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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/db8500-prcmu.h>
17#include <linux/regulator/driver.h>
18#include <linux/regulator/machine.h>
19#include <linux/regulator/db8500-prcmu.h>
20
21/*
22 * power state reference count
23 */
24static int power_state_active_cnt; /* will initialize to zero */
25static DEFINE_SPINLOCK(power_state_active_lock);
26
27static void power_state_active_enable(void)
28{
29 unsigned long flags;
30
31 spin_lock_irqsave(&power_state_active_lock, flags);
32 power_state_active_cnt++;
33 spin_unlock_irqrestore(&power_state_active_lock, flags);
34}
35
36static int power_state_active_disable(void)
37{
38 int ret = 0;
39 unsigned long flags;
40
41 spin_lock_irqsave(&power_state_active_lock, flags);
42 if (power_state_active_cnt <= 0) {
43 pr_err("power state: unbalanced enable/disable calls\n");
44 ret = -EINVAL;
45 goto out;
46 }
47
48 power_state_active_cnt--;
49out:
50 spin_unlock_irqrestore(&power_state_active_lock, flags);
51 return ret;
52}
53
54/*
55 * Exported interface for CPUIdle only. This function is called when interrupts
56 * are turned off. Hence, no locking.
57 */
58int power_state_active_is_enabled(void)
59{
60 return (power_state_active_cnt > 0);
61}
62
63/**
64 * struct db8500_regulator_info - db8500 regulator information
65 * @dev: device pointer
66 * @desc: regulator description
67 * @rdev: regulator device pointer
68 * @is_enabled: status of the regulator
69 * @epod_id: id for EPOD (power domain)
70 * @is_ramret: RAM retention switch for EPOD (power domain)
71 * @operating_point: operating point (only for vape, to be removed)
72 *
73 */
74struct db8500_regulator_info {
75 struct device *dev;
76 struct regulator_desc desc;
77 struct regulator_dev *rdev;
78 bool is_enabled;
79 u16 epod_id;
80 bool is_ramret;
81 bool exclude_from_power_state;
82 unsigned int operating_point;
83};
84
85static int db8500_regulator_enable(struct regulator_dev *rdev)
86{
87 struct db8500_regulator_info *info = rdev_get_drvdata(rdev);
88
89 if (info == NULL)
90 return -EINVAL;
91
92 dev_vdbg(rdev_get_dev(rdev), "regulator-%s-enable\n",
93 info->desc.name);
94
95 info->is_enabled = true;
96 if (!info->exclude_from_power_state)
97 power_state_active_enable();
98
99 return 0;
100}
101
102static int db8500_regulator_disable(struct regulator_dev *rdev)
103{
104 struct db8500_regulator_info *info = rdev_get_drvdata(rdev);
105 int ret = 0;
106
107 if (info == NULL)
108 return -EINVAL;
109
110 dev_vdbg(rdev_get_dev(rdev), "regulator-%s-disable\n",
111 info->desc.name);
112
113 info->is_enabled = false;
114 if (!info->exclude_from_power_state)
115 ret = power_state_active_disable();
116
117 return ret;
118}
119
120static int db8500_regulator_is_enabled(struct regulator_dev *rdev)
121{
122 struct db8500_regulator_info *info = rdev_get_drvdata(rdev);
123
124 if (info == NULL)
125 return -EINVAL;
126
127 dev_vdbg(rdev_get_dev(rdev), "regulator-%s-is_enabled (is_enabled):"
128 " %i\n", info->desc.name, info->is_enabled);
129
130 return info->is_enabled;
131}
132
133/* db8500 regulator operations */
134static struct regulator_ops db8500_regulator_ops = {
135 .enable = db8500_regulator_enable,
136 .disable = db8500_regulator_disable,
137 .is_enabled = db8500_regulator_is_enabled,
138};
139
140/*
141 * EPOD control
142 */
143static bool epod_on[NUM_EPOD_ID];
144static bool epod_ramret[NUM_EPOD_ID];
145
146static int enable_epod(u16 epod_id, bool ramret)
147{
148 int ret;
149
150 if (ramret) {
151 if (!epod_on[epod_id]) {
152 ret = prcmu_set_epod(epod_id, EPOD_STATE_RAMRET);
153 if (ret < 0)
154 return ret;
155 }
156 epod_ramret[epod_id] = true;
157 } else {
158 ret = prcmu_set_epod(epod_id, EPOD_STATE_ON);
159 if (ret < 0)
160 return ret;
161 epod_on[epod_id] = true;
162 }
163
164 return 0;
165}
166
167static int disable_epod(u16 epod_id, bool ramret)
168{
169 int ret;
170
171 if (ramret) {
172 if (!epod_on[epod_id]) {
173 ret = prcmu_set_epod(epod_id, EPOD_STATE_OFF);
174 if (ret < 0)
175 return ret;
176 }
177 epod_ramret[epod_id] = false;
178 } else {
179 if (epod_ramret[epod_id]) {
180 ret = prcmu_set_epod(epod_id, EPOD_STATE_RAMRET);
181 if (ret < 0)
182 return ret;
183 } else {
184 ret = prcmu_set_epod(epod_id, EPOD_STATE_OFF);
185 if (ret < 0)
186 return ret;
187 }
188 epod_on[epod_id] = false;
189 }
190
191 return 0;
192}
193
194/*
195 * Regulator switch
196 */
197static int db8500_regulator_switch_enable(struct regulator_dev *rdev)
198{
199 struct db8500_regulator_info *info = rdev_get_drvdata(rdev);
200 int ret;
201
202 if (info == NULL)
203 return -EINVAL;
204
205 dev_vdbg(rdev_get_dev(rdev), "regulator-switch-%s-enable\n",
206 info->desc.name);
207
208 ret = enable_epod(info->epod_id, info->is_ramret);
209 if (ret < 0) {
210 dev_err(rdev_get_dev(rdev),
211 "regulator-switch-%s-enable: prcmu call failed\n",
212 info->desc.name);
213 goto out;
214 }
215
216 info->is_enabled = true;
217out:
218 return ret;
219}
220
221static int db8500_regulator_switch_disable(struct regulator_dev *rdev)
222{
223 struct db8500_regulator_info *info = rdev_get_drvdata(rdev);
224 int ret;
225
226 if (info == NULL)
227 return -EINVAL;
228
229 dev_vdbg(rdev_get_dev(rdev), "regulator-switch-%s-disable\n",
230 info->desc.name);
231
232 ret = disable_epod(info->epod_id, info->is_ramret);
233 if (ret < 0) {
234 dev_err(rdev_get_dev(rdev),
235 "regulator_switch-%s-disable: prcmu call failed\n",
236 info->desc.name);
237 goto out;
238 }
239
240 info->is_enabled = 0;
241out:
242 return ret;
243}
244
245static int db8500_regulator_switch_is_enabled(struct regulator_dev *rdev)
246{
247 struct db8500_regulator_info *info = rdev_get_drvdata(rdev);
248
249 if (info == NULL)
250 return -EINVAL;
251
252 dev_vdbg(rdev_get_dev(rdev),
253 "regulator-switch-%s-is_enabled (is_enabled): %i\n",
254 info->desc.name, info->is_enabled);
255
256 return info->is_enabled;
257}
258
259static struct regulator_ops db8500_regulator_switch_ops = {
260 .enable = db8500_regulator_switch_enable,
261 .disable = db8500_regulator_switch_disable,
262 .is_enabled = db8500_regulator_switch_is_enabled,
263};
264
265/*
266 * Regulator information
267 */
268static struct db8500_regulator_info
269db8500_regulator_info[DB8500_NUM_REGULATORS] = {
270 [DB8500_REGULATOR_VAPE] = {
271 .desc = {
272 .name = "db8500-vape",
273 .id = DB8500_REGULATOR_VAPE,
274 .ops = &db8500_regulator_ops,
275 .type = REGULATOR_VOLTAGE,
276 .owner = THIS_MODULE,
277 },
278 },
279 [DB8500_REGULATOR_VARM] = {
280 .desc = {
281 .name = "db8500-varm",
282 .id = DB8500_REGULATOR_VARM,
283 .ops = &db8500_regulator_ops,
284 .type = REGULATOR_VOLTAGE,
285 .owner = THIS_MODULE,
286 },
287 },
288 [DB8500_REGULATOR_VMODEM] = {
289 .desc = {
290 .name = "db8500-vmodem",
291 .id = DB8500_REGULATOR_VMODEM,
292 .ops = &db8500_regulator_ops,
293 .type = REGULATOR_VOLTAGE,
294 .owner = THIS_MODULE,
295 },
296 },
297 [DB8500_REGULATOR_VPLL] = {
298 .desc = {
299 .name = "db8500-vpll",
300 .id = DB8500_REGULATOR_VPLL,
301 .ops = &db8500_regulator_ops,
302 .type = REGULATOR_VOLTAGE,
303 .owner = THIS_MODULE,
304 },
305 },
306 [DB8500_REGULATOR_VSMPS1] = {
307 .desc = {
308 .name = "db8500-vsmps1",
309 .id = DB8500_REGULATOR_VSMPS1,
310 .ops = &db8500_regulator_ops,
311 .type = REGULATOR_VOLTAGE,
312 .owner = THIS_MODULE,
313 },
314 },
315 [DB8500_REGULATOR_VSMPS2] = {
316 .desc = {
317 .name = "db8500-vsmps2",
318 .id = DB8500_REGULATOR_VSMPS2,
319 .ops = &db8500_regulator_ops,
320 .type = REGULATOR_VOLTAGE,
321 .owner = THIS_MODULE,
322 },
323 .exclude_from_power_state = true,
324 },
325 [DB8500_REGULATOR_VSMPS3] = {
326 .desc = {
327 .name = "db8500-vsmps3",
328 .id = DB8500_REGULATOR_VSMPS3,
329 .ops = &db8500_regulator_ops,
330 .type = REGULATOR_VOLTAGE,
331 .owner = THIS_MODULE,
332 },
333 },
334 [DB8500_REGULATOR_VRF1] = {
335 .desc = {
336 .name = "db8500-vrf1",
337 .id = DB8500_REGULATOR_VRF1,
338 .ops = &db8500_regulator_ops,
339 .type = REGULATOR_VOLTAGE,
340 .owner = THIS_MODULE,
341 },
342 },
343 [DB8500_REGULATOR_SWITCH_SVAMMDSP] = {
344 .desc = {
345 .name = "db8500-sva-mmdsp",
346 .id = DB8500_REGULATOR_SWITCH_SVAMMDSP,
347 .ops = &db8500_regulator_switch_ops,
348 .type = REGULATOR_VOLTAGE,
349 .owner = THIS_MODULE,
350 },
351 .epod_id = EPOD_ID_SVAMMDSP,
352 },
353 [DB8500_REGULATOR_SWITCH_SVAMMDSPRET] = {
354 .desc = {
355 .name = "db8500-sva-mmdsp-ret",
356 .id = DB8500_REGULATOR_SWITCH_SVAMMDSPRET,
357 .ops = &db8500_regulator_switch_ops,
358 .type = REGULATOR_VOLTAGE,
359 .owner = THIS_MODULE,
360 },
361 .epod_id = EPOD_ID_SVAMMDSP,
362 .is_ramret = true,
363 },
364 [DB8500_REGULATOR_SWITCH_SVAPIPE] = {
365 .desc = {
366 .name = "db8500-sva-pipe",
367 .id = DB8500_REGULATOR_SWITCH_SVAPIPE,
368 .ops = &db8500_regulator_switch_ops,
369 .type = REGULATOR_VOLTAGE,
370 .owner = THIS_MODULE,
371 },
372 .epod_id = EPOD_ID_SVAPIPE,
373 },
374 [DB8500_REGULATOR_SWITCH_SIAMMDSP] = {
375 .desc = {
376 .name = "db8500-sia-mmdsp",
377 .id = DB8500_REGULATOR_SWITCH_SIAMMDSP,
378 .ops = &db8500_regulator_switch_ops,
379 .type = REGULATOR_VOLTAGE,
380 .owner = THIS_MODULE,
381 },
382 .epod_id = EPOD_ID_SIAMMDSP,
383 },
384 [DB8500_REGULATOR_SWITCH_SIAMMDSPRET] = {
385 .desc = {
386 .name = "db8500-sia-mmdsp-ret",
387 .id = DB8500_REGULATOR_SWITCH_SIAMMDSPRET,
388 .ops = &db8500_regulator_switch_ops,
389 .type = REGULATOR_VOLTAGE,
390 .owner = THIS_MODULE,
391 },
392 .epod_id = EPOD_ID_SIAMMDSP,
393 .is_ramret = true,
394 },
395 [DB8500_REGULATOR_SWITCH_SIAPIPE] = {
396 .desc = {
397 .name = "db8500-sia-pipe",
398 .id = DB8500_REGULATOR_SWITCH_SIAPIPE,
399 .ops = &db8500_regulator_switch_ops,
400 .type = REGULATOR_VOLTAGE,
401 .owner = THIS_MODULE,
402 },
403 .epod_id = EPOD_ID_SIAPIPE,
404 },
405 [DB8500_REGULATOR_SWITCH_SGA] = {
406 .desc = {
407 .name = "db8500-sga",
408 .id = DB8500_REGULATOR_SWITCH_SGA,
409 .ops = &db8500_regulator_switch_ops,
410 .type = REGULATOR_VOLTAGE,
411 .owner = THIS_MODULE,
412 },
413 .epod_id = EPOD_ID_SGA,
414 },
415 [DB8500_REGULATOR_SWITCH_B2R2_MCDE] = {
416 .desc = {
417 .name = "db8500-b2r2-mcde",
418 .id = DB8500_REGULATOR_SWITCH_B2R2_MCDE,
419 .ops = &db8500_regulator_switch_ops,
420 .type = REGULATOR_VOLTAGE,
421 .owner = THIS_MODULE,
422 },
423 .epod_id = EPOD_ID_B2R2_MCDE,
424 },
425 [DB8500_REGULATOR_SWITCH_ESRAM12] = {
426 .desc = {
427 .name = "db8500-esram12",
428 .id = DB8500_REGULATOR_SWITCH_ESRAM12,
429 .ops = &db8500_regulator_switch_ops,
430 .type = REGULATOR_VOLTAGE,
431 .owner = THIS_MODULE,
432 },
433 .epod_id = EPOD_ID_ESRAM12,
434 .is_enabled = true,
435 },
436 [DB8500_REGULATOR_SWITCH_ESRAM12RET] = {
437 .desc = {
438 .name = "db8500-esram12-ret",
439 .id = DB8500_REGULATOR_SWITCH_ESRAM12RET,
440 .ops = &db8500_regulator_switch_ops,
441 .type = REGULATOR_VOLTAGE,
442 .owner = THIS_MODULE,
443 },
444 .epod_id = EPOD_ID_ESRAM12,
445 .is_ramret = true,
446 },
447 [DB8500_REGULATOR_SWITCH_ESRAM34] = {
448 .desc = {
449 .name = "db8500-esram34",
450 .id = DB8500_REGULATOR_SWITCH_ESRAM34,
451 .ops = &db8500_regulator_switch_ops,
452 .type = REGULATOR_VOLTAGE,
453 .owner = THIS_MODULE,
454 },
455 .epod_id = EPOD_ID_ESRAM34,
456 .is_enabled = true,
457 },
458 [DB8500_REGULATOR_SWITCH_ESRAM34RET] = {
459 .desc = {
460 .name = "db8500-esram34-ret",
461 .id = DB8500_REGULATOR_SWITCH_ESRAM34RET,
462 .ops = &db8500_regulator_switch_ops,
463 .type = REGULATOR_VOLTAGE,
464 .owner = THIS_MODULE,
465 },
466 .epod_id = EPOD_ID_ESRAM34,
467 .is_ramret = true,
468 },
469};
470
471static int __devinit db8500_regulator_probe(struct platform_device *pdev)
472{
473 struct regulator_init_data *db8500_init_data =
474 dev_get_platdata(&pdev->dev);
475 int i, err;
476
477 /* register all regulators */
478 for (i = 0; i < ARRAY_SIZE(db8500_regulator_info); i++) {
479 struct db8500_regulator_info *info;
480 struct regulator_init_data *init_data = &db8500_init_data[i];
481
482 /* assign per-regulator data */
483 info = &db8500_regulator_info[i];
484 info->dev = &pdev->dev;
485
486 /* register with the regulator framework */
487 info->rdev = regulator_register(&info->desc, &pdev->dev,
488 init_data, info);
489 if (IS_ERR(info->rdev)) {
490 err = PTR_ERR(info->rdev);
491 dev_err(&pdev->dev, "failed to register %s: err %i\n",
492 info->desc.name, err);
493
494 /* if failing, unregister all earlier regulators */
495 while (--i >= 0) {
496 info = &db8500_regulator_info[i];
497 regulator_unregister(info->rdev);
498 }
499 return err;
500 }
501
502 dev_dbg(rdev_get_dev(info->rdev),
503 "regulator-%s-probed\n", info->desc.name);
504 }
505
506 return 0;
507}
508
509static int __exit db8500_regulator_remove(struct platform_device *pdev)
510{
511 int i;
512
513 for (i = 0; i < ARRAY_SIZE(db8500_regulator_info); i++) {
514 struct db8500_regulator_info *info;
515 info = &db8500_regulator_info[i];
516
517 dev_vdbg(rdev_get_dev(info->rdev),
518 "regulator-%s-remove\n", info->desc.name);
519
520 regulator_unregister(info->rdev);
521 }
522
523 return 0;
524}
525
526static struct platform_driver db8500_regulator_driver = {
527 .driver = {
528 .name = "db8500-prcmu-regulators",
529 .owner = THIS_MODULE,
530 },
531 .probe = db8500_regulator_probe,
532 .remove = __exit_p(db8500_regulator_remove),
533};
534
535static int __init db8500_regulator_init(void)
536{
537 return platform_driver_register(&db8500_regulator_driver);
538}
539
540static void __exit db8500_regulator_exit(void)
541{
542 platform_driver_unregister(&db8500_regulator_driver);
543}
544
545arch_initcall(db8500_regulator_init);
546module_exit(db8500_regulator_exit);
547
548MODULE_AUTHOR("STMicroelectronics/ST-Ericsson");
549MODULE_DESCRIPTION("DB8500 regulator driver");
550MODULE_LICENSE("GPL v2");
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
25static 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
44static 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
64static 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 */
78static 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 */
87static bool epod_on[NUM_EPOD_ID];
88static bool epod_ramret[NUM_EPOD_ID];
89
90static 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
111static 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 */
141static 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;
161out:
162 return ret;
163}
164
165static 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;
185out:
186 return ret;
187}
188
189static 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
203static 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 */
212static struct dbx500_regulator_info
213dbx500_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 },
267 .exclude_from_power_state = true,
268 },
269 [DB8500_REGULATOR_VSMPS3] = {
270 .desc = {
271 .name = "db8500-vsmps3",
272 .id = DB8500_REGULATOR_VSMPS3,
273 .ops = &db8500_regulator_ops,
274 .type = REGULATOR_VOLTAGE,
275 .owner = THIS_MODULE,
276 },
277 },
278 [DB8500_REGULATOR_VRF1] = {
279 .desc = {
280 .name = "db8500-vrf1",
281 .id = DB8500_REGULATOR_VRF1,
282 .ops = &db8500_regulator_ops,
283 .type = REGULATOR_VOLTAGE,
284 .owner = THIS_MODULE,
285 },
286 },
287 [DB8500_REGULATOR_SWITCH_SVAMMDSP] = {
288 .desc = {
289 .name = "db8500-sva-mmdsp",
290 .id = DB8500_REGULATOR_SWITCH_SVAMMDSP,
291 .ops = &db8500_regulator_switch_ops,
292 .type = REGULATOR_VOLTAGE,
293 .owner = THIS_MODULE,
294 },
295 .epod_id = EPOD_ID_SVAMMDSP,
296 },
297 [DB8500_REGULATOR_SWITCH_SVAMMDSPRET] = {
298 .desc = {
299 .name = "db8500-sva-mmdsp-ret",
300 .id = DB8500_REGULATOR_SWITCH_SVAMMDSPRET,
301 .ops = &db8500_regulator_switch_ops,
302 .type = REGULATOR_VOLTAGE,
303 .owner = THIS_MODULE,
304 },
305 .epod_id = EPOD_ID_SVAMMDSP,
306 .is_ramret = true,
307 },
308 [DB8500_REGULATOR_SWITCH_SVAPIPE] = {
309 .desc = {
310 .name = "db8500-sva-pipe",
311 .id = DB8500_REGULATOR_SWITCH_SVAPIPE,
312 .ops = &db8500_regulator_switch_ops,
313 .type = REGULATOR_VOLTAGE,
314 .owner = THIS_MODULE,
315 },
316 .epod_id = EPOD_ID_SVAPIPE,
317 },
318 [DB8500_REGULATOR_SWITCH_SIAMMDSP] = {
319 .desc = {
320 .name = "db8500-sia-mmdsp",
321 .id = DB8500_REGULATOR_SWITCH_SIAMMDSP,
322 .ops = &db8500_regulator_switch_ops,
323 .type = REGULATOR_VOLTAGE,
324 .owner = THIS_MODULE,
325 },
326 .epod_id = EPOD_ID_SIAMMDSP,
327 },
328 [DB8500_REGULATOR_SWITCH_SIAMMDSPRET] = {
329 .desc = {
330 .name = "db8500-sia-mmdsp-ret",
331 .id = DB8500_REGULATOR_SWITCH_SIAMMDSPRET,
332 .ops = &db8500_regulator_switch_ops,
333 .type = REGULATOR_VOLTAGE,
334 .owner = THIS_MODULE,
335 },
336 .epod_id = EPOD_ID_SIAMMDSP,
337 .is_ramret = true,
338 },
339 [DB8500_REGULATOR_SWITCH_SIAPIPE] = {
340 .desc = {
341 .name = "db8500-sia-pipe",
342 .id = DB8500_REGULATOR_SWITCH_SIAPIPE,
343 .ops = &db8500_regulator_switch_ops,
344 .type = REGULATOR_VOLTAGE,
345 .owner = THIS_MODULE,
346 },
347 .epod_id = EPOD_ID_SIAPIPE,
348 },
349 [DB8500_REGULATOR_SWITCH_SGA] = {
350 .desc = {
351 .name = "db8500-sga",
352 .id = DB8500_REGULATOR_SWITCH_SGA,
353 .ops = &db8500_regulator_switch_ops,
354 .type = REGULATOR_VOLTAGE,
355 .owner = THIS_MODULE,
356 },
357 .epod_id = EPOD_ID_SGA,
358 },
359 [DB8500_REGULATOR_SWITCH_B2R2_MCDE] = {
360 .desc = {
361 .name = "db8500-b2r2-mcde",
362 .id = DB8500_REGULATOR_SWITCH_B2R2_MCDE,
363 .ops = &db8500_regulator_switch_ops,
364 .type = REGULATOR_VOLTAGE,
365 .owner = THIS_MODULE,
366 },
367 .epod_id = EPOD_ID_B2R2_MCDE,
368 },
369 [DB8500_REGULATOR_SWITCH_ESRAM12] = {
370 .desc = {
371 .name = "db8500-esram12",
372 .id = DB8500_REGULATOR_SWITCH_ESRAM12,
373 .ops = &db8500_regulator_switch_ops,
374 .type = REGULATOR_VOLTAGE,
375 .owner = THIS_MODULE,
376 },
377 .epod_id = EPOD_ID_ESRAM12,
378 .is_enabled = true,
379 },
380 [DB8500_REGULATOR_SWITCH_ESRAM12RET] = {
381 .desc = {
382 .name = "db8500-esram12-ret",
383 .id = DB8500_REGULATOR_SWITCH_ESRAM12RET,
384 .ops = &db8500_regulator_switch_ops,
385 .type = REGULATOR_VOLTAGE,
386 .owner = THIS_MODULE,
387 },
388 .epod_id = EPOD_ID_ESRAM12,
389 .is_ramret = true,
390 },
391 [DB8500_REGULATOR_SWITCH_ESRAM34] = {
392 .desc = {
393 .name = "db8500-esram34",
394 .id = DB8500_REGULATOR_SWITCH_ESRAM34,
395 .ops = &db8500_regulator_switch_ops,
396 .type = REGULATOR_VOLTAGE,
397 .owner = THIS_MODULE,
398 },
399 .epod_id = EPOD_ID_ESRAM34,
400 .is_enabled = true,
401 },
402 [DB8500_REGULATOR_SWITCH_ESRAM34RET] = {
403 .desc = {
404 .name = "db8500-esram34-ret",
405 .id = DB8500_REGULATOR_SWITCH_ESRAM34RET,
406 .ops = &db8500_regulator_switch_ops,
407 .type = REGULATOR_VOLTAGE,
408 .owner = THIS_MODULE,
409 },
410 .epod_id = EPOD_ID_ESRAM34,
411 .is_ramret = true,
412 },
413};
414
415static __devinit int db8500_regulator_register(struct platform_device *pdev,
416 struct regulator_init_data *init_data,
417 int id,
418 struct device_node *np)
419{
420 struct dbx500_regulator_info *info;
421 struct regulator_config config = { };
422 int err;
423
424 /* assign per-regulator data */
425 info = &dbx500_regulator_info[id];
426 info->dev = &pdev->dev;
427
428 config.dev = &pdev->dev;
429 config.init_data = init_data;
430 config.driver_data = info;
431 config.of_node = np;
432
433 /* register with the regulator framework */
434 info->rdev = regulator_register(&info->desc, &config);
435 if (IS_ERR(info->rdev)) {
436 err = PTR_ERR(info->rdev);
437 dev_err(&pdev->dev, "failed to register %s: err %i\n",
438 info->desc.name, err);
439
440 /* if failing, unregister all earlier regulators */
441 while (--id >= 0) {
442 info = &dbx500_regulator_info[id];
443 regulator_unregister(info->rdev);
444 }
445 return err;
446 }
447
448 dev_dbg(rdev_get_dev(info->rdev),
449 "regulator-%s-probed\n", info->desc.name);
450
451 return 0;
452}
453
454static struct of_regulator_match db8500_regulator_matches[] = {
455 { .name = "db8500_vape", .driver_data = (void *) DB8500_REGULATOR_VAPE, },
456 { .name = "db8500_varm", .driver_data = (void *) DB8500_REGULATOR_VARM, },
457 { .name = "db8500_vmodem", .driver_data = (void *) DB8500_REGULATOR_VMODEM, },
458 { .name = "db8500_vpll", .driver_data = (void *) DB8500_REGULATOR_VPLL, },
459 { .name = "db8500_vsmps1", .driver_data = (void *) DB8500_REGULATOR_VSMPS1, },
460 { .name = "db8500_vsmps2", .driver_data = (void *) DB8500_REGULATOR_VSMPS2, },
461 { .name = "db8500_vsmps3", .driver_data = (void *) DB8500_REGULATOR_VSMPS3, },
462 { .name = "db8500_vrf1", .driver_data = (void *) DB8500_REGULATOR_VRF1, },
463 { .name = "db8500_sva_mmdsp", .driver_data = (void *) DB8500_REGULATOR_SWITCH_SVAMMDSP, },
464 { .name = "db8500_sva_mmdsp_ret", .driver_data = (void *) DB8500_REGULATOR_SWITCH_SVAMMDSPRET, },
465 { .name = "db8500_sva_pipe", .driver_data = (void *) DB8500_REGULATOR_SWITCH_SVAPIPE, },
466 { .name = "db8500_sia_mmdsp", .driver_data = (void *) DB8500_REGULATOR_SWITCH_SIAMMDSP, },
467 { .name = "db8500_sia_mmdsp_ret", .driver_data = (void *) DB8500_REGULATOR_SWITCH_SIAMMDSPRET, },
468 { .name = "db8500_sia_pipe", .driver_data = (void *) DB8500_REGULATOR_SWITCH_SIAPIPE, },
469 { .name = "db8500_sga", .driver_data = (void *) DB8500_REGULATOR_SWITCH_SGA, },
470 { .name = "db8500_b2r2_mcde", .driver_data = (void *) DB8500_REGULATOR_SWITCH_B2R2_MCDE, },
471 { .name = "db8500_esram12", .driver_data = (void *) DB8500_REGULATOR_SWITCH_ESRAM12, },
472 { .name = "db8500_esram12_ret", .driver_data = (void *) DB8500_REGULATOR_SWITCH_ESRAM12RET, },
473 { .name = "db8500_esram34", .driver_data = (void *) DB8500_REGULATOR_SWITCH_ESRAM34, },
474 { .name = "db8500_esram34_ret", .driver_data = (void *) DB8500_REGULATOR_SWITCH_ESRAM34RET, },
475};
476
477static __devinit int
478db8500_regulator_of_probe(struct platform_device *pdev,
479 struct device_node *np)
480{
481 int i, err;
482
483 for (i = 0; i < ARRAY_SIZE(dbx500_regulator_info); i++) {
484 err = db8500_regulator_register(
485 pdev, db8500_regulator_matches[i].init_data,
486 i, db8500_regulator_matches[i].of_node);
487 if (err)
488 return err;
489 }
490
491 return 0;
492}
493
494static int __devinit db8500_regulator_probe(struct platform_device *pdev)
495{
496 struct regulator_init_data *db8500_init_data =
497 dev_get_platdata(&pdev->dev);
498 struct device_node *np = pdev->dev.of_node;
499 int i, err;
500
501 /* register all regulators */
502 if (np) {
503 err = of_regulator_match(&pdev->dev, np,
504 db8500_regulator_matches,
505 ARRAY_SIZE(db8500_regulator_matches));
506 if (err < 0) {
507 dev_err(&pdev->dev,
508 "Error parsing regulator init data: %d\n", err);
509 return err;
510 }
511
512 err = db8500_regulator_of_probe(pdev, np);
513 if (err)
514 return err;
515 } else {
516 for (i = 0; i < ARRAY_SIZE(dbx500_regulator_info); i++) {
517 err = db8500_regulator_register(pdev,
518 &db8500_init_data[i],
519 i, NULL);
520 if (err)
521 return err;
522 }
523 }
524
525 err = ux500_regulator_debug_init(pdev,
526 dbx500_regulator_info,
527 ARRAY_SIZE(dbx500_regulator_info));
528 return 0;
529}
530
531static int __exit db8500_regulator_remove(struct platform_device *pdev)
532{
533 int i;
534
535 ux500_regulator_debug_exit();
536
537 for (i = 0; i < ARRAY_SIZE(dbx500_regulator_info); i++) {
538 struct dbx500_regulator_info *info;
539 info = &dbx500_regulator_info[i];
540
541 dev_vdbg(rdev_get_dev(info->rdev),
542 "regulator-%s-remove\n", info->desc.name);
543
544 regulator_unregister(info->rdev);
545 }
546
547 return 0;
548}
549
550static const struct of_device_id db8500_prcmu_regulator_match[] = {
551 { .compatible = "stericsson,db8500-prcmu-regulator", },
552 {}
553};
554
555static struct platform_driver db8500_regulator_driver = {
556 .driver = {
557 .name = "db8500-prcmu-regulators",
558 .owner = THIS_MODULE,
559 .of_match_table = db8500_prcmu_regulator_match,
560 },
561 .probe = db8500_regulator_probe,
562 .remove = __exit_p(db8500_regulator_remove),
563};
564
565static int __init db8500_regulator_init(void)
566{
567 return platform_driver_register(&db8500_regulator_driver);
568}
569
570static void __exit db8500_regulator_exit(void)
571{
572 platform_driver_unregister(&db8500_regulator_driver);
573}
574
575arch_initcall(db8500_regulator_init);
576module_exit(db8500_regulator_exit);
577
578MODULE_AUTHOR("STMicroelectronics/ST-Ericsson");
579MODULE_DESCRIPTION("DB8500 regulator driver");
580MODULE_LICENSE("GPL v2");