xref: /openbmc/linux/sound/soc/codecs/tas571x.c (revision 0edbfea5)
1 /*
2  * TAS571x amplifier audio driver
3  *
4  * Copyright (C) 2015 Google, Inc.
5  * Copyright (c) 2013 Daniel Mack <zonque@gmail.com>
6  *
7  * TAS5721 support:
8  * Copyright (C) 2016 Petr Kulhavy, Barix AG <petr@barix.com>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  */
15 
16 #include <linux/clk.h>
17 #include <linux/delay.h>
18 #include <linux/device.h>
19 #include <linux/gpio/consumer.h>
20 #include <linux/i2c.h>
21 #include <linux/init.h>
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/of_device.h>
25 #include <linux/regmap.h>
26 #include <linux/regulator/consumer.h>
27 #include <linux/stddef.h>
28 #include <sound/pcm_params.h>
29 #include <sound/soc.h>
30 #include <sound/tlv.h>
31 
32 #include "tas571x.h"
33 
34 #define TAS571X_MAX_SUPPLIES		6
35 
36 struct tas571x_chip {
37 	const char			*const *supply_names;
38 	int				num_supply_names;
39 	const struct snd_kcontrol_new	*controls;
40 	int				num_controls;
41 	const struct regmap_config	*regmap_config;
42 	int				vol_reg_size;
43 };
44 
45 struct tas571x_private {
46 	const struct tas571x_chip	*chip;
47 	struct regmap			*regmap;
48 	struct regulator_bulk_data	supplies[TAS571X_MAX_SUPPLIES];
49 	struct clk			*mclk;
50 	unsigned int			format;
51 	struct gpio_desc		*reset_gpio;
52 	struct gpio_desc		*pdn_gpio;
53 	struct snd_soc_codec_driver	codec_driver;
54 };
55 
56 static int tas571x_register_size(struct tas571x_private *priv, unsigned int reg)
57 {
58 	switch (reg) {
59 	case TAS571X_MVOL_REG:
60 	case TAS571X_CH1_VOL_REG:
61 	case TAS571X_CH2_VOL_REG:
62 		return priv->chip->vol_reg_size;
63 	case TAS571X_INPUT_MUX_REG:
64 	case TAS571X_CH4_SRC_SELECT_REG:
65 	case TAS571X_PWM_MUX_REG:
66 		return 4;
67 	default:
68 		return 1;
69 	}
70 }
71 
72 static int tas571x_reg_write(void *context, unsigned int reg,
73 			     unsigned int value)
74 {
75 	struct i2c_client *client = context;
76 	struct tas571x_private *priv = i2c_get_clientdata(client);
77 	unsigned int i, size;
78 	uint8_t buf[5];
79 	int ret;
80 
81 	size = tas571x_register_size(priv, reg);
82 	buf[0] = reg;
83 
84 	for (i = size; i >= 1; --i) {
85 		buf[i] = value;
86 		value >>= 8;
87 	}
88 
89 	ret = i2c_master_send(client, buf, size + 1);
90 	if (ret == size + 1)
91 		return 0;
92 	else if (ret < 0)
93 		return ret;
94 	else
95 		return -EIO;
96 }
97 
98 static int tas571x_reg_read(void *context, unsigned int reg,
99 			    unsigned int *value)
100 {
101 	struct i2c_client *client = context;
102 	struct tas571x_private *priv = i2c_get_clientdata(client);
103 	uint8_t send_buf, recv_buf[4];
104 	struct i2c_msg msgs[2];
105 	unsigned int size;
106 	unsigned int i;
107 	int ret;
108 
109 	size = tas571x_register_size(priv, reg);
110 	send_buf = reg;
111 
112 	msgs[0].addr = client->addr;
113 	msgs[0].len = sizeof(send_buf);
114 	msgs[0].buf = &send_buf;
115 	msgs[0].flags = 0;
116 
117 	msgs[1].addr = client->addr;
118 	msgs[1].len = size;
119 	msgs[1].buf = recv_buf;
120 	msgs[1].flags = I2C_M_RD;
121 
122 	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
123 	if (ret < 0)
124 		return ret;
125 	else if (ret != ARRAY_SIZE(msgs))
126 		return -EIO;
127 
128 	*value = 0;
129 
130 	for (i = 0; i < size; i++) {
131 		*value <<= 8;
132 		*value |= recv_buf[i];
133 	}
134 
135 	return 0;
136 }
137 
138 static int tas571x_set_dai_fmt(struct snd_soc_dai *dai, unsigned int format)
139 {
140 	struct tas571x_private *priv = snd_soc_codec_get_drvdata(dai->codec);
141 
142 	priv->format = format;
143 
144 	return 0;
145 }
146 
147 static int tas571x_hw_params(struct snd_pcm_substream *substream,
148 			     struct snd_pcm_hw_params *params,
149 			     struct snd_soc_dai *dai)
150 {
151 	struct tas571x_private *priv = snd_soc_codec_get_drvdata(dai->codec);
152 	u32 val;
153 
154 	switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
155 	case SND_SOC_DAIFMT_RIGHT_J:
156 		val = 0x00;
157 		break;
158 	case SND_SOC_DAIFMT_I2S:
159 		val = 0x03;
160 		break;
161 	case SND_SOC_DAIFMT_LEFT_J:
162 		val = 0x06;
163 		break;
164 	default:
165 		return -EINVAL;
166 	}
167 
168 	if (params_width(params) >= 24)
169 		val += 2;
170 	else if (params_width(params) >= 20)
171 		val += 1;
172 
173 	return regmap_update_bits(priv->regmap, TAS571X_SDI_REG,
174 				  TAS571X_SDI_FMT_MASK, val);
175 }
176 
177 static int tas571x_mute(struct snd_soc_dai *dai, int mute)
178 {
179 	struct snd_soc_codec *codec = dai->codec;
180 	u8 sysctl2;
181 	int ret;
182 
183 	sysctl2 = mute ? TAS571X_SYS_CTRL_2_SDN_MASK : 0;
184 
185 	ret = snd_soc_update_bits(codec,
186 			    TAS571X_SYS_CTRL_2_REG,
187 		     TAS571X_SYS_CTRL_2_SDN_MASK,
188 		     sysctl2);
189 	usleep_range(1000, 2000);
190 
191 	return ret;
192 }
193 
194 static int tas571x_set_bias_level(struct snd_soc_codec *codec,
195 				  enum snd_soc_bias_level level)
196 {
197 	struct tas571x_private *priv = snd_soc_codec_get_drvdata(codec);
198 	int ret;
199 
200 	switch (level) {
201 	case SND_SOC_BIAS_ON:
202 		break;
203 	case SND_SOC_BIAS_PREPARE:
204 		break;
205 	case SND_SOC_BIAS_STANDBY:
206 		if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
207 			if (!IS_ERR(priv->mclk)) {
208 				ret = clk_prepare_enable(priv->mclk);
209 				if (ret) {
210 					dev_err(codec->dev,
211 						"Failed to enable master clock: %d\n",
212 						ret);
213 					return ret;
214 				}
215 			}
216 
217 			gpiod_set_value(priv->pdn_gpio, 0);
218 			usleep_range(5000, 6000);
219 
220 			regcache_cache_only(priv->regmap, false);
221 			ret = regcache_sync(priv->regmap);
222 			if (ret)
223 				return ret;
224 		}
225 		break;
226 	case SND_SOC_BIAS_OFF:
227 		regcache_cache_only(priv->regmap, true);
228 		gpiod_set_value(priv->pdn_gpio, 1);
229 
230 		if (!IS_ERR(priv->mclk))
231 			clk_disable_unprepare(priv->mclk);
232 		break;
233 	}
234 
235 	return 0;
236 }
237 
238 static const struct snd_soc_dai_ops tas571x_dai_ops = {
239 	.set_fmt	= tas571x_set_dai_fmt,
240 	.hw_params	= tas571x_hw_params,
241 	.digital_mute	= tas571x_mute,
242 };
243 
244 static const char *const tas5711_supply_names[] = {
245 	"AVDD",
246 	"DVDD",
247 	"PVDD_A",
248 	"PVDD_B",
249 	"PVDD_C",
250 	"PVDD_D",
251 };
252 
253 static const DECLARE_TLV_DB_SCALE(tas5711_volume_tlv, -10350, 50, 1);
254 
255 static const struct snd_kcontrol_new tas5711_controls[] = {
256 	SOC_SINGLE_TLV("Master Volume",
257 		       TAS571X_MVOL_REG,
258 		       0, 0xff, 1, tas5711_volume_tlv),
259 	SOC_DOUBLE_R_TLV("Speaker Volume",
260 			 TAS571X_CH1_VOL_REG,
261 			 TAS571X_CH2_VOL_REG,
262 			 0, 0xff, 1, tas5711_volume_tlv),
263 	SOC_DOUBLE("Speaker Switch",
264 		   TAS571X_SOFT_MUTE_REG,
265 		   TAS571X_SOFT_MUTE_CH1_SHIFT, TAS571X_SOFT_MUTE_CH2_SHIFT,
266 		   1, 1),
267 };
268 
269 static const struct regmap_range tas571x_readonly_regs_range[] = {
270 	regmap_reg_range(TAS571X_CLK_CTRL_REG,  TAS571X_DEV_ID_REG),
271 };
272 
273 static const struct regmap_range tas571x_volatile_regs_range[] = {
274 	regmap_reg_range(TAS571X_CLK_CTRL_REG,  TAS571X_ERR_STATUS_REG),
275 	regmap_reg_range(TAS571X_OSC_TRIM_REG,  TAS571X_OSC_TRIM_REG),
276 };
277 
278 static const struct regmap_access_table tas571x_write_regs = {
279 	.no_ranges =	tas571x_readonly_regs_range,
280 	.n_no_ranges =	ARRAY_SIZE(tas571x_readonly_regs_range),
281 };
282 
283 static const struct regmap_access_table tas571x_volatile_regs = {
284 	.yes_ranges =	tas571x_volatile_regs_range,
285 	.n_yes_ranges =	ARRAY_SIZE(tas571x_volatile_regs_range),
286 
287 };
288 
289 static const struct reg_default tas5711_reg_defaults[] = {
290 	{ 0x04, 0x05 },
291 	{ 0x05, 0x40 },
292 	{ 0x06, 0x00 },
293 	{ 0x07, 0xff },
294 	{ 0x08, 0x30 },
295 	{ 0x09, 0x30 },
296 	{ 0x1b, 0x82 },
297 };
298 
299 static const struct regmap_config tas5711_regmap_config = {
300 	.reg_bits			= 8,
301 	.val_bits			= 32,
302 	.max_register			= 0xff,
303 	.reg_read			= tas571x_reg_read,
304 	.reg_write			= tas571x_reg_write,
305 	.reg_defaults			= tas5711_reg_defaults,
306 	.num_reg_defaults		= ARRAY_SIZE(tas5711_reg_defaults),
307 	.cache_type			= REGCACHE_RBTREE,
308 	.wr_table			= &tas571x_write_regs,
309 	.volatile_table			= &tas571x_volatile_regs,
310 };
311 
312 static const struct tas571x_chip tas5711_chip = {
313 	.supply_names			= tas5711_supply_names,
314 	.num_supply_names		= ARRAY_SIZE(tas5711_supply_names),
315 	.controls			= tas5711_controls,
316 	.num_controls			= ARRAY_SIZE(tas5711_controls),
317 	.regmap_config			= &tas5711_regmap_config,
318 	.vol_reg_size			= 1,
319 };
320 
321 static const char *const tas5717_supply_names[] = {
322 	"AVDD",
323 	"DVDD",
324 	"HPVDD",
325 	"PVDD_AB",
326 	"PVDD_CD",
327 };
328 
329 static const DECLARE_TLV_DB_SCALE(tas5717_volume_tlv, -10375, 25, 0);
330 
331 static const struct snd_kcontrol_new tas5717_controls[] = {
332 	/* MVOL LSB is ignored - see comments in tas571x_i2c_probe() */
333 	SOC_SINGLE_TLV("Master Volume",
334 		       TAS571X_MVOL_REG, 1, 0x1ff, 1,
335 		       tas5717_volume_tlv),
336 	SOC_DOUBLE_R_TLV("Speaker Volume",
337 			 TAS571X_CH1_VOL_REG, TAS571X_CH2_VOL_REG,
338 			 1, 0x1ff, 1, tas5717_volume_tlv),
339 	SOC_DOUBLE("Speaker Switch",
340 		   TAS571X_SOFT_MUTE_REG,
341 		   TAS571X_SOFT_MUTE_CH1_SHIFT, TAS571X_SOFT_MUTE_CH2_SHIFT,
342 		   1, 1),
343 };
344 
345 static const struct reg_default tas5717_reg_defaults[] = {
346 	{ 0x04, 0x05 },
347 	{ 0x05, 0x40 },
348 	{ 0x06, 0x00 },
349 	{ 0x07, 0x03ff },
350 	{ 0x08, 0x00c0 },
351 	{ 0x09, 0x00c0 },
352 	{ 0x1b, 0x82 },
353 };
354 
355 static const struct regmap_config tas5717_regmap_config = {
356 	.reg_bits			= 8,
357 	.val_bits			= 32,
358 	.max_register			= 0xff,
359 	.reg_read			= tas571x_reg_read,
360 	.reg_write			= tas571x_reg_write,
361 	.reg_defaults			= tas5717_reg_defaults,
362 	.num_reg_defaults		= ARRAY_SIZE(tas5717_reg_defaults),
363 	.cache_type			= REGCACHE_RBTREE,
364 	.wr_table			= &tas571x_write_regs,
365 	.volatile_table			= &tas571x_volatile_regs,
366 };
367 
368 /* This entry is reused for tas5719 as the software interface is identical. */
369 static const struct tas571x_chip tas5717_chip = {
370 	.supply_names			= tas5717_supply_names,
371 	.num_supply_names		= ARRAY_SIZE(tas5717_supply_names),
372 	.controls			= tas5717_controls,
373 	.num_controls			= ARRAY_SIZE(tas5717_controls),
374 	.regmap_config			= &tas5717_regmap_config,
375 	.vol_reg_size			= 2,
376 };
377 
378 static const char *const tas5721_supply_names[] = {
379 	"AVDD",
380 	"DVDD",
381 	"DRVDD",
382 	"PVDD",
383 };
384 
385 static const struct snd_kcontrol_new tas5721_controls[] = {
386 	SOC_SINGLE_TLV("Master Volume",
387 		       TAS571X_MVOL_REG,
388 		       0, 0xff, 1, tas5711_volume_tlv),
389 	SOC_DOUBLE_R_TLV("Speaker Volume",
390 			 TAS571X_CH1_VOL_REG,
391 			 TAS571X_CH2_VOL_REG,
392 			 0, 0xff, 1, tas5711_volume_tlv),
393 	SOC_DOUBLE("Speaker Switch",
394 		   TAS571X_SOFT_MUTE_REG,
395 		   TAS571X_SOFT_MUTE_CH1_SHIFT, TAS571X_SOFT_MUTE_CH2_SHIFT,
396 		   1, 1),
397 };
398 
399 static const struct reg_default tas5721_reg_defaults[] = {
400 	{TAS571X_CLK_CTRL_REG,		0x6c},
401 	{TAS571X_DEV_ID_REG,		0x00},
402 	{TAS571X_ERR_STATUS_REG,	0x00},
403 	{TAS571X_SYS_CTRL_1_REG,	0xa0},
404 	{TAS571X_SDI_REG,		0x05},
405 	{TAS571X_SYS_CTRL_2_REG,	0x40},
406 	{TAS571X_SOFT_MUTE_REG,		0x00},
407 	{TAS571X_MVOL_REG,		0xff},
408 	{TAS571X_CH1_VOL_REG,		0x30},
409 	{TAS571X_CH2_VOL_REG,		0x30},
410 	{TAS571X_CH3_VOL_REG,		0x30},
411 	{TAS571X_VOL_CFG_REG,		0x91},
412 	{TAS571X_MODULATION_LIMIT_REG,	0x02},
413 	{TAS571X_IC_DELAY_CH1_REG,	0xac},
414 	{TAS571X_IC_DELAY_CH2_REG,	0x54},
415 	{TAS571X_IC_DELAY_CH3_REG,	0xac},
416 	{TAS571X_IC_DELAY_CH4_REG,	0x54},
417 	{TAS571X_PWM_CH_SDN_GROUP_REG,	0x30},
418 	{TAS571X_START_STOP_PERIOD_REG,	0x0f},
419 	{TAS571X_OSC_TRIM_REG,		0x82},
420 	{TAS571X_BKND_ERR_REG,		0x02},
421 	{TAS571X_INPUT_MUX_REG,		0x17772},
422 	{TAS571X_CH4_SRC_SELECT_REG,	0x4303},
423 	{TAS571X_PWM_MUX_REG,		0x1021345},
424 };
425 
426 static const struct regmap_config tas5721_regmap_config = {
427 	.reg_bits			= 8,
428 	.val_bits			= 32,
429 	.max_register			= 0xff,
430 	.reg_read			= tas571x_reg_read,
431 	.reg_write			= tas571x_reg_write,
432 	.reg_defaults			= tas5721_reg_defaults,
433 	.num_reg_defaults		= ARRAY_SIZE(tas5721_reg_defaults),
434 	.cache_type			= REGCACHE_RBTREE,
435 	.wr_table			= &tas571x_write_regs,
436 	.volatile_table			= &tas571x_volatile_regs,
437 };
438 
439 
440 static const struct tas571x_chip tas5721_chip = {
441 	.supply_names			= tas5721_supply_names,
442 	.num_supply_names		= ARRAY_SIZE(tas5721_supply_names),
443 	.controls			= tas5711_controls,
444 	.num_controls			= ARRAY_SIZE(tas5711_controls),
445 	.regmap_config			= &tas5721_regmap_config,
446 	.vol_reg_size			= 1,
447 };
448 
449 static const struct snd_soc_dapm_widget tas571x_dapm_widgets[] = {
450 	SND_SOC_DAPM_DAC("DACL", NULL, SND_SOC_NOPM, 0, 0),
451 	SND_SOC_DAPM_DAC("DACR", NULL, SND_SOC_NOPM, 0, 0),
452 
453 	SND_SOC_DAPM_OUTPUT("OUT_A"),
454 	SND_SOC_DAPM_OUTPUT("OUT_B"),
455 	SND_SOC_DAPM_OUTPUT("OUT_C"),
456 	SND_SOC_DAPM_OUTPUT("OUT_D"),
457 };
458 
459 static const struct snd_soc_dapm_route tas571x_dapm_routes[] = {
460 	{ "DACL",  NULL, "Playback" },
461 	{ "DACR",  NULL, "Playback" },
462 
463 	{ "OUT_A", NULL, "DACL" },
464 	{ "OUT_B", NULL, "DACL" },
465 	{ "OUT_C", NULL, "DACR" },
466 	{ "OUT_D", NULL, "DACR" },
467 };
468 
469 static const struct snd_soc_codec_driver tas571x_codec = {
470 	.set_bias_level = tas571x_set_bias_level,
471 	.idle_bias_off = true,
472 
473 	.dapm_widgets = tas571x_dapm_widgets,
474 	.num_dapm_widgets = ARRAY_SIZE(tas571x_dapm_widgets),
475 	.dapm_routes = tas571x_dapm_routes,
476 	.num_dapm_routes = ARRAY_SIZE(tas571x_dapm_routes),
477 };
478 
479 static struct snd_soc_dai_driver tas571x_dai = {
480 	.name = "tas571x-hifi",
481 	.playback = {
482 		.stream_name = "Playback",
483 		.channels_min = 2,
484 		.channels_max = 2,
485 		.rates = SNDRV_PCM_RATE_8000_48000,
486 		.formats = SNDRV_PCM_FMTBIT_S32_LE |
487 			   SNDRV_PCM_FMTBIT_S24_LE |
488 			   SNDRV_PCM_FMTBIT_S16_LE,
489 	},
490 	.ops = &tas571x_dai_ops,
491 };
492 
493 static const struct of_device_id tas571x_of_match[];
494 
495 static int tas571x_i2c_probe(struct i2c_client *client,
496 			     const struct i2c_device_id *id)
497 {
498 	struct tas571x_private *priv;
499 	struct device *dev = &client->dev;
500 	const struct of_device_id *of_id;
501 	int i, ret;
502 
503 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
504 	if (!priv)
505 		return -ENOMEM;
506 	i2c_set_clientdata(client, priv);
507 
508 	of_id = of_match_device(tas571x_of_match, dev);
509 	if (of_id)
510 		priv->chip = of_id->data;
511 	else
512 		priv->chip = (void *) id->driver_data;
513 
514 	priv->mclk = devm_clk_get(dev, "mclk");
515 	if (IS_ERR(priv->mclk) && PTR_ERR(priv->mclk) != -ENOENT) {
516 		dev_err(dev, "Failed to request mclk: %ld\n",
517 			PTR_ERR(priv->mclk));
518 		return PTR_ERR(priv->mclk);
519 	}
520 
521 	BUG_ON(priv->chip->num_supply_names > TAS571X_MAX_SUPPLIES);
522 	for (i = 0; i < priv->chip->num_supply_names; i++)
523 		priv->supplies[i].supply = priv->chip->supply_names[i];
524 
525 	ret = devm_regulator_bulk_get(dev, priv->chip->num_supply_names,
526 				      priv->supplies);
527 	if (ret) {
528 		dev_err(dev, "Failed to get supplies: %d\n", ret);
529 		return ret;
530 	}
531 	ret = regulator_bulk_enable(priv->chip->num_supply_names,
532 				    priv->supplies);
533 	if (ret) {
534 		dev_err(dev, "Failed to enable supplies: %d\n", ret);
535 		return ret;
536 	}
537 
538 	priv->regmap = devm_regmap_init(dev, NULL, client,
539 					priv->chip->regmap_config);
540 	if (IS_ERR(priv->regmap))
541 		return PTR_ERR(priv->regmap);
542 
543 	priv->pdn_gpio = devm_gpiod_get_optional(dev, "pdn", GPIOD_OUT_LOW);
544 	if (IS_ERR(priv->pdn_gpio)) {
545 		dev_err(dev, "error requesting pdn_gpio: %ld\n",
546 			PTR_ERR(priv->pdn_gpio));
547 		return PTR_ERR(priv->pdn_gpio);
548 	}
549 
550 	priv->reset_gpio = devm_gpiod_get_optional(dev, "reset",
551 						   GPIOD_OUT_HIGH);
552 	if (IS_ERR(priv->reset_gpio)) {
553 		dev_err(dev, "error requesting reset_gpio: %ld\n",
554 			PTR_ERR(priv->reset_gpio));
555 		return PTR_ERR(priv->reset_gpio);
556 	} else if (priv->reset_gpio) {
557 		/* pulse the active low reset line for ~100us */
558 		usleep_range(100, 200);
559 		gpiod_set_value(priv->reset_gpio, 0);
560 		usleep_range(12000, 20000);
561 	}
562 
563 	ret = regmap_write(priv->regmap, TAS571X_OSC_TRIM_REG, 0);
564 	if (ret)
565 		return ret;
566 
567 
568 	memcpy(&priv->codec_driver, &tas571x_codec, sizeof(priv->codec_driver));
569 	priv->codec_driver.controls = priv->chip->controls;
570 	priv->codec_driver.num_controls = priv->chip->num_controls;
571 
572 	if (priv->chip->vol_reg_size == 2) {
573 		/*
574 		 * The master volume defaults to 0x3ff (mute), but we ignore
575 		 * (zero) the LSB because the hardware step size is 0.125 dB
576 		 * and TLV_DB_SCALE_ITEM has a resolution of 0.01 dB.
577 		 */
578 		ret = regmap_update_bits(priv->regmap, TAS571X_MVOL_REG, 1, 0);
579 		if (ret)
580 			return ret;
581 	}
582 
583 	regcache_cache_only(priv->regmap, true);
584 	gpiod_set_value(priv->pdn_gpio, 1);
585 
586 	return snd_soc_register_codec(&client->dev, &priv->codec_driver,
587 				      &tas571x_dai, 1);
588 }
589 
590 static int tas571x_i2c_remove(struct i2c_client *client)
591 {
592 	struct tas571x_private *priv = i2c_get_clientdata(client);
593 
594 	snd_soc_unregister_codec(&client->dev);
595 	regulator_bulk_disable(priv->chip->num_supply_names, priv->supplies);
596 
597 	return 0;
598 }
599 
600 static const struct of_device_id tas571x_of_match[] = {
601 	{ .compatible = "ti,tas5711", .data = &tas5711_chip, },
602 	{ .compatible = "ti,tas5717", .data = &tas5717_chip, },
603 	{ .compatible = "ti,tas5719", .data = &tas5717_chip, },
604 	{ .compatible = "ti,tas5721", .data = &tas5721_chip, },
605 	{ }
606 };
607 MODULE_DEVICE_TABLE(of, tas571x_of_match);
608 
609 static const struct i2c_device_id tas571x_i2c_id[] = {
610 	{ "tas5711", (kernel_ulong_t) &tas5711_chip },
611 	{ "tas5717", (kernel_ulong_t) &tas5717_chip },
612 	{ "tas5719", (kernel_ulong_t) &tas5717_chip },
613 	{ "tas5721", (kernel_ulong_t) &tas5721_chip },
614 	{ }
615 };
616 MODULE_DEVICE_TABLE(i2c, tas571x_i2c_id);
617 
618 static struct i2c_driver tas571x_i2c_driver = {
619 	.driver = {
620 		.name = "tas571x",
621 		.of_match_table = of_match_ptr(tas571x_of_match),
622 	},
623 	.probe = tas571x_i2c_probe,
624 	.remove = tas571x_i2c_remove,
625 	.id_table = tas571x_i2c_id,
626 };
627 module_i2c_driver(tas571x_i2c_driver);
628 
629 MODULE_DESCRIPTION("ASoC TAS571x driver");
630 MODULE_AUTHOR("Kevin Cernekee <cernekee@chromium.org>");
631 MODULE_LICENSE("GPL");
632