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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
25static 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
46static 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
52static 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
58static int graph_get_dai_id(struct device_node *ep)
59{
60 struct device_node *node;
61 struct device_node *endpoint;
62 struct of_endpoint info;
63 int i, id;
64 const u32 *reg;
65 int ret;
66
67 /* use driver specified DAI ID if exist */
68 ret = snd_soc_get_dai_id(ep);
69 if (ret != -ENOTSUPP)
70 return ret;
71
72 /* use endpoint/port reg if exist */
73 ret = of_graph_parse_endpoint(ep, &info);
74 if (ret == 0) {
75 /*
76 * Because it will count port/endpoint if it doesn't have "reg".
77 * But, we can't judge whether it has "no reg", or "reg = <0>"
78 * only of_graph_parse_endpoint().
79 * We need to check "reg" property
80 */
81 if (of_get_property(ep, "reg", NULL))
82 return info.id;
83
84 node = of_get_parent(ep);
85 reg = of_get_property(node, "reg", NULL);
86 of_node_put(node);
87 if (reg)
88 return info.port;
89 }
90 node = of_graph_get_port_parent(ep);
91
92 /*
93 * Non HDMI sound case, counting port/endpoint on its DT
94 * is enough. Let's count it.
95 */
96 i = 0;
97 id = -1;
98 for_each_endpoint_of_node(node, endpoint) {
99 if (endpoint == ep)
100 id = i;
101 i++;
102 }
103
104 of_node_put(node);
105
106 if (id < 0)
107 return -ENODEV;
108
109 return id;
110}
111
112static bool soc_component_is_pcm(struct snd_soc_dai_link_component *dlc)
113{
114 struct snd_soc_dai *dai = snd_soc_find_dai_with_mutex(dlc);
115
116 if (dai && (dai->component->driver->pcm_construct ||
117 dai->driver->pcm_new))
118 return true;
119
120 return false;
121}
122
123static int asoc_simple_parse_dai(struct device_node *ep,
124 struct snd_soc_dai_link_component *dlc,
125 int *is_single_link)
126{
127 struct device_node *node;
128 struct of_phandle_args args;
129 int ret;
130
131 if (!ep)
132 return 0;
133
134 node = of_graph_get_port_parent(ep);
135
136 /* Get dai->name */
137 args.np = node;
138 args.args[0] = graph_get_dai_id(ep);
139 args.args_count = (of_graph_get_endpoint_count(node) > 1);
140
141 /*
142 * FIXME
143 *
144 * Here, dlc->dai_name is pointer to CPU/Codec DAI name.
145 * If user unbinded CPU or Codec driver, but not for Sound Card,
146 * dlc->dai_name is keeping unbinded CPU or Codec
147 * driver's pointer.
148 *
149 * If user re-bind CPU or Codec driver again, ALSA SoC will try
150 * to rebind Card via snd_soc_try_rebind_card(), but because of
151 * above reason, it might can't bind Sound Card.
152 * Because Sound Card is pointing to released dai_name pointer.
153 *
154 * To avoid this rebind Card issue,
155 * 1) It needs to alloc memory to keep dai_name eventhough
156 * CPU or Codec driver was unbinded, or
157 * 2) user need to rebind Sound Card everytime
158 * if he unbinded CPU or Codec.
159 */
160 ret = snd_soc_get_dai_name(&args, &dlc->dai_name);
161 if (ret < 0) {
162 of_node_put(node);
163 return ret;
164 }
165
166 dlc->of_node = node;
167
168 if (is_single_link)
169 *is_single_link = of_graph_get_endpoint_count(node) == 1;
170
171 return 0;
172}
173
174static void graph_parse_convert(struct device *dev,
175 struct device_node *ep,
176 struct asoc_simple_data *adata)
177{
178 struct device_node *top = dev->of_node;
179 struct device_node *port = of_get_parent(ep);
180 struct device_node *ports = of_get_parent(port);
181 struct device_node *node = of_graph_get_port_parent(ep);
182
183 asoc_simple_parse_convert(top, NULL, adata);
184 if (of_node_name_eq(ports, "ports"))
185 asoc_simple_parse_convert(ports, NULL, adata);
186 asoc_simple_parse_convert(port, NULL, adata);
187 asoc_simple_parse_convert(ep, NULL, adata);
188
189 of_node_put(port);
190 of_node_put(ports);
191 of_node_put(node);
192}
193
194static void graph_parse_mclk_fs(struct device_node *top,
195 struct device_node *ep,
196 struct simple_dai_props *props)
197{
198 struct device_node *port = of_get_parent(ep);
199 struct device_node *ports = of_get_parent(port);
200
201 of_property_read_u32(top, "mclk-fs", &props->mclk_fs);
202 if (of_node_name_eq(ports, "ports"))
203 of_property_read_u32(ports, "mclk-fs", &props->mclk_fs);
204 of_property_read_u32(port, "mclk-fs", &props->mclk_fs);
205 of_property_read_u32(ep, "mclk-fs", &props->mclk_fs);
206
207 of_node_put(port);
208 of_node_put(ports);
209}
210
211static int graph_parse_node(struct asoc_simple_priv *priv,
212 struct device_node *ep,
213 struct link_info *li,
214 int *cpu)
215{
216 struct device *dev = simple_priv_to_dev(priv);
217 struct device_node *top = dev->of_node;
218 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
219 struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
220 struct snd_soc_dai_link_component *dlc;
221 struct asoc_simple_dai *dai;
222 int ret;
223
224 if (cpu) {
225 dlc = asoc_link_to_cpu(dai_link, 0);
226 dai = simple_props_to_dai_cpu(dai_props, 0);
227 } else {
228 dlc = asoc_link_to_codec(dai_link, 0);
229 dai = simple_props_to_dai_codec(dai_props, 0);
230 }
231
232 graph_parse_mclk_fs(top, ep, dai_props);
233
234 ret = asoc_simple_parse_dai(ep, dlc, cpu);
235 if (ret < 0)
236 return ret;
237
238 ret = asoc_simple_parse_tdm(ep, dai);
239 if (ret < 0)
240 return ret;
241
242 ret = asoc_simple_parse_clk(dev, ep, dai, dlc);
243 if (ret < 0)
244 return ret;
245
246 return 0;
247}
248
249static int graph_link_init(struct asoc_simple_priv *priv,
250 struct device_node *cpu_ep,
251 struct device_node *codec_ep,
252 struct link_info *li,
253 char *name)
254{
255 struct device *dev = simple_priv_to_dev(priv);
256 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
257 int ret;
258
259 ret = asoc_simple_parse_daifmt(dev, cpu_ep, codec_ep,
260 NULL, &dai_link->dai_fmt);
261 if (ret < 0)
262 return ret;
263
264 dai_link->init = asoc_simple_dai_init;
265 dai_link->ops = &graph_ops;
266 if (priv->ops)
267 dai_link->ops = priv->ops;
268
269 return asoc_simple_set_dailink_name(dev, dai_link, name);
270}
271
272static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv,
273 struct device_node *cpu_ep,
274 struct device_node *codec_ep,
275 struct link_info *li)
276{
277 struct device *dev = simple_priv_to_dev(priv);
278 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
279 struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
280 struct device_node *top = dev->of_node;
281 struct device_node *ep = li->cpu ? cpu_ep : codec_ep;
282 char dai_name[64];
283 int ret;
284
285 dev_dbg(dev, "link_of DPCM (%pOF)\n", ep);
286
287 if (li->cpu) {
288 struct snd_soc_card *card = simple_priv_to_card(priv);
289 struct snd_soc_dai_link_component *cpus = asoc_link_to_cpu(dai_link, 0);
290 struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, 0);
291 int is_single_links = 0;
292
293 /* Codec is dummy */
294
295 /* FE settings */
296 dai_link->dynamic = 1;
297 dai_link->dpcm_merged_format = 1;
298
299 ret = graph_parse_node(priv, cpu_ep, li, &is_single_links);
300 if (ret)
301 return ret;
302
303 snprintf(dai_name, sizeof(dai_name),
304 "fe.%pOFP.%s", cpus->of_node, cpus->dai_name);
305 /*
306 * In BE<->BE connections it is not required to create
307 * PCM devices at CPU end of the dai link and thus 'no_pcm'
308 * flag needs to be set. It is useful when there are many
309 * BE components and some of these have to be connected to
310 * form a valid audio path.
311 *
312 * For example: FE <-> BE1 <-> BE2 <-> ... <-> BEn where
313 * there are 'n' BE components in the path.
314 */
315 if (card->component_chaining && !soc_component_is_pcm(cpus)) {
316 dai_link->no_pcm = 1;
317 dai_link->be_hw_params_fixup = asoc_simple_be_hw_params_fixup;
318 }
319
320 asoc_simple_canonicalize_cpu(cpus, is_single_links);
321 asoc_simple_canonicalize_platform(platforms, cpus);
322 } else {
323 struct snd_soc_codec_conf *cconf = simple_props_to_codec_conf(dai_props, 0);
324 struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, 0);
325 struct device_node *port;
326 struct device_node *ports;
327
328 /* CPU is dummy */
329
330 /* BE settings */
331 dai_link->no_pcm = 1;
332 dai_link->be_hw_params_fixup = asoc_simple_be_hw_params_fixup;
333
334 ret = graph_parse_node(priv, codec_ep, li, NULL);
335 if (ret < 0)
336 return ret;
337
338 snprintf(dai_name, sizeof(dai_name),
339 "be.%pOFP.%s", codecs->of_node, codecs->dai_name);
340
341 /* check "prefix" from top node */
342 port = of_get_parent(ep);
343 ports = of_get_parent(port);
344 snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node,
345 "prefix");
346 if (of_node_name_eq(ports, "ports"))
347 snd_soc_of_parse_node_prefix(ports, cconf, codecs->of_node, "prefix");
348 snd_soc_of_parse_node_prefix(port, cconf, codecs->of_node,
349 "prefix");
350
351 of_node_put(ports);
352 of_node_put(port);
353 }
354
355 graph_parse_convert(dev, ep, &dai_props->adata);
356
357 snd_soc_dai_link_set_capabilities(dai_link);
358
359 ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name);
360
361 li->link++;
362
363 return ret;
364}
365
366static int graph_dai_link_of(struct asoc_simple_priv *priv,
367 struct device_node *cpu_ep,
368 struct device_node *codec_ep,
369 struct link_info *li)
370{
371 struct device *dev = simple_priv_to_dev(priv);
372 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
373 struct snd_soc_dai_link_component *cpus = asoc_link_to_cpu(dai_link, 0);
374 struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, 0);
375 struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, 0);
376 char dai_name[64];
377 int ret, is_single_links = 0;
378
379 dev_dbg(dev, "link_of (%pOF)\n", cpu_ep);
380
381 ret = graph_parse_node(priv, cpu_ep, li, &is_single_links);
382 if (ret < 0)
383 return ret;
384
385 ret = graph_parse_node(priv, codec_ep, li, NULL);
386 if (ret < 0)
387 return ret;
388
389 snprintf(dai_name, sizeof(dai_name),
390 "%s-%s", cpus->dai_name, codecs->dai_name);
391
392 asoc_simple_canonicalize_cpu(cpus, is_single_links);
393 asoc_simple_canonicalize_platform(platforms, cpus);
394
395 ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name);
396 if (ret < 0)
397 return ret;
398
399 li->link++;
400
401 return 0;
402}
403
404static inline bool parse_as_dpcm_link(struct asoc_simple_priv *priv,
405 struct device_node *codec_port,
406 struct asoc_simple_data *adata)
407{
408 if (priv->force_dpcm)
409 return true;
410
411 if (!priv->dpcm_selectable)
412 return false;
413
414 /*
415 * It is DPCM
416 * if Codec port has many endpoints,
417 * or has convert-xxx property
418 */
419 if ((of_get_child_count(codec_port) > 1) ||
420 asoc_simple_is_convert_required(adata))
421 return true;
422
423 return false;
424}
425
426static int __graph_for_each_link(struct asoc_simple_priv *priv,
427 struct link_info *li,
428 int (*func_noml)(struct asoc_simple_priv *priv,
429 struct device_node *cpu_ep,
430 struct device_node *codec_ep,
431 struct link_info *li),
432 int (*func_dpcm)(struct asoc_simple_priv *priv,
433 struct device_node *cpu_ep,
434 struct device_node *codec_ep,
435 struct link_info *li))
436{
437 struct of_phandle_iterator it;
438 struct device *dev = simple_priv_to_dev(priv);
439 struct device_node *node = dev->of_node;
440 struct device_node *cpu_port;
441 struct device_node *cpu_ep;
442 struct device_node *codec_ep;
443 struct device_node *codec_port;
444 struct device_node *codec_port_old = NULL;
445 struct asoc_simple_data adata;
446 int rc, ret = 0;
447
448 /* loop for all listed CPU port */
449 of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
450 cpu_port = it.node;
451 cpu_ep = NULL;
452
453 /* loop for all CPU endpoint */
454 while (1) {
455 cpu_ep = of_get_next_child(cpu_port, cpu_ep);
456 if (!cpu_ep)
457 break;
458
459 /* get codec */
460 codec_ep = of_graph_get_remote_endpoint(cpu_ep);
461 codec_port = of_get_parent(codec_ep);
462
463 /* get convert-xxx property */
464 memset(&adata, 0, sizeof(adata));
465 graph_parse_convert(dev, codec_ep, &adata);
466 graph_parse_convert(dev, cpu_ep, &adata);
467
468 /* check if link requires DPCM parsing */
469 if (parse_as_dpcm_link(priv, codec_port, &adata)) {
470 /*
471 * Codec endpoint can be NULL for pluggable audio HW.
472 * Platform DT can populate the Codec endpoint depending on the
473 * plugged HW.
474 */
475 /* Do it all CPU endpoint, and 1st Codec endpoint */
476 if (li->cpu ||
477 ((codec_port_old != codec_port) && codec_ep))
478 ret = func_dpcm(priv, cpu_ep, codec_ep, li);
479 /* else normal sound */
480 } else {
481 if (li->cpu)
482 ret = func_noml(priv, cpu_ep, codec_ep, li);
483 }
484
485 of_node_put(codec_ep);
486 of_node_put(codec_port);
487
488 if (ret < 0) {
489 of_node_put(cpu_ep);
490 return ret;
491 }
492
493 codec_port_old = codec_port;
494 }
495 }
496
497 return 0;
498}
499
500static int graph_for_each_link(struct asoc_simple_priv *priv,
501 struct link_info *li,
502 int (*func_noml)(struct asoc_simple_priv *priv,
503 struct device_node *cpu_ep,
504 struct device_node *codec_ep,
505 struct link_info *li),
506 int (*func_dpcm)(struct asoc_simple_priv *priv,
507 struct device_node *cpu_ep,
508 struct device_node *codec_ep,
509 struct link_info *li))
510{
511 int ret;
512 /*
513 * Detect all CPU first, and Detect all Codec 2nd.
514 *
515 * In Normal sound case, all DAIs are detected
516 * as "CPU-Codec".
517 *
518 * In DPCM sound case,
519 * all CPUs are detected as "CPU-dummy", and
520 * all Codecs are detected as "dummy-Codec".
521 * To avoid random sub-device numbering,
522 * detect "dummy-Codec" in last;
523 */
524 for (li->cpu = 1; li->cpu >= 0; li->cpu--) {
525 ret = __graph_for_each_link(priv, li, func_noml, func_dpcm);
526 if (ret < 0)
527 break;
528 }
529
530 return ret;
531}
532
533static int graph_get_dais_count(struct asoc_simple_priv *priv,
534 struct link_info *li);
535
536int audio_graph_parse_of(struct asoc_simple_priv *priv, struct device *dev)
537{
538 struct snd_soc_card *card = simple_priv_to_card(priv);
539 struct link_info *li;
540 int ret;
541
542 li = devm_kzalloc(dev, sizeof(*li), GFP_KERNEL);
543 if (!li)
544 return -ENOMEM;
545
546 card->owner = THIS_MODULE;
547 card->dev = dev;
548
549 ret = graph_get_dais_count(priv, li);
550 if (ret < 0)
551 return ret;
552
553 if (!li->link)
554 return -EINVAL;
555
556 ret = asoc_simple_init_priv(priv, li);
557 if (ret < 0)
558 return ret;
559
560 priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW);
561 if (IS_ERR(priv->pa_gpio)) {
562 ret = PTR_ERR(priv->pa_gpio);
563 dev_err(dev, "failed to get amplifier gpio: %d\n", ret);
564 return ret;
565 }
566
567 ret = asoc_simple_parse_widgets(card, NULL);
568 if (ret < 0)
569 return ret;
570
571 ret = asoc_simple_parse_routing(card, NULL);
572 if (ret < 0)
573 return ret;
574
575 memset(li, 0, sizeof(*li));
576 ret = graph_for_each_link(priv, li,
577 graph_dai_link_of,
578 graph_dai_link_of_dpcm);
579 if (ret < 0)
580 goto err;
581
582 ret = asoc_simple_parse_card_name(card, NULL);
583 if (ret < 0)
584 goto err;
585
586 snd_soc_card_set_drvdata(card, priv);
587
588 asoc_simple_debug_info(priv);
589
590 ret = devm_snd_soc_register_card(dev, card);
591 if (ret < 0)
592 goto err;
593
594 devm_kfree(dev, li);
595 return 0;
596
597err:
598 asoc_simple_clean_reference(card);
599
600 return dev_err_probe(dev, ret, "parse error\n");
601}
602EXPORT_SYMBOL_GPL(audio_graph_parse_of);
603
604static int graph_count_noml(struct asoc_simple_priv *priv,
605 struct device_node *cpu_ep,
606 struct device_node *codec_ep,
607 struct link_info *li)
608{
609 struct device *dev = simple_priv_to_dev(priv);
610
611 if (li->link >= SNDRV_MAX_LINKS) {
612 dev_err(dev, "too many links\n");
613 return -EINVAL;
614 }
615
616 li->num[li->link].cpus = 1;
617 li->num[li->link].codecs = 1;
618 li->num[li->link].platforms = 1;
619
620 li->link += 1; /* 1xCPU-Codec */
621
622 dev_dbg(dev, "Count As Normal\n");
623
624 return 0;
625}
626
627static int graph_count_dpcm(struct asoc_simple_priv *priv,
628 struct device_node *cpu_ep,
629 struct device_node *codec_ep,
630 struct link_info *li)
631{
632 struct device *dev = simple_priv_to_dev(priv);
633
634 if (li->link >= SNDRV_MAX_LINKS) {
635 dev_err(dev, "too many links\n");
636 return -EINVAL;
637 }
638
639 if (li->cpu) {
640 li->num[li->link].cpus = 1;
641 li->num[li->link].platforms = 1;
642
643 li->link++; /* 1xCPU-dummy */
644 } else {
645 li->num[li->link].codecs = 1;
646
647 li->link++; /* 1xdummy-Codec */
648 }
649
650 dev_dbg(dev, "Count As DPCM\n");
651
652 return 0;
653}
654
655static int graph_get_dais_count(struct asoc_simple_priv *priv,
656 struct link_info *li)
657{
658 /*
659 * link_num : number of links.
660 * CPU-Codec / CPU-dummy / dummy-Codec
661 * dais_num : number of DAIs
662 * ccnf_num : number of codec_conf
663 * same number for "dummy-Codec"
664 *
665 * ex1)
666 * CPU0 --- Codec0 link : 5
667 * CPU1 --- Codec1 dais : 7
668 * CPU2 -/ ccnf : 1
669 * CPU3 --- Codec2
670 *
671 * => 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec
672 * => 7 DAIs = 4xCPU + 3xCodec
673 * => 1 ccnf = 1xdummy-Codec
674 *
675 * ex2)
676 * CPU0 --- Codec0 link : 5
677 * CPU1 --- Codec1 dais : 6
678 * CPU2 -/ ccnf : 1
679 * CPU3 -/
680 *
681 * => 5 links = 1xCPU-Codec + 3xCPU-dummy + 1xdummy-Codec
682 * => 6 DAIs = 4xCPU + 2xCodec
683 * => 1 ccnf = 1xdummy-Codec
684 *
685 * ex3)
686 * CPU0 --- Codec0 link : 6
687 * CPU1 -/ dais : 6
688 * CPU2 --- Codec1 ccnf : 2
689 * CPU3 -/
690 *
691 * => 6 links = 0xCPU-Codec + 4xCPU-dummy + 2xdummy-Codec
692 * => 6 DAIs = 4xCPU + 2xCodec
693 * => 2 ccnf = 2xdummy-Codec
694 *
695 * ex4)
696 * CPU0 --- Codec0 (convert-rate) link : 3
697 * CPU1 --- Codec1 dais : 4
698 * ccnf : 1
699 *
700 * => 3 links = 1xCPU-Codec + 1xCPU-dummy + 1xdummy-Codec
701 * => 4 DAIs = 2xCPU + 2xCodec
702 * => 1 ccnf = 1xdummy-Codec
703 */
704 return graph_for_each_link(priv, li,
705 graph_count_noml,
706 graph_count_dpcm);
707}
708
709static int graph_probe(struct platform_device *pdev)
710{
711 struct asoc_simple_priv *priv;
712 struct device *dev = &pdev->dev;
713 struct snd_soc_card *card;
714
715 /* Allocate the private data and the DAI link array */
716 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
717 if (!priv)
718 return -ENOMEM;
719
720 card = simple_priv_to_card(priv);
721 card->dapm_widgets = graph_dapm_widgets;
722 card->num_dapm_widgets = ARRAY_SIZE(graph_dapm_widgets);
723 card->probe = asoc_graph_card_probe;
724
725 if (of_device_get_match_data(dev))
726 priv->dpcm_selectable = 1;
727
728 return audio_graph_parse_of(priv, dev);
729}
730
731static const struct of_device_id graph_of_match[] = {
732 { .compatible = "audio-graph-card", },
733 { .compatible = "audio-graph-scu-card",
734 .data = (void *)DPCM_SELECTABLE },
735 {},
736};
737MODULE_DEVICE_TABLE(of, graph_of_match);
738
739static struct platform_driver graph_card = {
740 .driver = {
741 .name = "asoc-audio-graph-card",
742 .pm = &snd_soc_pm_ops,
743 .of_match_table = graph_of_match,
744 },
745 .probe = graph_probe,
746 .remove = asoc_simple_remove,
747};
748module_platform_driver(graph_card);
749
750MODULE_ALIAS("platform:asoc-audio-graph-card");
751MODULE_LICENSE("GPL v2");
752MODULE_DESCRIPTION("ASoC Audio Graph Sound Card");
753MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");