Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/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         unsigned                                dev_model;
102 };
103 
104 /* Single regulator settings */
105 struct da9063_regulator {
106         struct regulator_desc                   desc;
107         struct regulator_dev                    *rdev;
108         struct da9063                           *hw;
109         const struct da9063_regulator_info      *info;
110 
111         struct regmap_field                     *mode;
112         struct regmap_field                     *suspend;
113         struct regmap_field                     *sleep;
114         struct regmap_field                     *suspend_sleep;
115         struct regmap_field                     *ilimit;
116 };
117 
118 /* Encapsulates all information for the regulators driver */
119 struct da9063_regulators {
120         int                                     irq_ldo_lim;
121         int                                     irq_uvov;
122 
123         unsigned                                n_regulators;
124         /* Array size to be defined during init. Keep at end. */
125         struct da9063_regulator                 regulator[0];
126 };
127 
128 /* BUCK modes for DA9063 */
129 enum {
130         BUCK_MODE_MANUAL,       /* 0 */
131         BUCK_MODE_SLEEP,        /* 1 */
132         BUCK_MODE_SYNC,         /* 2 */
133         BUCK_MODE_AUTO          /* 3 */
134 };
135 
136 /* Regulator operations */
137 
138 /* Current limits array (in uA) for BCORE1, BCORE2, BPRO.
139    Entry indexes corresponds to register values. */
140 static const int da9063_buck_a_limits[] = {
141          500000,  600000,  700000,  800000,  900000, 1000000, 1100000, 1200000,
142         1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
143 };
144 
145 /* Current limits array (in uA) for BMEM, BIO, BPERI.
146    Entry indexes corresponds to register values. */
147 static const int da9063_buck_b_limits[] = {
148         1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
149         2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
150 };
151 
152 /* Current limits array (in uA) for merged BCORE1 and BCORE2.
153    Entry indexes corresponds to register values. */
154 static const int da9063_bcores_merged_limits[] = {
155         1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000,
156         2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000
157 };
158 
159 /* Current limits array (in uA) for merged BMEM and BIO.
160    Entry indexes corresponds to register values. */
161 static const int da9063_bmem_bio_merged_limits[] = {
162         3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
163         4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
164 };
165 
166 static int da9063_set_current_limit(struct regulator_dev *rdev,
167                                                         int min_uA, int max_uA)
168 {
169         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
170         const struct da9063_regulator_info *rinfo = regl->info;
171         int n, tval;
172 
173         for (n = 0; n < rinfo->n_current_limits; n++) {
174                 tval = rinfo->current_limits[n];
175                 if (tval >= min_uA && tval <= max_uA)
176                         return regmap_field_write(regl->ilimit, n);
177         }
178 
179         return -EINVAL;
180 }
181 
182 static int da9063_get_current_limit(struct regulator_dev *rdev)
183 {
184         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
185         const struct da9063_regulator_info *rinfo = regl->info;
186         unsigned int sel;
187         int ret;
188 
189         ret = regmap_field_read(regl->ilimit, &sel);
190         if (ret < 0)
191                 return ret;
192 
193         if (sel >= rinfo->n_current_limits)
194                 sel = rinfo->n_current_limits - 1;
195 
196         return rinfo->current_limits[sel];
197 }
198 
199 static int da9063_buck_set_mode(struct regulator_dev *rdev, unsigned mode)
200 {
201         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
202         unsigned val;
203 
204         switch (mode) {
205         case REGULATOR_MODE_FAST:
206                 val = BUCK_MODE_SYNC;
207                 break;
208         case REGULATOR_MODE_NORMAL:
209                 val = BUCK_MODE_AUTO;
210                 break;
211         case REGULATOR_MODE_STANDBY:
212                 val = BUCK_MODE_SLEEP;
213                 break;
214         default:
215                 return -EINVAL;
216         }
217 
218         return regmap_field_write(regl->mode, val);
219 }
220 
221 /*
222  * Bucks use single mode register field for normal operation
223  * and suspend state.
224  * There are 3 modes to map to: FAST, NORMAL, and STANDBY.
225  */
226 
227 static unsigned da9063_buck_get_mode(struct regulator_dev *rdev)
228 {
229         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
230         struct regmap_field *field;
231         unsigned int val, mode = 0;
232         int ret;
233 
234         ret = regmap_field_read(regl->mode, &val);
235         if (ret < 0)
236                 return ret;
237 
238         switch (val) {
239         default:
240         case BUCK_MODE_MANUAL:
241                 mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY;
242                 /* Sleep flag bit decides the mode */
243                 break;
244         case BUCK_MODE_SLEEP:
245                 return REGULATOR_MODE_STANDBY;
246         case BUCK_MODE_SYNC:
247                 return REGULATOR_MODE_FAST;
248         case BUCK_MODE_AUTO:
249                 return REGULATOR_MODE_NORMAL;
250         }
251 
252         /* Detect current regulator state */
253         ret = regmap_field_read(regl->suspend, &val);
254         if (ret < 0)
255                 return 0;
256 
257         /* Read regulator mode from proper register, depending on state */
258         if (val)
259                 field = regl->suspend_sleep;
260         else
261                 field = regl->sleep;
262 
263         ret = regmap_field_read(field, &val);
264         if (ret < 0)
265                 return 0;
266 
267         if (val)
268                 mode &= REGULATOR_MODE_STANDBY;
269         else
270                 mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST;
271 
272         return mode;
273 }
274 
275 /*
276  * LDOs use sleep flags - one for normal and one for suspend state.
277  * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state.
278  */
279 
280 static int da9063_ldo_set_mode(struct regulator_dev *rdev, unsigned mode)
281 {
282         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
283         unsigned val;
284 
285         switch (mode) {
286         case REGULATOR_MODE_NORMAL:
287                 val = 0;
288                 break;
289         case REGULATOR_MODE_STANDBY:
290                 val = 1;
291                 break;
292         default:
293                 return -EINVAL;
294         }
295 
296         return regmap_field_write(regl->sleep, val);
297 }
298 
299 static unsigned da9063_ldo_get_mode(struct regulator_dev *rdev)
300 {
301         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
302         struct regmap_field *field;
303         int ret, val;
304 
305         /* Detect current regulator state */
306         ret = regmap_field_read(regl->suspend, &val);
307         if (ret < 0)
308                 return 0;
309 
310         /* Read regulator mode from proper register, depending on state */
311         if (val)
312                 field = regl->suspend_sleep;
313         else
314                 field = regl->sleep;
315 
316         ret = regmap_field_read(field, &val);
317         if (ret < 0)
318                 return 0;
319 
320         if (val)
321                 return REGULATOR_MODE_STANDBY;
322         else
323                 return REGULATOR_MODE_NORMAL;
324 }
325 
326 static int da9063_buck_get_status(struct regulator_dev *rdev)
327 {
328         int ret = regulator_is_enabled_regmap(rdev);
329 
330         if (ret == 0) {
331                 ret = REGULATOR_STATUS_OFF;
332         } else if (ret > 0) {
333                 ret = da9063_buck_get_mode(rdev);
334                 if (ret > 0)
335                         ret = regulator_mode_to_status(ret);
336                 else if (ret == 0)
337                         ret = -EIO;
338         }
339 
340         return ret;
341 }
342 
343 static int da9063_ldo_get_status(struct regulator_dev *rdev)
344 {
345         int ret = regulator_is_enabled_regmap(rdev);
346 
347         if (ret == 0) {
348                 ret = REGULATOR_STATUS_OFF;
349         } else if (ret > 0) {
350                 ret = da9063_ldo_get_mode(rdev);
351                 if (ret > 0)
352                         ret = regulator_mode_to_status(ret);
353                 else if (ret == 0)
354                         ret = -EIO;
355         }
356 
357         return ret;
358 }
359 
360 static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV)
361 {
362         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
363         const struct da9063_regulator_info *rinfo = regl->info;
364         int ret, sel;
365 
366         sel = regulator_map_voltage_linear(rdev, uV, uV);
367         if (sel < 0)
368                 return sel;
369 
370         sel <<= ffs(rdev->desc->vsel_mask) - 1;
371 
372         ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg,
373                                  rdev->desc->vsel_mask, sel);
374 
375         return ret;
376 }
377 
378 static int da9063_suspend_enable(struct regulator_dev *rdev)
379 {
380         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
381 
382         return regmap_field_write(regl->suspend, 1);
383 }
384 
385 static int da9063_suspend_disable(struct regulator_dev *rdev)
386 {
387         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
388 
389         return regmap_field_write(regl->suspend, 0);
390 }
391 
392 static int da9063_buck_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
393 {
394         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
395         int val;
396 
397         switch (mode) {
398         case REGULATOR_MODE_FAST:
399                 val = BUCK_MODE_SYNC;
400                 break;
401         case REGULATOR_MODE_NORMAL:
402                 val = BUCK_MODE_AUTO;
403                 break;
404         case REGULATOR_MODE_STANDBY:
405                 val = BUCK_MODE_SLEEP;
406                 break;
407         default:
408                 return -EINVAL;
409         }
410 
411         return regmap_field_write(regl->mode, val);
412 }
413 
414 static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
415 {
416         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
417         unsigned val;
418 
419         switch (mode) {
420         case REGULATOR_MODE_NORMAL:
421                 val = 0;
422                 break;
423         case REGULATOR_MODE_STANDBY:
424                 val = 1;
425                 break;
426         default:
427                 return -EINVAL;
428         }
429 
430         return regmap_field_write(regl->suspend_sleep, val);
431 }
432 
433 static struct regulator_ops da9063_buck_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_current_limit      = da9063_set_current_limit,
441         .get_current_limit      = da9063_get_current_limit,
442         .set_mode               = da9063_buck_set_mode,
443         .get_mode               = da9063_buck_get_mode,
444         .get_status             = da9063_buck_get_status,
445         .set_suspend_voltage    = da9063_set_suspend_voltage,
446         .set_suspend_enable     = da9063_suspend_enable,
447         .set_suspend_disable    = da9063_suspend_disable,
448         .set_suspend_mode       = da9063_buck_set_suspend_mode,
449 };
450 
451 static struct regulator_ops da9063_ldo_ops = {
452         .enable                 = regulator_enable_regmap,
453         .disable                = regulator_disable_regmap,
454         .is_enabled             = regulator_is_enabled_regmap,
455         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
456         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
457         .list_voltage           = regulator_list_voltage_linear,
458         .set_mode               = da9063_ldo_set_mode,
459         .get_mode               = da9063_ldo_get_mode,
460         .get_status             = da9063_ldo_get_status,
461         .set_suspend_voltage    = da9063_set_suspend_voltage,
462         .set_suspend_enable     = da9063_suspend_enable,
463         .set_suspend_disable    = da9063_suspend_disable,
464         .set_suspend_mode       = da9063_ldo_set_suspend_mode,
465 };
466 
467 /* Info of regulators for DA9063 */
468 static const struct da9063_regulator_info da9063_regulator_info[] = {
469         {
470                 DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570,
471                             da9063_buck_a_limits),
472                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
473                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
474                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
475                                  DA9063_BCORE1_ILIM_MASK),
476         },
477         {
478                 DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
479                             da9063_buck_a_limits),
480                 DA9063_BUCK_COMMON_FIELDS(BCORE2),
481                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE2_SEL),
482                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
483                                  DA9063_BCORE2_ILIM_MASK),
484         },
485         {
486                 DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
487                             da9063_buck_a_limits),
488                 DA9063_BUCK_COMMON_FIELDS(BPRO),
489                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPRO_SEL),
490                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
491                                  DA9063_BPRO_ILIM_MASK),
492         },
493         {
494                 DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
495                             da9063_buck_b_limits),
496                 DA9063_BUCK_COMMON_FIELDS(BMEM),
497                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
498                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
499                                  DA9063_BMEM_ILIM_MASK),
500         },
501         {
502                 DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
503                             da9063_buck_b_limits),
504                 DA9063_BUCK_COMMON_FIELDS(BIO),
505                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VBIO_SEL),
506                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
507                                  DA9063_BIO_ILIM_MASK),
508         },
509         {
510                 DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
511                             da9063_buck_b_limits),
512                 DA9063_BUCK_COMMON_FIELDS(BPERI),
513                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPERI_SEL),
514                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
515                                  DA9063_BPERI_ILIM_MASK),
516         },
517         {
518                 DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
519                             da9063_bcores_merged_limits),
520                 /* BCORES_MERGED uses the same register fields as BCORE1 */
521                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
522                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
523                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
524                                  DA9063_BCORE1_ILIM_MASK),
525         },
526         {
527                 DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
528                             da9063_bmem_bio_merged_limits),
529                 /* BMEM_BIO_MERGED uses the same register fields as BMEM */
530                 DA9063_BUCK_COMMON_FIELDS(BMEM),
531                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
532                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
533                                  DA9063_BMEM_ILIM_MASK),
534         },
535         {
536                 DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
537                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL),
538         },
539         {
540                 DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
541                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL),
542         },
543         {
544                 DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
545                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL),
546                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
547         },
548         {
549                 DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
550                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL),
551                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
552         },
553         {
554                 DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
555                 .suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL),
556         },
557         {
558                 DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
559                 .suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL),
560         },
561         {
562                 DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
563                 .suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL),
564                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
565         },
566         {
567                 DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
568                 .suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL),
569                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
570         },
571         {
572                 DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
573                 .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
574         },
575         {
576                 DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
577                 .suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL),
578         },
579         {
580                 DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
581                 .suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL),
582                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
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                 .dev_model = PMIC_DA9063,
592         },
593         { }
594 };
595 
596 /* Regulator interrupt handlers */
597 static irqreturn_t da9063_ldo_lim_event(int irq, void *data)
598 {
599         struct da9063_regulators *regulators = data;
600         struct da9063 *hw = regulators->regulator[0].hw;
601         struct da9063_regulator *regl;
602         int bits, i , ret;
603 
604         ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
605         if (ret < 0)
606                 return IRQ_NONE;
607 
608         for (i = regulators->n_regulators - 1; i >= 0; i--) {
609                 regl = &regulators->regulator[i];
610                 if (regl->info->oc_event.reg != DA9063_REG_STATUS_D)
611                         continue;
612 
613                 if (BIT(regl->info->oc_event.lsb) & bits)
614                         regulator_notifier_call_chain(regl->rdev,
615                                         REGULATOR_EVENT_OVER_CURRENT, NULL);
616         }
617 
618         return IRQ_HANDLED;
619 }
620 
621 /*
622  * Probing and Initialisation functions
623  */
624 static const struct regulator_init_data *da9063_get_regulator_initdata(
625                 const struct da9063_regulators_pdata *regl_pdata, int id)
626 {
627         int i;
628 
629         for (i = 0; i < regl_pdata->n_regulators; i++) {
630                 if (id == regl_pdata->regulator_data[i].id)
631                         return regl_pdata->regulator_data[i].initdata;
632         }
633 
634         return NULL;
635 }
636 
637 #ifdef CONFIG_OF
638 static struct of_regulator_match da9063_matches[] = {
639         [DA9063_ID_BCORE1]           = { .name = "bcore1"           },
640         [DA9063_ID_BCORE2]           = { .name = "bcore2"           },
641         [DA9063_ID_BPRO]             = { .name = "bpro",            },
642         [DA9063_ID_BMEM]             = { .name = "bmem",            },
643         [DA9063_ID_BIO]              = { .name = "bio",             },
644         [DA9063_ID_BPERI]            = { .name = "bperi",           },
645         [DA9063_ID_BCORES_MERGED]    = { .name = "bcores-merged"    },
646         [DA9063_ID_BMEM_BIO_MERGED]  = { .name = "bmem-bio-merged", },
647         [DA9063_ID_LDO1]             = { .name = "ldo1",            },
648         [DA9063_ID_LDO2]             = { .name = "ldo2",            },
649         [DA9063_ID_LDO3]             = { .name = "ldo3",            },
650         [DA9063_ID_LDO4]             = { .name = "ldo4",            },
651         [DA9063_ID_LDO5]             = { .name = "ldo5",            },
652         [DA9063_ID_LDO6]             = { .name = "ldo6",            },
653         [DA9063_ID_LDO7]             = { .name = "ldo7",            },
654         [DA9063_ID_LDO8]             = { .name = "ldo8",            },
655         [DA9063_ID_LDO9]             = { .name = "ldo9",            },
656         [DA9063_ID_LDO10]            = { .name = "ldo10",           },
657         [DA9063_ID_LDO11]            = { .name = "ldo11",           },
658 };
659 
660 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
661                 struct platform_device *pdev,
662                 struct of_regulator_match **da9063_reg_matches)
663 {
664         struct da9063_regulators_pdata *pdata;
665         struct da9063_regulator_data *rdata;
666         struct device_node *node;
667         int i, n, num;
668 
669         node = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
670         if (!node) {
671                 dev_err(&pdev->dev, "Regulators device node not found\n");
672                 return ERR_PTR(-ENODEV);
673         }
674 
675         num = of_regulator_match(&pdev->dev, node, da9063_matches,
676                                  ARRAY_SIZE(da9063_matches));
677         of_node_put(node);
678         if (num < 0) {
679                 dev_err(&pdev->dev, "Failed to match regulators\n");
680                 return ERR_PTR(-EINVAL);
681         }
682 
683         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
684         if (!pdata)
685                 return ERR_PTR(-ENOMEM);
686 
687         pdata->regulator_data = devm_kzalloc(&pdev->dev,
688                                         num * sizeof(*pdata->regulator_data),
689                                         GFP_KERNEL);
690         if (!pdata->regulator_data)
691                 return ERR_PTR(-ENOMEM);
692         pdata->n_regulators = num;
693 
694         n = 0;
695         for (i = 0; i < ARRAY_SIZE(da9063_matches); i++) {
696                 if (!da9063_matches[i].init_data)
697                         continue;
698 
699                 rdata = &pdata->regulator_data[n];
700                 rdata->id = i;
701                 rdata->initdata = da9063_matches[i].init_data;
702 
703                 n++;
704         };
705 
706         *da9063_reg_matches = da9063_matches;
707         return pdata;
708 }
709 #else
710 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
711                 struct platform_device *pdev,
712                 struct of_regulator_match **da9063_reg_matches)
713 {
714         *da9063_reg_matches = NULL;
715         return ERR_PTR(-ENODEV);
716 }
717 #endif
718 
719 static int da9063_regulator_probe(struct platform_device *pdev)
720 {
721         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
722         struct da9063_pdata *da9063_pdata = dev_get_platdata(da9063->dev);
723         struct of_regulator_match *da9063_reg_matches = NULL;
724         struct da9063_regulators_pdata *regl_pdata;
725         const struct da9063_dev_model *model;
726         struct da9063_regulators *regulators;
727         struct da9063_regulator *regl;
728         struct regulator_config config;
729         bool bcores_merged, bmem_bio_merged;
730         int id, irq, n, n_regulators, ret, val;
731         size_t size;
732 
733         regl_pdata = da9063_pdata ? da9063_pdata->regulators_pdata : NULL;
734 
735         if (!regl_pdata)
736                 regl_pdata = da9063_parse_regulators_dt(pdev,
737                                                         &da9063_reg_matches);
738 
739         if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
740                 dev_err(&pdev->dev,
741                         "No regulators defined for the platform\n");
742                 return PTR_ERR(regl_pdata);
743         }
744 
745         /* Find regulators set for particular device model */
746         for (model = regulators_models; model->regulator_info; model++) {
747                 if (model->dev_model == da9063->model)
748                         break;
749         }
750         if (!model->regulator_info) {
751                 dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
752                         da9063->model);
753                 return -ENODEV;
754         }
755 
756         ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
757         if (ret < 0) {
758                 dev_err(&pdev->dev,
759                         "Error while reading BUCKs configuration\n");
760                 return ret;
761         }
762         bcores_merged = val & DA9063_BCORE_MERGE;
763         bmem_bio_merged = val & DA9063_BUCK_MERGE;
764 
765         n_regulators = model->n_regulators;
766         if (bcores_merged)
767                 n_regulators -= 2; /* remove BCORE1, BCORE2 */
768         else
769                 n_regulators--;    /* remove BCORES_MERGED */
770         if (bmem_bio_merged)
771                 n_regulators -= 2; /* remove BMEM, BIO */
772         else
773                 n_regulators--;    /* remove BMEM_BIO_MERGED */
774 
775         /* Allocate memory required by usable regulators */
776         size = sizeof(struct da9063_regulators) +
777                 n_regulators * sizeof(struct da9063_regulator);
778         regulators = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
779         if (!regulators)
780                 return -ENOMEM;
781 
782         regulators->n_regulators = n_regulators;
783         platform_set_drvdata(pdev, regulators);
784 
785         /* Register all regulators declared in platform information */
786         n = 0;
787         id = 0;
788         while (n < regulators->n_regulators) {
789                 /* Skip regulator IDs depending on merge mode configuration */
790                 switch (id) {
791                 case DA9063_ID_BCORE1:
792                 case DA9063_ID_BCORE2:
793                         if (bcores_merged) {
794                                 id++;
795                                 continue;
796                         }
797                         break;
798                 case DA9063_ID_BMEM:
799                 case DA9063_ID_BIO:
800                         if (bmem_bio_merged) {
801                                 id++;
802                                 continue;
803                         }
804                         break;
805                 case DA9063_ID_BCORES_MERGED:
806                         if (!bcores_merged) {
807                                 id++;
808                                 continue;
809                         }
810                         break;
811                 case DA9063_ID_BMEM_BIO_MERGED:
812                         if (!bmem_bio_merged) {
813                                 id++;
814                                 continue;
815                         }
816                         break;
817                 }
818 
819                 /* Initialise regulator structure */
820                 regl = &regulators->regulator[n];
821                 regl->hw = da9063;
822                 regl->info = &model->regulator_info[id];
823                 regl->desc = regl->info->desc;
824                 regl->desc.type = REGULATOR_VOLTAGE;
825                 regl->desc.owner = THIS_MODULE;
826 
827                 if (regl->info->mode.reg)
828                         regl->mode = devm_regmap_field_alloc(&pdev->dev,
829                                         da9063->regmap, regl->info->mode);
830                 if (regl->info->suspend.reg)
831                         regl->suspend = devm_regmap_field_alloc(&pdev->dev,
832                                         da9063->regmap, regl->info->suspend);
833                 if (regl->info->sleep.reg)
834                         regl->sleep = devm_regmap_field_alloc(&pdev->dev,
835                                         da9063->regmap, regl->info->sleep);
836                 if (regl->info->suspend_sleep.reg)
837                         regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
838                                         da9063->regmap, regl->info->suspend_sleep);
839                 if (regl->info->ilimit.reg)
840                         regl->ilimit = devm_regmap_field_alloc(&pdev->dev,
841                                         da9063->regmap, regl->info->ilimit);
842 
843                 /* Register regulator */
844                 memset(&config, 0, sizeof(config));
845                 config.dev = &pdev->dev;
846                 config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
847                 config.driver_data = regl;
848                 if (da9063_reg_matches)
849                         config.of_node = da9063_reg_matches[id].of_node;
850                 config.regmap = da9063->regmap;
851                 regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
852                                                      &config);
853                 if (IS_ERR(regl->rdev)) {
854                         dev_err(&pdev->dev,
855                                 "Failed to register %s regulator\n",
856                                 regl->desc.name);
857                         return PTR_ERR(regl->rdev);
858                 }
859                 id++;
860                 n++;
861         }
862 
863         /* LDOs overcurrent event support */
864         irq = platform_get_irq_byname(pdev, "LDO_LIM");
865         if (irq < 0) {
866                 dev_err(&pdev->dev, "Failed to get IRQ.\n");
867                 return irq;
868         }
869 
870         regulators->irq_ldo_lim = regmap_irq_get_virq(da9063->regmap_irq, irq);
871         if (regulators->irq_ldo_lim >= 0) {
872                 ret = request_threaded_irq(regulators->irq_ldo_lim,
873                                            NULL, da9063_ldo_lim_event,
874                                            IRQF_TRIGGER_LOW | IRQF_ONESHOT,
875                                            "LDO_LIM", regulators);
876                 if (ret) {
877                         dev_err(&pdev->dev,
878                                         "Failed to request LDO_LIM IRQ.\n");
879                         regulators->irq_ldo_lim = -ENXIO;
880                 }
881         }
882 
883         return 0;
884 }
885 
886 static int da9063_regulator_remove(struct platform_device *pdev)
887 {
888         struct da9063_regulators *regulators = platform_get_drvdata(pdev);
889 
890         free_irq(regulators->irq_ldo_lim, regulators);
891         free_irq(regulators->irq_uvov, regulators);
892 
893         return 0;
894 }
895 
896 static struct platform_driver da9063_regulator_driver = {
897         .driver = {
898                 .name = DA9063_DRVNAME_REGULATORS,
899                 .owner = THIS_MODULE,
900         },
901         .probe = da9063_regulator_probe,
902         .remove = da9063_regulator_remove,
903 };
904 
905 static int __init da9063_regulator_init(void)
906 {
907         return platform_driver_register(&da9063_regulator_driver);
908 }
909 subsys_initcall(da9063_regulator_init);
910 
911 static void __exit da9063_regulator_cleanup(void)
912 {
913         platform_driver_unregister(&da9063_regulator_driver);
914 }
915 module_exit(da9063_regulator_cleanup);
916 
917 
918 /* Module information */
919 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
920 MODULE_DESCRIPTION("DA9063 regulators driver");
921 MODULE_LICENSE("GPL");
922 MODULE_ALIAS("paltform:" DA9063_DRVNAME_REGULATORS);
923 

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