GNU Linux-libre 5.10.219-gnu1
[releases.git] / drivers / regulator / db8500-prcmu.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) ST-Ericsson SA 2010
4  *
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 const 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 = false;
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 const 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                         .of_match = of_match_ptr("db8500_vape"),
218                         .id     = DB8500_REGULATOR_VAPE,
219                         .ops    = &db8500_regulator_ops,
220                         .type   = REGULATOR_VOLTAGE,
221                         .owner  = THIS_MODULE,
222                 },
223         },
224         [DB8500_REGULATOR_VARM] = {
225                 .desc = {
226                         .name   = "db8500-varm",
227                         .of_match = of_match_ptr("db8500_varm"),
228                         .id     = DB8500_REGULATOR_VARM,
229                         .ops    = &db8500_regulator_ops,
230                         .type   = REGULATOR_VOLTAGE,
231                         .owner  = THIS_MODULE,
232                 },
233         },
234         [DB8500_REGULATOR_VMODEM] = {
235                 .desc = {
236                         .name   = "db8500-vmodem",
237                         .of_match = of_match_ptr("db8500_vmodem"),
238                         .id     = DB8500_REGULATOR_VMODEM,
239                         .ops    = &db8500_regulator_ops,
240                         .type   = REGULATOR_VOLTAGE,
241                         .owner  = THIS_MODULE,
242                 },
243         },
244         [DB8500_REGULATOR_VPLL] = {
245                 .desc = {
246                         .name   = "db8500-vpll",
247                         .of_match = of_match_ptr("db8500_vpll"),
248                         .id     = DB8500_REGULATOR_VPLL,
249                         .ops    = &db8500_regulator_ops,
250                         .type   = REGULATOR_VOLTAGE,
251                         .owner  = THIS_MODULE,
252                 },
253         },
254         [DB8500_REGULATOR_VSMPS1] = {
255                 .desc = {
256                         .name   = "db8500-vsmps1",
257                         .of_match = of_match_ptr("db8500_vsmps1"),
258                         .id     = DB8500_REGULATOR_VSMPS1,
259                         .ops    = &db8500_regulator_ops,
260                         .type   = REGULATOR_VOLTAGE,
261                         .owner  = THIS_MODULE,
262                 },
263         },
264         [DB8500_REGULATOR_VSMPS2] = {
265                 .desc = {
266                         .name   = "db8500-vsmps2",
267                         .of_match = of_match_ptr("db8500_vsmps2"),
268                         .id     = DB8500_REGULATOR_VSMPS2,
269                         .ops    = &db8500_regulator_ops,
270                         .type   = REGULATOR_VOLTAGE,
271                         .owner  = THIS_MODULE,
272                         .fixed_uV = 1800000,
273                         .n_voltages = 1,
274                 },
275                 .exclude_from_power_state = true,
276         },
277         [DB8500_REGULATOR_VSMPS3] = {
278                 .desc = {
279                         .name   = "db8500-vsmps3",
280                         .of_match = of_match_ptr("db8500_vsmps3"),
281                         .id     = DB8500_REGULATOR_VSMPS3,
282                         .ops    = &db8500_regulator_ops,
283                         .type   = REGULATOR_VOLTAGE,
284                         .owner  = THIS_MODULE,
285                 },
286         },
287         [DB8500_REGULATOR_VRF1] = {
288                 .desc = {
289                         .name   = "db8500-vrf1",
290                         .of_match = of_match_ptr("db8500_vrf1"),
291                         .id     = DB8500_REGULATOR_VRF1,
292                         .ops    = &db8500_regulator_ops,
293                         .type   = REGULATOR_VOLTAGE,
294                         .owner  = THIS_MODULE,
295                 },
296         },
297         [DB8500_REGULATOR_SWITCH_SVAMMDSP] = {
298                 .desc = {
299                         .name   = "db8500-sva-mmdsp",
300                         .of_match = of_match_ptr("db8500_sva_mmdsp"),
301                         .id     = DB8500_REGULATOR_SWITCH_SVAMMDSP,
302                         .ops    = &db8500_regulator_switch_ops,
303                         .type   = REGULATOR_VOLTAGE,
304                         .owner  = THIS_MODULE,
305                 },
306                 .epod_id = EPOD_ID_SVAMMDSP,
307         },
308         [DB8500_REGULATOR_SWITCH_SVAMMDSPRET] = {
309                 .desc = {
310                         .name   = "db8500-sva-mmdsp-ret",
311                         .of_match = of_match_ptr("db8500_sva_mmdsp_ret"),
312                         .id     = DB8500_REGULATOR_SWITCH_SVAMMDSPRET,
313                         .ops    = &db8500_regulator_switch_ops,
314                         .type   = REGULATOR_VOLTAGE,
315                         .owner  = THIS_MODULE,
316                 },
317                 .epod_id = EPOD_ID_SVAMMDSP,
318                 .is_ramret = true,
319         },
320         [DB8500_REGULATOR_SWITCH_SVAPIPE] = {
321                 .desc = {
322                         .name   = "db8500-sva-pipe",
323                         .of_match = of_match_ptr("db8500_sva_pipe"),
324                         .id     = DB8500_REGULATOR_SWITCH_SVAPIPE,
325                         .ops    = &db8500_regulator_switch_ops,
326                         .type   = REGULATOR_VOLTAGE,
327                         .owner  = THIS_MODULE,
328                 },
329                 .epod_id = EPOD_ID_SVAPIPE,
330         },
331         [DB8500_REGULATOR_SWITCH_SIAMMDSP] = {
332                 .desc = {
333                         .name   = "db8500-sia-mmdsp",
334                         .of_match = of_match_ptr("db8500_sia_mmdsp"),
335                         .id     = DB8500_REGULATOR_SWITCH_SIAMMDSP,
336                         .ops    = &db8500_regulator_switch_ops,
337                         .type   = REGULATOR_VOLTAGE,
338                         .owner  = THIS_MODULE,
339                 },
340                 .epod_id = EPOD_ID_SIAMMDSP,
341         },
342         [DB8500_REGULATOR_SWITCH_SIAMMDSPRET] = {
343                 .desc = {
344                         .name   = "db8500-sia-mmdsp-ret",
345                         .of_match = of_match_ptr("db8500_sia_mmdsp_ret"),
346                         .id     = DB8500_REGULATOR_SWITCH_SIAMMDSPRET,
347                         .ops    = &db8500_regulator_switch_ops,
348                         .type   = REGULATOR_VOLTAGE,
349                         .owner  = THIS_MODULE,
350                 },
351                 .epod_id = EPOD_ID_SIAMMDSP,
352                 .is_ramret = true,
353         },
354         [DB8500_REGULATOR_SWITCH_SIAPIPE] = {
355                 .desc = {
356                         .name   = "db8500-sia-pipe",
357                         .of_match = of_match_ptr("db8500_sia_pipe"),
358                         .id     = DB8500_REGULATOR_SWITCH_SIAPIPE,
359                         .ops    = &db8500_regulator_switch_ops,
360                         .type   = REGULATOR_VOLTAGE,
361                         .owner  = THIS_MODULE,
362                 },
363                 .epod_id = EPOD_ID_SIAPIPE,
364         },
365         [DB8500_REGULATOR_SWITCH_SGA] = {
366                 .desc = {
367                         .name   = "db8500-sga",
368                         .of_match = of_match_ptr("db8500_sga"),
369                         .id     = DB8500_REGULATOR_SWITCH_SGA,
370                         .ops    = &db8500_regulator_switch_ops,
371                         .type   = REGULATOR_VOLTAGE,
372                         .owner  = THIS_MODULE,
373                 },
374                 .epod_id = EPOD_ID_SGA,
375         },
376         [DB8500_REGULATOR_SWITCH_B2R2_MCDE] = {
377                 .desc = {
378                         .name   = "db8500-b2r2-mcde",
379                         .of_match = of_match_ptr("db8500_b2r2_mcde"),
380                         .id     = DB8500_REGULATOR_SWITCH_B2R2_MCDE,
381                         .ops    = &db8500_regulator_switch_ops,
382                         .type   = REGULATOR_VOLTAGE,
383                         .owner  = THIS_MODULE,
384                 },
385                 .epod_id = EPOD_ID_B2R2_MCDE,
386         },
387         [DB8500_REGULATOR_SWITCH_ESRAM12] = {
388                 .desc = {
389                         .name   = "db8500-esram12",
390                         .of_match = of_match_ptr("db8500_esram12"),
391                         .id     = DB8500_REGULATOR_SWITCH_ESRAM12,
392                         .ops    = &db8500_regulator_switch_ops,
393                         .type   = REGULATOR_VOLTAGE,
394                         .owner  = THIS_MODULE,
395                 },
396                 .epod_id        = EPOD_ID_ESRAM12,
397                 .is_enabled     = true,
398         },
399         [DB8500_REGULATOR_SWITCH_ESRAM12RET] = {
400                 .desc = {
401                         .name   = "db8500-esram12-ret",
402                         .of_match = of_match_ptr("db8500_esram12_ret"),
403                         .id     = DB8500_REGULATOR_SWITCH_ESRAM12RET,
404                         .ops    = &db8500_regulator_switch_ops,
405                         .type   = REGULATOR_VOLTAGE,
406                         .owner  = THIS_MODULE,
407                 },
408                 .epod_id = EPOD_ID_ESRAM12,
409                 .is_ramret = true,
410         },
411         [DB8500_REGULATOR_SWITCH_ESRAM34] = {
412                 .desc = {
413                         .name   = "db8500-esram34",
414                         .of_match = of_match_ptr("db8500_esram34"),
415                         .id     = DB8500_REGULATOR_SWITCH_ESRAM34,
416                         .ops    = &db8500_regulator_switch_ops,
417                         .type   = REGULATOR_VOLTAGE,
418                         .owner  = THIS_MODULE,
419                 },
420                 .epod_id        = EPOD_ID_ESRAM34,
421                 .is_enabled     = true,
422         },
423         [DB8500_REGULATOR_SWITCH_ESRAM34RET] = {
424                 .desc = {
425                         .name   = "db8500-esram34-ret",
426                         .of_match = of_match_ptr("db8500_esram34_ret"),
427                         .id     = DB8500_REGULATOR_SWITCH_ESRAM34RET,
428                         .ops    = &db8500_regulator_switch_ops,
429                         .type   = REGULATOR_VOLTAGE,
430                         .owner  = THIS_MODULE,
431                 },
432                 .epod_id = EPOD_ID_ESRAM34,
433                 .is_ramret = true,
434         },
435 };
436
437 static int db8500_regulator_probe(struct platform_device *pdev)
438 {
439         struct regulator_init_data *db8500_init_data;
440         struct dbx500_regulator_info *info;
441         struct regulator_config config = { };
442         struct regulator_dev *rdev;
443         int err, i;
444
445         db8500_init_data = dev_get_platdata(&pdev->dev);
446
447         for (i = 0; i < ARRAY_SIZE(dbx500_regulator_info); i++) {
448                 /* assign per-regulator data */
449                 info = &dbx500_regulator_info[i];
450
451                 config.driver_data = info;
452                 config.dev = &pdev->dev;
453                 if (db8500_init_data)
454                         config.init_data = &db8500_init_data[i];
455
456                 rdev = devm_regulator_register(&pdev->dev, &info->desc,
457                                                &config);
458                 if (IS_ERR(rdev)) {
459                         err = PTR_ERR(rdev);
460                         dev_err(&pdev->dev, "failed to register %s: err %i\n",
461                                 info->desc.name, err);
462                         return err;
463                 }
464                 dev_dbg(&pdev->dev, "regulator-%s-probed\n", info->desc.name);
465         }
466
467         ux500_regulator_debug_init(pdev, dbx500_regulator_info,
468                                    ARRAY_SIZE(dbx500_regulator_info));
469         return 0;
470 }
471
472 static int db8500_regulator_remove(struct platform_device *pdev)
473 {
474         ux500_regulator_debug_exit();
475
476         return 0;
477 }
478
479 static struct platform_driver db8500_regulator_driver = {
480         .driver = {
481                 .name = "db8500-prcmu-regulators",
482         },
483         .probe = db8500_regulator_probe,
484         .remove = db8500_regulator_remove,
485 };
486
487 static int __init db8500_regulator_init(void)
488 {
489         return platform_driver_register(&db8500_regulator_driver);
490 }
491
492 static void __exit db8500_regulator_exit(void)
493 {
494         platform_driver_unregister(&db8500_regulator_driver);
495 }
496
497 arch_initcall(db8500_regulator_init);
498 module_exit(db8500_regulator_exit);
499
500 MODULE_AUTHOR("STMicroelectronics/ST-Ericsson");
501 MODULE_DESCRIPTION("DB8500 regulator driver");
502 MODULE_LICENSE("GPL v2");