1 files changed, 758 insertions, 0 deletions

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
new file mode 100644
index 000000000..a8bc4e458
--- /dev/null
+++ b/sound/soc/generic/simple-card.c
@@ -0,0 +1,758 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// ASoC simple sound card support
+//
+// Copyright (C) 2012 Renesas Solutions Corp.
+// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/string.h>
+#include <sound/simple_card.h>
+#include <sound/soc-dai.h>
+#include <sound/soc.h>
+
+#define DPCM_SELECTABLE 1
+
+#define DAI	"sound-dai"
+#define CELL	"#sound-dai-cells"
+#define PREFIX	"simple-audio-card,"
+
+static const struct snd_soc_ops simple_ops = {
+	.startup	= asoc_simple_startup,
+	.shutdown	= asoc_simple_shutdown,
+	.hw_params	= asoc_simple_hw_params,
+};
+
+static int asoc_simple_parse_platform(struct device_node *node,
+				      struct snd_soc_dai_link_component *dlc)
+{
+	struct of_phandle_args args;
+	int ret;
+
+	if (!node)
+		return 0;
+
+	/*
+	 * Get node via "sound-dai = <&phandle port>"
+	 * it will be used as xxx_of_node on soc_bind_dai_link()
+	 */
+	ret = of_parse_phandle_with_args(node, DAI, CELL, 0, &args);
+	if (ret)
+		return ret;
+
+	/* dai_name is not required and may not exist for plat component */
+
+	dlc->of_node = args.np;
+
+	return 0;
+}
+
+static int asoc_simple_parse_dai(struct device_node *node,
+				 struct snd_soc_dai_link_component *dlc,
+				 int *is_single_link)
+{
+	struct of_phandle_args args;
+	int ret;
+
+	if (!node)
+		return 0;
+
+	/*
+	 * Get node via "sound-dai = <&phandle port>"
+	 * it will be used as xxx_of_node on soc_bind_dai_link()
+	 */
+	ret = of_parse_phandle_with_args(node, DAI, CELL, 0, &args);
+	if (ret)
+		return ret;
+
+	/*
+	 * FIXME
+	 *
+	 * Here, dlc->dai_name is pointer to CPU/Codec DAI name.
+	 * If user unbinded CPU or Codec driver, but not for Sound Card,
+	 * dlc->dai_name is keeping unbinded CPU or Codec
+	 * driver's pointer.
+	 *
+	 * If user re-bind CPU or Codec driver again, ALSA SoC will try
+	 * to rebind Card via snd_soc_try_rebind_card(), but because of
+	 * above reason, it might can't bind Sound Card.
+	 * Because Sound Card is pointing to released dai_name pointer.
+	 *
+	 * To avoid this rebind Card issue,
+	 * 1) It needs to alloc memory to keep dai_name eventhough
+	 *    CPU or Codec driver was unbinded, or
+	 * 2) user need to rebind Sound Card everytime
+	 *    if he unbinded CPU or Codec.
+	 */
+	ret = snd_soc_of_get_dai_name(node, &dlc->dai_name);
+	if (ret < 0)
+		return ret;
+
+	dlc->of_node = args.np;
+
+	if (is_single_link)
+		*is_single_link = !args.args_count;
+
+	return 0;
+}
+
+static void simple_parse_convert(struct device *dev,
+				 struct device_node *np,
+				 struct asoc_simple_data *adata)
+{
+	struct device_node *top = dev->of_node;
+	struct device_node *node = of_get_parent(np);
+
+	asoc_simple_parse_convert(top,  PREFIX, adata);
+	asoc_simple_parse_convert(node, PREFIX, adata);
+	asoc_simple_parse_convert(node, NULL,   adata);
+	asoc_simple_parse_convert(np,   NULL,   adata);
+
+	of_node_put(node);
+}
+
+static void simple_parse_mclk_fs(struct device_node *top,
+				 struct device_node *np,
+				 struct simple_dai_props *props,
+				 char *prefix)
+{
+	struct device_node *node = of_get_parent(np);
+	char prop[128];
+
+	snprintf(prop, sizeof(prop), "%smclk-fs", PREFIX);
+	of_property_read_u32(top,	prop, &props->mclk_fs);
+
+	snprintf(prop, sizeof(prop), "%smclk-fs", prefix);
+	of_property_read_u32(node,	prop, &props->mclk_fs);
+	of_property_read_u32(np,	prop, &props->mclk_fs);
+
+	of_node_put(node);
+}
+
+static int simple_parse_node(struct asoc_simple_priv *priv,
+			     struct device_node *np,
+			     struct link_info *li,
+			     char *prefix,
+			     int *cpu)
+{
+	struct device *dev = simple_priv_to_dev(priv);
+	struct device_node *top = dev->of_node;
+	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
+	struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
+	struct snd_soc_dai_link_component *dlc;
+	struct asoc_simple_dai *dai;
+	int ret;
+
+	if (cpu) {
+		dlc = asoc_link_to_cpu(dai_link, 0);
+		dai = simple_props_to_dai_cpu(dai_props, 0);
+	} else {
+		dlc = asoc_link_to_codec(dai_link, 0);
+		dai = simple_props_to_dai_codec(dai_props, 0);
+	}
+
+	simple_parse_mclk_fs(top, np, dai_props, prefix);
+
+	ret = asoc_simple_parse_dai(np, dlc, cpu);
+	if (ret)
+		return ret;
+
+	ret = asoc_simple_parse_clk(dev, np, dai, dlc);
+	if (ret)
+		return ret;
+
+	ret = asoc_simple_parse_tdm(np, dai);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int simple_link_init(struct asoc_simple_priv *priv,
+			    struct device_node *node,
+			    struct device_node *codec,
+			    struct link_info *li,
+			    char *prefix, char *name)
+{
+	struct device *dev = simple_priv_to_dev(priv);
+	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
+	int ret;
+
+	ret = asoc_simple_parse_daifmt(dev, node, codec,
+				       prefix, &dai_link->dai_fmt);
+	if (ret < 0)
+		return 0;
+
+	dai_link->init			= asoc_simple_dai_init;
+	dai_link->ops			= &simple_ops;
+
+	return asoc_simple_set_dailink_name(dev, dai_link, name);
+}
+
+static int simple_dai_link_of_dpcm(struct asoc_simple_priv *priv,
+				   struct device_node *np,
+				   struct device_node *codec,
+				   struct link_info *li,
+				   bool is_top)
+{
+	struct device *dev = simple_priv_to_dev(priv);
+	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
+	struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
+	struct device_node *top = dev->of_node;
+	struct device_node *node = of_get_parent(np);
+	char *prefix = "";
+	char dai_name[64];
+	int ret;
+
+	dev_dbg(dev, "link_of DPCM (%pOF)\n", np);
+
+	/* For single DAI link & old style of DT node */
+	if (is_top)
+		prefix = PREFIX;
+
+	if (li->cpu) {
+		struct snd_soc_dai_link_component *cpus = asoc_link_to_cpu(dai_link, 0);
+		struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, 0);
+		int is_single_links = 0;
+
+		/* Codec is dummy */
+
+		/* FE settings */
+		dai_link->dynamic		= 1;
+		dai_link->dpcm_merged_format	= 1;
+
+		ret = simple_parse_node(priv, np, li, prefix, &is_single_links);
+		if (ret < 0)
+			goto out_put_node;
+
+		snprintf(dai_name, sizeof(dai_name), "fe.%s", cpus->dai_name);
+
+		asoc_simple_canonicalize_cpu(cpus, is_single_links);
+		asoc_simple_canonicalize_platform(platforms, cpus);
+	} else {
+		struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, 0);
+		struct snd_soc_codec_conf *cconf;
+
+		/* CPU is dummy */
+
+		/* BE settings */
+		dai_link->no_pcm		= 1;
+		dai_link->be_hw_params_fixup	= asoc_simple_be_hw_params_fixup;
+
+		cconf	= simple_props_to_codec_conf(dai_props, 0);
+
+		ret = simple_parse_node(priv, np, li, prefix, NULL);
+		if (ret < 0)
+			goto out_put_node;
+
+		snprintf(dai_name, sizeof(dai_name), "be.%s", codecs->dai_name);
+
+		/* check "prefix" from top node */
+		snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node,
+					      PREFIX "prefix");
+		snd_soc_of_parse_node_prefix(node, cconf, codecs->of_node,
+					     "prefix");
+		snd_soc_of_parse_node_prefix(np, cconf, codecs->of_node,
+					     "prefix");
+	}
+
+	simple_parse_convert(dev, np, &dai_props->adata);
+
+	snd_soc_dai_link_set_capabilities(dai_link);
+
+	ret = simple_link_init(priv, node, codec, li, prefix, dai_name);
+
+out_put_node:
+	li->link++;
+
+	of_node_put(node);
+	return ret;
+}
+
+static int simple_dai_link_of(struct asoc_simple_priv *priv,
+			      struct device_node *np,
+			      struct device_node *codec,
+			      struct link_info *li,
+			      bool is_top)
+{
+	struct device *dev = simple_priv_to_dev(priv);
+	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
+	struct snd_soc_dai_link_component *cpus = asoc_link_to_cpu(dai_link, 0);
+	struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, 0);
+	struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, 0);
+	struct device_node *cpu = NULL;
+	struct device_node *node = NULL;
+	struct device_node *plat = NULL;
+	char dai_name[64];
+	char prop[128];
+	char *prefix = "";
+	int ret, single_cpu = 0;
+
+	cpu  = np;
+	node = of_get_parent(np);
+
+	dev_dbg(dev, "link_of (%pOF)\n", node);
+
+	/* For single DAI link & old style of DT node */
+	if (is_top)
+		prefix = PREFIX;
+
+	snprintf(prop, sizeof(prop), "%splat", prefix);
+	plat = of_get_child_by_name(node, prop);
+
+	ret = simple_parse_node(priv, cpu, li, prefix, &single_cpu);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	ret = simple_parse_node(priv, codec, li, prefix, NULL);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	ret = asoc_simple_parse_platform(plat, platforms);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	snprintf(dai_name, sizeof(dai_name),
+		 "%s-%s", cpus->dai_name, codecs->dai_name);
+
+	asoc_simple_canonicalize_cpu(cpus, single_cpu);
+	asoc_simple_canonicalize_platform(platforms, cpus);
+
+	ret = simple_link_init(priv, node, codec, li, prefix, dai_name);
+
+dai_link_of_err:
+	of_node_put(plat);
+	of_node_put(node);
+
+	li->link++;
+
+	return ret;
+}
+
+static int __simple_for_each_link(struct asoc_simple_priv *priv,
+			struct link_info *li,
+			int (*func_noml)(struct asoc_simple_priv *priv,
+					 struct device_node *np,
+					 struct device_node *codec,
+					 struct link_info *li, bool is_top),
+			int (*func_dpcm)(struct asoc_simple_priv *priv,
+					 struct device_node *np,
+					 struct device_node *codec,
+					 struct link_info *li, bool is_top))
+{
+	struct device *dev = simple_priv_to_dev(priv);
+	struct device_node *top = dev->of_node;
+	struct device_node *node;
+	uintptr_t dpcm_selectable = (uintptr_t)of_device_get_match_data(dev);
+	bool is_top = 0;
+	int ret = 0;
+
+	/* Check if it has dai-link */
+	node = of_get_child_by_name(top, PREFIX "dai-link");
+	if (!node) {
+		node = of_node_get(top);
+		is_top = 1;
+	}
+
+	/* loop for all dai-link */
+	do {
+		struct asoc_simple_data adata;
+		struct device_node *codec;
+		struct device_node *plat;
+		struct device_node *np;
+		int num = of_get_child_count(node);
+
+		/* get codec */
+		codec = of_get_child_by_name(node, is_top ?
+					     PREFIX "codec" : "codec");
+		if (!codec) {
+			ret = -ENODEV;
+			goto error;
+		}
+		/* get platform */
+		plat = of_get_child_by_name(node, is_top ?
+					    PREFIX "plat" : "plat");
+
+		/* get convert-xxx property */
+		memset(&adata, 0, sizeof(adata));
+		for_each_child_of_node(node, np)
+			simple_parse_convert(dev, np, &adata);
+
+		/* loop for all CPU/Codec node */
+		for_each_child_of_node(node, np) {
+			if (plat == np)
+				continue;
+			/*
+			 * It is DPCM
+			 * if it has many CPUs,
+			 * or has convert-xxx property
+			 */
+			if (dpcm_selectable &&
+			    (num > 2 || asoc_simple_is_convert_required(&adata))) {
+				/*
+				 * np
+				 *	 |1(CPU)|0(Codec)  li->cpu
+				 * CPU	 |Pass  |return
+				 * Codec |return|Pass
+				 */
+				if (li->cpu != (np == codec))
+					ret = func_dpcm(priv, np, codec, li, is_top);
+			/* else normal sound */
+			} else {
+				/*
+				 * np
+				 *	 |1(CPU)|0(Codec)  li->cpu
+				 * CPU	 |Pass  |return
+				 * Codec |return|return
+				 */
+				if (li->cpu && (np != codec))
+					ret = func_noml(priv, np, codec, li, is_top);
+			}
+
+			if (ret < 0) {
+				of_node_put(codec);
+				of_node_put(plat);
+				of_node_put(np);
+				goto error;
+			}
+		}
+
+		of_node_put(codec);
+		node = of_get_next_child(top, node);
+	} while (!is_top && node);
+
+ error:
+	of_node_put(node);
+	return ret;
+}
+
+static int simple_for_each_link(struct asoc_simple_priv *priv,
+				struct link_info *li,
+				int (*func_noml)(struct asoc_simple_priv *priv,
+						 struct device_node *np,
+						 struct device_node *codec,
+						 struct link_info *li, bool is_top),
+				int (*func_dpcm)(struct asoc_simple_priv *priv,
+						 struct device_node *np,
+						 struct device_node *codec,
+						 struct link_info *li, bool is_top))
+{
+	int ret;
+	/*
+	 * Detect all CPU first, and Detect all Codec 2nd.
+	 *
+	 * In Normal sound case, all DAIs are detected
+	 * as "CPU-Codec".
+	 *
+	 * In DPCM sound case,
+	 * all CPUs   are detected as "CPU-dummy", and
+	 * all Codecs are detected as "dummy-Codec".
+	 * To avoid random sub-device numbering,
+	 * detect "dummy-Codec" in last;
+	 */
+	for (li->cpu = 1; li->cpu >= 0; li->cpu--) {
+		ret = __simple_for_each_link(priv, li, func_noml, func_dpcm);
+		if (ret < 0)
+			break;
+	}
+
+	return ret;
+}
+
+static int simple_parse_of(struct asoc_simple_priv *priv, struct link_info *li)
+{
+	struct snd_soc_card *card = simple_priv_to_card(priv);
+	int ret;
+
+	ret = asoc_simple_parse_widgets(card, PREFIX);
+	if (ret < 0)
+		return ret;
+
+	ret = asoc_simple_parse_routing(card, PREFIX);
+	if (ret < 0)
+		return ret;
+
+	ret = asoc_simple_parse_pin_switches(card, PREFIX);
+	if (ret < 0)
+		return ret;
+
+	/* Single/Muti DAI link(s) & New style of DT node */
+	memset(li, 0, sizeof(*li));
+	ret = simple_for_each_link(priv, li,
+				   simple_dai_link_of,
+				   simple_dai_link_of_dpcm);
+	if (ret < 0)
+		return ret;
+
+	ret = asoc_simple_parse_card_name(card, PREFIX);
+	if (ret < 0)
+		return ret;
+
+	ret = snd_soc_of_parse_aux_devs(card, PREFIX "aux-devs");
+
+	return ret;
+}
+
+static int simple_count_noml(struct asoc_simple_priv *priv,
+			     struct device_node *np,
+			     struct device_node *codec,
+			     struct link_info *li, bool is_top)
+{
+	if (li->link >= SNDRV_MAX_LINKS) {
+		struct device *dev = simple_priv_to_dev(priv);
+
+		dev_err(dev, "too many links\n");
+		return -EINVAL;
+	}
+
+	li->num[li->link].cpus		= 1;
+	li->num[li->link].codecs	= 1;
+	li->num[li->link].platforms	= 1;
+
+	li->link += 1;
+
+	return 0;
+}
+
+static int simple_count_dpcm(struct asoc_simple_priv *priv,
+			     struct device_node *np,
+			     struct device_node *codec,
+			     struct link_info *li, bool is_top)
+{
+	if (li->link >= SNDRV_MAX_LINKS) {
+		struct device *dev = simple_priv_to_dev(priv);
+
+		dev_err(dev, "too many links\n");
+		return -EINVAL;
+	}
+
+	if (li->cpu) {
+		li->num[li->link].cpus		= 1;
+		li->num[li->link].platforms	= 1;
+
+		li->link++; /* CPU-dummy */
+	} else {
+		li->num[li->link].codecs	= 1;
+
+		li->link++; /* dummy-Codec */
+	}
+
+	return 0;
+}
+
+static int simple_get_dais_count(struct asoc_simple_priv *priv,
+				 struct link_info *li)
+{
+	struct device *dev = simple_priv_to_dev(priv);
+	struct device_node *top = dev->of_node;
+
+	/*
+	 * link_num :	number of links.
+	 *		CPU-Codec / CPU-dummy / dummy-Codec
+	 * dais_num :	number of DAIs
+	 * ccnf_num :	number of codec_conf
+	 *		same number for "dummy-Codec"
+	 *
+	 * ex1)
+	 * CPU0 --- Codec0	link : 5
+	 * CPU1 --- Codec1	dais : 7
+	 * CPU2 -/		ccnf : 1
+	 * CPU3 --- Codec2
+	 *
+	 *	=> 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec
+	 *	=> 7 DAIs  = 4xCPU + 3xCodec
+	 *	=> 1 ccnf  = 1xdummy-Codec
+	 *
+	 * ex2)
+	 * CPU0 --- Codec0	link : 5
+	 * CPU1 --- Codec1	dais : 6
+	 * CPU2 -/		ccnf : 1
+	 * CPU3 -/
+	 *
+	 *	=> 5 links = 1xCPU-Codec + 3xCPU-dummy + 1xdummy-Codec
+	 *	=> 6 DAIs  = 4xCPU + 2xCodec
+	 *	=> 1 ccnf  = 1xdummy-Codec
+	 *
+	 * ex3)
+	 * CPU0 --- Codec0	link : 6
+	 * CPU1 -/		dais : 6
+	 * CPU2 --- Codec1	ccnf : 2
+	 * CPU3 -/
+	 *
+	 *	=> 6 links = 0xCPU-Codec + 4xCPU-dummy + 2xdummy-Codec
+	 *	=> 6 DAIs  = 4xCPU + 2xCodec
+	 *	=> 2 ccnf  = 2xdummy-Codec
+	 *
+	 * ex4)
+	 * CPU0 --- Codec0 (convert-rate)	link : 3
+	 * CPU1 --- Codec1			dais : 4
+	 *					ccnf : 1
+	 *
+	 *	=> 3 links = 1xCPU-Codec + 1xCPU-dummy + 1xdummy-Codec
+	 *	=> 4 DAIs  = 2xCPU + 2xCodec
+	 *	=> 1 ccnf  = 1xdummy-Codec
+	 */
+	if (!top) {
+		li->num[0].cpus		= 1;
+		li->num[0].codecs	= 1;
+		li->num[0].platforms	= 1;
+
+		li->link = 1;
+		return 0;
+	}
+
+	return simple_for_each_link(priv, li,
+				    simple_count_noml,
+				    simple_count_dpcm);
+}
+
+static int simple_soc_probe(struct snd_soc_card *card)
+{
+	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(card);
+	int ret;
+
+	ret = asoc_simple_init_hp(card, &priv->hp_jack, PREFIX);
+	if (ret < 0)
+		return ret;
+
+	ret = asoc_simple_init_mic(card, &priv->mic_jack, PREFIX);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int asoc_simple_probe(struct platform_device *pdev)
+{
+	struct asoc_simple_priv *priv;
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct snd_soc_card *card;
+	struct link_info *li;
+	int ret;
+
+	/* Allocate the private data and the DAI link array */
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	card = simple_priv_to_card(priv);
+	card->owner		= THIS_MODULE;
+	card->dev		= dev;
+	card->probe		= simple_soc_probe;
+	card->driver_name       = "simple-card";
+
+	li = devm_kzalloc(dev, sizeof(*li), GFP_KERNEL);
+	if (!li)
+		return -ENOMEM;
+
+	ret = simple_get_dais_count(priv, li);
+	if (ret < 0)
+		return ret;
+
+	if (!li->link)
+		return -EINVAL;
+
+	ret = asoc_simple_init_priv(priv, li);
+	if (ret < 0)
+		return ret;
+
+	if (np && of_device_is_available(np)) {
+
+		ret = simple_parse_of(priv, li);
+		if (ret < 0) {
+			dev_err_probe(dev, ret, "parse error\n");
+			goto err;
+		}
+
+	} else {
+		struct asoc_simple_card_info *cinfo;
+		struct snd_soc_dai_link_component *cpus;
+		struct snd_soc_dai_link_component *codecs;
+		struct snd_soc_dai_link_component *platform;
+		struct snd_soc_dai_link *dai_link = priv->dai_link;
+		struct simple_dai_props *dai_props = priv->dai_props;
+
+		ret = -EINVAL;
+
+		cinfo = dev->platform_data;
+		if (!cinfo) {
+			dev_err(dev, "no info for asoc-simple-card\n");
+			goto err;
+		}
+
+		if (!cinfo->name ||
+		    !cinfo->codec_dai.name ||
+		    !cinfo->codec ||
+		    !cinfo->platform ||
+		    !cinfo->cpu_dai.name) {
+			dev_err(dev, "insufficient asoc_simple_card_info settings\n");
+			goto err;
+		}
+
+		cpus			= dai_link->cpus;
+		cpus->dai_name		= cinfo->cpu_dai.name;
+
+		codecs			= dai_link->codecs;
+		codecs->name		= cinfo->codec;
+		codecs->dai_name	= cinfo->codec_dai.name;
+
+		platform		= dai_link->platforms;
+		platform->name		= cinfo->platform;
+
+		card->name		= (cinfo->card) ? cinfo->card : cinfo->name;
+		dai_link->name		= cinfo->name;
+		dai_link->stream_name	= cinfo->name;
+		dai_link->dai_fmt	= cinfo->daifmt;
+		dai_link->init		= asoc_simple_dai_init;
+		memcpy(dai_props->cpu_dai, &cinfo->cpu_dai,
+					sizeof(*dai_props->cpu_dai));
+		memcpy(dai_props->codec_dai, &cinfo->codec_dai,
+					sizeof(*dai_props->codec_dai));
+	}
+
+	snd_soc_card_set_drvdata(card, priv);
+
+	asoc_simple_debug_info(priv);
+
+	ret = devm_snd_soc_register_card(dev, card);
+	if (ret < 0)
+		goto err;
+
+	devm_kfree(dev, li);
+	return 0;
+err:
+	asoc_simple_clean_reference(card);
+
+	return ret;
+}
+
+static const struct of_device_id simple_of_match[] = {
+	{ .compatible = "simple-audio-card", },
+	{ .compatible = "simple-scu-audio-card",
+	  .data = (void *)DPCM_SELECTABLE },
+	{},
+};
+MODULE_DEVICE_TABLE(of, simple_of_match);
+
+static struct platform_driver asoc_simple_card = {
+	.driver = {
+		.name = "asoc-simple-card",
+		.pm = &snd_soc_pm_ops,
+		.of_match_table = simple_of_match,
+	},
+	.probe = asoc_simple_probe,
+	.remove = asoc_simple_remove,
+};
+
+module_platform_driver(asoc_simple_card);
+
+MODULE_ALIAS("platform:asoc-simple-card");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("ASoC Simple Sound Card");
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");