sound/soc/generic/simple-card.c - linux-mtk - Git at Google

 // 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/platform_device.h>
 #include <linux/string.h>
 #include <sound/simple_card.h>
 #include <sound/soc-dai.h>
 #include <sound/soc.h>

 struct simple_card_data {
 	struct snd_soc_card snd_card;
 	struct simple_dai_props {
 		struct asoc_simple_dai cpu_dai;
 		struct asoc_simple_dai codec_dai;
 		unsigned int mclk_fs;
 	} *dai_props;
 	unsigned int mclk_fs;
 	struct asoc_simple_jack hp_jack;
 	struct asoc_simple_jack mic_jack;
 	struct snd_soc_dai_link *dai_link;
 };

 #define simple_priv_to_card(priv) (&(priv)->snd_card)
 #define simple_priv_to_props(priv, i) ((priv)->dai_props + (i))
 #define simple_priv_to_dev(priv) (simple_priv_to_card(priv)->dev)
 #define simple_priv_to_link(priv, i) (simple_priv_to_card(priv)->dai_link + (i))

 #define DAI	"sound-dai"
 #define CELL	"#sound-dai-cells"
 #define PREFIX	"simple-audio-card,"

 static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct simple_card_data *priv =	snd_soc_card_get_drvdata(rtd->card);
 	struct simple_dai_props *dai_props =
 		simple_priv_to_props(priv, rtd->num);
 	int ret;

 	ret = asoc_simple_card_clk_enable(&dai_props->cpu_dai);
 	if (ret)
 		return ret;

 	ret = asoc_simple_card_clk_enable(&dai_props->codec_dai);
 	if (ret)
 		asoc_simple_card_clk_disable(&dai_props->cpu_dai);

 	return ret;
 }

 static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct simple_card_data *priv =	snd_soc_card_get_drvdata(rtd->card);
 	struct simple_dai_props *dai_props =
 		simple_priv_to_props(priv, rtd->num);

 	asoc_simple_card_clk_disable(&dai_props->cpu_dai);

 	asoc_simple_card_clk_disable(&dai_props->codec_dai);
 }

 static int asoc_simple_set_clk_rate(struct asoc_simple_dai *simple_dai,
 				    unsigned long rate)
 {
 	if (!simple_dai->clk)
 		return 0;

 	if (clk_get_rate(simple_dai->clk) == rate)
 		return 0;

 	return clk_set_rate(simple_dai->clk, rate);
 }

 static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream,
 				      struct snd_pcm_hw_params *params)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 	struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
 	struct simple_dai_props *dai_props =
 		simple_priv_to_props(priv, rtd->num);
 	unsigned int mclk, mclk_fs = 0;
 	int ret = 0;

 	if (priv->mclk_fs)
 		mclk_fs = priv->mclk_fs;
 	else if (dai_props->mclk_fs)
 		mclk_fs = dai_props->mclk_fs;

 	if (mclk_fs) {
 		mclk = params_rate(params) * mclk_fs;

 		ret = asoc_simple_set_clk_rate(&dai_props->codec_dai, mclk);
 		if (ret < 0)
 			return ret;

 		ret = asoc_simple_set_clk_rate(&dai_props->cpu_dai, mclk);
 		if (ret < 0)
 			return ret;

 		ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
 					     SND_SOC_CLOCK_IN);
 		if (ret && ret != -ENOTSUPP)
 			goto err;

 		ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
 					     SND_SOC_CLOCK_OUT);
 		if (ret && ret != -ENOTSUPP)
 			goto err;
 	}
 	return 0;
 err:
 	return ret;
 }

 static const struct snd_soc_ops asoc_simple_card_ops = {
 	.startup = asoc_simple_card_startup,
 	.shutdown = asoc_simple_card_shutdown,
 	.hw_params = asoc_simple_card_hw_params,
 };

 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
 {
 	struct simple_card_data *priv =	snd_soc_card_get_drvdata(rtd->card);
 	struct snd_soc_dai *codec = rtd->codec_dai;
 	struct snd_soc_dai *cpu = rtd->cpu_dai;
 	struct simple_dai_props *dai_props =
 		simple_priv_to_props(priv, rtd->num);
 	int ret;

 	ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai);
 	if (ret < 0)
 		return ret;

 	ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai);
 	if (ret < 0)
 		return ret;

 	return 0;
 }

 static int asoc_simple_card_dai_link_of(struct device_node *node,
 					struct simple_card_data *priv,
 					int idx,
 					bool is_top_level_node)
 {
 	struct device *dev = simple_priv_to_dev(priv);
 	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
 	struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
 	struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai;
 	struct asoc_simple_dai *codec_dai = &dai_props->codec_dai;
 	struct device_node *cpu = NULL;
 	struct device_node *plat = NULL;
 	struct device_node *codec = NULL;
 	char prop[128];
 	char *prefix = "";
 	int ret, single_cpu;

 	/* For single DAI link & old style of DT node */
 	if (is_top_level_node)
 		prefix = PREFIX;

 	snprintf(prop, sizeof(prop), "%scpu", prefix);
 	cpu = of_get_child_by_name(node, prop);

 	if (!cpu) {
 		ret = -EINVAL;
 		dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
 		goto dai_link_of_err;
 	}

 	snprintf(prop, sizeof(prop), "%splat", prefix);
 	plat = of_get_child_by_name(node, prop);

 	snprintf(prop, sizeof(prop), "%scodec", prefix);
 	codec = of_get_child_by_name(node, prop);

 	if (!codec) {
 		ret = -EINVAL;
 		dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
 		goto dai_link_of_err;
 	}

 	ret = asoc_simple_card_parse_daifmt(dev, node, codec,
 					    prefix, &dai_link->dai_fmt);
 	if (ret < 0)
 		goto dai_link_of_err;

 	of_property_read_u32(node, "mclk-fs", &dai_props->mclk_fs);

 	ret = asoc_simple_card_parse_cpu(cpu, dai_link,
 					 DAI, CELL, &single_cpu);
 	if (ret < 0)
 		goto dai_link_of_err;

 	ret = asoc_simple_card_parse_codec(codec, dai_link, DAI, CELL);
 	if (ret < 0)
 		goto dai_link_of_err;

 	ret = asoc_simple_card_parse_platform(plat, dai_link, DAI, CELL);
 	if (ret < 0)
 		goto dai_link_of_err;

 	ret = asoc_simple_card_of_parse_tdm(cpu, cpu_dai);
 	if (ret < 0)
 		goto dai_link_of_err;

 	ret = asoc_simple_card_of_parse_tdm(codec, codec_dai);
 	if (ret < 0)
 		goto dai_link_of_err;

 	ret = asoc_simple_card_parse_clk_cpu(dev, cpu, dai_link, cpu_dai);
 	if (ret < 0)
 		goto dai_link_of_err;

 	ret = asoc_simple_card_parse_clk_codec(dev, codec, dai_link, codec_dai);
 	if (ret < 0)
 		goto dai_link_of_err;

 	ret = asoc_simple_card_canonicalize_dailink(dai_link);
 	if (ret < 0)
 		goto dai_link_of_err;

 	ret = asoc_simple_card_set_dailink_name(dev, dai_link,
 						"%s-%s",
 						dai_link->cpu_dai_name,
 						dai_link->codec_dai_name);
 	if (ret < 0)
 		goto dai_link_of_err;

 	dai_link->ops = &asoc_simple_card_ops;
 	dai_link->init = asoc_simple_card_dai_init;

 	asoc_simple_card_canonicalize_cpu(dai_link, single_cpu);

 dai_link_of_err:
 	of_node_put(cpu);
 	of_node_put(codec);

 	return ret;
 }

 static int asoc_simple_card_parse_aux_devs(struct device_node *node,
 					   struct simple_card_data *priv)
 {
 	struct device *dev = simple_priv_to_dev(priv);
 	struct device_node *aux_node;
 	struct snd_soc_card *card = simple_priv_to_card(priv);
 	int i, n, len;

 	if (!of_find_property(node, PREFIX "aux-devs", &len))
 		return 0;		/* Ok to have no aux-devs */

 	n = len / sizeof(__be32);
 	if (n <= 0)
 		return -EINVAL;

 	card->aux_dev = devm_kcalloc(dev,
 			n, sizeof(*card->aux_dev), GFP_KERNEL);
 	if (!card->aux_dev)
 		return -ENOMEM;

 	for (i = 0; i < n; i++) {
 		aux_node = of_parse_phandle(node, PREFIX "aux-devs", i);
 		if (!aux_node)
 			return -EINVAL;
 		card->aux_dev[i].codec_of_node = aux_node;
 	}

 	card->num_aux_devs = n;
 	return 0;
 }

 static int asoc_simple_card_parse_of(struct simple_card_data *priv)
 {
 	struct device *dev = simple_priv_to_dev(priv);
 	struct snd_soc_card *card = simple_priv_to_card(priv);
 	struct device_node *dai_link;
 	struct device_node *node = dev->of_node;
 	int ret;

 	if (!node)
 		return -EINVAL;

 	dai_link = of_get_child_by_name(node, PREFIX "dai-link");

 	ret = asoc_simple_card_of_parse_widgets(card, PREFIX);
 	if (ret < 0)
 		goto card_parse_end;

 	ret = asoc_simple_card_of_parse_routing(card, PREFIX, 1);
 	if (ret < 0)
 		goto card_parse_end;

 	/* Factor to mclk, used in hw_params() */
 	of_property_read_u32(node, PREFIX "mclk-fs", &priv->mclk_fs);

 	/* Single/Muti DAI link(s) & New style of DT node */
 	if (dai_link) {
 		struct device_node *np = NULL;
 		int i = 0;

 		for_each_child_of_node(node, np) {
 			dev_dbg(dev, "\tlink %d:\n", i);
 			ret = asoc_simple_card_dai_link_of(np, priv,
 							   i, false);
 			if (ret < 0) {
 				of_node_put(np);
 				goto card_parse_end;
 			}
 			i++;
 		}
 	} else {
 		/* For single DAI link & old style of DT node */
 		ret = asoc_simple_card_dai_link_of(node, priv, 0, true);
 		if (ret < 0)
 			goto card_parse_end;
 	}

 	ret = asoc_simple_card_parse_card_name(card, PREFIX);
 	if (ret < 0)
 		goto card_parse_end;

 	ret = asoc_simple_card_parse_aux_devs(node, priv);

 card_parse_end:
 	of_node_put(dai_link);

 	return ret;
 }

 static int asoc_simple_soc_card_probe(struct snd_soc_card *card)
 {
 	struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
 	int ret;

 	ret = asoc_simple_card_init_hp(card, &priv->hp_jack, PREFIX);
 	if (ret < 0)
 		return ret;

 	ret = asoc_simple_card_init_mic(card, &priv->mic_jack, PREFIX);
 	if (ret < 0)
 		return ret;

 	return 0;
 }

 static int asoc_simple_card_probe(struct platform_device *pdev)
 {
 	struct simple_card_data *priv;
 	struct snd_soc_dai_link *dai_link;
 	struct simple_dai_props *dai_props;
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
 	struct snd_soc_card *card;
 	int num, ret;

 	/* Get the number of DAI links */
 	if (np && of_get_child_by_name(np, PREFIX "dai-link"))
 		num = of_get_child_count(np);
 	else
 		num = 1;

 	/* Allocate the private data and the DAI link array */
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;

 	dai_props = devm_kcalloc(dev, num, sizeof(*dai_props), GFP_KERNEL);
 	dai_link  = devm_kcalloc(dev, num, sizeof(*dai_link), GFP_KERNEL);
 	if (!dai_props || !dai_link)
 		return -ENOMEM;

 	priv->dai_props			= dai_props;
 	priv->dai_link			= dai_link;

 	/* Init snd_soc_card */
 	card = simple_priv_to_card(priv);
 	card->owner		= THIS_MODULE;
 	card->dev		= dev;
 	card->dai_link		= priv->dai_link;
 	card->num_links		= num;
 	card->probe		= asoc_simple_soc_card_probe;

 	if (np && of_device_is_available(np)) {

 		ret = asoc_simple_card_parse_of(priv);
 		if (ret < 0) {
 			if (ret != -EPROBE_DEFER)
 				dev_err(dev, "parse error %d\n", ret);
 			goto err;
 		}

 	} else {
 		struct asoc_simple_card_info *cinfo;

 		cinfo = dev->platform_data;
 		if (!cinfo) {
 			dev_err(dev, "no info for asoc-simple-card\n");
 			return -EINVAL;
 		}

 		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");
 			return -EINVAL;
 		}

 		card->name		= (cinfo->card) ? cinfo->card : cinfo->name;
 		dai_link->name		= cinfo->name;
 		dai_link->stream_name	= cinfo->name;
 		dai_link->platform_name	= cinfo->platform;
 		dai_link->codec_name	= cinfo->codec;
 		dai_link->cpu_dai_name	= cinfo->cpu_dai.name;
 		dai_link->codec_dai_name = cinfo->codec_dai.name;
 		dai_link->dai_fmt	= cinfo->daifmt;
 		dai_link->init		= asoc_simple_card_dai_init;
 		memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
 					sizeof(priv->dai_props->cpu_dai));
 		memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
 					sizeof(priv->dai_props->codec_dai));
 	}

 	snd_soc_card_set_drvdata(card, priv);

 	ret = devm_snd_soc_register_card(dev, card);
 	if (ret < 0)
 		goto err;

 	return 0;
 err:
 	asoc_simple_card_clean_reference(card);

 	return ret;
 }

 static int asoc_simple_card_remove(struct platform_device *pdev)
 {
 	struct snd_soc_card *card = platform_get_drvdata(pdev);

 	return asoc_simple_card_clean_reference(card);
 }

 static const struct of_device_id asoc_simple_of_match[] = {
 	{ .compatible = "simple-audio-card", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, asoc_simple_of_match);

 static struct platform_driver asoc_simple_card = {
 	.driver = {
 		.name = "asoc-simple-card",
 		.pm = &snd_soc_pm_ops,
 		.of_match_table = asoc_simple_of_match,
 	},
 	.probe = asoc_simple_card_probe,
 	.remove = asoc_simple_card_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>");
	// 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/platform_device.h>
	#include <linux/string.h>
	#include <sound/simple_card.h>
	#include <sound/soc-dai.h>
	#include <sound/soc.h>

	struct simple_card_data {
	struct snd_soc_card snd_card;
	struct simple_dai_props {
	struct asoc_simple_dai cpu_dai;
	struct asoc_simple_dai codec_dai;
	unsigned int mclk_fs;
	} *dai_props;
	unsigned int mclk_fs;
	struct asoc_simple_jack hp_jack;
	struct asoc_simple_jack mic_jack;
	struct snd_soc_dai_link *dai_link;
	};

	#define simple_priv_to_card(priv) (&(priv)->snd_card)
	#define simple_priv_to_props(priv, i) ((priv)->dai_props + (i))
	#define simple_priv_to_dev(priv) (simple_priv_to_card(priv)->dev)
	#define simple_priv_to_link(priv, i) (simple_priv_to_card(priv)->dai_link + (i))

	#define DAI "sound-dai"
	#define CELL "#sound-dai-cells"
	#define PREFIX "simple-audio-card,"

	static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
	{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
	struct simple_dai_props *dai_props =
	simple_priv_to_props(priv, rtd->num);
	int ret;

	ret = asoc_simple_card_clk_enable(&dai_props->cpu_dai);
	if (ret)
	return ret;

	ret = asoc_simple_card_clk_enable(&dai_props->codec_dai);
	if (ret)
	asoc_simple_card_clk_disable(&dai_props->cpu_dai);

	return ret;
	}

	static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
	{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
	struct simple_dai_props *dai_props =
	simple_priv_to_props(priv, rtd->num);

	asoc_simple_card_clk_disable(&dai_props->cpu_dai);

	asoc_simple_card_clk_disable(&dai_props->codec_dai);
	}

	static int asoc_simple_set_clk_rate(struct asoc_simple_dai *simple_dai,
	unsigned long rate)
	{
	if (!simple_dai->clk)
	return 0;

	if (clk_get_rate(simple_dai->clk) == rate)
	return 0;

	return clk_set_rate(simple_dai->clk, rate);
	}

	static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
	{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
	struct simple_dai_props *dai_props =
	simple_priv_to_props(priv, rtd->num);
	unsigned int mclk, mclk_fs = 0;
	int ret = 0;

	if (priv->mclk_fs)
	mclk_fs = priv->mclk_fs;
	else if (dai_props->mclk_fs)
	mclk_fs = dai_props->mclk_fs;

	if (mclk_fs) {
	mclk = params_rate(params) * mclk_fs;

	ret = asoc_simple_set_clk_rate(&dai_props->codec_dai, mclk);
	if (ret < 0)
	return ret;

	ret = asoc_simple_set_clk_rate(&dai_props->cpu_dai, mclk);
	if (ret < 0)
	return ret;

	ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
	SND_SOC_CLOCK_IN);
	if (ret && ret != -ENOTSUPP)
	goto err;

	ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
	SND_SOC_CLOCK_OUT);
	if (ret && ret != -ENOTSUPP)
	goto err;
	}
	return 0;
	err:
	return ret;
	}

	static const struct snd_soc_ops asoc_simple_card_ops = {
	.startup = asoc_simple_card_startup,
	.shutdown = asoc_simple_card_shutdown,
	.hw_params = asoc_simple_card_hw_params,
	};

	static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
	{
	struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
	struct snd_soc_dai *codec = rtd->codec_dai;
	struct snd_soc_dai *cpu = rtd->cpu_dai;
	struct simple_dai_props *dai_props =
	simple_priv_to_props(priv, rtd->num);
	int ret;

	ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai);
	if (ret < 0)
	return ret;

	ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai);
	if (ret < 0)
	return ret;

	return 0;
	}

	static int asoc_simple_card_dai_link_of(struct device_node *node,
	struct simple_card_data *priv,
	int idx,
	bool is_top_level_node)
	{
	struct device *dev = simple_priv_to_dev(priv);
	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
	struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
	struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai;
	struct asoc_simple_dai *codec_dai = &dai_props->codec_dai;
	struct device_node *cpu = NULL;
	struct device_node *plat = NULL;
	struct device_node *codec = NULL;
	char prop[128];
	char *prefix = "";
	int ret, single_cpu;

	/* For single DAI link & old style of DT node */
	if (is_top_level_node)
	prefix = PREFIX;

	snprintf(prop, sizeof(prop), "%scpu", prefix);
	cpu = of_get_child_by_name(node, prop);

	if (!cpu) {
	ret = -EINVAL;
	dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
	goto dai_link_of_err;
	}

	snprintf(prop, sizeof(prop), "%splat", prefix);
	plat = of_get_child_by_name(node, prop);

	snprintf(prop, sizeof(prop), "%scodec", prefix);
	codec = of_get_child_by_name(node, prop);

	if (!codec) {
	ret = -EINVAL;
	dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
	goto dai_link_of_err;
	}

	ret = asoc_simple_card_parse_daifmt(dev, node, codec,
	prefix, &dai_link->dai_fmt);
	if (ret < 0)
	goto dai_link_of_err;

	of_property_read_u32(node, "mclk-fs", &dai_props->mclk_fs);

	ret = asoc_simple_card_parse_cpu(cpu, dai_link,
	DAI, CELL, &single_cpu);
	if (ret < 0)
	goto dai_link_of_err;

	ret = asoc_simple_card_parse_codec(codec, dai_link, DAI, CELL);
	if (ret < 0)
	goto dai_link_of_err;

	ret = asoc_simple_card_parse_platform(plat, dai_link, DAI, CELL);
	if (ret < 0)
	goto dai_link_of_err;

	ret = asoc_simple_card_of_parse_tdm(cpu, cpu_dai);
	if (ret < 0)
	goto dai_link_of_err;

	ret = asoc_simple_card_of_parse_tdm(codec, codec_dai);
	if (ret < 0)
	goto dai_link_of_err;

	ret = asoc_simple_card_parse_clk_cpu(dev, cpu, dai_link, cpu_dai);
	if (ret < 0)
	goto dai_link_of_err;

	ret = asoc_simple_card_parse_clk_codec(dev, codec, dai_link, codec_dai);
	if (ret < 0)
	goto dai_link_of_err;

	ret = asoc_simple_card_canonicalize_dailink(dai_link);
	if (ret < 0)
	goto dai_link_of_err;

	ret = asoc_simple_card_set_dailink_name(dev, dai_link,
	"%s-%s",
	dai_link->cpu_dai_name,
	dai_link->codec_dai_name);
	if (ret < 0)
	goto dai_link_of_err;

	dai_link->ops = &asoc_simple_card_ops;
	dai_link->init = asoc_simple_card_dai_init;

	asoc_simple_card_canonicalize_cpu(dai_link, single_cpu);

	dai_link_of_err:
	of_node_put(cpu);
	of_node_put(codec);

	return ret;
	}

	static int asoc_simple_card_parse_aux_devs(struct device_node *node,
	struct simple_card_data *priv)
	{
	struct device *dev = simple_priv_to_dev(priv);
	struct device_node *aux_node;
	struct snd_soc_card *card = simple_priv_to_card(priv);
	int i, n, len;

	if (!of_find_property(node, PREFIX "aux-devs", &len))
	return 0; /* Ok to have no aux-devs */

	n = len / sizeof(__be32);
	if (n <= 0)
	return -EINVAL;

	card->aux_dev = devm_kcalloc(dev,
	n, sizeof(*card->aux_dev), GFP_KERNEL);
	if (!card->aux_dev)
	return -ENOMEM;

	for (i = 0; i < n; i++) {
	aux_node = of_parse_phandle(node, PREFIX "aux-devs", i);
	if (!aux_node)
	return -EINVAL;
	card->aux_dev[i].codec_of_node = aux_node;
	}

	card->num_aux_devs = n;
	return 0;
	}

	static int asoc_simple_card_parse_of(struct simple_card_data *priv)
	{
	struct device *dev = simple_priv_to_dev(priv);
	struct snd_soc_card *card = simple_priv_to_card(priv);
	struct device_node *dai_link;
	struct device_node *node = dev->of_node;
	int ret;

	if (!node)
	return -EINVAL;

	dai_link = of_get_child_by_name(node, PREFIX "dai-link");

	ret = asoc_simple_card_of_parse_widgets(card, PREFIX);
	if (ret < 0)
	goto card_parse_end;

	ret = asoc_simple_card_of_parse_routing(card, PREFIX, 1);
	if (ret < 0)
	goto card_parse_end;

	/* Factor to mclk, used in hw_params() */
	of_property_read_u32(node, PREFIX "mclk-fs", &priv->mclk_fs);

	/* Single/Muti DAI link(s) & New style of DT node */
	if (dai_link) {
	struct device_node *np = NULL;
	int i = 0;

	for_each_child_of_node(node, np) {
	dev_dbg(dev, "\tlink %d:\n", i);
	ret = asoc_simple_card_dai_link_of(np, priv,
	i, false);
	if (ret < 0) {
	of_node_put(np);
	goto card_parse_end;
	}
	i++;
	}
	} else {
	/* For single DAI link & old style of DT node */
	ret = asoc_simple_card_dai_link_of(node, priv, 0, true);
	if (ret < 0)
	goto card_parse_end;
	}

	ret = asoc_simple_card_parse_card_name(card, PREFIX);
	if (ret < 0)
	goto card_parse_end;

	ret = asoc_simple_card_parse_aux_devs(node, priv);

	card_parse_end:
	of_node_put(dai_link);

	return ret;
	}

	static int asoc_simple_soc_card_probe(struct snd_soc_card *card)
	{
	struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
	int ret;

	ret = asoc_simple_card_init_hp(card, &priv->hp_jack, PREFIX);
	if (ret < 0)
	return ret;

	ret = asoc_simple_card_init_mic(card, &priv->mic_jack, PREFIX);
	if (ret < 0)
	return ret;

	return 0;
	}

	static int asoc_simple_card_probe(struct platform_device *pdev)
	{
	struct simple_card_data *priv;
	struct snd_soc_dai_link *dai_link;
	struct simple_dai_props *dai_props;
	struct device *dev = &pdev->dev;
	struct device_node *np = dev->of_node;
	struct snd_soc_card *card;
	int num, ret;

	/* Get the number of DAI links */
	if (np && of_get_child_by_name(np, PREFIX "dai-link"))
	num = of_get_child_count(np);
	else
	num = 1;

	/* Allocate the private data and the DAI link array */
	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
	return -ENOMEM;

	dai_props = devm_kcalloc(dev, num, sizeof(*dai_props), GFP_KERNEL);
	dai_link = devm_kcalloc(dev, num, sizeof(*dai_link), GFP_KERNEL);
	if (!dai_props \|\| !dai_link)
	return -ENOMEM;

	priv->dai_props = dai_props;
	priv->dai_link = dai_link;

	/* Init snd_soc_card */
	card = simple_priv_to_card(priv);
	card->owner = THIS_MODULE;
	card->dev = dev;
	card->dai_link = priv->dai_link;
	card->num_links = num;
	card->probe = asoc_simple_soc_card_probe;

	if (np && of_device_is_available(np)) {

	ret = asoc_simple_card_parse_of(priv);
	if (ret < 0) {
	if (ret != -EPROBE_DEFER)
	dev_err(dev, "parse error %d\n", ret);
	goto err;
	}

	} else {
	struct asoc_simple_card_info *cinfo;

	cinfo = dev->platform_data;
	if (!cinfo) {
	dev_err(dev, "no info for asoc-simple-card\n");
	return -EINVAL;
	}

	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");
	return -EINVAL;
	}

	card->name = (cinfo->card) ? cinfo->card : cinfo->name;
	dai_link->name = cinfo->name;
	dai_link->stream_name = cinfo->name;
	dai_link->platform_name = cinfo->platform;
	dai_link->codec_name = cinfo->codec;
	dai_link->cpu_dai_name = cinfo->cpu_dai.name;
	dai_link->codec_dai_name = cinfo->codec_dai.name;
	dai_link->dai_fmt = cinfo->daifmt;
	dai_link->init = asoc_simple_card_dai_init;
	memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
	sizeof(priv->dai_props->cpu_dai));
	memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
	sizeof(priv->dai_props->codec_dai));
	}

	snd_soc_card_set_drvdata(card, priv);

	ret = devm_snd_soc_register_card(dev, card);
	if (ret < 0)
	goto err;

	return 0;
	err:
	asoc_simple_card_clean_reference(card);

	return ret;
	}

	static int asoc_simple_card_remove(struct platform_device *pdev)
	{
	struct snd_soc_card *card = platform_get_drvdata(pdev);

	return asoc_simple_card_clean_reference(card);
	}

	static const struct of_device_id asoc_simple_of_match[] = {
	{ .compatible = "simple-audio-card", },
	{},
	};
	MODULE_DEVICE_TABLE(of, asoc_simple_of_match);

	static struct platform_driver asoc_simple_card = {
	.driver = {
	.name = "asoc-simple-card",
	.pm = &snd_soc_pm_ops,
	.of_match_table = asoc_simple_of_match,
	},
	.probe = asoc_simple_card_probe,
	.remove = asoc_simple_card_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>");