Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
[linux-2.6-microblaze.git] / drivers / regulator / da9063-regulator.c
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         enum da9063_type                        type;
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, LDO3, 900, 20, 3440),
534                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL),
535                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
536         },
537         {
538                 DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
539                 .suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL),
540                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
541         },
542         {
543                 DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
544                 .suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL),
545                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
546         },
547         {
548                 DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
549                 .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
550         },
551         {
552                 DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
553                 .suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL),
554                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
555         },
556
557         /* The following LDOs are present only on DA9063, not on DA9063L */
558         {
559                 DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
560                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL),
561         },
562         {
563                 DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
564                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL),
565         },
566         {
567                 DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
568                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL),
569                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
570         },
571         {
572                 DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
573                 .suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL),
574         },
575         {
576                 DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
577                 .suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL),
578         },
579
580         {
581                 DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
582                 .suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL),
583         },
584 };
585
586 /* Link chip model with regulators info table */
587 static struct da9063_dev_model regulators_models[] = {
588         {
589                 .regulator_info = da9063_regulator_info,
590                 .n_regulators = ARRAY_SIZE(da9063_regulator_info),
591                 .type = PMIC_TYPE_DA9063,
592         },
593         {
594                 .regulator_info = da9063_regulator_info,
595                 .n_regulators = ARRAY_SIZE(da9063_regulator_info) - 6,
596                 .type = PMIC_TYPE_DA9063L,
597         },
598         { }
599 };
600
601 /* Regulator interrupt handlers */
602 static irqreturn_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  */
629 static 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
643 static 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_LDO3]             = { .name = "ldo3",            },
653         [DA9063_ID_LDO7]             = { .name = "ldo7",            },
654         [DA9063_ID_LDO8]             = { .name = "ldo8",            },
655         [DA9063_ID_LDO9]             = { .name = "ldo9",            },
656         [DA9063_ID_LDO11]            = { .name = "ldo11",           },
657         /* The following LDOs are present only on DA9063, not on DA9063L */
658         [DA9063_ID_LDO1]             = { .name = "ldo1",            },
659         [DA9063_ID_LDO2]             = { .name = "ldo2",            },
660         [DA9063_ID_LDO4]             = { .name = "ldo4",            },
661         [DA9063_ID_LDO5]             = { .name = "ldo5",            },
662         [DA9063_ID_LDO6]             = { .name = "ldo6",            },
663         [DA9063_ID_LDO10]            = { .name = "ldo10",           },
664 };
665
666 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
667                 struct platform_device *pdev,
668                 struct of_regulator_match **da9063_reg_matches)
669 {
670         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
671         struct da9063_regulators_pdata *pdata;
672         struct da9063_regulator_data *rdata;
673         struct device_node *node;
674         int da9063_matches_len = ARRAY_SIZE(da9063_matches);
675         int i, n, num;
676
677         if (da9063->type == PMIC_TYPE_DA9063L)
678                 da9063_matches_len -= 6;
679
680         node = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
681         if (!node) {
682                 dev_err(&pdev->dev, "Regulators device node not found\n");
683                 return ERR_PTR(-ENODEV);
684         }
685
686         num = of_regulator_match(&pdev->dev, node, da9063_matches,
687                                  da9063_matches_len);
688         of_node_put(node);
689         if (num < 0) {
690                 dev_err(&pdev->dev, "Failed to match regulators\n");
691                 return ERR_PTR(-EINVAL);
692         }
693
694         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
695         if (!pdata)
696                 return ERR_PTR(-ENOMEM);
697
698         pdata->regulator_data = devm_kcalloc(&pdev->dev,
699                                         num, sizeof(*pdata->regulator_data),
700                                         GFP_KERNEL);
701         if (!pdata->regulator_data)
702                 return ERR_PTR(-ENOMEM);
703         pdata->n_regulators = num;
704
705         n = 0;
706         for (i = 0; i < da9063_matches_len; i++) {
707                 if (!da9063_matches[i].init_data)
708                         continue;
709
710                 rdata = &pdata->regulator_data[n];
711                 rdata->id = i;
712                 rdata->initdata = da9063_matches[i].init_data;
713
714                 n++;
715         }
716
717         *da9063_reg_matches = da9063_matches;
718         return pdata;
719 }
720 #else
721 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
722                 struct platform_device *pdev,
723                 struct of_regulator_match **da9063_reg_matches)
724 {
725         *da9063_reg_matches = NULL;
726         return ERR_PTR(-ENODEV);
727 }
728 #endif
729
730 static int da9063_regulator_probe(struct platform_device *pdev)
731 {
732         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
733         struct da9063_pdata *da9063_pdata = dev_get_platdata(da9063->dev);
734         struct of_regulator_match *da9063_reg_matches = NULL;
735         struct da9063_regulators_pdata *regl_pdata;
736         const struct da9063_dev_model *model;
737         struct da9063_regulators *regulators;
738         struct da9063_regulator *regl;
739         struct regulator_config config;
740         bool bcores_merged, bmem_bio_merged;
741         int id, irq, n, n_regulators, ret, val;
742         size_t size;
743
744         regl_pdata = da9063_pdata ? da9063_pdata->regulators_pdata : NULL;
745
746         if (!regl_pdata)
747                 regl_pdata = da9063_parse_regulators_dt(pdev,
748                                                         &da9063_reg_matches);
749
750         if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
751                 dev_err(&pdev->dev,
752                         "No regulators defined for the platform\n");
753                 return -ENODEV;
754         }
755
756         /* Find regulators set for particular device model */
757         for (model = regulators_models; model->regulator_info; model++) {
758                 if (model->type == da9063->type)
759                         break;
760         }
761         if (!model->regulator_info) {
762                 dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
763                         da9063->type);
764                 return -ENODEV;
765         }
766
767         ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
768         if (ret < 0) {
769                 dev_err(&pdev->dev,
770                         "Error while reading BUCKs configuration\n");
771                 return ret;
772         }
773         bcores_merged = val & DA9063_BCORE_MERGE;
774         bmem_bio_merged = val & DA9063_BUCK_MERGE;
775
776         n_regulators = model->n_regulators;
777         if (bcores_merged)
778                 n_regulators -= 2; /* remove BCORE1, BCORE2 */
779         else
780                 n_regulators--;    /* remove BCORES_MERGED */
781         if (bmem_bio_merged)
782                 n_regulators -= 2; /* remove BMEM, BIO */
783         else
784                 n_regulators--;    /* remove BMEM_BIO_MERGED */
785
786         /* Allocate memory required by usable regulators */
787         size = sizeof(struct da9063_regulators) +
788                 n_regulators * sizeof(struct da9063_regulator);
789         regulators = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
790         if (!regulators)
791                 return -ENOMEM;
792
793         regulators->n_regulators = n_regulators;
794         platform_set_drvdata(pdev, regulators);
795
796         /* Register all regulators declared in platform information */
797         n = 0;
798         id = 0;
799         while (n < regulators->n_regulators) {
800                 /* Skip regulator IDs depending on merge mode configuration */
801                 switch (id) {
802                 case DA9063_ID_BCORE1:
803                 case DA9063_ID_BCORE2:
804                         if (bcores_merged) {
805                                 id++;
806                                 continue;
807                         }
808                         break;
809                 case DA9063_ID_BMEM:
810                 case DA9063_ID_BIO:
811                         if (bmem_bio_merged) {
812                                 id++;
813                                 continue;
814                         }
815                         break;
816                 case DA9063_ID_BCORES_MERGED:
817                         if (!bcores_merged) {
818                                 id++;
819                                 continue;
820                         }
821                         break;
822                 case DA9063_ID_BMEM_BIO_MERGED:
823                         if (!bmem_bio_merged) {
824                                 id++;
825                                 continue;
826                         }
827                         break;
828                 }
829
830                 /* Initialise regulator structure */
831                 regl = &regulators->regulator[n];
832                 regl->hw = da9063;
833                 regl->info = &model->regulator_info[id];
834                 regl->desc = regl->info->desc;
835                 regl->desc.type = REGULATOR_VOLTAGE;
836                 regl->desc.owner = THIS_MODULE;
837
838                 if (regl->info->mode.reg)
839                         regl->mode = devm_regmap_field_alloc(&pdev->dev,
840                                         da9063->regmap, regl->info->mode);
841                 if (regl->info->suspend.reg)
842                         regl->suspend = devm_regmap_field_alloc(&pdev->dev,
843                                         da9063->regmap, regl->info->suspend);
844                 if (regl->info->sleep.reg)
845                         regl->sleep = devm_regmap_field_alloc(&pdev->dev,
846                                         da9063->regmap, regl->info->sleep);
847                 if (regl->info->suspend_sleep.reg)
848                         regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
849                                         da9063->regmap, regl->info->suspend_sleep);
850                 if (regl->info->ilimit.reg)
851                         regl->ilimit = devm_regmap_field_alloc(&pdev->dev,
852                                         da9063->regmap, regl->info->ilimit);
853
854                 /* Register regulator */
855                 memset(&config, 0, sizeof(config));
856                 config.dev = &pdev->dev;
857                 config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
858                 config.driver_data = regl;
859                 if (da9063_reg_matches)
860                         config.of_node = da9063_reg_matches[id].of_node;
861                 config.regmap = da9063->regmap;
862                 regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
863                                                      &config);
864                 if (IS_ERR(regl->rdev)) {
865                         dev_err(&pdev->dev,
866                                 "Failed to register %s regulator\n",
867                                 regl->desc.name);
868                         return PTR_ERR(regl->rdev);
869                 }
870                 id++;
871                 n++;
872         }
873
874         /* LDOs overcurrent event support */
875         irq = platform_get_irq_byname(pdev, "LDO_LIM");
876         if (irq < 0) {
877                 dev_err(&pdev->dev, "Failed to get IRQ.\n");
878                 return irq;
879         }
880
881         ret = devm_request_threaded_irq(&pdev->dev, irq,
882                                 NULL, da9063_ldo_lim_event,
883                                 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
884                                 "LDO_LIM", regulators);
885         if (ret) {
886                 dev_err(&pdev->dev, "Failed to request LDO_LIM IRQ.\n");
887                 return ret;
888         }
889
890         return 0;
891 }
892
893 static struct platform_driver da9063_regulator_driver = {
894         .driver = {
895                 .name = DA9063_DRVNAME_REGULATORS,
896         },
897         .probe = da9063_regulator_probe,
898 };
899
900 static int __init da9063_regulator_init(void)
901 {
902         return platform_driver_register(&da9063_regulator_driver);
903 }
904 subsys_initcall(da9063_regulator_init);
905
906 static void __exit da9063_regulator_cleanup(void)
907 {
908         platform_driver_unregister(&da9063_regulator_driver);
909 }
910 module_exit(da9063_regulator_cleanup);
911
912
913 /* Module information */
914 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
915 MODULE_DESCRIPTION("DA9063 regulators driver");
916 MODULE_LICENSE("GPL");
917 MODULE_ALIAS("platform:" DA9063_DRVNAME_REGULATORS);