_dev *rdev, unsigned mode)
286{
287 struct da9063_regulator *regl = rdev_get_drvdata(rdev);
288 unsigned val;
289
290 switch (mode) {
291 case REGULATOR_MODE_NORMAL:
292 val = 0;
293 break;
294 case REGULATOR_MODE_STANDBY:
295 val = 1;
296 break;
297 default:
298 return -EINVAL;
299 }
300
301 return regmap_field_write(regl->sleep, val);
302}
303
304static unsigned da9063_ldo_get_mode(struct regulator_dev *rdev)
305{
306 struct da9063_regulator *regl = rdev_get_drvdata(rdev);
307 struct regmap_field *field;
308 int ret, val;
309
310 /* Detect current regulator state */
311 ret = regmap_field_read(regl->suspend, &val);
312 if (ret < 0)
313 return 0;
314
315 /* Read regulator mode from proper register, depending on state */
316 if (val)
317 field = regl->suspend_sleep;
318 else
319 field = regl->sleep;
320
321 ret = regmap_field_read(field, &val);
322 if (ret < 0)
323 return 0;
324
325 if (val)
326 return REGULATOR_MODE_STANDBY;
327 else
328 return REGULATOR_MODE_NORMAL;
329}
330
331static int da9063_buck_get_status(struct regulator_dev *rdev)
332{
333 int ret = regulator_is_enabled_regmap(rdev);
334
335 if (ret == 0) {
336 ret = REGULATOR_STATUS_OFF;
337 } else if (ret > 0) {
338 ret = da9063_buck_get_mode(rdev);
339 if (ret > 0)
340 ret = regulator_mode_to_status(ret);
341 else if (ret == 0)
342 ret = -EIO;
343 }
344
345 return ret;
346}
347
348static int da9063_ldo_get_status(struct regulator_dev *rdev)
349{
350 int ret = regulator_is_enabled_regmap(rdev);
351
352 if (ret == 0) {
353 ret = REGULATOR_STATUS_OFF;
354 } else if (ret > 0) {
355 ret = da9063_ldo_get_mode(rdev);
356 if (ret > 0)
357 ret = regulator_mode_to_status(ret);
358 else if (ret == 0)
359 ret = -EIO;
360 }
361
362 return ret;
363}
364
365static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV)
366{
367 struct da9063_regulator *regl = rdev_get_drvdata(rdev);
368 const struct da9063_regulator_info *rinfo = regl->info;
369 int ret, sel;
370
371 sel = regulator_map_voltage_linear(rdev, uV, uV);
372 if (sel < 0)
373 return -EINVAL;
374
375 sel <<= ffs(rdev->desc->vsel_mask) - 1;
376
377 ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg,
378 rdev->desc->vsel_mask, sel);
379
380 return ret;
381}
382
383static int da9063_suspend_enable(struct regulator_dev *rdev)
384{
385 struct da9063_regulator *regl = rdev_get_drvdata(rdev);
386
387 return regmap_field_write(regl->suspend, 1);
388}
389
390static int da9063_suspend_disable(struct regulator_dev *rdev)
391{
392 struct da9063_regulator *regl = rdev_get_drvdata(rdev);
393
394 return regmap_field_write(regl->suspend, 0);
395}
396
397static int da9063_buck_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
398{
399 struct da9063_regulator *regl = rdev_get_drvdata(rdev);
400 int val;
401
402 switch (mode) {
403 case REGULATOR_MODE_FAST:
404 val = BUCK_MODE_SYNC;
405 break;
406 case REGULATOR_MODE_NORMAL:
407 val = BUCK_MODE_AUTO;
408 break;
409 case REGULATOR_MODE_STANDBY:
410 val = BUCK_MODE_SLEEP;
411 break;
412 default:
413 return -EINVAL;
414 }
415
416 return regmap_field_write(regl->mode, val);
417}
418
419static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
420{
421 struct da9063_regulator *regl = rdev_get_drvdata(rdev);
422 unsigned val;
423
424 switch (mode) {
425 case REGULATOR_MODE_NORMAL:
426 val = 0;
427 break;
428 case REGULATOR_MODE_STANDBY:
429 val = 1;
430 break;
431 default:
432 return -EINVAL;
433 }
434
435 return regmap_field_write(regl->suspend_sleep, val);
436}
437
438static struct regulator_ops da9063_buck_ops = {
439 .enable = regulator_enable_regmap,
440 .disable = regulator_disable_regmap,
441 .is_enabled = regulator_is_enabled_regmap,
442 .get_voltage_sel = regulator_get_voltage_sel_regmap,
443 .set_voltage_sel = regulator_set_voltage_sel_regmap,
444 .list_voltage = regulator_list_voltage_linear,
445 .set_current_limit = da9063_set_current_limit,
446 .get_current_limit = da9063_get_current_limit,
447 .set_mode = da9063_buck_set_mode,
448 .get_mode = da9063_buck_get_mode,
449 .get_status = da9063_buck_get_status,
450 .set_suspend_voltage = da9063_set_suspend_voltage,
451 .set_suspend_enable = da9063_suspend_enable,
452 .set_suspend_disable = da9063_suspend_disable,
453 .set_suspend_mode = da9063_buck_set_suspend_mode,
454};
455
456static struct regulator_ops da9063_ldo_ops = {
457 .enable = regulator_enable_regmap,
458 .disable = regulator_disable_regmap,
459 .is_enabled = regulator_is_enabled_regmap,
460 .get_voltage_sel = regulator_get_voltage_sel_regmap,
461 .set_voltage_sel = regulator_set_voltage_sel_regmap,
462 .list_voltage = regulator_list_voltage_linear,
463 .set_mode = da9063_ldo_set_mode,
464 .get_mode = da9063_ldo_get_mode,
465 .get_status = da9063_ldo_get_status,
466 .set_suspend_voltage = da9063_set_suspend_voltage,
467 .set_suspend_enable = da9063_suspend_enable,
468 .set_suspend_disable = da9063_suspend_disable,
469 .set_suspend_mode = da9063_ldo_set_suspend_mode,
470};
471
472/* Info of regulators for DA9063 */
473static const struct da9063_regulator_info da9063_regulator_info[] = {
474 {
475 DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570,
476 da9063_buck_a_limits),
477 DA9063_BUCK_COMMON_FIELDS(BCORE1),
478 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
479 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
480 DA9063_BCORE1_ILIM_MASK),
481 },
482 {
483 DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
484 da9063_buck_a_limits),
485 DA9063_BUCK_COMMON_FIELDS(BCORE2),
486 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE2_SEL),
487 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
488 DA9063_BCORE2_ILIM_MASK),
489 },
490 {
491 DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
492 da9063_buck_a_limits),
493 DA9063_BUCK_COMMON_FIELDS(BPRO),
494 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPRO_SEL),
495 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
496 DA9063_BPRO_ILIM_MASK),
497 },
498 {
499 DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
500 da9063_buck_b_limits),
501 DA9063_BUCK_COMMON_FIELDS(BMEM),
502 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
503 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
504 DA9063_BMEM_ILIM_MASK),
505 },
506 {
507 DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
508 da9063_buck_b_limits),
509 DA9063_BUCK_COMMON_FIELDS(BIO),
510 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VBIO_SEL),
511 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
512 DA9063_BIO_ILIM_MASK),
513 },
514 {
515 DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
516 da9063_buck_b_limits),
517 DA9063_BUCK_COMMON_FIELDS(BPERI),
518 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPERI_SEL),
519 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
520 DA9063_BPERI_ILIM_MASK),
521 },
522 {
523 DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
524 da9063_bcores_merged_limits),
525 /* BCORES_MERGED uses the same register fields as BCORE1 */
526 DA9063_BUCK_COMMON_FIELDS(BCORE1),
527 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
528 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
529 DA9063_BCORE1_ILIM_MASK),
530 },
531 {
532 DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
533 da9063_bmem_bio_merged_limits),
534 /* BMEM_BIO_MERGED uses the same register fields as BMEM */
535 DA9063_BUCK_COMMON_FIELDS(BMEM),
536 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
537 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
538 DA9063_BMEM_ILIM_MASK),
539 },
540 {
541 DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
542 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL),
543 },
544 {
545 DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
546 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL),
547 },
548 {
549 DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
550 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL),
551 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
552 },
553 {
554 DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
555 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL),
556 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
557 },
558 {
559 DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
560 .suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL),
561 },
562 {
563 DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
564 .suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL),
565 },
566 {
567 DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
568 .suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL),
569 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
570 },
571 {
572 DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
573 .suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL),
574 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
575 },
576 {
577 DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
578 .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
579 },
580 {
581 DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
582 .suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL),
583 },
584 {
585 DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
586 .suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL),
587 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
588 },
589};
590
591/* Link chip model with regulators info table */
592static struct da9063_dev_model regulators_models[] = {
593 {
594 .regulator_info = da9063_regulator_info,
595 .n_regulators = ARRAY_SIZE(da9063_regulator_info),
596 .dev_model = PMIC_DA9063,
597 },
598 { }
599};
600
601/* Regulator interrupt handlers */
602irqreturn_t da9063_ldo_lim_event(int irq, void *data)
603{
604 struct da9063_regulators *regulators = data;
605 struct da9063 *hw = regulators->regulator[0].hw;
606 struct da9063_regulator *regl;
607 int bits, i , ret;
608
609 ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
610 if (ret < 0)
611 return IRQ_NONE;
612
613 for (i = regulators->n_regulators - 1; i >= 0; i--) {
614 regl = &regulators->regulator[i];
615 if (regl->info->oc_event.reg != DA9063_REG_STATUS_D)
616 continue;
617
618 if (BIT(regl->info->oc_event.lsb) & bits)
619 regulator_notifier_call_chain(regl->rdev,
620 REGULATOR_EVENT_OVER_CURRENT, NULL);
621 }
622
623 return IRQ_HANDLED;
624}
625
626/*
627 * Probing and Initialisation functions
628 */
629static const struct regulator_init_data *da9063_get_regulator_initdata(
630 const struct da9063_regulators_pdata *regl_pdata, int id)
631{
632 int i;
633
634 for (i = 0; i < regl_pdata->n_regulators; i++) {
635 if (id == regl_pdata->regulator_data[i].id)
636 return regl_pdata->regulator_data[i].initdata;
637 }
638
639 return NULL;
640}
641
642#ifdef CONFIG_OF
643static struct of_regulator_match da9063_matches[] = {
644 [DA9063_ID_BCORE1] = { .name = "bcore1" },
645 [DA9063_ID_BCORE2] = { .name = "bcore2" },
646 [DA9063_ID_BPRO] = { .name = "bpro", },
647 [DA9063_ID_BMEM] = { .name = "bmem", },
648 [DA9063_ID_BIO] = { .name = "bio", },
649 [DA9063_ID_BPERI] = { .name = "bperi", },
650 [DA9063_ID_BCORES_MERGED] = { .name = "bcores-merged" },
651 [DA9063_ID_BMEM_BIO_MERGED] = { .name = "bmem-bio-merged", },
652 [DA9063_ID_LDO1] = { .name = "ldo1", },
653 [DA9063_ID_LDO2] = { .name = "ldo2", },
654 [DA9063_ID_LDO3] = { .name = "ldo3", },
655 [DA9063_ID_LDO4] = { .name = "ldo4", },
656 [DA9063_ID_LDO5] = { .name = "ldo5", },
657 [DA9063_ID_LDO6] = { .name = "ldo6", },
658 [DA9063_ID_LDO7] = { .name = "ldo7", },
659 [DA9063_ID_LDO8] = { .name = "ldo8", },
660 [DA9063_ID_LDO9] = { .name = "ldo9", },
661 [DA9063_ID_LDO10] = { .name = "ldo10", },
662 [DA9063_ID_LDO11] = { .name = "ldo11", },
663};
664
665static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
666 struct platform_device *pdev,
667 struct of_regulator_match **da9063_reg_matches)
668{
669 struct da9063_regulators_pdata *pdata;
670 struct da9063_regulator_data *rdata;
671 struct device_node *node;
672 int i, n, num;
673
674 node = of_find_node_by_name(pdev->dev.parent->of_node, "regulators");
675 if (!node) {
676 dev_err(&pdev->dev, "Regulators device node not found\n");
677 return ERR_PTR(-ENODEV);
678 }
679
680 num = of_regulator_match(&pdev->dev, node, da9063_matches,
681 ARRAY_SIZE(da9063_matches));
682 if (num < 0) {
683 dev_err(&pdev->dev, "Failed to match regulators\n");
684 return ERR_PTR(-EINVAL);
685 }
686
687 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
688 if (!pdata)
689 return ERR_PTR(-ENOMEM);
690
691 pdata->regulator_data = devm_kzalloc(&pdev->dev,
692 num * sizeof(*pdata->regulator_data),
693 GFP_KERNEL);
694 if (!pdata->regulator_data)
695 return ERR_PTR(-ENOMEM);
696 pdata->n_regulators = num;
697
698 n = 0;
699 for (i = 0; i < ARRAY_SIZE(da9063_matches); i++) {
700 if (!da9063_matches[i].init_data)
701 continue;
702
703 rdata = &pdata->regulator_data[n];
704 rdata->id = i;
705 rdata->initdata = da9063_matches[i].init_data;
706
707 n++;
708 };
709
710 *da9063_reg_matches = da9063_matches;
711 return pdata;
712}
713#else
714static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
715 struct platform_device *pdev,
716 struct of_regulator_match **da9063_reg_matches)
717{
718 da9063_reg_matches = NULL;
719 return PTR_ERR(-ENODEV);
720}
721#endif
722
723static int da9063_regulator_probe(struct platform_device *pdev)
724{
725 struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
726 struct da9063_pdata *da9063_pdata = dev_get_platdata(da9063->dev);
727 struct of_regulator_match *da9063_reg_matches;
728 struct da9063_regulators_pdata *regl_pdata;
729 const struct da9063_dev_model *model;
730 struct da9063_regulators *regulators;
731 struct da9063_regulator *regl;
732 struct regulator_config config;
733 bool bcores_merged, bmem_bio_merged;
734 int id, irq, n, n_regulators, ret, val;
735 size_t size;
736
737 regl_pdata = da9063_pdata ? da9063_pdata->regulators_pdata : NULL;
738
739 if (!regl_pdata)
740 regl_pdata = da9063_parse_regulators_dt(pdev,
741 &da9063_reg_matches);
742
743 if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
744 dev_err(&pdev->dev,
745 "No regulators defined for the platform\n");
746 return PTR_ERR(regl_pdata);
747 }
748
749 /* Find regulators set for particular device model */
750 for (model = regulators_models; model->regulator_info; model++) {
751 if (model->dev_model == da9063->model)
752 break;
753 }
754 if (!model->regulator_info) {
755 dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
756 da9063->model);
757 return -ENODEV;
758 }
759
760 ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
761 if (ret < 0) {
762 dev_err(&pdev->dev,
763 "Error while reading BUCKs configuration\n");
764 return -EIO;
765 }
766 bcores_merged = val & DA9063_BCORE_MERGE;
767 bmem_bio_merged = val & DA9063_BUCK_MERGE;
768
769 n_regulators = model->n_regulators;
770 if (bcores_merged)
771 n_regulators -= 2; /* remove BCORE1, BCORE2 */
772 else
773 n_regulators--; /* remove BCORES_MERGED */
774 if (bmem_bio_merged)
775 n_regulators -= 2; /* remove BMEM, BIO */
776 else
777 n_regulators--; /* remove BMEM_BIO_MERGED */
778
779 /* Allocate memory required by usable regulators */
780 size = sizeof(struct da9063_regulators) +
781 n_regulators * sizeof(struct da9063_regulator);
782 regulators = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
783 if (!regulators) {
784 dev_err(&pdev->dev, "No memory for regulators\n");
785 return -ENOMEM;
786 }
787
788 regulators->n_regulators = n_regulators;
789 platform_set_drvdata(pdev, regulators);
790
791 /* Register all regulators declared in platform information */
792 n = 0;
793 id = 0;
794 while (n < regulators->n_regulators) {
795 /* Skip regulator IDs depending on merge mode configuration */
796 switch (id) {
797 case DA9063_ID_BCORE1:
798 case DA9063_ID_BCORE2:
799 if (bcores_merged) {
800 id++;
801 continue;
802 }
803 break;
804 case DA9063_ID_BMEM:
805 case DA9063_ID_BIO:
806 if (bmem_bio_merged) {
807 id++;
808 continue;
809 }
810 break;
811 case DA9063_ID_BCORES_MERGED:
812 if (!bcores_merged) {
813 id++;
814 continue;
815 }
816 break;
817 case DA9063_ID_BMEM_BIO_MERGED:
818 if (!bmem_bio_merged) {
819 id++;
820 continue;
821 }
822 break;
823 }
824
825 /* Initialise regulator structure */
826 regl = &regulators->regulator[n];
827 regl->hw = da9063;
828 regl->info = &model->regulator_info[id];
829 regl->desc = regl->info->desc;
830 regl->desc.type = REGULATOR_VOLTAGE;
831 regl->desc.owner = THIS_MODULE;
832
833 if (regl->info->mode.reg)
834 regl->mode = devm_regmap_field_alloc(&pdev->dev,
835 da9063->regmap, regl->info->mode);
836 if (regl->info->suspend.reg)
837 regl->suspend = devm_regmap_field_alloc(&pdev->dev,
838 da9063->regmap, regl->info->suspend);
839 if (regl->info->sleep.reg)
840 regl->sleep = devm_regmap_field_alloc(&pdev->dev,
841 da9063->regmap, regl->info->sleep);
842 if (regl->info->suspend_sleep.reg)
843 regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
844 da9063->regmap, regl->info->suspend_sleep);
845 if (regl->info->ilimit.reg)
846 regl->ilimit = devm_regmap_field_alloc(&pdev->dev,
847 da9063->regmap, regl->info->ilimit);
848
849 /* Register regulator */
850 memset(&config, 0, sizeof(config));
851 config.dev = &pdev->dev;
852 config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
853 config.driver_data = regl;
854 if (da9063_reg_matches)
855 config.of_node = da9063_reg_matches[id].of_node;
856 config.regmap = da9063->regmap;
857 regl->rdev = regulator_register(&regl->desc, &config);
858 if (IS_ERR_OR_NULL(regl->rdev)) {
859 dev_err(&pdev->dev,
860 "Failed to register %s regulator\n",
861 regl->desc.name);
862 ret = PTR_ERR(regl->rdev);
863 goto err;
864 }
865 id++;
866 n++;
867 }
868
869 /* LDOs overcurrent event support */
870 irq = platform_get_irq_byname(pdev, "LDO_LIM");
871 if (irq < 0) {
872 ret = irq;
873 dev_err(&pdev->dev, "Failed to get IRQ.\n");
874 goto err;
875 }
876
877 regulators->irq_ldo_lim = regmap_irq_get_virq(da9063->regmap_irq, irq);
878 if (regulators->irq_ldo_lim >= 0) {
879 ret = request_threaded_irq(regulators->irq_ldo_lim,
880 NULL, da9063_ldo_lim_event,
881 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
882 "LDO_LIM", regulators);
883 if (ret) {
884 dev_err(&pdev->dev,
885 "Failed to request LDO_LIM IRQ.\n");
886 regulators->irq_ldo_lim = -ENXIO;
887 }
888 }
889
890 return 0;
891
892err:
893 /* Wind back regulators registeration */
894 while (--n >= 0)
895 regulator_unregister(regulators->regulator[n].rdev);
896
897 return ret;
898}
899
900static int da9063_regulator_remove(struct platform_device *pdev)
901{
902 struct da9063_regulators *regulators = platform_get_drvdata(pdev);
903 struct da9063_regulator *regl;
904
905 free_irq(regulators->irq_ldo_lim, regulators);
906 free_irq(regulators->irq_uvov, regulators);
907
908 for (regl = &regulators->regulator[regulators->n_regulators - 1];
909 regl >= &regulators->regulator[0]; regl--)
910 regulator_unregister(regl->rdev);
911
912 return 0;
913}
914
915static struct platform_driver da9063_regulator_driver = {
916 .driver = {
917 .name = DA9063_DRVNAME_REGULATORS,
918 .owner = THIS_MODULE,
919 },
920 .probe = da9063_regulator_probe,
921 .remove = da9063_regulator_remove,
922};
923
924static int __init da9063_regulator_init(void)
925{
926 return platform_driver_register(&da9063_regulator_driver);
927}
928subsys_initcall(da9063_regulator_init);
929
930static void __exit da9063_regulator_cleanup(void)
931{
932 platform_driver_unregister(&da9063_regulator_driver);
933}
934module_exit(da9063_regulator_cleanup);
935
936
937/* Module information */
938MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
939MODULE_DESCRIPTION("DA9063 regulators driver");
940MODULE_LICENSE("GPL");
941MODULE_ALIAS("paltform:" DA9063_DRVNAME_REGULATORS);
Linux kernel - Deliverables
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