Merge tag 'for-linus-5.10b-rc1b-tag' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6-microblaze.git] / drivers / regulator / da9063-regulator.c
1 // SPDX-License-Identifier: GPL-2.0+
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 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/err.h>
14 #include <linux/slab.h>
15 #include <linux/of.h>
16 #include <linux/platform_device.h>
17 #include <linux/regmap.h>
18 #include <linux/regulator/driver.h>
19 #include <linux/regulator/machine.h>
20 #include <linux/regulator/of_regulator.h>
21 #include <linux/mfd/da9063/core.h>
22 #include <linux/mfd/da9063/registers.h>
23
24
25 /* Definition for registering regmap bit fields using a mask */
26 #define BFIELD(_reg, _mask) \
27         REG_FIELD(_reg, __builtin_ffs((int)_mask) - 1, \
28                 sizeof(unsigned int) * 8 - __builtin_clz((_mask)) - 1)
29
30 /* DA9063 and DA9063L regulator IDs */
31 enum {
32         /* BUCKs */
33         DA9063_ID_BCORE1,
34         DA9063_ID_BCORE2,
35         DA9063_ID_BPRO,
36         DA9063_ID_BMEM,
37         DA9063_ID_BIO,
38         DA9063_ID_BPERI,
39
40         /* BCORE1 and BCORE2 in merged mode */
41         DA9063_ID_BCORES_MERGED,
42         /* BMEM and BIO in merged mode */
43         DA9063_ID_BMEM_BIO_MERGED,
44         /* When two BUCKs are merged, they cannot be reused separately */
45
46         /* LDOs on both DA9063 and DA9063L */
47         DA9063_ID_LDO3,
48         DA9063_ID_LDO7,
49         DA9063_ID_LDO8,
50         DA9063_ID_LDO9,
51         DA9063_ID_LDO11,
52
53         /* DA9063-only LDOs */
54         DA9063_ID_LDO1,
55         DA9063_ID_LDO2,
56         DA9063_ID_LDO4,
57         DA9063_ID_LDO5,
58         DA9063_ID_LDO6,
59         DA9063_ID_LDO10,
60 };
61
62 /* Old regulator platform data */
63 struct da9063_regulator_data {
64         int                             id;
65         struct regulator_init_data      *initdata;
66 };
67
68 struct da9063_regulators_pdata {
69         unsigned int                    n_regulators;
70         struct da9063_regulator_data    *regulator_data;
71 };
72
73 /* Regulator capabilities and registers description */
74 struct da9063_regulator_info {
75         struct regulator_desc desc;
76
77         /* DA9063 main register fields */
78         struct reg_field mode;          /* buck mode of operation */
79         struct reg_field suspend;
80         struct reg_field sleep;
81         struct reg_field suspend_sleep;
82         unsigned int suspend_vsel_reg;
83
84         /* DA9063 event detection bit */
85         struct reg_field oc_event;
86 };
87
88 /* Macros for LDO */
89 #define DA9063_LDO(chip, regl_name, min_mV, step_mV, max_mV) \
90         .desc.id = chip##_ID_##regl_name, \
91         .desc.name = __stringify(chip##_##regl_name), \
92         .desc.ops = &da9063_ldo_ops, \
93         .desc.min_uV = (min_mV) * 1000, \
94         .desc.uV_step = (step_mV) * 1000, \
95         .desc.n_voltages = (((max_mV) - (min_mV))/(step_mV) + 1 \
96                 + (DA9063_V##regl_name##_BIAS)), \
97         .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
98         .desc.enable_mask = DA9063_LDO_EN, \
99         .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
100         .desc.vsel_mask = DA9063_V##regl_name##_MASK, \
101         .desc.linear_min_sel = DA9063_V##regl_name##_BIAS, \
102         .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_LDO_SL), \
103         .suspend = BFIELD(DA9063_REG_##regl_name##_CONT, DA9063_LDO_CONF), \
104         .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_LDO_SL), \
105         .suspend_vsel_reg = DA9063_REG_V##regl_name##_B
106
107 /* Macros for voltage DC/DC converters (BUCKs) */
108 #define DA9063_BUCK(chip, regl_name, min_mV, step_mV, max_mV, limits_array, \
109                     creg, cmask) \
110         .desc.id = chip##_ID_##regl_name, \
111         .desc.name = __stringify(chip##_##regl_name), \
112         .desc.ops = &da9063_buck_ops, \
113         .desc.min_uV = (min_mV) * 1000, \
114         .desc.uV_step = (step_mV) * 1000, \
115         .desc.n_voltages = ((max_mV) - (min_mV))/(step_mV) + 1, \
116         .desc.csel_reg = (creg), \
117         .desc.csel_mask = (cmask), \
118         .desc.curr_table = limits_array, \
119         .desc.n_current_limits = ARRAY_SIZE(limits_array)
120
121 #define DA9063_BUCK_COMMON_FIELDS(regl_name) \
122         .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
123         .desc.enable_mask = DA9063_BUCK_EN, \
124         .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
125         .desc.vsel_mask = DA9063_VBUCK_MASK, \
126         .desc.linear_min_sel = DA9063_VBUCK_BIAS, \
127         .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_BUCK_SL), \
128         .suspend = BFIELD(DA9063_REG_##regl_name##_CONT, DA9063_BUCK_CONF), \
129         .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_BUCK_SL), \
130         .suspend_vsel_reg = DA9063_REG_V##regl_name##_B, \
131         .mode = BFIELD(DA9063_REG_##regl_name##_CFG, DA9063_BUCK_MODE_MASK)
132
133 /* Defines asignment of regulators info table to chip model */
134 struct da9063_dev_model {
135         const struct da9063_regulator_info      *regulator_info;
136         unsigned int                            n_regulators;
137         enum da9063_type                        type;
138 };
139
140 /* Single regulator settings */
141 struct da9063_regulator {
142         struct regulator_desc                   desc;
143         struct regulator_dev                    *rdev;
144         struct da9063                           *hw;
145         const struct da9063_regulator_info      *info;
146
147         struct regmap_field                     *mode;
148         struct regmap_field                     *suspend;
149         struct regmap_field                     *sleep;
150         struct regmap_field                     *suspend_sleep;
151 };
152
153 /* Encapsulates all information for the regulators driver */
154 struct da9063_regulators {
155         unsigned int                            n_regulators;
156         /* Array size to be defined during init. Keep at end. */
157         struct da9063_regulator                 regulator[];
158 };
159
160 /* BUCK modes for DA9063 */
161 enum {
162         BUCK_MODE_MANUAL,       /* 0 */
163         BUCK_MODE_SLEEP,        /* 1 */
164         BUCK_MODE_SYNC,         /* 2 */
165         BUCK_MODE_AUTO          /* 3 */
166 };
167
168 /* Regulator operations */
169
170 /*
171  * Current limits array (in uA) for BCORE1, BCORE2, BPRO.
172  * Entry indexes corresponds to register values.
173  */
174 static const unsigned int da9063_buck_a_limits[] = {
175          500000,  600000,  700000,  800000,  900000, 1000000, 1100000, 1200000,
176         1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
177 };
178
179 /*
180  * Current limits array (in uA) for BMEM, BIO, BPERI.
181  * Entry indexes corresponds to register values.
182  */
183 static const unsigned int da9063_buck_b_limits[] = {
184         1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
185         2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
186 };
187
188 /*
189  * Current limits array (in uA) for merged BCORE1 and BCORE2.
190  * Entry indexes corresponds to register values.
191  */
192 static const unsigned int da9063_bcores_merged_limits[] = {
193         1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000,
194         2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000
195 };
196
197 /*
198  * Current limits array (in uA) for merged BMEM and BIO.
199  * Entry indexes corresponds to register values.
200  */
201 static const unsigned int da9063_bmem_bio_merged_limits[] = {
202         3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
203         4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
204 };
205
206 static int da9063_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
207 {
208         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
209         unsigned int val;
210
211         switch (mode) {
212         case REGULATOR_MODE_FAST:
213                 val = BUCK_MODE_SYNC;
214                 break;
215         case REGULATOR_MODE_NORMAL:
216                 val = BUCK_MODE_AUTO;
217                 break;
218         case REGULATOR_MODE_STANDBY:
219                 val = BUCK_MODE_SLEEP;
220                 break;
221         default:
222                 return -EINVAL;
223         }
224
225         return regmap_field_write(regl->mode, val);
226 }
227
228 /*
229  * Bucks use single mode register field for normal operation
230  * and suspend state.
231  * There are 3 modes to map to: FAST, NORMAL, and STANDBY.
232  */
233
234 static unsigned int da9063_buck_get_mode(struct regulator_dev *rdev)
235 {
236         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
237         unsigned int val;
238         int ret;
239
240         ret = regmap_field_read(regl->mode, &val);
241         if (ret < 0)
242                 return ret;
243
244         switch (val) {
245         default:
246         case BUCK_MODE_MANUAL:
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         ret = regmap_field_read(regl->sleep, &val);
258         if (ret < 0)
259                 return 0;
260
261         if (val)
262                 return REGULATOR_MODE_STANDBY;
263         else
264                 return REGULATOR_MODE_FAST;
265 }
266
267 /*
268  * LDOs use sleep flags - one for normal and one for suspend state.
269  * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state.
270  */
271
272 static int da9063_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode)
273 {
274         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
275         unsigned int val;
276
277         switch (mode) {
278         case REGULATOR_MODE_NORMAL:
279                 val = 0;
280                 break;
281         case REGULATOR_MODE_STANDBY:
282                 val = 1;
283                 break;
284         default:
285                 return -EINVAL;
286         }
287
288         return regmap_field_write(regl->sleep, val);
289 }
290
291 static unsigned int da9063_ldo_get_mode(struct regulator_dev *rdev)
292 {
293         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
294         int ret, val;
295
296         ret = regmap_field_read(regl->sleep, &val);
297         if (ret < 0)
298                 return 0;
299
300         if (val)
301                 return REGULATOR_MODE_STANDBY;
302         else
303                 return REGULATOR_MODE_NORMAL;
304 }
305
306 static int da9063_buck_get_status(struct regulator_dev *rdev)
307 {
308         int ret = regulator_is_enabled_regmap(rdev);
309
310         if (ret == 0) {
311                 ret = REGULATOR_STATUS_OFF;
312         } else if (ret > 0) {
313                 ret = da9063_buck_get_mode(rdev);
314                 if (ret > 0)
315                         ret = regulator_mode_to_status(ret);
316                 else if (ret == 0)
317                         ret = -EIO;
318         }
319
320         return ret;
321 }
322
323 static int da9063_ldo_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_ldo_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_set_suspend_voltage(struct regulator_dev *rdev, int uV)
341 {
342         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
343         const struct da9063_regulator_info *rinfo = regl->info;
344         int ret, sel;
345
346         sel = regulator_map_voltage_linear(rdev, uV, uV);
347         if (sel < 0)
348                 return sel;
349
350         sel <<= ffs(rdev->desc->vsel_mask) - 1;
351
352         ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg,
353                                  rdev->desc->vsel_mask, sel);
354
355         return ret;
356 }
357
358 static int da9063_suspend_enable(struct regulator_dev *rdev)
359 {
360         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
361
362         return regmap_field_write(regl->suspend, 1);
363 }
364
365 static int da9063_suspend_disable(struct regulator_dev *rdev)
366 {
367         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
368
369         return regmap_field_write(regl->suspend, 0);
370 }
371
372 static int da9063_buck_set_suspend_mode(struct regulator_dev *rdev,
373                                 unsigned int mode)
374 {
375         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
376         int val;
377
378         switch (mode) {
379         case REGULATOR_MODE_FAST:
380                 val = BUCK_MODE_SYNC;
381                 break;
382         case REGULATOR_MODE_NORMAL:
383                 val = BUCK_MODE_AUTO;
384                 break;
385         case REGULATOR_MODE_STANDBY:
386                 val = BUCK_MODE_SLEEP;
387                 break;
388         default:
389                 return -EINVAL;
390         }
391
392         return regmap_field_write(regl->mode, val);
393 }
394
395 static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev,
396                                 unsigned int mode)
397 {
398         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
399         unsigned int val;
400
401         switch (mode) {
402         case REGULATOR_MODE_NORMAL:
403                 val = 0;
404                 break;
405         case REGULATOR_MODE_STANDBY:
406                 val = 1;
407                 break;
408         default:
409                 return -EINVAL;
410         }
411
412         return regmap_field_write(regl->suspend_sleep, val);
413 }
414
415 static const struct regulator_ops da9063_buck_ops = {
416         .enable                 = regulator_enable_regmap,
417         .disable                = regulator_disable_regmap,
418         .is_enabled             = regulator_is_enabled_regmap,
419         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
420         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
421         .list_voltage           = regulator_list_voltage_linear,
422         .set_current_limit      = regulator_set_current_limit_regmap,
423         .get_current_limit      = regulator_get_current_limit_regmap,
424         .set_mode               = da9063_buck_set_mode,
425         .get_mode               = da9063_buck_get_mode,
426         .get_status             = da9063_buck_get_status,
427         .set_suspend_voltage    = da9063_set_suspend_voltage,
428         .set_suspend_enable     = da9063_suspend_enable,
429         .set_suspend_disable    = da9063_suspend_disable,
430         .set_suspend_mode       = da9063_buck_set_suspend_mode,
431 };
432
433 static const struct regulator_ops da9063_ldo_ops = {
434         .enable                 = regulator_enable_regmap,
435         .disable                = regulator_disable_regmap,
436         .is_enabled             = regulator_is_enabled_regmap,
437         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
438         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
439         .list_voltage           = regulator_list_voltage_linear,
440         .set_mode               = da9063_ldo_set_mode,
441         .get_mode               = da9063_ldo_get_mode,
442         .get_status             = da9063_ldo_get_status,
443         .set_suspend_voltage    = da9063_set_suspend_voltage,
444         .set_suspend_enable     = da9063_suspend_enable,
445         .set_suspend_disable    = da9063_suspend_disable,
446         .set_suspend_mode       = da9063_ldo_set_suspend_mode,
447 };
448
449 /* Info of regulators for DA9063 */
450 static const struct da9063_regulator_info da9063_regulator_info[] = {
451         {
452                 DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570,
453                             da9063_buck_a_limits,
454                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE1_ILIM_MASK),
455                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
456         },
457         {
458                 DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
459                             da9063_buck_a_limits,
460                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE2_ILIM_MASK),
461                 DA9063_BUCK_COMMON_FIELDS(BCORE2),
462         },
463         {
464                 DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
465                             da9063_buck_a_limits,
466                             DA9063_REG_BUCK_ILIM_B, DA9063_BPRO_ILIM_MASK),
467                 DA9063_BUCK_COMMON_FIELDS(BPRO),
468         },
469         {
470                 DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
471                             da9063_buck_b_limits,
472                             DA9063_REG_BUCK_ILIM_A, DA9063_BMEM_ILIM_MASK),
473                 DA9063_BUCK_COMMON_FIELDS(BMEM),
474         },
475         {
476                 DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
477                             da9063_buck_b_limits,
478                             DA9063_REG_BUCK_ILIM_A, DA9063_BIO_ILIM_MASK),
479                 DA9063_BUCK_COMMON_FIELDS(BIO),
480         },
481         {
482                 DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
483                             da9063_buck_b_limits,
484                             DA9063_REG_BUCK_ILIM_B, DA9063_BPERI_ILIM_MASK),
485                 DA9063_BUCK_COMMON_FIELDS(BPERI),
486         },
487         {
488                 DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
489                             da9063_bcores_merged_limits,
490                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE1_ILIM_MASK),
491                 /* BCORES_MERGED uses the same register fields as BCORE1 */
492                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
493         },
494         {
495                 DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
496                             da9063_bmem_bio_merged_limits,
497                             DA9063_REG_BUCK_ILIM_A, DA9063_BMEM_ILIM_MASK),
498                 /* BMEM_BIO_MERGED uses the same register fields as BMEM */
499                 DA9063_BUCK_COMMON_FIELDS(BMEM),
500         },
501         {
502                 DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
503                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
504         },
505         {
506                 DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
507                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
508         },
509         {
510                 DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
511                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
512         },
513         {
514                 DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
515         },
516         {
517                 DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
518                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
519         },
520
521         /* The following LDOs are present only on DA9063, not on DA9063L */
522         {
523                 DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
524         },
525         {
526                 DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
527         },
528         {
529                 DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
530                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
531         },
532         {
533                 DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
534         },
535         {
536                 DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
537         },
538
539         {
540                 DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
541         },
542 };
543
544 /* Link chip model with regulators info table */
545 static struct da9063_dev_model regulators_models[] = {
546         {
547                 .regulator_info = da9063_regulator_info,
548                 .n_regulators = ARRAY_SIZE(da9063_regulator_info),
549                 .type = PMIC_TYPE_DA9063,
550         },
551         {
552                 .regulator_info = da9063_regulator_info,
553                 .n_regulators = ARRAY_SIZE(da9063_regulator_info) - 6,
554                 .type = PMIC_TYPE_DA9063L,
555         },
556         { }
557 };
558
559 /* Regulator interrupt handlers */
560 static irqreturn_t da9063_ldo_lim_event(int irq, void *data)
561 {
562         struct da9063_regulators *regulators = data;
563         struct da9063 *hw = regulators->regulator[0].hw;
564         struct da9063_regulator *regl;
565         int bits, i, ret;
566
567         ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
568         if (ret < 0)
569                 return IRQ_NONE;
570
571         for (i = regulators->n_regulators - 1; i >= 0; i--) {
572                 regl = &regulators->regulator[i];
573                 if (regl->info->oc_event.reg != DA9063_REG_STATUS_D)
574                         continue;
575
576                 if (BIT(regl->info->oc_event.lsb) & bits) {
577                         regulator_notifier_call_chain(regl->rdev,
578                                         REGULATOR_EVENT_OVER_CURRENT, NULL);
579                 }
580         }
581
582         return IRQ_HANDLED;
583 }
584
585 /*
586  * Probing and Initialisation functions
587  */
588 static const struct regulator_init_data *da9063_get_regulator_initdata(
589                 const struct da9063_regulators_pdata *regl_pdata, int id)
590 {
591         int i;
592
593         for (i = 0; i < regl_pdata->n_regulators; i++) {
594                 if (id == regl_pdata->regulator_data[i].id)
595                         return regl_pdata->regulator_data[i].initdata;
596         }
597
598         return NULL;
599 }
600
601 static struct of_regulator_match da9063_matches[] = {
602         [DA9063_ID_BCORE1]           = { .name = "bcore1"           },
603         [DA9063_ID_BCORE2]           = { .name = "bcore2"           },
604         [DA9063_ID_BPRO]             = { .name = "bpro",            },
605         [DA9063_ID_BMEM]             = { .name = "bmem",            },
606         [DA9063_ID_BIO]              = { .name = "bio",             },
607         [DA9063_ID_BPERI]            = { .name = "bperi",           },
608         [DA9063_ID_BCORES_MERGED]    = { .name = "bcores-merged"    },
609         [DA9063_ID_BMEM_BIO_MERGED]  = { .name = "bmem-bio-merged", },
610         [DA9063_ID_LDO3]             = { .name = "ldo3",            },
611         [DA9063_ID_LDO7]             = { .name = "ldo7",            },
612         [DA9063_ID_LDO8]             = { .name = "ldo8",            },
613         [DA9063_ID_LDO9]             = { .name = "ldo9",            },
614         [DA9063_ID_LDO11]            = { .name = "ldo11",           },
615         /* The following LDOs are present only on DA9063, not on DA9063L */
616         [DA9063_ID_LDO1]             = { .name = "ldo1",            },
617         [DA9063_ID_LDO2]             = { .name = "ldo2",            },
618         [DA9063_ID_LDO4]             = { .name = "ldo4",            },
619         [DA9063_ID_LDO5]             = { .name = "ldo5",            },
620         [DA9063_ID_LDO6]             = { .name = "ldo6",            },
621         [DA9063_ID_LDO10]            = { .name = "ldo10",           },
622 };
623
624 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
625                 struct platform_device *pdev,
626                 struct of_regulator_match **da9063_reg_matches)
627 {
628         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
629         struct da9063_regulators_pdata *pdata;
630         struct da9063_regulator_data *rdata;
631         struct device_node *node;
632         int da9063_matches_len = ARRAY_SIZE(da9063_matches);
633         int i, n, num;
634
635         if (da9063->type == PMIC_TYPE_DA9063L)
636                 da9063_matches_len -= 6;
637
638         node = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
639         if (!node) {
640                 dev_err(&pdev->dev, "Regulators device node not found\n");
641                 return ERR_PTR(-ENODEV);
642         }
643
644         num = of_regulator_match(&pdev->dev, node, da9063_matches,
645                                  da9063_matches_len);
646         of_node_put(node);
647         if (num < 0) {
648                 dev_err(&pdev->dev, "Failed to match regulators\n");
649                 return ERR_PTR(-EINVAL);
650         }
651
652         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
653         if (!pdata)
654                 return ERR_PTR(-ENOMEM);
655
656         pdata->regulator_data = devm_kcalloc(&pdev->dev,
657                                         num, sizeof(*pdata->regulator_data),
658                                         GFP_KERNEL);
659         if (!pdata->regulator_data)
660                 return ERR_PTR(-ENOMEM);
661         pdata->n_regulators = num;
662
663         n = 0;
664         for (i = 0; i < da9063_matches_len; i++) {
665                 if (!da9063_matches[i].init_data)
666                         continue;
667
668                 rdata = &pdata->regulator_data[n];
669                 rdata->id = i;
670                 rdata->initdata = da9063_matches[i].init_data;
671
672                 n++;
673         }
674
675         *da9063_reg_matches = da9063_matches;
676         return pdata;
677 }
678
679 static int da9063_regulator_probe(struct platform_device *pdev)
680 {
681         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
682         struct of_regulator_match *da9063_reg_matches = NULL;
683         struct da9063_regulators_pdata *regl_pdata;
684         const struct da9063_dev_model *model;
685         struct da9063_regulators *regulators;
686         struct da9063_regulator *regl;
687         struct regulator_config config;
688         bool bcores_merged, bmem_bio_merged;
689         int id, irq, n, n_regulators, ret, val;
690
691         regl_pdata = da9063_parse_regulators_dt(pdev, &da9063_reg_matches);
692
693         if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
694                 dev_err(&pdev->dev,
695                         "No regulators defined for the platform\n");
696                 return -ENODEV;
697         }
698
699         /* Find regulators set for particular device model */
700         for (model = regulators_models; model->regulator_info; model++) {
701                 if (model->type == da9063->type)
702                         break;
703         }
704         if (!model->regulator_info) {
705                 dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
706                         da9063->type);
707                 return -ENODEV;
708         }
709
710         ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
711         if (ret < 0) {
712                 dev_err(&pdev->dev,
713                         "Error while reading BUCKs configuration\n");
714                 return ret;
715         }
716         bcores_merged = val & DA9063_BCORE_MERGE;
717         bmem_bio_merged = val & DA9063_BUCK_MERGE;
718
719         n_regulators = model->n_regulators;
720         if (bcores_merged)
721                 n_regulators -= 2; /* remove BCORE1, BCORE2 */
722         else
723                 n_regulators--;    /* remove BCORES_MERGED */
724         if (bmem_bio_merged)
725                 n_regulators -= 2; /* remove BMEM, BIO */
726         else
727                 n_regulators--;    /* remove BMEM_BIO_MERGED */
728
729         /* Allocate memory required by usable regulators */
730         regulators = devm_kzalloc(&pdev->dev, struct_size(regulators,
731                                   regulator, n_regulators), GFP_KERNEL);
732         if (!regulators)
733                 return -ENOMEM;
734
735         regulators->n_regulators = n_regulators;
736         platform_set_drvdata(pdev, regulators);
737
738         /* Register all regulators declared in platform information */
739         n = 0;
740         id = 0;
741         while (n < regulators->n_regulators) {
742                 /* Skip regulator IDs depending on merge mode configuration */
743                 switch (id) {
744                 case DA9063_ID_BCORE1:
745                 case DA9063_ID_BCORE2:
746                         if (bcores_merged) {
747                                 id++;
748                                 continue;
749                         }
750                         break;
751                 case DA9063_ID_BMEM:
752                 case DA9063_ID_BIO:
753                         if (bmem_bio_merged) {
754                                 id++;
755                                 continue;
756                         }
757                         break;
758                 case DA9063_ID_BCORES_MERGED:
759                         if (!bcores_merged) {
760                                 id++;
761                                 continue;
762                         }
763                         break;
764                 case DA9063_ID_BMEM_BIO_MERGED:
765                         if (!bmem_bio_merged) {
766                                 id++;
767                                 continue;
768                         }
769                         break;
770                 }
771
772                 /* Initialise regulator structure */
773                 regl = &regulators->regulator[n];
774                 regl->hw = da9063;
775                 regl->info = &model->regulator_info[id];
776                 regl->desc = regl->info->desc;
777                 regl->desc.type = REGULATOR_VOLTAGE;
778                 regl->desc.owner = THIS_MODULE;
779
780                 if (regl->info->mode.reg) {
781                         regl->mode = devm_regmap_field_alloc(&pdev->dev,
782                                         da9063->regmap, regl->info->mode);
783                         if (IS_ERR(regl->mode))
784                                 return PTR_ERR(regl->mode);
785                 }
786
787                 if (regl->info->suspend.reg) {
788                         regl->suspend = devm_regmap_field_alloc(&pdev->dev,
789                                         da9063->regmap, regl->info->suspend);
790                         if (IS_ERR(regl->suspend))
791                                 return PTR_ERR(regl->suspend);
792                 }
793
794                 if (regl->info->sleep.reg) {
795                         regl->sleep = devm_regmap_field_alloc(&pdev->dev,
796                                         da9063->regmap, regl->info->sleep);
797                         if (IS_ERR(regl->sleep))
798                                 return PTR_ERR(regl->sleep);
799                 }
800
801                 if (regl->info->suspend_sleep.reg) {
802                         regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
803                                 da9063->regmap, regl->info->suspend_sleep);
804                         if (IS_ERR(regl->suspend_sleep))
805                                 return PTR_ERR(regl->suspend_sleep);
806                 }
807
808                 /* Register regulator */
809                 memset(&config, 0, sizeof(config));
810                 config.dev = &pdev->dev;
811                 config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
812                 config.driver_data = regl;
813                 if (da9063_reg_matches)
814                         config.of_node = da9063_reg_matches[id].of_node;
815                 config.regmap = da9063->regmap;
816                 regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
817                                                      &config);
818                 if (IS_ERR(regl->rdev)) {
819                         dev_err(&pdev->dev,
820                                 "Failed to register %s regulator\n",
821                                 regl->desc.name);
822                         return PTR_ERR(regl->rdev);
823                 }
824                 id++;
825                 n++;
826         }
827
828         /* LDOs overcurrent event support */
829         irq = platform_get_irq_byname(pdev, "LDO_LIM");
830         if (irq < 0)
831                 return irq;
832
833         ret = devm_request_threaded_irq(&pdev->dev, irq,
834                                 NULL, da9063_ldo_lim_event,
835                                 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
836                                 "LDO_LIM", regulators);
837         if (ret)
838                 dev_err(&pdev->dev, "Failed to request LDO_LIM IRQ.\n");
839
840         return ret;
841 }
842
843 static struct platform_driver da9063_regulator_driver = {
844         .driver = {
845                 .name = DA9063_DRVNAME_REGULATORS,
846         },
847         .probe = da9063_regulator_probe,
848 };
849
850 static int __init da9063_regulator_init(void)
851 {
852         return platform_driver_register(&da9063_regulator_driver);
853 }
854 subsys_initcall(da9063_regulator_init);
855
856 static void __exit da9063_regulator_cleanup(void)
857 {
858         platform_driver_unregister(&da9063_regulator_driver);
859 }
860 module_exit(da9063_regulator_cleanup);
861
862
863 /* Module information */
864 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
865 MODULE_DESCRIPTION("DA9063 regulators driver");
866 MODULE_LICENSE("GPL");
867 MODULE_ALIAS("platform:" DA9063_DRVNAME_REGULATORS);