sound/soc/generic/simple-card.c

   1 /*
   2  * ASoC simple sound card support
   3  *
   4  * Copyright (C) 2012 Renesas Solutions Corp.
   5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11 #include <linux/clk.h>
  12 #include <linux/device.h>
  13 #include <linux/gpio.h>
  14 #include <linux/module.h>
  15 #include <linux/of.h>
  16 #include <linux/of_gpio.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/string.h>
  19 #include <sound/jack.h>
  20 #include <sound/simple_card.h>
  21 #include <sound/soc-dai.h>
  22 #include <sound/soc.h>
  23
  24 struct simple_card_data {
  25         struct snd_soc_card snd_card;
  26         struct simple_dai_props {
  27                 struct asoc_simple_dai cpu_dai;
  28                 struct asoc_simple_dai codec_dai;
  29         } *dai_props;
  30         unsigned int mclk_fs;
  31         int gpio_hp_det;
  32         int gpio_hp_det_invert;
  33         int gpio_mic_det;
  34         int gpio_mic_det_invert;
  35         struct snd_soc_dai_link dai_link[];     /* dynamically allocated */
  36 };
  37
  38 #define simple_priv_to_dev(priv) ((priv)->snd_card.dev)
  39 #define simple_priv_to_link(priv, i) ((priv)->snd_card.dai_link + i)
  40 #define simple_priv_to_props(priv, i) ((priv)->dai_props + i)
  41
  42 static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
  43 {
  44         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  45         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
  46         struct simple_dai_props *dai_props =
  47                 &priv->dai_props[rtd - rtd->card->rtd];
  48         int ret;
  49
  50         ret = clk_prepare_enable(dai_props->cpu_dai.clk);
  51         if (ret)
  52                 return ret;
  53
  54         ret = clk_prepare_enable(dai_props->codec_dai.clk);
  55         if (ret)
  56                 clk_disable_unprepare(dai_props->cpu_dai.clk);
  57
  58         return ret;
  59 }
  60
  61 static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
  62 {
  63         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  64         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
  65         struct simple_dai_props *dai_props =
  66                 &priv->dai_props[rtd - rtd->card->rtd];
  67
  68         clk_disable_unprepare(dai_props->cpu_dai.clk);
  69
  70         clk_disable_unprepare(dai_props->codec_dai.clk);
  71 }
  72
  73 static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream,
  74                                       struct snd_pcm_hw_params *params)
  75 {
  76         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  77         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  78         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
  79         unsigned int mclk;
  80         int ret = 0;
  81
  82         if (priv->mclk_fs) {
  83                 mclk = params_rate(params) * priv->mclk_fs;
  84                 ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
  85                                              SND_SOC_CLOCK_IN);
  86         }
  87
  88         return ret;
  89 }
  90
  91 static struct snd_soc_ops asoc_simple_card_ops = {
  92         .startup = asoc_simple_card_startup,
  93         .shutdown = asoc_simple_card_shutdown,
  94         .hw_params = asoc_simple_card_hw_params,
  95 };
  96
  97 static struct snd_soc_jack simple_card_hp_jack;
  98 static struct snd_soc_jack_pin simple_card_hp_jack_pins[] = {
  99         {
 100                 .pin = "Headphones",
 101                 .mask = SND_JACK_HEADPHONE,
 102         },
 103 };
 104 static struct snd_soc_jack_gpio simple_card_hp_jack_gpio = {
 105         .name = "Headphone detection",
 106         .report = SND_JACK_HEADPHONE,
 107         .debounce_time = 150,
 108 };
 109
 110 static struct snd_soc_jack simple_card_mic_jack;
 111 static struct snd_soc_jack_pin simple_card_mic_jack_pins[] = {
 112         {
 113                 .pin = "Mic Jack",
 114                 .mask = SND_JACK_MICROPHONE,
 115         },
 116 };
 117 static struct snd_soc_jack_gpio simple_card_mic_jack_gpio = {
 118         .name = "Mic detection",
 119         .report = SND_JACK_MICROPHONE,
 120         .debounce_time = 150,
 121 };
 122
 123 static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
 124                                        struct asoc_simple_dai *set)
 125 {
 126         int ret;
 127
 128         if (set->fmt) {
 129                 ret = snd_soc_dai_set_fmt(dai, set->fmt);
 130                 if (ret && ret != -ENOTSUPP) {
 131                         dev_err(dai->dev, "simple-card: set_fmt error\n");
 132                         goto err;
 133                 }
 134         }
 135
 136         if (set->sysclk) {
 137                 ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0);
 138                 if (ret && ret != -ENOTSUPP) {
 139                         dev_err(dai->dev, "simple-card: set_sysclk error\n");
 140                         goto err;
 141                 }
 142         }
 143
 144         if (set->slots) {
 145                 ret = snd_soc_dai_set_tdm_slot(dai, 0, 0,
 146                                                 set->slots,
 147                                                 set->slot_width);
 148                 if (ret && ret != -ENOTSUPP) {
 149                         dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
 150                         goto err;
 151                 }
 152         }
 153
 154         ret = 0;
 155
 156 err:
 157         return ret;
 158 }
 159
 160 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
 161 {
 162         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
 163         struct snd_soc_dai *codec = rtd->codec_dai;
 164         struct snd_soc_dai *cpu = rtd->cpu_dai;
 165         struct simple_dai_props *dai_props;
 166         int num, ret;
 167
 168         num = rtd - rtd->card->rtd;
 169         dai_props = &priv->dai_props[num];
 170         ret = __asoc_simple_card_dai_init(codec, &dai_props->codec_dai);
 171         if (ret < 0)
 172                 return ret;
 173
 174         ret = __asoc_simple_card_dai_init(cpu, &dai_props->cpu_dai);
 175         if (ret < 0)
 176                 return ret;
 177
 178         if (gpio_is_valid(priv->gpio_hp_det)) {
 179                 snd_soc_jack_new(codec->codec, "Headphones", SND_JACK_HEADPHONE,
 180                                  &simple_card_hp_jack);
 181                 snd_soc_jack_add_pins(&simple_card_hp_jack,
 182                                       ARRAY_SIZE(simple_card_hp_jack_pins),
 183                                       simple_card_hp_jack_pins);
 184
 185                 simple_card_hp_jack_gpio.gpio = priv->gpio_hp_det;
 186                 simple_card_hp_jack_gpio.invert = priv->gpio_hp_det_invert;
 187                 snd_soc_jack_add_gpios(&simple_card_hp_jack, 1,
 188                                        &simple_card_hp_jack_gpio);
 189         }
 190
 191         if (gpio_is_valid(priv->gpio_mic_det)) {
 192                 snd_soc_jack_new(codec->codec, "Mic Jack", SND_JACK_MICROPHONE,
 193                                  &simple_card_mic_jack);
 194                 snd_soc_jack_add_pins(&simple_card_mic_jack,
 195                                       ARRAY_SIZE(simple_card_mic_jack_pins),
 196                                       simple_card_mic_jack_pins);
 197                 simple_card_mic_jack_gpio.gpio = priv->gpio_mic_det;
 198                 simple_card_mic_jack_gpio.invert = priv->gpio_mic_det_invert;
 199                 snd_soc_jack_add_gpios(&simple_card_mic_jack, 1,
 200                                        &simple_card_mic_jack_gpio);
 201         }
 202         return 0;
 203 }
 204
 205 static int
 206 asoc_simple_card_sub_parse_of(struct device_node *np,
 207                               struct asoc_simple_dai *dai,
 208                               struct device_node **p_node,
 209                               const char **name,
 210                               int *args_count)
 211 {
 212         struct of_phandle_args args;
 213         struct clk *clk;
 214         u32 val;
 215         int ret;
 216
 217         /*
 218          * Get node via "sound-dai = <&phandle port>"
 219          * it will be used as xxx_of_node on soc_bind_dai_link()
 220          */
 221         ret = of_parse_phandle_with_args(np, "sound-dai",
 222                                          "#sound-dai-cells", 0, &args);
 223         if (ret)
 224                 return ret;
 225
 226         *p_node = args.np;
 227
 228         if (args_count)
 229                 *args_count = args.args_count;
 230
 231         /* Get dai->name */
 232         ret = snd_soc_of_get_dai_name(np, name);
 233         if (ret < 0)
 234                 return ret;
 235
 236         /* Parse TDM slot */
 237         ret = snd_soc_of_parse_tdm_slot(np, &dai->slots, &dai->slot_width);
 238         if (ret)
 239                 return ret;
 240
 241         /*
 242          * Parse dai->sysclk come from "clocks = <&xxx>"
 243          * (if system has common clock)
 244          *  or "system-clock-frequency = <xxx>"
 245          *  or device's module clock.
 246          */
 247         if (of_property_read_bool(np, "clocks")) {
 248                 clk = of_clk_get(np, 0);
 249                 if (IS_ERR(clk)) {
 250                         ret = PTR_ERR(clk);
 251                         return ret;
 252                 }
 253
 254                 dai->sysclk = clk_get_rate(clk);
 255                 dai->clk = clk;
 256         } else if (!of_property_read_u32(np, "system-clock-frequency", &val)) {
 257                 dai->sysclk = val;
 258         } else {
 259                 clk = of_clk_get(args.np, 0);
 260                 if (!IS_ERR(clk))
 261                         dai->sysclk = clk_get_rate(clk);
 262         }
 263
 264         return 0;
 265 }
 266
 267 static int asoc_simple_card_parse_daifmt(struct device_node *node,
 268                                          struct simple_card_data *priv,
 269                                          struct device_node *codec,
 270                                          char *prefix, int idx)
 271 {
 272         struct device *dev = simple_priv_to_dev(priv);
 273         struct device_node *bitclkmaster = NULL;
 274         struct device_node *framemaster = NULL;
 275         struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
 276         struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai;
 277         struct asoc_simple_dai *codec_dai = &dai_props->codec_dai;
 278         unsigned int daifmt;
 279
 280         daifmt = snd_soc_of_parse_daifmt(node, prefix,
 281                                          &bitclkmaster, &framemaster);
 282         daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
 283
 284         if (strlen(prefix) && !bitclkmaster && !framemaster) {
 285                 /*
 286                  * No dai-link level and master setting was not found from
 287                  * sound node level, revert back to legacy DT parsing and
 288                  * take the settings from codec node.
 289                  */
 290                 dev_dbg(dev, "Revert to legacy daifmt parsing\n");
 291
 292                 cpu_dai->fmt = codec_dai->fmt =
 293                         snd_soc_of_parse_daifmt(codec, NULL, NULL, NULL) |
 294                         (daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
 295         } else {
 296                 if (codec == bitclkmaster)
 297                         daifmt |= (codec == framemaster) ?
 298                                 SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
 299                 else
 300                         daifmt |= (codec == framemaster) ?
 301                                 SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
 302
 303                 cpu_dai->fmt    = daifmt;
 304                 codec_dai->fmt  = daifmt;
 305         }
 306
 307         of_node_put(bitclkmaster);
 308         of_node_put(framemaster);
 309
 310         return 0;
 311 }
 312
 313 static int asoc_simple_card_dai_link_of(struct device_node *node,
 314                                         struct simple_card_data *priv,
 315                                         int idx,
 316                                         bool is_top_level_node)
 317 {
 318         struct device *dev = simple_priv_to_dev(priv);
 319         struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
 320         struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
 321         struct device_node *cpu = NULL;
 322         struct device_node *codec = NULL;
 323         char *name;
 324         char prop[128];
 325         char *prefix = "";
 326         int ret, cpu_args;
 327
 328         /* For single DAI link & old style of DT node */
 329         if (is_top_level_node)
 330                 prefix = "simple-audio-card,";
 331
 332         snprintf(prop, sizeof(prop), "%scpu", prefix);
 333         cpu = of_get_child_by_name(node, prop);
 334
 335         snprintf(prop, sizeof(prop), "%scodec", prefix);
 336         codec = of_get_child_by_name(node, prop);
 337
 338         if (!cpu || !codec) {
 339                 ret = -EINVAL;
 340                 dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
 341                 goto dai_link_of_err;
 342         }
 343
 344         ret = asoc_simple_card_parse_daifmt(node, priv,
 345                                             codec, prefix, idx);
 346         if (ret < 0)
 347                 goto dai_link_of_err;
 348
 349         ret = asoc_simple_card_sub_parse_of(cpu, &dai_props->cpu_dai,
 350                                             &dai_link->cpu_of_node,
 351                                             &dai_link->cpu_dai_name,
 352                                             &cpu_args);
 353         if (ret < 0)
 354                 goto dai_link_of_err;
 355
 356         ret = asoc_simple_card_sub_parse_of(codec, &dai_props->codec_dai,
 357                                             &dai_link->codec_of_node,
 358                                             &dai_link->codec_dai_name, NULL);
 359         if (ret < 0)
 360                 goto dai_link_of_err;
 361
 362         if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) {
 363                 ret = -EINVAL;
 364                 goto dai_link_of_err;
 365         }
 366
 367         /* Simple Card assumes platform == cpu */
 368         dai_link->platform_of_node = dai_link->cpu_of_node;
 369
 370         /* DAI link name is created from CPU/CODEC dai name */
 371         name = devm_kzalloc(dev,
 372                             strlen(dai_link->cpu_dai_name)   +
 373                             strlen(dai_link->codec_dai_name) + 2,
 374                             GFP_KERNEL);
 375         sprintf(name, "%s-%s", dai_link->cpu_dai_name,
 376                                 dai_link->codec_dai_name);
 377         dai_link->name = dai_link->stream_name = name;
 378         dai_link->ops = &asoc_simple_card_ops;
 379         dai_link->init = asoc_simple_card_dai_init;
 380
 381         dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
 382         dev_dbg(dev, "\tcpu : %s / %04x / %d\n",
 383                 dai_link->cpu_dai_name,
 384                 dai_props->cpu_dai.fmt,
 385                 dai_props->cpu_dai.sysclk);
 386         dev_dbg(dev, "\tcodec : %s / %04x / %d\n",
 387                 dai_link->codec_dai_name,
 388                 dai_props->codec_dai.fmt,
 389                 dai_props->codec_dai.sysclk);
 390
 391         /*
 392          * In soc_bind_dai_link() will check cpu name after
 393          * of_node matching if dai_link has cpu_dai_name.
 394          * but, it will never match if name was created by
 395          * fmt_single_name() remove cpu_dai_name if cpu_args
 396          * was 0. See:
 397          *      fmt_single_name()
 398          *      fmt_multiple_name()
 399          */
 400         if (!cpu_args)
 401                 dai_link->cpu_dai_name = NULL;
 402
 403 dai_link_of_err:
 404         of_node_put(cpu);
 405         of_node_put(codec);
 406
 407         return ret;
 408 }
 409
 410 static int asoc_simple_card_parse_of(struct device_node *node,
 411                                      struct simple_card_data *priv)
 412 {
 413         struct device *dev = simple_priv_to_dev(priv);
 414         enum of_gpio_flags flags;
 415         u32 val;
 416         int ret;
 417
 418         if (!node)
 419                 return -EINVAL;
 420
 421         /* Parse the card name from DT */
 422         snd_soc_of_parse_card_name(&priv->snd_card, "simple-audio-card,name");
 423
 424         /* The off-codec widgets */
 425         if (of_property_read_bool(node, "simple-audio-card,widgets")) {
 426                 ret = snd_soc_of_parse_audio_simple_widgets(&priv->snd_card,
 427                                         "simple-audio-card,widgets");
 428                 if (ret)
 429                         return ret;
 430         }
 431
 432         /* DAPM routes */
 433         if (of_property_read_bool(node, "simple-audio-card,routing")) {
 434                 ret = snd_soc_of_parse_audio_routing(&priv->snd_card,
 435                                         "simple-audio-card,routing");
 436                 if (ret)
 437                         return ret;
 438         }
 439
 440         /* Factor to mclk, used in hw_params() */
 441         ret = of_property_read_u32(node, "simple-audio-card,mclk-fs", &val);
 442         if (ret == 0)
 443                 priv->mclk_fs = val;
 444
 445         dev_dbg(dev, "New simple-card: %s\n", priv->snd_card.name ?
 446                 priv->snd_card.name : "");
 447
 448         /* Single/Muti DAI link(s) & New style of DT node */
 449         if (of_get_child_by_name(node, "simple-audio-card,dai-link")) {
 450                 struct device_node *np = NULL;
 451                 int i = 0;
 452
 453                 for_each_child_of_node(node, np) {
 454                         dev_dbg(dev, "\tlink %d:\n", i);
 455                         ret = asoc_simple_card_dai_link_of(np, priv,
 456                                                            i, false);
 457                         if (ret < 0) {
 458                                 of_node_put(np);
 459                                 return ret;
 460                         }
 461                         i++;
 462                 }
 463         } else {
 464                 /* For single DAI link & old style of DT node */
 465                 ret = asoc_simple_card_dai_link_of(node, priv, 0, true);
 466                 if (ret < 0)
 467                         return ret;
 468         }
 469
 470         priv->gpio_hp_det = of_get_named_gpio_flags(node,
 471                                 "simple-audio-card,hp-det-gpio", 0, &flags);
 472         priv->gpio_hp_det_invert = !!(flags & OF_GPIO_ACTIVE_LOW);
 473         if (priv->gpio_hp_det == -EPROBE_DEFER)
 474                 return -EPROBE_DEFER;
 475
 476         priv->gpio_mic_det = of_get_named_gpio_flags(node,
 477                                 "simple-audio-card,mic-det-gpio", 0, &flags);
 478         priv->gpio_mic_det_invert = !!(flags & OF_GPIO_ACTIVE_LOW);
 479         if (priv->gpio_mic_det == -EPROBE_DEFER)
 480                 return -EPROBE_DEFER;
 481
 482         if (!priv->snd_card.name)
 483                 priv->snd_card.name = priv->snd_card.dai_link->name;
 484
 485         return 0;
 486 }
 487
 488 /* Decrease the reference count of the device nodes */
 489 static int asoc_simple_card_unref(struct snd_soc_card *card)
 490 {
 491         struct snd_soc_dai_link *dai_link;
 492         int num_links;
 493
 494         for (num_links = 0, dai_link = card->dai_link;
 495              num_links < card->num_links;
 496              num_links++, dai_link++) {
 497                 of_node_put(dai_link->cpu_of_node);
 498                 of_node_put(dai_link->codec_of_node);
 499         }
 500         return 0;
 501 }
 502
 503 static int asoc_simple_card_probe(struct platform_device *pdev)
 504 {
 505         struct simple_card_data *priv;
 506         struct snd_soc_dai_link *dai_link;
 507         struct device_node *np = pdev->dev.of_node;
 508         struct device *dev = &pdev->dev;
 509         int num_links, ret;
 510
 511         /* Get the number of DAI links */
 512         if (np && of_get_child_by_name(np, "simple-audio-card,dai-link"))
 513                 num_links = of_get_child_count(np);
 514         else
 515                 num_links = 1;
 516
 517         /* Allocate the private data and the DAI link array */
 518         priv = devm_kzalloc(dev,
 519                         sizeof(*priv) + sizeof(*dai_link) * num_links,
 520                         GFP_KERNEL);
 521         if (!priv)
 522                 return -ENOMEM;
 523
 524         /* Init snd_soc_card */
 525         priv->snd_card.owner = THIS_MODULE;
 526         priv->snd_card.dev = dev;
 527         dai_link = priv->dai_link;
 528         priv->snd_card.dai_link = dai_link;
 529         priv->snd_card.num_links = num_links;
 530
 531         priv->gpio_hp_det = -ENOENT;
 532         priv->gpio_mic_det = -ENOENT;
 533
 534         /* Get room for the other properties */
 535         priv->dai_props = devm_kzalloc(dev,
 536                         sizeof(*priv->dai_props) * num_links,
 537                         GFP_KERNEL);
 538         if (!priv->dai_props)
 539                 return -ENOMEM;
 540
 541         if (np && of_device_is_available(np)) {
 542
 543                 ret = asoc_simple_card_parse_of(np, priv);
 544                 if (ret < 0) {
 545                         if (ret != -EPROBE_DEFER)
 546                                 dev_err(dev, "parse error %d\n", ret);
 547                         goto err;
 548                 }
 549
 550         } else {
 551                 struct asoc_simple_card_info *cinfo;
 552
 553                 cinfo = dev->platform_data;
 554                 if (!cinfo) {
 555                         dev_err(dev, "no info for asoc-simple-card\n");
 556                         return -EINVAL;
 557                 }
 558
 559                 if (!cinfo->name ||
 560                     !cinfo->codec_dai.name ||
 561                     !cinfo->codec ||
 562                     !cinfo->platform ||
 563                     !cinfo->cpu_dai.name) {
 564                         dev_err(dev, "insufficient asoc_simple_card_info settings\n");
 565                         return -EINVAL;
 566                 }
 567
 568                 priv->snd_card.name     = (cinfo->card) ? cinfo->card : cinfo->name;
 569                 dai_link->name          = cinfo->name;
 570                 dai_link->stream_name   = cinfo->name;
 571                 dai_link->platform_name = cinfo->platform;
 572                 dai_link->codec_name    = cinfo->codec;
 573                 dai_link->cpu_dai_name  = cinfo->cpu_dai.name;
 574                 dai_link->codec_dai_name = cinfo->codec_dai.name;
 575                 dai_link->init          = asoc_simple_card_dai_init;
 576                 memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
 577                                         sizeof(priv->dai_props->cpu_dai));
 578                 memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
 579                                         sizeof(priv->dai_props->codec_dai));
 580
 581                 priv->dai_props->cpu_dai.fmt    |= cinfo->daifmt;
 582                 priv->dai_props->codec_dai.fmt  |= cinfo->daifmt;
 583         }
 584
 585         snd_soc_card_set_drvdata(&priv->snd_card, priv);
 586
 587         ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
 588         if (ret >= 0)
 589                 return ret;
 590
 591 err:
 592         asoc_simple_card_unref(&priv->snd_card);
 593         return ret;
 594 }
 595
 596 static int asoc_simple_card_remove(struct platform_device *pdev)
 597 {
 598         struct snd_soc_card *card = platform_get_drvdata(pdev);
 599         struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
 600
 601         if (gpio_is_valid(priv->gpio_hp_det))
 602                 snd_soc_jack_free_gpios(&simple_card_hp_jack, 1,
 603                                         &simple_card_hp_jack_gpio);
 604         if (gpio_is_valid(priv->gpio_mic_det))
 605                 snd_soc_jack_free_gpios(&simple_card_mic_jack, 1,
 606                                         &simple_card_mic_jack_gpio);
 607
 608         return asoc_simple_card_unref(card);
 609 }
 610
 611 static const struct of_device_id asoc_simple_of_match[] = {
 612         { .compatible = "simple-audio-card", },
 613         {},
 614 };
 615 MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
 616
 617 static struct platform_driver asoc_simple_card = {
 618         .driver = {
 619                 .name = "asoc-simple-card",
 620                 .of_match_table = asoc_simple_of_match,
 621         },
 622         .probe = asoc_simple_card_probe,
 623         .remove = asoc_simple_card_remove,
 624 };
 625
 626 module_platform_driver(asoc_simple_card);
 627
 628 MODULE_ALIAS("platform:asoc-simple-card");
 629 MODULE_LICENSE("GPL");
 630 MODULE_DESCRIPTION("ASoC Simple Sound Card");
 631 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");