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                 unsigned int mclk_fs;
  30         } *dai_props;
  31         unsigned int mclk_fs;
  32         int gpio_hp_det;
  33         int gpio_hp_det_invert;
  34         int gpio_mic_det;
  35         int gpio_mic_det_invert;
  36         struct snd_soc_dai_link dai_link[];     /* dynamically allocated */
  37 };
  38
  39 #define simple_priv_to_dev(priv) ((priv)->snd_card.dev)
  40 #define simple_priv_to_link(priv, i) ((priv)->snd_card.dai_link + i)
  41 #define simple_priv_to_props(priv, i) ((priv)->dai_props + i)
  42
  43 static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
  44 {
  45         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  46         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
  47         struct simple_dai_props *dai_props =
  48                 &priv->dai_props[rtd->num];
  49         int ret;
  50
  51         ret = clk_prepare_enable(dai_props->cpu_dai.clk);
  52         if (ret)
  53                 return ret;
  54
  55         ret = clk_prepare_enable(dai_props->codec_dai.clk);
  56         if (ret)
  57                 clk_disable_unprepare(dai_props->cpu_dai.clk);
  58
  59         return ret;
  60 }
  61
  62 static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
  63 {
  64         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  65         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
  66         struct simple_dai_props *dai_props =
  67                 &priv->dai_props[rtd->num];
  68
  69         clk_disable_unprepare(dai_props->cpu_dai.clk);
  70
  71         clk_disable_unprepare(dai_props->codec_dai.clk);
  72 }
  73
  74 static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream,
  75                                       struct snd_pcm_hw_params *params)
  76 {
  77         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  78         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  79         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  80         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
  81         struct simple_dai_props *dai_props = &priv->dai_props[rtd->num];
  82         unsigned int mclk, mclk_fs = 0;
  83         int ret = 0;
  84
  85         if (priv->mclk_fs)
  86                 mclk_fs = priv->mclk_fs;
  87         else if (dai_props->mclk_fs)
  88                 mclk_fs = dai_props->mclk_fs;
  89
  90         if (mclk_fs) {
  91                 mclk = params_rate(params) * mclk_fs;
  92                 ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
  93                                              SND_SOC_CLOCK_IN);
  94                 if (ret && ret != -ENOTSUPP)
  95                         goto err;
  96
  97                 ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
  98                                              SND_SOC_CLOCK_OUT);
  99                 if (ret && ret != -ENOTSUPP)
 100                         goto err;
 101         }
 102
 103 err:
 104         return ret;
 105 }
 106
 107 static struct snd_soc_ops asoc_simple_card_ops = {
 108         .startup = asoc_simple_card_startup,
 109         .shutdown = asoc_simple_card_shutdown,
 110         .hw_params = asoc_simple_card_hw_params,
 111 };
 112
 113 static struct snd_soc_jack simple_card_hp_jack;
 114 static struct snd_soc_jack_pin simple_card_hp_jack_pins[] = {
 115         {
 116                 .pin = "Headphones",
 117                 .mask = SND_JACK_HEADPHONE,
 118         },
 119 };
 120 static struct snd_soc_jack_gpio simple_card_hp_jack_gpio = {
 121         .name = "Headphone detection",
 122         .report = SND_JACK_HEADPHONE,
 123         .debounce_time = 150,
 124 };
 125
 126 static struct snd_soc_jack simple_card_mic_jack;
 127 static struct snd_soc_jack_pin simple_card_mic_jack_pins[] = {
 128         {
 129                 .pin = "Mic Jack",
 130                 .mask = SND_JACK_MICROPHONE,
 131         },
 132 };
 133 static struct snd_soc_jack_gpio simple_card_mic_jack_gpio = {
 134         .name = "Mic detection",
 135         .report = SND_JACK_MICROPHONE,
 136         .debounce_time = 150,
 137 };
 138
 139 static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
 140                                        struct asoc_simple_dai *set)
 141 {
 142         int ret;
 143
 144         if (set->sysclk) {
 145                 ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0);
 146                 if (ret && ret != -ENOTSUPP) {
 147                         dev_err(dai->dev, "simple-card: set_sysclk error\n");
 148                         goto err;
 149                 }
 150         }
 151
 152         if (set->slots) {
 153                 ret = snd_soc_dai_set_tdm_slot(dai,
 154                                                set->tx_slot_mask,
 155                                                set->rx_slot_mask,
 156                                                 set->slots,
 157                                                 set->slot_width);
 158                 if (ret && ret != -ENOTSUPP) {
 159                         dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
 160                         goto err;
 161                 }
 162         }
 163
 164         ret = 0;
 165
 166 err:
 167         return ret;
 168 }
 169
 170 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
 171 {
 172         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
 173         struct snd_soc_dai *codec = rtd->codec_dai;
 174         struct snd_soc_dai *cpu = rtd->cpu_dai;
 175         struct simple_dai_props *dai_props;
 176         int ret;
 177
 178         dai_props = &priv->dai_props[rtd->num];
 179         ret = __asoc_simple_card_dai_init(codec, &dai_props->codec_dai);
 180         if (ret < 0)
 181                 return ret;
 182
 183         ret = __asoc_simple_card_dai_init(cpu, &dai_props->cpu_dai);
 184         if (ret < 0)
 185                 return ret;
 186
 187         if (gpio_is_valid(priv->gpio_hp_det)) {
 188                 snd_soc_card_jack_new(rtd->card, "Headphones",
 189                                       SND_JACK_HEADPHONE,
 190                                       &simple_card_hp_jack,
 191                                       simple_card_hp_jack_pins,
 192                                       ARRAY_SIZE(simple_card_hp_jack_pins));
 193
 194                 simple_card_hp_jack_gpio.gpio = priv->gpio_hp_det;
 195                 simple_card_hp_jack_gpio.invert = priv->gpio_hp_det_invert;
 196                 snd_soc_jack_add_gpios(&simple_card_hp_jack, 1,
 197                                        &simple_card_hp_jack_gpio);
 198         }
 199
 200         if (gpio_is_valid(priv->gpio_mic_det)) {
 201                 snd_soc_card_jack_new(rtd->card, "Mic Jack",
 202                                       SND_JACK_MICROPHONE,
 203                                       &simple_card_mic_jack,
 204                                       simple_card_mic_jack_pins,
 205                                       ARRAY_SIZE(simple_card_mic_jack_pins));
 206                 simple_card_mic_jack_gpio.gpio = priv->gpio_mic_det;
 207                 simple_card_mic_jack_gpio.invert = priv->gpio_mic_det_invert;
 208                 snd_soc_jack_add_gpios(&simple_card_mic_jack, 1,
 209                                        &simple_card_mic_jack_gpio);
 210         }
 211         return 0;
 212 }
 213
 214 static int
 215 asoc_simple_card_sub_parse_of(struct device_node *np,
 216                               struct asoc_simple_dai *dai,
 217                               struct device_node **p_node,
 218                               const char **name,
 219                               int *args_count)
 220 {
 221         struct of_phandle_args args;
 222         struct clk *clk;
 223         u32 val;
 224         int ret;
 225
 226         /*
 227          * Get node via "sound-dai = <&phandle port>"
 228          * it will be used as xxx_of_node on soc_bind_dai_link()
 229          */
 230         ret = of_parse_phandle_with_args(np, "sound-dai",
 231                                          "#sound-dai-cells", 0, &args);
 232         if (ret)
 233                 return ret;
 234
 235         *p_node = args.np;
 236
 237         if (args_count)
 238                 *args_count = args.args_count;
 239
 240         /* Get dai->name */
 241         ret = snd_soc_of_get_dai_name(np, name);
 242         if (ret < 0)
 243                 return ret;
 244
 245         /* Parse TDM slot */
 246         ret = snd_soc_of_parse_tdm_slot(np, &dai->tx_slot_mask,
 247                                         &dai->rx_slot_mask,
 248                                         &dai->slots, &dai->slot_width);
 249         if (ret)
 250                 return ret;
 251
 252         /*
 253          * Parse dai->sysclk come from "clocks = <&xxx>"
 254          * (if system has common clock)
 255          *  or "system-clock-frequency = <xxx>"
 256          *  or device's module clock.
 257          */
 258         if (of_property_read_bool(np, "clocks")) {
 259                 clk = of_clk_get(np, 0);
 260                 if (IS_ERR(clk)) {
 261                         ret = PTR_ERR(clk);
 262                         return ret;
 263                 }
 264
 265                 dai->sysclk = clk_get_rate(clk);
 266                 dai->clk = clk;
 267         } else if (!of_property_read_u32(np, "system-clock-frequency", &val)) {
 268                 dai->sysclk = val;
 269         } else {
 270                 clk = of_clk_get(args.np, 0);
 271                 if (!IS_ERR(clk))
 272                         dai->sysclk = clk_get_rate(clk);
 273         }
 274
 275         return 0;
 276 }
 277
 278 static int asoc_simple_card_parse_daifmt(struct device_node *node,
 279                                          struct simple_card_data *priv,
 280                                          struct device_node *codec,
 281                                          char *prefix, int idx)
 282 {
 283         struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
 284         struct device *dev = simple_priv_to_dev(priv);
 285         struct device_node *bitclkmaster = NULL;
 286         struct device_node *framemaster = NULL;
 287         unsigned int daifmt;
 288
 289         daifmt = snd_soc_of_parse_daifmt(node, prefix,
 290                                          &bitclkmaster, &framemaster);
 291         daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
 292
 293         if (strlen(prefix) && !bitclkmaster && !framemaster) {
 294                 /*
 295                  * No dai-link level and master setting was not found from
 296                  * sound node level, revert back to legacy DT parsing and
 297                  * take the settings from codec node.
 298                  */
 299                 dev_dbg(dev, "Revert to legacy daifmt parsing\n");
 300
 301                 daifmt = snd_soc_of_parse_daifmt(codec, NULL, NULL, NULL) |
 302                         (daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
 303         } else {
 304                 if (codec == bitclkmaster)
 305                         daifmt |= (codec == framemaster) ?
 306                                 SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
 307                 else
 308                         daifmt |= (codec == framemaster) ?
 309                                 SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
 310         }
 311
 312         dai_link->dai_fmt = daifmt;
 313
 314         of_node_put(bitclkmaster);
 315         of_node_put(framemaster);
 316
 317         return 0;
 318 }
 319
 320 static int asoc_simple_card_dai_link_of(struct device_node *node,
 321                                         struct simple_card_data *priv,
 322                                         int idx,
 323                                         bool is_top_level_node)
 324 {
 325         struct device *dev = simple_priv_to_dev(priv);
 326         struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
 327         struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
 328         struct device_node *cpu = NULL;
 329         struct device_node *plat = NULL;
 330         struct device_node *codec = NULL;
 331         char *name;
 332         char prop[128];
 333         char *prefix = "";
 334         int ret, cpu_args;
 335         u32 val;
 336
 337         /* For single DAI link & old style of DT node */
 338         if (is_top_level_node)
 339                 prefix = "simple-audio-card,";
 340
 341         snprintf(prop, sizeof(prop), "%scpu", prefix);
 342         cpu = of_get_child_by_name(node, prop);
 343
 344         snprintf(prop, sizeof(prop), "%splat", prefix);
 345         plat = of_get_child_by_name(node, prop);
 346
 347         snprintf(prop, sizeof(prop), "%scodec", prefix);
 348         codec = of_get_child_by_name(node, prop);
 349
 350         if (!cpu || !codec) {
 351                 ret = -EINVAL;
 352                 dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
 353                 goto dai_link_of_err;
 354         }
 355
 356         ret = asoc_simple_card_parse_daifmt(node, priv,
 357                                             codec, prefix, idx);
 358         if (ret < 0)
 359                 goto dai_link_of_err;
 360
 361         if (!of_property_read_u32(node, "mclk-fs", &val))
 362                 dai_props->mclk_fs = val;
 363
 364         ret = asoc_simple_card_sub_parse_of(cpu, &dai_props->cpu_dai,
 365                                             &dai_link->cpu_of_node,
 366                                             &dai_link->cpu_dai_name,
 367                                             &cpu_args);
 368         if (ret < 0)
 369                 goto dai_link_of_err;
 370
 371         ret = asoc_simple_card_sub_parse_of(codec, &dai_props->codec_dai,
 372                                             &dai_link->codec_of_node,
 373                                             &dai_link->codec_dai_name, NULL);
 374         if (ret < 0)
 375                 goto dai_link_of_err;
 376
 377         if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) {
 378                 ret = -EINVAL;
 379                 goto dai_link_of_err;
 380         }
 381
 382         if (plat) {
 383                 struct of_phandle_args args;
 384
 385                 ret = of_parse_phandle_with_args(plat, "sound-dai",
 386                                                  "#sound-dai-cells", 0, &args);
 387                 dai_link->platform_of_node = args.np;
 388         } else {
 389                 /* Assumes platform == cpu */
 390                 dai_link->platform_of_node = dai_link->cpu_of_node;
 391         }
 392
 393         /* DAI link name is created from CPU/CODEC dai name */
 394         name = devm_kzalloc(dev,
 395                             strlen(dai_link->cpu_dai_name)   +
 396                             strlen(dai_link->codec_dai_name) + 2,
 397                             GFP_KERNEL);
 398         if (!name) {
 399                 ret = -ENOMEM;
 400                 goto dai_link_of_err;
 401         }
 402
 403         sprintf(name, "%s-%s", dai_link->cpu_dai_name,
 404                                 dai_link->codec_dai_name);
 405         dai_link->name = dai_link->stream_name = name;
 406         dai_link->ops = &asoc_simple_card_ops;
 407         dai_link->init = asoc_simple_card_dai_init;
 408
 409         dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
 410         dev_dbg(dev, "\tformat : %04x\n", dai_link->dai_fmt);
 411         dev_dbg(dev, "\tcpu : %s / %d\n",
 412                 dai_link->cpu_dai_name,
 413                 dai_props->cpu_dai.sysclk);
 414         dev_dbg(dev, "\tcodec : %s / %d\n",
 415                 dai_link->codec_dai_name,
 416                 dai_props->codec_dai.sysclk);
 417
 418         /*
 419          * In soc_bind_dai_link() will check cpu name after
 420          * of_node matching if dai_link has cpu_dai_name.
 421          * but, it will never match if name was created by
 422          * fmt_single_name() remove cpu_dai_name if cpu_args
 423          * was 0. See:
 424          *      fmt_single_name()
 425          *      fmt_multiple_name()
 426          */
 427         if (!cpu_args)
 428                 dai_link->cpu_dai_name = NULL;
 429
 430 dai_link_of_err:
 431         of_node_put(cpu);
 432         of_node_put(codec);
 433
 434         return ret;
 435 }
 436
 437 static int asoc_simple_card_parse_of(struct device_node *node,
 438                                      struct simple_card_data *priv)
 439 {
 440         struct device *dev = simple_priv_to_dev(priv);
 441         enum of_gpio_flags flags;
 442         u32 val;
 443         int ret;
 444
 445         if (!node)
 446                 return -EINVAL;
 447
 448         /* Parse the card name from DT */
 449         snd_soc_of_parse_card_name(&priv->snd_card, "simple-audio-card,name");
 450
 451         /* The off-codec widgets */
 452         if (of_property_read_bool(node, "simple-audio-card,widgets")) {
 453                 ret = snd_soc_of_parse_audio_simple_widgets(&priv->snd_card,
 454                                         "simple-audio-card,widgets");
 455                 if (ret)
 456                         return ret;
 457         }
 458
 459         /* DAPM routes */
 460         if (of_property_read_bool(node, "simple-audio-card,routing")) {
 461                 ret = snd_soc_of_parse_audio_routing(&priv->snd_card,
 462                                         "simple-audio-card,routing");
 463                 if (ret)
 464                         return ret;
 465         }
 466
 467         /* Factor to mclk, used in hw_params() */
 468         ret = of_property_read_u32(node, "simple-audio-card,mclk-fs", &val);
 469         if (ret == 0)
 470                 priv->mclk_fs = val;
 471
 472         dev_dbg(dev, "New simple-card: %s\n", priv->snd_card.name ?
 473                 priv->snd_card.name : "");
 474
 475         /* Single/Muti DAI link(s) & New style of DT node */
 476         if (of_get_child_by_name(node, "simple-audio-card,dai-link")) {
 477                 struct device_node *np = NULL;
 478                 int i = 0;
 479
 480                 for_each_child_of_node(node, np) {
 481                         dev_dbg(dev, "\tlink %d:\n", i);
 482                         ret = asoc_simple_card_dai_link_of(np, priv,
 483                                                            i, false);
 484                         if (ret < 0) {
 485                                 of_node_put(np);
 486                                 return ret;
 487                         }
 488                         i++;
 489                 }
 490         } else {
 491                 /* For single DAI link & old style of DT node */
 492                 ret = asoc_simple_card_dai_link_of(node, priv, 0, true);
 493                 if (ret < 0)
 494                         return ret;
 495         }
 496
 497         priv->gpio_hp_det = of_get_named_gpio_flags(node,
 498                                 "simple-audio-card,hp-det-gpio", 0, &flags);
 499         priv->gpio_hp_det_invert = !!(flags & OF_GPIO_ACTIVE_LOW);
 500         if (priv->gpio_hp_det == -EPROBE_DEFER)
 501                 return -EPROBE_DEFER;
 502
 503         priv->gpio_mic_det = of_get_named_gpio_flags(node,
 504                                 "simple-audio-card,mic-det-gpio", 0, &flags);
 505         priv->gpio_mic_det_invert = !!(flags & OF_GPIO_ACTIVE_LOW);
 506         if (priv->gpio_mic_det == -EPROBE_DEFER)
 507                 return -EPROBE_DEFER;
 508
 509         if (!priv->snd_card.name)
 510                 priv->snd_card.name = priv->snd_card.dai_link->name;
 511
 512         return 0;
 513 }
 514
 515 /* Decrease the reference count of the device nodes */
 516 static int asoc_simple_card_unref(struct snd_soc_card *card)
 517 {
 518         struct snd_soc_dai_link *dai_link;
 519         int num_links;
 520
 521         for (num_links = 0, dai_link = card->dai_link;
 522              num_links < card->num_links;
 523              num_links++, dai_link++) {
 524                 of_node_put(dai_link->cpu_of_node);
 525                 of_node_put(dai_link->codec_of_node);
 526         }
 527         return 0;
 528 }
 529
 530 static int asoc_simple_card_probe(struct platform_device *pdev)
 531 {
 532         struct simple_card_data *priv;
 533         struct snd_soc_dai_link *dai_link;
 534         struct device_node *np = pdev->dev.of_node;
 535         struct device *dev = &pdev->dev;
 536         int num_links, ret;
 537
 538         /* Get the number of DAI links */
 539         if (np && of_get_child_by_name(np, "simple-audio-card,dai-link"))
 540                 num_links = of_get_child_count(np);
 541         else
 542                 num_links = 1;
 543
 544         /* Allocate the private data and the DAI link array */
 545         priv = devm_kzalloc(dev,
 546                         sizeof(*priv) + sizeof(*dai_link) * num_links,
 547                         GFP_KERNEL);
 548         if (!priv)
 549                 return -ENOMEM;
 550
 551         /* Init snd_soc_card */
 552         priv->snd_card.owner = THIS_MODULE;
 553         priv->snd_card.dev = dev;
 554         dai_link = priv->dai_link;
 555         priv->snd_card.dai_link = dai_link;
 556         priv->snd_card.num_links = num_links;
 557
 558         priv->gpio_hp_det = -ENOENT;
 559         priv->gpio_mic_det = -ENOENT;
 560
 561         /* Get room for the other properties */
 562         priv->dai_props = devm_kzalloc(dev,
 563                         sizeof(*priv->dai_props) * num_links,
 564                         GFP_KERNEL);
 565         if (!priv->dai_props)
 566                 return -ENOMEM;
 567
 568         if (np && of_device_is_available(np)) {
 569
 570                 ret = asoc_simple_card_parse_of(np, priv);
 571                 if (ret < 0) {
 572                         if (ret != -EPROBE_DEFER)
 573                                 dev_err(dev, "parse error %d\n", ret);
 574                         goto err;
 575                 }
 576
 577         } else {
 578                 struct asoc_simple_card_info *cinfo;
 579
 580                 cinfo = dev->platform_data;
 581                 if (!cinfo) {
 582                         dev_err(dev, "no info for asoc-simple-card\n");
 583                         return -EINVAL;
 584                 }
 585
 586                 if (!cinfo->name ||
 587                     !cinfo->codec_dai.name ||
 588                     !cinfo->codec ||
 589                     !cinfo->platform ||
 590                     !cinfo->cpu_dai.name) {
 591                         dev_err(dev, "insufficient asoc_simple_card_info settings\n");
 592                         return -EINVAL;
 593                 }
 594
 595                 priv->snd_card.name     = (cinfo->card) ? cinfo->card : cinfo->name;
 596                 dai_link->name          = cinfo->name;
 597                 dai_link->stream_name   = cinfo->name;
 598                 dai_link->platform_name = cinfo->platform;
 599                 dai_link->codec_name    = cinfo->codec;
 600                 dai_link->cpu_dai_name  = cinfo->cpu_dai.name;
 601                 dai_link->codec_dai_name = cinfo->codec_dai.name;
 602                 dai_link->dai_fmt       = cinfo->daifmt;
 603                 dai_link->init          = asoc_simple_card_dai_init;
 604                 memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
 605                                         sizeof(priv->dai_props->cpu_dai));
 606                 memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
 607                                         sizeof(priv->dai_props->codec_dai));
 608
 609         }
 610
 611         snd_soc_card_set_drvdata(&priv->snd_card, priv);
 612
 613         ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
 614         if (ret >= 0)
 615                 return ret;
 616
 617 err:
 618         asoc_simple_card_unref(&priv->snd_card);
 619         return ret;
 620 }
 621
 622 static int asoc_simple_card_remove(struct platform_device *pdev)
 623 {
 624         struct snd_soc_card *card = platform_get_drvdata(pdev);
 625         struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
 626
 627         if (gpio_is_valid(priv->gpio_hp_det))
 628                 snd_soc_jack_free_gpios(&simple_card_hp_jack, 1,
 629                                         &simple_card_hp_jack_gpio);
 630         if (gpio_is_valid(priv->gpio_mic_det))
 631                 snd_soc_jack_free_gpios(&simple_card_mic_jack, 1,
 632                                         &simple_card_mic_jack_gpio);
 633
 634         return asoc_simple_card_unref(card);
 635 }
 636
 637 static const struct of_device_id asoc_simple_of_match[] = {
 638         { .compatible = "simple-audio-card", },
 639         {},
 640 };
 641 MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
 642
 643 static struct platform_driver asoc_simple_card = {
 644         .driver = {
 645                 .name = "asoc-simple-card",
 646                 .of_match_table = asoc_simple_of_match,
 647         },
 648         .probe = asoc_simple_card_probe,
 649         .remove = asoc_simple_card_remove,
 650 };
 651
 652 module_platform_driver(asoc_simple_card);
 653
 654 MODULE_ALIAS("platform:asoc-simple-card");
 655 MODULE_LICENSE("GPL");
 656 MODULE_DESCRIPTION("ASoC Simple Sound Card");
 657 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");