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/cleanup.h> 11 #include <linux/clk.h> 12 #include <linux/device.h> 13 #include <linux/gpio/consumer.h> 14 #include <linux/module.h> 15 #include <linux/of.h> 16 #include <linux/of_graph.h> 17 #include <linux/platform_device.h> 18 #include <linux/string.h> 19 #include <sound/graph_card.h> 20 21 #define DPCM_SELECTABLE 1 22 23 #define ep_to_port(ep) of_get_parent(ep) 24 static struct device_node *port_to_ports(struct device_node *port) 25 { 26 struct device_node *ports = of_get_parent(port); 27 28 if (!of_node_name_eq(ports, "ports")) { 29 of_node_put(ports); 30 return NULL; 31 } 32 return ports; 33 } 34 35 static int graph_outdrv_event(struct snd_soc_dapm_widget *w, 36 struct snd_kcontrol *kcontrol, 37 int event) 38 { 39 struct snd_soc_dapm_context *dapm = w->dapm; 40 struct simple_util_priv *priv = snd_soc_card_get_drvdata(dapm->card); 41 42 switch (event) { 43 case SND_SOC_DAPM_POST_PMU: 44 gpiod_set_value_cansleep(priv->pa_gpio, 1); 45 break; 46 case SND_SOC_DAPM_PRE_PMD: 47 gpiod_set_value_cansleep(priv->pa_gpio, 0); 48 break; 49 default: 50 return -EINVAL; 51 } 52 53 return 0; 54 } 55 56 static const struct snd_soc_dapm_widget graph_dapm_widgets[] = { 57 SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM, 58 0, 0, NULL, 0, graph_outdrv_event, 59 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 60 }; 61 62 static const struct snd_soc_ops graph_ops = { 63 .startup = simple_util_startup, 64 .shutdown = simple_util_shutdown, 65 .hw_params = simple_util_hw_params, 66 }; 67 68 static bool soc_component_is_pcm(struct snd_soc_dai_link_component *dlc) 69 { 70 struct snd_soc_dai *dai = snd_soc_find_dai_with_mutex(dlc); 71 72 if (dai && (dai->component->driver->pcm_construct || 73 (dai->driver->ops && dai->driver->ops->pcm_new))) 74 return true; 75 76 return false; 77 } 78 79 static void graph_parse_convert(struct device *dev, 80 struct device_node *ep, 81 struct simple_util_data *adata) 82 { 83 struct device_node *top = dev->of_node; 84 struct device_node *port = ep_to_port(ep); 85 struct device_node *ports = port_to_ports(port); 86 struct device_node *node = of_graph_get_port_parent(ep); 87 88 simple_util_parse_convert(top, NULL, adata); 89 simple_util_parse_convert(ports, NULL, adata); 90 simple_util_parse_convert(port, NULL, adata); 91 simple_util_parse_convert(ep, NULL, adata); 92 93 of_node_put(port); 94 of_node_put(ports); 95 of_node_put(node); 96 } 97 98 static int graph_parse_node(struct simple_util_priv *priv, 99 struct device_node *ep, 100 struct link_info *li, 101 int *cpu) 102 { 103 struct device *dev = simple_priv_to_dev(priv); 104 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); 105 struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link); 106 struct snd_soc_dai_link_component *dlc; 107 struct simple_util_dai *dai; 108 int ret; 109 110 if (cpu) { 111 dlc = snd_soc_link_to_cpu(dai_link, 0); 112 dai = simple_props_to_dai_cpu(dai_props, 0); 113 } else { 114 dlc = snd_soc_link_to_codec(dai_link, 0); 115 dai = simple_props_to_dai_codec(dai_props, 0); 116 } 117 118 ret = graph_util_parse_dai(dev, ep, dlc, cpu); 119 if (ret < 0) 120 return ret; 121 122 ret = simple_util_parse_tdm(ep, dai); 123 if (ret < 0) 124 return ret; 125 126 ret = simple_util_parse_clk(dev, ep, dai, dlc); 127 if (ret < 0) 128 return ret; 129 130 return 0; 131 } 132 133 static int graph_link_init(struct simple_util_priv *priv, 134 struct device_node *ep_cpu, 135 struct device_node *ep_codec, 136 struct link_info *li, 137 char *name) 138 { 139 struct device *dev = simple_priv_to_dev(priv); 140 struct device_node *top = dev->of_node; 141 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); 142 struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link); 143 struct device_node *port_cpu = ep_to_port(ep_cpu); 144 struct device_node *port_codec = ep_to_port(ep_codec); 145 struct device_node *ports_cpu = port_to_ports(port_cpu); 146 struct device_node *ports_codec = port_to_ports(port_codec); 147 enum snd_soc_trigger_order trigger_start = SND_SOC_TRIGGER_ORDER_DEFAULT; 148 enum snd_soc_trigger_order trigger_stop = SND_SOC_TRIGGER_ORDER_DEFAULT; 149 bool playback_only = 0, capture_only = 0; 150 int ret; 151 152 ret = simple_util_parse_daifmt(dev, ep_cpu, ep_codec, 153 NULL, &dai_link->dai_fmt); 154 if (ret < 0) 155 goto init_end; 156 157 graph_util_parse_link_direction(top, &playback_only, &capture_only); 158 graph_util_parse_link_direction(port_cpu, &playback_only, &capture_only); 159 graph_util_parse_link_direction(port_codec, &playback_only, &capture_only); 160 graph_util_parse_link_direction(ep_cpu, &playback_only, &capture_only); 161 graph_util_parse_link_direction(ep_codec, &playback_only, &capture_only); 162 163 of_property_read_u32(top, "mclk-fs", &dai_props->mclk_fs); 164 of_property_read_u32(ports_cpu, "mclk-fs", &dai_props->mclk_fs); 165 of_property_read_u32(ports_codec, "mclk-fs", &dai_props->mclk_fs); 166 of_property_read_u32(port_cpu, "mclk-fs", &dai_props->mclk_fs); 167 of_property_read_u32(port_codec, "mclk-fs", &dai_props->mclk_fs); 168 of_property_read_u32(ep_cpu, "mclk-fs", &dai_props->mclk_fs); 169 of_property_read_u32(ep_codec, "mclk-fs", &dai_props->mclk_fs); 170 171 graph_util_parse_trigger_order(priv, top, &trigger_start, &trigger_stop); 172 graph_util_parse_trigger_order(priv, ports_cpu, &trigger_start, &trigger_stop); 173 graph_util_parse_trigger_order(priv, ports_codec, &trigger_start, &trigger_stop); 174 graph_util_parse_trigger_order(priv, port_cpu, &trigger_start, &trigger_stop); 175 graph_util_parse_trigger_order(priv, port_cpu, &trigger_start, &trigger_stop); 176 graph_util_parse_trigger_order(priv, ep_cpu, &trigger_start, &trigger_stop); 177 graph_util_parse_trigger_order(priv, ep_codec, &trigger_start, &trigger_stop); 178 179 dai_link->playback_only = playback_only; 180 dai_link->capture_only = capture_only; 181 182 dai_link->trigger_start = trigger_start; 183 dai_link->trigger_stop = trigger_stop; 184 185 dai_link->init = simple_util_dai_init; 186 dai_link->ops = &graph_ops; 187 if (priv->ops) 188 dai_link->ops = priv->ops; 189 190 ret = simple_util_set_dailink_name(dev, dai_link, name); 191 init_end: 192 of_node_put(ports_cpu); 193 of_node_put(ports_codec); 194 of_node_put(port_cpu); 195 of_node_put(port_codec); 196 197 return ret; 198 } 199 200 static int graph_dai_link_of_dpcm(struct simple_util_priv *priv, 201 struct device_node *cpu_ep, 202 struct device_node *codec_ep, 203 struct link_info *li) 204 { 205 struct device *dev = simple_priv_to_dev(priv); 206 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); 207 struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link); 208 struct device_node *top = dev->of_node; 209 struct device_node *ep = li->cpu ? cpu_ep : codec_ep; 210 char dai_name[64]; 211 int ret; 212 213 dev_dbg(dev, "link_of DPCM (%pOF)\n", ep); 214 215 if (li->cpu) { 216 struct snd_soc_card *card = simple_priv_to_card(priv); 217 struct snd_soc_dai_link_component *cpus = snd_soc_link_to_cpu(dai_link, 0); 218 struct snd_soc_dai_link_component *platforms = snd_soc_link_to_platform(dai_link, 0); 219 int is_single_links = 0; 220 221 /* Codec is dummy */ 222 223 /* FE settings */ 224 dai_link->dynamic = 1; 225 dai_link->dpcm_merged_format = 1; 226 227 ret = graph_parse_node(priv, cpu_ep, li, &is_single_links); 228 if (ret) 229 return ret; 230 231 snprintf(dai_name, sizeof(dai_name), 232 "fe.%pOFP.%s", cpus->of_node, cpus->dai_name); 233 /* 234 * In BE<->BE connections it is not required to create 235 * PCM devices at CPU end of the dai link and thus 'no_pcm' 236 * flag needs to be set. It is useful when there are many 237 * BE components and some of these have to be connected to 238 * form a valid audio path. 239 * 240 * For example: FE <-> BE1 <-> BE2 <-> ... <-> BEn where 241 * there are 'n' BE components in the path. 242 */ 243 if (card->component_chaining && !soc_component_is_pcm(cpus)) { 244 dai_link->no_pcm = 1; 245 dai_link->be_hw_params_fixup = simple_util_be_hw_params_fixup; 246 } 247 248 simple_util_canonicalize_cpu(cpus, is_single_links); 249 simple_util_canonicalize_platform(platforms, cpus); 250 } else { 251 struct snd_soc_codec_conf *cconf = simple_props_to_codec_conf(dai_props, 0); 252 struct snd_soc_dai_link_component *codecs = snd_soc_link_to_codec(dai_link, 0); 253 struct device_node *port; 254 struct device_node *ports; 255 256 /* CPU is dummy */ 257 258 /* BE settings */ 259 dai_link->no_pcm = 1; 260 dai_link->be_hw_params_fixup = simple_util_be_hw_params_fixup; 261 262 ret = graph_parse_node(priv, codec_ep, li, NULL); 263 if (ret < 0) 264 return ret; 265 266 snprintf(dai_name, sizeof(dai_name), 267 "be.%pOFP.%s", codecs->of_node, codecs->dai_name); 268 269 /* check "prefix" from top node */ 270 port = ep_to_port(ep); 271 ports = port_to_ports(port); 272 snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node, "prefix"); 273 snd_soc_of_parse_node_prefix(ports, cconf, codecs->of_node, "prefix"); 274 snd_soc_of_parse_node_prefix(port, cconf, codecs->of_node, "prefix"); 275 276 of_node_put(ports); 277 of_node_put(port); 278 } 279 280 graph_parse_convert(dev, ep, &dai_props->adata); 281 282 snd_soc_dai_link_set_capabilities(dai_link); 283 284 ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name); 285 286 li->link++; 287 288 return ret; 289 } 290 291 static int graph_dai_link_of(struct simple_util_priv *priv, 292 struct device_node *cpu_ep, 293 struct device_node *codec_ep, 294 struct link_info *li) 295 { 296 struct device *dev = simple_priv_to_dev(priv); 297 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); 298 struct snd_soc_dai_link_component *cpus = snd_soc_link_to_cpu(dai_link, 0); 299 struct snd_soc_dai_link_component *codecs = snd_soc_link_to_codec(dai_link, 0); 300 struct snd_soc_dai_link_component *platforms = snd_soc_link_to_platform(dai_link, 0); 301 char dai_name[64]; 302 int ret, is_single_links = 0; 303 304 dev_dbg(dev, "link_of (%pOF)\n", cpu_ep); 305 306 ret = graph_parse_node(priv, cpu_ep, li, &is_single_links); 307 if (ret < 0) 308 return ret; 309 310 ret = graph_parse_node(priv, codec_ep, li, NULL); 311 if (ret < 0) 312 return ret; 313 314 snprintf(dai_name, sizeof(dai_name), 315 "%s-%s", cpus->dai_name, codecs->dai_name); 316 317 simple_util_canonicalize_cpu(cpus, is_single_links); 318 simple_util_canonicalize_platform(platforms, cpus); 319 320 ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name); 321 if (ret < 0) 322 return ret; 323 324 li->link++; 325 326 return 0; 327 } 328 329 static inline bool parse_as_dpcm_link(struct simple_util_priv *priv, 330 struct device_node *codec_port, 331 struct simple_util_data *adata) 332 { 333 if (priv->force_dpcm) 334 return true; 335 336 if (!priv->dpcm_selectable) 337 return false; 338 339 /* 340 * It is DPCM 341 * if Codec port has many endpoints, 342 * or has convert-xxx property 343 */ 344 if ((of_get_child_count(codec_port) > 1) || 345 simple_util_is_convert_required(adata)) 346 return true; 347 348 return false; 349 } 350 351 static int __graph_for_each_link(struct simple_util_priv *priv, 352 struct link_info *li, 353 int (*func_noml)(struct simple_util_priv *priv, 354 struct device_node *cpu_ep, 355 struct device_node *codec_ep, 356 struct link_info *li), 357 int (*func_dpcm)(struct simple_util_priv *priv, 358 struct device_node *cpu_ep, 359 struct device_node *codec_ep, 360 struct link_info *li)) 361 { 362 struct of_phandle_iterator it; 363 struct device *dev = simple_priv_to_dev(priv); 364 struct device_node *node = dev->of_node; 365 struct device_node *cpu_port; 366 struct device_node *cpu_ep; 367 struct device_node *codec_ep; 368 struct device_node *codec_port; 369 struct device_node *codec_port_old = NULL; 370 struct simple_util_data adata; 371 int rc, ret = 0; 372 373 /* loop for all listed CPU port */ 374 of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { 375 cpu_port = it.node; 376 cpu_ep = NULL; 377 378 /* loop for all CPU endpoint */ 379 while (1) { 380 cpu_ep = of_get_next_child(cpu_port, cpu_ep); 381 if (!cpu_ep) 382 break; 383 384 /* get codec */ 385 codec_ep = of_graph_get_remote_endpoint(cpu_ep); 386 codec_port = ep_to_port(codec_ep); 387 388 /* get convert-xxx property */ 389 memset(&adata, 0, sizeof(adata)); 390 graph_parse_convert(dev, codec_ep, &adata); 391 graph_parse_convert(dev, cpu_ep, &adata); 392 393 /* check if link requires DPCM parsing */ 394 if (parse_as_dpcm_link(priv, codec_port, &adata)) { 395 /* 396 * Codec endpoint can be NULL for pluggable audio HW. 397 * Platform DT can populate the Codec endpoint depending on the 398 * plugged HW. 399 */ 400 /* Do it all CPU endpoint, and 1st Codec endpoint */ 401 if (li->cpu || 402 ((codec_port_old != codec_port) && codec_ep)) 403 ret = func_dpcm(priv, cpu_ep, codec_ep, li); 404 /* else normal sound */ 405 } else { 406 if (li->cpu) 407 ret = func_noml(priv, cpu_ep, codec_ep, li); 408 } 409 410 of_node_put(codec_ep); 411 of_node_put(codec_port); 412 413 if (ret < 0) { 414 of_node_put(cpu_ep); 415 return ret; 416 } 417 418 codec_port_old = codec_port; 419 } 420 } 421 422 return 0; 423 } 424 425 static int graph_for_each_link(struct simple_util_priv *priv, 426 struct link_info *li, 427 int (*func_noml)(struct simple_util_priv *priv, 428 struct device_node *cpu_ep, 429 struct device_node *codec_ep, 430 struct link_info *li), 431 int (*func_dpcm)(struct simple_util_priv *priv, 432 struct device_node *cpu_ep, 433 struct device_node *codec_ep, 434 struct link_info *li)) 435 { 436 int ret; 437 /* 438 * Detect all CPU first, and Detect all Codec 2nd. 439 * 440 * In Normal sound case, all DAIs are detected 441 * as "CPU-Codec". 442 * 443 * In DPCM sound case, 444 * all CPUs are detected as "CPU-dummy", and 445 * all Codecs are detected as "dummy-Codec". 446 * To avoid random sub-device numbering, 447 * detect "dummy-Codec" in last; 448 */ 449 for (li->cpu = 1; li->cpu >= 0; li->cpu--) { 450 ret = __graph_for_each_link(priv, li, func_noml, func_dpcm); 451 if (ret < 0) 452 break; 453 } 454 455 return ret; 456 } 457 458 static int graph_count_noml(struct simple_util_priv *priv, 459 struct device_node *cpu_ep, 460 struct device_node *codec_ep, 461 struct link_info *li) 462 { 463 struct device *dev = simple_priv_to_dev(priv); 464 465 if (li->link >= SNDRV_MAX_LINKS) { 466 dev_err(dev, "too many links\n"); 467 return -EINVAL; 468 } 469 470 /* 471 * DON'T REMOVE platforms 472 * see 473 * simple-card.c :: simple_count_noml() 474 */ 475 li->num[li->link].cpus = 1; 476 li->num[li->link].platforms = 1; 477 478 li->num[li->link].codecs = 1; 479 480 li->link += 1; /* 1xCPU-Codec */ 481 482 dev_dbg(dev, "Count As Normal\n"); 483 484 return 0; 485 } 486 487 static int graph_count_dpcm(struct simple_util_priv *priv, 488 struct device_node *cpu_ep, 489 struct device_node *codec_ep, 490 struct link_info *li) 491 { 492 struct device *dev = simple_priv_to_dev(priv); 493 494 if (li->link >= SNDRV_MAX_LINKS) { 495 dev_err(dev, "too many links\n"); 496 return -EINVAL; 497 } 498 499 if (li->cpu) { 500 /* 501 * DON'T REMOVE platforms 502 * see 503 * simple-card.c :: simple_count_noml() 504 */ 505 li->num[li->link].cpus = 1; 506 li->num[li->link].platforms = 1; 507 508 li->link++; /* 1xCPU-dummy */ 509 } else { 510 li->num[li->link].codecs = 1; 511 512 li->link++; /* 1xdummy-Codec */ 513 } 514 515 dev_dbg(dev, "Count As DPCM\n"); 516 517 return 0; 518 } 519 520 static int graph_get_dais_count(struct simple_util_priv *priv, 521 struct link_info *li) 522 { 523 /* 524 * link_num : number of links. 525 * CPU-Codec / CPU-dummy / dummy-Codec 526 * dais_num : number of DAIs 527 * ccnf_num : number of codec_conf 528 * same number for "dummy-Codec" 529 * 530 * ex1) 531 * CPU0 --- Codec0 link : 5 532 * CPU1 --- Codec1 dais : 7 533 * CPU2 -/ ccnf : 1 534 * CPU3 --- Codec2 535 * 536 * => 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec 537 * => 7 DAIs = 4xCPU + 3xCodec 538 * => 1 ccnf = 1xdummy-Codec 539 * 540 * ex2) 541 * CPU0 --- Codec0 link : 5 542 * CPU1 --- Codec1 dais : 6 543 * CPU2 -/ ccnf : 1 544 * CPU3 -/ 545 * 546 * => 5 links = 1xCPU-Codec + 3xCPU-dummy + 1xdummy-Codec 547 * => 6 DAIs = 4xCPU + 2xCodec 548 * => 1 ccnf = 1xdummy-Codec 549 * 550 * ex3) 551 * CPU0 --- Codec0 link : 6 552 * CPU1 -/ dais : 6 553 * CPU2 --- Codec1 ccnf : 2 554 * CPU3 -/ 555 * 556 * => 6 links = 0xCPU-Codec + 4xCPU-dummy + 2xdummy-Codec 557 * => 6 DAIs = 4xCPU + 2xCodec 558 * => 2 ccnf = 2xdummy-Codec 559 * 560 * ex4) 561 * CPU0 --- Codec0 (convert-rate) link : 3 562 * CPU1 --- Codec1 dais : 4 563 * ccnf : 1 564 * 565 * => 3 links = 1xCPU-Codec + 1xCPU-dummy + 1xdummy-Codec 566 * => 4 DAIs = 2xCPU + 2xCodec 567 * => 1 ccnf = 1xdummy-Codec 568 */ 569 return graph_for_each_link(priv, li, 570 graph_count_noml, 571 graph_count_dpcm); 572 } 573 574 int audio_graph_parse_of(struct simple_util_priv *priv, struct device *dev) 575 { 576 struct snd_soc_card *card = simple_priv_to_card(priv); 577 int ret; 578 579 struct link_info *li __free(kfree) = kzalloc(sizeof(*li), GFP_KERNEL); 580 if (!li) 581 return -ENOMEM; 582 583 card->owner = THIS_MODULE; 584 card->dev = dev; 585 586 ret = graph_get_dais_count(priv, li); 587 if (ret < 0) 588 return ret; 589 590 if (!li->link) 591 return -EINVAL; 592 593 ret = simple_util_init_priv(priv, li); 594 if (ret < 0) 595 return ret; 596 597 priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW); 598 if (IS_ERR(priv->pa_gpio)) { 599 ret = PTR_ERR(priv->pa_gpio); 600 dev_err(dev, "failed to get amplifier gpio: %d\n", ret); 601 return ret; 602 } 603 604 ret = simple_util_parse_widgets(card, NULL); 605 if (ret < 0) 606 return ret; 607 608 ret = simple_util_parse_routing(card, NULL); 609 if (ret < 0) 610 return ret; 611 612 memset(li, 0, sizeof(*li)); 613 ret = graph_for_each_link(priv, li, 614 graph_dai_link_of, 615 graph_dai_link_of_dpcm); 616 if (ret < 0) 617 goto err; 618 619 ret = simple_util_parse_card_name(card, NULL); 620 if (ret < 0) 621 goto err; 622 623 snd_soc_card_set_drvdata(card, priv); 624 625 simple_util_debug_info(priv); 626 627 ret = devm_snd_soc_register_card(dev, card); 628 if (ret < 0) 629 goto err; 630 631 return 0; 632 633 err: 634 simple_util_clean_reference(card); 635 636 return dev_err_probe(dev, ret, "parse error\n"); 637 } 638 EXPORT_SYMBOL_GPL(audio_graph_parse_of); 639 640 static int graph_probe(struct platform_device *pdev) 641 { 642 struct simple_util_priv *priv; 643 struct device *dev = &pdev->dev; 644 struct snd_soc_card *card; 645 646 /* Allocate the private data and the DAI link array */ 647 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 648 if (!priv) 649 return -ENOMEM; 650 651 card = simple_priv_to_card(priv); 652 card->dapm_widgets = graph_dapm_widgets; 653 card->num_dapm_widgets = ARRAY_SIZE(graph_dapm_widgets); 654 card->probe = graph_util_card_probe; 655 656 if (of_device_get_match_data(dev)) 657 priv->dpcm_selectable = 1; 658 659 return audio_graph_parse_of(priv, dev); 660 } 661 662 static const struct of_device_id graph_of_match[] = { 663 { .compatible = "audio-graph-card", }, 664 { .compatible = "audio-graph-scu-card", 665 .data = (void *)DPCM_SELECTABLE }, 666 {}, 667 }; 668 MODULE_DEVICE_TABLE(of, graph_of_match); 669 670 static struct platform_driver graph_card = { 671 .driver = { 672 .name = "asoc-audio-graph-card", 673 .pm = &snd_soc_pm_ops, 674 .of_match_table = graph_of_match, 675 }, 676 .probe = graph_probe, 677 .remove_new = simple_util_remove, 678 }; 679 module_platform_driver(graph_card); 680 681 MODULE_ALIAS("platform:asoc-audio-graph-card"); 682 MODULE_LICENSE("GPL v2"); 683 MODULE_DESCRIPTION("ASoC Audio Graph Sound Card"); 684 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 685