sound/soc/generic/audio-graph-card.c

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