xref: /openbmc/linux/sound/soc/codecs/wm8731.c (revision 8938c48f)
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/i2c.h>
19 #include <linux/slab.h>
20 #include <linux/regmap.h>
21 #include <linux/regulator/consumer.h>
22 #include <linux/spi/spi.h>
23 #include <linux/of_device.h>
24 #include <linux/mutex.h>
25 #include <linux/clk.h>
26 #include <sound/core.h>
27 #include <sound/pcm.h>
28 #include <sound/pcm_params.h>
29 #include <sound/soc.h>
30 #include <sound/initval.h>
31 #include <sound/tlv.h>
32 
33 #include "wm8731.h"
34 
35 #define WM8731_NUM_SUPPLIES 4
36 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
37 	"AVDD",
38 	"HPVDD",
39 	"DCVDD",
40 	"DBVDD",
41 };
42 
43 /* codec private data */
44 struct wm8731_priv {
45 	struct regmap *regmap;
46 	struct clk *mclk;
47 	struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
48 	const struct snd_pcm_hw_constraint_list *constraints;
49 	unsigned int sysclk;
50 	int sysclk_type;
51 	int playback_fs;
52 	bool deemph;
53 
54 	struct mutex lock;
55 };
56 
57 
58 /*
59  * wm8731 register cache
60  */
61 static const struct reg_default wm8731_reg_defaults[] = {
62 	{ 0, 0x0097 },
63 	{ 1, 0x0097 },
64 	{ 2, 0x0079 },
65 	{ 3, 0x0079 },
66 	{ 4, 0x000a },
67 	{ 5, 0x0008 },
68 	{ 6, 0x009f },
69 	{ 7, 0x000a },
70 	{ 8, 0x0000 },
71 	{ 9, 0x0000 },
72 };
73 
74 static bool wm8731_volatile(struct device *dev, unsigned int reg)
75 {
76 	return reg == WM8731_RESET;
77 }
78 
79 #define wm8731_reset(m)	regmap_write(m, WM8731_RESET, 0)
80 
81 static const char *wm8731_input_select[] = {"Line In", "Mic"};
82 
83 static SOC_ENUM_SINGLE_DECL(wm8731_insel_enum,
84 			    WM8731_APANA, 2, wm8731_input_select);
85 
86 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 };
87 
88 static int wm8731_set_deemph(struct snd_soc_component *component)
89 {
90 	struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
91 	int val, i, best;
92 
93 	/* If we're using deemphasis select the nearest available sample
94 	 * rate.
95 	 */
96 	if (wm8731->deemph) {
97 		best = 1;
98 		for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) {
99 			if (abs(wm8731_deemph[i] - wm8731->playback_fs) <
100 			    abs(wm8731_deemph[best] - wm8731->playback_fs))
101 				best = i;
102 		}
103 
104 		val = best << 1;
105 	} else {
106 		best = 0;
107 		val = 0;
108 	}
109 
110 	dev_dbg(component->dev, "Set deemphasis %d (%dHz)\n",
111 		best, wm8731_deemph[best]);
112 
113 	return snd_soc_component_update_bits(component, WM8731_APDIGI, 0x6, val);
114 }
115 
116 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol,
117 			     struct snd_ctl_elem_value *ucontrol)
118 {
119 	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
120 	struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
121 
122 	ucontrol->value.integer.value[0] = wm8731->deemph;
123 
124 	return 0;
125 }
126 
127 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
128 			     struct snd_ctl_elem_value *ucontrol)
129 {
130 	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
131 	struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
132 	unsigned int deemph = ucontrol->value.integer.value[0];
133 	int ret = 0;
134 
135 	if (deemph > 1)
136 		return -EINVAL;
137 
138 	mutex_lock(&wm8731->lock);
139 	if (wm8731->deemph != deemph) {
140 		wm8731->deemph = deemph;
141 
142 		wm8731_set_deemph(component);
143 
144 		ret = 1;
145 	}
146 	mutex_unlock(&wm8731->lock);
147 
148 	return ret;
149 }
150 
151 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0);
152 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0);
153 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
154 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0);
155 
156 static const struct snd_kcontrol_new wm8731_snd_controls[] = {
157 
158 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
159 		 0, 127, 0, out_tlv),
160 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
161 	7, 1, 0),
162 
163 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0,
164 		 in_tlv),
165 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
166 
167 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv),
168 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1),
169 
170 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1,
171 	       sidetone_tlv),
172 
173 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
174 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
175 
176 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
177 		    wm8731_get_deemph, wm8731_put_deemph),
178 };
179 
180 /* Output Mixer */
181 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
182 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
183 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
184 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
185 };
186 
187 /* Input mux */
188 static const struct snd_kcontrol_new wm8731_input_mux_controls =
189 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum);
190 
191 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
192 SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0),
193 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0),
194 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
195 	&wm8731_output_mixer_controls[0],
196 	ARRAY_SIZE(wm8731_output_mixer_controls)),
197 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
198 SND_SOC_DAPM_OUTPUT("LOUT"),
199 SND_SOC_DAPM_OUTPUT("LHPOUT"),
200 SND_SOC_DAPM_OUTPUT("ROUT"),
201 SND_SOC_DAPM_OUTPUT("RHPOUT"),
202 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
203 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
204 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
205 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
206 SND_SOC_DAPM_INPUT("MICIN"),
207 SND_SOC_DAPM_INPUT("RLINEIN"),
208 SND_SOC_DAPM_INPUT("LLINEIN"),
209 };
210 
211 static int wm8731_check_osc(struct snd_soc_dapm_widget *source,
212 			    struct snd_soc_dapm_widget *sink)
213 {
214 	struct snd_soc_component *component = snd_soc_dapm_to_component(source->dapm);
215 	struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
216 
217 	return wm8731->sysclk_type == WM8731_SYSCLK_XTAL;
218 }
219 
220 static const struct snd_soc_dapm_route wm8731_intercon[] = {
221 	{"DAC", NULL, "OSC", wm8731_check_osc},
222 	{"ADC", NULL, "OSC", wm8731_check_osc},
223 	{"DAC", NULL, "ACTIVE"},
224 	{"ADC", NULL, "ACTIVE"},
225 
226 	/* output mixer */
227 	{"Output Mixer", "Line Bypass Switch", "Line Input"},
228 	{"Output Mixer", "HiFi Playback Switch", "DAC"},
229 	{"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
230 
231 	/* outputs */
232 	{"RHPOUT", NULL, "Output Mixer"},
233 	{"ROUT", NULL, "Output Mixer"},
234 	{"LHPOUT", NULL, "Output Mixer"},
235 	{"LOUT", NULL, "Output Mixer"},
236 
237 	/* input mux */
238 	{"Input Mux", "Line In", "Line Input"},
239 	{"Input Mux", "Mic", "Mic Bias"},
240 	{"ADC", NULL, "Input Mux"},
241 
242 	/* inputs */
243 	{"Line Input", NULL, "LLINEIN"},
244 	{"Line Input", NULL, "RLINEIN"},
245 	{"Mic Bias", NULL, "MICIN"},
246 };
247 
248 struct _coeff_div {
249 	u32 mclk;
250 	u32 rate;
251 	u16 fs;
252 	u8 sr:4;
253 	u8 bosr:1;
254 	u8 usb:1;
255 };
256 
257 /* codec mclk clock divider coefficients */
258 static const struct _coeff_div coeff_div[] = {
259 	/* 48k */
260 	{12288000, 48000, 256, 0x0, 0x0, 0x0},
261 	{18432000, 48000, 384, 0x0, 0x1, 0x0},
262 	{12000000, 48000, 250, 0x0, 0x0, 0x1},
263 
264 	/* 32k */
265 	{12288000, 32000, 384, 0x6, 0x0, 0x0},
266 	{18432000, 32000, 576, 0x6, 0x1, 0x0},
267 	{12000000, 32000, 375, 0x6, 0x0, 0x1},
268 
269 	/* 8k */
270 	{12288000, 8000, 1536, 0x3, 0x0, 0x0},
271 	{18432000, 8000, 2304, 0x3, 0x1, 0x0},
272 	{11289600, 8000, 1408, 0xb, 0x0, 0x0},
273 	{16934400, 8000, 2112, 0xb, 0x1, 0x0},
274 	{12000000, 8000, 1500, 0x3, 0x0, 0x1},
275 
276 	/* 96k */
277 	{12288000, 96000, 128, 0x7, 0x0, 0x0},
278 	{18432000, 96000, 192, 0x7, 0x1, 0x0},
279 	{12000000, 96000, 125, 0x7, 0x0, 0x1},
280 
281 	/* 44.1k */
282 	{11289600, 44100, 256, 0x8, 0x0, 0x0},
283 	{16934400, 44100, 384, 0x8, 0x1, 0x0},
284 	{12000000, 44100, 272, 0x8, 0x1, 0x1},
285 
286 	/* 88.2k */
287 	{11289600, 88200, 128, 0xf, 0x0, 0x0},
288 	{16934400, 88200, 192, 0xf, 0x1, 0x0},
289 	{12000000, 88200, 136, 0xf, 0x1, 0x1},
290 };
291 
292 /* rates constraints */
293 static const unsigned int wm8731_rates_12000000[] = {
294 	8000, 32000, 44100, 48000, 96000, 88200,
295 };
296 
297 static const unsigned int wm8731_rates_12288000_18432000[] = {
298 	8000, 32000, 48000, 96000,
299 };
300 
301 static const unsigned int wm8731_rates_11289600_16934400[] = {
302 	8000, 44100, 88200,
303 };
304 
305 static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = {
306 	.list = wm8731_rates_12000000,
307 	.count = ARRAY_SIZE(wm8731_rates_12000000),
308 };
309 
310 static const
311 struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = {
312 	.list = wm8731_rates_12288000_18432000,
313 	.count = ARRAY_SIZE(wm8731_rates_12288000_18432000),
314 };
315 
316 static const
317 struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = {
318 	.list = wm8731_rates_11289600_16934400,
319 	.count = ARRAY_SIZE(wm8731_rates_11289600_16934400),
320 };
321 
322 static inline int get_coeff(int mclk, int rate)
323 {
324 	int i;
325 
326 	for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
327 		if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
328 			return i;
329 	}
330 	return 0;
331 }
332 
333 static int wm8731_hw_params(struct snd_pcm_substream *substream,
334 			    struct snd_pcm_hw_params *params,
335 			    struct snd_soc_dai *dai)
336 {
337 	struct snd_soc_component *component = dai->component;
338 	struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
339 	u16 iface = snd_soc_component_read(component, WM8731_IFACE) & 0xfff3;
340 	int i = get_coeff(wm8731->sysclk, params_rate(params));
341 	u16 srate = (coeff_div[i].sr << 2) |
342 		(coeff_div[i].bosr << 1) | coeff_div[i].usb;
343 
344 	wm8731->playback_fs = params_rate(params);
345 
346 	snd_soc_component_write(component, WM8731_SRATE, srate);
347 
348 	/* bit size */
349 	switch (params_width(params)) {
350 	case 16:
351 		break;
352 	case 20:
353 		iface |= 0x0004;
354 		break;
355 	case 24:
356 		iface |= 0x0008;
357 		break;
358 	case 32:
359 		iface |= 0x000c;
360 		break;
361 	}
362 
363 	wm8731_set_deemph(component);
364 
365 	snd_soc_component_write(component, WM8731_IFACE, iface);
366 	return 0;
367 }
368 
369 static int wm8731_mute(struct snd_soc_dai *dai, int mute, int direction)
370 {
371 	struct snd_soc_component *component = dai->component;
372 	u16 mute_reg = snd_soc_component_read(component, WM8731_APDIGI) & 0xfff7;
373 
374 	if (mute)
375 		snd_soc_component_write(component, WM8731_APDIGI, mute_reg | 0x8);
376 	else
377 		snd_soc_component_write(component, WM8731_APDIGI, mute_reg);
378 	return 0;
379 }
380 
381 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
382 		int clk_id, unsigned int freq, int dir)
383 {
384 	struct snd_soc_component *component = codec_dai->component;
385 	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
386 	struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
387 
388 	switch (clk_id) {
389 	case WM8731_SYSCLK_XTAL:
390 	case WM8731_SYSCLK_MCLK:
391 		if (wm8731->mclk && clk_set_rate(wm8731->mclk, freq))
392 			return -EINVAL;
393 		wm8731->sysclk_type = clk_id;
394 		break;
395 	default:
396 		return -EINVAL;
397 	}
398 
399 	switch (freq) {
400 	case 0:
401 		wm8731->constraints = NULL;
402 		break;
403 	case 12000000:
404 		wm8731->constraints = &wm8731_constraints_12000000;
405 		break;
406 	case 12288000:
407 	case 18432000:
408 		wm8731->constraints = &wm8731_constraints_12288000_18432000;
409 		break;
410 	case 16934400:
411 	case 11289600:
412 		wm8731->constraints = &wm8731_constraints_11289600_16934400;
413 		break;
414 	default:
415 		return -EINVAL;
416 	}
417 
418 	wm8731->sysclk = freq;
419 
420 	snd_soc_dapm_sync(dapm);
421 
422 	return 0;
423 }
424 
425 
426 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
427 		unsigned int fmt)
428 {
429 	struct snd_soc_component *component = codec_dai->component;
430 	u16 iface = 0;
431 
432 	/* set master/slave audio interface */
433 	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
434 	case SND_SOC_DAIFMT_CBM_CFM:
435 		iface |= 0x0040;
436 		break;
437 	case SND_SOC_DAIFMT_CBS_CFS:
438 		break;
439 	default:
440 		return -EINVAL;
441 	}
442 
443 	/* interface format */
444 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
445 	case SND_SOC_DAIFMT_I2S:
446 		iface |= 0x0002;
447 		break;
448 	case SND_SOC_DAIFMT_RIGHT_J:
449 		break;
450 	case SND_SOC_DAIFMT_LEFT_J:
451 		iface |= 0x0001;
452 		break;
453 	case SND_SOC_DAIFMT_DSP_A:
454 		iface |= 0x0013;
455 		break;
456 	case SND_SOC_DAIFMT_DSP_B:
457 		iface |= 0x0003;
458 		break;
459 	default:
460 		return -EINVAL;
461 	}
462 
463 	/* clock inversion */
464 	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
465 	case SND_SOC_DAIFMT_NB_NF:
466 		break;
467 	case SND_SOC_DAIFMT_IB_IF:
468 		iface |= 0x0090;
469 		break;
470 	case SND_SOC_DAIFMT_IB_NF:
471 		iface |= 0x0080;
472 		break;
473 	case SND_SOC_DAIFMT_NB_IF:
474 		iface |= 0x0010;
475 		break;
476 	default:
477 		return -EINVAL;
478 	}
479 
480 	/* set iface */
481 	snd_soc_component_write(component, WM8731_IFACE, iface);
482 	return 0;
483 }
484 
485 static int wm8731_set_bias_level(struct snd_soc_component *component,
486 				 enum snd_soc_bias_level level)
487 {
488 	struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
489 	int ret;
490 	u16 reg;
491 
492 	switch (level) {
493 	case SND_SOC_BIAS_ON:
494 		if (wm8731->mclk) {
495 			ret = clk_prepare_enable(wm8731->mclk);
496 			if (ret)
497 				return ret;
498 		}
499 		break;
500 	case SND_SOC_BIAS_PREPARE:
501 		break;
502 	case SND_SOC_BIAS_STANDBY:
503 		if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
504 			ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
505 						    wm8731->supplies);
506 			if (ret != 0)
507 				return ret;
508 
509 			regcache_sync(wm8731->regmap);
510 		}
511 
512 		/* Clear PWROFF, gate CLKOUT, everything else as-is */
513 		reg = snd_soc_component_read(component, WM8731_PWR) & 0xff7f;
514 		snd_soc_component_write(component, WM8731_PWR, reg | 0x0040);
515 		break;
516 	case SND_SOC_BIAS_OFF:
517 		if (wm8731->mclk)
518 			clk_disable_unprepare(wm8731->mclk);
519 		snd_soc_component_write(component, WM8731_PWR, 0xffff);
520 		regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
521 				       wm8731->supplies);
522 		regcache_mark_dirty(wm8731->regmap);
523 		break;
524 	}
525 	return 0;
526 }
527 
528 static int wm8731_startup(struct snd_pcm_substream *substream,
529 	struct snd_soc_dai *dai)
530 {
531 	struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(dai->component);
532 
533 	if (wm8731->constraints)
534 		snd_pcm_hw_constraint_list(substream->runtime, 0,
535 					   SNDRV_PCM_HW_PARAM_RATE,
536 					   wm8731->constraints);
537 
538 	return 0;
539 }
540 
541 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000
542 
543 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
544 	SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
545 
546 static const struct snd_soc_dai_ops wm8731_dai_ops = {
547 	.startup	= wm8731_startup,
548 	.hw_params	= wm8731_hw_params,
549 	.mute_stream	= wm8731_mute,
550 	.set_sysclk	= wm8731_set_dai_sysclk,
551 	.set_fmt	= wm8731_set_dai_fmt,
552 	.no_capture_mute = 1,
553 };
554 
555 static struct snd_soc_dai_driver wm8731_dai = {
556 	.name = "wm8731-hifi",
557 	.playback = {
558 		.stream_name = "Playback",
559 		.channels_min = 1,
560 		.channels_max = 2,
561 		.rates = WM8731_RATES,
562 		.formats = WM8731_FORMATS,},
563 	.capture = {
564 		.stream_name = "Capture",
565 		.channels_min = 1,
566 		.channels_max = 2,
567 		.rates = WM8731_RATES,
568 		.formats = WM8731_FORMATS,},
569 	.ops = &wm8731_dai_ops,
570 	.symmetric_rate = 1,
571 };
572 
573 static int wm8731_request_supplies(struct device *dev,
574 		struct wm8731_priv *wm8731)
575 {
576 	int ret = 0, i;
577 
578 	for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
579 		wm8731->supplies[i].supply = wm8731_supply_names[i];
580 
581 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(wm8731->supplies),
582 				 wm8731->supplies);
583 	if (ret != 0) {
584 		dev_err(dev, "Failed to request supplies: %d\n", ret);
585 		return ret;
586 	}
587 
588 	ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
589 				    wm8731->supplies);
590 	if (ret != 0) {
591 		dev_err(dev, "Failed to enable supplies: %d\n", ret);
592 		return ret;
593 	}
594 
595 	return 0;
596 }
597 
598 static int wm8731_hw_init(struct device *dev, struct wm8731_priv *wm8731)
599 {
600 	int ret = 0;
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 err_regulator_enable:
623 	/* Regulators will be enabled by bias management */
624 	regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
625 
626 	return ret;
627 }
628 
629 static const struct snd_soc_component_driver soc_component_dev_wm8731 = {
630 	.set_bias_level		= wm8731_set_bias_level,
631 	.controls		= wm8731_snd_controls,
632 	.num_controls		= ARRAY_SIZE(wm8731_snd_controls),
633 	.dapm_widgets		= wm8731_dapm_widgets,
634 	.num_dapm_widgets	= ARRAY_SIZE(wm8731_dapm_widgets),
635 	.dapm_routes		= wm8731_intercon,
636 	.num_dapm_routes	= ARRAY_SIZE(wm8731_intercon),
637 	.suspend_bias_off	= 1,
638 	.idle_bias_on		= 1,
639 	.use_pmdown_time	= 1,
640 	.endianness		= 1,
641 	.non_legacy_dai_naming	= 1,
642 };
643 
644 static const struct of_device_id wm8731_of_match[] = {
645 	{ .compatible = "wlf,wm8731", },
646 	{ }
647 };
648 
649 MODULE_DEVICE_TABLE(of, wm8731_of_match);
650 
651 static const struct regmap_config wm8731_regmap = {
652 	.reg_bits = 7,
653 	.val_bits = 9,
654 
655 	.max_register = WM8731_RESET,
656 	.volatile_reg = wm8731_volatile,
657 
658 	.cache_type = REGCACHE_RBTREE,
659 	.reg_defaults = wm8731_reg_defaults,
660 	.num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults),
661 };
662 
663 #if defined(CONFIG_SPI_MASTER)
664 static int wm8731_spi_probe(struct spi_device *spi)
665 {
666 	struct wm8731_priv *wm8731;
667 	int ret;
668 
669 	wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL);
670 	if (wm8731 == NULL)
671 		return -ENOMEM;
672 
673 	wm8731->mclk = devm_clk_get(&spi->dev, "mclk");
674 	if (IS_ERR(wm8731->mclk)) {
675 		ret = PTR_ERR(wm8731->mclk);
676 		if (ret == -ENOENT) {
677 			wm8731->mclk = NULL;
678 			dev_warn(&spi->dev, "Assuming static MCLK\n");
679 		} else {
680 			dev_err(&spi->dev, "Failed to get MCLK: %d\n",
681 				ret);
682 			return ret;
683 		}
684 	}
685 
686 	mutex_init(&wm8731->lock);
687 
688 	spi_set_drvdata(spi, wm8731);
689 
690 	ret = wm8731_request_supplies(&spi->dev, wm8731);
691 	if (ret != 0)
692 		return ret;
693 
694 	wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
695 	if (IS_ERR(wm8731->regmap)) {
696 		ret = PTR_ERR(wm8731->regmap);
697 		dev_err(&spi->dev, "Failed to allocate register map: %d\n",
698 			ret);
699 		return ret;
700 	}
701 
702 	ret = wm8731_hw_init(&spi->dev, wm8731);
703 	if (ret != 0)
704 		return ret;
705 
706 	ret = devm_snd_soc_register_component(&spi->dev,
707 			&soc_component_dev_wm8731, &wm8731_dai, 1);
708 	if (ret != 0) {
709 		dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret);
710 		return ret;
711 	}
712 
713 	return 0;
714 }
715 
716 static int wm8731_spi_remove(struct spi_device *spi)
717 {
718 	return 0;
719 }
720 
721 static struct spi_driver wm8731_spi_driver = {
722 	.driver = {
723 		.name	= "wm8731",
724 		.of_match_table = wm8731_of_match,
725 	},
726 	.probe		= wm8731_spi_probe,
727 	.remove		= wm8731_spi_remove,
728 };
729 #endif /* CONFIG_SPI_MASTER */
730 
731 #if IS_ENABLED(CONFIG_I2C)
732 static int wm8731_i2c_probe(struct i2c_client *i2c,
733 			    const struct i2c_device_id *id)
734 {
735 	struct wm8731_priv *wm8731;
736 	int ret;
737 
738 	wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv),
739 			      GFP_KERNEL);
740 	if (wm8731 == NULL)
741 		return -ENOMEM;
742 
743 	wm8731->mclk = devm_clk_get(&i2c->dev, "mclk");
744 	if (IS_ERR(wm8731->mclk)) {
745 		ret = PTR_ERR(wm8731->mclk);
746 		if (ret == -ENOENT) {
747 			wm8731->mclk = NULL;
748 			dev_warn(&i2c->dev, "Assuming static MCLK\n");
749 		} else {
750 			dev_err(&i2c->dev, "Failed to get MCLK: %d\n",
751 				ret);
752 			return ret;
753 		}
754 	}
755 
756 	mutex_init(&wm8731->lock);
757 
758 	i2c_set_clientdata(i2c, wm8731);
759 
760 	ret = wm8731_request_supplies(&i2c->dev, wm8731);
761 	if (ret != 0)
762 		return ret;
763 
764 	wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
765 	if (IS_ERR(wm8731->regmap)) {
766 		ret = PTR_ERR(wm8731->regmap);
767 		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
768 			ret);
769 		return ret;
770 	}
771 
772 	ret = wm8731_hw_init(&i2c->dev, wm8731);
773 	if (ret != 0)
774 		return ret;
775 
776 	ret = devm_snd_soc_register_component(&i2c->dev,
777 			&soc_component_dev_wm8731, &wm8731_dai, 1);
778 	if (ret != 0) {
779 		dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
780 		return ret;
781 	}
782 
783 	return 0;
784 }
785 
786 static int wm8731_i2c_remove(struct i2c_client *client)
787 {
788 	return 0;
789 }
790 
791 static const struct i2c_device_id wm8731_i2c_id[] = {
792 	{ "wm8731", 0 },
793 	{ }
794 };
795 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
796 
797 static struct i2c_driver wm8731_i2c_driver = {
798 	.driver = {
799 		.name = "wm8731",
800 		.of_match_table = wm8731_of_match,
801 	},
802 	.probe =    wm8731_i2c_probe,
803 	.remove =   wm8731_i2c_remove,
804 	.id_table = wm8731_i2c_id,
805 };
806 #endif
807 
808 static int __init wm8731_modinit(void)
809 {
810 	int ret = 0;
811 #if IS_ENABLED(CONFIG_I2C)
812 	ret = i2c_add_driver(&wm8731_i2c_driver);
813 	if (ret != 0) {
814 		printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
815 		       ret);
816 	}
817 #endif
818 #if defined(CONFIG_SPI_MASTER)
819 	ret = spi_register_driver(&wm8731_spi_driver);
820 	if (ret != 0) {
821 		printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
822 		       ret);
823 	}
824 #endif
825 	return ret;
826 }
827 module_init(wm8731_modinit);
828 
829 static void __exit wm8731_exit(void)
830 {
831 #if IS_ENABLED(CONFIG_I2C)
832 	i2c_del_driver(&wm8731_i2c_driver);
833 #endif
834 #if defined(CONFIG_SPI_MASTER)
835 	spi_unregister_driver(&wm8731_spi_driver);
836 #endif
837 }
838 module_exit(wm8731_exit);
839 
840 MODULE_DESCRIPTION("ASoC WM8731 driver");
841 MODULE_AUTHOR("Richard Purdie");
842 MODULE_LICENSE("GPL");
843