1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * wm8731.c -- WM8731 ALSA SoC Audio driver
4 *
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright 2006-12 Wolfson Microelectronics, plc
7 *
8 * Author: Richard Purdie <richard@openedhand.com>
9 *
10 * Based on wm8753.c by Liam Girdwood
11 */
12
13 #include <linux/module.h>
14 #include <linux/moduleparam.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
17 #include <linux/pm.h>
18 #include <linux/slab.h>
19 #include <linux/regmap.h>
20 #include <linux/regulator/consumer.h>
21 #include <linux/clk.h>
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include <sound/initval.h>
27 #include <sound/tlv.h>
28
29 #include "wm8731.h"
30
31 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
32 "AVDD",
33 "HPVDD",
34 "DCVDD",
35 "DBVDD",
36 };
37
38 /*
39 * wm8731 register cache
40 */
41 static const struct reg_default wm8731_reg_defaults[] = {
42 { 0, 0x0097 },
43 { 1, 0x0097 },
44 { 2, 0x0079 },
45 { 3, 0x0079 },
46 { 4, 0x000a },
47 { 5, 0x0008 },
48 { 6, 0x009f },
49 { 7, 0x000a },
50 { 8, 0x0000 },
51 { 9, 0x0000 },
52 };
53
wm8731_volatile(struct device * dev,unsigned int reg)54 static bool wm8731_volatile(struct device *dev, unsigned int reg)
55 {
56 return reg == WM8731_RESET;
57 }
58
59 #define wm8731_reset(m) regmap_write(m, WM8731_RESET, 0)
60
61 static const char *wm8731_input_select[] = {"Line In", "Mic"};
62
63 static SOC_ENUM_SINGLE_DECL(wm8731_insel_enum,
64 WM8731_APANA, 2, wm8731_input_select);
65
66 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 };
67
wm8731_set_deemph(struct snd_soc_component * component)68 static int wm8731_set_deemph(struct snd_soc_component *component)
69 {
70 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
71 int val, i, best;
72
73 /* If we're using deemphasis select the nearest available sample
74 * rate.
75 */
76 if (wm8731->deemph) {
77 best = 1;
78 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) {
79 if (abs(wm8731_deemph[i] - wm8731->playback_fs) <
80 abs(wm8731_deemph[best] - wm8731->playback_fs))
81 best = i;
82 }
83
84 val = best << 1;
85 } else {
86 best = 0;
87 val = 0;
88 }
89
90 dev_dbg(component->dev, "Set deemphasis %d (%dHz)\n",
91 best, wm8731_deemph[best]);
92
93 return snd_soc_component_update_bits(component, WM8731_APDIGI, 0x6, val);
94 }
95
wm8731_get_deemph(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)96 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol,
97 struct snd_ctl_elem_value *ucontrol)
98 {
99 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
100 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
101
102 ucontrol->value.integer.value[0] = wm8731->deemph;
103
104 return 0;
105 }
106
wm8731_put_deemph(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)107 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
108 struct snd_ctl_elem_value *ucontrol)
109 {
110 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
111 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
112 unsigned int deemph = ucontrol->value.integer.value[0];
113 int ret = 0;
114
115 if (deemph > 1)
116 return -EINVAL;
117
118 mutex_lock(&wm8731->lock);
119 if (wm8731->deemph != deemph) {
120 wm8731->deemph = deemph;
121
122 wm8731_set_deemph(component);
123
124 ret = 1;
125 }
126 mutex_unlock(&wm8731->lock);
127
128 return ret;
129 }
130
131 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0);
132 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0);
133 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
134 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0);
135
136 static const struct snd_kcontrol_new wm8731_snd_controls[] = {
137
138 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
139 0, 127, 0, out_tlv),
140 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
141 7, 1, 0),
142
143 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0,
144 in_tlv),
145 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
146
147 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv),
148 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1),
149
150 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1,
151 sidetone_tlv),
152
153 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
154 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
155
156 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
157 wm8731_get_deemph, wm8731_put_deemph),
158 };
159
160 /* Output Mixer */
161 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
162 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
163 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
164 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
165 };
166
167 /* Input mux */
168 static const struct snd_kcontrol_new wm8731_input_mux_controls =
169 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum);
170
171 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
172 SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0),
173 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0),
174 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
175 &wm8731_output_mixer_controls[0],
176 ARRAY_SIZE(wm8731_output_mixer_controls)),
177 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
178 SND_SOC_DAPM_OUTPUT("LOUT"),
179 SND_SOC_DAPM_OUTPUT("LHPOUT"),
180 SND_SOC_DAPM_OUTPUT("ROUT"),
181 SND_SOC_DAPM_OUTPUT("RHPOUT"),
182 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
183 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
184 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
185 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
186 SND_SOC_DAPM_INPUT("MICIN"),
187 SND_SOC_DAPM_INPUT("RLINEIN"),
188 SND_SOC_DAPM_INPUT("LLINEIN"),
189 };
190
wm8731_check_osc(struct snd_soc_dapm_widget * source,struct snd_soc_dapm_widget * sink)191 static int wm8731_check_osc(struct snd_soc_dapm_widget *source,
192 struct snd_soc_dapm_widget *sink)
193 {
194 struct snd_soc_component *component = snd_soc_dapm_to_component(source->dapm);
195 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
196
197 return wm8731->sysclk_type == WM8731_SYSCLK_XTAL;
198 }
199
200 static const struct snd_soc_dapm_route wm8731_intercon[] = {
201 {"DAC", NULL, "OSC", wm8731_check_osc},
202 {"ADC", NULL, "OSC", wm8731_check_osc},
203 {"DAC", NULL, "ACTIVE"},
204 {"ADC", NULL, "ACTIVE"},
205
206 /* output mixer */
207 {"Output Mixer", "Line Bypass Switch", "Line Input"},
208 {"Output Mixer", "HiFi Playback Switch", "DAC"},
209 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
210
211 /* outputs */
212 {"RHPOUT", NULL, "Output Mixer"},
213 {"ROUT", NULL, "Output Mixer"},
214 {"LHPOUT", NULL, "Output Mixer"},
215 {"LOUT", NULL, "Output Mixer"},
216
217 /* input mux */
218 {"Input Mux", "Line In", "Line Input"},
219 {"Input Mux", "Mic", "Mic Bias"},
220 {"ADC", NULL, "Input Mux"},
221
222 /* inputs */
223 {"Line Input", NULL, "LLINEIN"},
224 {"Line Input", NULL, "RLINEIN"},
225 {"Mic Bias", NULL, "MICIN"},
226 };
227
228 struct _coeff_div {
229 u32 mclk;
230 u32 rate;
231 u16 fs;
232 u8 sr:4;
233 u8 bosr:1;
234 u8 usb:1;
235 };
236
237 /* codec mclk clock divider coefficients */
238 static const struct _coeff_div coeff_div[] = {
239 /* 48k */
240 {12288000, 48000, 256, 0x0, 0x0, 0x0},
241 {18432000, 48000, 384, 0x0, 0x1, 0x0},
242 {12000000, 48000, 250, 0x0, 0x0, 0x1},
243
244 /* 32k */
245 {12288000, 32000, 384, 0x6, 0x0, 0x0},
246 {18432000, 32000, 576, 0x6, 0x1, 0x0},
247 {12000000, 32000, 375, 0x6, 0x0, 0x1},
248
249 /* 8k */
250 {12288000, 8000, 1536, 0x3, 0x0, 0x0},
251 {18432000, 8000, 2304, 0x3, 0x1, 0x0},
252 {11289600, 8000, 1408, 0xb, 0x0, 0x0},
253 {16934400, 8000, 2112, 0xb, 0x1, 0x0},
254 {12000000, 8000, 1500, 0x3, 0x0, 0x1},
255
256 /* 96k */
257 {12288000, 96000, 128, 0x7, 0x0, 0x0},
258 {18432000, 96000, 192, 0x7, 0x1, 0x0},
259 {12000000, 96000, 125, 0x7, 0x0, 0x1},
260
261 /* 44.1k */
262 {11289600, 44100, 256, 0x8, 0x0, 0x0},
263 {16934400, 44100, 384, 0x8, 0x1, 0x0},
264 {12000000, 44100, 272, 0x8, 0x1, 0x1},
265
266 /* 88.2k */
267 {11289600, 88200, 128, 0xf, 0x0, 0x0},
268 {16934400, 88200, 192, 0xf, 0x1, 0x0},
269 {12000000, 88200, 136, 0xf, 0x1, 0x1},
270 };
271
272 /* rates constraints */
273 static const unsigned int wm8731_rates_12000000[] = {
274 8000, 32000, 44100, 48000, 96000, 88200,
275 };
276
277 static const unsigned int wm8731_rates_12288000_18432000[] = {
278 8000, 32000, 48000, 96000,
279 };
280
281 static const unsigned int wm8731_rates_11289600_16934400[] = {
282 8000, 44100, 88200,
283 };
284
285 static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = {
286 .list = wm8731_rates_12000000,
287 .count = ARRAY_SIZE(wm8731_rates_12000000),
288 };
289
290 static const
291 struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = {
292 .list = wm8731_rates_12288000_18432000,
293 .count = ARRAY_SIZE(wm8731_rates_12288000_18432000),
294 };
295
296 static const
297 struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = {
298 .list = wm8731_rates_11289600_16934400,
299 .count = ARRAY_SIZE(wm8731_rates_11289600_16934400),
300 };
301
get_coeff(int mclk,int rate)302 static inline int get_coeff(int mclk, int rate)
303 {
304 int i;
305
306 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
307 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
308 return i;
309 }
310 return 0;
311 }
312
wm8731_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)313 static int wm8731_hw_params(struct snd_pcm_substream *substream,
314 struct snd_pcm_hw_params *params,
315 struct snd_soc_dai *dai)
316 {
317 struct snd_soc_component *component = dai->component;
318 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
319 u16 iface = snd_soc_component_read(component, WM8731_IFACE) & 0xfff3;
320 int i = get_coeff(wm8731->sysclk, params_rate(params));
321 u16 srate = (coeff_div[i].sr << 2) |
322 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
323
324 wm8731->playback_fs = params_rate(params);
325
326 snd_soc_component_write(component, WM8731_SRATE, srate);
327
328 /* bit size */
329 switch (params_width(params)) {
330 case 16:
331 break;
332 case 20:
333 iface |= 0x0004;
334 break;
335 case 24:
336 iface |= 0x0008;
337 break;
338 case 32:
339 iface |= 0x000c;
340 break;
341 }
342
343 wm8731_set_deemph(component);
344
345 snd_soc_component_write(component, WM8731_IFACE, iface);
346 return 0;
347 }
348
wm8731_mute(struct snd_soc_dai * dai,int mute,int direction)349 static int wm8731_mute(struct snd_soc_dai *dai, int mute, int direction)
350 {
351 struct snd_soc_component *component = dai->component;
352 u16 mute_reg = snd_soc_component_read(component, WM8731_APDIGI) & 0xfff7;
353
354 if (mute)
355 snd_soc_component_write(component, WM8731_APDIGI, mute_reg | 0x8);
356 else
357 snd_soc_component_write(component, WM8731_APDIGI, mute_reg);
358 return 0;
359 }
360
wm8731_set_dai_sysclk(struct snd_soc_dai * codec_dai,int clk_id,unsigned int freq,int dir)361 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
362 int clk_id, unsigned int freq, int dir)
363 {
364 struct snd_soc_component *component = codec_dai->component;
365 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
366 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
367
368 switch (clk_id) {
369 case WM8731_SYSCLK_XTAL:
370 case WM8731_SYSCLK_MCLK:
371 if (wm8731->mclk && clk_set_rate(wm8731->mclk, freq))
372 return -EINVAL;
373 wm8731->sysclk_type = clk_id;
374 break;
375 default:
376 return -EINVAL;
377 }
378
379 switch (freq) {
380 case 0:
381 wm8731->constraints = NULL;
382 break;
383 case 12000000:
384 wm8731->constraints = &wm8731_constraints_12000000;
385 break;
386 case 12288000:
387 case 18432000:
388 wm8731->constraints = &wm8731_constraints_12288000_18432000;
389 break;
390 case 16934400:
391 case 11289600:
392 wm8731->constraints = &wm8731_constraints_11289600_16934400;
393 break;
394 default:
395 return -EINVAL;
396 }
397
398 wm8731->sysclk = freq;
399
400 snd_soc_dapm_sync(dapm);
401
402 return 0;
403 }
404
405
wm8731_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)406 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
407 unsigned int fmt)
408 {
409 struct snd_soc_component *component = codec_dai->component;
410 u16 iface = 0;
411
412 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
413 case SND_SOC_DAIFMT_CBP_CFP:
414 iface |= 0x0040;
415 break;
416 case SND_SOC_DAIFMT_CBC_CFC:
417 break;
418 default:
419 return -EINVAL;
420 }
421
422 /* interface format */
423 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
424 case SND_SOC_DAIFMT_I2S:
425 iface |= 0x0002;
426 break;
427 case SND_SOC_DAIFMT_RIGHT_J:
428 break;
429 case SND_SOC_DAIFMT_LEFT_J:
430 iface |= 0x0001;
431 break;
432 case SND_SOC_DAIFMT_DSP_A:
433 iface |= 0x0013;
434 break;
435 case SND_SOC_DAIFMT_DSP_B:
436 iface |= 0x0003;
437 break;
438 default:
439 return -EINVAL;
440 }
441
442 /* clock inversion */
443 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
444 case SND_SOC_DAIFMT_NB_NF:
445 break;
446 case SND_SOC_DAIFMT_IB_IF:
447 iface |= 0x0090;
448 break;
449 case SND_SOC_DAIFMT_IB_NF:
450 iface |= 0x0080;
451 break;
452 case SND_SOC_DAIFMT_NB_IF:
453 iface |= 0x0010;
454 break;
455 default:
456 return -EINVAL;
457 }
458
459 /* set iface */
460 snd_soc_component_write(component, WM8731_IFACE, iface);
461 return 0;
462 }
463
wm8731_set_bias_level(struct snd_soc_component * component,enum snd_soc_bias_level level)464 static int wm8731_set_bias_level(struct snd_soc_component *component,
465 enum snd_soc_bias_level level)
466 {
467 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
468 int ret;
469 u16 reg;
470
471 switch (level) {
472 case SND_SOC_BIAS_ON:
473 if (wm8731->mclk) {
474 ret = clk_prepare_enable(wm8731->mclk);
475 if (ret)
476 return ret;
477 }
478 break;
479 case SND_SOC_BIAS_PREPARE:
480 break;
481 case SND_SOC_BIAS_STANDBY:
482 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
483 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
484 wm8731->supplies);
485 if (ret != 0)
486 return ret;
487
488 regcache_sync(wm8731->regmap);
489 }
490
491 /* Clear PWROFF, gate CLKOUT, everything else as-is */
492 reg = snd_soc_component_read(component, WM8731_PWR) & 0xff7f;
493 snd_soc_component_write(component, WM8731_PWR, reg | 0x0040);
494 break;
495 case SND_SOC_BIAS_OFF:
496 if (wm8731->mclk)
497 clk_disable_unprepare(wm8731->mclk);
498 snd_soc_component_write(component, WM8731_PWR, 0xffff);
499 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
500 wm8731->supplies);
501 regcache_mark_dirty(wm8731->regmap);
502 break;
503 }
504 return 0;
505 }
506
wm8731_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)507 static int wm8731_startup(struct snd_pcm_substream *substream,
508 struct snd_soc_dai *dai)
509 {
510 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(dai->component);
511
512 if (wm8731->constraints)
513 snd_pcm_hw_constraint_list(substream->runtime, 0,
514 SNDRV_PCM_HW_PARAM_RATE,
515 wm8731->constraints);
516
517 return 0;
518 }
519
520 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000
521
522 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
523 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
524
525 static const struct snd_soc_dai_ops wm8731_dai_ops = {
526 .startup = wm8731_startup,
527 .hw_params = wm8731_hw_params,
528 .mute_stream = wm8731_mute,
529 .set_sysclk = wm8731_set_dai_sysclk,
530 .set_fmt = wm8731_set_dai_fmt,
531 .no_capture_mute = 1,
532 };
533
534 static struct snd_soc_dai_driver wm8731_dai = {
535 .name = "wm8731-hifi",
536 .playback = {
537 .stream_name = "Playback",
538 .channels_min = 1,
539 .channels_max = 2,
540 .rates = WM8731_RATES,
541 .formats = WM8731_FORMATS,},
542 .capture = {
543 .stream_name = "Capture",
544 .channels_min = 1,
545 .channels_max = 2,
546 .rates = WM8731_RATES,
547 .formats = WM8731_FORMATS,},
548 .ops = &wm8731_dai_ops,
549 .symmetric_rate = 1,
550 };
551
552 static const struct snd_soc_component_driver soc_component_dev_wm8731 = {
553 .set_bias_level = wm8731_set_bias_level,
554 .controls = wm8731_snd_controls,
555 .num_controls = ARRAY_SIZE(wm8731_snd_controls),
556 .dapm_widgets = wm8731_dapm_widgets,
557 .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
558 .dapm_routes = wm8731_intercon,
559 .num_dapm_routes = ARRAY_SIZE(wm8731_intercon),
560 .suspend_bias_off = 1,
561 .idle_bias_on = 1,
562 .use_pmdown_time = 1,
563 .endianness = 1,
564 .non_legacy_dai_naming = 1,
565 };
566
wm8731_init(struct device * dev,struct wm8731_priv * wm8731)567 int wm8731_init(struct device *dev, struct wm8731_priv *wm8731)
568 {
569 int ret = 0, i;
570
571 wm8731->mclk = devm_clk_get(dev, "mclk");
572 if (IS_ERR(wm8731->mclk)) {
573 ret = PTR_ERR(wm8731->mclk);
574 if (ret == -ENOENT) {
575 wm8731->mclk = NULL;
576 dev_warn(dev, "Assuming static MCLK\n");
577 } else {
578 dev_err(dev, "Failed to get MCLK: %d\n", ret);
579 return ret;
580 }
581 }
582
583 mutex_init(&wm8731->lock);
584
585 for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
586 wm8731->supplies[i].supply = wm8731_supply_names[i];
587
588 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(wm8731->supplies),
589 wm8731->supplies);
590 if (ret != 0) {
591 dev_err(dev, "Failed to request supplies: %d\n", ret);
592 return ret;
593 }
594
595 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
596 wm8731->supplies);
597 if (ret != 0) {
598 dev_err(dev, "Failed to enable supplies: %d\n", ret);
599 return ret;
600 }
601
602 ret = wm8731_reset(wm8731->regmap);
603 if (ret < 0) {
604 dev_err(dev, "Failed to issue reset: %d\n", ret);
605 goto err_regulator_enable;
606 }
607
608 /* Clear POWEROFF, keep everything else disabled */
609 regmap_write(wm8731->regmap, WM8731_PWR, 0x7f);
610
611 /* Latch the update bits */
612 regmap_update_bits(wm8731->regmap, WM8731_LOUT1V, 0x100, 0);
613 regmap_update_bits(wm8731->regmap, WM8731_ROUT1V, 0x100, 0);
614 regmap_update_bits(wm8731->regmap, WM8731_LINVOL, 0x100, 0);
615 regmap_update_bits(wm8731->regmap, WM8731_RINVOL, 0x100, 0);
616
617 /* Disable bypass path by default */
618 regmap_update_bits(wm8731->regmap, WM8731_APANA, 0x8, 0);
619
620 regcache_mark_dirty(wm8731->regmap);
621
622 ret = devm_snd_soc_register_component(dev,
623 &soc_component_dev_wm8731, &wm8731_dai, 1);
624 if (ret != 0) {
625 dev_err(dev, "Failed to register CODEC: %d\n", ret);
626 goto err_regulator_enable;
627 }
628
629 return 0;
630
631 err_regulator_enable:
632 /* Regulators will be enabled by bias management */
633 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
634
635 return ret;
636 }
637 EXPORT_SYMBOL_GPL(wm8731_init);
638
639 const struct regmap_config wm8731_regmap = {
640 .reg_bits = 7,
641 .val_bits = 9,
642
643 .max_register = WM8731_RESET,
644 .volatile_reg = wm8731_volatile,
645
646 .cache_type = REGCACHE_RBTREE,
647 .reg_defaults = wm8731_reg_defaults,
648 .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults),
649 };
650 EXPORT_SYMBOL_GPL(wm8731_regmap);
651
652 MODULE_DESCRIPTION("ASoC WM8731 driver");
653 MODULE_AUTHOR("Richard Purdie");
654 MODULE_LICENSE("GPL");
655