1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * wm8741.c  --  WM8741 ALSA SoC Audio driver
4 *
5 * Copyright 2010-1 Wolfson Microelectronics plc
6 *
7 * Author: Ian Lartey <ian@opensource.wolfsonmicro.com>
8 */
9
10#include <linux/module.h>
11#include <linux/moduleparam.h>
12#include <linux/init.h>
13#include <linux/delay.h>
14#include <linux/pm.h>
15#include <linux/i2c.h>
16#include <linux/spi/spi.h>
17#include <linux/of.h>
18#include <linux/regmap.h>
19#include <linux/regulator/consumer.h>
20#include <linux/slab.h>
21#include <sound/core.h>
22#include <sound/pcm.h>
23#include <sound/pcm_params.h>
24#include <sound/soc.h>
25#include <sound/initval.h>
26#include <sound/tlv.h>
27
28#include "wm8741.h"
29
30#define WM8741_NUM_SUPPLIES 2
31static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
32	"AVDD",
33	"DVDD",
34};
35
36/* codec private data */
37struct wm8741_priv {
38	struct wm8741_platform_data pdata;
39	struct regmap *regmap;
40	struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
41	unsigned int sysclk;
42	const struct snd_pcm_hw_constraint_list *sysclk_constraints;
43};
44
45static const struct reg_default wm8741_reg_defaults[] = {
46	{  0, 0x0000 },     /* R0  - DACLLSB Attenuation */
47	{  1, 0x0000 },     /* R1  - DACLMSB Attenuation */
48	{  2, 0x0000 },     /* R2  - DACRLSB Attenuation */
49	{  3, 0x0000 },     /* R3  - DACRMSB Attenuation */
50	{  4, 0x0000 },     /* R4  - Volume Control */
51	{  5, 0x000A },     /* R5  - Format Control */
52	{  6, 0x0000 },     /* R6  - Filter Control */
53	{  7, 0x0000 },     /* R7  - Mode Control 1 */
54	{  8, 0x0002 },     /* R8  - Mode Control 2 */
55	{ 32, 0x0002 },     /* R32 - ADDITONAL_CONTROL_1 */
56};
57
58static int wm8741_reset(struct snd_soc_component *component)
59{
60	return snd_soc_component_write(component, WM8741_RESET, 0);
61}
62
63static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
64static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
65
66static const struct snd_kcontrol_new wm8741_snd_controls_stereo[] = {
67SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
68		 WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
69SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
70		 WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
71};
72
73static const struct snd_kcontrol_new wm8741_snd_controls_mono_left[] = {
74SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
75		 1, 255, 1, dac_tlv_fine),
76SOC_SINGLE_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
77		 0, 511, 1, dac_tlv),
78};
79
80static const struct snd_kcontrol_new wm8741_snd_controls_mono_right[] = {
81SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACRLSB_ATTENUATION,
82		1, 255, 1, dac_tlv_fine),
83SOC_SINGLE_TLV("Playback Volume", WM8741_DACRMSB_ATTENUATION,
84		0, 511, 1, dac_tlv),
85};
86
87static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
88SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
89SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
90SND_SOC_DAPM_OUTPUT("VOUTLP"),
91SND_SOC_DAPM_OUTPUT("VOUTLN"),
92SND_SOC_DAPM_OUTPUT("VOUTRP"),
93SND_SOC_DAPM_OUTPUT("VOUTRN"),
94};
95
96static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
97	{ "VOUTLP", NULL, "DACL" },
98	{ "VOUTLN", NULL, "DACL" },
99	{ "VOUTRP", NULL, "DACR" },
100	{ "VOUTRN", NULL, "DACR" },
101};
102
103static const unsigned int rates_11289[] = {
104	44100, 88200,
105};
106
107static const struct snd_pcm_hw_constraint_list constraints_11289 = {
108	.count	= ARRAY_SIZE(rates_11289),
109	.list	= rates_11289,
110};
111
112static const unsigned int rates_12288[] = {
113	32000, 48000, 96000,
114};
115
116static const struct snd_pcm_hw_constraint_list constraints_12288 = {
117	.count	= ARRAY_SIZE(rates_12288),
118	.list	= rates_12288,
119};
120
121static const unsigned int rates_16384[] = {
122	32000,
123};
124
125static const struct snd_pcm_hw_constraint_list constraints_16384 = {
126	.count	= ARRAY_SIZE(rates_16384),
127	.list	= rates_16384,
128};
129
130static const unsigned int rates_16934[] = {
131	44100, 88200,
132};
133
134static const struct snd_pcm_hw_constraint_list constraints_16934 = {
135	.count	= ARRAY_SIZE(rates_16934),
136	.list	= rates_16934,
137};
138
139static const unsigned int rates_18432[] = {
140	48000, 96000,
141};
142
143static const struct snd_pcm_hw_constraint_list constraints_18432 = {
144	.count	= ARRAY_SIZE(rates_18432),
145	.list	= rates_18432,
146};
147
148static const unsigned int rates_22579[] = {
149	44100, 88200, 176400
150};
151
152static const struct snd_pcm_hw_constraint_list constraints_22579 = {
153	.count	= ARRAY_SIZE(rates_22579),
154	.list	= rates_22579,
155};
156
157static const unsigned int rates_24576[] = {
158	32000, 48000, 96000, 192000
159};
160
161static const struct snd_pcm_hw_constraint_list constraints_24576 = {
162	.count	= ARRAY_SIZE(rates_24576),
163	.list	= rates_24576,
164};
165
166static const unsigned int rates_36864[] = {
167	48000, 96000, 192000
168};
169
170static const struct snd_pcm_hw_constraint_list constraints_36864 = {
171	.count	= ARRAY_SIZE(rates_36864),
172	.list	= rates_36864,
173};
174
175static int wm8741_startup(struct snd_pcm_substream *substream,
176			  struct snd_soc_dai *dai)
177{
178	struct snd_soc_component *component = dai->component;
179	struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
180
181	if (wm8741->sysclk)
182		snd_pcm_hw_constraint_list(substream->runtime, 0,
183				SNDRV_PCM_HW_PARAM_RATE,
184				wm8741->sysclk_constraints);
185
186	return 0;
187}
188
189static int wm8741_hw_params(struct snd_pcm_substream *substream,
190			    struct snd_pcm_hw_params *params,
191			    struct snd_soc_dai *dai)
192{
193	struct snd_soc_component *component = dai->component;
194	struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
195	unsigned int iface, mode;
196	int i;
197
198	/* The set of sample rates that can be supported depends on the
199	 * MCLK supplied to the CODEC - enforce this.
200	 */
201	if (!wm8741->sysclk) {
202		dev_err(component->dev,
203			"No MCLK configured, call set_sysclk() on init or in hw_params\n");
204		return -EINVAL;
205	}
206
207	/* Find a supported LRCLK rate */
208	for (i = 0; i < wm8741->sysclk_constraints->count; i++) {
209		if (wm8741->sysclk_constraints->list[i] == params_rate(params))
210			break;
211	}
212
213	if (i == wm8741->sysclk_constraints->count) {
214		dev_err(component->dev, "LRCLK %d unsupported with MCLK %d\n",
215			params_rate(params), wm8741->sysclk);
216		return -EINVAL;
217	}
218
219	/* bit size */
220	switch (params_width(params)) {
221	case 16:
222		iface = 0x0;
223		break;
224	case 20:
225		iface = 0x1;
226		break;
227	case 24:
228		iface = 0x2;
229		break;
230	case 32:
231		iface = 0x3;
232		break;
233	default:
234		dev_dbg(component->dev, "wm8741_hw_params:    Unsupported bit size param = %d",
235			params_width(params));
236		return -EINVAL;
237	}
238
239	/* oversampling rate */
240	if (params_rate(params) > 96000)
241		mode = 0x40;
242	else if (params_rate(params) > 48000)
243		mode = 0x20;
244	else
245		mode = 0x00;
246
247	dev_dbg(component->dev, "wm8741_hw_params:    bit size param = %d, rate param = %d",
248		params_width(params), params_rate(params));
249
250	snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL, WM8741_IWL_MASK,
251			    iface);
252	snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_1, WM8741_OSR_MASK,
253			    mode);
254
255	return 0;
256}
257
258static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
259		int clk_id, unsigned int freq, int dir)
260{
261	struct snd_soc_component *component = codec_dai->component;
262	struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
263
264	dev_dbg(component->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
265
266	switch (freq) {
267	case 0:
268		wm8741->sysclk_constraints = NULL;
269		break;
270	case 11289600:
271		wm8741->sysclk_constraints = &constraints_11289;
272		break;
273	case 12288000:
274		wm8741->sysclk_constraints = &constraints_12288;
275		break;
276	case 16384000:
277		wm8741->sysclk_constraints = &constraints_16384;
278		break;
279	case 16934400:
280		wm8741->sysclk_constraints = &constraints_16934;
281		break;
282	case 18432000:
283		wm8741->sysclk_constraints = &constraints_18432;
284		break;
285	case 22579200:
286	case 33868800:
287		wm8741->sysclk_constraints = &constraints_22579;
288		break;
289	case 24576000:
290		wm8741->sysclk_constraints = &constraints_24576;
291		break;
292	case 36864000:
293		wm8741->sysclk_constraints = &constraints_36864;
294		break;
295	default:
296		return -EINVAL;
297	}
298
299	wm8741->sysclk = freq;
300	return 0;
301}
302
303static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
304		unsigned int fmt)
305{
306	struct snd_soc_component *component = codec_dai->component;
307	unsigned int iface;
308
309	/* check master/slave audio interface */
310	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
311	case SND_SOC_DAIFMT_CBS_CFS:
312		break;
313	default:
314		return -EINVAL;
315	}
316
317	/* interface format */
318	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
319	case SND_SOC_DAIFMT_I2S:
320		iface = 0x08;
321		break;
322	case SND_SOC_DAIFMT_RIGHT_J:
323		iface = 0x00;
324		break;
325	case SND_SOC_DAIFMT_LEFT_J:
326		iface = 0x04;
327		break;
328	case SND_SOC_DAIFMT_DSP_A:
329		iface = 0x0C;
330		break;
331	case SND_SOC_DAIFMT_DSP_B:
332		iface = 0x1C;
333		break;
334	default:
335		return -EINVAL;
336	}
337
338	/* clock inversion */
339	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
340	case SND_SOC_DAIFMT_NB_NF:
341		break;
342	case SND_SOC_DAIFMT_NB_IF:
343		iface |= 0x10;
344		break;
345	case SND_SOC_DAIFMT_IB_NF:
346		iface |= 0x20;
347		break;
348	case SND_SOC_DAIFMT_IB_IF:
349		iface |= 0x30;
350		break;
351	default:
352		return -EINVAL;
353	}
354
355
356	dev_dbg(component->dev, "wm8741_set_dai_fmt:    Format=%x, Clock Inv=%x\n",
357				fmt & SND_SOC_DAIFMT_FORMAT_MASK,
358				((fmt & SND_SOC_DAIFMT_INV_MASK)));
359
360	snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL,
361			    WM8741_BCP_MASK | WM8741_LRP_MASK | WM8741_FMT_MASK,
362			    iface);
363
364	return 0;
365}
366
367static int wm8741_mute(struct snd_soc_dai *codec_dai, int mute, int direction)
368{
369	struct snd_soc_component *component = codec_dai->component;
370
371	snd_soc_component_update_bits(component, WM8741_VOLUME_CONTROL,
372			WM8741_SOFT_MASK, !!mute << WM8741_SOFT_SHIFT);
373	return 0;
374}
375
376#define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
377			SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
378			SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
379			SNDRV_PCM_RATE_192000)
380
381#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
382			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
383
384static const struct snd_soc_dai_ops wm8741_dai_ops = {
385	.startup	= wm8741_startup,
386	.hw_params	= wm8741_hw_params,
387	.set_sysclk	= wm8741_set_dai_sysclk,
388	.set_fmt	= wm8741_set_dai_fmt,
389	.mute_stream	= wm8741_mute,
390	.no_capture_mute = 1,
391};
392
393static struct snd_soc_dai_driver wm8741_dai = {
394	.name = "wm8741",
395	.playback = {
396		.stream_name = "Playback",
397		.channels_min = 2,
398		.channels_max = 2,
399		.rates = WM8741_RATES,
400		.formats = WM8741_FORMATS,
401	},
402	.ops = &wm8741_dai_ops,
403};
404
405#ifdef CONFIG_PM
406static int wm8741_resume(struct snd_soc_component *component)
407{
408	snd_soc_component_cache_sync(component);
409	return 0;
410}
411#else
412#define wm8741_resume NULL
413#endif
414
415static int wm8741_configure(struct snd_soc_component *component)
416{
417	struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
418
419	/* Configure differential mode */
420	switch (wm8741->pdata.diff_mode) {
421	case WM8741_DIFF_MODE_STEREO:
422	case WM8741_DIFF_MODE_STEREO_REVERSED:
423	case WM8741_DIFF_MODE_MONO_LEFT:
424	case WM8741_DIFF_MODE_MONO_RIGHT:
425		snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_2,
426				WM8741_DIFF_MASK,
427				wm8741->pdata.diff_mode << WM8741_DIFF_SHIFT);
428		break;
429	default:
430		return -EINVAL;
431	}
432
433	/* Change some default settings - latch VU */
434	snd_soc_component_update_bits(component, WM8741_DACLLSB_ATTENUATION,
435			WM8741_UPDATELL, WM8741_UPDATELL);
436	snd_soc_component_update_bits(component, WM8741_DACLMSB_ATTENUATION,
437			WM8741_UPDATELM, WM8741_UPDATELM);
438	snd_soc_component_update_bits(component, WM8741_DACRLSB_ATTENUATION,
439			WM8741_UPDATERL, WM8741_UPDATERL);
440	snd_soc_component_update_bits(component, WM8741_DACRMSB_ATTENUATION,
441			WM8741_UPDATERM, WM8741_UPDATERM);
442
443	return 0;
444}
445
446static int wm8741_add_controls(struct snd_soc_component *component)
447{
448	struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
449
450	switch (wm8741->pdata.diff_mode) {
451	case WM8741_DIFF_MODE_STEREO:
452	case WM8741_DIFF_MODE_STEREO_REVERSED:
453		snd_soc_add_component_controls(component,
454				wm8741_snd_controls_stereo,
455				ARRAY_SIZE(wm8741_snd_controls_stereo));
456		break;
457	case WM8741_DIFF_MODE_MONO_LEFT:
458		snd_soc_add_component_controls(component,
459				wm8741_snd_controls_mono_left,
460				ARRAY_SIZE(wm8741_snd_controls_mono_left));
461		break;
462	case WM8741_DIFF_MODE_MONO_RIGHT:
463		snd_soc_add_component_controls(component,
464				wm8741_snd_controls_mono_right,
465				ARRAY_SIZE(wm8741_snd_controls_mono_right));
466		break;
467	default:
468		return -EINVAL;
469	}
470
471	return 0;
472}
473
474static int wm8741_probe(struct snd_soc_component *component)
475{
476	struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
477	int ret = 0;
478
479	ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
480				    wm8741->supplies);
481	if (ret != 0) {
482		dev_err(component->dev, "Failed to enable supplies: %d\n", ret);
483		goto err_get;
484	}
485
486	ret = wm8741_reset(component);
487	if (ret < 0) {
488		dev_err(component->dev, "Failed to issue reset\n");
489		goto err_enable;
490	}
491
492	ret = wm8741_configure(component);
493	if (ret < 0) {
494		dev_err(component->dev, "Failed to change default settings\n");
495		goto err_enable;
496	}
497
498	ret = wm8741_add_controls(component);
499	if (ret < 0) {
500		dev_err(component->dev, "Failed to add controls\n");
501		goto err_enable;
502	}
503
504	dev_dbg(component->dev, "Successful registration\n");
505	return ret;
506
507err_enable:
508	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
509err_get:
510	return ret;
511}
512
513static void wm8741_remove(struct snd_soc_component *component)
514{
515	struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
516
517	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
518}
519
520static const struct snd_soc_component_driver soc_component_dev_wm8741 = {
521	.probe			= wm8741_probe,
522	.remove			= wm8741_remove,
523	.resume			= wm8741_resume,
524	.dapm_widgets		= wm8741_dapm_widgets,
525	.num_dapm_widgets	= ARRAY_SIZE(wm8741_dapm_widgets),
526	.dapm_routes		= wm8741_dapm_routes,
527	.num_dapm_routes	= ARRAY_SIZE(wm8741_dapm_routes),
528	.idle_bias_on		= 1,
529	.use_pmdown_time	= 1,
530	.endianness		= 1,
531};
532
533static const struct of_device_id wm8741_of_match[] = {
534	{ .compatible = "wlf,wm8741", },
535	{ }
536};
537MODULE_DEVICE_TABLE(of, wm8741_of_match);
538
539static const struct regmap_config wm8741_regmap = {
540	.reg_bits = 7,
541	.val_bits = 9,
542	.max_register = WM8741_MAX_REGISTER,
543
544	.reg_defaults = wm8741_reg_defaults,
545	.num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults),
546	.cache_type = REGCACHE_MAPLE,
547};
548
549static int wm8741_set_pdata(struct device *dev, struct wm8741_priv *wm8741)
550{
551	const struct wm8741_platform_data *pdata = dev_get_platdata(dev);
552	u32 diff_mode;
553
554	if (dev->of_node) {
555		if (of_property_read_u32(dev->of_node, "diff-mode", &diff_mode)
556				>= 0)
557			wm8741->pdata.diff_mode = diff_mode;
558	} else {
559		if (pdata != NULL)
560			memcpy(&wm8741->pdata, pdata, sizeof(wm8741->pdata));
561	}
562
563	return 0;
564}
565
566#if IS_ENABLED(CONFIG_I2C)
567static int wm8741_i2c_probe(struct i2c_client *i2c)
568{
569	struct wm8741_priv *wm8741;
570	int ret, i;
571
572	wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
573			      GFP_KERNEL);
574	if (wm8741 == NULL)
575		return -ENOMEM;
576
577	for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
578		wm8741->supplies[i].supply = wm8741_supply_names[i];
579
580	ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
581				      wm8741->supplies);
582	if (ret != 0) {
583		dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
584		return ret;
585	}
586
587	wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap);
588	if (IS_ERR(wm8741->regmap)) {
589		ret = PTR_ERR(wm8741->regmap);
590		dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
591		return ret;
592	}
593
594	ret = wm8741_set_pdata(&i2c->dev, wm8741);
595	if (ret != 0) {
596		dev_err(&i2c->dev, "Failed to set pdata: %d\n", ret);
597		return ret;
598	}
599
600	i2c_set_clientdata(i2c, wm8741);
601
602	ret = devm_snd_soc_register_component(&i2c->dev,
603				     &soc_component_dev_wm8741, &wm8741_dai, 1);
604
605	return ret;
606}
607
608static const struct i2c_device_id wm8741_i2c_id[] = {
609	{ "wm8741", 0 },
610	{ }
611};
612MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
613
614static struct i2c_driver wm8741_i2c_driver = {
615	.driver = {
616		.name = "wm8741",
617		.of_match_table = wm8741_of_match,
618	},
619	.probe = wm8741_i2c_probe,
620	.id_table = wm8741_i2c_id,
621};
622#endif
623
624#if defined(CONFIG_SPI_MASTER)
625static int wm8741_spi_probe(struct spi_device *spi)
626{
627	struct wm8741_priv *wm8741;
628	int ret, i;
629
630	wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
631			     GFP_KERNEL);
632	if (wm8741 == NULL)
633		return -ENOMEM;
634
635	for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
636		wm8741->supplies[i].supply = wm8741_supply_names[i];
637
638	ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies),
639				      wm8741->supplies);
640	if (ret != 0) {
641		dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
642		return ret;
643	}
644
645	wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap);
646	if (IS_ERR(wm8741->regmap)) {
647		ret = PTR_ERR(wm8741->regmap);
648		dev_err(&spi->dev, "Failed to init regmap: %d\n", ret);
649		return ret;
650	}
651
652	ret = wm8741_set_pdata(&spi->dev, wm8741);
653	if (ret != 0) {
654		dev_err(&spi->dev, "Failed to set pdata: %d\n", ret);
655		return ret;
656	}
657
658	spi_set_drvdata(spi, wm8741);
659
660	ret = devm_snd_soc_register_component(&spi->dev,
661			&soc_component_dev_wm8741, &wm8741_dai, 1);
662	return ret;
663}
664
665static struct spi_driver wm8741_spi_driver = {
666	.driver = {
667		.name	= "wm8741",
668		.of_match_table = wm8741_of_match,
669	},
670	.probe		= wm8741_spi_probe,
671};
672#endif /* CONFIG_SPI_MASTER */
673
674static int __init wm8741_modinit(void)
675{
676	int ret = 0;
677
678#if IS_ENABLED(CONFIG_I2C)
679	ret = i2c_add_driver(&wm8741_i2c_driver);
680	if (ret != 0)
681		pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
682#endif
683#if defined(CONFIG_SPI_MASTER)
684	ret = spi_register_driver(&wm8741_spi_driver);
685	if (ret != 0) {
686		printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
687		       ret);
688	}
689#endif
690
691	return ret;
692}
693module_init(wm8741_modinit);
694
695static void __exit wm8741_exit(void)
696{
697#if defined(CONFIG_SPI_MASTER)
698	spi_unregister_driver(&wm8741_spi_driver);
699#endif
700#if IS_ENABLED(CONFIG_I2C)
701	i2c_del_driver(&wm8741_i2c_driver);
702#endif
703}
704module_exit(wm8741_exit);
705
706MODULE_DESCRIPTION("ASoC WM8741 driver");
707MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
708MODULE_LICENSE("GPL");
709