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