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(epod_id: info->epod_id, ramret: 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(epod_id: info->epod_id, ramret: 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(dev: &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(dev: &pdev->dev, regulator_desc: &info->desc, |
457 | config: &config); |
458 | if (IS_ERR(ptr: rdev)) { |
459 | err = PTR_ERR(ptr: 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, regulator_info: 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 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
483 | }, |
484 | .probe = db8500_regulator_probe, |
485 | .remove = db8500_regulator_remove, |
486 | }; |
487 | |
488 | static int __init db8500_regulator_init(void) |
489 | { |
490 | return platform_driver_register(&db8500_regulator_driver); |
491 | } |
492 | |
493 | static void __exit db8500_regulator_exit(void) |
494 | { |
495 | platform_driver_unregister(&db8500_regulator_driver); |
496 | } |
497 | |
498 | arch_initcall(db8500_regulator_init); |
499 | module_exit(db8500_regulator_exit); |
500 | |
501 | MODULE_AUTHOR("STMicroelectronics/ST-Ericsson" ); |
502 | MODULE_DESCRIPTION("DB8500 regulator driver" ); |
503 | MODULE_LICENSE("GPL v2" ); |
504 | |