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, 0, 0,
 155                                                 set->slots,
 156                                                 set->slot_width);
 157                 if (ret && ret != -ENOTSUPP) {
 158                         dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
 159                         goto err;
 160                 }
 161         }
 162
 163         ret = 0;
 164
 165 err:
 166         return ret;
 167 }
 168
 169 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
 170 {
 171         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
 172         struct snd_soc_dai *codec = rtd->codec_dai;
 173         struct snd_soc_dai *cpu = rtd->cpu_dai;
 174         struct simple_dai_props *dai_props;
 175         int num, ret;
 176
 177         num = rtd - rtd->card->rtd;
 178         dai_props = &priv->dai_props[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->slots, &dai->slot_width);
 247         if (ret)
 248                 return ret;
 249
 250         /*
 251          * Parse dai->sysclk come from "clocks = <&xxx>"
 252          * (if system has common clock)
 253          *  or "system-clock-frequency = <xxx>"
 254          *  or device's module clock.
 255          */
 256         if (of_property_read_bool(np, "clocks")) {
 257                 clk = of_clk_get(np, 0);
 258                 if (IS_ERR(clk)) {
 259                         ret = PTR_ERR(clk);
 260                         return ret;
 261                 }
 262
 263                 dai->sysclk = clk_get_rate(clk);
 264                 dai->clk = clk;
 265         } else if (!of_property_read_u32(np, "system-clock-frequency", &val)) {
 266                 dai->sysclk = val;
 267         } else {
 268                 clk = of_clk_get(args.np, 0);
 269                 if (!IS_ERR(clk))
 270                         dai->sysclk = clk_get_rate(clk);
 271         }
 272
 273         return 0;
 274 }
 275
 276 static int asoc_simple_card_parse_daifmt(struct device_node *node,
 277                                          struct simple_card_data *priv,
 278                                          struct device_node *codec,
 279                                          char *prefix, int idx)
 280 {
 281         struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
 282         struct device *dev = simple_priv_to_dev(priv);
 283         struct device_node *bitclkmaster = NULL;
 284         struct device_node *framemaster = NULL;
 285         unsigned int daifmt;
 286
 287         daifmt = snd_soc_of_parse_daifmt(node, prefix,
 288                                          &bitclkmaster, &framemaster);
 289         daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
 290
 291         if (strlen(prefix) && !bitclkmaster && !framemaster) {
 292                 /*
 293                  * No dai-link level and master setting was not found from
 294                  * sound node level, revert back to legacy DT parsing and
 295                  * take the settings from codec node.
 296                  */
 297                 dev_dbg(dev, "Revert to legacy daifmt parsing\n");
 298
 299                 daifmt = snd_soc_of_parse_daifmt(codec, NULL, NULL, NULL) |
 300                         (daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
 301         } else {
 302                 if (codec == bitclkmaster)
 303                         daifmt |= (codec == framemaster) ?
 304                                 SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
 305                 else
 306                         daifmt |= (codec == framemaster) ?
 307                                 SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
 308         }
 309
 310         dai_link->dai_fmt = daifmt;
 311
 312         of_node_put(bitclkmaster);
 313         of_node_put(framemaster);
 314
 315         return 0;
 316 }
 317
 318 static int asoc_simple_card_dai_link_of(struct device_node *node,
 319                                         struct simple_card_data *priv,
 320                                         int idx,
 321                                         bool is_top_level_node)
 322 {
 323         struct device *dev = simple_priv_to_dev(priv);
 324         struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
 325         struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
 326         struct device_node *cpu = NULL;
 327         struct device_node *plat = NULL;
 328         struct device_node *codec = NULL;
 329         char *name;
 330         char prop[128];
 331         char *prefix = "";
 332         int ret, cpu_args;
 333         u32 val;
 334
 335         /* For single DAI link & old style of DT node */
 336         if (is_top_level_node)
 337                 prefix = "simple-audio-card,";
 338
 339         snprintf(prop, sizeof(prop), "%scpu", prefix);
 340         cpu = of_get_child_by_name(node, prop);
 341
 342         snprintf(prop, sizeof(prop), "%splat", prefix);
 343         plat = of_get_child_by_name(node, prop);
 344
 345         snprintf(prop, sizeof(prop), "%scodec", prefix);
 346         codec = of_get_child_by_name(node, prop);
 347
 348         if (!cpu || !codec) {
 349                 ret = -EINVAL;
 350                 dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
 351                 goto dai_link_of_err;
 352         }
 353
 354         ret = asoc_simple_card_parse_daifmt(node, priv,
 355                                             codec, prefix, idx);
 356         if (ret < 0)
 357                 goto dai_link_of_err;
 358
 359         if (!of_property_read_u32(node, "mclk-fs", &val))
 360                 dai_props->mclk_fs = val;
 361
 362         ret = asoc_simple_card_sub_parse_of(cpu, &dai_props->cpu_dai,
 363                                             &dai_link->cpu_of_node,
 364                                             &dai_link->cpu_dai_name,
 365                                             &cpu_args);
 366         if (ret < 0)
 367                 goto dai_link_of_err;
 368
 369         ret = asoc_simple_card_sub_parse_of(codec, &dai_props->codec_dai,
 370                                             &dai_link->codec_of_node,
 371                                             &dai_link->codec_dai_name, NULL);
 372         if (ret < 0)
 373                 goto dai_link_of_err;
 374
 375         if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) {
 376                 ret = -EINVAL;
 377                 goto dai_link_of_err;
 378         }
 379
 380         if (plat) {
 381                 struct of_phandle_args args;
 382
 383                 ret = of_parse_phandle_with_args(plat, "sound-dai",
 384                                                  "#sound-dai-cells", 0, &args);
 385                 dai_link->platform_of_node = args.np;
 386         } else {
 387                 /* Assumes platform == cpu */
 388                 dai_link->platform_of_node = dai_link->cpu_of_node;
 389         }
 390
 391         /* DAI link name is created from CPU/CODEC dai name */
 392         name = devm_kzalloc(dev,
 393                             strlen(dai_link->cpu_dai_name)   +
 394                             strlen(dai_link->codec_dai_name) + 2,
 395                             GFP_KERNEL);
 396         if (!name) {
 397                 ret = -ENOMEM;
 398                 goto dai_link_of_err;
 399         }
 400
 401         sprintf(name, "%s-%s", dai_link->cpu_dai_name,
 402                                 dai_link->codec_dai_name);
 403         dai_link->name = dai_link->stream_name = name;
 404         dai_link->ops = &asoc_simple_card_ops;
 405         dai_link->init = asoc_simple_card_dai_init;
 406
 407         dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
 408         dev_dbg(dev, "\tformat : %04x\n", dai_link->dai_fmt);
 409         dev_dbg(dev, "\tcpu : %s / %d\n",
 410                 dai_link->cpu_dai_name,
 411                 dai_props->cpu_dai.sysclk);
 412         dev_dbg(dev, "\tcodec : %s / %d\n",
 413                 dai_link->codec_dai_name,
 414                 dai_props->codec_dai.sysclk);
 415
 416         /*
 417          * In soc_bind_dai_link() will check cpu name after
 418          * of_node matching if dai_link has cpu_dai_name.
 419          * but, it will never match if name was created by
 420          * fmt_single_name() remove cpu_dai_name if cpu_args
 421          * was 0. See:
 422          *      fmt_single_name()
 423          *      fmt_multiple_name()
 424          */
 425         if (!cpu_args)
 426                 dai_link->cpu_dai_name = NULL;
 427
 428 dai_link_of_err:
 429         of_node_put(cpu);
 430         of_node_put(codec);
 431
 432         return ret;
 433 }
 434
 435 static int asoc_simple_card_parse_of(struct device_node *node,
 436                                      struct simple_card_data *priv)
 437 {
 438         struct device *dev = simple_priv_to_dev(priv);
 439         enum of_gpio_flags flags;
 440         u32 val;
 441         int ret;
 442
 443         if (!node)
 444                 return -EINVAL;
 445
 446         /* Parse the card name from DT */
 447         snd_soc_of_parse_card_name(&priv->snd_card, "simple-audio-card,name");
 448
 449         /* The off-codec widgets */
 450         if (of_property_read_bool(node, "simple-audio-card,widgets")) {
 451                 ret = snd_soc_of_parse_audio_simple_widgets(&priv->snd_card,
 452                                         "simple-audio-card,widgets");
 453                 if (ret)
 454                         return ret;
 455         }
 456
 457         /* DAPM routes */
 458         if (of_property_read_bool(node, "simple-audio-card,routing")) {
 459                 ret = snd_soc_of_parse_audio_routing(&priv->snd_card,
 460                                         "simple-audio-card,routing");
 461                 if (ret)
 462                         return ret;
 463         }
 464
 465         /* Factor to mclk, used in hw_params() */
 466         ret = of_property_read_u32(node, "simple-audio-card,mclk-fs", &val);
 467         if (ret == 0)
 468                 priv->mclk_fs = val;
 469
 470         dev_dbg(dev, "New simple-card: %s\n", priv->snd_card.name ?
 471                 priv->snd_card.name : "");
 472
 473         /* Single/Muti DAI link(s) & New style of DT node */
 474         if (of_get_child_by_name(node, "simple-audio-card,dai-link")) {
 475                 struct device_node *np = NULL;
 476                 int i = 0;
 477
 478                 for_each_child_of_node(node, np) {
 479                         dev_dbg(dev, "\tlink %d:\n", i);
 480                         ret = asoc_simple_card_dai_link_of(np, priv,
 481                                                            i, false);
 482                         if (ret < 0) {
 483                                 of_node_put(np);
 484                                 return ret;
 485                         }
 486                         i++;
 487                 }
 488         } else {
 489                 /* For single DAI link & old style of DT node */
 490                 ret = asoc_simple_card_dai_link_of(node, priv, 0, true);
 491                 if (ret < 0)
 492                         return ret;
 493         }
 494
 495         priv->gpio_hp_det = of_get_named_gpio_flags(node,
 496                                 "simple-audio-card,hp-det-gpio", 0, &flags);
 497         priv->gpio_hp_det_invert = !!(flags & OF_GPIO_ACTIVE_LOW);
 498         if (priv->gpio_hp_det == -EPROBE_DEFER)
 499                 return -EPROBE_DEFER;
 500
 501         priv->gpio_mic_det = of_get_named_gpio_flags(node,
 502                                 "simple-audio-card,mic-det-gpio", 0, &flags);
 503         priv->gpio_mic_det_invert = !!(flags & OF_GPIO_ACTIVE_LOW);
 504         if (priv->gpio_mic_det == -EPROBE_DEFER)
 505                 return -EPROBE_DEFER;
 506
 507         if (!priv->snd_card.name)
 508                 priv->snd_card.name = priv->snd_card.dai_link->name;
 509
 510         return 0;
 511 }
 512
 513 /* Decrease the reference count of the device nodes */
 514 static int asoc_simple_card_unref(struct snd_soc_card *card)
 515 {
 516         struct snd_soc_dai_link *dai_link;
 517         int num_links;
 518
 519         for (num_links = 0, dai_link = card->dai_link;
 520              num_links < card->num_links;
 521              num_links++, dai_link++) {
 522                 of_node_put(dai_link->cpu_of_node);
 523                 of_node_put(dai_link->codec_of_node);
 524         }
 525         return 0;
 526 }
 527
 528 static int asoc_simple_card_probe(struct platform_device *pdev)
 529 {
 530         struct simple_card_data *priv;
 531         struct snd_soc_dai_link *dai_link;
 532         struct device_node *np = pdev->dev.of_node;
 533         struct device *dev = &pdev->dev;
 534         int num_links, ret;
 535
 536         /* Get the number of DAI links */
 537         if (np && of_get_child_by_name(np, "simple-audio-card,dai-link"))
 538                 num_links = of_get_child_count(np);
 539         else
 540                 num_links = 1;
 541
 542         /* Allocate the private data and the DAI link array */
 543         priv = devm_kzalloc(dev,
 544                         sizeof(*priv) + sizeof(*dai_link) * num_links,
 545                         GFP_KERNEL);
 546         if (!priv)
 547                 return -ENOMEM;
 548
 549         /* Init snd_soc_card */
 550         priv->snd_card.owner = THIS_MODULE;
 551         priv->snd_card.dev = dev;
 552         dai_link = priv->dai_link;
 553         priv->snd_card.dai_link = dai_link;
 554         priv->snd_card.num_links = num_links;
 555
 556         priv->gpio_hp_det = -ENOENT;
 557         priv->gpio_mic_det = -ENOENT;
 558
 559         /* Get room for the other properties */
 560         priv->dai_props = devm_kzalloc(dev,
 561                         sizeof(*priv->dai_props) * num_links,
 562                         GFP_KERNEL);
 563         if (!priv->dai_props)
 564                 return -ENOMEM;
 565
 566         if (np && of_device_is_available(np)) {
 567
 568                 ret = asoc_simple_card_parse_of(np, priv);
 569                 if (ret < 0) {
 570                         if (ret != -EPROBE_DEFER)
 571                                 dev_err(dev, "parse error %d\n", ret);
 572                         goto err;
 573                 }
 574
 575         } else {
 576                 struct asoc_simple_card_info *cinfo;
 577
 578                 cinfo = dev->platform_data;
 579                 if (!cinfo) {
 580                         dev_err(dev, "no info for asoc-simple-card\n");
 581                         return -EINVAL;
 582                 }
 583
 584                 if (!cinfo->name ||
 585                     !cinfo->codec_dai.name ||
 586                     !cinfo->codec ||
 587                     !cinfo->platform ||
 588                     !cinfo->cpu_dai.name) {
 589                         dev_err(dev, "insufficient asoc_simple_card_info settings\n");
 590                         return -EINVAL;
 591                 }
 592
 593                 priv->snd_card.name     = (cinfo->card) ? cinfo->card : cinfo->name;
 594                 dai_link->name          = cinfo->name;
 595                 dai_link->stream_name   = cinfo->name;
 596                 dai_link->platform_name = cinfo->platform;
 597                 dai_link->codec_name    = cinfo->codec;
 598                 dai_link->cpu_dai_name  = cinfo->cpu_dai.name;
 599                 dai_link->codec_dai_name = cinfo->codec_dai.name;
 600                 dai_link->dai_fmt       = cinfo->daifmt;
 601                 dai_link->init          = asoc_simple_card_dai_init;
 602                 memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
 603                                         sizeof(priv->dai_props->cpu_dai));
 604                 memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
 605                                         sizeof(priv->dai_props->codec_dai));
 606
 607         }
 608
 609         snd_soc_card_set_drvdata(&priv->snd_card, priv);
 610
 611         ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
 612         if (ret >= 0)
 613                 return ret;
 614
 615 err:
 616         asoc_simple_card_unref(&priv->snd_card);
 617         return ret;
 618 }
 619
 620 static int asoc_simple_card_remove(struct platform_device *pdev)
 621 {
 622         struct snd_soc_card *card = platform_get_drvdata(pdev);
 623         struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
 624
 625         if (gpio_is_valid(priv->gpio_hp_det))
 626                 snd_soc_jack_free_gpios(&simple_card_hp_jack, 1,
 627                                         &simple_card_hp_jack_gpio);
 628         if (gpio_is_valid(priv->gpio_mic_det))
 629                 snd_soc_jack_free_gpios(&simple_card_mic_jack, 1,
 630                                         &simple_card_mic_jack_gpio);
 631
 632         return asoc_simple_card_unref(card);
 633 }
 634
 635 static const struct of_device_id asoc_simple_of_match[] = {
 636         { .compatible = "simple-audio-card", },
 637         {},
 638 };
 639 MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
 640
 641 static struct platform_driver asoc_simple_card = {
 642         .driver = {
 643                 .name = "asoc-simple-card",
 644                 .of_match_table = asoc_simple_of_match,
 645         },
 646         .probe = asoc_simple_card_probe,
 647         .remove = asoc_simple_card_remove,
 648 };
 649
 650 module_platform_driver(asoc_simple_card);
 651
 652 MODULE_ALIAS("platform:asoc-simple-card");
 653 MODULE_LICENSE("GPL");
 654 MODULE_DESCRIPTION("ASoC Simple Sound Card");
 655 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");