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