Version:  2.0.40 2.2.26 2.4.37 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 3.17

Linux/drivers/regulator/db8500-prcmu.c

  1 /*
  2  * Copyright (C) ST-Ericsson SA 2010
  3  *
  4  * License Terms: GNU General Public License v2
  5  * Authors: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
  6  *          Bengt Jonsson <bengt.g.jonsson@stericsson.com> for ST-Ericsson
  7  *
  8  * Power domain regulators on DB8500
  9  */
 10 
 11 #include <linux/kernel.h>
 12 #include <linux/init.h>
 13 #include <linux/err.h>
 14 #include <linux/spinlock.h>
 15 #include <linux/platform_device.h>
 16 #include <linux/mfd/dbx500-prcmu.h>
 17 #include <linux/regulator/driver.h>
 18 #include <linux/regulator/machine.h>
 19 #include <linux/regulator/db8500-prcmu.h>
 20 #include <linux/regulator/of_regulator.h>
 21 #include <linux/of.h>
 22 #include <linux/module.h>
 23 #include "dbx500-prcmu.h"
 24 
 25 static int db8500_regulator_enable(struct regulator_dev *rdev)
 26 {
 27         struct dbx500_regulator_info *info = rdev_get_drvdata(rdev);
 28 
 29         if (info == NULL)
 30                 return -EINVAL;
 31 
 32         dev_vdbg(rdev_get_dev(rdev), "regulator-%s-enable\n",
 33                 info->desc.name);
 34 
 35         if (!info->is_enabled) {
 36                 info->is_enabled = true;
 37                 if (!info->exclude_from_power_state)
 38                         power_state_active_enable();
 39         }
 40 
 41         return 0;
 42 }
 43 
 44 static int db8500_regulator_disable(struct regulator_dev *rdev)
 45 {
 46         struct dbx500_regulator_info *info = rdev_get_drvdata(rdev);
 47         int ret = 0;
 48 
 49         if (info == NULL)
 50                 return -EINVAL;
 51 
 52         dev_vdbg(rdev_get_dev(rdev), "regulator-%s-disable\n",
 53                 info->desc.name);
 54 
 55         if (info->is_enabled) {
 56                 info->is_enabled = false;
 57                 if (!info->exclude_from_power_state)
 58                         ret = power_state_active_disable();
 59         }
 60 
 61         return ret;
 62 }
 63 
 64 static int db8500_regulator_is_enabled(struct regulator_dev *rdev)
 65 {
 66         struct dbx500_regulator_info *info = rdev_get_drvdata(rdev);
 67 
 68         if (info == NULL)
 69                 return -EINVAL;
 70 
 71         dev_vdbg(rdev_get_dev(rdev), "regulator-%s-is_enabled (is_enabled):"
 72                 " %i\n", info->desc.name, info->is_enabled);
 73 
 74         return info->is_enabled;
 75 }
 76 
 77 /* db8500 regulator operations */
 78 static struct regulator_ops db8500_regulator_ops = {
 79         .enable                 = db8500_regulator_enable,
 80         .disable                = db8500_regulator_disable,
 81         .is_enabled             = db8500_regulator_is_enabled,
 82 };
 83 
 84 /*
 85  * EPOD control
 86  */
 87 static bool epod_on[NUM_EPOD_ID];
 88 static bool epod_ramret[NUM_EPOD_ID];
 89 
 90 static int enable_epod(u16 epod_id, bool ramret)
 91 {
 92         int ret;
 93 
 94         if (ramret) {
 95                 if (!epod_on[epod_id]) {
 96                         ret = prcmu_set_epod(epod_id, EPOD_STATE_RAMRET);
 97                         if (ret < 0)
 98                                 return ret;
 99                 }
100                 epod_ramret[epod_id] = true;
101         } else {
102                 ret = prcmu_set_epod(epod_id, EPOD_STATE_ON);
103                 if (ret < 0)
104                         return ret;
105                 epod_on[epod_id] = true;
106         }
107 
108         return 0;
109 }
110 
111 static int disable_epod(u16 epod_id, bool ramret)
112 {
113         int ret;
114 
115         if (ramret) {
116                 if (!epod_on[epod_id]) {
117                         ret = prcmu_set_epod(epod_id, EPOD_STATE_OFF);
118                         if (ret < 0)
119                                 return ret;
120                 }
121                 epod_ramret[epod_id] = false;
122         } else {
123                 if (epod_ramret[epod_id]) {
124                         ret = prcmu_set_epod(epod_id, EPOD_STATE_RAMRET);
125                         if (ret < 0)
126                                 return ret;
127                 } else {
128                         ret = prcmu_set_epod(epod_id, EPOD_STATE_OFF);
129                         if (ret < 0)
130                                 return ret;
131                 }
132                 epod_on[epod_id] = false;
133         }
134 
135         return 0;
136 }
137 
138 /*
139  * Regulator switch
140  */
141 static int db8500_regulator_switch_enable(struct regulator_dev *rdev)
142 {
143         struct dbx500_regulator_info *info = rdev_get_drvdata(rdev);
144         int ret;
145 
146         if (info == NULL)
147                 return -EINVAL;
148 
149         dev_vdbg(rdev_get_dev(rdev), "regulator-switch-%s-enable\n",
150                 info->desc.name);
151 
152         ret = enable_epod(info->epod_id, info->is_ramret);
153         if (ret < 0) {
154                 dev_err(rdev_get_dev(rdev),
155                         "regulator-switch-%s-enable: prcmu call failed\n",
156                         info->desc.name);
157                 goto out;
158         }
159 
160         info->is_enabled = true;
161 out:
162         return ret;
163 }
164 
165 static int db8500_regulator_switch_disable(struct regulator_dev *rdev)
166 {
167         struct dbx500_regulator_info *info = rdev_get_drvdata(rdev);
168         int ret;
169 
170         if (info == NULL)
171                 return -EINVAL;
172 
173         dev_vdbg(rdev_get_dev(rdev), "regulator-switch-%s-disable\n",
174                 info->desc.name);
175 
176         ret = disable_epod(info->epod_id, info->is_ramret);
177         if (ret < 0) {
178                 dev_err(rdev_get_dev(rdev),
179                         "regulator_switch-%s-disable: prcmu call failed\n",
180                         info->desc.name);
181                 goto out;
182         }
183 
184         info->is_enabled = 0;
185 out:
186         return ret;
187 }
188 
189 static int db8500_regulator_switch_is_enabled(struct regulator_dev *rdev)
190 {
191         struct dbx500_regulator_info *info = rdev_get_drvdata(rdev);
192 
193         if (info == NULL)
194                 return -EINVAL;
195 
196         dev_vdbg(rdev_get_dev(rdev),
197                 "regulator-switch-%s-is_enabled (is_enabled): %i\n",
198                 info->desc.name, info->is_enabled);
199 
200         return info->is_enabled;
201 }
202 
203 static struct regulator_ops db8500_regulator_switch_ops = {
204         .enable                 = db8500_regulator_switch_enable,
205         .disable                = db8500_regulator_switch_disable,
206         .is_enabled             = db8500_regulator_switch_is_enabled,
207 };
208 
209 /*
210  * Regulator information
211  */
212 static struct dbx500_regulator_info
213 dbx500_regulator_info[DB8500_NUM_REGULATORS] = {
214         [DB8500_REGULATOR_VAPE] = {
215                 .desc = {
216                         .name   = "db8500-vape",
217                         .id     = DB8500_REGULATOR_VAPE,
218                         .ops    = &db8500_regulator_ops,
219                         .type   = REGULATOR_VOLTAGE,
220                         .owner  = THIS_MODULE,
221                 },
222         },
223         [DB8500_REGULATOR_VARM] = {
224                 .desc = {
225                         .name   = "db8500-varm",
226                         .id     = DB8500_REGULATOR_VARM,
227                         .ops    = &db8500_regulator_ops,
228                         .type   = REGULATOR_VOLTAGE,
229                         .owner  = THIS_MODULE,
230                 },
231         },
232         [DB8500_REGULATOR_VMODEM] = {
233                 .desc = {
234                         .name   = "db8500-vmodem",
235                         .id     = DB8500_REGULATOR_VMODEM,
236                         .ops    = &db8500_regulator_ops,
237                         .type   = REGULATOR_VOLTAGE,
238                         .owner  = THIS_MODULE,
239                 },
240         },
241         [DB8500_REGULATOR_VPLL] = {
242                 .desc = {
243                         .name   = "db8500-vpll",
244                         .id     = DB8500_REGULATOR_VPLL,
245                         .ops    = &db8500_regulator_ops,
246                         .type   = REGULATOR_VOLTAGE,
247                         .owner  = THIS_MODULE,
248                 },
249         },
250         [DB8500_REGULATOR_VSMPS1] = {
251                 .desc = {
252                         .name   = "db8500-vsmps1",
253                         .id     = DB8500_REGULATOR_VSMPS1,
254                         .ops    = &db8500_regulator_ops,
255                         .type   = REGULATOR_VOLTAGE,
256                         .owner  = THIS_MODULE,
257                 },
258         },
259         [DB8500_REGULATOR_VSMPS2] = {
260                 .desc = {
261                         .name   = "db8500-vsmps2",
262                         .id     = DB8500_REGULATOR_VSMPS2,
263                         .ops    = &db8500_regulator_ops,
264                         .type   = REGULATOR_VOLTAGE,
265                         .owner  = THIS_MODULE,
266                         .fixed_uV = 1800000,
267                         .n_voltages = 1,
268                 },
269                 .exclude_from_power_state = true,
270         },
271         [DB8500_REGULATOR_VSMPS3] = {
272                 .desc = {
273                         .name   = "db8500-vsmps3",
274                         .id     = DB8500_REGULATOR_VSMPS3,
275                         .ops    = &db8500_regulator_ops,
276                         .type   = REGULATOR_VOLTAGE,
277                         .owner  = THIS_MODULE,
278                 },
279         },
280         [DB8500_REGULATOR_VRF1] = {
281                 .desc = {
282                         .name   = "db8500-vrf1",
283                         .id     = DB8500_REGULATOR_VRF1,
284                         .ops    = &db8500_regulator_ops,
285                         .type   = REGULATOR_VOLTAGE,
286                         .owner  = THIS_MODULE,
287                 },
288         },
289         [DB8500_REGULATOR_SWITCH_SVAMMDSP] = {
290                 .desc = {
291                         .name   = "db8500-sva-mmdsp",
292                         .id     = DB8500_REGULATOR_SWITCH_SVAMMDSP,
293                         .ops    = &db8500_regulator_switch_ops,
294                         .type   = REGULATOR_VOLTAGE,
295                         .owner  = THIS_MODULE,
296                 },
297                 .epod_id = EPOD_ID_SVAMMDSP,
298         },
299         [DB8500_REGULATOR_SWITCH_SVAMMDSPRET] = {
300                 .desc = {
301                         .name   = "db8500-sva-mmdsp-ret",
302                         .id     = DB8500_REGULATOR_SWITCH_SVAMMDSPRET,
303                         .ops    = &db8500_regulator_switch_ops,
304                         .type   = REGULATOR_VOLTAGE,
305                         .owner  = THIS_MODULE,
306                 },
307                 .epod_id = EPOD_ID_SVAMMDSP,
308                 .is_ramret = true,
309         },
310         [DB8500_REGULATOR_SWITCH_SVAPIPE] = {
311                 .desc = {
312                         .name   = "db8500-sva-pipe",
313                         .id     = DB8500_REGULATOR_SWITCH_SVAPIPE,
314                         .ops    = &db8500_regulator_switch_ops,
315                         .type   = REGULATOR_VOLTAGE,
316                         .owner  = THIS_MODULE,
317                 },
318                 .epod_id = EPOD_ID_SVAPIPE,
319         },
320         [DB8500_REGULATOR_SWITCH_SIAMMDSP] = {
321                 .desc = {
322                         .name   = "db8500-sia-mmdsp",
323                         .id     = DB8500_REGULATOR_SWITCH_SIAMMDSP,
324                         .ops    = &db8500_regulator_switch_ops,
325                         .type   = REGULATOR_VOLTAGE,
326                         .owner  = THIS_MODULE,
327                 },
328                 .epod_id = EPOD_ID_SIAMMDSP,
329         },
330         [DB8500_REGULATOR_SWITCH_SIAMMDSPRET] = {
331                 .desc = {
332                         .name   = "db8500-sia-mmdsp-ret",
333                         .id     = DB8500_REGULATOR_SWITCH_SIAMMDSPRET,
334                         .ops    = &db8500_regulator_switch_ops,
335                         .type   = REGULATOR_VOLTAGE,
336                         .owner  = THIS_MODULE,
337                 },
338                 .epod_id = EPOD_ID_SIAMMDSP,
339                 .is_ramret = true,
340         },
341         [DB8500_REGULATOR_SWITCH_SIAPIPE] = {
342                 .desc = {
343                         .name   = "db8500-sia-pipe",
344                         .id     = DB8500_REGULATOR_SWITCH_SIAPIPE,
345                         .ops    = &db8500_regulator_switch_ops,
346                         .type   = REGULATOR_VOLTAGE,
347                         .owner  = THIS_MODULE,
348                 },
349                 .epod_id = EPOD_ID_SIAPIPE,
350         },
351         [DB8500_REGULATOR_SWITCH_SGA] = {
352                 .desc = {
353                         .name   = "db8500-sga",
354                         .id     = DB8500_REGULATOR_SWITCH_SGA,
355                         .ops    = &db8500_regulator_switch_ops,
356                         .type   = REGULATOR_VOLTAGE,
357                         .owner  = THIS_MODULE,
358                 },
359                 .epod_id = EPOD_ID_SGA,
360         },
361         [DB8500_REGULATOR_SWITCH_B2R2_MCDE] = {
362                 .desc = {
363                         .name   = "db8500-b2r2-mcde",
364                         .id     = DB8500_REGULATOR_SWITCH_B2R2_MCDE,
365                         .ops    = &db8500_regulator_switch_ops,
366                         .type   = REGULATOR_VOLTAGE,
367                         .owner  = THIS_MODULE,
368                 },
369                 .epod_id = EPOD_ID_B2R2_MCDE,
370         },
371         [DB8500_REGULATOR_SWITCH_ESRAM12] = {
372                 .desc = {
373                         .name   = "db8500-esram12",
374                         .id     = DB8500_REGULATOR_SWITCH_ESRAM12,
375                         .ops    = &db8500_regulator_switch_ops,
376                         .type   = REGULATOR_VOLTAGE,
377                         .owner  = THIS_MODULE,
378                 },
379                 .epod_id        = EPOD_ID_ESRAM12,
380                 .is_enabled     = true,
381         },
382         [DB8500_REGULATOR_SWITCH_ESRAM12RET] = {
383                 .desc = {
384                         .name   = "db8500-esram12-ret",
385                         .id     = DB8500_REGULATOR_SWITCH_ESRAM12RET,
386                         .ops    = &db8500_regulator_switch_ops,
387                         .type   = REGULATOR_VOLTAGE,
388                         .owner  = THIS_MODULE,
389                 },
390                 .epod_id = EPOD_ID_ESRAM12,
391                 .is_ramret = true,
392         },
393         [DB8500_REGULATOR_SWITCH_ESRAM34] = {
394                 .desc = {
395                         .name   = "db8500-esram34",
396                         .id     = DB8500_REGULATOR_SWITCH_ESRAM34,
397                         .ops    = &db8500_regulator_switch_ops,
398                         .type   = REGULATOR_VOLTAGE,
399                         .owner  = THIS_MODULE,
400                 },
401                 .epod_id        = EPOD_ID_ESRAM34,
402                 .is_enabled     = true,
403         },
404         [DB8500_REGULATOR_SWITCH_ESRAM34RET] = {
405                 .desc = {
406                         .name   = "db8500-esram34-ret",
407                         .id     = DB8500_REGULATOR_SWITCH_ESRAM34RET,
408                         .ops    = &db8500_regulator_switch_ops,
409                         .type   = REGULATOR_VOLTAGE,
410                         .owner  = THIS_MODULE,
411                 },
412                 .epod_id = EPOD_ID_ESRAM34,
413                 .is_ramret = true,
414         },
415 };
416 
417 static int db8500_regulator_register(struct platform_device *pdev,
418                                         struct regulator_init_data *init_data,
419                                         int id,
420                                         struct device_node *np)
421 {
422         struct dbx500_regulator_info *info;
423         struct regulator_config config = { };
424         int err;
425 
426         /* assign per-regulator data */
427         info = &dbx500_regulator_info[id];
428         info->dev = &pdev->dev;
429 
430         config.dev = &pdev->dev;
431         config.init_data = init_data;
432         config.driver_data = info;
433         config.of_node = np;
434 
435         /* register with the regulator framework */
436         info->rdev = devm_regulator_register(&pdev->dev, &info->desc, &config);
437         if (IS_ERR(info->rdev)) {
438                 err = PTR_ERR(info->rdev);
439                 dev_err(&pdev->dev, "failed to register %s: err %i\n",
440                         info->desc.name, err);
441                 return err;
442         }
443 
444         dev_dbg(rdev_get_dev(info->rdev),
445                 "regulator-%s-probed\n", info->desc.name);
446 
447         return 0;
448 }
449 
450 static struct of_regulator_match db8500_regulator_matches[] = {
451         { .name = "db8500_vape",          .driver_data = (void *) DB8500_REGULATOR_VAPE, },
452         { .name = "db8500_varm",          .driver_data = (void *) DB8500_REGULATOR_VARM, },
453         { .name = "db8500_vmodem",        .driver_data = (void *) DB8500_REGULATOR_VMODEM, },
454         { .name = "db8500_vpll",          .driver_data = (void *) DB8500_REGULATOR_VPLL, },
455         { .name = "db8500_vsmps1",        .driver_data = (void *) DB8500_REGULATOR_VSMPS1, },
456         { .name = "db8500_vsmps2",        .driver_data = (void *) DB8500_REGULATOR_VSMPS2, },
457         { .name = "db8500_vsmps3",        .driver_data = (void *) DB8500_REGULATOR_VSMPS3, },
458         { .name = "db8500_vrf1",          .driver_data = (void *) DB8500_REGULATOR_VRF1, },
459         { .name = "db8500_sva_mmdsp",     .driver_data = (void *) DB8500_REGULATOR_SWITCH_SVAMMDSP, },
460         { .name = "db8500_sva_mmdsp_ret", .driver_data = (void *) DB8500_REGULATOR_SWITCH_SVAMMDSPRET, },
461         { .name = "db8500_sva_pipe",      .driver_data = (void *) DB8500_REGULATOR_SWITCH_SVAPIPE, },
462         { .name = "db8500_sia_mmdsp",     .driver_data = (void *) DB8500_REGULATOR_SWITCH_SIAMMDSP, },
463         { .name = "db8500_sia_mmdsp_ret", .driver_data = (void *) DB8500_REGULATOR_SWITCH_SIAMMDSPRET, },
464         { .name = "db8500_sia_pipe",      .driver_data = (void *) DB8500_REGULATOR_SWITCH_SIAPIPE, },
465         { .name = "db8500_sga",           .driver_data = (void *) DB8500_REGULATOR_SWITCH_SGA, },
466         { .name = "db8500_b2r2_mcde",     .driver_data = (void *) DB8500_REGULATOR_SWITCH_B2R2_MCDE, },
467         { .name = "db8500_esram12",       .driver_data = (void *) DB8500_REGULATOR_SWITCH_ESRAM12, },
468         { .name = "db8500_esram12_ret",   .driver_data = (void *) DB8500_REGULATOR_SWITCH_ESRAM12RET, },
469         { .name = "db8500_esram34",       .driver_data = (void *) DB8500_REGULATOR_SWITCH_ESRAM34, },
470         { .name = "db8500_esram34_ret",   .driver_data = (void *) DB8500_REGULATOR_SWITCH_ESRAM34RET, },
471 };
472 
473 static int
474 db8500_regulator_of_probe(struct platform_device *pdev,
475                         struct device_node *np)
476 {
477         int i, err;
478 
479         for (i = 0; i < ARRAY_SIZE(dbx500_regulator_info); i++) {
480                 err = db8500_regulator_register(
481                         pdev, db8500_regulator_matches[i].init_data,
482                         i, db8500_regulator_matches[i].of_node);
483                 if (err)
484                         return err;
485         }
486 
487         return 0;
488 }
489 
490 static int db8500_regulator_probe(struct platform_device *pdev)
491 {
492         struct regulator_init_data *db8500_init_data =
493                                         dev_get_platdata(&pdev->dev);
494         struct device_node *np = pdev->dev.of_node;
495         int i, err;
496 
497         /* register all regulators */
498         if (np) {
499                 err = of_regulator_match(&pdev->dev, np,
500                                         db8500_regulator_matches,
501                                         ARRAY_SIZE(db8500_regulator_matches));
502                 if (err < 0) {
503                         dev_err(&pdev->dev,
504                                 "Error parsing regulator init data: %d\n", err);
505                         return err;
506                 }
507 
508                 err = db8500_regulator_of_probe(pdev, np);
509                 if (err)
510                         return err;
511         } else {
512                 for (i = 0; i < ARRAY_SIZE(dbx500_regulator_info); i++) {
513                         err = db8500_regulator_register(pdev,
514                                                         &db8500_init_data[i],
515                                                         i, NULL);
516                         if (err)
517                                 return err;
518                 }
519         }
520 
521         err = ux500_regulator_debug_init(pdev,
522                                          dbx500_regulator_info,
523                                          ARRAY_SIZE(dbx500_regulator_info));
524         return 0;
525 }
526 
527 static int db8500_regulator_remove(struct platform_device *pdev)
528 {
529         ux500_regulator_debug_exit();
530 
531         return 0;
532 }
533 
534 static struct platform_driver db8500_regulator_driver = {
535         .driver = {
536                 .name = "db8500-prcmu-regulators",
537                 .owner = THIS_MODULE,
538         },
539         .probe = db8500_regulator_probe,
540         .remove = db8500_regulator_remove,
541 };
542 
543 static int __init db8500_regulator_init(void)
544 {
545         return platform_driver_register(&db8500_regulator_driver);
546 }
547 
548 static void __exit db8500_regulator_exit(void)
549 {
550         platform_driver_unregister(&db8500_regulator_driver);
551 }
552 
553 arch_initcall(db8500_regulator_init);
554 module_exit(db8500_regulator_exit);
555 
556 MODULE_AUTHOR("STMicroelectronics/ST-Ericsson");
557 MODULE_DESCRIPTION("DB8500 regulator driver");
558 MODULE_LICENSE("GPL v2");
559 

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