xref: /openbmc/linux/sound/soc/samsung/tm2_wm5110.c (revision ded1ffea)
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // Copyright (C) 2015 - 2016 Samsung Electronics Co., Ltd.
4 //
5 // Authors: Inha Song <ideal.song@samsung.com>
6 //          Sylwester Nawrocki <s.nawrocki@samsung.com>
7 
8 #include <linux/clk.h>
9 #include <linux/gpio.h>
10 #include <linux/gpio/consumer.h>
11 #include <linux/module.h>
12 #include <linux/of.h>
13 #include <sound/pcm_params.h>
14 #include <sound/soc.h>
15 
16 #include "i2s.h"
17 #include "../codecs/wm5110.h"
18 
19 /*
20  * The source clock is XCLKOUT with its mux set to the external fixed rate
21  * oscillator (XXTI).
22  */
23 #define MCLK_RATE	24000000U
24 
25 #define TM2_DAI_AIF1	0
26 #define TM2_DAI_AIF2	1
27 
28 struct tm2_machine_priv {
29 	struct snd_soc_component *component;
30 	unsigned int sysclk_rate;
31 	struct gpio_desc *gpio_mic_bias;
32 };
33 
34 static int tm2_start_sysclk(struct snd_soc_card *card)
35 {
36 	struct tm2_machine_priv *priv = snd_soc_card_get_drvdata(card);
37 	struct snd_soc_component *component = priv->component;
38 	int ret;
39 
40 	ret = snd_soc_component_set_pll(component, WM5110_FLL1_REFCLK,
41 				    ARIZONA_FLL_SRC_MCLK1,
42 				    MCLK_RATE,
43 				    priv->sysclk_rate);
44 	if (ret < 0) {
45 		dev_err(component->dev, "Failed to set FLL1 source: %d\n", ret);
46 		return ret;
47 	}
48 
49 	ret = snd_soc_component_set_pll(component, WM5110_FLL1,
50 				    ARIZONA_FLL_SRC_MCLK1,
51 				    MCLK_RATE,
52 				    priv->sysclk_rate);
53 	if (ret < 0) {
54 		dev_err(component->dev, "Failed to start FLL1: %d\n", ret);
55 		return ret;
56 	}
57 
58 	ret = snd_soc_component_set_sysclk(component, ARIZONA_CLK_SYSCLK,
59 				       ARIZONA_CLK_SRC_FLL1,
60 				       priv->sysclk_rate,
61 				       SND_SOC_CLOCK_IN);
62 	if (ret < 0) {
63 		dev_err(component->dev, "Failed to set SYSCLK source: %d\n", ret);
64 		return ret;
65 	}
66 
67 	return 0;
68 }
69 
70 static int tm2_stop_sysclk(struct snd_soc_card *card)
71 {
72 	struct tm2_machine_priv *priv = snd_soc_card_get_drvdata(card);
73 	struct snd_soc_component *component = priv->component;
74 	int ret;
75 
76 	ret = snd_soc_component_set_pll(component, WM5110_FLL1, 0, 0, 0);
77 	if (ret < 0) {
78 		dev_err(component->dev, "Failed to stop FLL1: %d\n", ret);
79 		return ret;
80 	}
81 
82 	ret = snd_soc_component_set_sysclk(component, ARIZONA_CLK_SYSCLK,
83 				       ARIZONA_CLK_SRC_FLL1, 0, 0);
84 	if (ret < 0) {
85 		dev_err(component->dev, "Failed to stop SYSCLK: %d\n", ret);
86 		return ret;
87 	}
88 
89 	return 0;
90 }
91 
92 static int tm2_aif1_hw_params(struct snd_pcm_substream *substream,
93 				struct snd_pcm_hw_params *params)
94 {
95 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
96 	struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component;
97 	struct tm2_machine_priv *priv = snd_soc_card_get_drvdata(rtd->card);
98 
99 	switch (params_rate(params)) {
100 	case 4000:
101 	case 8000:
102 	case 12000:
103 	case 16000:
104 	case 24000:
105 	case 32000:
106 	case 48000:
107 	case 96000:
108 	case 192000:
109 		/* Highest possible SYSCLK frequency: 147.456MHz */
110 		priv->sysclk_rate = 147456000U;
111 		break;
112 	case 11025:
113 	case 22050:
114 	case 44100:
115 	case 88200:
116 	case 176400:
117 		/* Highest possible SYSCLK frequency: 135.4752 MHz */
118 		priv->sysclk_rate = 135475200U;
119 		break;
120 	default:
121 		dev_err(component->dev, "Not supported sample rate: %d\n",
122 			params_rate(params));
123 		return -EINVAL;
124 	}
125 
126 	return tm2_start_sysclk(rtd->card);
127 }
128 
129 static const struct snd_soc_ops tm2_aif1_ops = {
130 	.hw_params = tm2_aif1_hw_params,
131 };
132 
133 static int tm2_aif2_hw_params(struct snd_pcm_substream *substream,
134 				struct snd_pcm_hw_params *params)
135 {
136 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
137 	struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component;
138 	unsigned int asyncclk_rate;
139 	int ret;
140 
141 	switch (params_rate(params)) {
142 	case 8000:
143 	case 12000:
144 	case 16000:
145 		/* Highest possible ASYNCCLK frequency: 49.152MHz */
146 		asyncclk_rate = 49152000U;
147 		break;
148 	case 11025:
149 		/* Highest possible ASYNCCLK frequency: 45.1584 MHz */
150 		asyncclk_rate = 45158400U;
151 		break;
152 	default:
153 		dev_err(component->dev, "Not supported sample rate: %d\n",
154 			params_rate(params));
155 		return -EINVAL;
156 	}
157 
158 	ret = snd_soc_component_set_pll(component, WM5110_FLL2_REFCLK,
159 				    ARIZONA_FLL_SRC_MCLK1,
160 				    MCLK_RATE,
161 				    asyncclk_rate);
162 	if (ret < 0) {
163 		dev_err(component->dev, "Failed to set FLL2 source: %d\n", ret);
164 		return ret;
165 	}
166 
167 	ret = snd_soc_component_set_pll(component, WM5110_FLL2,
168 				    ARIZONA_FLL_SRC_MCLK1,
169 				    MCLK_RATE,
170 				    asyncclk_rate);
171 	if (ret < 0) {
172 		dev_err(component->dev, "Failed to start FLL2: %d\n", ret);
173 		return ret;
174 	}
175 
176 	ret = snd_soc_component_set_sysclk(component, ARIZONA_CLK_ASYNCCLK,
177 				       ARIZONA_CLK_SRC_FLL2,
178 				       asyncclk_rate,
179 				       SND_SOC_CLOCK_IN);
180 	if (ret < 0) {
181 		dev_err(component->dev, "Failed to set ASYNCCLK source: %d\n", ret);
182 		return ret;
183 	}
184 
185 	return 0;
186 }
187 
188 static int tm2_aif2_hw_free(struct snd_pcm_substream *substream)
189 {
190 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
191 	struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component;
192 	int ret;
193 
194 	/* disable FLL2 */
195 	ret = snd_soc_component_set_pll(component, WM5110_FLL2, ARIZONA_FLL_SRC_MCLK1,
196 				    0, 0);
197 	if (ret < 0)
198 		dev_err(component->dev, "Failed to stop FLL2: %d\n", ret);
199 
200 	return ret;
201 }
202 
203 static const struct snd_soc_ops tm2_aif2_ops = {
204 	.hw_params = tm2_aif2_hw_params,
205 	.hw_free = tm2_aif2_hw_free,
206 };
207 
208 static int tm2_hdmi_hw_params(struct snd_pcm_substream *substream,
209 			      struct snd_pcm_hw_params *params)
210 {
211 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
212 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
213 	unsigned int bfs;
214 	int bitwidth, ret;
215 
216 	bitwidth = snd_pcm_format_width(params_format(params));
217 	if (bitwidth < 0) {
218 		dev_err(rtd->card->dev, "Invalid bit-width: %d\n", bitwidth);
219 		return bitwidth;
220 	}
221 
222 	switch (bitwidth) {
223 	case 48:
224 		bfs = 64;
225 		break;
226 	case 16:
227 		bfs = 32;
228 		break;
229 	default:
230 		dev_err(rtd->card->dev, "Unsupported bit-width: %d\n", bitwidth);
231 		return -EINVAL;
232 	}
233 
234 	switch (params_rate(params)) {
235 	case 48000:
236 	case 96000:
237 	case 192000:
238 		break;
239 	default:
240 		dev_err(rtd->card->dev, "Unsupported sample rate: %d\n",
241 			params_rate(params));
242 		return -EINVAL;
243 	}
244 
245 	ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_OPCLK,
246 					0, SAMSUNG_I2S_OPCLK_PCLK);
247 	if (ret < 0)
248 		return ret;
249 
250 	ret = snd_soc_dai_set_clkdiv(cpu_dai, SAMSUNG_I2S_DIV_BCLK, bfs);
251 	if (ret < 0)
252 		return ret;
253 
254 	return 0;
255 }
256 
257 static const struct snd_soc_ops tm2_hdmi_ops = {
258 	.hw_params = tm2_hdmi_hw_params,
259 };
260 
261 static int tm2_mic_bias(struct snd_soc_dapm_widget *w,
262 				struct snd_kcontrol *kcontrol, int event)
263 {
264 	struct snd_soc_card *card = w->dapm->card;
265 	struct tm2_machine_priv *priv = snd_soc_card_get_drvdata(card);
266 
267 	switch (event) {
268 	case SND_SOC_DAPM_PRE_PMU:
269 		gpiod_set_value_cansleep(priv->gpio_mic_bias,  1);
270 		break;
271 	case SND_SOC_DAPM_POST_PMD:
272 		gpiod_set_value_cansleep(priv->gpio_mic_bias,  0);
273 		break;
274 	}
275 
276 	return 0;
277 }
278 
279 static int tm2_set_bias_level(struct snd_soc_card *card,
280 				struct snd_soc_dapm_context *dapm,
281 				enum snd_soc_bias_level level)
282 {
283 	struct snd_soc_pcm_runtime *rtd;
284 
285 	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
286 
287 	if (dapm->dev != asoc_rtd_to_codec(rtd, 0)->dev)
288 		return 0;
289 
290 	switch (level) {
291 	case SND_SOC_BIAS_STANDBY:
292 		if (card->dapm.bias_level == SND_SOC_BIAS_OFF)
293 			tm2_start_sysclk(card);
294 		break;
295 	case SND_SOC_BIAS_OFF:
296 		tm2_stop_sysclk(card);
297 		break;
298 	default:
299 		break;
300 	}
301 
302 	return 0;
303 }
304 
305 static struct snd_soc_aux_dev tm2_speaker_amp_dev;
306 
307 static int tm2_late_probe(struct snd_soc_card *card)
308 {
309 	struct tm2_machine_priv *priv = snd_soc_card_get_drvdata(card);
310 	unsigned int ch_map[] = { 0, 1 };
311 	struct snd_soc_dai *amp_pdm_dai;
312 	struct snd_soc_pcm_runtime *rtd;
313 	struct snd_soc_dai *aif1_dai;
314 	struct snd_soc_dai *aif2_dai;
315 	int ret;
316 
317 	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[TM2_DAI_AIF1]);
318 	aif1_dai = asoc_rtd_to_codec(rtd, 0);
319 	priv->component = asoc_rtd_to_codec(rtd, 0)->component;
320 
321 	ret = snd_soc_dai_set_sysclk(aif1_dai, ARIZONA_CLK_SYSCLK, 0, 0);
322 	if (ret < 0) {
323 		dev_err(aif1_dai->dev, "Failed to set SYSCLK: %d\n", ret);
324 		return ret;
325 	}
326 
327 	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[TM2_DAI_AIF2]);
328 	aif2_dai = asoc_rtd_to_codec(rtd, 0);
329 
330 	ret = snd_soc_dai_set_sysclk(aif2_dai, ARIZONA_CLK_ASYNCCLK, 0, 0);
331 	if (ret < 0) {
332 		dev_err(aif2_dai->dev, "Failed to set ASYNCCLK: %d\n", ret);
333 		return ret;
334 	}
335 
336 	amp_pdm_dai = snd_soc_find_dai(&tm2_speaker_amp_dev.dlc);
337 	if (!amp_pdm_dai)
338 		return -ENODEV;
339 
340 	/* Set the MAX98504 V/I sense PDM Tx DAI channel mapping */
341 	ret = snd_soc_dai_set_channel_map(amp_pdm_dai, ARRAY_SIZE(ch_map),
342 					  ch_map, 0, NULL);
343 	if (ret < 0)
344 		return ret;
345 
346 	ret = snd_soc_dai_set_tdm_slot(amp_pdm_dai, 0x3, 0x0, 2, 16);
347 	if (ret < 0)
348 		return ret;
349 
350 	return 0;
351 }
352 
353 static const struct snd_kcontrol_new tm2_controls[] = {
354 	SOC_DAPM_PIN_SWITCH("HP"),
355 	SOC_DAPM_PIN_SWITCH("SPK"),
356 	SOC_DAPM_PIN_SWITCH("RCV"),
357 	SOC_DAPM_PIN_SWITCH("VPS"),
358 	SOC_DAPM_PIN_SWITCH("HDMI"),
359 
360 	SOC_DAPM_PIN_SWITCH("Main Mic"),
361 	SOC_DAPM_PIN_SWITCH("Sub Mic"),
362 	SOC_DAPM_PIN_SWITCH("Third Mic"),
363 
364 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
365 };
366 
367 static const struct snd_soc_dapm_widget tm2_dapm_widgets[] = {
368 	SND_SOC_DAPM_HP("HP", NULL),
369 	SND_SOC_DAPM_SPK("SPK", NULL),
370 	SND_SOC_DAPM_SPK("RCV", NULL),
371 	SND_SOC_DAPM_LINE("VPS", NULL),
372 	SND_SOC_DAPM_LINE("HDMI", NULL),
373 
374 	SND_SOC_DAPM_MIC("Main Mic", tm2_mic_bias),
375 	SND_SOC_DAPM_MIC("Sub Mic", NULL),
376 	SND_SOC_DAPM_MIC("Third Mic", NULL),
377 
378 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
379 };
380 
381 static const struct snd_soc_component_driver tm2_component = {
382 	.name	= "tm2-audio",
383 };
384 
385 static struct snd_soc_dai_driver tm2_ext_dai[] = {
386 	{
387 		.name = "Voice call",
388 		.playback = {
389 			.channels_min = 1,
390 			.channels_max = 4,
391 			.rate_min = 8000,
392 			.rate_max = 48000,
393 			.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
394 					SNDRV_PCM_RATE_48000),
395 			.formats = SNDRV_PCM_FMTBIT_S16_LE,
396 		},
397 		.capture = {
398 			.channels_min = 1,
399 			.channels_max = 4,
400 			.rate_min = 8000,
401 			.rate_max = 48000,
402 			.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
403 					SNDRV_PCM_RATE_48000),
404 			.formats = SNDRV_PCM_FMTBIT_S16_LE,
405 		},
406 	},
407 	{
408 		.name = "Bluetooth",
409 		.playback = {
410 			.channels_min = 1,
411 			.channels_max = 4,
412 			.rate_min = 8000,
413 			.rate_max = 16000,
414 			.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),
415 			.formats = SNDRV_PCM_FMTBIT_S16_LE,
416 		},
417 		.capture = {
418 			.channels_min = 1,
419 			.channels_max = 2,
420 			.rate_min = 8000,
421 			.rate_max = 16000,
422 			.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),
423 			.formats = SNDRV_PCM_FMTBIT_S16_LE,
424 		},
425 	},
426 };
427 
428 SND_SOC_DAILINK_DEFS(aif1,
429 	DAILINK_COMP_ARRAY(COMP_CPU(SAMSUNG_I2S_DAI)),
430 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm5110-aif1")),
431 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
432 
433 SND_SOC_DAILINK_DEFS(voice,
434 	DAILINK_COMP_ARRAY(COMP_CPU(SAMSUNG_I2S_DAI)),
435 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm5110-aif2")),
436 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
437 
438 SND_SOC_DAILINK_DEFS(bt,
439 	DAILINK_COMP_ARRAY(COMP_CPU(SAMSUNG_I2S_DAI)),
440 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm5110-aif3")),
441 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
442 
443 SND_SOC_DAILINK_DEFS(hdmi,
444 	DAILINK_COMP_ARRAY(COMP_EMPTY()),
445 	DAILINK_COMP_ARRAY(COMP_EMPTY()),
446 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
447 
448 static struct snd_soc_dai_link tm2_dai_links[] = {
449 	{
450 		.name		= "WM5110 AIF1",
451 		.stream_name	= "HiFi Primary",
452 		.ops		= &tm2_aif1_ops,
453 		.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
454 				  SND_SOC_DAIFMT_CBM_CFM,
455 		SND_SOC_DAILINK_REG(aif1),
456 	}, {
457 		.name		= "WM5110 Voice",
458 		.stream_name	= "Voice call",
459 		.ops		= &tm2_aif2_ops,
460 		.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
461 				  SND_SOC_DAIFMT_CBM_CFM,
462 		.ignore_suspend = 1,
463 		SND_SOC_DAILINK_REG(voice),
464 	}, {
465 		.name		= "WM5110 BT",
466 		.stream_name	= "Bluetooth",
467 		.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
468 				  SND_SOC_DAIFMT_CBM_CFM,
469 		.ignore_suspend = 1,
470 		SND_SOC_DAILINK_REG(bt),
471 	}, {
472 		.name		= "HDMI",
473 		.stream_name	= "i2s1",
474 		.ops		= &tm2_hdmi_ops,
475 		.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
476 				  SND_SOC_DAIFMT_CBS_CFS,
477 		SND_SOC_DAILINK_REG(hdmi),
478 	}
479 };
480 
481 static struct snd_soc_card tm2_card = {
482 	.owner			= THIS_MODULE,
483 
484 	.dai_link		= tm2_dai_links,
485 	.controls		= tm2_controls,
486 	.num_controls		= ARRAY_SIZE(tm2_controls),
487 	.dapm_widgets		= tm2_dapm_widgets,
488 	.num_dapm_widgets	= ARRAY_SIZE(tm2_dapm_widgets),
489 	.aux_dev		= &tm2_speaker_amp_dev,
490 	.num_aux_devs		= 1,
491 
492 	.late_probe		= tm2_late_probe,
493 	.set_bias_level		= tm2_set_bias_level,
494 };
495 
496 static int tm2_probe(struct platform_device *pdev)
497 {
498 	struct device_node *cpu_dai_node[2] = {};
499 	struct device_node *codec_dai_node[2] = {};
500 	const char *cells_name = NULL;
501 	struct device *dev = &pdev->dev;
502 	struct snd_soc_card *card = &tm2_card;
503 	struct tm2_machine_priv *priv;
504 	struct snd_soc_dai_link *dai_link;
505 	int num_codecs, ret, i;
506 
507 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
508 	if (!priv)
509 		return -ENOMEM;
510 
511 	snd_soc_card_set_drvdata(card, priv);
512 	card->dev = dev;
513 
514 	priv->gpio_mic_bias = devm_gpiod_get(dev, "mic-bias", GPIOD_OUT_HIGH);
515 	if (IS_ERR(priv->gpio_mic_bias)) {
516 		dev_err(dev, "Failed to get mic bias gpio\n");
517 		return PTR_ERR(priv->gpio_mic_bias);
518 	}
519 
520 	ret = snd_soc_of_parse_card_name(card, "model");
521 	if (ret < 0) {
522 		dev_err(dev, "Card name is not specified\n");
523 		return ret;
524 	}
525 
526 	ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
527 	if (ret < 0) {
528 		/* Backwards compatible way */
529 		ret = snd_soc_of_parse_audio_routing(card, "samsung,audio-routing");
530 		if (ret < 0) {
531 			dev_err(dev, "Audio routing is not specified or invalid\n");
532 			return ret;
533 		}
534 	}
535 
536 	card->aux_dev[0].dlc.of_node = of_parse_phandle(dev->of_node,
537 							"audio-amplifier", 0);
538 	if (!card->aux_dev[0].dlc.of_node) {
539 		dev_err(dev, "audio-amplifier property invalid or missing\n");
540 		return -EINVAL;
541 	}
542 
543 	num_codecs = of_count_phandle_with_args(dev->of_node, "audio-codec",
544 						 NULL);
545 
546 	/* Skip the HDMI link if not specified in DT */
547 	if (num_codecs > 1) {
548 		card->num_links = ARRAY_SIZE(tm2_dai_links);
549 		cells_name = "#sound-dai-cells";
550 	} else {
551 		card->num_links = ARRAY_SIZE(tm2_dai_links) - 1;
552 	}
553 
554 	for (i = 0; i < num_codecs; i++) {
555 		struct of_phandle_args args;
556 
557 		ret = of_parse_phandle_with_args(dev->of_node, "i2s-controller",
558 						 cells_name, i, &args);
559 		if (ret) {
560 			dev_err(dev, "i2s-controller property parse error: %d\n", i);
561 			ret = -EINVAL;
562 			goto dai_node_put;
563 		}
564 		cpu_dai_node[i] = args.np;
565 
566 		codec_dai_node[i] = of_parse_phandle(dev->of_node,
567 						     "audio-codec", i);
568 		if (!codec_dai_node[i]) {
569 			dev_err(dev, "audio-codec property parse error\n");
570 			ret = -EINVAL;
571 			goto dai_node_put;
572 		}
573 	}
574 
575 	/* Initialize WM5110 - I2S and HDMI - I2S1 DAI links */
576 	for_each_card_prelinks(card, i, dai_link) {
577 		unsigned int dai_index = 0; /* WM5110 */
578 
579 		dai_link->cpus->name = NULL;
580 		dai_link->platforms->name = NULL;
581 
582 		if (num_codecs > 1 && i == card->num_links - 1)
583 			dai_index = 1; /* HDMI */
584 
585 		dai_link->codecs->of_node = codec_dai_node[dai_index];
586 		dai_link->cpus->of_node = cpu_dai_node[dai_index];
587 		dai_link->platforms->of_node = cpu_dai_node[dai_index];
588 	}
589 
590 	if (num_codecs > 1) {
591 		struct of_phandle_args args;
592 
593 		/* HDMI DAI link (I2S1) */
594 		i = card->num_links - 1;
595 
596 		ret = of_parse_phandle_with_fixed_args(dev->of_node,
597 						"audio-codec", 0, 1, &args);
598 		if (ret) {
599 			dev_err(dev, "audio-codec property parse error\n");
600 			goto dai_node_put;
601 		}
602 
603 		ret = snd_soc_get_dai_name(&args, &card->dai_link[i].codecs->dai_name);
604 		if (ret) {
605 			dev_err(dev, "Unable to get codec_dai_name\n");
606 			goto dai_node_put;
607 		}
608 	}
609 
610 	ret = devm_snd_soc_register_component(dev, &tm2_component,
611 				tm2_ext_dai, ARRAY_SIZE(tm2_ext_dai));
612 	if (ret < 0) {
613 		dev_err(dev, "Failed to register component: %d\n", ret);
614 		goto dai_node_put;
615 	}
616 
617 	ret = devm_snd_soc_register_card(dev, card);
618 	if (ret < 0) {
619 		dev_err_probe(dev, ret, "Failed to register card\n");
620 		goto dai_node_put;
621 	}
622 
623 dai_node_put:
624 	for (i = 0; i < num_codecs; i++) {
625 		of_node_put(codec_dai_node[i]);
626 		of_node_put(cpu_dai_node[i]);
627 	}
628 
629 	of_node_put(card->aux_dev[0].dlc.of_node);
630 
631 	return ret;
632 }
633 
634 static int tm2_pm_prepare(struct device *dev)
635 {
636 	struct snd_soc_card *card = dev_get_drvdata(dev);
637 
638 	return tm2_stop_sysclk(card);
639 }
640 
641 static void tm2_pm_complete(struct device *dev)
642 {
643 	struct snd_soc_card *card = dev_get_drvdata(dev);
644 
645 	tm2_start_sysclk(card);
646 }
647 
648 static const struct dev_pm_ops tm2_pm_ops = {
649 	.prepare	= tm2_pm_prepare,
650 	.suspend	= snd_soc_suspend,
651 	.resume		= snd_soc_resume,
652 	.complete	= tm2_pm_complete,
653 	.freeze		= snd_soc_suspend,
654 	.thaw		= snd_soc_resume,
655 	.poweroff	= snd_soc_poweroff,
656 	.restore	= snd_soc_resume,
657 };
658 
659 static const struct of_device_id tm2_of_match[] = {
660 	{ .compatible = "samsung,tm2-audio" },
661 	{ },
662 };
663 MODULE_DEVICE_TABLE(of, tm2_of_match);
664 
665 static struct platform_driver tm2_driver = {
666 	.driver = {
667 		.name		= "tm2-audio",
668 		.pm		= &tm2_pm_ops,
669 		.of_match_table	= tm2_of_match,
670 	},
671 	.probe	= tm2_probe,
672 };
673 module_platform_driver(tm2_driver);
674 
675 MODULE_AUTHOR("Inha Song <ideal.song@samsung.com>");
676 MODULE_DESCRIPTION("ALSA SoC Exynos TM2 Audio Support");
677 MODULE_LICENSE("GPL v2");
678