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13#include <linux/module.h>
14#include <linux/moduleparam.h>
15#include <linux/init.h>
16#include <linux/gpio/consumer.h>
17#include <linux/delay.h>
18#include <linux/pm.h>
19#include <linux/pm_runtime.h>
20#include <linux/of_device.h>
21#include <linux/regulator/consumer.h>
22#include <linux/slab.h>
23#include <sound/core.h>
24#include <sound/pcm.h>
25#include <sound/pcm_params.h>
26#include <sound/soc.h>
27#include <sound/initval.h>
28#include <sound/tlv.h>
29#include <sound/soc-dapm.h>
30
31#include "wm8804.h"
32
33#define WM8804_NUM_SUPPLIES 2
34static const char *wm8804_supply_names[WM8804_NUM_SUPPLIES] = {
35 "PVDD",
36 "DVDD"
37};
38
39static const struct reg_default wm8804_reg_defaults[] = {
40 { 3, 0x21 },
41 { 4, 0xFD },
42 { 5, 0x36 },
43 { 6, 0x07 },
44 { 7, 0x16 },
45 { 8, 0x18 },
46 { 9, 0xFF },
47 { 10, 0x00 },
48 { 18, 0x00 },
49 { 19, 0x00 },
50 { 20, 0x00 },
51 { 21, 0x71 },
52 { 22, 0x0B },
53 { 23, 0x70 },
54 { 24, 0x57 },
55 { 26, 0x42 },
56 { 27, 0x06 },
57 { 28, 0x06 },
58 { 29, 0x80 },
59 { 30, 0x07 },
60};
61
62struct wm8804_priv {
63 struct device *dev;
64 struct regmap *regmap;
65 struct regulator_bulk_data supplies[WM8804_NUM_SUPPLIES];
66 struct notifier_block disable_nb[WM8804_NUM_SUPPLIES];
67 int mclk_div;
68
69 struct gpio_desc *reset;
70
71 int aif_pwr;
72};
73
74static int txsrc_put(struct snd_kcontrol *kcontrol,
75 struct snd_ctl_elem_value *ucontrol);
76
77static int wm8804_aif_event(struct snd_soc_dapm_widget *w,
78 struct snd_kcontrol *kcontrol, int event);
79
80
81
82
83
84
85#define WM8804_REGULATOR_EVENT(n) \
86static int wm8804_regulator_event_##n(struct notifier_block *nb, \
87 unsigned long event, void *data) \
88{ \
89 struct wm8804_priv *wm8804 = container_of(nb, struct wm8804_priv, \
90 disable_nb[n]); \
91 if (event & REGULATOR_EVENT_DISABLE) { \
92 regcache_mark_dirty(wm8804->regmap); \
93 } \
94 return 0; \
95}
96
97WM8804_REGULATOR_EVENT(0)
98WM8804_REGULATOR_EVENT(1)
99
100static const char *txsrc_text[] = { "S/PDIF RX", "AIF" };
101static const SOC_ENUM_SINGLE_DECL(txsrc, WM8804_SPDTX4, 6, txsrc_text);
102
103static const struct snd_kcontrol_new wm8804_tx_source_mux[] = {
104 SOC_DAPM_ENUM_EXT("Input Source", txsrc,
105 snd_soc_dapm_get_enum_double, txsrc_put),
106};
107
108static const struct snd_soc_dapm_widget wm8804_dapm_widgets[] = {
109SND_SOC_DAPM_OUTPUT("SPDIF Out"),
110SND_SOC_DAPM_INPUT("SPDIF In"),
111
112SND_SOC_DAPM_PGA("SPDIFTX", WM8804_PWRDN, 2, 1, NULL, 0),
113SND_SOC_DAPM_PGA("SPDIFRX", WM8804_PWRDN, 1, 1, NULL, 0),
114
115SND_SOC_DAPM_MUX("Tx Source", SND_SOC_NOPM, 6, 0, wm8804_tx_source_mux),
116
117SND_SOC_DAPM_AIF_OUT_E("AIFTX", NULL, 0, SND_SOC_NOPM, 0, 0, wm8804_aif_event,
118 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
119SND_SOC_DAPM_AIF_IN_E("AIFRX", NULL, 0, SND_SOC_NOPM, 0, 0, wm8804_aif_event,
120 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
121};
122
123static const struct snd_soc_dapm_route wm8804_dapm_routes[] = {
124 { "AIFRX", NULL, "Playback" },
125 { "Tx Source", "AIF", "AIFRX" },
126
127 { "SPDIFRX", NULL, "SPDIF In" },
128 { "Tx Source", "S/PDIF RX", "SPDIFRX" },
129
130 { "SPDIFTX", NULL, "Tx Source" },
131 { "SPDIF Out", NULL, "SPDIFTX" },
132
133 { "AIFTX", NULL, "SPDIFRX" },
134 { "Capture", NULL, "AIFTX" },
135};
136
137static int wm8804_aif_event(struct snd_soc_dapm_widget *w,
138 struct snd_kcontrol *kcontrol, int event)
139{
140 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
141 struct wm8804_priv *wm8804 = snd_soc_codec_get_drvdata(codec);
142
143 switch (event) {
144 case SND_SOC_DAPM_POST_PMU:
145
146 if (!wm8804->aif_pwr)
147 snd_soc_update_bits(codec, WM8804_PWRDN, 0x10, 0x0);
148 wm8804->aif_pwr++;
149 break;
150 case SND_SOC_DAPM_POST_PMD:
151
152 wm8804->aif_pwr--;
153 if (!wm8804->aif_pwr)
154 snd_soc_update_bits(codec, WM8804_PWRDN, 0x10, 0x10);
155 break;
156 }
157
158 return 0;
159}
160
161static int txsrc_put(struct snd_kcontrol *kcontrol,
162 struct snd_ctl_elem_value *ucontrol)
163{
164 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
165 struct snd_soc_dapm_context *dapm = &codec->dapm;
166 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
167 unsigned int val = ucontrol->value.enumerated.item[0] << e->shift_l;
168 unsigned int mask = 1 << e->shift_l;
169 unsigned int txpwr;
170
171 if (val != 0 && val != mask)
172 return -EINVAL;
173
174 snd_soc_dapm_mutex_lock(dapm);
175
176 if (snd_soc_test_bits(codec, e->reg, mask, val)) {
177
178 txpwr = snd_soc_read(codec, WM8804_PWRDN) & 0x4;
179
180
181 snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x4);
182
183
184 snd_soc_update_bits(codec, e->reg, mask, val);
185
186
187 snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, txpwr);
188 }
189
190 snd_soc_dapm_mutex_unlock(dapm);
191
192 return 0;
193}
194
195static bool wm8804_volatile(struct device *dev, unsigned int reg)
196{
197 switch (reg) {
198 case WM8804_RST_DEVID1:
199 case WM8804_DEVID2:
200 case WM8804_DEVREV:
201 case WM8804_INTSTAT:
202 case WM8804_SPDSTAT:
203 case WM8804_RXCHAN1:
204 case WM8804_RXCHAN2:
205 case WM8804_RXCHAN3:
206 case WM8804_RXCHAN4:
207 case WM8804_RXCHAN5:
208 return true;
209 default:
210 return false;
211 }
212}
213
214static int wm8804_soft_reset(struct wm8804_priv *wm8804)
215{
216 return regmap_write(wm8804->regmap, WM8804_RST_DEVID1, 0x0);
217}
218
219static int wm8804_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
220{
221 struct snd_soc_codec *codec;
222 u16 format, master, bcp, lrp;
223
224 codec = dai->codec;
225
226 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
227 case SND_SOC_DAIFMT_I2S:
228 format = 0x2;
229 break;
230 case SND_SOC_DAIFMT_RIGHT_J:
231 format = 0x0;
232 break;
233 case SND_SOC_DAIFMT_LEFT_J:
234 format = 0x1;
235 break;
236 case SND_SOC_DAIFMT_DSP_A:
237 case SND_SOC_DAIFMT_DSP_B:
238 format = 0x3;
239 break;
240 default:
241 dev_err(dai->dev, "Unknown dai format\n");
242 return -EINVAL;
243 }
244
245
246 snd_soc_update_bits(codec, WM8804_AIFTX, 0x3, format);
247 snd_soc_update_bits(codec, WM8804_AIFRX, 0x3, format);
248
249 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
250 case SND_SOC_DAIFMT_CBM_CFM:
251 master = 1;
252 break;
253 case SND_SOC_DAIFMT_CBS_CFS:
254 master = 0;
255 break;
256 default:
257 dev_err(dai->dev, "Unknown master/slave configuration\n");
258 return -EINVAL;
259 }
260
261
262 snd_soc_update_bits(codec, WM8804_AIFRX, 0x40, master << 6);
263
264 bcp = lrp = 0;
265 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
266 case SND_SOC_DAIFMT_NB_NF:
267 break;
268 case SND_SOC_DAIFMT_IB_IF:
269 bcp = lrp = 1;
270 break;
271 case SND_SOC_DAIFMT_IB_NF:
272 bcp = 1;
273 break;
274 case SND_SOC_DAIFMT_NB_IF:
275 lrp = 1;
276 break;
277 default:
278 dev_err(dai->dev, "Unknown polarity configuration\n");
279 return -EINVAL;
280 }
281
282
283 snd_soc_update_bits(codec, WM8804_AIFTX, 0x10 | 0x20,
284 (bcp << 4) | (lrp << 5));
285 snd_soc_update_bits(codec, WM8804_AIFRX, 0x10 | 0x20,
286 (bcp << 4) | (lrp << 5));
287 return 0;
288}
289
290static int wm8804_hw_params(struct snd_pcm_substream *substream,
291 struct snd_pcm_hw_params *params,
292 struct snd_soc_dai *dai)
293{
294 struct snd_soc_codec *codec;
295 u16 blen;
296
297 codec = dai->codec;
298
299 switch (params_width(params)) {
300 case 16:
301 blen = 0x0;
302 break;
303 case 20:
304 blen = 0x1;
305 break;
306 case 24:
307 blen = 0x2;
308 break;
309 default:
310 dev_err(dai->dev, "Unsupported word length: %u\n",
311 params_width(params));
312 return -EINVAL;
313 }
314
315
316 snd_soc_update_bits(codec, WM8804_AIFTX, 0xc, blen << 2);
317 snd_soc_update_bits(codec, WM8804_AIFRX, 0xc, blen << 2);
318
319 return 0;
320}
321
322struct pll_div {
323 u32 prescale:1;
324 u32 mclkdiv:1;
325 u32 freqmode:2;
326 u32 n:4;
327 u32 k:22;
328};
329
330
331static struct {
332 unsigned int div;
333 unsigned int freqmode;
334 unsigned int mclkdiv;
335} post_table[] = {
336 { 2, 0, 0 },
337 { 4, 0, 1 },
338 { 4, 1, 0 },
339 { 8, 1, 1 },
340 { 8, 2, 0 },
341 { 16, 2, 1 },
342 { 12, 3, 0 },
343 { 24, 3, 1 }
344};
345
346#define FIXED_PLL_SIZE ((1ULL << 22) * 10)
347static int pll_factors(struct pll_div *pll_div, unsigned int target,
348 unsigned int source, unsigned int mclk_div)
349{
350 u64 Kpart;
351 unsigned long int K, Ndiv, Nmod, tmp;
352 int i;
353
354
355
356
357
358 for (i = 0; i < ARRAY_SIZE(post_table); i++) {
359 tmp = target * post_table[i].div;
360 if ((tmp >= 90000000 && tmp <= 100000000) &&
361 (mclk_div == post_table[i].mclkdiv)) {
362 pll_div->freqmode = post_table[i].freqmode;
363 pll_div->mclkdiv = post_table[i].mclkdiv;
364 target *= post_table[i].div;
365 break;
366 }
367 }
368
369 if (i == ARRAY_SIZE(post_table)) {
370 pr_err("%s: Unable to scale output frequency: %uHz\n",
371 __func__, target);
372 return -EINVAL;
373 }
374
375 pll_div->prescale = 0;
376 Ndiv = target / source;
377 if (Ndiv < 5) {
378 source >>= 1;
379 pll_div->prescale = 1;
380 Ndiv = target / source;
381 }
382
383 if (Ndiv < 5 || Ndiv > 13) {
384 pr_err("%s: WM8804 N value is not within the recommended range: %lu\n",
385 __func__, Ndiv);
386 return -EINVAL;
387 }
388 pll_div->n = Ndiv;
389
390 Nmod = target % source;
391 Kpart = FIXED_PLL_SIZE * (u64)Nmod;
392
393 do_div(Kpart, source);
394
395 K = Kpart & 0xffffffff;
396 if ((K % 10) >= 5)
397 K += 5;
398 K /= 10;
399 pll_div->k = K;
400
401 return 0;
402}
403
404static int wm8804_set_pll(struct snd_soc_dai *dai, int pll_id,
405 int source, unsigned int freq_in,
406 unsigned int freq_out)
407{
408 struct snd_soc_codec *codec = dai->codec;
409 struct wm8804_priv *wm8804 = snd_soc_codec_get_drvdata(codec);
410 bool change;
411
412 if (!freq_in || !freq_out) {
413
414 regmap_update_bits_check(wm8804->regmap, WM8804_PWRDN,
415 0x1, 0x1, &change);
416 if (change)
417 pm_runtime_put(wm8804->dev);
418 } else {
419 int ret;
420 struct pll_div pll_div;
421
422 ret = pll_factors(&pll_div, freq_out, freq_in,
423 wm8804->mclk_div);
424 if (ret)
425 return ret;
426
427
428 regmap_update_bits_check(wm8804->regmap, WM8804_PWRDN,
429 0x1, 0x1, &change);
430 if (!change)
431 pm_runtime_get_sync(wm8804->dev);
432
433
434 snd_soc_update_bits(codec, WM8804_PLL4, 0xf | 0x10,
435 pll_div.n | (pll_div.prescale << 4));
436
437 snd_soc_update_bits(codec, WM8804_PLL5, 0x3 | 0x8,
438 pll_div.freqmode | (pll_div.mclkdiv << 3));
439
440 snd_soc_write(codec, WM8804_PLL1, pll_div.k & 0xff);
441 snd_soc_write(codec, WM8804_PLL2, (pll_div.k >> 8) & 0xff);
442 snd_soc_write(codec, WM8804_PLL3, pll_div.k >> 16);
443
444
445 snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0);
446 }
447
448 return 0;
449}
450
451static int wm8804_set_sysclk(struct snd_soc_dai *dai,
452 int clk_id, unsigned int freq, int dir)
453{
454 struct snd_soc_codec *codec;
455
456 codec = dai->codec;
457
458 switch (clk_id) {
459 case WM8804_TX_CLKSRC_MCLK:
460 if ((freq >= 10000000 && freq <= 14400000)
461 || (freq >= 16280000 && freq <= 27000000))
462 snd_soc_update_bits(codec, WM8804_PLL6, 0x80, 0x80);
463 else {
464 dev_err(dai->dev, "OSCCLOCK is not within the "
465 "recommended range: %uHz\n", freq);
466 return -EINVAL;
467 }
468 break;
469 case WM8804_TX_CLKSRC_PLL:
470 snd_soc_update_bits(codec, WM8804_PLL6, 0x80, 0);
471 break;
472 case WM8804_CLKOUT_SRC_CLK1:
473 snd_soc_update_bits(codec, WM8804_PLL6, 0x8, 0);
474 break;
475 case WM8804_CLKOUT_SRC_OSCCLK:
476 snd_soc_update_bits(codec, WM8804_PLL6, 0x8, 0x8);
477 break;
478 default:
479 dev_err(dai->dev, "Unknown clock source: %d\n", clk_id);
480 return -EINVAL;
481 }
482
483 return 0;
484}
485
486static int wm8804_set_clkdiv(struct snd_soc_dai *dai,
487 int div_id, int div)
488{
489 struct snd_soc_codec *codec;
490 struct wm8804_priv *wm8804;
491
492 codec = dai->codec;
493 switch (div_id) {
494 case WM8804_CLKOUT_DIV:
495 snd_soc_update_bits(codec, WM8804_PLL5, 0x30,
496 (div & 0x3) << 4);
497 break;
498 case WM8804_MCLK_DIV:
499 wm8804 = snd_soc_codec_get_drvdata(codec);
500 wm8804->mclk_div = div;
501 break;
502 default:
503 dev_err(dai->dev, "Unknown clock divider: %d\n", div_id);
504 return -EINVAL;
505 }
506 return 0;
507}
508
509static const struct snd_soc_dai_ops wm8804_dai_ops = {
510 .hw_params = wm8804_hw_params,
511 .set_fmt = wm8804_set_fmt,
512 .set_sysclk = wm8804_set_sysclk,
513 .set_clkdiv = wm8804_set_clkdiv,
514 .set_pll = wm8804_set_pll
515};
516
517#define WM8804_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
518 SNDRV_PCM_FMTBIT_S24_LE)
519
520#define WM8804_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
521 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 | \
522 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | \
523 SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000)
524
525static struct snd_soc_dai_driver wm8804_dai = {
526 .name = "wm8804-spdif",
527 .playback = {
528 .stream_name = "Playback",
529 .channels_min = 2,
530 .channels_max = 2,
531 .rates = WM8804_RATES,
532 .formats = WM8804_FORMATS,
533 },
534 .capture = {
535 .stream_name = "Capture",
536 .channels_min = 2,
537 .channels_max = 2,
538 .rates = WM8804_RATES,
539 .formats = WM8804_FORMATS,
540 },
541 .ops = &wm8804_dai_ops,
542 .symmetric_rates = 1
543};
544
545static const struct snd_soc_codec_driver soc_codec_dev_wm8804 = {
546 .idle_bias_off = true,
547
548 .dapm_widgets = wm8804_dapm_widgets,
549 .num_dapm_widgets = ARRAY_SIZE(wm8804_dapm_widgets),
550 .dapm_routes = wm8804_dapm_routes,
551 .num_dapm_routes = ARRAY_SIZE(wm8804_dapm_routes),
552};
553
554const struct regmap_config wm8804_regmap_config = {
555 .reg_bits = 8,
556 .val_bits = 8,
557
558 .max_register = WM8804_MAX_REGISTER,
559 .volatile_reg = wm8804_volatile,
560
561 .cache_type = REGCACHE_RBTREE,
562 .reg_defaults = wm8804_reg_defaults,
563 .num_reg_defaults = ARRAY_SIZE(wm8804_reg_defaults),
564};
565EXPORT_SYMBOL_GPL(wm8804_regmap_config);
566
567int wm8804_probe(struct device *dev, struct regmap *regmap)
568{
569 struct wm8804_priv *wm8804;
570 unsigned int id1, id2;
571 int i, ret;
572
573 wm8804 = devm_kzalloc(dev, sizeof(*wm8804), GFP_KERNEL);
574 if (!wm8804)
575 return -ENOMEM;
576
577 dev_set_drvdata(dev, wm8804);
578
579 wm8804->dev = dev;
580 wm8804->regmap = regmap;
581
582 wm8804->reset = devm_gpiod_get_optional(dev, "wlf,reset",
583 GPIOD_OUT_LOW);
584 if (IS_ERR(wm8804->reset)) {
585 ret = PTR_ERR(wm8804->reset);
586 dev_err(dev, "Failed to get reset line: %d\n", ret);
587 return ret;
588 }
589
590 for (i = 0; i < ARRAY_SIZE(wm8804->supplies); i++)
591 wm8804->supplies[i].supply = wm8804_supply_names[i];
592
593 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(wm8804->supplies),
594 wm8804->supplies);
595 if (ret) {
596 dev_err(dev, "Failed to request supplies: %d\n", ret);
597 return ret;
598 }
599
600 wm8804->disable_nb[0].notifier_call = wm8804_regulator_event_0;
601 wm8804->disable_nb[1].notifier_call = wm8804_regulator_event_1;
602
603
604 for (i = 0; i < ARRAY_SIZE(wm8804->supplies); i++) {
605 struct regulator *regulator = wm8804->supplies[i].consumer;
606
607 ret = devm_regulator_register_notifier(regulator,
608 &wm8804->disable_nb[i]);
609 if (ret != 0) {
610 dev_err(dev,
611 "Failed to register regulator notifier: %d\n",
612 ret);
613 return ret;
614 }
615 }
616
617 ret = regulator_bulk_enable(ARRAY_SIZE(wm8804->supplies),
618 wm8804->supplies);
619 if (ret) {
620 dev_err(dev, "Failed to enable supplies: %d\n", ret);
621 return ret;
622 }
623
624 if (wm8804->reset)
625 gpiod_set_value_cansleep(wm8804->reset, 1);
626
627 ret = regmap_read(regmap, WM8804_RST_DEVID1, &id1);
628 if (ret < 0) {
629 dev_err(dev, "Failed to read device ID: %d\n", ret);
630 goto err_reg_enable;
631 }
632
633 ret = regmap_read(regmap, WM8804_DEVID2, &id2);
634 if (ret < 0) {
635 dev_err(dev, "Failed to read device ID: %d\n", ret);
636 goto err_reg_enable;
637 }
638
639 id2 = (id2 << 8) | id1;
640
641 if (id2 != 0x8805) {
642 dev_err(dev, "Invalid device ID: %#x\n", id2);
643 ret = -EINVAL;
644 goto err_reg_enable;
645 }
646
647 ret = regmap_read(regmap, WM8804_DEVREV, &id1);
648 if (ret < 0) {
649 dev_err(dev, "Failed to read device revision: %d\n",
650 ret);
651 goto err_reg_enable;
652 }
653 dev_info(dev, "revision %c\n", id1 + 'A');
654
655 if (!wm8804->reset) {
656 ret = wm8804_soft_reset(wm8804);
657 if (ret < 0) {
658 dev_err(dev, "Failed to issue reset: %d\n", ret);
659 goto err_reg_enable;
660 }
661 }
662
663 ret = snd_soc_register_codec(dev, &soc_codec_dev_wm8804,
664 &wm8804_dai, 1);
665 if (ret < 0) {
666 dev_err(dev, "Failed to register CODEC: %d\n", ret);
667 goto err_reg_enable;
668 }
669
670 pm_runtime_set_active(dev);
671 pm_runtime_enable(dev);
672 pm_runtime_idle(dev);
673
674 return 0;
675
676err_reg_enable:
677 regulator_bulk_disable(ARRAY_SIZE(wm8804->supplies), wm8804->supplies);
678 return ret;
679}
680EXPORT_SYMBOL_GPL(wm8804_probe);
681
682void wm8804_remove(struct device *dev)
683{
684 pm_runtime_disable(dev);
685 snd_soc_unregister_codec(dev);
686}
687EXPORT_SYMBOL_GPL(wm8804_remove);
688
689#if IS_ENABLED(CONFIG_PM)
690static int wm8804_runtime_resume(struct device *dev)
691{
692 struct wm8804_priv *wm8804 = dev_get_drvdata(dev);
693 int ret;
694
695 ret = regulator_bulk_enable(ARRAY_SIZE(wm8804->supplies),
696 wm8804->supplies);
697 if (ret) {
698 dev_err(wm8804->dev, "Failed to enable supplies: %d\n", ret);
699 return ret;
700 }
701
702 regcache_sync(wm8804->regmap);
703
704
705 regmap_update_bits(wm8804->regmap, WM8804_PWRDN, 0x8, 0x0);
706
707 return 0;
708}
709
710static int wm8804_runtime_suspend(struct device *dev)
711{
712 struct wm8804_priv *wm8804 = dev_get_drvdata(dev);
713
714
715 regmap_update_bits(wm8804->regmap, WM8804_PWRDN, 0x8, 0x8);
716
717 regulator_bulk_disable(ARRAY_SIZE(wm8804->supplies),
718 wm8804->supplies);
719
720 return 0;
721}
722#endif
723
724const struct dev_pm_ops wm8804_pm = {
725 SET_RUNTIME_PM_OPS(wm8804_runtime_suspend, wm8804_runtime_resume, NULL)
726};
727EXPORT_SYMBOL_GPL(wm8804_pm);
728
729MODULE_DESCRIPTION("ASoC WM8804 driver");
730MODULE_AUTHOR("Dimitris Papastamos <dp@opensource.wolfsonmicro.com>");
731MODULE_LICENSE("GPL");
732
