Merge remote-tracking branch 'airlied/drm-next' into drm-intel-next
[firefly-linux-kernel-4.4.55.git] / drivers / regulator / da9062-regulator.c
1 /*
2  * da9062-regulator.c - REGULATOR device driver for DA9062
3  * Copyright (C) 2015  Dialog Semiconductor Ltd.
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License
7  * as published by the Free Software Foundation; either version 2
8  * of the License, or (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  */
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/err.h>
19 #include <linux/slab.h>
20 #include <linux/of.h>
21 #include <linux/platform_device.h>
22 #include <linux/regmap.h>
23 #include <linux/regulator/driver.h>
24 #include <linux/regulator/machine.h>
25 #include <linux/regulator/of_regulator.h>
26 #include <linux/mfd/da9062/core.h>
27 #include <linux/mfd/da9062/registers.h>
28
29 /* Regulator IDs */
30 enum {
31         DA9062_ID_BUCK1,
32         DA9062_ID_BUCK2,
33         DA9062_ID_BUCK3,
34         DA9062_ID_BUCK4,
35         DA9062_ID_LDO1,
36         DA9062_ID_LDO2,
37         DA9062_ID_LDO3,
38         DA9062_ID_LDO4,
39         DA9062_MAX_REGULATORS,
40 };
41
42 /* Regulator capabilities and registers description */
43 struct da9062_regulator_info {
44         struct regulator_desc desc;
45         /* Current limiting */
46         unsigned int n_current_limits;
47         const int *current_limits;
48         /* Main register fields */
49         struct reg_field mode;
50         struct reg_field suspend;
51         struct reg_field sleep;
52         struct reg_field suspend_sleep;
53         unsigned int suspend_vsel_reg;
54         struct reg_field ilimit;
55         /* Event detection bit */
56         struct reg_field oc_event;
57 };
58
59 /* Single regulator settings */
60 struct da9062_regulator {
61         struct regulator_desc                   desc;
62         struct regulator_dev                    *rdev;
63         struct da9062                           *hw;
64         const struct da9062_regulator_info      *info;
65
66         struct regmap_field                     *mode;
67         struct regmap_field                     *suspend;
68         struct regmap_field                     *sleep;
69         struct regmap_field                     *suspend_sleep;
70         struct regmap_field                     *ilimit;
71 };
72
73 /* Encapsulates all information for the regulators driver */
74 struct da9062_regulators {
75         int                                     irq_ldo_lim;
76         unsigned                                n_regulators;
77         /* Array size to be defined during init. Keep at end. */
78         struct da9062_regulator                 regulator[0];
79 };
80
81 /* BUCK modes */
82 enum {
83         BUCK_MODE_MANUAL,       /* 0 */
84         BUCK_MODE_SLEEP,        /* 1 */
85         BUCK_MODE_SYNC,         /* 2 */
86         BUCK_MODE_AUTO          /* 3 */
87 };
88
89 /* Regulator operations */
90
91 /* Current limits array (in uA) BUCK1 and BUCK3.
92    Entry indexes corresponds to register values. */
93 static const int da9062_buck_a_limits[] = {
94          500000,  600000,  700000,  800000,  900000, 1000000, 1100000, 1200000,
95         1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
96 };
97
98 /* Current limits array (in uA) for BUCK2.
99    Entry indexes corresponds to register values. */
100 static const int da9062_buck_b_limits[] = {
101         1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
102         2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
103 };
104
105 static int da9062_set_current_limit(struct regulator_dev *rdev,
106                                     int min_ua, int max_ua)
107 {
108         struct da9062_regulator *regl = rdev_get_drvdata(rdev);
109         const struct da9062_regulator_info *rinfo = regl->info;
110         int n, tval;
111
112         for (n = 0; n < rinfo->n_current_limits; n++) {
113                 tval = rinfo->current_limits[n];
114                 if (tval >= min_ua && tval <= max_ua)
115                         return regmap_field_write(regl->ilimit, n);
116         }
117
118         return -EINVAL;
119 }
120
121 static int da9062_get_current_limit(struct regulator_dev *rdev)
122 {
123         struct da9062_regulator *regl = rdev_get_drvdata(rdev);
124         const struct da9062_regulator_info *rinfo = regl->info;
125         unsigned int sel;
126         int ret;
127
128         ret = regmap_field_read(regl->ilimit, &sel);
129         if (ret < 0)
130                 return ret;
131
132         if (sel >= rinfo->n_current_limits)
133                 sel = rinfo->n_current_limits - 1;
134
135         return rinfo->current_limits[sel];
136 }
137
138 static int da9062_buck_set_mode(struct regulator_dev *rdev, unsigned mode)
139 {
140         struct da9062_regulator *regl = rdev_get_drvdata(rdev);
141         unsigned val;
142
143         switch (mode) {
144         case REGULATOR_MODE_FAST:
145                 val = BUCK_MODE_SYNC;
146                 break;
147         case REGULATOR_MODE_NORMAL:
148                 val = BUCK_MODE_AUTO;
149                 break;
150         case REGULATOR_MODE_STANDBY:
151                 val = BUCK_MODE_SLEEP;
152                 break;
153         default:
154                 return -EINVAL;
155         }
156
157         return regmap_field_write(regl->mode, val);
158 }
159
160 /*
161  * Bucks use single mode register field for normal operation
162  * and suspend state.
163  * There are 3 modes to map to: FAST, NORMAL, and STANDBY.
164  */
165
166 static unsigned da9062_buck_get_mode(struct regulator_dev *rdev)
167 {
168         struct da9062_regulator *regl = rdev_get_drvdata(rdev);
169         struct regmap_field *field;
170         unsigned int val, mode = 0;
171         int ret;
172
173         ret = regmap_field_read(regl->mode, &val);
174         if (ret < 0)
175                 return ret;
176
177         switch (val) {
178         default:
179         case BUCK_MODE_MANUAL:
180                 mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY;
181                 /* Sleep flag bit decides the mode */
182                 break;
183         case BUCK_MODE_SLEEP:
184                 return REGULATOR_MODE_STANDBY;
185         case BUCK_MODE_SYNC:
186                 return REGULATOR_MODE_FAST;
187         case BUCK_MODE_AUTO:
188                 return REGULATOR_MODE_NORMAL;
189         }
190
191         /* Detect current regulator state */
192         ret = regmap_field_read(regl->suspend, &val);
193         if (ret < 0)
194                 return 0;
195
196         /* Read regulator mode from proper register, depending on state */
197         if (val)
198                 field = regl->suspend_sleep;
199         else
200                 field = regl->sleep;
201
202         ret = regmap_field_read(field, &val);
203         if (ret < 0)
204                 return 0;
205
206         if (val)
207                 mode &= REGULATOR_MODE_STANDBY;
208         else
209                 mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST;
210
211         return mode;
212 }
213
214 /*
215  * LDOs use sleep flags - one for normal and one for suspend state.
216  * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state.
217  */
218
219 static int da9062_ldo_set_mode(struct regulator_dev *rdev, unsigned mode)
220 {
221         struct da9062_regulator *regl = rdev_get_drvdata(rdev);
222         unsigned val;
223
224         switch (mode) {
225         case REGULATOR_MODE_NORMAL:
226                 val = 0;
227                 break;
228         case REGULATOR_MODE_STANDBY:
229                 val = 1;
230                 break;
231         default:
232                 return -EINVAL;
233         }
234
235         return regmap_field_write(regl->sleep, val);
236 }
237
238 static unsigned da9062_ldo_get_mode(struct regulator_dev *rdev)
239 {
240         struct da9062_regulator *regl = rdev_get_drvdata(rdev);
241         struct regmap_field *field;
242         int ret, val;
243
244         /* Detect current regulator state */
245         ret = regmap_field_read(regl->suspend, &val);
246         if (ret < 0)
247                 return 0;
248
249         /* Read regulator mode from proper register, depending on state */
250         if (val)
251                 field = regl->suspend_sleep;
252         else
253                 field = regl->sleep;
254
255         ret = regmap_field_read(field, &val);
256         if (ret < 0)
257                 return 0;
258
259         if (val)
260                 return REGULATOR_MODE_STANDBY;
261         else
262                 return REGULATOR_MODE_NORMAL;
263 }
264
265 static int da9062_buck_get_status(struct regulator_dev *rdev)
266 {
267         int ret = regulator_is_enabled_regmap(rdev);
268
269         if (ret == 0) {
270                 ret = REGULATOR_STATUS_OFF;
271         } else if (ret > 0) {
272                 ret = da9062_buck_get_mode(rdev);
273                 if (ret > 0)
274                         ret = regulator_mode_to_status(ret);
275                 else if (ret == 0)
276                         ret = -EIO;
277         }
278
279         return ret;
280 }
281
282 static int da9062_ldo_get_status(struct regulator_dev *rdev)
283 {
284         int ret = regulator_is_enabled_regmap(rdev);
285
286         if (ret == 0) {
287                 ret = REGULATOR_STATUS_OFF;
288         } else if (ret > 0) {
289                 ret = da9062_ldo_get_mode(rdev);
290                 if (ret > 0)
291                         ret = regulator_mode_to_status(ret);
292                 else if (ret == 0)
293                         ret = -EIO;
294         }
295
296         return ret;
297 }
298
299 static int da9062_set_suspend_voltage(struct regulator_dev *rdev, int uv)
300 {
301         struct da9062_regulator *regl = rdev_get_drvdata(rdev);
302         const struct da9062_regulator_info *rinfo = regl->info;
303         int ret, sel;
304
305         sel = regulator_map_voltage_linear(rdev, uv, uv);
306         if (sel < 0)
307                 return sel;
308
309         sel <<= ffs(rdev->desc->vsel_mask) - 1;
310
311         ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg,
312                                  rdev->desc->vsel_mask, sel);
313
314         return ret;
315 }
316
317 static int da9062_suspend_enable(struct regulator_dev *rdev)
318 {
319         struct da9062_regulator *regl = rdev_get_drvdata(rdev);
320
321         return regmap_field_write(regl->suspend, 1);
322 }
323
324 static int da9062_suspend_disable(struct regulator_dev *rdev)
325 {
326         struct da9062_regulator *regl = rdev_get_drvdata(rdev);
327
328         return regmap_field_write(regl->suspend, 0);
329 }
330
331 static int da9062_buck_set_suspend_mode(struct regulator_dev *rdev,
332                                         unsigned mode)
333 {
334         struct da9062_regulator *regl = rdev_get_drvdata(rdev);
335         int val;
336
337         switch (mode) {
338         case REGULATOR_MODE_FAST:
339                 val = BUCK_MODE_SYNC;
340                 break;
341         case REGULATOR_MODE_NORMAL:
342                 val = BUCK_MODE_AUTO;
343                 break;
344         case REGULATOR_MODE_STANDBY:
345                 val = BUCK_MODE_SLEEP;
346                 break;
347         default:
348                 return -EINVAL;
349         }
350
351         return regmap_field_write(regl->mode, val);
352 }
353
354 static int da9062_ldo_set_suspend_mode(struct regulator_dev *rdev,
355                                                 unsigned mode)
356 {
357         struct da9062_regulator *regl = rdev_get_drvdata(rdev);
358         unsigned val;
359
360         switch (mode) {
361         case REGULATOR_MODE_NORMAL:
362                 val = 0;
363                 break;
364         case REGULATOR_MODE_STANDBY:
365                 val = 1;
366                 break;
367         default:
368                 return -EINVAL;
369         }
370
371         return regmap_field_write(regl->suspend_sleep, val);
372 }
373
374 static struct regulator_ops da9062_buck_ops = {
375         .enable                 = regulator_enable_regmap,
376         .disable                = regulator_disable_regmap,
377         .is_enabled             = regulator_is_enabled_regmap,
378         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
379         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
380         .list_voltage           = regulator_list_voltage_linear,
381         .set_current_limit      = da9062_set_current_limit,
382         .get_current_limit      = da9062_get_current_limit,
383         .set_mode               = da9062_buck_set_mode,
384         .get_mode               = da9062_buck_get_mode,
385         .get_status             = da9062_buck_get_status,
386         .set_suspend_voltage    = da9062_set_suspend_voltage,
387         .set_suspend_enable     = da9062_suspend_enable,
388         .set_suspend_disable    = da9062_suspend_disable,
389         .set_suspend_mode       = da9062_buck_set_suspend_mode,
390 };
391
392 static struct regulator_ops da9062_ldo_ops = {
393         .enable                 = regulator_enable_regmap,
394         .disable                = regulator_disable_regmap,
395         .is_enabled             = regulator_is_enabled_regmap,
396         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
397         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
398         .list_voltage           = regulator_list_voltage_linear,
399         .set_mode               = da9062_ldo_set_mode,
400         .get_mode               = da9062_ldo_get_mode,
401         .get_status             = da9062_ldo_get_status,
402         .set_suspend_voltage    = da9062_set_suspend_voltage,
403         .set_suspend_enable     = da9062_suspend_enable,
404         .set_suspend_disable    = da9062_suspend_disable,
405         .set_suspend_mode       = da9062_ldo_set_suspend_mode,
406 };
407
408 /* Regulator information */
409 static const struct da9062_regulator_info local_regulator_info[] = {
410         {
411                 .desc.id = DA9062_ID_BUCK1,
412                 .desc.name = "DA9062 BUCK1",
413                 .desc.of_match = of_match_ptr("buck1"),
414                 .desc.regulators_node = of_match_ptr("regulators"),
415                 .desc.ops = &da9062_buck_ops,
416                 .desc.min_uV = (300) * 1000,
417                 .desc.uV_step = (10) * 1000,
418                 .desc.n_voltages = ((1570) - (300))/(10) + 1,
419                 .current_limits = da9062_buck_a_limits,
420                 .n_current_limits = ARRAY_SIZE(da9062_buck_a_limits),
421                 .desc.enable_reg = DA9062AA_BUCK1_CONT,
422                 .desc.enable_mask = DA9062AA_BUCK1_EN_MASK,
423                 .desc.vsel_reg = DA9062AA_VBUCK1_A,
424                 .desc.vsel_mask = DA9062AA_VBUCK1_A_MASK,
425                 .desc.linear_min_sel = 0,
426                 .sleep = REG_FIELD(DA9062AA_VBUCK1_A,
427                         __builtin_ffs((int)DA9062AA_BUCK1_SL_A_MASK) - 1,
428                         sizeof(unsigned int) * 8 -
429                         __builtin_clz((DA9062AA_BUCK1_SL_A_MASK)) - 1),
430                 .suspend_sleep = REG_FIELD(DA9062AA_VBUCK1_B,
431                         __builtin_ffs((int)DA9062AA_BUCK1_SL_B_MASK) - 1,
432                         sizeof(unsigned int) * 8 -
433                         __builtin_clz((DA9062AA_BUCK1_SL_B_MASK)) - 1),
434                 .suspend_vsel_reg = DA9062AA_VBUCK1_B,
435                 .mode = REG_FIELD(DA9062AA_BUCK1_CFG,
436                         __builtin_ffs((int)DA9062AA_BUCK1_MODE_MASK) - 1,
437                         sizeof(unsigned int) * 8 -
438                         __builtin_clz((DA9062AA_BUCK1_MODE_MASK)) - 1),
439                 .suspend = REG_FIELD(DA9062AA_DVC_1,
440                         __builtin_ffs((int)DA9062AA_VBUCK1_SEL_MASK) - 1,
441                         sizeof(unsigned int) * 8 -
442                         __builtin_clz((DA9062AA_VBUCK1_SEL_MASK)) - 1),
443                 .ilimit = REG_FIELD(DA9062AA_BUCK_ILIM_C,
444                         __builtin_ffs((int)DA9062AA_BUCK1_ILIM_MASK) - 1,
445                         sizeof(unsigned int) * 8 -
446                         __builtin_clz((DA9062AA_BUCK1_ILIM_MASK)) - 1),
447         },
448         {
449                 .desc.id = DA9062_ID_BUCK2,
450                 .desc.name = "DA9062 BUCK2",
451                 .desc.of_match = of_match_ptr("buck2"),
452                 .desc.regulators_node = of_match_ptr("regulators"),
453                 .desc.ops = &da9062_buck_ops,
454                 .desc.min_uV = (300) * 1000,
455                 .desc.uV_step = (10) * 1000,
456                 .desc.n_voltages = ((1570) - (300))/(10) + 1,
457                 .current_limits = da9062_buck_a_limits,
458                 .n_current_limits = ARRAY_SIZE(da9062_buck_a_limits),
459                 .desc.enable_reg = DA9062AA_BUCK2_CONT,
460                 .desc.enable_mask = DA9062AA_BUCK2_EN_MASK,
461                 .desc.vsel_reg = DA9062AA_VBUCK2_A,
462                 .desc.vsel_mask = DA9062AA_VBUCK2_A_MASK,
463                 .desc.linear_min_sel = 0,
464                 .sleep = REG_FIELD(DA9062AA_VBUCK2_A,
465                         __builtin_ffs((int)DA9062AA_BUCK2_SL_A_MASK) - 1,
466                         sizeof(unsigned int) * 8 -
467                         __builtin_clz((DA9062AA_BUCK2_SL_A_MASK)) - 1),
468                 .suspend_sleep = REG_FIELD(DA9062AA_VBUCK2_B,
469                         __builtin_ffs((int)DA9062AA_BUCK2_SL_B_MASK) - 1,
470                         sizeof(unsigned int) * 8 -
471                         __builtin_clz((DA9062AA_BUCK2_SL_B_MASK)) - 1),
472                 .suspend_vsel_reg = DA9062AA_VBUCK2_B,
473                 .mode = REG_FIELD(DA9062AA_BUCK2_CFG,
474                         __builtin_ffs((int)DA9062AA_BUCK2_MODE_MASK) - 1,
475                         sizeof(unsigned int) * 8 -
476                         __builtin_clz((DA9062AA_BUCK2_MODE_MASK)) - 1),
477                 .suspend = REG_FIELD(DA9062AA_DVC_1,
478                         __builtin_ffs((int)DA9062AA_VBUCK2_SEL_MASK) - 1,
479                         sizeof(unsigned int) * 8 -
480                         __builtin_clz((DA9062AA_VBUCK2_SEL_MASK)) - 1),
481                 .ilimit = REG_FIELD(DA9062AA_BUCK_ILIM_C,
482                         __builtin_ffs((int)DA9062AA_BUCK2_ILIM_MASK) - 1,
483                         sizeof(unsigned int) * 8 -
484                         __builtin_clz((DA9062AA_BUCK2_ILIM_MASK)) - 1),
485         },
486         {
487                 .desc.id = DA9062_ID_BUCK3,
488                 .desc.name = "DA9062 BUCK3",
489                 .desc.of_match = of_match_ptr("buck3"),
490                 .desc.regulators_node = of_match_ptr("regulators"),
491                 .desc.ops = &da9062_buck_ops,
492                 .desc.min_uV = (800) * 1000,
493                 .desc.uV_step = (20) * 1000,
494                 .desc.n_voltages = ((3340) - (800))/(20) + 1,
495                 .current_limits = da9062_buck_b_limits,
496                 .n_current_limits = ARRAY_SIZE(da9062_buck_b_limits),
497                 .desc.enable_reg = DA9062AA_BUCK3_CONT,
498                 .desc.enable_mask = DA9062AA_BUCK3_EN_MASK,
499                 .desc.vsel_reg = DA9062AA_VBUCK3_A,
500                 .desc.vsel_mask = DA9062AA_VBUCK3_A_MASK,
501                 .desc.linear_min_sel = 0,
502                 .sleep = REG_FIELD(DA9062AA_VBUCK3_A,
503                         __builtin_ffs((int)DA9062AA_BUCK3_SL_A_MASK) - 1,
504                         sizeof(unsigned int) * 8 -
505                         __builtin_clz((DA9062AA_BUCK3_SL_A_MASK)) - 1),
506                 .suspend_sleep = REG_FIELD(DA9062AA_VBUCK3_B,
507                         __builtin_ffs((int)DA9062AA_BUCK3_SL_B_MASK) - 1,
508                         sizeof(unsigned int) * 8 -
509                         __builtin_clz((DA9062AA_BUCK3_SL_B_MASK)) - 1),
510                 .suspend_vsel_reg = DA9062AA_VBUCK3_B,
511                 .mode = REG_FIELD(DA9062AA_BUCK3_CFG,
512                         __builtin_ffs((int)DA9062AA_BUCK3_MODE_MASK) - 1,
513                         sizeof(unsigned int) * 8 -
514                         __builtin_clz((DA9062AA_BUCK3_MODE_MASK)) - 1),
515                 .suspend = REG_FIELD(DA9062AA_DVC_1,
516                         __builtin_ffs((int)DA9062AA_VBUCK3_SEL_MASK) - 1,
517                         sizeof(unsigned int) * 8 -
518                         __builtin_clz((DA9062AA_VBUCK3_SEL_MASK)) - 1),
519                 .ilimit = REG_FIELD(DA9062AA_BUCK_ILIM_A,
520                         __builtin_ffs((int)DA9062AA_BUCK3_ILIM_MASK) - 1,
521                         sizeof(unsigned int) * 8 -
522                         __builtin_clz((DA9062AA_BUCK3_ILIM_MASK)) - 1),
523         },
524         {
525                 .desc.id = DA9062_ID_BUCK4,
526                 .desc.name = "DA9062 BUCK4",
527                 .desc.of_match = of_match_ptr("buck4"),
528                 .desc.regulators_node = of_match_ptr("regulators"),
529                 .desc.ops = &da9062_buck_ops,
530                 .desc.min_uV = (530) * 1000,
531                 .desc.uV_step = (10) * 1000,
532                 .desc.n_voltages = ((1800) - (530))/(10) + 1,
533                 .current_limits = da9062_buck_a_limits,
534                 .n_current_limits = ARRAY_SIZE(da9062_buck_a_limits),
535                 .desc.enable_reg = DA9062AA_BUCK4_CONT,
536                 .desc.enable_mask = DA9062AA_BUCK4_EN_MASK,
537                 .desc.vsel_reg = DA9062AA_VBUCK4_A,
538                 .desc.vsel_mask = DA9062AA_VBUCK4_A_MASK,
539                 .desc.linear_min_sel = 0,
540                 .sleep = REG_FIELD(DA9062AA_VBUCK4_A,
541                         __builtin_ffs((int)DA9062AA_BUCK4_SL_A_MASK) - 1,
542                         sizeof(unsigned int) * 8 -
543                         __builtin_clz((DA9062AA_BUCK4_SL_A_MASK)) - 1),
544                 .suspend_sleep = REG_FIELD(DA9062AA_VBUCK4_B,
545                         __builtin_ffs((int)DA9062AA_BUCK4_SL_B_MASK) - 1,
546                         sizeof(unsigned int) * 8 -
547                         __builtin_clz((DA9062AA_BUCK4_SL_B_MASK)) - 1),
548                 .suspend_vsel_reg = DA9062AA_VBUCK4_B,
549                 .mode = REG_FIELD(DA9062AA_BUCK4_CFG,
550                         __builtin_ffs((int)DA9062AA_BUCK4_MODE_MASK) - 1,
551                         sizeof(unsigned int) * 8 -
552                         __builtin_clz((DA9062AA_BUCK4_MODE_MASK)) - 1),
553                 .suspend = REG_FIELD(DA9062AA_DVC_1,
554                         __builtin_ffs((int)DA9062AA_VBUCK4_SEL_MASK) - 1,
555                         sizeof(unsigned int) * 8 -
556                         __builtin_clz((DA9062AA_VBUCK4_SEL_MASK)) - 1),
557                 .ilimit = REG_FIELD(DA9062AA_BUCK_ILIM_B,
558                         __builtin_ffs((int)DA9062AA_BUCK4_ILIM_MASK) - 1,
559                         sizeof(unsigned int) * 8 -
560                         __builtin_clz((DA9062AA_BUCK4_ILIM_MASK)) - 1),
561         },
562         {
563                 .desc.id = DA9062_ID_LDO1,
564                 .desc.name = "DA9062 LDO1",
565                 .desc.of_match = of_match_ptr("ldo1"),
566                 .desc.regulators_node = of_match_ptr("regulators"),
567                 .desc.ops = &da9062_ldo_ops,
568                 .desc.min_uV = (900) * 1000,
569                 .desc.uV_step = (50) * 1000,
570                 .desc.n_voltages = ((3600) - (900))/(50) + 1,
571                 .desc.enable_reg = DA9062AA_LDO1_CONT,
572                 .desc.enable_mask = DA9062AA_LDO1_EN_MASK,
573                 .desc.vsel_reg = DA9062AA_VLDO1_A,
574                 .desc.vsel_mask = DA9062AA_VLDO1_A_MASK,
575                 .desc.linear_min_sel = 0,
576                 .sleep = REG_FIELD(DA9062AA_VLDO1_A,
577                         __builtin_ffs((int)DA9062AA_LDO1_SL_A_MASK) - 1,
578                         sizeof(unsigned int) * 8 -
579                         __builtin_clz((DA9062AA_LDO1_SL_A_MASK)) - 1),
580                 .suspend_sleep = REG_FIELD(DA9062AA_VLDO1_B,
581                         __builtin_ffs((int)DA9062AA_LDO1_SL_B_MASK) - 1,
582                         sizeof(unsigned int) * 8 -
583                         __builtin_clz((DA9062AA_LDO1_SL_B_MASK)) - 1),
584                 .suspend_vsel_reg = DA9062AA_VLDO1_B,
585                 .suspend = REG_FIELD(DA9062AA_DVC_1,
586                         __builtin_ffs((int)DA9062AA_VLDO1_SEL_MASK) - 1,
587                         sizeof(unsigned int) * 8 -
588                         __builtin_clz((DA9062AA_VLDO1_SEL_MASK)) - 1),
589                 .oc_event = REG_FIELD(DA9062AA_STATUS_D,
590                         __builtin_ffs((int)DA9062AA_LDO1_ILIM_MASK) - 1,
591                         sizeof(unsigned int) * 8 -
592                         __builtin_clz((DA9062AA_LDO1_ILIM_MASK)) - 1),
593         },
594         {
595                 .desc.id = DA9062_ID_LDO2,
596                 .desc.name = "DA9062 LDO2",
597                 .desc.of_match = of_match_ptr("ldo2"),
598                 .desc.regulators_node = of_match_ptr("regulators"),
599                 .desc.ops = &da9062_ldo_ops,
600                 .desc.min_uV = (900) * 1000,
601                 .desc.uV_step = (50) * 1000,
602                 .desc.n_voltages = ((3600) - (600))/(50) + 1,
603                 .desc.enable_reg = DA9062AA_LDO2_CONT,
604                 .desc.enable_mask = DA9062AA_LDO2_EN_MASK,
605                 .desc.vsel_reg = DA9062AA_VLDO2_A,
606                 .desc.vsel_mask = DA9062AA_VLDO2_A_MASK,
607                 .desc.linear_min_sel = 0,
608                 .sleep = REG_FIELD(DA9062AA_VLDO2_A,
609                         __builtin_ffs((int)DA9062AA_LDO2_SL_A_MASK) - 1,
610                         sizeof(unsigned int) * 8 -
611                         __builtin_clz((DA9062AA_LDO2_SL_A_MASK)) - 1),
612                 .suspend_sleep = REG_FIELD(DA9062AA_VLDO2_B,
613                         __builtin_ffs((int)DA9062AA_LDO2_SL_B_MASK) - 1,
614                         sizeof(unsigned int) * 8 -
615                         __builtin_clz((DA9062AA_LDO2_SL_B_MASK)) - 1),
616                 .suspend_vsel_reg = DA9062AA_VLDO2_B,
617                 .suspend = REG_FIELD(DA9062AA_DVC_1,
618                         __builtin_ffs((int)DA9062AA_VLDO2_SEL_MASK) - 1,
619                         sizeof(unsigned int) * 8 -
620                         __builtin_clz((DA9062AA_VLDO2_SEL_MASK)) - 1),
621                 .oc_event = REG_FIELD(DA9062AA_STATUS_D,
622                         __builtin_ffs((int)DA9062AA_LDO2_ILIM_MASK) - 1,
623                         sizeof(unsigned int) * 8 -
624                         __builtin_clz((DA9062AA_LDO2_ILIM_MASK)) - 1),
625         },
626         {
627                 .desc.id = DA9062_ID_LDO3,
628                 .desc.name = "DA9062 LDO3",
629                 .desc.of_match = of_match_ptr("ldo3"),
630                 .desc.regulators_node = of_match_ptr("regulators"),
631                 .desc.ops = &da9062_ldo_ops,
632                 .desc.min_uV = (900) * 1000,
633                 .desc.uV_step = (50) * 1000,
634                 .desc.n_voltages = ((3600) - (900))/(50) + 1,
635                 .desc.enable_reg = DA9062AA_LDO3_CONT,
636                 .desc.enable_mask = DA9062AA_LDO3_EN_MASK,
637                 .desc.vsel_reg = DA9062AA_VLDO3_A,
638                 .desc.vsel_mask = DA9062AA_VLDO3_A_MASK,
639                 .desc.linear_min_sel = 0,
640                 .sleep = REG_FIELD(DA9062AA_VLDO3_A,
641                         __builtin_ffs((int)DA9062AA_LDO3_SL_A_MASK) - 1,
642                         sizeof(unsigned int) * 8 -
643                         __builtin_clz((DA9062AA_LDO3_SL_A_MASK)) - 1),
644                 .suspend_sleep = REG_FIELD(DA9062AA_VLDO3_B,
645                         __builtin_ffs((int)DA9062AA_LDO3_SL_B_MASK) - 1,
646                         sizeof(unsigned int) * 8 -
647                         __builtin_clz((DA9062AA_LDO3_SL_B_MASK)) - 1),
648                 .suspend_vsel_reg = DA9062AA_VLDO3_B,
649                 .suspend = REG_FIELD(DA9062AA_DVC_1,
650                         __builtin_ffs((int)DA9062AA_VLDO3_SEL_MASK) - 1,
651                         sizeof(unsigned int) * 8 -
652                         __builtin_clz((DA9062AA_VLDO3_SEL_MASK)) - 1),
653                 .oc_event = REG_FIELD(DA9062AA_STATUS_D,
654                         __builtin_ffs((int)DA9062AA_LDO3_ILIM_MASK) - 1,
655                         sizeof(unsigned int) * 8 -
656                         __builtin_clz((DA9062AA_LDO3_ILIM_MASK)) - 1),
657         },
658         {
659                 .desc.id = DA9062_ID_LDO4,
660                 .desc.name = "DA9062 LDO4",
661                 .desc.of_match = of_match_ptr("ldo4"),
662                 .desc.regulators_node = of_match_ptr("regulators"),
663                 .desc.ops = &da9062_ldo_ops,
664                 .desc.min_uV = (900) * 1000,
665                 .desc.uV_step = (50) * 1000,
666                 .desc.n_voltages = ((3600) - (900))/(50) + 1,
667                 .desc.enable_reg = DA9062AA_LDO4_CONT,
668                 .desc.enable_mask = DA9062AA_LDO4_EN_MASK,
669                 .desc.vsel_reg = DA9062AA_VLDO4_A,
670                 .desc.vsel_mask = DA9062AA_VLDO4_A_MASK,
671                 .desc.linear_min_sel = 0,
672                 .sleep = REG_FIELD(DA9062AA_VLDO4_A,
673                         __builtin_ffs((int)DA9062AA_LDO4_SL_A_MASK) - 1,
674                         sizeof(unsigned int) * 8 -
675                         __builtin_clz((DA9062AA_LDO4_SL_A_MASK)) - 1),
676                 .suspend_sleep = REG_FIELD(DA9062AA_VLDO4_B,
677                         __builtin_ffs((int)DA9062AA_LDO4_SL_B_MASK) - 1,
678                         sizeof(unsigned int) * 8 -
679                         __builtin_clz((DA9062AA_LDO4_SL_B_MASK)) - 1),
680                 .suspend_vsel_reg = DA9062AA_VLDO4_B,
681                 .suspend = REG_FIELD(DA9062AA_DVC_1,
682                         __builtin_ffs((int)DA9062AA_VLDO4_SEL_MASK) - 1,
683                         sizeof(unsigned int) * 8 -
684                         __builtin_clz((DA9062AA_VLDO4_SEL_MASK)) - 1),
685                 .oc_event = REG_FIELD(DA9062AA_STATUS_D,
686                         __builtin_ffs((int)DA9062AA_LDO4_ILIM_MASK) - 1,
687                         sizeof(unsigned int) * 8 -
688                         __builtin_clz((DA9062AA_LDO4_ILIM_MASK)) - 1),
689         },
690 };
691
692 /* Regulator interrupt handlers */
693 static irqreturn_t da9062_ldo_lim_event(int irq, void *data)
694 {
695         struct da9062_regulators *regulators = data;
696         struct da9062 *hw = regulators->regulator[0].hw;
697         struct da9062_regulator *regl;
698         int handled = IRQ_NONE;
699         int bits, i, ret;
700
701         ret = regmap_read(hw->regmap, DA9062AA_STATUS_D, &bits);
702         if (ret < 0) {
703                 dev_err(hw->dev,
704                         "Failed to read LDO overcurrent indicator\n");
705                 goto ldo_lim_error;
706         }
707
708         for (i = regulators->n_regulators - 1; i >= 0; i--) {
709                 regl = &regulators->regulator[i];
710                 if (regl->info->oc_event.reg != DA9062AA_STATUS_D)
711                         continue;
712
713                 if (BIT(regl->info->oc_event.lsb) & bits) {
714                         regulator_notifier_call_chain(regl->rdev,
715                                         REGULATOR_EVENT_OVER_CURRENT, NULL);
716                         handled = IRQ_HANDLED;
717                 }
718         }
719
720 ldo_lim_error:
721         return handled;
722 }
723
724 static int da9062_regulator_probe(struct platform_device *pdev)
725 {
726         struct da9062 *chip = dev_get_drvdata(pdev->dev.parent);
727         struct da9062_regulators *regulators;
728         struct da9062_regulator *regl;
729         struct regulator_config config = { };
730         int irq, n, ret;
731         size_t size;
732
733         /* Allocate memory required by usable regulators */
734         size = sizeof(struct da9062_regulators) +
735                 DA9062_MAX_REGULATORS * sizeof(struct da9062_regulator);
736         regulators = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
737         if (!regulators)
738                 return -ENOMEM;
739
740         regulators->n_regulators = DA9062_MAX_REGULATORS;
741         platform_set_drvdata(pdev, regulators);
742
743         n = 0;
744         while (n < regulators->n_regulators) {
745                 /* Initialise regulator structure */
746                 regl = &regulators->regulator[n];
747                 regl->hw = chip;
748                 regl->info = &local_regulator_info[n];
749                 regl->desc = regl->info->desc;
750                 regl->desc.type = REGULATOR_VOLTAGE;
751                 regl->desc.owner = THIS_MODULE;
752
753                 if (regl->info->mode.reg)
754                         regl->mode = devm_regmap_field_alloc(
755                                         &pdev->dev,
756                                         chip->regmap,
757                                         regl->info->mode);
758                 if (regl->info->suspend.reg)
759                         regl->suspend = devm_regmap_field_alloc(
760                                         &pdev->dev,
761                                         chip->regmap,
762                                         regl->info->suspend);
763                 if (regl->info->sleep.reg)
764                         regl->sleep = devm_regmap_field_alloc(
765                                         &pdev->dev,
766                                         chip->regmap,
767                                         regl->info->sleep);
768                 if (regl->info->suspend_sleep.reg)
769                         regl->suspend_sleep = devm_regmap_field_alloc(
770                                         &pdev->dev,
771                                         chip->regmap,
772                                         regl->info->suspend_sleep);
773                 if (regl->info->ilimit.reg)
774                         regl->ilimit = devm_regmap_field_alloc(
775                                         &pdev->dev,
776                                         chip->regmap,
777                                         regl->info->ilimit);
778
779                 /* Register regulator */
780                 memset(&config, 0, sizeof(config));
781                 config.dev = chip->dev;
782                 config.driver_data = regl;
783                 config.regmap = chip->regmap;
784
785                 regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
786                                                      &config);
787                 if (IS_ERR(regl->rdev)) {
788                         dev_err(&pdev->dev,
789                                 "Failed to register %s regulator\n",
790                                 regl->desc.name);
791                         return PTR_ERR(regl->rdev);
792                 }
793
794                 n++;
795         }
796
797         /* LDOs overcurrent event support */
798         irq = platform_get_irq_byname(pdev, "LDO_LIM");
799         if (irq < 0) {
800                 dev_err(&pdev->dev, "Failed to get IRQ.\n");
801                 return irq;
802         }
803         regulators->irq_ldo_lim = irq;
804
805         ret = devm_request_threaded_irq(&pdev->dev, irq,
806                                         NULL, da9062_ldo_lim_event,
807                                         IRQF_TRIGGER_LOW | IRQF_ONESHOT,
808                                         "LDO_LIM", regulators);
809         if (ret) {
810                 dev_warn(&pdev->dev,
811                          "Failed to request LDO_LIM IRQ.\n");
812                 regulators->irq_ldo_lim = -ENXIO;
813         }
814
815         return 0;
816 }
817
818 static struct platform_driver da9062_regulator_driver = {
819         .driver = {
820                 .name = "da9062-regulators",
821         },
822         .probe = da9062_regulator_probe,
823 };
824
825 static int __init da9062_regulator_init(void)
826 {
827         return platform_driver_register(&da9062_regulator_driver);
828 }
829 subsys_initcall(da9062_regulator_init);
830
831 static void __exit da9062_regulator_cleanup(void)
832 {
833         platform_driver_unregister(&da9062_regulator_driver);
834 }
835 module_exit(da9062_regulator_cleanup);
836
837 /* Module information */
838 MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>");
839 MODULE_DESCRIPTION("REGULATOR device driver for Dialog DA9062");
840 MODULE_LICENSE("GPL");
841 MODULE_ALIAS("platform:da9062-regulators");