Version:  2.0.40 2.2.26 2.4.37 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2

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         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 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 struct regulator_ops da9063_ldo_ops = {
449         .enable                 = regulator_enable_regmap,
450         .disable                = regulator_disable_regmap,
451         .is_enabled             = regulator_is_enabled_regmap,
452         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
453         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
454         .list_voltage           = regulator_list_voltage_linear,
455         .set_mode               = da9063_ldo_set_mode,
456         .get_mode               = da9063_ldo_get_mode,
457         .get_status             = da9063_ldo_get_status,
458         .set_suspend_voltage    = da9063_set_suspend_voltage,
459         .set_suspend_enable     = da9063_suspend_enable,
460         .set_suspend_disable    = da9063_suspend_disable,
461         .set_suspend_mode       = da9063_ldo_set_suspend_mode,
462 };
463 
464 /* Info of regulators for DA9063 */
465 static const struct da9063_regulator_info da9063_regulator_info[] = {
466         {
467                 DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570,
468                             da9063_buck_a_limits),
469                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
470                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
471                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
472                                  DA9063_BCORE1_ILIM_MASK),
473         },
474         {
475                 DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
476                             da9063_buck_a_limits),
477                 DA9063_BUCK_COMMON_FIELDS(BCORE2),
478                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE2_SEL),
479                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
480                                  DA9063_BCORE2_ILIM_MASK),
481         },
482         {
483                 DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
484                             da9063_buck_a_limits),
485                 DA9063_BUCK_COMMON_FIELDS(BPRO),
486                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPRO_SEL),
487                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
488                                  DA9063_BPRO_ILIM_MASK),
489         },
490         {
491                 DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
492                             da9063_buck_b_limits),
493                 DA9063_BUCK_COMMON_FIELDS(BMEM),
494                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
495                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
496                                  DA9063_BMEM_ILIM_MASK),
497         },
498         {
499                 DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
500                             da9063_buck_b_limits),
501                 DA9063_BUCK_COMMON_FIELDS(BIO),
502                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VBIO_SEL),
503                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
504                                  DA9063_BIO_ILIM_MASK),
505         },
506         {
507                 DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
508                             da9063_buck_b_limits),
509                 DA9063_BUCK_COMMON_FIELDS(BPERI),
510                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPERI_SEL),
511                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
512                                  DA9063_BPERI_ILIM_MASK),
513         },
514         {
515                 DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
516                             da9063_bcores_merged_limits),
517                 /* BCORES_MERGED uses the same register fields as BCORE1 */
518                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
519                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
520                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
521                                  DA9063_BCORE1_ILIM_MASK),
522         },
523         {
524                 DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
525                             da9063_bmem_bio_merged_limits),
526                 /* BMEM_BIO_MERGED uses the same register fields as BMEM */
527                 DA9063_BUCK_COMMON_FIELDS(BMEM),
528                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
529                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
530                                  DA9063_BMEM_ILIM_MASK),
531         },
532         {
533                 DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
534                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL),
535         },
536         {
537                 DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
538                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL),
539         },
540         {
541                 DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
542                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL),
543                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
544         },
545         {
546                 DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
547                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL),
548                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
549         },
550         {
551                 DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
552                 .suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL),
553         },
554         {
555                 DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
556                 .suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL),
557         },
558         {
559                 DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
560                 .suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL),
561                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
562         },
563         {
564                 DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
565                 .suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL),
566                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
567         },
568         {
569                 DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
570                 .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
571         },
572         {
573                 DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
574                 .suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL),
575         },
576         {
577                 DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
578                 .suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL),
579                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
580         },
581 };
582 
583 /* Link chip model with regulators info table */
584 static struct da9063_dev_model regulators_models[] = {
585         {
586                 .regulator_info = da9063_regulator_info,
587                 .n_regulators = ARRAY_SIZE(da9063_regulator_info),
588                 .dev_model = PMIC_DA9063,
589         },
590         { }
591 };
592 
593 /* Regulator interrupt handlers */
594 static irqreturn_t da9063_ldo_lim_event(int irq, void *data)
595 {
596         struct da9063_regulators *regulators = data;
597         struct da9063 *hw = regulators->regulator[0].hw;
598         struct da9063_regulator *regl;
599         int bits, i , ret;
600 
601         ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
602         if (ret < 0)
603                 return IRQ_NONE;
604 
605         for (i = regulators->n_regulators - 1; i >= 0; i--) {
606                 regl = &regulators->regulator[i];
607                 if (regl->info->oc_event.reg != DA9063_REG_STATUS_D)
608                         continue;
609 
610                 if (BIT(regl->info->oc_event.lsb) & bits)
611                         regulator_notifier_call_chain(regl->rdev,
612                                         REGULATOR_EVENT_OVER_CURRENT, NULL);
613         }
614 
615         return IRQ_HANDLED;
616 }
617 
618 /*
619  * Probing and Initialisation functions
620  */
621 static const struct regulator_init_data *da9063_get_regulator_initdata(
622                 const struct da9063_regulators_pdata *regl_pdata, int id)
623 {
624         int i;
625 
626         for (i = 0; i < regl_pdata->n_regulators; i++) {
627                 if (id == regl_pdata->regulator_data[i].id)
628                         return regl_pdata->regulator_data[i].initdata;
629         }
630 
631         return NULL;
632 }
633 
634 #ifdef CONFIG_OF
635 static struct of_regulator_match da9063_matches[] = {
636         [DA9063_ID_BCORE1]           = { .name = "bcore1"           },
637         [DA9063_ID_BCORE2]           = { .name = "bcore2"           },
638         [DA9063_ID_BPRO]             = { .name = "bpro",            },
639         [DA9063_ID_BMEM]             = { .name = "bmem",            },
640         [DA9063_ID_BIO]              = { .name = "bio",             },
641         [DA9063_ID_BPERI]            = { .name = "bperi",           },
642         [DA9063_ID_BCORES_MERGED]    = { .name = "bcores-merged"    },
643         [DA9063_ID_BMEM_BIO_MERGED]  = { .name = "bmem-bio-merged", },
644         [DA9063_ID_LDO1]             = { .name = "ldo1",            },
645         [DA9063_ID_LDO2]             = { .name = "ldo2",            },
646         [DA9063_ID_LDO3]             = { .name = "ldo3",            },
647         [DA9063_ID_LDO4]             = { .name = "ldo4",            },
648         [DA9063_ID_LDO5]             = { .name = "ldo5",            },
649         [DA9063_ID_LDO6]             = { .name = "ldo6",            },
650         [DA9063_ID_LDO7]             = { .name = "ldo7",            },
651         [DA9063_ID_LDO8]             = { .name = "ldo8",            },
652         [DA9063_ID_LDO9]             = { .name = "ldo9",            },
653         [DA9063_ID_LDO10]            = { .name = "ldo10",           },
654         [DA9063_ID_LDO11]            = { .name = "ldo11",           },
655 };
656 
657 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
658                 struct platform_device *pdev,
659                 struct of_regulator_match **da9063_reg_matches)
660 {
661         struct da9063_regulators_pdata *pdata;
662         struct da9063_regulator_data *rdata;
663         struct device_node *node;
664         int i, n, num;
665 
666         node = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
667         if (!node) {
668                 dev_err(&pdev->dev, "Regulators device node not found\n");
669                 return ERR_PTR(-ENODEV);
670         }
671 
672         num = of_regulator_match(&pdev->dev, node, da9063_matches,
673                                  ARRAY_SIZE(da9063_matches));
674         of_node_put(node);
675         if (num < 0) {
676                 dev_err(&pdev->dev, "Failed to match regulators\n");
677                 return ERR_PTR(-EINVAL);
678         }
679 
680         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
681         if (!pdata)
682                 return ERR_PTR(-ENOMEM);
683 
684         pdata->regulator_data = devm_kzalloc(&pdev->dev,
685                                         num * sizeof(*pdata->regulator_data),
686                                         GFP_KERNEL);
687         if (!pdata->regulator_data)
688                 return ERR_PTR(-ENOMEM);
689         pdata->n_regulators = num;
690 
691         n = 0;
692         for (i = 0; i < ARRAY_SIZE(da9063_matches); i++) {
693                 if (!da9063_matches[i].init_data)
694                         continue;
695 
696                 rdata = &pdata->regulator_data[n];
697                 rdata->id = i;
698                 rdata->initdata = da9063_matches[i].init_data;
699 
700                 n++;
701         };
702 
703         *da9063_reg_matches = da9063_matches;
704         return pdata;
705 }
706 #else
707 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
708                 struct platform_device *pdev,
709                 struct of_regulator_match **da9063_reg_matches)
710 {
711         *da9063_reg_matches = NULL;
712         return ERR_PTR(-ENODEV);
713 }
714 #endif
715 
716 static int da9063_regulator_probe(struct platform_device *pdev)
717 {
718         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
719         struct da9063_pdata *da9063_pdata = dev_get_platdata(da9063->dev);
720         struct of_regulator_match *da9063_reg_matches = NULL;
721         struct da9063_regulators_pdata *regl_pdata;
722         const struct da9063_dev_model *model;
723         struct da9063_regulators *regulators;
724         struct da9063_regulator *regl;
725         struct regulator_config config;
726         bool bcores_merged, bmem_bio_merged;
727         int id, irq, n, n_regulators, ret, val;
728         size_t size;
729 
730         regl_pdata = da9063_pdata ? da9063_pdata->regulators_pdata : NULL;
731 
732         if (!regl_pdata)
733                 regl_pdata = da9063_parse_regulators_dt(pdev,
734                                                         &da9063_reg_matches);
735 
736         if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
737                 dev_err(&pdev->dev,
738                         "No regulators defined for the platform\n");
739                 return PTR_ERR(regl_pdata);
740         }
741 
742         /* Find regulators set for particular device model */
743         for (model = regulators_models; model->regulator_info; model++) {
744                 if (model->dev_model == da9063->model)
745                         break;
746         }
747         if (!model->regulator_info) {
748                 dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
749                         da9063->model);
750                 return -ENODEV;
751         }
752 
753         ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
754         if (ret < 0) {
755                 dev_err(&pdev->dev,
756                         "Error while reading BUCKs configuration\n");
757                 return ret;
758         }
759         bcores_merged = val & DA9063_BCORE_MERGE;
760         bmem_bio_merged = val & DA9063_BUCK_MERGE;
761 
762         n_regulators = model->n_regulators;
763         if (bcores_merged)
764                 n_regulators -= 2; /* remove BCORE1, BCORE2 */
765         else
766                 n_regulators--;    /* remove BCORES_MERGED */
767         if (bmem_bio_merged)
768                 n_regulators -= 2; /* remove BMEM, BIO */
769         else
770                 n_regulators--;    /* remove BMEM_BIO_MERGED */
771 
772         /* Allocate memory required by usable regulators */
773         size = sizeof(struct da9063_regulators) +
774                 n_regulators * sizeof(struct da9063_regulator);
775         regulators = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
776         if (!regulators)
777                 return -ENOMEM;
778 
779         regulators->n_regulators = n_regulators;
780         platform_set_drvdata(pdev, regulators);
781 
782         /* Register all regulators declared in platform information */
783         n = 0;
784         id = 0;
785         while (n < regulators->n_regulators) {
786                 /* Skip regulator IDs depending on merge mode configuration */
787                 switch (id) {
788                 case DA9063_ID_BCORE1:
789                 case DA9063_ID_BCORE2:
790                         if (bcores_merged) {
791                                 id++;
792                                 continue;
793                         }
794                         break;
795                 case DA9063_ID_BMEM:
796                 case DA9063_ID_BIO:
797                         if (bmem_bio_merged) {
798                                 id++;
799                                 continue;
800                         }
801                         break;
802                 case DA9063_ID_BCORES_MERGED:
803                         if (!bcores_merged) {
804                                 id++;
805                                 continue;
806                         }
807                         break;
808                 case DA9063_ID_BMEM_BIO_MERGED:
809                         if (!bmem_bio_merged) {
810                                 id++;
811                                 continue;
812                         }
813                         break;
814                 }
815 
816                 /* Initialise regulator structure */
817                 regl = &regulators->regulator[n];
818                 regl->hw = da9063;
819                 regl->info = &model->regulator_info[id];
820                 regl->desc = regl->info->desc;
821                 regl->desc.type = REGULATOR_VOLTAGE;
822                 regl->desc.owner = THIS_MODULE;
823 
824                 if (regl->info->mode.reg)
825                         regl->mode = devm_regmap_field_alloc(&pdev->dev,
826                                         da9063->regmap, regl->info->mode);
827                 if (regl->info->suspend.reg)
828                         regl->suspend = devm_regmap_field_alloc(&pdev->dev,
829                                         da9063->regmap, regl->info->suspend);
830                 if (regl->info->sleep.reg)
831                         regl->sleep = devm_regmap_field_alloc(&pdev->dev,
832                                         da9063->regmap, regl->info->sleep);
833                 if (regl->info->suspend_sleep.reg)
834                         regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
835                                         da9063->regmap, regl->info->suspend_sleep);
836                 if (regl->info->ilimit.reg)
837                         regl->ilimit = devm_regmap_field_alloc(&pdev->dev,
838                                         da9063->regmap, regl->info->ilimit);
839 
840                 /* Register regulator */
841                 memset(&config, 0, sizeof(config));
842                 config.dev = &pdev->dev;
843                 config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
844                 config.driver_data = regl;
845                 if (da9063_reg_matches)
846                         config.of_node = da9063_reg_matches[id].of_node;
847                 config.regmap = da9063->regmap;
848                 regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
849                                                      &config);
850                 if (IS_ERR(regl->rdev)) {
851                         dev_err(&pdev->dev,
852                                 "Failed to register %s regulator\n",
853                                 regl->desc.name);
854                         return PTR_ERR(regl->rdev);
855                 }
856                 id++;
857                 n++;
858         }
859 
860         /* LDOs overcurrent event support */
861         irq = platform_get_irq_byname(pdev, "LDO_LIM");
862         if (irq < 0) {
863                 dev_err(&pdev->dev, "Failed to get IRQ.\n");
864                 return irq;
865         }
866 
867         ret = devm_request_threaded_irq(&pdev->dev, irq,
868                                 NULL, da9063_ldo_lim_event,
869                                 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
870                                 "LDO_LIM", regulators);
871         if (ret) {
872                 dev_err(&pdev->dev, "Failed to request LDO_LIM IRQ.\n");
873                 return ret;
874         }
875 
876         return 0;
877 }
878 
879 static struct platform_driver da9063_regulator_driver = {
880         .driver = {
881                 .name = DA9063_DRVNAME_REGULATORS,
882         },
883         .probe = da9063_regulator_probe,
884 };
885 
886 static int __init da9063_regulator_init(void)
887 {
888         return platform_driver_register(&da9063_regulator_driver);
889 }
890 subsys_initcall(da9063_regulator_init);
891 
892 static void __exit da9063_regulator_cleanup(void)
893 {
894         platform_driver_unregister(&da9063_regulator_driver);
895 }
896 module_exit(da9063_regulator_cleanup);
897 
898 
899 /* Module information */
900 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
901 MODULE_DESCRIPTION("DA9063 regulators driver");
902 MODULE_LICENSE("GPL");
903 MODULE_ALIAS("paltform:" DA9063_DRVNAME_REGULATORS);
904 

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