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