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/simple_card_utils.h>
22
23 #define DPCM_SELECTABLE 1
24
25 #define PREFIX "audio-graph-card,"
26
graph_outdrv_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)27 static int graph_outdrv_event(struct snd_soc_dapm_widget *w,
28 struct snd_kcontrol *kcontrol,
29 int event)
30 {
31 struct snd_soc_dapm_context *dapm = w->dapm;
32 struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(dapm->card);
33
34 switch (event) {
35 case SND_SOC_DAPM_POST_PMU:
36 gpiod_set_value_cansleep(priv->pa_gpio, 1);
37 break;
38 case SND_SOC_DAPM_PRE_PMD:
39 gpiod_set_value_cansleep(priv->pa_gpio, 0);
40 break;
41 default:
42 return -EINVAL;
43 }
44
45 return 0;
46 }
47
48 static const struct snd_soc_dapm_widget graph_dapm_widgets[] = {
49 SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM,
50 0, 0, NULL, 0, graph_outdrv_event,
51 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
52 };
53
54 static const struct snd_soc_ops graph_ops = {
55 .startup = asoc_simple_startup,
56 .shutdown = asoc_simple_shutdown,
57 .hw_params = asoc_simple_hw_params,
58 };
59
graph_get_dai_id(struct device_node * ep)60 static int graph_get_dai_id(struct device_node *ep)
61 {
62 struct device_node *node;
63 struct device_node *endpoint;
64 struct of_endpoint info;
65 int i, id;
66 const u32 *reg;
67 int ret;
68
69 /* use driver specified DAI ID if exist */
70 ret = snd_soc_get_dai_id(ep);
71 if (ret != -ENOTSUPP)
72 return ret;
73
74 /* use endpoint/port reg if exist */
75 ret = of_graph_parse_endpoint(ep, &info);
76 if (ret == 0) {
77 /*
78 * Because it will count port/endpoint if it doesn't have "reg".
79 * But, we can't judge whether it has "no reg", or "reg = <0>"
80 * only of_graph_parse_endpoint().
81 * We need to check "reg" property
82 */
83 if (of_get_property(ep, "reg", NULL))
84 return info.id;
85
86 node = of_get_parent(ep);
87 reg = of_get_property(node, "reg", NULL);
88 of_node_put(node);
89 if (reg)
90 return info.port;
91 }
92 node = of_graph_get_port_parent(ep);
93
94 /*
95 * Non HDMI sound case, counting port/endpoint on its DT
96 * is enough. Let's count it.
97 */
98 i = 0;
99 id = -1;
100 for_each_endpoint_of_node(node, endpoint) {
101 if (endpoint == ep)
102 id = i;
103 i++;
104 }
105
106 of_node_put(node);
107
108 if (id < 0)
109 return -ENODEV;
110
111 return id;
112 }
113
asoc_simple_parse_dai(struct device_node * ep,struct snd_soc_dai_link_component * dlc,int * is_single_link)114 static int asoc_simple_parse_dai(struct device_node *ep,
115 struct snd_soc_dai_link_component *dlc,
116 int *is_single_link)
117 {
118 struct device_node *node;
119 struct of_phandle_args args;
120 int ret;
121
122 if (!ep)
123 return 0;
124
125 node = of_graph_get_port_parent(ep);
126
127 /* Get dai->name */
128 args.np = node;
129 args.args[0] = graph_get_dai_id(ep);
130 args.args_count = (of_graph_get_endpoint_count(node) > 1);
131
132 /*
133 * FIXME
134 *
135 * Here, dlc->dai_name is pointer to CPU/Codec DAI name.
136 * If user unbinded CPU or Codec driver, but not for Sound Card,
137 * dlc->dai_name is keeping unbinded CPU or Codec
138 * driver's pointer.
139 *
140 * If user re-bind CPU or Codec driver again, ALSA SoC will try
141 * to rebind Card via snd_soc_try_rebind_card(), but because of
142 * above reason, it might can't bind Sound Card.
143 * Because Sound Card is pointing to released dai_name pointer.
144 *
145 * To avoid this rebind Card issue,
146 * 1) It needs to alloc memory to keep dai_name eventhough
147 * CPU or Codec driver was unbinded, or
148 * 2) user need to rebind Sound Card everytime
149 * if he unbinded CPU or Codec.
150 */
151 ret = snd_soc_get_dai_name(&args, &dlc->dai_name);
152 if (ret < 0)
153 return ret;
154
155 dlc->of_node = node;
156
157 if (is_single_link)
158 *is_single_link = of_graph_get_endpoint_count(node) == 1;
159
160 return 0;
161 }
162
graph_parse_convert(struct device * dev,struct device_node * ep,struct asoc_simple_data * adata)163 static void graph_parse_convert(struct device *dev,
164 struct device_node *ep,
165 struct asoc_simple_data *adata)
166 {
167 struct device_node *top = dev->of_node;
168 struct device_node *port = of_get_parent(ep);
169 struct device_node *ports = of_get_parent(port);
170 struct device_node *node = of_graph_get_port_parent(ep);
171
172 asoc_simple_parse_convert(dev, top, NULL, adata);
173 asoc_simple_parse_convert(dev, node, PREFIX, adata);
174 asoc_simple_parse_convert(dev, ports, NULL, adata);
175 asoc_simple_parse_convert(dev, port, NULL, adata);
176 asoc_simple_parse_convert(dev, ep, NULL, adata);
177
178 of_node_put(port);
179 of_node_put(ports);
180 of_node_put(node);
181 }
182
graph_parse_mclk_fs(struct device_node * top,struct device_node * ep,struct simple_dai_props * props)183 static void graph_parse_mclk_fs(struct device_node *top,
184 struct device_node *ep,
185 struct simple_dai_props *props)
186 {
187 struct device_node *port = of_get_parent(ep);
188 struct device_node *ports = of_get_parent(port);
189 struct device_node *node = of_graph_get_port_parent(ep);
190
191 of_property_read_u32(top, "mclk-fs", &props->mclk_fs);
192 of_property_read_u32(ports, "mclk-fs", &props->mclk_fs);
193 of_property_read_u32(port, "mclk-fs", &props->mclk_fs);
194 of_property_read_u32(ep, "mclk-fs", &props->mclk_fs);
195
196 of_node_put(port);
197 of_node_put(ports);
198 of_node_put(node);
199 }
200
graph_dai_link_of_dpcm(struct asoc_simple_priv * priv,struct device_node * cpu_ep,struct device_node * codec_ep,struct link_info * li,int dup_codec)201 static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv,
202 struct device_node *cpu_ep,
203 struct device_node *codec_ep,
204 struct link_info *li,
205 int dup_codec)
206 {
207 struct device *dev = simple_priv_to_dev(priv);
208 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
209 struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
210 struct device_node *top = dev->of_node;
211 struct device_node *ep = li->cpu ? cpu_ep : codec_ep;
212 struct device_node *port;
213 struct device_node *ports;
214 struct device_node *node;
215 struct asoc_simple_dai *dai;
216 struct snd_soc_dai_link_component *cpus = dai_link->cpus;
217 struct snd_soc_dai_link_component *codecs = dai_link->codecs;
218 int ret;
219
220 /* Do it all CPU endpoint, and 1st Codec endpoint */
221 if (!li->cpu && dup_codec)
222 return 0;
223
224 port = of_get_parent(ep);
225 ports = of_get_parent(port);
226 node = of_graph_get_port_parent(ep);
227
228 li->link++;
229
230 dev_dbg(dev, "link_of DPCM (%pOF)\n", ep);
231
232 if (li->cpu) {
233 int is_single_links = 0;
234
235 /* BE is dummy */
236 codecs->of_node = NULL;
237 codecs->dai_name = "snd-soc-dummy-dai";
238 codecs->name = "snd-soc-dummy";
239
240 /* FE settings */
241 dai_link->dynamic = 1;
242 dai_link->dpcm_merged_format = 1;
243
244 dai =
245 dai_props->cpu_dai = &priv->dais[li->dais++];
246
247 ret = asoc_simple_parse_cpu(ep, dai_link, &is_single_links);
248 if (ret)
249 goto out_put_node;
250
251 ret = asoc_simple_parse_clk_cpu(dev, ep, dai_link, dai);
252 if (ret < 0)
253 goto out_put_node;
254
255 ret = asoc_simple_set_dailink_name(dev, dai_link,
256 "fe.%s",
257 cpus->dai_name);
258 if (ret < 0)
259 goto out_put_node;
260
261 /* card->num_links includes Codec */
262 asoc_simple_canonicalize_cpu(dai_link, is_single_links);
263 } else {
264 struct snd_soc_codec_conf *cconf;
265
266 /* FE is dummy */
267 cpus->of_node = NULL;
268 cpus->dai_name = "snd-soc-dummy-dai";
269 cpus->name = "snd-soc-dummy";
270
271 /* BE settings */
272 dai_link->no_pcm = 1;
273 dai_link->be_hw_params_fixup = asoc_simple_be_hw_params_fixup;
274
275 dai =
276 dai_props->codec_dai = &priv->dais[li->dais++];
277
278 cconf =
279 dai_props->codec_conf = &priv->codec_conf[li->conf++];
280
281 ret = asoc_simple_parse_codec(ep, dai_link);
282 if (ret < 0)
283 goto out_put_node;
284
285 ret = asoc_simple_parse_clk_codec(dev, ep, dai_link, dai);
286 if (ret < 0)
287 goto out_put_node;
288
289 ret = asoc_simple_set_dailink_name(dev, dai_link,
290 "be.%s",
291 codecs->dai_name);
292 if (ret < 0)
293 goto out_put_node;
294
295 /* check "prefix" from top node */
296 snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node,
297 "prefix");
298 snd_soc_of_parse_node_prefix(node, cconf, codecs->of_node,
299 PREFIX "prefix");
300 snd_soc_of_parse_node_prefix(ports, cconf, codecs->of_node,
301 "prefix");
302 snd_soc_of_parse_node_prefix(port, cconf, codecs->of_node,
303 "prefix");
304 }
305
306 graph_parse_convert(dev, ep, &dai_props->adata);
307 graph_parse_mclk_fs(top, ep, dai_props);
308
309 asoc_simple_canonicalize_platform(dai_link);
310
311 ret = asoc_simple_parse_tdm(ep, dai);
312 if (ret)
313 goto out_put_node;
314
315 ret = asoc_simple_parse_daifmt(dev, cpu_ep, codec_ep,
316 NULL, &dai_link->dai_fmt);
317 if (ret < 0)
318 goto out_put_node;
319
320 dai_link->dpcm_playback = 1;
321 dai_link->dpcm_capture = 1;
322 dai_link->ops = &graph_ops;
323 dai_link->init = asoc_simple_dai_init;
324
325 out_put_node:
326 of_node_put(ports);
327 of_node_put(port);
328 of_node_put(node);
329 return ret;
330 }
331
graph_dai_link_of(struct asoc_simple_priv * priv,struct device_node * cpu_ep,struct device_node * codec_ep,struct link_info * li)332 static int graph_dai_link_of(struct asoc_simple_priv *priv,
333 struct device_node *cpu_ep,
334 struct device_node *codec_ep,
335 struct link_info *li)
336 {
337 struct device *dev = simple_priv_to_dev(priv);
338 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
339 struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
340 struct device_node *top = dev->of_node;
341 struct asoc_simple_dai *cpu_dai;
342 struct asoc_simple_dai *codec_dai;
343 int ret, single_cpu;
344
345 /* Do it only CPU turn */
346 if (!li->cpu)
347 return 0;
348
349 dev_dbg(dev, "link_of (%pOF)\n", cpu_ep);
350
351 li->link++;
352
353 cpu_dai =
354 dai_props->cpu_dai = &priv->dais[li->dais++];
355 codec_dai =
356 dai_props->codec_dai = &priv->dais[li->dais++];
357
358 /* Factor to mclk, used in hw_params() */
359 graph_parse_mclk_fs(top, cpu_ep, dai_props);
360 graph_parse_mclk_fs(top, codec_ep, dai_props);
361
362 ret = asoc_simple_parse_daifmt(dev, cpu_ep, codec_ep,
363 NULL, &dai_link->dai_fmt);
364 if (ret < 0)
365 return ret;
366
367 ret = asoc_simple_parse_cpu(cpu_ep, dai_link, &single_cpu);
368 if (ret < 0)
369 return ret;
370
371 ret = asoc_simple_parse_codec(codec_ep, dai_link);
372 if (ret < 0)
373 return ret;
374
375 ret = asoc_simple_parse_tdm(cpu_ep, cpu_dai);
376 if (ret < 0)
377 return ret;
378
379 ret = asoc_simple_parse_tdm(codec_ep, codec_dai);
380 if (ret < 0)
381 return ret;
382
383 ret = asoc_simple_parse_clk_cpu(dev, cpu_ep, dai_link, cpu_dai);
384 if (ret < 0)
385 return ret;
386
387 ret = asoc_simple_parse_clk_codec(dev, codec_ep, dai_link, codec_dai);
388 if (ret < 0)
389 return ret;
390
391 ret = asoc_simple_set_dailink_name(dev, dai_link,
392 "%s-%s",
393 dai_link->cpus->dai_name,
394 dai_link->codecs->dai_name);
395 if (ret < 0)
396 return ret;
397
398 dai_link->ops = &graph_ops;
399 dai_link->init = asoc_simple_dai_init;
400
401 asoc_simple_canonicalize_cpu(dai_link, single_cpu);
402 asoc_simple_canonicalize_platform(dai_link);
403
404 return 0;
405 }
406
graph_for_each_link(struct asoc_simple_priv * priv,struct link_info * li,int (* func_noml)(struct asoc_simple_priv * priv,struct device_node * cpu_ep,struct device_node * codec_ep,struct link_info * li),int (* func_dpcm)(struct asoc_simple_priv * priv,struct device_node * cpu_ep,struct device_node * codec_ep,struct link_info * li,int dup_codec))407 static int graph_for_each_link(struct asoc_simple_priv *priv,
408 struct link_info *li,
409 int (*func_noml)(struct asoc_simple_priv *priv,
410 struct device_node *cpu_ep,
411 struct device_node *codec_ep,
412 struct link_info *li),
413 int (*func_dpcm)(struct asoc_simple_priv *priv,
414 struct device_node *cpu_ep,
415 struct device_node *codec_ep,
416 struct link_info *li, int dup_codec))
417 {
418 struct of_phandle_iterator it;
419 struct device *dev = simple_priv_to_dev(priv);
420 struct device_node *node = dev->of_node;
421 struct device_node *cpu_port;
422 struct device_node *cpu_ep;
423 struct device_node *codec_ep;
424 struct device_node *codec_port;
425 struct device_node *codec_port_old = NULL;
426 struct asoc_simple_data adata;
427 uintptr_t dpcm_selectable = (uintptr_t)of_device_get_match_data(dev);
428 int rc, ret;
429
430 /* loop for all listed CPU port */
431 of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
432 cpu_port = it.node;
433 cpu_ep = NULL;
434
435 /* loop for all CPU endpoint */
436 while (1) {
437 cpu_ep = of_get_next_child(cpu_port, cpu_ep);
438 if (!cpu_ep)
439 break;
440
441 /* get codec */
442 codec_ep = of_graph_get_remote_endpoint(cpu_ep);
443 codec_port = of_get_parent(codec_ep);
444
445 /* get convert-xxx property */
446 memset(&adata, 0, sizeof(adata));
447 graph_parse_convert(dev, codec_ep, &adata);
448 graph_parse_convert(dev, cpu_ep, &adata);
449
450 /*
451 * It is DPCM
452 * if Codec port has many endpoints,
453 * or has convert-xxx property
454 */
455 if (dpcm_selectable &&
456 ((of_get_child_count(codec_port) > 1) ||
457 adata.convert_rate || adata.convert_channels))
458 ret = func_dpcm(priv, cpu_ep, codec_ep, li,
459 (codec_port_old == codec_port));
460 /* else normal sound */
461 else
462 ret = func_noml(priv, cpu_ep, codec_ep, li);
463
464 of_node_put(codec_ep);
465 of_node_put(codec_port);
466
467 if (ret < 0)
468 return ret;
469
470 codec_port_old = codec_port;
471 }
472 }
473
474 return 0;
475 }
476
graph_parse_of(struct asoc_simple_priv * priv)477 static int graph_parse_of(struct asoc_simple_priv *priv)
478 {
479 struct snd_soc_card *card = simple_priv_to_card(priv);
480 struct link_info li;
481 int ret;
482
483 ret = asoc_simple_parse_widgets(card, NULL);
484 if (ret < 0)
485 return ret;
486
487 ret = asoc_simple_parse_routing(card, NULL);
488 if (ret < 0)
489 return ret;
490
491 memset(&li, 0, sizeof(li));
492 for (li.cpu = 1; li.cpu >= 0; li.cpu--) {
493 /*
494 * Detect all CPU first, and Detect all Codec 2nd.
495 *
496 * In Normal sound case, all DAIs are detected
497 * as "CPU-Codec".
498 *
499 * In DPCM sound case,
500 * all CPUs are detected as "CPU-dummy", and
501 * all Codecs are detected as "dummy-Codec".
502 * To avoid random sub-device numbering,
503 * detect "dummy-Codec" in last;
504 */
505 ret = graph_for_each_link(priv, &li,
506 graph_dai_link_of,
507 graph_dai_link_of_dpcm);
508 if (ret < 0)
509 return ret;
510 }
511
512 return asoc_simple_parse_card_name(card, NULL);
513 }
514
graph_count_noml(struct asoc_simple_priv * priv,struct device_node * cpu_ep,struct device_node * codec_ep,struct link_info * li)515 static int graph_count_noml(struct asoc_simple_priv *priv,
516 struct device_node *cpu_ep,
517 struct device_node *codec_ep,
518 struct link_info *li)
519 {
520 struct device *dev = simple_priv_to_dev(priv);
521
522 li->link += 1; /* 1xCPU-Codec */
523 li->dais += 2; /* 1xCPU + 1xCodec */
524
525 dev_dbg(dev, "Count As Normal\n");
526
527 return 0;
528 }
529
graph_count_dpcm(struct asoc_simple_priv * priv,struct device_node * cpu_ep,struct device_node * codec_ep,struct link_info * li,int dup_codec)530 static int graph_count_dpcm(struct asoc_simple_priv *priv,
531 struct device_node *cpu_ep,
532 struct device_node *codec_ep,
533 struct link_info *li,
534 int dup_codec)
535 {
536 struct device *dev = simple_priv_to_dev(priv);
537
538 li->link++; /* 1xCPU-dummy */
539 li->dais++; /* 1xCPU */
540
541 if (!dup_codec) {
542 li->link++; /* 1xdummy-Codec */
543 li->conf++; /* 1xdummy-Codec */
544 li->dais++; /* 1xCodec */
545 }
546
547 dev_dbg(dev, "Count As DPCM\n");
548
549 return 0;
550 }
551
graph_get_dais_count(struct asoc_simple_priv * priv,struct link_info * li)552 static void graph_get_dais_count(struct asoc_simple_priv *priv,
553 struct link_info *li)
554 {
555 struct device *dev = simple_priv_to_dev(priv);
556
557 /*
558 * link_num : number of links.
559 * CPU-Codec / CPU-dummy / dummy-Codec
560 * dais_num : number of DAIs
561 * ccnf_num : number of codec_conf
562 * same number for "dummy-Codec"
563 *
564 * ex1)
565 * CPU0 --- Codec0 link : 5
566 * CPU1 --- Codec1 dais : 7
567 * CPU2 -/ ccnf : 1
568 * CPU3 --- Codec2
569 *
570 * => 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec
571 * => 7 DAIs = 4xCPU + 3xCodec
572 * => 1 ccnf = 1xdummy-Codec
573 *
574 * ex2)
575 * CPU0 --- Codec0 link : 5
576 * CPU1 --- Codec1 dais : 6
577 * CPU2 -/ ccnf : 1
578 * CPU3 -/
579 *
580 * => 5 links = 1xCPU-Codec + 3xCPU-dummy + 1xdummy-Codec
581 * => 6 DAIs = 4xCPU + 2xCodec
582 * => 1 ccnf = 1xdummy-Codec
583 *
584 * ex3)
585 * CPU0 --- Codec0 link : 6
586 * CPU1 -/ dais : 6
587 * CPU2 --- Codec1 ccnf : 2
588 * CPU3 -/
589 *
590 * => 6 links = 0xCPU-Codec + 4xCPU-dummy + 2xdummy-Codec
591 * => 6 DAIs = 4xCPU + 2xCodec
592 * => 2 ccnf = 2xdummy-Codec
593 *
594 * ex4)
595 * CPU0 --- Codec0 (convert-rate) link : 3
596 * CPU1 --- Codec1 dais : 4
597 * ccnf : 1
598 *
599 * => 3 links = 1xCPU-Codec + 1xCPU-dummy + 1xdummy-Codec
600 * => 4 DAIs = 2xCPU + 2xCodec
601 * => 1 ccnf = 1xdummy-Codec
602 */
603 graph_for_each_link(priv, li,
604 graph_count_noml,
605 graph_count_dpcm);
606 dev_dbg(dev, "link %d, dais %d, ccnf %d\n",
607 li->link, li->dais, li->conf);
608 }
609
graph_card_probe(struct snd_soc_card * card)610 static int graph_card_probe(struct snd_soc_card *card)
611 {
612 struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(card);
613 int ret;
614
615 ret = asoc_simple_init_hp(card, &priv->hp_jack, NULL);
616 if (ret < 0)
617 return ret;
618
619 ret = asoc_simple_init_mic(card, &priv->mic_jack, NULL);
620 if (ret < 0)
621 return ret;
622
623 return 0;
624 }
625
graph_probe(struct platform_device * pdev)626 static int graph_probe(struct platform_device *pdev)
627 {
628 struct asoc_simple_priv *priv;
629 struct device *dev = &pdev->dev;
630 struct snd_soc_card *card;
631 struct link_info li;
632 int ret;
633
634 /* Allocate the private data and the DAI link array */
635 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
636 if (!priv)
637 return -ENOMEM;
638
639 card = simple_priv_to_card(priv);
640 card->owner = THIS_MODULE;
641 card->dev = dev;
642 card->dapm_widgets = graph_dapm_widgets;
643 card->num_dapm_widgets = ARRAY_SIZE(graph_dapm_widgets);
644 card->probe = graph_card_probe;
645
646 memset(&li, 0, sizeof(li));
647 graph_get_dais_count(priv, &li);
648 if (!li.link || !li.dais)
649 return -EINVAL;
650
651 ret = asoc_simple_init_priv(priv, &li);
652 if (ret < 0)
653 return ret;
654
655 priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW);
656 if (IS_ERR(priv->pa_gpio)) {
657 ret = PTR_ERR(priv->pa_gpio);
658 dev_err(dev, "failed to get amplifier gpio: %d\n", ret);
659 return ret;
660 }
661
662 ret = graph_parse_of(priv);
663 if (ret < 0) {
664 if (ret != -EPROBE_DEFER)
665 dev_err(dev, "parse error %d\n", ret);
666 goto err;
667 }
668
669 snd_soc_card_set_drvdata(card, priv);
670
671 asoc_simple_debug_info(priv);
672
673 ret = devm_snd_soc_register_card(dev, card);
674 if (ret < 0)
675 goto err;
676
677 return 0;
678 err:
679 asoc_simple_clean_reference(card);
680
681 return ret;
682 }
683
graph_remove(struct platform_device * pdev)684 static int graph_remove(struct platform_device *pdev)
685 {
686 struct snd_soc_card *card = platform_get_drvdata(pdev);
687
688 return asoc_simple_clean_reference(card);
689 }
690
691 static const struct of_device_id graph_of_match[] = {
692 { .compatible = "audio-graph-card", },
693 { .compatible = "audio-graph-scu-card",
694 .data = (void *)DPCM_SELECTABLE },
695 {},
696 };
697 MODULE_DEVICE_TABLE(of, graph_of_match);
698
699 static struct platform_driver graph_card = {
700 .driver = {
701 .name = "asoc-audio-graph-card",
702 .pm = &snd_soc_pm_ops,
703 .of_match_table = graph_of_match,
704 },
705 .probe = graph_probe,
706 .remove = graph_remove,
707 };
708 module_platform_driver(graph_card);
709
710 MODULE_ALIAS("platform:asoc-audio-graph-card");
711 MODULE_LICENSE("GPL v2");
712 MODULE_DESCRIPTION("ASoC Audio Graph Sound Card");
713 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
714
