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