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 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 } 173 174 static 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 } 193 194 static 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 } 210 211 static 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 } 248 249 static 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 } 271 272 static 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 } 365 366 static 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 } 403 404 static 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 } 425 426 static 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 } 499 500 static 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 } 532 533 static int graph_get_dais_count(struct asoc_simple_priv *priv, 534 struct link_info *li); 535 536 int 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; 596 597 err: 598 asoc_simple_clean_reference(card); 599 600 return dev_err_probe(dev, ret, "parse error\n"); 601 } 602 EXPORT_SYMBOL_GPL(audio_graph_parse_of); 603 604 static 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 } 626 627 static 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 } 654 655 static 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 } 708 709 static 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 } 730 731 static 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 }; 737 MODULE_DEVICE_TABLE(of, graph_of_match); 738 739 static 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 }; 748 module_platform_driver(graph_card); 749 750 MODULE_ALIAS("platform:asoc-audio-graph-card"); 751 MODULE_LICENSE("GPL v2"); 752 MODULE_DESCRIPTION("ASoC Audio Graph Sound Card"); 753 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 754