1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // ASoC audio graph sound card support
4 //
5 // Copyright (C) 2016 Renesas Solutions Corp.
6 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7 //
8 // based on ${LINUX}/sound/soc/generic/simple-card.c
9 
10 #include <linux/clk.h>
11 #include <linux/device.h>
12 #include <linux/gpio.h>
13 #include <linux/gpio/consumer.h>
14 #include <linux/module.h>
15 #include <linux/of.h>
16 #include <linux/of_device.h>
17 #include <linux/of_gpio.h>
18 #include <linux/of_graph.h>
19 #include <linux/platform_device.h>
20 #include <linux/string.h>
21 #include <sound/graph_card.h>
22 
23 #define DPCM_SELECTABLE 1
24 
25 static int graph_outdrv_event(struct snd_soc_dapm_widget *w,
26 			      struct snd_kcontrol *kcontrol,
27 			      int event)
28 {
29 	struct snd_soc_dapm_context *dapm = w->dapm;
30 	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(dapm->card);
31 
32 	switch (event) {
33 	case SND_SOC_DAPM_POST_PMU:
34 		gpiod_set_value_cansleep(priv->pa_gpio, 1);
35 		break;
36 	case SND_SOC_DAPM_PRE_PMD:
37 		gpiod_set_value_cansleep(priv->pa_gpio, 0);
38 		break;
39 	default:
40 		return -EINVAL;
41 	}
42 
43 	return 0;
44 }
45 
46 static const struct snd_soc_dapm_widget graph_dapm_widgets[] = {
47 	SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM,
48 			       0, 0, NULL, 0, graph_outdrv_event,
49 			       SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
50 };
51 
52 static const struct snd_soc_ops graph_ops = {
53 	.startup	= asoc_simple_startup,
54 	.shutdown	= asoc_simple_shutdown,
55 	.hw_params	= asoc_simple_hw_params,
56 };
57 
58 static bool soc_component_is_pcm(struct snd_soc_dai_link_component *dlc)
59 {
60 	struct snd_soc_dai *dai = snd_soc_find_dai_with_mutex(dlc);
61 
62 	if (dai && (dai->component->driver->pcm_construct ||
63 		    (dai->driver->ops && dai->driver->ops->pcm_new)))
64 		return true;
65 
66 	return false;
67 }
68 
69 static void graph_parse_convert(struct device *dev,
70 				struct device_node *ep,
71 				struct asoc_simple_data *adata)
72 {
73 	struct device_node *top = dev->of_node;
74 	struct device_node *port = of_get_parent(ep);
75 	struct device_node *ports = of_get_parent(port);
76 	struct device_node *node = of_graph_get_port_parent(ep);
77 
78 	asoc_simple_parse_convert(top,   NULL,   adata);
79 	if (of_node_name_eq(ports, "ports"))
80 		asoc_simple_parse_convert(ports, NULL, adata);
81 	asoc_simple_parse_convert(port,  NULL,   adata);
82 	asoc_simple_parse_convert(ep,    NULL,   adata);
83 
84 	of_node_put(port);
85 	of_node_put(ports);
86 	of_node_put(node);
87 }
88 
89 static void graph_parse_mclk_fs(struct device_node *top,
90 				struct device_node *ep,
91 				struct simple_dai_props *props)
92 {
93 	struct device_node *port	= of_get_parent(ep);
94 	struct device_node *ports	= of_get_parent(port);
95 
96 	of_property_read_u32(top,	"mclk-fs", &props->mclk_fs);
97 	if (of_node_name_eq(ports, "ports"))
98 		of_property_read_u32(ports, "mclk-fs", &props->mclk_fs);
99 	of_property_read_u32(port,	"mclk-fs", &props->mclk_fs);
100 	of_property_read_u32(ep,	"mclk-fs", &props->mclk_fs);
101 
102 	of_node_put(port);
103 	of_node_put(ports);
104 }
105 
106 static int graph_parse_node(struct asoc_simple_priv *priv,
107 			    struct device_node *ep,
108 			    struct link_info *li,
109 			    int *cpu)
110 {
111 	struct device *dev = simple_priv_to_dev(priv);
112 	struct device_node *top = dev->of_node;
113 	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
114 	struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
115 	struct snd_soc_dai_link_component *dlc;
116 	struct asoc_simple_dai *dai;
117 	int ret;
118 
119 	if (cpu) {
120 		dlc = asoc_link_to_cpu(dai_link, 0);
121 		dai = simple_props_to_dai_cpu(dai_props, 0);
122 	} else {
123 		dlc = asoc_link_to_codec(dai_link, 0);
124 		dai = simple_props_to_dai_codec(dai_props, 0);
125 	}
126 
127 	graph_parse_mclk_fs(top, ep, dai_props);
128 
129 	ret = asoc_graph_parse_dai(dev, ep, dlc, cpu);
130 	if (ret < 0)
131 		return ret;
132 
133 	ret = asoc_simple_parse_tdm(ep, dai);
134 	if (ret < 0)
135 		return ret;
136 
137 	ret = asoc_simple_parse_clk(dev, ep, dai, dlc);
138 	if (ret < 0)
139 		return ret;
140 
141 	return 0;
142 }
143 
144 static int graph_link_init(struct asoc_simple_priv *priv,
145 			   struct device_node *cpu_ep,
146 			   struct device_node *codec_ep,
147 			   struct link_info *li,
148 			   char *name)
149 {
150 	struct device *dev = simple_priv_to_dev(priv);
151 	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
152 	int ret;
153 
154 	ret = asoc_simple_parse_daifmt(dev, cpu_ep, codec_ep,
155 				       NULL, &dai_link->dai_fmt);
156 	if (ret < 0)
157 		return ret;
158 
159 	dai_link->init		= asoc_simple_dai_init;
160 	dai_link->ops		= &graph_ops;
161 	if (priv->ops)
162 		dai_link->ops	= priv->ops;
163 
164 	return asoc_simple_set_dailink_name(dev, dai_link, name);
165 }
166 
167 static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv,
168 				  struct device_node *cpu_ep,
169 				  struct device_node *codec_ep,
170 				  struct link_info *li)
171 {
172 	struct device *dev = simple_priv_to_dev(priv);
173 	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
174 	struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
175 	struct device_node *top = dev->of_node;
176 	struct device_node *ep = li->cpu ? cpu_ep : codec_ep;
177 	char dai_name[64];
178 	int ret;
179 
180 	dev_dbg(dev, "link_of DPCM (%pOF)\n", ep);
181 
182 	if (li->cpu) {
183 		struct snd_soc_card *card = simple_priv_to_card(priv);
184 		struct snd_soc_dai_link_component *cpus = asoc_link_to_cpu(dai_link, 0);
185 		struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, 0);
186 		int is_single_links = 0;
187 
188 		/* Codec is dummy */
189 
190 		/* FE settings */
191 		dai_link->dynamic		= 1;
192 		dai_link->dpcm_merged_format	= 1;
193 
194 		ret = graph_parse_node(priv, cpu_ep, li, &is_single_links);
195 		if (ret)
196 			return ret;
197 
198 		snprintf(dai_name, sizeof(dai_name),
199 			 "fe.%pOFP.%s", cpus->of_node, cpus->dai_name);
200 		/*
201 		 * In BE<->BE connections it is not required to create
202 		 * PCM devices at CPU end of the dai link and thus 'no_pcm'
203 		 * flag needs to be set. It is useful when there are many
204 		 * BE components and some of these have to be connected to
205 		 * form a valid audio path.
206 		 *
207 		 * For example: FE <-> BE1 <-> BE2 <-> ... <-> BEn where
208 		 * there are 'n' BE components in the path.
209 		 */
210 		if (card->component_chaining && !soc_component_is_pcm(cpus)) {
211 			dai_link->no_pcm = 1;
212 			dai_link->be_hw_params_fixup = asoc_simple_be_hw_params_fixup;
213 		}
214 
215 		asoc_simple_canonicalize_cpu(cpus, is_single_links);
216 		asoc_simple_canonicalize_platform(platforms, cpus);
217 	} else {
218 		struct snd_soc_codec_conf *cconf = simple_props_to_codec_conf(dai_props, 0);
219 		struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, 0);
220 		struct device_node *port;
221 		struct device_node *ports;
222 
223 		/* CPU is dummy */
224 
225 		/* BE settings */
226 		dai_link->no_pcm		= 1;
227 		dai_link->be_hw_params_fixup	= asoc_simple_be_hw_params_fixup;
228 
229 		ret = graph_parse_node(priv, codec_ep, li, NULL);
230 		if (ret < 0)
231 			return ret;
232 
233 		snprintf(dai_name, sizeof(dai_name),
234 			 "be.%pOFP.%s", codecs->of_node, codecs->dai_name);
235 
236 		/* check "prefix" from top node */
237 		port = of_get_parent(ep);
238 		ports = of_get_parent(port);
239 		snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node,
240 					      "prefix");
241 		if (of_node_name_eq(ports, "ports"))
242 			snd_soc_of_parse_node_prefix(ports, cconf, codecs->of_node, "prefix");
243 		snd_soc_of_parse_node_prefix(port, cconf, codecs->of_node,
244 					     "prefix");
245 
246 		of_node_put(ports);
247 		of_node_put(port);
248 	}
249 
250 	graph_parse_convert(dev, ep, &dai_props->adata);
251 
252 	snd_soc_dai_link_set_capabilities(dai_link);
253 
254 	ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name);
255 
256 	li->link++;
257 
258 	return ret;
259 }
260 
261 static int graph_dai_link_of(struct asoc_simple_priv *priv,
262 			     struct device_node *cpu_ep,
263 			     struct device_node *codec_ep,
264 			     struct link_info *li)
265 {
266 	struct device *dev = simple_priv_to_dev(priv);
267 	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
268 	struct snd_soc_dai_link_component *cpus = asoc_link_to_cpu(dai_link, 0);
269 	struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, 0);
270 	struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, 0);
271 	char dai_name[64];
272 	int ret, is_single_links = 0;
273 
274 	dev_dbg(dev, "link_of (%pOF)\n", cpu_ep);
275 
276 	ret = graph_parse_node(priv, cpu_ep, li, &is_single_links);
277 	if (ret < 0)
278 		return ret;
279 
280 	ret = graph_parse_node(priv, codec_ep, li, NULL);
281 	if (ret < 0)
282 		return ret;
283 
284 	snprintf(dai_name, sizeof(dai_name),
285 		 "%s-%s", cpus->dai_name, codecs->dai_name);
286 
287 	asoc_simple_canonicalize_cpu(cpus, is_single_links);
288 	asoc_simple_canonicalize_platform(platforms, cpus);
289 
290 	ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name);
291 	if (ret < 0)
292 		return ret;
293 
294 	li->link++;
295 
296 	return 0;
297 }
298 
299 static inline bool parse_as_dpcm_link(struct asoc_simple_priv *priv,
300 				      struct device_node *codec_port,
301 				      struct asoc_simple_data *adata)
302 {
303 	if (priv->force_dpcm)
304 		return true;
305 
306 	if (!priv->dpcm_selectable)
307 		return false;
308 
309 	/*
310 	 * It is DPCM
311 	 * if Codec port has many endpoints,
312 	 * or has convert-xxx property
313 	 */
314 	if ((of_get_child_count(codec_port) > 1) ||
315 	    asoc_simple_is_convert_required(adata))
316 		return true;
317 
318 	return false;
319 }
320 
321 static int __graph_for_each_link(struct asoc_simple_priv *priv,
322 			struct link_info *li,
323 			int (*func_noml)(struct asoc_simple_priv *priv,
324 					 struct device_node *cpu_ep,
325 					 struct device_node *codec_ep,
326 					 struct link_info *li),
327 			int (*func_dpcm)(struct asoc_simple_priv *priv,
328 					 struct device_node *cpu_ep,
329 					 struct device_node *codec_ep,
330 					 struct link_info *li))
331 {
332 	struct of_phandle_iterator it;
333 	struct device *dev = simple_priv_to_dev(priv);
334 	struct device_node *node = dev->of_node;
335 	struct device_node *cpu_port;
336 	struct device_node *cpu_ep;
337 	struct device_node *codec_ep;
338 	struct device_node *codec_port;
339 	struct device_node *codec_port_old = NULL;
340 	struct asoc_simple_data adata;
341 	int rc, ret = 0;
342 
343 	/* loop for all listed CPU port */
344 	of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
345 		cpu_port = it.node;
346 		cpu_ep	 = NULL;
347 
348 		/* loop for all CPU endpoint */
349 		while (1) {
350 			cpu_ep = of_get_next_child(cpu_port, cpu_ep);
351 			if (!cpu_ep)
352 				break;
353 
354 			/* get codec */
355 			codec_ep = of_graph_get_remote_endpoint(cpu_ep);
356 			codec_port = of_get_parent(codec_ep);
357 
358 			/* get convert-xxx property */
359 			memset(&adata, 0, sizeof(adata));
360 			graph_parse_convert(dev, codec_ep, &adata);
361 			graph_parse_convert(dev, cpu_ep,   &adata);
362 
363 			/* check if link requires DPCM parsing */
364 			if (parse_as_dpcm_link(priv, codec_port, &adata)) {
365 				/*
366 				 * Codec endpoint can be NULL for pluggable audio HW.
367 				 * Platform DT can populate the Codec endpoint depending on the
368 				 * plugged HW.
369 				 */
370 				/* Do it all CPU endpoint, and 1st Codec endpoint */
371 				if (li->cpu ||
372 				    ((codec_port_old != codec_port) && codec_ep))
373 					ret = func_dpcm(priv, cpu_ep, codec_ep, li);
374 			/* else normal sound */
375 			} else {
376 				if (li->cpu)
377 					ret = func_noml(priv, cpu_ep, codec_ep, li);
378 			}
379 
380 			of_node_put(codec_ep);
381 			of_node_put(codec_port);
382 
383 			if (ret < 0) {
384 				of_node_put(cpu_ep);
385 				return ret;
386 			}
387 
388 			codec_port_old = codec_port;
389 		}
390 	}
391 
392 	return 0;
393 }
394 
395 static int graph_for_each_link(struct asoc_simple_priv *priv,
396 			       struct link_info *li,
397 			       int (*func_noml)(struct asoc_simple_priv *priv,
398 						struct device_node *cpu_ep,
399 						struct device_node *codec_ep,
400 						struct link_info *li),
401 			       int (*func_dpcm)(struct asoc_simple_priv *priv,
402 						struct device_node *cpu_ep,
403 						struct device_node *codec_ep,
404 						struct link_info *li))
405 {
406 	int ret;
407 	/*
408 	 * Detect all CPU first, and Detect all Codec 2nd.
409 	 *
410 	 * In Normal sound case, all DAIs are detected
411 	 * as "CPU-Codec".
412 	 *
413 	 * In DPCM sound case,
414 	 * all CPUs   are detected as "CPU-dummy", and
415 	 * all Codecs are detected as "dummy-Codec".
416 	 * To avoid random sub-device numbering,
417 	 * detect "dummy-Codec" in last;
418 	 */
419 	for (li->cpu = 1; li->cpu >= 0; li->cpu--) {
420 		ret = __graph_for_each_link(priv, li, func_noml, func_dpcm);
421 		if (ret < 0)
422 			break;
423 	}
424 
425 	return ret;
426 }
427 
428 static int graph_count_noml(struct asoc_simple_priv *priv,
429 			    struct device_node *cpu_ep,
430 			    struct device_node *codec_ep,
431 			    struct link_info *li)
432 {
433 	struct device *dev = simple_priv_to_dev(priv);
434 
435 	if (li->link >= SNDRV_MAX_LINKS) {
436 		dev_err(dev, "too many links\n");
437 		return -EINVAL;
438 	}
439 
440 	/*
441 	 * DON'T REMOVE platforms
442 	 * see
443 	 *	simple-card.c :: simple_count_noml()
444 	 */
445 	li->num[li->link].cpus		= 1;
446 	li->num[li->link].platforms     = 1;
447 
448 	li->num[li->link].codecs	= 1;
449 
450 	li->link += 1; /* 1xCPU-Codec */
451 
452 	dev_dbg(dev, "Count As Normal\n");
453 
454 	return 0;
455 }
456 
457 static int graph_count_dpcm(struct asoc_simple_priv *priv,
458 			    struct device_node *cpu_ep,
459 			    struct device_node *codec_ep,
460 			    struct link_info *li)
461 {
462 	struct device *dev = simple_priv_to_dev(priv);
463 
464 	if (li->link >= SNDRV_MAX_LINKS) {
465 		dev_err(dev, "too many links\n");
466 		return -EINVAL;
467 	}
468 
469 	if (li->cpu) {
470 		/*
471 		 * DON'T REMOVE platforms
472 		 * see
473 		 *	simple-card.c :: simple_count_noml()
474 		 */
475 		li->num[li->link].cpus		= 1;
476 		li->num[li->link].platforms     = 1;
477 
478 		li->link++; /* 1xCPU-dummy */
479 	} else {
480 		li->num[li->link].codecs	= 1;
481 
482 		li->link++; /* 1xdummy-Codec */
483 	}
484 
485 	dev_dbg(dev, "Count As DPCM\n");
486 
487 	return 0;
488 }
489 
490 static int graph_get_dais_count(struct asoc_simple_priv *priv,
491 				struct link_info *li)
492 {
493 	/*
494 	 * link_num :	number of links.
495 	 *		CPU-Codec / CPU-dummy / dummy-Codec
496 	 * dais_num :	number of DAIs
497 	 * ccnf_num :	number of codec_conf
498 	 *		same number for "dummy-Codec"
499 	 *
500 	 * ex1)
501 	 * CPU0 --- Codec0	link : 5
502 	 * CPU1 --- Codec1	dais : 7
503 	 * CPU2 -/		ccnf : 1
504 	 * CPU3 --- Codec2
505 	 *
506 	 *	=> 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec
507 	 *	=> 7 DAIs  = 4xCPU + 3xCodec
508 	 *	=> 1 ccnf  = 1xdummy-Codec
509 	 *
510 	 * ex2)
511 	 * CPU0 --- Codec0	link : 5
512 	 * CPU1 --- Codec1	dais : 6
513 	 * CPU2 -/		ccnf : 1
514 	 * CPU3 -/
515 	 *
516 	 *	=> 5 links = 1xCPU-Codec + 3xCPU-dummy + 1xdummy-Codec
517 	 *	=> 6 DAIs  = 4xCPU + 2xCodec
518 	 *	=> 1 ccnf  = 1xdummy-Codec
519 	 *
520 	 * ex3)
521 	 * CPU0 --- Codec0	link : 6
522 	 * CPU1 -/		dais : 6
523 	 * CPU2 --- Codec1	ccnf : 2
524 	 * CPU3 -/
525 	 *
526 	 *	=> 6 links = 0xCPU-Codec + 4xCPU-dummy + 2xdummy-Codec
527 	 *	=> 6 DAIs  = 4xCPU + 2xCodec
528 	 *	=> 2 ccnf  = 2xdummy-Codec
529 	 *
530 	 * ex4)
531 	 * CPU0 --- Codec0 (convert-rate)	link : 3
532 	 * CPU1 --- Codec1			dais : 4
533 	 *					ccnf : 1
534 	 *
535 	 *	=> 3 links = 1xCPU-Codec + 1xCPU-dummy + 1xdummy-Codec
536 	 *	=> 4 DAIs  = 2xCPU + 2xCodec
537 	 *	=> 1 ccnf  = 1xdummy-Codec
538 	 */
539 	return graph_for_each_link(priv, li,
540 				   graph_count_noml,
541 				   graph_count_dpcm);
542 }
543 
544 int audio_graph_parse_of(struct asoc_simple_priv *priv, struct device *dev)
545 {
546 	struct snd_soc_card *card = simple_priv_to_card(priv);
547 	struct link_info *li;
548 	int ret;
549 
550 	li = devm_kzalloc(dev, sizeof(*li), GFP_KERNEL);
551 	if (!li)
552 		return -ENOMEM;
553 
554 	card->owner = THIS_MODULE;
555 	card->dev = dev;
556 
557 	ret = graph_get_dais_count(priv, li);
558 	if (ret < 0)
559 		return ret;
560 
561 	if (!li->link)
562 		return -EINVAL;
563 
564 	ret = asoc_simple_init_priv(priv, li);
565 	if (ret < 0)
566 		return ret;
567 
568 	priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW);
569 	if (IS_ERR(priv->pa_gpio)) {
570 		ret = PTR_ERR(priv->pa_gpio);
571 		dev_err(dev, "failed to get amplifier gpio: %d\n", ret);
572 		return ret;
573 	}
574 
575 	ret = asoc_simple_parse_widgets(card, NULL);
576 	if (ret < 0)
577 		return ret;
578 
579 	ret = asoc_simple_parse_routing(card, NULL);
580 	if (ret < 0)
581 		return ret;
582 
583 	memset(li, 0, sizeof(*li));
584 	ret = graph_for_each_link(priv, li,
585 				  graph_dai_link_of,
586 				  graph_dai_link_of_dpcm);
587 	if (ret < 0)
588 		goto err;
589 
590 	ret = asoc_simple_parse_card_name(card, NULL);
591 	if (ret < 0)
592 		goto err;
593 
594 	snd_soc_card_set_drvdata(card, priv);
595 
596 	asoc_simple_debug_info(priv);
597 
598 	ret = devm_snd_soc_register_card(dev, card);
599 	if (ret < 0)
600 		goto err;
601 
602 	devm_kfree(dev, li);
603 	return 0;
604 
605 err:
606 	asoc_simple_clean_reference(card);
607 
608 	return dev_err_probe(dev, ret, "parse error\n");
609 }
610 EXPORT_SYMBOL_GPL(audio_graph_parse_of);
611 
612 static int graph_probe(struct platform_device *pdev)
613 {
614 	struct asoc_simple_priv *priv;
615 	struct device *dev = &pdev->dev;
616 	struct snd_soc_card *card;
617 
618 	/* Allocate the private data and the DAI link array */
619 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
620 	if (!priv)
621 		return -ENOMEM;
622 
623 	card = simple_priv_to_card(priv);
624 	card->dapm_widgets	= graph_dapm_widgets;
625 	card->num_dapm_widgets	= ARRAY_SIZE(graph_dapm_widgets);
626 	card->probe		= asoc_graph_card_probe;
627 
628 	if (of_device_get_match_data(dev))
629 		priv->dpcm_selectable = 1;
630 
631 	return audio_graph_parse_of(priv, dev);
632 }
633 
634 static const struct of_device_id graph_of_match[] = {
635 	{ .compatible = "audio-graph-card", },
636 	{ .compatible = "audio-graph-scu-card",
637 	  .data = (void *)DPCM_SELECTABLE },
638 	{},
639 };
640 MODULE_DEVICE_TABLE(of, graph_of_match);
641 
642 static struct platform_driver graph_card = {
643 	.driver = {
644 		.name = "asoc-audio-graph-card",
645 		.pm = &snd_soc_pm_ops,
646 		.of_match_table = graph_of_match,
647 	},
648 	.probe = graph_probe,
649 	.remove = asoc_simple_remove,
650 };
651 module_platform_driver(graph_card);
652 
653 MODULE_ALIAS("platform:asoc-audio-graph-card");
654 MODULE_LICENSE("GPL v2");
655 MODULE_DESCRIPTION("ASoC Audio Graph Sound Card");
656 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
657