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 struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, 0); 289 int is_single_links = 0; 290 291 /* Codec is dummy */ 292 293 /* FE settings */ 294 dai_link->dynamic = 1; 295 dai_link->dpcm_merged_format = 1; 296 297 ret = graph_parse_node(priv, cpu_ep, li, &is_single_links); 298 if (ret) 299 return ret; 300 301 snprintf(dai_name, sizeof(dai_name), 302 "fe.%pOFP.%s", cpus->of_node, cpus->dai_name); 303 /* 304 * In BE<->BE connections it is not required to create 305 * PCM devices at CPU end of the dai link and thus 'no_pcm' 306 * flag needs to be set. It is useful when there are many 307 * BE components and some of these have to be connected to 308 * form a valid audio path. 309 * 310 * For example: FE <-> BE1 <-> BE2 <-> ... <-> BEn where 311 * there are 'n' BE components in the path. 312 */ 313 if (card->component_chaining && !soc_component_is_pcm(cpus)) { 314 dai_link->no_pcm = 1; 315 dai_link->be_hw_params_fixup = asoc_simple_be_hw_params_fixup; 316 } 317 318 asoc_simple_canonicalize_cpu(cpus, is_single_links); 319 asoc_simple_canonicalize_platform(platforms, cpus); 320 } else { 321 struct snd_soc_codec_conf *cconf = simple_props_to_codec_conf(dai_props, 0); 322 struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, 0); 323 struct device_node *port; 324 struct device_node *ports; 325 326 /* CPU is dummy */ 327 328 /* BE settings */ 329 dai_link->no_pcm = 1; 330 dai_link->be_hw_params_fixup = asoc_simple_be_hw_params_fixup; 331 332 ret = graph_parse_node(priv, codec_ep, li, NULL); 333 if (ret < 0) 334 return ret; 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 port = of_get_parent(ep); 341 ports = of_get_parent(port); 342 snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node, 343 "prefix"); 344 if (of_node_name_eq(ports, "ports")) 345 snd_soc_of_parse_node_prefix(ports, cconf, codecs->of_node, "prefix"); 346 snd_soc_of_parse_node_prefix(port, cconf, codecs->of_node, 347 "prefix"); 348 349 of_node_put(ports); 350 of_node_put(port); 351 } 352 353 graph_parse_convert(dev, ep, &dai_props->adata); 354 355 snd_soc_dai_link_set_capabilities(dai_link); 356 357 ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name); 358 359 li->link++; 360 361 return ret; 362 } 363 364 static int graph_dai_link_of(struct asoc_simple_priv *priv, 365 struct device_node *cpu_ep, 366 struct device_node *codec_ep, 367 struct link_info *li) 368 { 369 struct device *dev = simple_priv_to_dev(priv); 370 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); 371 struct snd_soc_dai_link_component *cpus = asoc_link_to_cpu(dai_link, 0); 372 struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, 0); 373 struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, 0); 374 char dai_name[64]; 375 int ret, is_single_links = 0; 376 377 dev_dbg(dev, "link_of (%pOF)\n", cpu_ep); 378 379 ret = graph_parse_node(priv, cpu_ep, li, &is_single_links); 380 if (ret < 0) 381 return ret; 382 383 ret = graph_parse_node(priv, codec_ep, li, NULL); 384 if (ret < 0) 385 return ret; 386 387 snprintf(dai_name, sizeof(dai_name), 388 "%s-%s", cpus->dai_name, codecs->dai_name); 389 390 asoc_simple_canonicalize_cpu(cpus, is_single_links); 391 asoc_simple_canonicalize_platform(platforms, cpus); 392 393 ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name); 394 if (ret < 0) 395 return ret; 396 397 li->link++; 398 399 return 0; 400 } 401 402 static inline bool parse_as_dpcm_link(struct asoc_simple_priv *priv, 403 struct device_node *codec_port, 404 struct asoc_simple_data *adata) 405 { 406 if (priv->force_dpcm) 407 return true; 408 409 if (!priv->dpcm_selectable) 410 return false; 411 412 /* 413 * It is DPCM 414 * if Codec port has many endpoints, 415 * or has convert-xxx property 416 */ 417 if ((of_get_child_count(codec_port) > 1) || 418 (adata->convert_rate || adata->convert_channels)) 419 return true; 420 421 return false; 422 } 423 424 static int __graph_for_each_link(struct asoc_simple_priv *priv, 425 struct link_info *li, 426 int (*func_noml)(struct asoc_simple_priv *priv, 427 struct device_node *cpu_ep, 428 struct device_node *codec_ep, 429 struct link_info *li), 430 int (*func_dpcm)(struct asoc_simple_priv *priv, 431 struct device_node *cpu_ep, 432 struct device_node *codec_ep, 433 struct link_info *li)) 434 { 435 struct of_phandle_iterator it; 436 struct device *dev = simple_priv_to_dev(priv); 437 struct device_node *node = dev->of_node; 438 struct device_node *cpu_port; 439 struct device_node *cpu_ep; 440 struct device_node *codec_ep; 441 struct device_node *codec_port; 442 struct device_node *codec_port_old = NULL; 443 struct asoc_simple_data adata; 444 int rc, ret = 0; 445 446 /* loop for all listed CPU port */ 447 of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { 448 cpu_port = it.node; 449 cpu_ep = NULL; 450 451 /* loop for all CPU endpoint */ 452 while (1) { 453 cpu_ep = of_get_next_child(cpu_port, cpu_ep); 454 if (!cpu_ep) 455 break; 456 457 /* get codec */ 458 codec_ep = of_graph_get_remote_endpoint(cpu_ep); 459 codec_port = of_get_parent(codec_ep); 460 461 /* get convert-xxx property */ 462 memset(&adata, 0, sizeof(adata)); 463 graph_parse_convert(dev, codec_ep, &adata); 464 graph_parse_convert(dev, cpu_ep, &adata); 465 466 /* check if link requires DPCM parsing */ 467 if (parse_as_dpcm_link(priv, codec_port, &adata)) { 468 /* 469 * Codec endpoint can be NULL for pluggable audio HW. 470 * Platform DT can populate the Codec endpoint depending on the 471 * plugged HW. 472 */ 473 /* Do it all CPU endpoint, and 1st Codec endpoint */ 474 if (li->cpu || 475 ((codec_port_old != codec_port) && codec_ep)) 476 ret = func_dpcm(priv, cpu_ep, codec_ep, li); 477 /* else normal sound */ 478 } else { 479 if (li->cpu) 480 ret = func_noml(priv, cpu_ep, codec_ep, li); 481 } 482 483 of_node_put(codec_ep); 484 of_node_put(codec_port); 485 486 if (ret < 0) 487 return ret; 488 489 codec_port_old = codec_port; 490 } 491 } 492 493 return 0; 494 } 495 496 static int graph_for_each_link(struct asoc_simple_priv *priv, 497 struct link_info *li, 498 int (*func_noml)(struct asoc_simple_priv *priv, 499 struct device_node *cpu_ep, 500 struct device_node *codec_ep, 501 struct link_info *li), 502 int (*func_dpcm)(struct asoc_simple_priv *priv, 503 struct device_node *cpu_ep, 504 struct device_node *codec_ep, 505 struct link_info *li)) 506 { 507 int ret; 508 /* 509 * Detect all CPU first, and Detect all Codec 2nd. 510 * 511 * In Normal sound case, all DAIs are detected 512 * as "CPU-Codec". 513 * 514 * In DPCM sound case, 515 * all CPUs are detected as "CPU-dummy", and 516 * all Codecs are detected as "dummy-Codec". 517 * To avoid random sub-device numbering, 518 * detect "dummy-Codec" in last; 519 */ 520 for (li->cpu = 1; li->cpu >= 0; li->cpu--) { 521 ret = __graph_for_each_link(priv, li, func_noml, func_dpcm); 522 if (ret < 0) 523 break; 524 } 525 526 return ret; 527 } 528 529 static int graph_get_dais_count(struct asoc_simple_priv *priv, 530 struct link_info *li); 531 532 int audio_graph_parse_of(struct asoc_simple_priv *priv, struct device *dev) 533 { 534 struct snd_soc_card *card = simple_priv_to_card(priv); 535 struct link_info *li; 536 int ret; 537 538 li = devm_kzalloc(dev, sizeof(*li), GFP_KERNEL); 539 if (!li) 540 return -ENOMEM; 541 542 card->owner = THIS_MODULE; 543 card->dev = dev; 544 545 ret = graph_get_dais_count(priv, li); 546 if (ret < 0) 547 return ret; 548 549 if (!li->link) 550 return -EINVAL; 551 552 ret = asoc_simple_init_priv(priv, li); 553 if (ret < 0) 554 return ret; 555 556 priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW); 557 if (IS_ERR(priv->pa_gpio)) { 558 ret = PTR_ERR(priv->pa_gpio); 559 dev_err(dev, "failed to get amplifier gpio: %d\n", ret); 560 return ret; 561 } 562 563 ret = asoc_simple_parse_widgets(card, NULL); 564 if (ret < 0) 565 return ret; 566 567 ret = asoc_simple_parse_routing(card, NULL); 568 if (ret < 0) 569 return ret; 570 571 memset(li, 0, sizeof(*li)); 572 ret = graph_for_each_link(priv, li, 573 graph_dai_link_of, 574 graph_dai_link_of_dpcm); 575 if (ret < 0) 576 goto err; 577 578 ret = asoc_simple_parse_card_name(card, NULL); 579 if (ret < 0) 580 goto err; 581 582 snd_soc_card_set_drvdata(card, priv); 583 584 asoc_simple_debug_info(priv); 585 586 ret = devm_snd_soc_register_card(dev, card); 587 if (ret < 0) 588 goto err; 589 590 devm_kfree(dev, li); 591 return 0; 592 593 err: 594 asoc_simple_clean_reference(card); 595 596 if (ret != -EPROBE_DEFER) 597 dev_err(dev, "parse error %d\n", ret); 598 599 return ret; 600 } 601 EXPORT_SYMBOL_GPL(audio_graph_parse_of); 602 603 static int graph_count_noml(struct asoc_simple_priv *priv, 604 struct device_node *cpu_ep, 605 struct device_node *codec_ep, 606 struct link_info *li) 607 { 608 struct device *dev = simple_priv_to_dev(priv); 609 610 if (li->link >= SNDRV_MAX_LINKS) { 611 dev_err(dev, "too many links\n"); 612 return -EINVAL; 613 } 614 615 li->num[li->link].cpus = 1; 616 li->num[li->link].codecs = 1; 617 li->num[li->link].platforms = 1; 618 619 li->link += 1; /* 1xCPU-Codec */ 620 621 dev_dbg(dev, "Count As Normal\n"); 622 623 return 0; 624 } 625 626 static int graph_count_dpcm(struct asoc_simple_priv *priv, 627 struct device_node *cpu_ep, 628 struct device_node *codec_ep, 629 struct link_info *li) 630 { 631 struct device *dev = simple_priv_to_dev(priv); 632 633 if (li->link >= SNDRV_MAX_LINKS) { 634 dev_err(dev, "too many links\n"); 635 return -EINVAL; 636 } 637 638 if (li->cpu) { 639 li->num[li->link].cpus = 1; 640 li->num[li->link].platforms = 1; 641 642 li->link++; /* 1xCPU-dummy */ 643 } else { 644 li->num[li->link].codecs = 1; 645 646 li->link++; /* 1xdummy-Codec */ 647 } 648 649 dev_dbg(dev, "Count As DPCM\n"); 650 651 return 0; 652 } 653 654 static int graph_get_dais_count(struct asoc_simple_priv *priv, 655 struct link_info *li) 656 { 657 /* 658 * link_num : number of links. 659 * CPU-Codec / CPU-dummy / dummy-Codec 660 * dais_num : number of DAIs 661 * ccnf_num : number of codec_conf 662 * same number for "dummy-Codec" 663 * 664 * ex1) 665 * CPU0 --- Codec0 link : 5 666 * CPU1 --- Codec1 dais : 7 667 * CPU2 -/ ccnf : 1 668 * CPU3 --- Codec2 669 * 670 * => 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec 671 * => 7 DAIs = 4xCPU + 3xCodec 672 * => 1 ccnf = 1xdummy-Codec 673 * 674 * ex2) 675 * CPU0 --- Codec0 link : 5 676 * CPU1 --- Codec1 dais : 6 677 * CPU2 -/ ccnf : 1 678 * CPU3 -/ 679 * 680 * => 5 links = 1xCPU-Codec + 3xCPU-dummy + 1xdummy-Codec 681 * => 6 DAIs = 4xCPU + 2xCodec 682 * => 1 ccnf = 1xdummy-Codec 683 * 684 * ex3) 685 * CPU0 --- Codec0 link : 6 686 * CPU1 -/ dais : 6 687 * CPU2 --- Codec1 ccnf : 2 688 * CPU3 -/ 689 * 690 * => 6 links = 0xCPU-Codec + 4xCPU-dummy + 2xdummy-Codec 691 * => 6 DAIs = 4xCPU + 2xCodec 692 * => 2 ccnf = 2xdummy-Codec 693 * 694 * ex4) 695 * CPU0 --- Codec0 (convert-rate) link : 3 696 * CPU1 --- Codec1 dais : 4 697 * ccnf : 1 698 * 699 * => 3 links = 1xCPU-Codec + 1xCPU-dummy + 1xdummy-Codec 700 * => 4 DAIs = 2xCPU + 2xCodec 701 * => 1 ccnf = 1xdummy-Codec 702 */ 703 return graph_for_each_link(priv, li, 704 graph_count_noml, 705 graph_count_dpcm); 706 } 707 708 static int graph_probe(struct platform_device *pdev) 709 { 710 struct asoc_simple_priv *priv; 711 struct device *dev = &pdev->dev; 712 struct snd_soc_card *card; 713 714 /* Allocate the private data and the DAI link array */ 715 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 716 if (!priv) 717 return -ENOMEM; 718 719 card = simple_priv_to_card(priv); 720 card->dapm_widgets = graph_dapm_widgets; 721 card->num_dapm_widgets = ARRAY_SIZE(graph_dapm_widgets); 722 card->probe = asoc_graph_card_probe; 723 724 if (of_device_get_match_data(dev)) 725 priv->dpcm_selectable = 1; 726 727 return audio_graph_parse_of(priv, dev); 728 } 729 730 static const struct of_device_id graph_of_match[] = { 731 { .compatible = "audio-graph-card", }, 732 { .compatible = "audio-graph-scu-card", 733 .data = (void *)DPCM_SELECTABLE }, 734 {}, 735 }; 736 MODULE_DEVICE_TABLE(of, graph_of_match); 737 738 static struct platform_driver graph_card = { 739 .driver = { 740 .name = "asoc-audio-graph-card", 741 .pm = &snd_soc_pm_ops, 742 .of_match_table = graph_of_match, 743 }, 744 .probe = graph_probe, 745 .remove = asoc_simple_remove, 746 }; 747 module_platform_driver(graph_card); 748 749 MODULE_ALIAS("platform:asoc-audio-graph-card"); 750 MODULE_LICENSE("GPL v2"); 751 MODULE_DESCRIPTION("ASoC Audio Graph Sound Card"); 752 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 753