summaryrefslogtreecommitdiffstats
path: root/sound/soc/codecs/ak4613.c
blob: 690edebf029eb53c213ace00c88e39b14c6b3d75 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
/*
 * ak4613.c  --  Asahi Kasei ALSA Soc Audio driver
 *
 * Copyright (C) 2015 Renesas Electronics Corporation
 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 *
 * Based on ak4642.c by Kuninori Morimoto
 * Based on wm8731.c by Richard Purdie
 * Based on ak4535.c by Richard Purdie
 * Based on wm8753.c by Liam Girdwood
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/clk.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/of_device.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>
#include <sound/tlv.h>

#define PW_MGMT1	0x00 /* Power Management 1 */
#define PW_MGMT2	0x01 /* Power Management 2 */
#define PW_MGMT3	0x02 /* Power Management 3 */
#define CTRL1		0x03 /* Control 1 */
#define CTRL2		0x04 /* Control 2 */
#define DEMP1		0x05 /* De-emphasis1 */
#define DEMP2		0x06 /* De-emphasis2 */
#define OFD		0x07 /* Overflow Detect */
#define ZRD		0x08 /* Zero Detect */
#define ICTRL		0x09 /* Input Control */
#define OCTRL		0x0a /* Output Control */
#define LOUT1		0x0b /* LOUT1 Volume Control */
#define ROUT1		0x0c /* ROUT1 Volume Control */
#define LOUT2		0x0d /* LOUT2 Volume Control */
#define ROUT2		0x0e /* ROUT2 Volume Control */
#define LOUT3		0x0f /* LOUT3 Volume Control */
#define ROUT3		0x10 /* ROUT3 Volume Control */
#define LOUT4		0x11 /* LOUT4 Volume Control */
#define ROUT4		0x12 /* ROUT4 Volume Control */
#define LOUT5		0x13 /* LOUT5 Volume Control */
#define ROUT5		0x14 /* ROUT5 Volume Control */
#define LOUT6		0x15 /* LOUT6 Volume Control */
#define ROUT6		0x16 /* ROUT6 Volume Control */

/* PW_MGMT1 */
#define RSTN		BIT(0)
#define PMDAC		BIT(1)
#define PMADC		BIT(2)
#define PMVR		BIT(3)

/* PW_MGMT2 */
#define PMAD_ALL	0x7

/* PW_MGMT3 */
#define PMDA_ALL	0x3f

/* CTRL1 */
#define DIF0		BIT(3)
#define DIF1		BIT(4)
#define DIF2		BIT(5)
#define TDM0		BIT(6)
#define TDM1		BIT(7)
#define NO_FMT		(0xff)
#define FMT_MASK	(0xf8)

/* CTRL2 */
#define DFS_MASK		(3 << 2)
#define DFS_NORMAL_SPEED	(0 << 2)
#define DFS_DOUBLE_SPEED	(1 << 2)
#define DFS_QUAD_SPEED		(2 << 2)

/* ICTRL */
#define ICTRL_MASK	(0x3)

/* OCTRL */
#define OCTRL_MASK	(0x3F)

struct ak4613_formats {
	unsigned int width;
	unsigned int fmt;
};

struct ak4613_interface {
	struct ak4613_formats capture;
	struct ak4613_formats playback;
};

struct ak4613_priv {
	struct mutex lock;
	const struct ak4613_interface *iface;
	struct snd_pcm_hw_constraint_list constraint;
	unsigned int sysclk;

	unsigned int fmt;
	u8 oc;
	u8 ic;
	int cnt;
};

/*
 * Playback Volume
 *
 * max : 0x00 : 0 dB
 *       ( 0.5 dB step )
 * min : 0xFE : -127.0 dB
 * mute: 0xFF
 */
static const DECLARE_TLV_DB_SCALE(out_tlv, -12750, 50, 1);

static const struct snd_kcontrol_new ak4613_snd_controls[] = {
	SOC_DOUBLE_R_TLV("Digital Playback Volume1", LOUT1, ROUT1,
			 0, 0xFF, 1, out_tlv),
	SOC_DOUBLE_R_TLV("Digital Playback Volume2", LOUT2, ROUT2,
			 0, 0xFF, 1, out_tlv),
	SOC_DOUBLE_R_TLV("Digital Playback Volume3", LOUT3, ROUT3,
			 0, 0xFF, 1, out_tlv),
	SOC_DOUBLE_R_TLV("Digital Playback Volume4", LOUT4, ROUT4,
			 0, 0xFF, 1, out_tlv),
	SOC_DOUBLE_R_TLV("Digital Playback Volume5", LOUT5, ROUT5,
			 0, 0xFF, 1, out_tlv),
	SOC_DOUBLE_R_TLV("Digital Playback Volume6", LOUT6, ROUT6,
			 0, 0xFF, 1, out_tlv),
};

static const struct reg_default ak4613_reg[] = {
	{ 0x0,  0x0f }, { 0x1,  0x07 }, { 0x2,  0x3f }, { 0x3,  0x20 },
	{ 0x4,  0x20 }, { 0x5,  0x55 }, { 0x6,  0x05 }, { 0x7,  0x07 },
	{ 0x8,  0x0f }, { 0x9,  0x07 }, { 0xa,  0x3f }, { 0xb,  0x00 },
	{ 0xc,  0x00 }, { 0xd,  0x00 }, { 0xe,  0x00 }, { 0xf,  0x00 },
	{ 0x10, 0x00 }, { 0x11, 0x00 }, { 0x12, 0x00 }, { 0x13, 0x00 },
	{ 0x14, 0x00 }, { 0x15, 0x00 }, { 0x16, 0x00 },
};

#define AUDIO_IFACE_TO_VAL(fmts) ((fmts - ak4613_iface) << 3)
#define AUDIO_IFACE(b, fmt) { b, SND_SOC_DAIFMT_##fmt }
static const struct ak4613_interface ak4613_iface[] = {
	/* capture */				/* playback */
	/* [0] - [2] are not supported */
	[3] = {	AUDIO_IFACE(24, LEFT_J),	AUDIO_IFACE(24, LEFT_J) },
	[4] = {	AUDIO_IFACE(24, I2S),		AUDIO_IFACE(24, I2S) },
};

static const struct regmap_config ak4613_regmap_cfg = {
	.reg_bits		= 8,
	.val_bits		= 8,
	.max_register		= 0x16,
	.reg_defaults		= ak4613_reg,
	.num_reg_defaults	= ARRAY_SIZE(ak4613_reg),
	.cache_type		= REGCACHE_RBTREE,
};

static const struct of_device_id ak4613_of_match[] = {
	{ .compatible = "asahi-kasei,ak4613",	.data = &ak4613_regmap_cfg },
	{},
};
MODULE_DEVICE_TABLE(of, ak4613_of_match);

static const struct i2c_device_id ak4613_i2c_id[] = {
	{ "ak4613", (kernel_ulong_t)&ak4613_regmap_cfg },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ak4613_i2c_id);

static const struct snd_soc_dapm_widget ak4613_dapm_widgets[] = {

	/* Outputs */
	SND_SOC_DAPM_OUTPUT("LOUT1"),
	SND_SOC_DAPM_OUTPUT("LOUT2"),
	SND_SOC_DAPM_OUTPUT("LOUT3"),
	SND_SOC_DAPM_OUTPUT("LOUT4"),
	SND_SOC_DAPM_OUTPUT("LOUT5"),
	SND_SOC_DAPM_OUTPUT("LOUT6"),

	SND_SOC_DAPM_OUTPUT("ROUT1"),
	SND_SOC_DAPM_OUTPUT("ROUT2"),
	SND_SOC_DAPM_OUTPUT("ROUT3"),
	SND_SOC_DAPM_OUTPUT("ROUT4"),
	SND_SOC_DAPM_OUTPUT("ROUT5"),
	SND_SOC_DAPM_OUTPUT("ROUT6"),

	/* Inputs */
	SND_SOC_DAPM_INPUT("LIN1"),
	SND_SOC_DAPM_INPUT("LIN2"),

	SND_SOC_DAPM_INPUT("RIN1"),
	SND_SOC_DAPM_INPUT("RIN2"),

	/* DAC */
	SND_SOC_DAPM_DAC("DAC1", NULL, PW_MGMT3, 0, 0),
	SND_SOC_DAPM_DAC("DAC2", NULL, PW_MGMT3, 1, 0),
	SND_SOC_DAPM_DAC("DAC3", NULL, PW_MGMT3, 2, 0),
	SND_SOC_DAPM_DAC("DAC4", NULL, PW_MGMT3, 3, 0),
	SND_SOC_DAPM_DAC("DAC5", NULL, PW_MGMT3, 4, 0),
	SND_SOC_DAPM_DAC("DAC6", NULL, PW_MGMT3, 5, 0),

	/* ADC */
	SND_SOC_DAPM_ADC("ADC1", NULL, PW_MGMT2, 0, 0),
	SND_SOC_DAPM_ADC("ADC2", NULL, PW_MGMT2, 1, 0),
};

static const struct snd_soc_dapm_route ak4613_intercon[] = {
	{"LOUT1", NULL, "DAC1"},
	{"LOUT2", NULL, "DAC2"},
	{"LOUT3", NULL, "DAC3"},
	{"LOUT4", NULL, "DAC4"},
	{"LOUT5", NULL, "DAC5"},
	{"LOUT6", NULL, "DAC6"},

	{"ROUT1", NULL, "DAC1"},
	{"ROUT2", NULL, "DAC2"},
	{"ROUT3", NULL, "DAC3"},
	{"ROUT4", NULL, "DAC4"},
	{"ROUT5", NULL, "DAC5"},
	{"ROUT6", NULL, "DAC6"},

	{"DAC1", NULL, "Playback"},
	{"DAC2", NULL, "Playback"},
	{"DAC3", NULL, "Playback"},
	{"DAC4", NULL, "Playback"},
	{"DAC5", NULL, "Playback"},
	{"DAC6", NULL, "Playback"},

	{"Capture", NULL, "ADC1"},
	{"Capture", NULL, "ADC2"},

	{"ADC1", NULL, "LIN1"},
	{"ADC2", NULL, "LIN2"},

	{"ADC1", NULL, "RIN1"},
	{"ADC2", NULL, "RIN2"},
};

static void ak4613_dai_shutdown(struct snd_pcm_substream *substream,
			       struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct ak4613_priv *priv = snd_soc_codec_get_drvdata(codec);
	struct device *dev = codec->dev;

	mutex_lock(&priv->lock);
	priv->cnt--;
	if (priv->cnt < 0) {
		dev_err(dev, "unexpected counter error\n");
		priv->cnt = 0;
	}
	if (!priv->cnt)
		priv->iface = NULL;
	mutex_unlock(&priv->lock);
}

static void ak4613_hw_constraints(struct ak4613_priv *priv,
				  struct snd_pcm_runtime *runtime)
{
	static const unsigned int ak4613_rates[] = {
		 32000,
		 44100,
		 48000,
		 64000,
		 88200,
		 96000,
		176400,
		192000,
	};
	struct snd_pcm_hw_constraint_list *constraint = &priv->constraint;
	unsigned int fs;
	int i;

	constraint->list	= ak4613_rates;
	constraint->mask	= 0;
	constraint->count	= 0;

	/*
	 * Slave Mode
	 *	Normal: [32kHz, 48kHz] : 256fs,384fs or 512fs
	 *	Double: [64kHz, 96kHz] : 256fs
	 *	Quad  : [128kHz,192kHz]: 128fs
	 *
	 * Master mode
	 *	Normal: [32kHz, 48kHz] : 256fs or 512fs
	 *	Double: [64kHz, 96kHz] : 256fs
	 *	Quad  : [128kHz,192kHz]: 128fs
	*/
	for (i = 0; i < ARRAY_SIZE(ak4613_rates); i++) {
		/* minimum fs on each range */
		fs = (ak4613_rates[i] <= 96000) ? 256 : 128;

		if (priv->sysclk >= ak4613_rates[i] * fs)
			constraint->count = i + 1;
	}

	snd_pcm_hw_constraint_list(runtime, 0,
				SNDRV_PCM_HW_PARAM_RATE, constraint);
}

static int ak4613_dai_startup(struct snd_pcm_substream *substream,
			      struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct ak4613_priv *priv = snd_soc_codec_get_drvdata(codec);

	priv->cnt++;

	ak4613_hw_constraints(priv, substream->runtime);

	return 0;
}

static int ak4613_dai_set_sysclk(struct snd_soc_dai *codec_dai,
				 int clk_id, unsigned int freq, int dir)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct ak4613_priv *priv = snd_soc_codec_get_drvdata(codec);

	priv->sysclk = freq;

	return 0;
}

static int ak4613_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
	struct snd_soc_codec *codec = dai->codec;
	struct ak4613_priv *priv = snd_soc_codec_get_drvdata(codec);

	fmt &= SND_SOC_DAIFMT_FORMAT_MASK;

	switch (fmt) {
	case SND_SOC_DAIFMT_LEFT_J:
	case SND_SOC_DAIFMT_I2S:
		priv->fmt = fmt;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static bool ak4613_dai_fmt_matching(const struct ak4613_interface *iface,
				    int is_play,
				    unsigned int fmt, unsigned int width)
{
	const struct ak4613_formats *fmts;

	fmts = (is_play) ? &iface->playback : &iface->capture;

	if (fmts->fmt != fmt)
		return false;

	if (fmts->width != width)
		return false;

	return true;
}

static int ak4613_dai_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params,
				struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct ak4613_priv *priv = snd_soc_codec_get_drvdata(codec);
	const struct ak4613_interface *iface;
	struct device *dev = codec->dev;
	unsigned int width = params_width(params);
	unsigned int fmt = priv->fmt;
	unsigned int rate;
	int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
	int i, ret;
	u8 fmt_ctrl, ctrl2;

	rate = params_rate(params);
	switch (rate) {
	case 32000:
	case 44100:
	case 48000:
		ctrl2 = DFS_NORMAL_SPEED;
		break;
	case 64000:
	case 88200:
	case 96000:
		ctrl2 = DFS_DOUBLE_SPEED;
		break;
	case 176400:
	case 192000:
		ctrl2 = DFS_QUAD_SPEED;
		break;
	default:
		return -EINVAL;
	}

	/*
	 * FIXME
	 *
	 * It doesn't support TDM at this point
	 */
	fmt_ctrl = NO_FMT;
	ret = -EINVAL;
	iface = NULL;

	mutex_lock(&priv->lock);
	if (priv->iface) {
		if (ak4613_dai_fmt_matching(priv->iface, is_play, fmt, width))
			iface = priv->iface;
	} else {
		for (i = ARRAY_SIZE(ak4613_iface) - 1; i >= 0; i--) {
			if (!ak4613_dai_fmt_matching(ak4613_iface + i,
						     is_play,
						     fmt, width))
				continue;
			iface = ak4613_iface + i;
			break;
		}
	}

	if ((priv->iface == NULL) ||
	    (priv->iface == iface)) {
		priv->iface = iface;
		ret = 0;
	}
	mutex_unlock(&priv->lock);

	if (ret < 0)
		goto hw_params_end;

	fmt_ctrl = AUDIO_IFACE_TO_VAL(iface);

	snd_soc_update_bits(codec, CTRL1, FMT_MASK, fmt_ctrl);
	snd_soc_update_bits(codec, CTRL2, DFS_MASK, ctrl2);

	snd_soc_update_bits(codec, ICTRL, ICTRL_MASK, priv->ic);
	snd_soc_update_bits(codec, OCTRL, OCTRL_MASK, priv->oc);

hw_params_end:
	if (ret < 0)
		dev_warn(dev, "unsupported data width/format combination\n");

	return ret;
}

static int ak4613_set_bias_level(struct snd_soc_codec *codec,
				 enum snd_soc_bias_level level)
{
	u8 mgmt1 = 0;

	switch (level) {
	case SND_SOC_BIAS_ON:
		mgmt1 |= RSTN;
		/* fall through */
	case SND_SOC_BIAS_PREPARE:
		mgmt1 |= PMADC | PMDAC;
		/* fall through */
	case SND_SOC_BIAS_STANDBY:
		mgmt1 |= PMVR;
		/* fall through */
	case SND_SOC_BIAS_OFF:
	default:
		break;
	}

	snd_soc_write(codec, PW_MGMT1, mgmt1);

	return 0;
}

static const struct snd_soc_dai_ops ak4613_dai_ops = {
	.startup	= ak4613_dai_startup,
	.shutdown	= ak4613_dai_shutdown,
	.set_sysclk	= ak4613_dai_set_sysclk,
	.set_fmt	= ak4613_dai_set_fmt,
	.hw_params	= ak4613_dai_hw_params,
};

#define AK4613_PCM_RATE		(SNDRV_PCM_RATE_32000  |\
				 SNDRV_PCM_RATE_44100  |\
				 SNDRV_PCM_RATE_48000  |\
				 SNDRV_PCM_RATE_64000  |\
				 SNDRV_PCM_RATE_88200  |\
				 SNDRV_PCM_RATE_96000  |\
				 SNDRV_PCM_RATE_176400 |\
				 SNDRV_PCM_RATE_192000)
#define AK4613_PCM_FMTBIT	(SNDRV_PCM_FMTBIT_S24_LE)

static struct snd_soc_dai_driver ak4613_dai = {
	.name = "ak4613-hifi",
	.playback = {
		.stream_name	= "Playback",
		.channels_min	= 2,
		.channels_max	= 2,
		.rates		= AK4613_PCM_RATE,
		.formats	= AK4613_PCM_FMTBIT,
	},
	.capture = {
		.stream_name	= "Capture",
		.channels_min	= 2,
		.channels_max	= 2,
		.rates		= AK4613_PCM_RATE,
		.formats	= AK4613_PCM_FMTBIT,
	},
	.ops = &ak4613_dai_ops,
	.symmetric_rates = 1,
};

static int ak4613_suspend(struct snd_soc_codec *codec)
{
	struct regmap *regmap = dev_get_regmap(codec->dev, NULL);

	regcache_cache_only(regmap, true);
	regcache_mark_dirty(regmap);
	return 0;
}

static int ak4613_resume(struct snd_soc_codec *codec)
{
	struct regmap *regmap = dev_get_regmap(codec->dev, NULL);

	regcache_cache_only(regmap, false);
	return regcache_sync(regmap);
}

static struct snd_soc_codec_driver soc_codec_dev_ak4613 = {
	.suspend		= ak4613_suspend,
	.resume			= ak4613_resume,
	.set_bias_level		= ak4613_set_bias_level,
	.component_driver = {
		.controls		= ak4613_snd_controls,
		.num_controls		= ARRAY_SIZE(ak4613_snd_controls),
		.dapm_widgets		= ak4613_dapm_widgets,
		.num_dapm_widgets	= ARRAY_SIZE(ak4613_dapm_widgets),
		.dapm_routes		= ak4613_intercon,
		.num_dapm_routes	= ARRAY_SIZE(ak4613_intercon),
	},
};

static void ak4613_parse_of(struct ak4613_priv *priv,
			    struct device *dev)
{
	struct device_node *np = dev->of_node;
	char prop[32];
	int i;

	/* Input 1 - 2 */
	for (i = 0; i < 2; i++) {
		snprintf(prop, sizeof(prop), "asahi-kasei,in%d-single-end", i + 1);
		if (!of_get_property(np, prop, NULL))
			priv->ic |= 1 << i;
	}

	/* Output 1 - 6 */
	for (i = 0; i < 6; i++) {
		snprintf(prop, sizeof(prop), "asahi-kasei,out%d-single-end", i + 1);
		if (!of_get_property(np, prop, NULL))
			priv->oc |= 1 << i;
	}
}

static int ak4613_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct device *dev = &i2c->dev;
	struct device_node *np = dev->of_node;
	const struct regmap_config *regmap_cfg;
	struct regmap *regmap;
	struct ak4613_priv *priv;

	regmap_cfg = NULL;
	if (np) {
		const struct of_device_id *of_id;

		of_id = of_match_device(ak4613_of_match, dev);
		if (of_id)
			regmap_cfg = of_id->data;
	} else {
		regmap_cfg = (const struct regmap_config *)id->driver_data;
	}

	if (!regmap_cfg)
		return -EINVAL;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	ak4613_parse_of(priv, dev);

	priv->iface		= NULL;
	priv->cnt		= 0;
	priv->sysclk		= 0;

	mutex_init(&priv->lock);

	i2c_set_clientdata(i2c, priv);

	regmap = devm_regmap_init_i2c(i2c, regmap_cfg);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);

	return snd_soc_register_codec(dev, &soc_codec_dev_ak4613,
				      &ak4613_dai, 1);
}

static int ak4613_i2c_remove(struct i2c_client *client)
{
	snd_soc_unregister_codec(&client->dev);
	return 0;
}

static struct i2c_driver ak4613_i2c_driver = {
	.driver = {
		.name = "ak4613-codec",
		.of_match_table = ak4613_of_match,
	},
	.probe		= ak4613_i2c_probe,
	.remove		= ak4613_i2c_remove,
	.id_table	= ak4613_i2c_id,
};

module_i2c_driver(ak4613_i2c_driver);

MODULE_DESCRIPTION("Soc AK4613 driver");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
MODULE_LICENSE("GPL v2");