summaryrefslogtreecommitdiff
path: root/sound/soc/codecs/tas5720.c
blob: f54fb46b77c2f767896a6fb7b7b2ca7bf3c16598 (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
/*
 * tas5720.c - ALSA SoC Texas Instruments TAS5720 Mono Audio Amplifier
 *
 * Copyright (C)2015-2016 Texas Instruments Incorporated -  http://www.ti.com
 *
 * Author: Andreas Dannenberg <dannenberg@ti.com>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/regulator/consumer.h>
#include <linux/delay.h>

#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/tlv.h>

#include "tas5720.h"

/* Define how often to check (and clear) the fault status register (in ms) */
#define TAS5720_FAULT_CHECK_INTERVAL		200

static const char * const tas5720_supply_names[] = {
	"dvdd",		/* Digital power supply. Connect to 3.3-V supply. */
	"pvdd",		/* Class-D amp and analog power supply (connected). */
};

#define TAS5720_NUM_SUPPLIES	ARRAY_SIZE(tas5720_supply_names)

struct tas5720_data {
	struct snd_soc_codec *codec;
	struct regmap *regmap;
	struct i2c_client *tas5720_client;
	struct regulator_bulk_data supplies[TAS5720_NUM_SUPPLIES];
	struct delayed_work fault_check_work;
	unsigned int last_fault;
};

static int tas5720_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;
	unsigned int rate = params_rate(params);
	bool ssz_ds;
	int ret;

	switch (rate) {
	case 44100:
	case 48000:
		ssz_ds = false;
		break;
	case 88200:
	case 96000:
		ssz_ds = true;
		break;
	default:
		dev_err(codec->dev, "unsupported sample rate: %u\n", rate);
		return -EINVAL;
	}

	ret = snd_soc_update_bits(codec, TAS5720_DIGITAL_CTRL1_REG,
				  TAS5720_SSZ_DS, ssz_ds);
	if (ret < 0) {
		dev_err(codec->dev, "error setting sample rate: %d\n", ret);
		return ret;
	}

	return 0;
}

static int tas5720_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
	struct snd_soc_codec *codec = dai->codec;
	u8 serial_format;
	int ret;

	if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
		dev_vdbg(codec->dev, "DAI Format master is not found\n");
		return -EINVAL;
	}

	switch (fmt & (SND_SOC_DAIFMT_FORMAT_MASK |
		       SND_SOC_DAIFMT_INV_MASK)) {
	case (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF):
		/* 1st data bit occur one BCLK cycle after the frame sync */
		serial_format = TAS5720_SAIF_I2S;
		break;
	case (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF):
		/*
		 * Note that although the TAS5720 does not have a dedicated DSP
		 * mode it doesn't care about the LRCLK duty cycle during TDM
		 * operation. Therefore we can use the device's I2S mode with
		 * its delaying of the 1st data bit to receive DSP_A formatted
		 * data. See device datasheet for additional details.
		 */
		serial_format = TAS5720_SAIF_I2S;
		break;
	case (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF):
		/*
		 * Similar to DSP_A, we can use the fact that the TAS5720 does
		 * not care about the LRCLK duty cycle during TDM to receive
		 * DSP_B formatted data in LEFTJ mode (no delaying of the 1st
		 * data bit).
		 */
		serial_format = TAS5720_SAIF_LEFTJ;
		break;
	case (SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF):
		/* No delay after the frame sync */
		serial_format = TAS5720_SAIF_LEFTJ;
		break;
	default:
		dev_vdbg(codec->dev, "DAI Format is not found\n");
		return -EINVAL;
	}

	ret = snd_soc_update_bits(codec, TAS5720_DIGITAL_CTRL1_REG,
				  TAS5720_SAIF_FORMAT_MASK,
				  serial_format);
	if (ret < 0) {
		dev_err(codec->dev, "error setting SAIF format: %d\n", ret);
		return ret;
	}

	return 0;
}

static int tas5720_set_dai_tdm_slot(struct snd_soc_dai *dai,
				    unsigned int tx_mask, unsigned int rx_mask,
				    int slots, int slot_width)
{
	struct snd_soc_codec *codec = dai->codec;
	unsigned int first_slot;
	int ret;

	if (!tx_mask) {
		dev_err(codec->dev, "tx masks must not be 0\n");
		return -EINVAL;
	}

	/*
	 * Determine the first slot that is being requested. We will only
	 * use the first slot that is found since the TAS5720 is a mono
	 * amplifier.
	 */
	first_slot = __ffs(tx_mask);

	if (first_slot > 7) {
		dev_err(codec->dev, "slot selection out of bounds (%u)\n",
			first_slot);
		return -EINVAL;
	}

	/* Enable manual TDM slot selection (instead of I2C ID based) */
	ret = snd_soc_update_bits(codec, TAS5720_DIGITAL_CTRL1_REG,
				  TAS5720_TDM_CFG_SRC, TAS5720_TDM_CFG_SRC);
	if (ret < 0)
		goto error_snd_soc_update_bits;

	/* Configure the TDM slot to process audio from */
	ret = snd_soc_update_bits(codec, TAS5720_DIGITAL_CTRL2_REG,
				  TAS5720_TDM_SLOT_SEL_MASK, first_slot);
	if (ret < 0)
		goto error_snd_soc_update_bits;

	return 0;

error_snd_soc_update_bits:
	dev_err(codec->dev, "error configuring TDM mode: %d\n", ret);
	return ret;
}

static int tas5720_mute(struct snd_soc_dai *dai, int mute)
{
	struct snd_soc_codec *codec = dai->codec;
	int ret;

	ret = snd_soc_update_bits(codec, TAS5720_DIGITAL_CTRL2_REG,
				  TAS5720_MUTE, mute ? TAS5720_MUTE : 0);
	if (ret < 0) {
		dev_err(codec->dev, "error (un-)muting device: %d\n", ret);
		return ret;
	}

	return 0;
}

static void tas5720_fault_check_work(struct work_struct *work)
{
	struct tas5720_data *tas5720 = container_of(work, struct tas5720_data,
			fault_check_work.work);
	struct device *dev = tas5720->codec->dev;
	unsigned int curr_fault;
	int ret;

	ret = regmap_read(tas5720->regmap, TAS5720_FAULT_REG, &curr_fault);
	if (ret < 0) {
		dev_err(dev, "failed to read FAULT register: %d\n", ret);
		goto out;
	}

	/* Check/handle all errors except SAIF clock errors */
	curr_fault &= TAS5720_OCE | TAS5720_DCE | TAS5720_OTE;

	/*
	 * Only flag errors once for a given occurrence. This is needed as
	 * the TAS5720 will take time clearing the fault condition internally
	 * during which we don't want to bombard the system with the same
	 * error message over and over.
	 */
	if ((curr_fault & TAS5720_OCE) && !(tas5720->last_fault & TAS5720_OCE))
		dev_crit(dev, "experienced an over current hardware fault\n");

	if ((curr_fault & TAS5720_DCE) && !(tas5720->last_fault & TAS5720_DCE))
		dev_crit(dev, "experienced a DC detection fault\n");

	if ((curr_fault & TAS5720_OTE) && !(tas5720->last_fault & TAS5720_OTE))
		dev_crit(dev, "experienced an over temperature fault\n");

	/* Store current fault value so we can detect any changes next time */
	tas5720->last_fault = curr_fault;

	if (!curr_fault)
		goto out;

	/*
	 * Periodically toggle SDZ (shutdown bit) H->L->H to clear any latching
	 * faults as long as a fault condition persists. Always going through
	 * the full sequence no matter the first return value to minimizes
	 * chances for the device to end up in shutdown mode.
	 */
	ret = regmap_write_bits(tas5720->regmap, TAS5720_POWER_CTRL_REG,
				TAS5720_SDZ, 0);
	if (ret < 0)
		dev_err(dev, "failed to write POWER_CTRL register: %d\n", ret);

	ret = regmap_write_bits(tas5720->regmap, TAS5720_POWER_CTRL_REG,
				TAS5720_SDZ, TAS5720_SDZ);
	if (ret < 0)
		dev_err(dev, "failed to write POWER_CTRL register: %d\n", ret);

out:
	/* Schedule the next fault check at the specified interval */
	schedule_delayed_work(&tas5720->fault_check_work,
			      msecs_to_jiffies(TAS5720_FAULT_CHECK_INTERVAL));
}

static int tas5720_codec_probe(struct snd_soc_codec *codec)
{
	struct tas5720_data *tas5720 = snd_soc_codec_get_drvdata(codec);
	unsigned int device_id;
	int ret;

	tas5720->codec = codec;

	ret = regulator_bulk_enable(ARRAY_SIZE(tas5720->supplies),
				    tas5720->supplies);
	if (ret != 0) {
		dev_err(codec->dev, "failed to enable supplies: %d\n", ret);
		return ret;
	}

	ret = regmap_read(tas5720->regmap, TAS5720_DEVICE_ID_REG, &device_id);
	if (ret < 0) {
		dev_err(codec->dev, "failed to read device ID register: %d\n",
			ret);
		goto probe_fail;
	}

	if (device_id != TAS5720_DEVICE_ID) {
		dev_err(codec->dev, "wrong device ID. expected: %u read: %u\n",
			TAS5720_DEVICE_ID, device_id);
		ret = -ENODEV;
		goto probe_fail;
	}

	/* Set device to mute */
	ret = snd_soc_update_bits(codec, TAS5720_DIGITAL_CTRL2_REG,
				  TAS5720_MUTE, TAS5720_MUTE);
	if (ret < 0)
		goto error_snd_soc_update_bits;

	/*
	 * Enter shutdown mode - our default when not playing audio - to
	 * minimize current consumption. On the TAS5720 there is no real down
	 * side doing so as all device registers are preserved and the wakeup
	 * of the codec is rather quick which we do using a dapm widget.
	 */
	ret = snd_soc_update_bits(codec, TAS5720_POWER_CTRL_REG,
				  TAS5720_SDZ, 0);
	if (ret < 0)
		goto error_snd_soc_update_bits;

	INIT_DELAYED_WORK(&tas5720->fault_check_work, tas5720_fault_check_work);

	return 0;

error_snd_soc_update_bits:
	dev_err(codec->dev, "error configuring device registers: %d\n", ret);

probe_fail:
	regulator_bulk_disable(ARRAY_SIZE(tas5720->supplies),
			       tas5720->supplies);
	return ret;
}

static int tas5720_codec_remove(struct snd_soc_codec *codec)
{
	struct tas5720_data *tas5720 = snd_soc_codec_get_drvdata(codec);
	int ret;

	cancel_delayed_work_sync(&tas5720->fault_check_work);

	ret = regulator_bulk_disable(ARRAY_SIZE(tas5720->supplies),
				     tas5720->supplies);
	if (ret < 0)
		dev_err(codec->dev, "failed to disable supplies: %d\n", ret);

	return ret;
};

static int tas5720_dac_event(struct snd_soc_dapm_widget *w,
			     struct snd_kcontrol *kcontrol, int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct tas5720_data *tas5720 = snd_soc_codec_get_drvdata(codec);
	int ret;

	if (event & SND_SOC_DAPM_POST_PMU) {
		/* Take TAS5720 out of shutdown mode */
		ret = snd_soc_update_bits(codec, TAS5720_POWER_CTRL_REG,
					  TAS5720_SDZ, TAS5720_SDZ);
		if (ret < 0) {
			dev_err(codec->dev, "error waking codec: %d\n", ret);
			return ret;
		}

		/*
		 * Observe codec shutdown-to-active time. The datasheet only
		 * lists a nominal value however just use-it as-is without
		 * additional padding to minimize the delay introduced in
		 * starting to play audio (actually there is other setup done
		 * by the ASoC framework that will provide additional delays,
		 * so we should always be safe).
		 */
		msleep(25);

		/* Turn on TAS5720 periodic fault checking/handling */
		tas5720->last_fault = 0;
		schedule_delayed_work(&tas5720->fault_check_work,
				msecs_to_jiffies(TAS5720_FAULT_CHECK_INTERVAL));
	} else if (event & SND_SOC_DAPM_PRE_PMD) {
		/* Disable TAS5720 periodic fault checking/handling */
		cancel_delayed_work_sync(&tas5720->fault_check_work);

		/* Place TAS5720 in shutdown mode to minimize current draw */
		ret = snd_soc_update_bits(codec, TAS5720_POWER_CTRL_REG,
					  TAS5720_SDZ, 0);
		if (ret < 0) {
			dev_err(codec->dev, "error shutting down codec: %d\n",
				ret);
			return ret;
		}
	}

	return 0;
}

#ifdef CONFIG_PM
static int tas5720_suspend(struct snd_soc_codec *codec)
{
	struct tas5720_data *tas5720 = snd_soc_codec_get_drvdata(codec);
	int ret;

	regcache_cache_only(tas5720->regmap, true);
	regcache_mark_dirty(tas5720->regmap);

	ret = regulator_bulk_disable(ARRAY_SIZE(tas5720->supplies),
				     tas5720->supplies);
	if (ret < 0)
		dev_err(codec->dev, "failed to disable supplies: %d\n", ret);

	return ret;
}

static int tas5720_resume(struct snd_soc_codec *codec)
{
	struct tas5720_data *tas5720 = snd_soc_codec_get_drvdata(codec);
	int ret;

	ret = regulator_bulk_enable(ARRAY_SIZE(tas5720->supplies),
				    tas5720->supplies);
	if (ret < 0) {
		dev_err(codec->dev, "failed to enable supplies: %d\n", ret);
		return ret;
	}

	regcache_cache_only(tas5720->regmap, false);

	ret = regcache_sync(tas5720->regmap);
	if (ret < 0) {
		dev_err(codec->dev, "failed to sync regcache: %d\n", ret);
		return ret;
	}

	return 0;
}
#else
#define tas5720_suspend NULL
#define tas5720_resume NULL
#endif

static bool tas5720_is_volatile_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case TAS5720_DEVICE_ID_REG:
	case TAS5720_FAULT_REG:
		return true;
	default:
		return false;
	}
}

static const struct regmap_config tas5720_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = TAS5720_MAX_REG,
	.cache_type = REGCACHE_RBTREE,
	.volatile_reg = tas5720_is_volatile_reg,
};

/*
 * DAC analog gain. There are four discrete values to select from, ranging
 * from 19.2 dB to 26.3dB.
 */
static const DECLARE_TLV_DB_RANGE(dac_analog_tlv,
	0x0, 0x0, TLV_DB_SCALE_ITEM(1920, 0, 0),
	0x1, 0x1, TLV_DB_SCALE_ITEM(2070, 0, 0),
	0x2, 0x2, TLV_DB_SCALE_ITEM(2350, 0, 0),
	0x3, 0x3, TLV_DB_SCALE_ITEM(2630, 0, 0),
);

/*
 * DAC digital volumes. From -103.5 to 24 dB in 0.5 dB steps. Note that
 * setting the gain below -100 dB (register value <0x7) is effectively a MUTE
 * as per device datasheet.
 */
static DECLARE_TLV_DB_SCALE(dac_tlv, -10350, 50, 0);

static const struct snd_kcontrol_new tas5720_snd_controls[] = {
	SOC_SINGLE_TLV("Speaker Driver Playback Volume",
		       TAS5720_VOLUME_CTRL_REG, 0, 0xff, 0, dac_tlv),
	SOC_SINGLE_TLV("Speaker Driver Analog Gain", TAS5720_ANALOG_CTRL_REG,
		       TAS5720_ANALOG_GAIN_SHIFT, 3, 0, dac_analog_tlv),
};

static const struct snd_soc_dapm_widget tas5720_dapm_widgets[] = {
	SND_SOC_DAPM_AIF_IN("DAC IN", "Playback", 0, SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas5720_dac_event,
			   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
	SND_SOC_DAPM_OUTPUT("OUT")
};

static const struct snd_soc_dapm_route tas5720_audio_map[] = {
	{ "DAC", NULL, "DAC IN" },
	{ "OUT", NULL, "DAC" },
};

static struct snd_soc_codec_driver soc_codec_dev_tas5720 = {
	.probe = tas5720_codec_probe,
	.remove = tas5720_codec_remove,
	.suspend = tas5720_suspend,
	.resume = tas5720_resume,

	.controls = tas5720_snd_controls,
	.num_controls = ARRAY_SIZE(tas5720_snd_controls),
	.dapm_widgets = tas5720_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(tas5720_dapm_widgets),
	.dapm_routes = tas5720_audio_map,
	.num_dapm_routes = ARRAY_SIZE(tas5720_audio_map),
};

/* PCM rates supported by the TAS5720 driver */
#define TAS5720_RATES	(SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
			 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)

/* Formats supported by TAS5720 driver */
#define TAS5720_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE |\
			 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE)

static struct snd_soc_dai_ops tas5720_speaker_dai_ops = {
	.hw_params	= tas5720_hw_params,
	.set_fmt	= tas5720_set_dai_fmt,
	.set_tdm_slot	= tas5720_set_dai_tdm_slot,
	.digital_mute	= tas5720_mute,
};

/*
 * TAS5720 DAI structure
 *
 * Note that were are advertising .playback.channels_max = 2 despite this being
 * a mono amplifier. The reason for that is that some serial ports such as TI's
 * McASP module have a minimum number of channels (2) that they can output.
 * Advertising more channels than we have will allow us to interface with such
 * a serial port without really any negative side effects as the TAS5720 will
 * simply ignore any extra channel(s) asides from the one channel that is
 * configured to be played back.
 */
static struct snd_soc_dai_driver tas5720_dai[] = {
	{
		.name = "tas5720-amplifier",
		.playback = {
			.stream_name = "Playback",
			.channels_min = 1,
			.channels_max = 2,
			.rates = TAS5720_RATES,
			.formats = TAS5720_FORMATS,
		},
		.ops = &tas5720_speaker_dai_ops,
	},
};

static int tas5720_probe(struct i2c_client *client,
			 const struct i2c_device_id *id)
{
	struct device *dev = &client->dev;
	struct tas5720_data *data;
	int ret;
	int i;

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

	data->tas5720_client = client;
	data->regmap = devm_regmap_init_i2c(client, &tas5720_regmap_config);
	if (IS_ERR(data->regmap)) {
		ret = PTR_ERR(data->regmap);
		dev_err(dev, "failed to allocate register map: %d\n", ret);
		return ret;
	}

	for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
		data->supplies[i].supply = tas5720_supply_names[i];

	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
				      data->supplies);
	if (ret != 0) {
		dev_err(dev, "failed to request supplies: %d\n", ret);
		return ret;
	}

	dev_set_drvdata(dev, data);

	ret = snd_soc_register_codec(&client->dev,
				     &soc_codec_dev_tas5720,
				     tas5720_dai, ARRAY_SIZE(tas5720_dai));
	if (ret < 0) {
		dev_err(dev, "failed to register codec: %d\n", ret);
		return ret;
	}

	return 0;
}

static int tas5720_remove(struct i2c_client *client)
{
	struct device *dev = &client->dev;

	snd_soc_unregister_codec(dev);

	return 0;
}

static const struct i2c_device_id tas5720_id[] = {
	{ "tas5720", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, tas5720_id);

#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id tas5720_of_match[] = {
	{ .compatible = "ti,tas5720", },
	{ },
};
MODULE_DEVICE_TABLE(of, tas5720_of_match);
#endif

static struct i2c_driver tas5720_i2c_driver = {
	.driver = {
		.name = "tas5720",
		.of_match_table = of_match_ptr(tas5720_of_match),
	},
	.probe = tas5720_probe,
	.remove = tas5720_remove,
	.id_table = tas5720_id,
};

module_i2c_driver(tas5720_i2c_driver);

MODULE_AUTHOR("Andreas Dannenberg <dannenberg@ti.com>");
MODULE_DESCRIPTION("TAS5720 Audio amplifier driver");
MODULE_LICENSE("GPL");