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16b27467 RF |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Core MFD support for Cirrus Logic Madera codecs | |
4 | * | |
5 | * Copyright (C) 2015-2018 Cirrus Logic | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; version 2. | |
10 | */ | |
11 | ||
12 | #include <linux/device.h> | |
13 | #include <linux/delay.h> | |
14 | #include <linux/err.h> | |
15 | #include <linux/gpio.h> | |
16 | #include <linux/mfd/core.h> | |
17 | #include <linux/module.h> | |
7f947213 | 18 | #include <linux/mutex.h> |
16b27467 RF |
19 | #include <linux/notifier.h> |
20 | #include <linux/of.h> | |
21 | #include <linux/of_gpio.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/pm_runtime.h> | |
24 | #include <linux/regmap.h> | |
25 | #include <linux/regulator/consumer.h> | |
26 | #include <linux/regulator/machine.h> | |
27 | #include <linux/regulator/of_regulator.h> | |
28 | ||
29 | #include <linux/mfd/madera/core.h> | |
30 | #include <linux/mfd/madera/registers.h> | |
31 | ||
32 | #include "madera.h" | |
33 | ||
34 | #define CS47L35_SILICON_ID 0x6360 | |
35 | #define CS47L85_SILICON_ID 0x6338 | |
36 | #define CS47L90_SILICON_ID 0x6364 | |
37 | ||
38 | #define MADERA_32KZ_MCLK2 1 | |
39 | ||
40 | static const char * const madera_core_supplies[] = { | |
41 | "AVDD", | |
42 | "DBVDD1", | |
43 | }; | |
44 | ||
45 | static const struct mfd_cell madera_ldo1_devs[] = { | |
46 | { .name = "madera-ldo1" }, | |
47 | }; | |
48 | ||
49 | static const char * const cs47l35_supplies[] = { | |
50 | "MICVDD", | |
51 | "DBVDD2", | |
52 | "CPVDD1", | |
53 | "CPVDD2", | |
54 | "SPKVDD", | |
55 | }; | |
56 | ||
57 | static const struct mfd_cell cs47l35_devs[] = { | |
58 | { .name = "madera-pinctrl", }, | |
59 | { .name = "madera-irq", }, | |
60 | { .name = "madera-micsupp", }, | |
61 | { .name = "madera-gpio", }, | |
62 | { .name = "madera-extcon", }, | |
63 | { | |
64 | .name = "cs47l35-codec", | |
65 | .parent_supplies = cs47l35_supplies, | |
66 | .num_parent_supplies = ARRAY_SIZE(cs47l35_supplies), | |
67 | }, | |
68 | }; | |
69 | ||
70 | static const char * const cs47l85_supplies[] = { | |
71 | "MICVDD", | |
72 | "DBVDD2", | |
73 | "DBVDD3", | |
74 | "DBVDD4", | |
75 | "CPVDD1", | |
76 | "CPVDD2", | |
77 | "SPKVDDL", | |
78 | "SPKVDDR", | |
79 | }; | |
80 | ||
81 | static const struct mfd_cell cs47l85_devs[] = { | |
82 | { .name = "madera-pinctrl", }, | |
83 | { .name = "madera-irq", }, | |
84 | { .name = "madera-micsupp" }, | |
85 | { .name = "madera-gpio", }, | |
86 | { .name = "madera-extcon", }, | |
87 | { | |
88 | .name = "cs47l85-codec", | |
89 | .parent_supplies = cs47l85_supplies, | |
90 | .num_parent_supplies = ARRAY_SIZE(cs47l85_supplies), | |
91 | }, | |
92 | }; | |
93 | ||
94 | static const char * const cs47l90_supplies[] = { | |
95 | "MICVDD", | |
96 | "DBVDD2", | |
97 | "DBVDD3", | |
98 | "DBVDD4", | |
99 | "CPVDD1", | |
100 | "CPVDD2", | |
101 | }; | |
102 | ||
103 | static const struct mfd_cell cs47l90_devs[] = { | |
104 | { .name = "madera-pinctrl", }, | |
105 | { .name = "madera-irq", }, | |
106 | { .name = "madera-micsupp", }, | |
107 | { .name = "madera-gpio", }, | |
108 | { .name = "madera-extcon", }, | |
109 | { | |
110 | .name = "cs47l90-codec", | |
111 | .parent_supplies = cs47l90_supplies, | |
112 | .num_parent_supplies = ARRAY_SIZE(cs47l90_supplies), | |
113 | }, | |
114 | }; | |
115 | ||
116 | /* Used by madera-i2c and madera-spi drivers */ | |
117 | const char *madera_name_from_type(enum madera_type type) | |
118 | { | |
119 | switch (type) { | |
120 | case CS47L35: | |
121 | return "CS47L35"; | |
122 | case CS47L85: | |
123 | return "CS47L85"; | |
124 | case CS47L90: | |
125 | return "CS47L90"; | |
126 | case CS47L91: | |
127 | return "CS47L91"; | |
128 | case WM1840: | |
129 | return "WM1840"; | |
130 | default: | |
131 | return "Unknown"; | |
132 | } | |
133 | } | |
134 | EXPORT_SYMBOL_GPL(madera_name_from_type); | |
135 | ||
b04e68d1 RF |
136 | #define MADERA_BOOT_POLL_INTERVAL_USEC 5000 |
137 | #define MADERA_BOOT_POLL_TIMEOUT_USEC 25000 | |
16b27467 RF |
138 | |
139 | static int madera_wait_for_boot(struct madera *madera) | |
140 | { | |
b04e68d1 | 141 | ktime_t timeout; |
16b27467 | 142 | unsigned int val; |
b04e68d1 | 143 | int ret = 0; |
16b27467 RF |
144 | |
145 | /* | |
146 | * We can't use an interrupt as we need to runtime resume to do so, | |
147 | * so we poll the status bit. This won't race with the interrupt | |
148 | * handler because it will be blocked on runtime resume. | |
b04e68d1 RF |
149 | * The chip could NAK a read request while it is booting so ignore |
150 | * errors from regmap_read. | |
16b27467 | 151 | */ |
b04e68d1 RF |
152 | timeout = ktime_add_us(ktime_get(), MADERA_BOOT_POLL_TIMEOUT_USEC); |
153 | regmap_read(madera->regmap, MADERA_IRQ1_RAW_STATUS_1, &val); | |
154 | while (!(val & MADERA_BOOT_DONE_STS1) && | |
155 | !ktime_after(ktime_get(), timeout)) { | |
156 | usleep_range(MADERA_BOOT_POLL_INTERVAL_USEC / 2, | |
157 | MADERA_BOOT_POLL_INTERVAL_USEC); | |
158 | regmap_read(madera->regmap, MADERA_IRQ1_RAW_STATUS_1, &val); | |
4bcb83e0 | 159 | } |
b04e68d1 RF |
160 | |
161 | if (!(val & MADERA_BOOT_DONE_STS1)) { | |
162 | dev_err(madera->dev, "Polling BOOT_DONE_STS timed out\n"); | |
163 | ret = -ETIMEDOUT; | |
164 | } | |
16b27467 RF |
165 | |
166 | /* | |
167 | * BOOT_DONE defaults to unmasked on boot so we must ack it. | |
b04e68d1 | 168 | * Do this even after a timeout to avoid interrupt storms. |
16b27467 RF |
169 | */ |
170 | regmap_write(madera->regmap, MADERA_IRQ1_STATUS_1, | |
171 | MADERA_BOOT_DONE_EINT1); | |
172 | ||
173 | pm_runtime_mark_last_busy(madera->dev); | |
174 | ||
175 | return ret; | |
176 | } | |
177 | ||
178 | static int madera_soft_reset(struct madera *madera) | |
179 | { | |
180 | int ret; | |
181 | ||
182 | ret = regmap_write(madera->regmap, MADERA_SOFTWARE_RESET, 0); | |
183 | if (ret != 0) { | |
184 | dev_err(madera->dev, "Failed to soft reset device: %d\n", ret); | |
185 | return ret; | |
186 | } | |
187 | ||
188 | /* Allow time for internal clocks to startup after reset */ | |
189 | usleep_range(1000, 2000); | |
190 | ||
191 | return 0; | |
192 | } | |
193 | ||
194 | static void madera_enable_hard_reset(struct madera *madera) | |
195 | { | |
196 | if (!madera->pdata.reset) | |
197 | return; | |
198 | ||
199 | /* | |
200 | * There are many existing out-of-tree users of these codecs that we | |
201 | * can't break so preserve the expected behaviour of setting the line | |
202 | * low to assert reset. | |
203 | */ | |
204 | gpiod_set_raw_value_cansleep(madera->pdata.reset, 0); | |
205 | } | |
206 | ||
207 | static void madera_disable_hard_reset(struct madera *madera) | |
208 | { | |
209 | if (!madera->pdata.reset) | |
210 | return; | |
211 | ||
212 | gpiod_set_raw_value_cansleep(madera->pdata.reset, 1); | |
213 | usleep_range(1000, 2000); | |
214 | } | |
215 | ||
216 | static int __maybe_unused madera_runtime_resume(struct device *dev) | |
217 | { | |
218 | struct madera *madera = dev_get_drvdata(dev); | |
219 | int ret; | |
220 | ||
221 | dev_dbg(dev, "Leaving sleep mode\n"); | |
222 | ||
223 | ret = regulator_enable(madera->dcvdd); | |
224 | if (ret) { | |
225 | dev_err(dev, "Failed to enable DCVDD: %d\n", ret); | |
226 | return ret; | |
227 | } | |
228 | ||
229 | regcache_cache_only(madera->regmap, false); | |
230 | regcache_cache_only(madera->regmap_32bit, false); | |
231 | ||
232 | ret = madera_wait_for_boot(madera); | |
233 | if (ret) | |
234 | goto err; | |
235 | ||
236 | ret = regcache_sync(madera->regmap); | |
237 | if (ret) { | |
238 | dev_err(dev, "Failed to restore 16-bit register cache\n"); | |
239 | goto err; | |
240 | } | |
241 | ||
242 | ret = regcache_sync(madera->regmap_32bit); | |
243 | if (ret) { | |
244 | dev_err(dev, "Failed to restore 32-bit register cache\n"); | |
245 | goto err; | |
246 | } | |
247 | ||
248 | return 0; | |
249 | ||
250 | err: | |
251 | regcache_cache_only(madera->regmap_32bit, true); | |
252 | regcache_cache_only(madera->regmap, true); | |
253 | regulator_disable(madera->dcvdd); | |
254 | ||
255 | return ret; | |
256 | } | |
257 | ||
258 | static int __maybe_unused madera_runtime_suspend(struct device *dev) | |
259 | { | |
260 | struct madera *madera = dev_get_drvdata(dev); | |
261 | ||
262 | dev_dbg(madera->dev, "Entering sleep mode\n"); | |
263 | ||
264 | regcache_cache_only(madera->regmap, true); | |
265 | regcache_mark_dirty(madera->regmap); | |
266 | regcache_cache_only(madera->regmap_32bit, true); | |
267 | regcache_mark_dirty(madera->regmap_32bit); | |
268 | ||
269 | regulator_disable(madera->dcvdd); | |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
274 | const struct dev_pm_ops madera_pm_ops = { | |
275 | SET_RUNTIME_PM_OPS(madera_runtime_suspend, | |
276 | madera_runtime_resume, | |
277 | NULL) | |
278 | }; | |
279 | EXPORT_SYMBOL_GPL(madera_pm_ops); | |
280 | ||
281 | const struct of_device_id madera_of_match[] = { | |
282 | { .compatible = "cirrus,cs47l35", .data = (void *)CS47L35 }, | |
283 | { .compatible = "cirrus,cs47l85", .data = (void *)CS47L85 }, | |
284 | { .compatible = "cirrus,cs47l90", .data = (void *)CS47L90 }, | |
285 | { .compatible = "cirrus,cs47l91", .data = (void *)CS47L91 }, | |
286 | { .compatible = "cirrus,wm1840", .data = (void *)WM1840 }, | |
287 | {} | |
288 | }; | |
289 | EXPORT_SYMBOL_GPL(madera_of_match); | |
290 | ||
291 | static int madera_get_reset_gpio(struct madera *madera) | |
292 | { | |
293 | struct gpio_desc *reset; | |
294 | int ret; | |
295 | ||
296 | if (madera->pdata.reset) | |
297 | return 0; | |
298 | ||
299 | reset = devm_gpiod_get_optional(madera->dev, "reset", GPIOD_OUT_LOW); | |
300 | if (IS_ERR(reset)) { | |
301 | ret = PTR_ERR(reset); | |
302 | if (ret != -EPROBE_DEFER) | |
303 | dev_err(madera->dev, "Failed to request /RESET: %d\n", | |
304 | ret); | |
305 | return ret; | |
306 | } | |
307 | ||
308 | /* | |
309 | * A hard reset is needed for full reset of the chip. We allow running | |
310 | * without hard reset only because it can be useful for early | |
311 | * prototyping and some debugging, but we need to warn it's not ideal. | |
312 | */ | |
313 | if (!reset) | |
314 | dev_warn(madera->dev, | |
315 | "Running without reset GPIO is not recommended\n"); | |
316 | ||
317 | madera->pdata.reset = reset; | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
322 | static void madera_set_micbias_info(struct madera *madera) | |
323 | { | |
324 | /* | |
325 | * num_childbias is an array because future codecs can have different | |
326 | * childbiases for each micbias. Unspecified values default to 0. | |
327 | */ | |
328 | switch (madera->type) { | |
329 | case CS47L35: | |
330 | madera->num_micbias = 2; | |
331 | madera->num_childbias[0] = 2; | |
332 | madera->num_childbias[1] = 2; | |
333 | return; | |
334 | case CS47L85: | |
335 | case WM1840: | |
336 | madera->num_micbias = 4; | |
337 | /* no child biases */ | |
338 | return; | |
339 | case CS47L90: | |
340 | case CS47L91: | |
341 | madera->num_micbias = 2; | |
342 | madera->num_childbias[0] = 4; | |
343 | madera->num_childbias[1] = 4; | |
344 | return; | |
345 | default: | |
346 | return; | |
347 | } | |
348 | } | |
349 | ||
350 | int madera_dev_init(struct madera *madera) | |
351 | { | |
352 | struct device *dev = madera->dev; | |
353 | unsigned int hwid; | |
354 | int (*patch_fn)(struct madera *) = NULL; | |
355 | const struct mfd_cell *mfd_devs; | |
356 | int n_devs = 0; | |
357 | int i, ret; | |
358 | ||
359 | dev_set_drvdata(madera->dev, madera); | |
360 | BLOCKING_INIT_NOTIFIER_HEAD(&madera->notifier); | |
7f947213 RF |
361 | mutex_init(&madera->dapm_ptr_lock); |
362 | ||
16b27467 RF |
363 | madera_set_micbias_info(madera); |
364 | ||
365 | /* | |
366 | * We need writable hw config info that all children can share. | |
367 | * Simplest to take one shared copy of pdata struct. | |
368 | */ | |
369 | if (dev_get_platdata(madera->dev)) { | |
370 | memcpy(&madera->pdata, dev_get_platdata(madera->dev), | |
371 | sizeof(madera->pdata)); | |
372 | } | |
373 | ||
374 | ret = madera_get_reset_gpio(madera); | |
375 | if (ret) | |
376 | return ret; | |
377 | ||
378 | regcache_cache_only(madera->regmap, true); | |
379 | regcache_cache_only(madera->regmap_32bit, true); | |
380 | ||
381 | for (i = 0; i < ARRAY_SIZE(madera_core_supplies); i++) | |
382 | madera->core_supplies[i].supply = madera_core_supplies[i]; | |
383 | ||
384 | madera->num_core_supplies = ARRAY_SIZE(madera_core_supplies); | |
385 | ||
386 | /* | |
387 | * On some codecs DCVDD could be supplied by the internal LDO1. | |
388 | * For those we must add the LDO1 driver before requesting DCVDD | |
389 | * No devm_ because we need to control shutdown order of children. | |
390 | */ | |
391 | switch (madera->type) { | |
392 | case CS47L35: | |
393 | case CS47L90: | |
394 | case CS47L91: | |
395 | break; | |
396 | case CS47L85: | |
397 | case WM1840: | |
398 | ret = mfd_add_devices(madera->dev, PLATFORM_DEVID_NONE, | |
399 | madera_ldo1_devs, | |
400 | ARRAY_SIZE(madera_ldo1_devs), | |
401 | NULL, 0, NULL); | |
402 | if (ret) { | |
403 | dev_err(dev, "Failed to add LDO1 child: %d\n", ret); | |
404 | return ret; | |
405 | } | |
406 | break; | |
407 | default: | |
408 | /* No point continuing if the type is unknown */ | |
409 | dev_err(madera->dev, "Unknown device type %d\n", madera->type); | |
410 | return -ENODEV; | |
411 | } | |
412 | ||
413 | ret = devm_regulator_bulk_get(dev, madera->num_core_supplies, | |
414 | madera->core_supplies); | |
415 | if (ret) { | |
416 | dev_err(dev, "Failed to request core supplies: %d\n", ret); | |
417 | goto err_devs; | |
418 | } | |
419 | ||
420 | /* | |
421 | * Don't use devres here. If the regulator is one of our children it | |
422 | * will already have been removed before devres cleanup on this mfd | |
423 | * driver tries to call put() on it. We need control of shutdown order. | |
424 | */ | |
425 | madera->dcvdd = regulator_get(madera->dev, "DCVDD"); | |
426 | if (IS_ERR(madera->dcvdd)) { | |
427 | ret = PTR_ERR(madera->dcvdd); | |
428 | dev_err(dev, "Failed to request DCVDD: %d\n", ret); | |
429 | goto err_devs; | |
430 | } | |
431 | ||
432 | ret = regulator_bulk_enable(madera->num_core_supplies, | |
433 | madera->core_supplies); | |
434 | if (ret) { | |
435 | dev_err(dev, "Failed to enable core supplies: %d\n", ret); | |
436 | goto err_dcvdd; | |
437 | } | |
438 | ||
439 | ret = regulator_enable(madera->dcvdd); | |
440 | if (ret) { | |
441 | dev_err(dev, "Failed to enable DCVDD: %d\n", ret); | |
442 | goto err_enable; | |
443 | } | |
444 | ||
445 | madera_disable_hard_reset(madera); | |
446 | ||
447 | regcache_cache_only(madera->regmap, false); | |
448 | regcache_cache_only(madera->regmap_32bit, false); | |
449 | ||
450 | /* | |
451 | * Now we can power up and verify that this is a chip we know about | |
452 | * before we start doing any writes to its registers. | |
453 | */ | |
454 | ret = regmap_read(madera->regmap, MADERA_SOFTWARE_RESET, &hwid); | |
455 | if (ret) { | |
456 | dev_err(dev, "Failed to read ID register: %d\n", ret); | |
457 | goto err_reset; | |
458 | } | |
459 | ||
460 | switch (hwid) { | |
461 | case CS47L35_SILICON_ID: | |
462 | if (IS_ENABLED(CONFIG_MFD_CS47L35)) { | |
463 | switch (madera->type) { | |
464 | case CS47L35: | |
465 | patch_fn = cs47l35_patch; | |
466 | mfd_devs = cs47l35_devs; | |
467 | n_devs = ARRAY_SIZE(cs47l35_devs); | |
468 | break; | |
469 | default: | |
470 | break; | |
471 | } | |
472 | } | |
473 | break; | |
474 | case CS47L85_SILICON_ID: | |
475 | if (IS_ENABLED(CONFIG_MFD_CS47L85)) { | |
476 | switch (madera->type) { | |
477 | case CS47L85: | |
478 | case WM1840: | |
479 | patch_fn = cs47l85_patch; | |
480 | mfd_devs = cs47l85_devs; | |
481 | n_devs = ARRAY_SIZE(cs47l85_devs); | |
482 | break; | |
483 | default: | |
484 | break; | |
485 | } | |
486 | } | |
487 | break; | |
488 | case CS47L90_SILICON_ID: | |
489 | if (IS_ENABLED(CONFIG_MFD_CS47L90)) { | |
490 | switch (madera->type) { | |
491 | case CS47L90: | |
492 | case CS47L91: | |
493 | patch_fn = cs47l90_patch; | |
494 | mfd_devs = cs47l90_devs; | |
495 | n_devs = ARRAY_SIZE(cs47l90_devs); | |
496 | break; | |
497 | default: | |
498 | break; | |
499 | } | |
500 | } | |
501 | break; | |
502 | default: | |
503 | dev_err(madera->dev, "Unknown device ID: %x\n", hwid); | |
504 | ret = -EINVAL; | |
505 | goto err_reset; | |
506 | } | |
507 | ||
508 | if (!n_devs) { | |
509 | dev_err(madera->dev, "Device ID 0x%x not a %s\n", hwid, | |
510 | madera->type_name); | |
511 | ret = -ENODEV; | |
512 | goto err_reset; | |
513 | } | |
514 | ||
515 | /* | |
516 | * It looks like a device we support. If we don't have a hard reset | |
517 | * we can now attempt a soft reset. | |
518 | */ | |
519 | if (!madera->pdata.reset) { | |
520 | ret = madera_soft_reset(madera); | |
521 | if (ret) | |
522 | goto err_reset; | |
523 | } | |
524 | ||
525 | ret = madera_wait_for_boot(madera); | |
526 | if (ret) { | |
527 | dev_err(madera->dev, "Device failed initial boot: %d\n", ret); | |
528 | goto err_reset; | |
529 | } | |
530 | ||
531 | ret = regmap_read(madera->regmap, MADERA_HARDWARE_REVISION, | |
532 | &madera->rev); | |
533 | if (ret) { | |
534 | dev_err(dev, "Failed to read revision register: %d\n", ret); | |
535 | goto err_reset; | |
536 | } | |
537 | madera->rev &= MADERA_HW_REVISION_MASK; | |
538 | ||
539 | dev_info(dev, "%s silicon revision %d\n", madera->type_name, | |
540 | madera->rev); | |
541 | ||
542 | /* Apply hardware patch */ | |
543 | if (patch_fn) { | |
544 | ret = patch_fn(madera); | |
545 | if (ret) { | |
546 | dev_err(madera->dev, "Failed to apply patch %d\n", ret); | |
547 | goto err_reset; | |
548 | } | |
549 | } | |
550 | ||
551 | /* Init 32k clock sourced from MCLK2 */ | |
552 | ret = regmap_update_bits(madera->regmap, | |
553 | MADERA_CLOCK_32K_1, | |
554 | MADERA_CLK_32K_ENA_MASK | MADERA_CLK_32K_SRC_MASK, | |
555 | MADERA_CLK_32K_ENA | MADERA_32KZ_MCLK2); | |
556 | if (ret) { | |
557 | dev_err(madera->dev, "Failed to init 32k clock: %d\n", ret); | |
558 | goto err_reset; | |
559 | } | |
560 | ||
561 | pm_runtime_set_active(madera->dev); | |
562 | pm_runtime_enable(madera->dev); | |
563 | pm_runtime_set_autosuspend_delay(madera->dev, 100); | |
564 | pm_runtime_use_autosuspend(madera->dev); | |
565 | ||
566 | /* No devm_ because we need to control shutdown order of children */ | |
567 | ret = mfd_add_devices(madera->dev, PLATFORM_DEVID_NONE, | |
568 | mfd_devs, n_devs, | |
569 | NULL, 0, NULL); | |
570 | if (ret) { | |
571 | dev_err(madera->dev, "Failed to add subdevices: %d\n", ret); | |
572 | goto err_pm_runtime; | |
573 | } | |
574 | ||
575 | return 0; | |
576 | ||
577 | err_pm_runtime: | |
578 | pm_runtime_disable(madera->dev); | |
579 | err_reset: | |
580 | madera_enable_hard_reset(madera); | |
581 | regulator_disable(madera->dcvdd); | |
582 | err_enable: | |
583 | regulator_bulk_disable(madera->num_core_supplies, | |
584 | madera->core_supplies); | |
585 | err_dcvdd: | |
586 | regulator_put(madera->dcvdd); | |
587 | err_devs: | |
588 | mfd_remove_devices(dev); | |
589 | ||
590 | return ret; | |
591 | } | |
592 | EXPORT_SYMBOL_GPL(madera_dev_init); | |
593 | ||
594 | int madera_dev_exit(struct madera *madera) | |
595 | { | |
596 | /* Prevent any IRQs being serviced while we clean up */ | |
597 | disable_irq(madera->irq); | |
598 | ||
599 | /* | |
600 | * DCVDD could be supplied by a child node, we must disable it before | |
601 | * removing the children, and prevent PM runtime from turning it back on | |
602 | */ | |
603 | pm_runtime_disable(madera->dev); | |
604 | ||
605 | regulator_disable(madera->dcvdd); | |
606 | regulator_put(madera->dcvdd); | |
607 | ||
608 | mfd_remove_devices(madera->dev); | |
609 | madera_enable_hard_reset(madera); | |
610 | ||
611 | regulator_bulk_disable(madera->num_core_supplies, | |
612 | madera->core_supplies); | |
613 | return 0; | |
614 | } | |
615 | EXPORT_SYMBOL_GPL(madera_dev_exit); | |
616 | ||
617 | MODULE_DESCRIPTION("Madera core MFD driver"); | |
618 | MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); | |
619 | MODULE_LICENSE("GPL v2"); |