Initial import

1 files changed, 3649 insertions, 0 deletions

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
new file mode 100644
index 000000000..23732523f
--- /dev/null
+++ b/sound/soc/soc-core.c
@@ -0,0 +1,3649 @@
+/*
+ * soc-core.c  --  ALSA SoC Audio Layer
+ *
+ * Copyright 2005 Wolfson Microelectronics PLC.
+ * Copyright 2005 Openedhand Ltd.
+ * Copyright (C) 2010 Slimlogic Ltd.
+ * Copyright (C) 2010 Texas Instruments Inc.
+ *
+ * Author: Liam Girdwood <lrg@slimlogic.co.uk>
+ *         with code, comments and ideas from :-
+ *         Richard Purdie <richard@openedhand.com>
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ *  TODO:
+ *   o Add hw rules to enforce rates, etc.
+ *   o More testing with other codecs/machines.
+ *   o Add more codecs and platforms to ensure good API coverage.
+ *   o Support TDM on PCM and I2S
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/bitops.h>
+#include <linux/debugfs.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <sound/core.h>
+#include <sound/jack.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dpcm.h>
+#include <sound/initval.h>
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/asoc.h>
+
+#define NAME_SIZE	32
+
+#ifdef CONFIG_DEBUG_FS
+struct dentry *snd_soc_debugfs_root;
+EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
+#endif
+
+static DEFINE_MUTEX(client_mutex);
+static LIST_HEAD(platform_list);
+static LIST_HEAD(codec_list);
+static LIST_HEAD(component_list);
+
+/*
+ * This is a timeout to do a DAPM powerdown after a stream is closed().
+ * It can be used to eliminate pops between different playback streams, e.g.
+ * between two audio tracks.
+ */
+static int pmdown_time = 5000;
+module_param(pmdown_time, int, 0);
+MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
+
+/* returns the minimum number of bytes needed to represent
+ * a particular given value */
+static int min_bytes_needed(unsigned long val)
+{
+	int c = 0;
+	int i;
+
+	for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
+		if (val & (1UL << i))
+			break;
+	c = (sizeof val * 8) - c;
+	if (!c || (c % 8))
+		c = (c + 8) / 8;
+	else
+		c /= 8;
+	return c;
+}
+
+/* fill buf which is 'len' bytes with a formatted
+ * string of the form 'reg: value\n' */
+static int format_register_str(struct snd_soc_codec *codec,
+			       unsigned int reg, char *buf, size_t len)
+{
+	int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
+	int regsize = codec->driver->reg_word_size * 2;
+	int ret;
+	char tmpbuf[len + 1];
+	char regbuf[regsize + 1];
+
+	/* since tmpbuf is allocated on the stack, warn the callers if they
+	 * try to abuse this function */
+	WARN_ON(len > 63);
+
+	/* +2 for ': ' and + 1 for '\n' */
+	if (wordsize + regsize + 2 + 1 != len)
+		return -EINVAL;
+
+	ret = snd_soc_read(codec, reg);
+	if (ret < 0) {
+		memset(regbuf, 'X', regsize);
+		regbuf[regsize] = '\0';
+	} else {
+		snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
+	}
+
+	/* prepare the buffer */
+	snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
+	/* copy it back to the caller without the '\0' */
+	memcpy(buf, tmpbuf, len);
+
+	return 0;
+}
+
+/* codec register dump */
+static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
+				  size_t count, loff_t pos)
+{
+	int i, step = 1;
+	int wordsize, regsize;
+	int len;
+	size_t total = 0;
+	loff_t p = 0;
+
+	wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
+	regsize = codec->driver->reg_word_size * 2;
+
+	len = wordsize + regsize + 2 + 1;
+
+	if (!codec->driver->reg_cache_size)
+		return 0;
+
+	if (codec->driver->reg_cache_step)
+		step = codec->driver->reg_cache_step;
+
+	for (i = 0; i < codec->driver->reg_cache_size; i += step) {
+		/* only support larger than PAGE_SIZE bytes debugfs
+		 * entries for the default case */
+		if (p >= pos) {
+			if (total + len >= count - 1)
+				break;
+			format_register_str(codec, i, buf + total, len);
+			total += len;
+		}
+		p += len;
+	}
+
+	total = min(total, count - 1);
+
+	return total;
+}
+
+static ssize_t codec_reg_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
+
+	return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
+}
+
+static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
+
+static ssize_t pmdown_time_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%ld\n", rtd->pmdown_time);
+}
+
+static ssize_t pmdown_time_set(struct device *dev,
+			       struct device_attribute *attr,
+			       const char *buf, size_t count)
+{
+	struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
+	int ret;
+
+	ret = kstrtol(buf, 10, &rtd->pmdown_time);
+	if (ret)
+		return ret;
+
+	return count;
+}
+
+static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
+
+static struct attribute *soc_dev_attrs[] = {
+	&dev_attr_codec_reg.attr,
+	&dev_attr_pmdown_time.attr,
+	NULL
+};
+
+static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
+				       struct attribute *attr, int idx)
+{
+	struct device *dev = kobj_to_dev(kobj);
+	struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
+
+	if (attr == &dev_attr_pmdown_time.attr)
+		return attr->mode; /* always visible */
+	return rtd->codec ? attr->mode : 0; /* enabled only with codec */
+}
+
+static const struct attribute_group soc_dapm_dev_group = {
+	.attrs = soc_dapm_dev_attrs,
+	.is_visible = soc_dev_attr_is_visible,
+};
+
+static const struct attribute_group soc_dev_roup = {
+	.attrs = soc_dev_attrs,
+	.is_visible = soc_dev_attr_is_visible,
+};
+
+static const struct attribute_group *soc_dev_attr_groups[] = {
+	&soc_dapm_dev_group,
+	&soc_dev_roup,
+	NULL
+};
+
+#ifdef CONFIG_DEBUG_FS
+static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
+				   size_t count, loff_t *ppos)
+{
+	ssize_t ret;
+	struct snd_soc_codec *codec = file->private_data;
+	char *buf;
+
+	if (*ppos < 0 || !count)
+		return -EINVAL;
+
+	buf = kmalloc(count, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	ret = soc_codec_reg_show(codec, buf, count, *ppos);
+	if (ret >= 0) {
+		if (copy_to_user(user_buf, buf, ret)) {
+			kfree(buf);
+			return -EFAULT;
+		}
+		*ppos += ret;
+	}
+
+	kfree(buf);
+	return ret;
+}
+
+static ssize_t codec_reg_write_file(struct file *file,
+		const char __user *user_buf, size_t count, loff_t *ppos)
+{
+	char buf[32];
+	size_t buf_size;
+	char *start = buf;
+	unsigned long reg, value;
+	struct snd_soc_codec *codec = file->private_data;
+	int ret;
+
+	buf_size = min(count, (sizeof(buf)-1));
+	if (copy_from_user(buf, user_buf, buf_size))
+		return -EFAULT;
+	buf[buf_size] = 0;
+
+	while (*start == ' ')
+		start++;
+	reg = simple_strtoul(start, &start, 16);
+	while (*start == ' ')
+		start++;
+	ret = kstrtoul(start, 16, &value);
+	if (ret)
+		return ret;
+
+	/* Userspace has been fiddling around behind the kernel's back */
+	add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
+
+	snd_soc_write(codec, reg, value);
+	return buf_size;
+}
+
+static const struct file_operations codec_reg_fops = {
+	.open = simple_open,
+	.read = codec_reg_read_file,
+	.write = codec_reg_write_file,
+	.llseek = default_llseek,
+};
+
+static void soc_init_component_debugfs(struct snd_soc_component *component)
+{
+	if (!component->card->debugfs_card_root)
+		return;
+
+	if (component->debugfs_prefix) {
+		char *name;
+
+		name = kasprintf(GFP_KERNEL, "%s:%s",
+			component->debugfs_prefix, component->name);
+		if (name) {
+			component->debugfs_root = debugfs_create_dir(name,
+				component->card->debugfs_card_root);
+			kfree(name);
+		}
+	} else {
+		component->debugfs_root = debugfs_create_dir(component->name,
+				component->card->debugfs_card_root);
+	}
+
+	if (!component->debugfs_root) {
+		dev_warn(component->dev,
+			"ASoC: Failed to create component debugfs directory\n");
+		return;
+	}
+
+	snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
+		component->debugfs_root);
+
+	if (component->init_debugfs)
+		component->init_debugfs(component);
+}
+
+static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
+{
+	debugfs_remove_recursive(component->debugfs_root);
+}
+
+static void soc_init_codec_debugfs(struct snd_soc_component *component)
+{
+	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
+
+	codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
+						 codec->component.debugfs_root,
+						 codec, &codec_reg_fops);
+	if (!codec->debugfs_reg)
+		dev_warn(codec->dev,
+			"ASoC: Failed to create codec register debugfs file\n");
+}
+
+static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
+				    size_t count, loff_t *ppos)
+{
+	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+	ssize_t len, ret = 0;
+	struct snd_soc_codec *codec;
+
+	if (!buf)
+		return -ENOMEM;
+
+	mutex_lock(&client_mutex);
+
+	list_for_each_entry(codec, &codec_list, list) {
+		len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
+			       codec->component.name);
+		if (len >= 0)
+			ret += len;
+		if (ret > PAGE_SIZE) {
+			ret = PAGE_SIZE;
+			break;
+		}
+	}
+
+	mutex_unlock(&client_mutex);
+
+	if (ret >= 0)
+		ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
+
+	kfree(buf);
+
+	return ret;
+}
+
+static const struct file_operations codec_list_fops = {
+	.read = codec_list_read_file,
+	.llseek = default_llseek,/* read accesses f_pos */
+};
+
+static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
+				  size_t count, loff_t *ppos)
+{
+	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+	ssize_t len, ret = 0;
+	struct snd_soc_component *component;
+	struct snd_soc_dai *dai;
+
+	if (!buf)
+		return -ENOMEM;
+
+	mutex_lock(&client_mutex);
+
+	list_for_each_entry(component, &component_list, list) {
+		list_for_each_entry(dai, &component->dai_list, list) {
+			len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
+				dai->name);
+			if (len >= 0)
+				ret += len;
+			if (ret > PAGE_SIZE) {
+				ret = PAGE_SIZE;
+				break;
+			}
+		}
+	}
+
+	mutex_unlock(&client_mutex);
+
+	ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
+
+	kfree(buf);
+
+	return ret;
+}
+
+static const struct file_operations dai_list_fops = {
+	.read = dai_list_read_file,
+	.llseek = default_llseek,/* read accesses f_pos */
+};
+
+static ssize_t platform_list_read_file(struct file *file,
+				       char __user *user_buf,
+				       size_t count, loff_t *ppos)
+{
+	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+	ssize_t len, ret = 0;
+	struct snd_soc_platform *platform;
+
+	if (!buf)
+		return -ENOMEM;
+
+	mutex_lock(&client_mutex);
+
+	list_for_each_entry(platform, &platform_list, list) {
+		len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
+			       platform->component.name);
+		if (len >= 0)
+			ret += len;
+		if (ret > PAGE_SIZE) {
+			ret = PAGE_SIZE;
+			break;
+		}
+	}
+
+	mutex_unlock(&client_mutex);
+
+	ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
+
+	kfree(buf);
+
+	return ret;
+}
+
+static const struct file_operations platform_list_fops = {
+	.read = platform_list_read_file,
+	.llseek = default_llseek,/* read accesses f_pos */
+};
+
+static void soc_init_card_debugfs(struct snd_soc_card *card)
+{
+	if (!snd_soc_debugfs_root)
+		return;
+
+	card->debugfs_card_root = debugfs_create_dir(card->name,
+						     snd_soc_debugfs_root);
+	if (!card->debugfs_card_root) {
+		dev_warn(card->dev,
+			 "ASoC: Failed to create card debugfs directory\n");
+		return;
+	}
+
+	card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
+						    card->debugfs_card_root,
+						    &card->pop_time);
+	if (!card->debugfs_pop_time)
+		dev_warn(card->dev,
+		       "ASoC: Failed to create pop time debugfs file\n");
+}
+
+static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
+{
+	debugfs_remove_recursive(card->debugfs_card_root);
+}
+
+
+static void snd_soc_debugfs_init(void)
+{
+	snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
+	if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
+		pr_warn("ASoC: Failed to create debugfs directory\n");
+		snd_soc_debugfs_root = NULL;
+		return;
+	}
+
+	if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
+				 &codec_list_fops))
+		pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
+
+	if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
+				 &dai_list_fops))
+		pr_warn("ASoC: Failed to create DAI list debugfs file\n");
+
+	if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
+				 &platform_list_fops))
+		pr_warn("ASoC: Failed to create platform list debugfs file\n");
+}
+
+static void snd_soc_debugfs_exit(void)
+{
+	debugfs_remove_recursive(snd_soc_debugfs_root);
+}
+
+#else
+
+#define soc_init_codec_debugfs NULL
+
+static inline void soc_init_component_debugfs(
+	struct snd_soc_component *component)
+{
+}
+
+static inline void soc_cleanup_component_debugfs(
+	struct snd_soc_component *component)
+{
+}
+
+static inline void soc_init_card_debugfs(struct snd_soc_card *card)
+{
+}
+
+static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
+{
+}
+
+static inline void snd_soc_debugfs_init(void)
+{
+}
+
+static inline void snd_soc_debugfs_exit(void)
+{
+}
+
+#endif
+
+struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
+		const char *dai_link, int stream)
+{
+	int i;
+
+	for (i = 0; i < card->num_links; i++) {
+		if (card->rtd[i].dai_link->no_pcm &&
+			!strcmp(card->rtd[i].dai_link->name, dai_link))
+			return card->rtd[i].pcm->streams[stream].substream;
+	}
+	dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
+
+struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
+		const char *dai_link)
+{
+	int i;
+
+	for (i = 0; i < card->num_links; i++) {
+		if (!strcmp(card->rtd[i].dai_link->name, dai_link))
+			return &card->rtd[i];
+	}
+	dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
+
+static void codec2codec_close_delayed_work(struct work_struct *work)
+{
+	/* Currently nothing to do for c2c links
+	 * Since c2c links are internal nodes in the DAPM graph and
+	 * don't interface with the outside world or application layer
+	 * we don't have to do any special handling on close.
+	 */
+}
+
+#ifdef CONFIG_PM_SLEEP
+/* powers down audio subsystem for suspend */
+int snd_soc_suspend(struct device *dev)
+{
+	struct snd_soc_card *card = dev_get_drvdata(dev);
+	struct snd_soc_codec *codec;
+	int i, j;
+
+	/* If the card is not initialized yet there is nothing to do */
+	if (!card->instantiated)
+		return 0;
+
+	/* Due to the resume being scheduled into a workqueue we could
+	* suspend before that's finished - wait for it to complete.
+	 */
+	snd_power_lock(card->snd_card);
+	snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
+	snd_power_unlock(card->snd_card);
+
+	/* we're going to block userspace touching us until resume completes */
+	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
+
+	/* mute any active DACs */
+	for (i = 0; i < card->num_rtd; i++) {
+
+		if (card->rtd[i].dai_link->ignore_suspend)
+			continue;
+
+		for (j = 0; j < card->rtd[i].num_codecs; j++) {
+			struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
+			struct snd_soc_dai_driver *drv = dai->driver;
+
+			if (drv->ops->digital_mute && dai->playback_active)
+				drv->ops->digital_mute(dai, 1);
+		}
+	}
+
+	/* suspend all pcms */
+	for (i = 0; i < card->num_rtd; i++) {
+		if (card->rtd[i].dai_link->ignore_suspend)
+			continue;
+
+		snd_pcm_suspend_all(card->rtd[i].pcm);
+	}
+
+	if (card->suspend_pre)
+		card->suspend_pre(card);
+
+	for (i = 0; i < card->num_rtd; i++) {
+		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
+
+		if (card->rtd[i].dai_link->ignore_suspend)
+			continue;
+
+		if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
+			cpu_dai->driver->suspend(cpu_dai);
+	}
+
+	/* close any waiting streams */
+	for (i = 0; i < card->num_rtd; i++)
+		flush_delayed_work(&card->rtd[i].delayed_work);
+
+	for (i = 0; i < card->num_rtd; i++) {
+
+		if (card->rtd[i].dai_link->ignore_suspend)
+			continue;
+
+		snd_soc_dapm_stream_event(&card->rtd[i],
+					  SNDRV_PCM_STREAM_PLAYBACK,
+					  SND_SOC_DAPM_STREAM_SUSPEND);
+
+		snd_soc_dapm_stream_event(&card->rtd[i],
+					  SNDRV_PCM_STREAM_CAPTURE,
+					  SND_SOC_DAPM_STREAM_SUSPEND);
+	}
+
+	/* Recheck all endpoints too, their state is affected by suspend */
+	dapm_mark_endpoints_dirty(card);
+	snd_soc_dapm_sync(&card->dapm);
+
+	/* suspend all CODECs */
+	list_for_each_entry(codec, &card->codec_dev_list, card_list) {
+		/* If there are paths active then the CODEC will be held with
+		 * bias _ON and should not be suspended. */
+		if (!codec->suspended) {
+			switch (codec->dapm.bias_level) {
+			case SND_SOC_BIAS_STANDBY:
+				/*
+				 * If the CODEC is capable of idle
+				 * bias off then being in STANDBY
+				 * means it's doing something,
+				 * otherwise fall through.
+				 */
+				if (codec->dapm.idle_bias_off) {
+					dev_dbg(codec->dev,
+						"ASoC: idle_bias_off CODEC on over suspend\n");
+					break;
+				}
+
+			case SND_SOC_BIAS_OFF:
+				if (codec->driver->suspend)
+					codec->driver->suspend(codec);
+				codec->suspended = 1;
+				if (codec->component.regmap)
+					regcache_mark_dirty(codec->component.regmap);
+				/* deactivate pins to sleep state */
+				pinctrl_pm_select_sleep_state(codec->dev);
+				break;
+			default:
+				dev_dbg(codec->dev,
+					"ASoC: CODEC is on over suspend\n");
+				break;
+			}
+		}
+	}
+
+	for (i = 0; i < card->num_rtd; i++) {
+		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
+
+		if (card->rtd[i].dai_link->ignore_suspend)
+			continue;
+
+		if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
+			cpu_dai->driver->suspend(cpu_dai);
+
+		/* deactivate pins to sleep state */
+		pinctrl_pm_select_sleep_state(cpu_dai->dev);
+	}
+
+	if (card->suspend_post)
+		card->suspend_post(card);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_suspend);
+
+/* deferred resume work, so resume can complete before we finished
+ * setting our codec back up, which can be very slow on I2C
+ */
+static void soc_resume_deferred(struct work_struct *work)
+{
+	struct snd_soc_card *card =
+			container_of(work, struct snd_soc_card, deferred_resume_work);
+	struct snd_soc_codec *codec;
+	int i, j;
+
+	/* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
+	 * so userspace apps are blocked from touching us
+	 */
+
+	dev_dbg(card->dev, "ASoC: starting resume work\n");
+
+	/* Bring us up into D2 so that DAPM starts enabling things */
+	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
+
+	if (card->resume_pre)
+		card->resume_pre(card);
+
+	/* resume control bus DAIs */
+	for (i = 0; i < card->num_rtd; i++) {
+		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
+
+		if (card->rtd[i].dai_link->ignore_suspend)
+			continue;
+
+		if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
+			cpu_dai->driver->resume(cpu_dai);
+	}
+
+	list_for_each_entry(codec, &card->codec_dev_list, card_list) {
+		/* If the CODEC was idle over suspend then it will have been
+		 * left with bias OFF or STANDBY and suspended so we must now
+		 * resume.  Otherwise the suspend was suppressed.
+		 */
+		if (codec->suspended) {
+			switch (codec->dapm.bias_level) {
+			case SND_SOC_BIAS_STANDBY:
+			case SND_SOC_BIAS_OFF:
+				if (codec->driver->resume)
+					codec->driver->resume(codec);
+				codec->suspended = 0;
+				break;
+			default:
+				dev_dbg(codec->dev,
+					"ASoC: CODEC was on over suspend\n");
+				break;
+			}
+		}
+	}
+
+	for (i = 0; i < card->num_rtd; i++) {
+
+		if (card->rtd[i].dai_link->ignore_suspend)
+			continue;
+
+		snd_soc_dapm_stream_event(&card->rtd[i],
+					  SNDRV_PCM_STREAM_PLAYBACK,
+					  SND_SOC_DAPM_STREAM_RESUME);
+
+		snd_soc_dapm_stream_event(&card->rtd[i],
+					  SNDRV_PCM_STREAM_CAPTURE,
+					  SND_SOC_DAPM_STREAM_RESUME);
+	}
+
+	/* unmute any active DACs */
+	for (i = 0; i < card->num_rtd; i++) {
+
+		if (card->rtd[i].dai_link->ignore_suspend)
+			continue;
+
+		for (j = 0; j < card->rtd[i].num_codecs; j++) {
+			struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
+			struct snd_soc_dai_driver *drv = dai->driver;
+
+			if (drv->ops->digital_mute && dai->playback_active)
+				drv->ops->digital_mute(dai, 0);
+		}
+	}
+
+	for (i = 0; i < card->num_rtd; i++) {
+		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
+
+		if (card->rtd[i].dai_link->ignore_suspend)
+			continue;
+
+		if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
+			cpu_dai->driver->resume(cpu_dai);
+	}
+
+	if (card->resume_post)
+		card->resume_post(card);
+
+	dev_dbg(card->dev, "ASoC: resume work completed\n");
+
+	/* userspace can access us now we are back as we were before */
+	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
+
+	/* Recheck all endpoints too, their state is affected by suspend */
+	dapm_mark_endpoints_dirty(card);
+	snd_soc_dapm_sync(&card->dapm);
+}
+
+/* powers up audio subsystem after a suspend */
+int snd_soc_resume(struct device *dev)
+{
+	struct snd_soc_card *card = dev_get_drvdata(dev);
+	bool bus_control = false;
+	int i;
+
+	/* If the card is not initialized yet there is nothing to do */
+	if (!card->instantiated)
+		return 0;
+
+	/* activate pins from sleep state */
+	for (i = 0; i < card->num_rtd; i++) {
+		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
+		struct snd_soc_dai **codec_dais = rtd->codec_dais;
+		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+		int j;
+
+		if (cpu_dai->active)
+			pinctrl_pm_select_default_state(cpu_dai->dev);
+
+		for (j = 0; j < rtd->num_codecs; j++) {
+			struct snd_soc_dai *codec_dai = codec_dais[j];
+			if (codec_dai->active)
+				pinctrl_pm_select_default_state(codec_dai->dev);
+		}
+	}
+
+	/*
+	 * DAIs that also act as the control bus master might have other drivers
+	 * hanging off them so need to resume immediately. Other drivers don't
+	 * have that problem and may take a substantial amount of time to resume
+	 * due to I/O costs and anti-pop so handle them out of line.
+	 */
+	for (i = 0; i < card->num_rtd; i++) {
+		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
+		bus_control |= cpu_dai->driver->bus_control;
+	}
+	if (bus_control) {
+		dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
+		soc_resume_deferred(&card->deferred_resume_work);
+	} else {
+		dev_dbg(dev, "ASoC: Scheduling resume work\n");
+		if (!schedule_work(&card->deferred_resume_work))
+			dev_err(dev, "ASoC: resume work item may be lost\n");
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_resume);
+#else
+#define snd_soc_suspend NULL
+#define snd_soc_resume NULL
+#endif
+
+static const struct snd_soc_dai_ops null_dai_ops = {
+};
+
+static struct snd_soc_component *soc_find_component(
+	const struct device_node *of_node, const char *name)
+{
+	struct snd_soc_component *component;
+
+	lockdep_assert_held(&client_mutex);
+
+	list_for_each_entry(component, &component_list, list) {
+		if (of_node) {
+			if (component->dev->of_node == of_node)
+				return component;
+		} else if (strcmp(component->name, name) == 0) {
+			return component;
+		}
+	}
+
+	return NULL;
+}
+
+static struct snd_soc_dai *snd_soc_find_dai(
+	const struct snd_soc_dai_link_component *dlc)
+{
+	struct snd_soc_component *component;
+	struct snd_soc_dai *dai;
+
+	lockdep_assert_held(&client_mutex);
+
+	/* Find CPU DAI from registered DAIs*/
+	list_for_each_entry(component, &component_list, list) {
+		if (dlc->of_node && component->dev->of_node != dlc->of_node)
+			continue;
+		if (dlc->name && strcmp(component->name, dlc->name))
+			continue;
+		list_for_each_entry(dai, &component->dai_list, list) {
+			if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
+				continue;
+
+			return dai;
+		}
+	}
+
+	return NULL;
+}
+
+static int soc_bind_dai_link(struct snd_soc_card *card, int num)
+{
+	struct snd_soc_dai_link *dai_link = &card->dai_link[num];
+	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
+	struct snd_soc_dai_link_component *codecs = dai_link->codecs;
+	struct snd_soc_dai_link_component cpu_dai_component;
+	struct snd_soc_dai **codec_dais = rtd->codec_dais;
+	struct snd_soc_platform *platform;
+	const char *platform_name;
+	int i;
+
+	dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
+
+	cpu_dai_component.name = dai_link->cpu_name;
+	cpu_dai_component.of_node = dai_link->cpu_of_node;
+	cpu_dai_component.dai_name = dai_link->cpu_dai_name;
+	rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
+	if (!rtd->cpu_dai) {
+		dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
+			dai_link->cpu_dai_name);
+		return -EPROBE_DEFER;
+	}
+
+	rtd->num_codecs = dai_link->num_codecs;
+
+	/* Find CODEC from registered CODECs */
+	for (i = 0; i < rtd->num_codecs; i++) {
+		codec_dais[i] = snd_soc_find_dai(&codecs[i]);
+		if (!codec_dais[i]) {
+			dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
+				codecs[i].dai_name);
+			return -EPROBE_DEFER;
+		}
+	}
+
+	/* Single codec links expect codec and codec_dai in runtime data */
+	rtd->codec_dai = codec_dais[0];
+	rtd->codec = rtd->codec_dai->codec;
+
+	/* if there's no platform we match on the empty platform */
+	platform_name = dai_link->platform_name;
+	if (!platform_name && !dai_link->platform_of_node)
+		platform_name = "snd-soc-dummy";
+
+	/* find one from the set of registered platforms */
+	list_for_each_entry(platform, &platform_list, list) {
+		if (dai_link->platform_of_node) {
+			if (platform->dev->of_node !=
+			    dai_link->platform_of_node)
+				continue;
+		} else {
+			if (strcmp(platform->component.name, platform_name))
+				continue;
+		}
+
+		rtd->platform = platform;
+	}
+	if (!rtd->platform) {
+		dev_err(card->dev, "ASoC: platform %s not registered\n",
+			dai_link->platform_name);
+		return -EPROBE_DEFER;
+	}
+
+	card->num_rtd++;
+
+	return 0;
+}
+
+static void soc_remove_component(struct snd_soc_component *component)
+{
+	if (!component->probed)
+		return;
+
+	/* This is a HACK and will be removed soon */
+	if (component->codec)
+		list_del(&component->codec->card_list);
+
+	if (component->remove)
+		component->remove(component);
+
+	snd_soc_dapm_free(snd_soc_component_get_dapm(component));
+
+	soc_cleanup_component_debugfs(component);
+	component->probed = 0;
+	module_put(component->dev->driver->owner);
+}
+
+static void soc_remove_dai(struct snd_soc_dai *dai, int order)
+{
+	int err;
+
+	if (dai && dai->probed &&
+			dai->driver->remove_order == order) {
+		if (dai->driver->remove) {
+			err = dai->driver->remove(dai);
+			if (err < 0)
+				dev_err(dai->dev,
+					"ASoC: failed to remove %s: %d\n",
+					dai->name, err);
+		}
+		dai->probed = 0;
+	}
+}
+
+static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
+{
+	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
+	int i;
+
+	/* unregister the rtd device */
+	if (rtd->dev_registered) {
+		device_unregister(rtd->dev);
+		rtd->dev_registered = 0;
+	}
+
+	/* remove the CODEC DAI */
+	for (i = 0; i < rtd->num_codecs; i++)
+		soc_remove_dai(rtd->codec_dais[i], order);
+
+	soc_remove_dai(rtd->cpu_dai, order);
+}
+
+static void soc_remove_link_components(struct snd_soc_card *card, int num,
+				       int order)
+{
+	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_platform *platform = rtd->platform;
+	struct snd_soc_component *component;
+	int i;
+
+	/* remove the platform */
+	if (platform && platform->component.driver->remove_order == order)
+		soc_remove_component(&platform->component);
+
+	/* remove the CODEC-side CODEC */
+	for (i = 0; i < rtd->num_codecs; i++) {
+		component = rtd->codec_dais[i]->component;
+		if (component->driver->remove_order == order)
+			soc_remove_component(component);
+	}
+
+	/* remove any CPU-side CODEC */
+	if (cpu_dai) {
+		if (cpu_dai->component->driver->remove_order == order)
+			soc_remove_component(cpu_dai->component);
+	}
+}
+
+static void soc_remove_dai_links(struct snd_soc_card *card)
+{
+	int dai, order;
+
+	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
+			order++) {
+		for (dai = 0; dai < card->num_rtd; dai++)
+			soc_remove_link_dais(card, dai, order);
+	}
+
+	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
+			order++) {
+		for (dai = 0; dai < card->num_rtd; dai++)
+			soc_remove_link_components(card, dai, order);
+	}
+
+	card->num_rtd = 0;
+}
+
+static void soc_set_name_prefix(struct snd_soc_card *card,
+				struct snd_soc_component *component)
+{
+	int i;
+
+	if (card->codec_conf == NULL)
+		return;
+
+	for (i = 0; i < card->num_configs; i++) {
+		struct snd_soc_codec_conf *map = &card->codec_conf[i];
+		if (map->of_node && component->dev->of_node != map->of_node)
+			continue;
+		if (map->dev_name && strcmp(component->name, map->dev_name))
+			continue;
+		component->name_prefix = map->name_prefix;
+		break;
+	}
+}
+
+static int soc_probe_component(struct snd_soc_card *card,
+	struct snd_soc_component *component)
+{
+	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
+	struct snd_soc_dai *dai;
+	int ret;
+
+	if (component->probed)
+		return 0;
+
+	component->card = card;
+	dapm->card = card;
+	soc_set_name_prefix(card, component);
+
+	if (!try_module_get(component->dev->driver->owner))
+		return -ENODEV;
+
+	soc_init_component_debugfs(component);
+
+	if (component->dapm_widgets) {
+		ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
+			component->num_dapm_widgets);
+
+		if (ret != 0) {
+			dev_err(component->dev,
+				"Failed to create new controls %d\n", ret);
+			goto err_probe;
+		}
+	}
+
+	list_for_each_entry(dai, &component->dai_list, list) {
+		ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
+		if (ret != 0) {
+			dev_err(component->dev,
+				"Failed to create DAI widgets %d\n", ret);
+			goto err_probe;
+		}
+	}
+
+	if (component->probe) {
+		ret = component->probe(component);
+		if (ret < 0) {
+			dev_err(component->dev,
+				"ASoC: failed to probe component %d\n", ret);
+			goto err_probe;
+		}
+
+		WARN(dapm->idle_bias_off &&
+			dapm->bias_level != SND_SOC_BIAS_OFF,
+			"codec %s can not start from non-off bias with idle_bias_off==1\n",
+			component->name);
+	}
+
+	if (component->controls)
+		snd_soc_add_component_controls(component, component->controls,
+				     component->num_controls);
+	if (component->dapm_routes)
+		snd_soc_dapm_add_routes(dapm, component->dapm_routes,
+					component->num_dapm_routes);
+
+	component->probed = 1;
+	list_add(&dapm->list, &card->dapm_list);
+
+	/* This is a HACK and will be removed soon */
+	if (component->codec)
+		list_add(&component->codec->card_list, &card->codec_dev_list);
+
+	return 0;
+
+err_probe:
+	soc_cleanup_component_debugfs(component);
+	module_put(component->dev->driver->owner);
+
+	return ret;
+}
+
+static void rtd_release(struct device *dev)
+{
+	kfree(dev);
+}
+
+static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
+	const char *name)
+{
+	int ret = 0;
+
+	/* register the rtd device */
+	rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
+	if (!rtd->dev)
+		return -ENOMEM;
+	device_initialize(rtd->dev);
+	rtd->dev->parent = rtd->card->dev;
+	rtd->dev->release = rtd_release;
+	rtd->dev->groups = soc_dev_attr_groups;
+	dev_set_name(rtd->dev, "%s", name);
+	dev_set_drvdata(rtd->dev, rtd);
+	mutex_init(&rtd->pcm_mutex);
+	INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
+	INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
+	INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
+	INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
+	ret = device_add(rtd->dev);
+	if (ret < 0) {
+		/* calling put_device() here to free the rtd->dev */
+		put_device(rtd->dev);
+		dev_err(rtd->card->dev,
+			"ASoC: failed to register runtime device: %d\n", ret);
+		return ret;
+	}
+	rtd->dev_registered = 1;
+	return 0;
+}
+
+static int soc_probe_link_components(struct snd_soc_card *card, int num,
+				     int order)
+{
+	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
+	struct snd_soc_platform *platform = rtd->platform;
+	struct snd_soc_component *component;
+	int i, ret;
+
+	/* probe the CPU-side component, if it is a CODEC */
+	component = rtd->cpu_dai->component;
+	if (component->driver->probe_order == order) {
+		ret = soc_probe_component(card, component);
+		if (ret < 0)
+			return ret;
+	}
+
+	/* probe the CODEC-side components */
+	for (i = 0; i < rtd->num_codecs; i++) {
+		component = rtd->codec_dais[i]->component;
+		if (component->driver->probe_order == order) {
+			ret = soc_probe_component(card, component);
+			if (ret < 0)
+				return ret;
+		}
+	}
+
+	/* probe the platform */
+	if (platform->component.driver->probe_order == order) {
+		ret = soc_probe_component(card, &platform->component);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int soc_probe_dai(struct snd_soc_dai *dai, int order)
+{
+	int ret;
+
+	if (!dai->probed && dai->driver->probe_order == order) {
+		if (dai->driver->probe) {
+			ret = dai->driver->probe(dai);
+			if (ret < 0) {
+				dev_err(dai->dev,
+					"ASoC: failed to probe DAI %s: %d\n",
+					dai->name, ret);
+				return ret;
+			}
+		}
+
+		dai->probed = 1;
+	}
+
+	return 0;
+}
+
+static int soc_link_dai_widgets(struct snd_soc_card *card,
+				struct snd_soc_dai_link *dai_link,
+				struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	struct snd_soc_dapm_widget *play_w, *capture_w;
+	int ret;
+
+	if (rtd->num_codecs > 1)
+		dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
+
+	/* link the DAI widgets */
+	play_w = codec_dai->playback_widget;
+	capture_w = cpu_dai->capture_widget;
+	if (play_w && capture_w) {
+		ret = snd_soc_dapm_new_pcm(card, dai_link->params,
+					   dai_link->num_params, capture_w,
+					   play_w);
+		if (ret != 0) {
+			dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
+				play_w->name, capture_w->name, ret);
+			return ret;
+		}
+	}
+
+	play_w = cpu_dai->playback_widget;
+	capture_w = codec_dai->capture_widget;
+	if (play_w && capture_w) {
+		ret = snd_soc_dapm_new_pcm(card, dai_link->params,
+					   dai_link->num_params, capture_w,
+					   play_w);
+		if (ret != 0) {
+			dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
+				play_w->name, capture_w->name, ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
+{
+	struct snd_soc_dai_link *dai_link = &card->dai_link[num];
+	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	int i, ret;
+
+	dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
+			card->name, num, order);
+
+	/* set default power off timeout */
+	rtd->pmdown_time = pmdown_time;
+
+	ret = soc_probe_dai(cpu_dai, order);
+	if (ret)
+		return ret;
+
+	/* probe the CODEC DAI */
+	for (i = 0; i < rtd->num_codecs; i++) {
+		ret = soc_probe_dai(rtd->codec_dais[i], order);
+		if (ret)
+			return ret;
+	}
+
+	/* complete DAI probe during last probe */
+	if (order != SND_SOC_COMP_ORDER_LAST)
+		return 0;
+
+	/* do machine specific initialization */
+	if (dai_link->init) {
+		ret = dai_link->init(rtd);
+		if (ret < 0) {
+			dev_err(card->dev, "ASoC: failed to init %s: %d\n",
+				dai_link->name, ret);
+			return ret;
+		}
+	}
+
+	if (dai_link->dai_fmt)
+		snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
+
+	ret = soc_post_component_init(rtd, dai_link->name);
+	if (ret)
+		return ret;
+
+#ifdef CONFIG_DEBUG_FS
+	/* add DPCM sysfs entries */
+	if (dai_link->dynamic)
+		soc_dpcm_debugfs_add(rtd);
+#endif
+
+	if (cpu_dai->driver->compress_dai) {
+		/*create compress_device"*/
+		ret = soc_new_compress(rtd, num);
+		if (ret < 0) {
+			dev_err(card->dev, "ASoC: can't create compress %s\n",
+					 dai_link->stream_name);
+			return ret;
+		}
+	} else {
+
+		if (!dai_link->params) {
+			/* create the pcm */
+			ret = soc_new_pcm(rtd, num);
+			if (ret < 0) {
+				dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
+				       dai_link->stream_name, ret);
+				return ret;
+			}
+		} else {
+			INIT_DELAYED_WORK(&rtd->delayed_work,
+						codec2codec_close_delayed_work);
+
+			/* link the DAI widgets */
+			ret = soc_link_dai_widgets(card, dai_link, rtd);
+			if (ret)
+				return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
+{
+	struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
+	struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
+	const char *name = aux_dev->codec_name;
+
+	rtd->component = soc_find_component(aux_dev->codec_of_node, name);
+	if (!rtd->component) {
+		if (aux_dev->codec_of_node)
+			name = of_node_full_name(aux_dev->codec_of_node);
+
+		dev_err(card->dev, "ASoC: %s not registered\n", name);
+		return -EPROBE_DEFER;
+	}
+
+	/*
+	 * Some places still reference rtd->codec, so we have to keep that
+	 * initialized if the component is a CODEC. Once all those references
+	 * have been removed, this code can be removed as well.
+	 */
+	 rtd->codec = rtd->component->codec;
+
+	return 0;
+}
+
+static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
+{
+	struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
+	struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
+	int ret;
+
+	ret = soc_probe_component(card, rtd->component);
+	if (ret < 0)
+		return ret;
+
+	/* do machine specific initialization */
+	if (aux_dev->init) {
+		ret = aux_dev->init(rtd->component);
+		if (ret < 0) {
+			dev_err(card->dev, "ASoC: failed to init %s: %d\n",
+				aux_dev->name, ret);
+			return ret;
+		}
+	}
+
+	return soc_post_component_init(rtd, aux_dev->name);
+}
+
+static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
+{
+	struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
+	struct snd_soc_component *component = rtd->component;
+
+	/* unregister the rtd device */
+	if (rtd->dev_registered) {
+		device_unregister(rtd->dev);
+		rtd->dev_registered = 0;
+	}
+
+	if (component && component->probed)
+		soc_remove_component(component);
+}
+
+static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
+{
+	int ret;
+
+	if (codec->cache_init)
+		return 0;
+
+	ret = snd_soc_cache_init(codec);
+	if (ret < 0) {
+		dev_err(codec->dev,
+			"ASoC: Failed to set cache compression type: %d\n",
+			ret);
+		return ret;
+	}
+	codec->cache_init = 1;
+	return 0;
+}
+
+/**
+ * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
+ * @rtd: The runtime for which the DAI link format should be changed
+ * @dai_fmt: The new DAI link format
+ *
+ * This function updates the DAI link format for all DAIs connected to the DAI
+ * link for the specified runtime.
+ *
+ * Note: For setups with a static format set the dai_fmt field in the
+ * corresponding snd_dai_link struct instead of using this function.
+ *
+ * Returns 0 on success, otherwise a negative error code.
+ */
+int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
+	unsigned int dai_fmt)
+{
+	struct snd_soc_dai **codec_dais = rtd->codec_dais;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	unsigned int i;
+	int ret;
+
+	for (i = 0; i < rtd->num_codecs; i++) {
+		struct snd_soc_dai *codec_dai = codec_dais[i];
+
+		ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
+		if (ret != 0 && ret != -ENOTSUPP) {
+			dev_warn(codec_dai->dev,
+				 "ASoC: Failed to set DAI format: %d\n", ret);
+			return ret;
+		}
+	}
+
+	/* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
+	if (cpu_dai->codec) {
+		unsigned int inv_dai_fmt;
+
+		inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
+		switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+		case SND_SOC_DAIFMT_CBM_CFM:
+			inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
+			break;
+		case SND_SOC_DAIFMT_CBM_CFS:
+			inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
+			break;
+		case SND_SOC_DAIFMT_CBS_CFM:
+			inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
+			break;
+		case SND_SOC_DAIFMT_CBS_CFS:
+			inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
+			break;
+		}
+
+		dai_fmt = inv_dai_fmt;
+	}
+
+	ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
+	if (ret != 0 && ret != -ENOTSUPP) {
+		dev_warn(cpu_dai->dev,
+			 "ASoC: Failed to set DAI format: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
+
+static int snd_soc_instantiate_card(struct snd_soc_card *card)
+{
+	struct snd_soc_codec *codec;
+	int ret, i, order;
+
+	mutex_lock(&client_mutex);
+	mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
+
+	/* bind DAIs */
+	for (i = 0; i < card->num_links; i++) {
+		ret = soc_bind_dai_link(card, i);
+		if (ret != 0)
+			goto base_error;
+	}
+
+	/* bind aux_devs too */
+	for (i = 0; i < card->num_aux_devs; i++) {
+		ret = soc_bind_aux_dev(card, i);
+		if (ret != 0)
+			goto base_error;
+	}
+
+	/* initialize the register cache for each available codec */
+	list_for_each_entry(codec, &codec_list, list) {
+		if (codec->cache_init)
+			continue;
+		ret = snd_soc_init_codec_cache(codec);
+		if (ret < 0)
+			goto base_error;
+	}
+
+	/* card bind complete so register a sound card */
+	ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
+			card->owner, 0, &card->snd_card);
+	if (ret < 0) {
+		dev_err(card->dev,
+			"ASoC: can't create sound card for card %s: %d\n",
+			card->name, ret);
+		goto base_error;
+	}
+
+	soc_init_card_debugfs(card);
+
+	card->dapm.bias_level = SND_SOC_BIAS_OFF;
+	card->dapm.dev = card->dev;
+	card->dapm.card = card;
+	list_add(&card->dapm.list, &card->dapm_list);
+
+#ifdef CONFIG_DEBUG_FS
+	snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+	/* deferred resume work */
+	INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
+#endif
+
+	if (card->dapm_widgets)
+		snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
+					  card->num_dapm_widgets);
+
+	if (card->of_dapm_widgets)
+		snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
+					  card->num_of_dapm_widgets);
+
+	/* initialise the sound card only once */
+	if (card->probe) {
+		ret = card->probe(card);
+		if (ret < 0)
+			goto card_probe_error;
+	}
+
+	/* probe all components used by DAI links on this card */
+	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
+			order++) {
+		for (i = 0; i < card->num_links; i++) {
+			ret = soc_probe_link_components(card, i, order);
+			if (ret < 0) {
+				dev_err(card->dev,
+					"ASoC: failed to instantiate card %d\n",
+					ret);
+				goto probe_dai_err;
+			}
+		}
+	}
+
+	/* probe all DAI links on this card */
+	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
+			order++) {
+		for (i = 0; i < card->num_links; i++) {
+			ret = soc_probe_link_dais(card, i, order);
+			if (ret < 0) {
+				dev_err(card->dev,
+					"ASoC: failed to instantiate card %d\n",
+					ret);
+				goto probe_dai_err;
+			}
+		}
+	}
+
+	for (i = 0; i < card->num_aux_devs; i++) {
+		ret = soc_probe_aux_dev(card, i);
+		if (ret < 0) {
+			dev_err(card->dev,
+				"ASoC: failed to add auxiliary devices %d\n",
+				ret);
+			goto probe_aux_dev_err;
+		}
+	}
+
+	snd_soc_dapm_link_dai_widgets(card);
+	snd_soc_dapm_connect_dai_link_widgets(card);
+
+	if (card->controls)
+		snd_soc_add_card_controls(card, card->controls, card->num_controls);
+
+	if (card->dapm_routes)
+		snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
+					card->num_dapm_routes);
+
+	if (card->of_dapm_routes)
+		snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
+					card->num_of_dapm_routes);
+
+	snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
+		 "%s", card->name);
+	snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
+		 "%s", card->long_name ? card->long_name : card->name);
+	snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
+		 "%s", card->driver_name ? card->driver_name : card->name);
+	for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
+		switch (card->snd_card->driver[i]) {
+		case '_':
+		case '-':
+		case '\0':
+			break;
+		default:
+			if (!isalnum(card->snd_card->driver[i]))
+				card->snd_card->driver[i] = '_';
+			break;
+		}
+	}
+
+	if (card->late_probe) {
+		ret = card->late_probe(card);
+		if (ret < 0) {
+			dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
+				card->name, ret);
+			goto probe_aux_dev_err;
+		}
+	}
+
+	snd_soc_dapm_new_widgets(card);
+
+	ret = snd_card_register(card->snd_card);
+	if (ret < 0) {
+		dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
+				ret);
+		goto probe_aux_dev_err;
+	}
+
+	card->instantiated = 1;
+	snd_soc_dapm_sync(&card->dapm);
+	mutex_unlock(&card->mutex);
+	mutex_unlock(&client_mutex);
+
+	return 0;
+
+probe_aux_dev_err:
+	for (i = 0; i < card->num_aux_devs; i++)
+		soc_remove_aux_dev(card, i);
+
+probe_dai_err:
+	soc_remove_dai_links(card);
+
+card_probe_error:
+	if (card->remove)
+		card->remove(card);
+
+	soc_cleanup_card_debugfs(card);
+	snd_card_free(card->snd_card);
+
+base_error:
+	mutex_unlock(&card->mutex);
+	mutex_unlock(&client_mutex);
+
+	return ret;
+}
+
+/* probes a new socdev */
+static int soc_probe(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+	/*
+	 * no card, so machine driver should be registering card
+	 * we should not be here in that case so ret error
+	 */
+	if (!card)
+		return -EINVAL;
+
+	dev_warn(&pdev->dev,
+		 "ASoC: machine %s should use snd_soc_register_card()\n",
+		 card->name);
+
+	/* Bodge while we unpick instantiation */
+	card->dev = &pdev->dev;
+
+	return snd_soc_register_card(card);
+}
+
+static int soc_cleanup_card_resources(struct snd_soc_card *card)
+{
+	int i;
+
+	/* make sure any delayed work runs */
+	for (i = 0; i < card->num_rtd; i++) {
+		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
+		flush_delayed_work(&rtd->delayed_work);
+	}
+
+	/* remove auxiliary devices */
+	for (i = 0; i < card->num_aux_devs; i++)
+		soc_remove_aux_dev(card, i);
+
+	/* remove and free each DAI */
+	soc_remove_dai_links(card);
+
+	soc_cleanup_card_debugfs(card);
+
+	/* remove the card */
+	if (card->remove)
+		card->remove(card);
+
+	snd_soc_dapm_free(&card->dapm);
+
+	snd_card_free(card->snd_card);
+	return 0;
+
+}
+
+/* removes a socdev */
+static int soc_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+	snd_soc_unregister_card(card);
+	return 0;
+}
+
+int snd_soc_poweroff(struct device *dev)
+{
+	struct snd_soc_card *card = dev_get_drvdata(dev);
+	int i;
+
+	if (!card->instantiated)
+		return 0;
+
+	/* Flush out pmdown_time work - we actually do want to run it
+	 * now, we're shutting down so no imminent restart. */
+	for (i = 0; i < card->num_rtd; i++) {
+		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
+		flush_delayed_work(&rtd->delayed_work);
+	}
+
+	snd_soc_dapm_shutdown(card);
+
+	/* deactivate pins to sleep state */
+	for (i = 0; i < card->num_rtd; i++) {
+		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
+		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+		int j;
+
+		pinctrl_pm_select_sleep_state(cpu_dai->dev);
+		for (j = 0; j < rtd->num_codecs; j++) {
+			struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
+			pinctrl_pm_select_sleep_state(codec_dai->dev);
+		}
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_poweroff);
+
+const struct dev_pm_ops snd_soc_pm_ops = {
+	.suspend = snd_soc_suspend,
+	.resume = snd_soc_resume,
+	.freeze = snd_soc_suspend,
+	.thaw = snd_soc_resume,
+	.poweroff = snd_soc_poweroff,
+	.restore = snd_soc_resume,
+};
+EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
+
+/* ASoC platform driver */
+static struct platform_driver soc_driver = {
+	.driver		= {
+		.name		= "soc-audio",
+		.pm		= &snd_soc_pm_ops,
+	},
+	.probe		= soc_probe,
+	.remove		= soc_remove,
+};
+
+/**
+ * snd_soc_cnew - create new control
+ * @_template: control template
+ * @data: control private data
+ * @long_name: control long name
+ * @prefix: control name prefix
+ *
+ * Create a new mixer control from a template control.
+ *
+ * Returns 0 for success, else error.
+ */
+struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
+				  void *data, const char *long_name,
+				  const char *prefix)
+{
+	struct snd_kcontrol_new template;
+	struct snd_kcontrol *kcontrol;
+	char *name = NULL;
+
+	memcpy(&template, _template, sizeof(template));
+	template.index = 0;
+
+	if (!long_name)
+		long_name = template.name;
+
+	if (prefix) {
+		name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
+		if (!name)
+			return NULL;
+
+		template.name = name;
+	} else {
+		template.name = long_name;
+	}
+
+	kcontrol = snd_ctl_new1(&template, data);
+
+	kfree(name);
+
+	return kcontrol;
+}
+EXPORT_SYMBOL_GPL(snd_soc_cnew);
+
+static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
+	const struct snd_kcontrol_new *controls, int num_controls,
+	const char *prefix, void *data)
+{
+	int err, i;
+
+	for (i = 0; i < num_controls; i++) {
+		const struct snd_kcontrol_new *control = &controls[i];
+		err = snd_ctl_add(card, snd_soc_cnew(control, data,
+						     control->name, prefix));
+		if (err < 0) {
+			dev_err(dev, "ASoC: Failed to add %s: %d\n",
+				control->name, err);
+			return err;
+		}
+	}
+
+	return 0;
+}
+
+struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
+					       const char *name)
+{
+	struct snd_card *card = soc_card->snd_card;
+	struct snd_kcontrol *kctl;
+
+	if (unlikely(!name))
+		return NULL;
+
+	list_for_each_entry(kctl, &card->controls, list)
+		if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
+			return kctl;
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
+
+/**
+ * snd_soc_add_component_controls - Add an array of controls to a component.
+ *
+ * @component: Component to add controls to
+ * @controls: Array of controls to add
+ * @num_controls: Number of elements in the array
+ *
+ * Return: 0 for success, else error.
+ */
+int snd_soc_add_component_controls(struct snd_soc_component *component,
+	const struct snd_kcontrol_new *controls, unsigned int num_controls)
+{
+	struct snd_card *card = component->card->snd_card;
+
+	return snd_soc_add_controls(card, component->dev, controls,
+			num_controls, component->name_prefix, component);
+}
+EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
+
+/**
+ * snd_soc_add_codec_controls - add an array of controls to a codec.
+ * Convenience function to add a list of controls. Many codecs were
+ * duplicating this code.
+ *
+ * @codec: codec to add controls to
+ * @controls: array of controls to add
+ * @num_controls: number of elements in the array
+ *
+ * Return 0 for success, else error.
+ */
+int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
+	const struct snd_kcontrol_new *controls, unsigned int num_controls)
+{
+	return snd_soc_add_component_controls(&codec->component, controls,
+		num_controls);
+}
+EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
+
+/**
+ * snd_soc_add_platform_controls - add an array of controls to a platform.
+ * Convenience function to add a list of controls.
+ *
+ * @platform: platform to add controls to
+ * @controls: array of controls to add
+ * @num_controls: number of elements in the array
+ *
+ * Return 0 for success, else error.
+ */
+int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
+	const struct snd_kcontrol_new *controls, unsigned int num_controls)
+{
+	return snd_soc_add_component_controls(&platform->component, controls,
+		num_controls);
+}
+EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
+
+/**
+ * snd_soc_add_card_controls - add an array of controls to a SoC card.
+ * Convenience function to add a list of controls.
+ *
+ * @soc_card: SoC card to add controls to
+ * @controls: array of controls to add
+ * @num_controls: number of elements in the array
+ *
+ * Return 0 for success, else error.
+ */
+int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
+	const struct snd_kcontrol_new *controls, int num_controls)
+{
+	struct snd_card *card = soc_card->snd_card;
+
+	return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
+			NULL, soc_card);
+}
+EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
+
+/**
+ * snd_soc_add_dai_controls - add an array of controls to a DAI.
+ * Convienience function to add a list of controls.
+ *
+ * @dai: DAI to add controls to
+ * @controls: array of controls to add
+ * @num_controls: number of elements in the array
+ *
+ * Return 0 for success, else error.
+ */
+int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
+	const struct snd_kcontrol_new *controls, int num_controls)
+{
+	struct snd_card *card = dai->component->card->snd_card;
+
+	return snd_soc_add_controls(card, dai->dev, controls, num_controls,
+			NULL, dai);
+}
+EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
+
+/**
+ * snd_soc_dai_set_sysclk - configure DAI system or master clock.
+ * @dai: DAI
+ * @clk_id: DAI specific clock ID
+ * @freq: new clock frequency in Hz
+ * @dir: new clock direction - input/output.
+ *
+ * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
+ */
+int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
+	unsigned int freq, int dir)
+{
+	if (dai->driver && dai->driver->ops->set_sysclk)
+		return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
+	else if (dai->codec && dai->codec->driver->set_sysclk)
+		return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
+						      freq, dir);
+	else
+		return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
+
+/**
+ * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
+ * @codec: CODEC
+ * @clk_id: DAI specific clock ID
+ * @source: Source for the clock
+ * @freq: new clock frequency in Hz
+ * @dir: new clock direction - input/output.
+ *
+ * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
+ */
+int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
+			     int source, unsigned int freq, int dir)
+{
+	if (codec->driver->set_sysclk)
+		return codec->driver->set_sysclk(codec, clk_id, source,
+						 freq, dir);
+	else
+		return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
+
+/**
+ * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
+ * @dai: DAI
+ * @div_id: DAI specific clock divider ID
+ * @div: new clock divisor.
+ *
+ * Configures the clock dividers. This is used to derive the best DAI bit and
+ * frame clocks from the system or master clock. It's best to set the DAI bit
+ * and frame clocks as low as possible to save system power.
+ */
+int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
+	int div_id, int div)
+{
+	if (dai->driver && dai->driver->ops->set_clkdiv)
+		return dai->driver->ops->set_clkdiv(dai, div_id, div);
+	else
+		return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
+
+/**
+ * snd_soc_dai_set_pll - configure DAI PLL.
+ * @dai: DAI
+ * @pll_id: DAI specific PLL ID
+ * @source: DAI specific source for the PLL
+ * @freq_in: PLL input clock frequency in Hz
+ * @freq_out: requested PLL output clock frequency in Hz
+ *
+ * Configures and enables PLL to generate output clock based on input clock.
+ */
+int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
+	unsigned int freq_in, unsigned int freq_out)
+{
+	if (dai->driver && dai->driver->ops->set_pll)
+		return dai->driver->ops->set_pll(dai, pll_id, source,
+					 freq_in, freq_out);
+	else if (dai->codec && dai->codec->driver->set_pll)
+		return dai->codec->driver->set_pll(dai->codec, pll_id, source,
+						   freq_in, freq_out);
+	else
+		return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
+
+/*
+ * snd_soc_codec_set_pll - configure codec PLL.
+ * @codec: CODEC
+ * @pll_id: DAI specific PLL ID
+ * @source: DAI specific source for the PLL
+ * @freq_in: PLL input clock frequency in Hz
+ * @freq_out: requested PLL output clock frequency in Hz
+ *
+ * Configures and enables PLL to generate output clock based on input clock.
+ */
+int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
+			  unsigned int freq_in, unsigned int freq_out)
+{
+	if (codec->driver->set_pll)
+		return codec->driver->set_pll(codec, pll_id, source,
+					      freq_in, freq_out);
+	else
+		return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
+
+/**
+ * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
+ * @dai: DAI
+ * @ratio Ratio of BCLK to Sample rate.
+ *
+ * Configures the DAI for a preset BCLK to sample rate ratio.
+ */
+int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
+{
+	if (dai->driver && dai->driver->ops->set_bclk_ratio)
+		return dai->driver->ops->set_bclk_ratio(dai, ratio);
+	else
+		return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
+
+/**
+ * snd_soc_dai_set_fmt - configure DAI hardware audio format.
+ * @dai: DAI
+ * @fmt: SND_SOC_DAIFMT_ format value.
+ *
+ * Configures the DAI hardware format and clocking.
+ */
+int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	if (dai->driver == NULL)
+		return -EINVAL;
+	if (dai->driver->ops->set_fmt == NULL)
+		return -ENOTSUPP;
+	return dai->driver->ops->set_fmt(dai, fmt);
+}
+EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
+
+/**
+ * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
+ * @slots: Number of slots in use.
+ * @tx_mask: bitmask representing active TX slots.
+ * @rx_mask: bitmask representing active RX slots.
+ *
+ * Generates the TDM tx and rx slot default masks for DAI.
+ */
+static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
+					  unsigned int *tx_mask,
+					  unsigned int *rx_mask)
+{
+	if (*tx_mask || *rx_mask)
+		return 0;
+
+	if (!slots)
+		return -EINVAL;
+
+	*tx_mask = (1 << slots) - 1;
+	*rx_mask = (1 << slots) - 1;
+
+	return 0;
+}
+
+/**
+ * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
+ * @dai: The DAI to configure
+ * @tx_mask: bitmask representing active TX slots.
+ * @rx_mask: bitmask representing active RX slots.
+ * @slots: Number of slots in use.
+ * @slot_width: Width in bits for each slot.
+ *
+ * This function configures the specified DAI for TDM operation. @slot contains
+ * the total number of slots of the TDM stream and @slot_with the width of each
+ * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
+ * active slots of the TDM stream for the specified DAI, i.e. which slots the
+ * DAI should write to or read from. If a bit is set the corresponding slot is
+ * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
+ * the first slot, bit 1 to the second slot and so on. The first active slot
+ * maps to the first channel of the DAI, the second active slot to the second
+ * channel and so on.
+ *
+ * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
+ * @rx_mask and @slot_width will be ignored.
+ *
+ * Returns 0 on success, a negative error code otherwise.
+ */
+int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
+	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
+{
+	if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
+		dai->driver->ops->xlate_tdm_slot_mask(slots,
+						&tx_mask, &rx_mask);
+	else
+		snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
+
+	dai->tx_mask = tx_mask;
+	dai->rx_mask = rx_mask;
+
+	if (dai->driver && dai->driver->ops->set_tdm_slot)
+		return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
+				slots, slot_width);
+	else
+		return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
+
+/**
+ * snd_soc_dai_set_channel_map - configure DAI audio channel map
+ * @dai: DAI
+ * @tx_num: how many TX channels
+ * @tx_slot: pointer to an array which imply the TX slot number channel
+ *           0~num-1 uses
+ * @rx_num: how many RX channels
+ * @rx_slot: pointer to an array which imply the RX slot number channel
+ *           0~num-1 uses
+ *
+ * configure the relationship between channel number and TDM slot number.
+ */
+int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
+	unsigned int tx_num, unsigned int *tx_slot,
+	unsigned int rx_num, unsigned int *rx_slot)
+{
+	if (dai->driver && dai->driver->ops->set_channel_map)
+		return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
+			rx_num, rx_slot);
+	else
+		return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
+
+/**
+ * snd_soc_dai_set_tristate - configure DAI system or master clock.
+ * @dai: DAI
+ * @tristate: tristate enable
+ *
+ * Tristates the DAI so that others can use it.
+ */
+int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
+{
+	if (dai->driver && dai->driver->ops->set_tristate)
+		return dai->driver->ops->set_tristate(dai, tristate);
+	else
+		return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
+
+/**
+ * snd_soc_dai_digital_mute - configure DAI system or master clock.
+ * @dai: DAI
+ * @mute: mute enable
+ * @direction: stream to mute
+ *
+ * Mutes the DAI DAC.
+ */
+int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
+			     int direction)
+{
+	if (!dai->driver)
+		return -ENOTSUPP;
+
+	if (dai->driver->ops->mute_stream)
+		return dai->driver->ops->mute_stream(dai, mute, direction);
+	else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
+		 dai->driver->ops->digital_mute)
+		return dai->driver->ops->digital_mute(dai, mute);
+	else
+		return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
+
+static int snd_soc_init_multicodec(struct snd_soc_card *card,
+				   struct snd_soc_dai_link *dai_link)
+{
+	/* Legacy codec/codec_dai link is a single entry in multicodec */
+	if (dai_link->codec_name || dai_link->codec_of_node ||
+	    dai_link->codec_dai_name) {
+		dai_link->num_codecs = 1;
+
+		dai_link->codecs = devm_kzalloc(card->dev,
+				sizeof(struct snd_soc_dai_link_component),
+				GFP_KERNEL);
+		if (!dai_link->codecs)
+			return -ENOMEM;
+
+		dai_link->codecs[0].name = dai_link->codec_name;
+		dai_link->codecs[0].of_node = dai_link->codec_of_node;
+		dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
+	}
+
+	if (!dai_link->codecs) {
+		dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/**
+ * snd_soc_register_card - Register a card with the ASoC core
+ *
+ * @card: Card to register
+ *
+ */
+int snd_soc_register_card(struct snd_soc_card *card)
+{
+	int i, j, ret;
+
+	if (!card->name || !card->dev)
+		return -EINVAL;
+
+	for (i = 0; i < card->num_links; i++) {
+		struct snd_soc_dai_link *link = &card->dai_link[i];
+
+		ret = snd_soc_init_multicodec(card, link);
+		if (ret) {
+			dev_err(card->dev, "ASoC: failed to init multicodec\n");
+			return ret;
+		}
+
+		for (j = 0; j < link->num_codecs; j++) {
+			/*
+			 * Codec must be specified by 1 of name or OF node,
+			 * not both or neither.
+			 */
+			if (!!link->codecs[j].name ==
+			    !!link->codecs[j].of_node) {
+				dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
+					link->name);
+				return -EINVAL;
+			}
+			/* Codec DAI name must be specified */
+			if (!link->codecs[j].dai_name) {
+				dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
+					link->name);
+				return -EINVAL;
+			}
+		}
+
+		/*
+		 * Platform may be specified by either name or OF node, but
+		 * can be left unspecified, and a dummy platform will be used.
+		 */
+		if (link->platform_name && link->platform_of_node) {
+			dev_err(card->dev,
+				"ASoC: Both platform name/of_node are set for %s\n",
+				link->name);
+			return -EINVAL;
+		}
+
+		/*
+		 * CPU device may be specified by either name or OF node, but
+		 * can be left unspecified, and will be matched based on DAI
+		 * name alone..
+		 */
+		if (link->cpu_name && link->cpu_of_node) {
+			dev_err(card->dev,
+				"ASoC: Neither/both cpu name/of_node are set for %s\n",
+				link->name);
+			return -EINVAL;
+		}
+		/*
+		 * At least one of CPU DAI name or CPU device name/node must be
+		 * specified
+		 */
+		if (!link->cpu_dai_name &&
+		    !(link->cpu_name || link->cpu_of_node)) {
+			dev_err(card->dev,
+				"ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
+				link->name);
+			return -EINVAL;
+		}
+	}
+
+	dev_set_drvdata(card->dev, card);
+
+	snd_soc_initialize_card_lists(card);
+
+	card->rtd = devm_kzalloc(card->dev,
+				 sizeof(struct snd_soc_pcm_runtime) *
+				 (card->num_links + card->num_aux_devs),
+				 GFP_KERNEL);
+	if (card->rtd == NULL)
+		return -ENOMEM;
+	card->num_rtd = 0;
+	card->rtd_aux = &card->rtd[card->num_links];
+
+	for (i = 0; i < card->num_links; i++) {
+		card->rtd[i].card = card;
+		card->rtd[i].dai_link = &card->dai_link[i];
+		card->rtd[i].codec_dais = devm_kzalloc(card->dev,
+					sizeof(struct snd_soc_dai *) *
+					(card->rtd[i].dai_link->num_codecs),
+					GFP_KERNEL);
+		if (card->rtd[i].codec_dais == NULL)
+			return -ENOMEM;
+	}
+
+	for (i = 0; i < card->num_aux_devs; i++)
+		card->rtd_aux[i].card = card;
+
+	INIT_LIST_HEAD(&card->dapm_dirty);
+	card->instantiated = 0;
+	mutex_init(&card->mutex);
+	mutex_init(&card->dapm_mutex);
+
+	ret = snd_soc_instantiate_card(card);
+	if (ret != 0)
+		return ret;
+
+	/* deactivate pins to sleep state */
+	for (i = 0; i < card->num_rtd; i++) {
+		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
+		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+		int j;
+
+		for (j = 0; j < rtd->num_codecs; j++) {
+			struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
+			if (!codec_dai->active)
+				pinctrl_pm_select_sleep_state(codec_dai->dev);
+		}
+
+		if (!cpu_dai->active)
+			pinctrl_pm_select_sleep_state(cpu_dai->dev);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_register_card);
+
+/**
+ * snd_soc_unregister_card - Unregister a card with the ASoC core
+ *
+ * @card: Card to unregister
+ *
+ */
+int snd_soc_unregister_card(struct snd_soc_card *card)
+{
+	if (card->instantiated) {
+		card->instantiated = false;
+		snd_soc_dapm_shutdown(card);
+		soc_cleanup_card_resources(card);
+		dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
+
+/*
+ * Simplify DAI link configuration by removing ".-1" from device names
+ * and sanitizing names.
+ */
+static char *fmt_single_name(struct device *dev, int *id)
+{
+	char *found, name[NAME_SIZE];
+	int id1, id2;
+
+	if (dev_name(dev) == NULL)
+		return NULL;
+
+	strlcpy(name, dev_name(dev), NAME_SIZE);
+
+	/* are we a "%s.%d" name (platform and SPI components) */
+	found = strstr(name, dev->driver->name);
+	if (found) {
+		/* get ID */
+		if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
+
+			/* discard ID from name if ID == -1 */
+			if (*id == -1)
+				found[strlen(dev->driver->name)] = '\0';
+		}
+
+	} else {
+		/* I2C component devices are named "bus-addr"  */
+		if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
+			char tmp[NAME_SIZE];
+
+			/* create unique ID number from I2C addr and bus */
+			*id = ((id1 & 0xffff) << 16) + id2;
+
+			/* sanitize component name for DAI link creation */
+			snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
+			strlcpy(name, tmp, NAME_SIZE);
+		} else
+			*id = 0;
+	}
+
+	return kstrdup(name, GFP_KERNEL);
+}
+
+/*
+ * Simplify DAI link naming for single devices with multiple DAIs by removing
+ * any ".-1" and using the DAI name (instead of device name).
+ */
+static inline char *fmt_multiple_name(struct device *dev,
+		struct snd_soc_dai_driver *dai_drv)
+{
+	if (dai_drv->name == NULL) {
+		dev_err(dev,
+			"ASoC: error - multiple DAI %s registered with no name\n",
+			dev_name(dev));
+		return NULL;
+	}
+
+	return kstrdup(dai_drv->name, GFP_KERNEL);
+}
+
+/**
+ * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
+ *
+ * @component: The component for which the DAIs should be unregistered
+ */
+static void snd_soc_unregister_dais(struct snd_soc_component *component)
+{
+	struct snd_soc_dai *dai, *_dai;
+
+	list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
+		dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
+			dai->name);
+		list_del(&dai->list);
+		kfree(dai->name);
+		kfree(dai);
+	}
+}
+
+/**
+ * snd_soc_register_dais - Register a DAI with the ASoC core
+ *
+ * @component: The component the DAIs are registered for
+ * @dai_drv: DAI driver to use for the DAIs
+ * @count: Number of DAIs
+ * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
+ *                     parent's name.
+ */
+static int snd_soc_register_dais(struct snd_soc_component *component,
+	struct snd_soc_dai_driver *dai_drv, size_t count,
+	bool legacy_dai_naming)
+{
+	struct device *dev = component->dev;
+	struct snd_soc_dai *dai;
+	unsigned int i;
+	int ret;
+
+	dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
+
+	component->dai_drv = dai_drv;
+	component->num_dai = count;
+
+	for (i = 0; i < count; i++) {
+
+		dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
+		if (dai == NULL) {
+			ret = -ENOMEM;
+			goto err;
+		}
+
+		/*
+		 * Back in the old days when we still had component-less DAIs,
+		 * instead of having a static name, component-less DAIs would
+		 * inherit the name of the parent device so it is possible to
+		 * register multiple instances of the DAI. We still need to keep
+		 * the same naming style even though those DAIs are not
+		 * component-less anymore.
+		 */
+		if (count == 1 && legacy_dai_naming) {
+			dai->name = fmt_single_name(dev, &dai->id);
+		} else {
+			dai->name = fmt_multiple_name(dev, &dai_drv[i]);
+			if (dai_drv[i].id)
+				dai->id = dai_drv[i].id;
+			else
+				dai->id = i;
+		}
+		if (dai->name == NULL) {
+			kfree(dai);
+			ret = -ENOMEM;
+			goto err;
+		}
+
+		dai->component = component;
+		dai->dev = dev;
+		dai->driver = &dai_drv[i];
+		if (!dai->driver->ops)
+			dai->driver->ops = &null_dai_ops;
+
+		list_add(&dai->list, &component->dai_list);
+
+		dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
+	}
+
+	return 0;
+
+err:
+	snd_soc_unregister_dais(component);
+
+	return ret;
+}
+
+static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
+	enum snd_soc_dapm_type type, int subseq)
+{
+	struct snd_soc_component *component = dapm->component;
+
+	component->driver->seq_notifier(component, type, subseq);
+}
+
+static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
+	int event)
+{
+	struct snd_soc_component *component = dapm->component;
+
+	return component->driver->stream_event(component, event);
+}
+
+static int snd_soc_component_initialize(struct snd_soc_component *component,
+	const struct snd_soc_component_driver *driver, struct device *dev)
+{
+	struct snd_soc_dapm_context *dapm;
+
+	component->name = fmt_single_name(dev, &component->id);
+	if (!component->name) {
+		dev_err(dev, "ASoC: Failed to allocate name\n");
+		return -ENOMEM;
+	}
+
+	component->dev = dev;
+	component->driver = driver;
+	component->probe = component->driver->probe;
+	component->remove = component->driver->remove;
+
+	if (!component->dapm_ptr)
+		component->dapm_ptr = &component->dapm;
+
+	dapm = component->dapm_ptr;
+	dapm->dev = dev;
+	dapm->component = component;
+	dapm->bias_level = SND_SOC_BIAS_OFF;
+	dapm->idle_bias_off = true;
+	if (driver->seq_notifier)
+		dapm->seq_notifier = snd_soc_component_seq_notifier;
+	if (driver->stream_event)
+		dapm->stream_event = snd_soc_component_stream_event;
+
+	component->controls = driver->controls;
+	component->num_controls = driver->num_controls;
+	component->dapm_widgets = driver->dapm_widgets;
+	component->num_dapm_widgets = driver->num_dapm_widgets;
+	component->dapm_routes = driver->dapm_routes;
+	component->num_dapm_routes = driver->num_dapm_routes;
+
+	INIT_LIST_HEAD(&component->dai_list);
+	mutex_init(&component->io_mutex);
+
+	return 0;
+}
+
+static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
+{
+	int val_bytes = regmap_get_val_bytes(component->regmap);
+
+	/* Errors are legitimate for non-integer byte multiples */
+	if (val_bytes > 0)
+		component->val_bytes = val_bytes;
+}
+
+#ifdef CONFIG_REGMAP
+
+/**
+ * snd_soc_component_init_regmap() - Initialize regmap instance for the component
+ * @component: The component for which to initialize the regmap instance
+ * @regmap: The regmap instance that should be used by the component
+ *
+ * This function allows deferred assignment of the regmap instance that is
+ * associated with the component. Only use this if the regmap instance is not
+ * yet ready when the component is registered. The function must also be called
+ * before the first IO attempt of the component.
+ */
+void snd_soc_component_init_regmap(struct snd_soc_component *component,
+	struct regmap *regmap)
+{
+	component->regmap = regmap;
+	snd_soc_component_setup_regmap(component);
+}
+EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
+
+/**
+ * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
+ * @component: The component for which to de-initialize the regmap instance
+ *
+ * Calls regmap_exit() on the regmap instance associated to the component and
+ * removes the regmap instance from the component.
+ *
+ * This function should only be used if snd_soc_component_init_regmap() was used
+ * to initialize the regmap instance.
+ */
+void snd_soc_component_exit_regmap(struct snd_soc_component *component)
+{
+	regmap_exit(component->regmap);
+	component->regmap = NULL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
+
+#endif
+
+static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
+{
+	if (!component->write && !component->read) {
+		if (!component->regmap)
+			component->regmap = dev_get_regmap(component->dev, NULL);
+		if (component->regmap)
+			snd_soc_component_setup_regmap(component);
+	}
+
+	list_add(&component->list, &component_list);
+}
+
+static void snd_soc_component_add(struct snd_soc_component *component)
+{
+	mutex_lock(&client_mutex);
+	snd_soc_component_add_unlocked(component);
+	mutex_unlock(&client_mutex);
+}
+
+static void snd_soc_component_cleanup(struct snd_soc_component *component)
+{
+	snd_soc_unregister_dais(component);
+	kfree(component->name);
+}
+
+static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
+{
+	list_del(&component->list);
+}
+
+int snd_soc_register_component(struct device *dev,
+			       const struct snd_soc_component_driver *cmpnt_drv,
+			       struct snd_soc_dai_driver *dai_drv,
+			       int num_dai)
+{
+	struct snd_soc_component *cmpnt;
+	int ret;
+
+	cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
+	if (!cmpnt) {
+		dev_err(dev, "ASoC: Failed to allocate memory\n");
+		return -ENOMEM;
+	}
+
+	ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
+	if (ret)
+		goto err_free;
+
+	cmpnt->ignore_pmdown_time = true;
+	cmpnt->registered_as_component = true;
+
+	ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
+	if (ret < 0) {
+		dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
+		goto err_cleanup;
+	}
+
+	snd_soc_component_add(cmpnt);
+
+	return 0;
+
+err_cleanup:
+	snd_soc_component_cleanup(cmpnt);
+err_free:
+	kfree(cmpnt);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_register_component);
+
+/**
+ * snd_soc_unregister_component - Unregister a component from the ASoC core
+ *
+ */
+void snd_soc_unregister_component(struct device *dev)
+{
+	struct snd_soc_component *cmpnt;
+
+	mutex_lock(&client_mutex);
+	list_for_each_entry(cmpnt, &component_list, list) {
+		if (dev == cmpnt->dev && cmpnt->registered_as_component)
+			goto found;
+	}
+	mutex_unlock(&client_mutex);
+	return;
+
+found:
+	snd_soc_component_del_unlocked(cmpnt);
+	mutex_unlock(&client_mutex);
+	snd_soc_component_cleanup(cmpnt);
+	kfree(cmpnt);
+}
+EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
+
+static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
+{
+	struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
+
+	return platform->driver->probe(platform);
+}
+
+static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
+{
+	struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
+
+	platform->driver->remove(platform);
+}
+
+/**
+ * snd_soc_add_platform - Add a platform to the ASoC core
+ * @dev: The parent device for the platform
+ * @platform: The platform to add
+ * @platform_driver: The driver for the platform
+ */
+int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
+		const struct snd_soc_platform_driver *platform_drv)
+{
+	int ret;
+
+	ret = snd_soc_component_initialize(&platform->component,
+			&platform_drv->component_driver, dev);
+	if (ret)
+		return ret;
+
+	platform->dev = dev;
+	platform->driver = platform_drv;
+
+	if (platform_drv->probe)
+		platform->component.probe = snd_soc_platform_drv_probe;
+	if (platform_drv->remove)
+		platform->component.remove = snd_soc_platform_drv_remove;
+
+#ifdef CONFIG_DEBUG_FS
+	platform->component.debugfs_prefix = "platform";
+#endif
+
+	mutex_lock(&client_mutex);
+	snd_soc_component_add_unlocked(&platform->component);
+	list_add(&platform->list, &platform_list);
+	mutex_unlock(&client_mutex);
+
+	dev_dbg(dev, "ASoC: Registered platform '%s'\n",
+		platform->component.name);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_add_platform);
+
+/**
+ * snd_soc_register_platform - Register a platform with the ASoC core
+ *
+ * @platform: platform to register
+ */
+int snd_soc_register_platform(struct device *dev,
+		const struct snd_soc_platform_driver *platform_drv)
+{
+	struct snd_soc_platform *platform;
+	int ret;
+
+	dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
+
+	platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
+	if (platform == NULL)
+		return -ENOMEM;
+
+	ret = snd_soc_add_platform(dev, platform, platform_drv);
+	if (ret)
+		kfree(platform);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_register_platform);
+
+/**
+ * snd_soc_remove_platform - Remove a platform from the ASoC core
+ * @platform: the platform to remove
+ */
+void snd_soc_remove_platform(struct snd_soc_platform *platform)
+{
+
+	mutex_lock(&client_mutex);
+	list_del(&platform->list);
+	snd_soc_component_del_unlocked(&platform->component);
+	mutex_unlock(&client_mutex);
+
+	dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
+		platform->component.name);
+
+	snd_soc_component_cleanup(&platform->component);
+}
+EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
+
+struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
+{
+	struct snd_soc_platform *platform;
+
+	mutex_lock(&client_mutex);
+	list_for_each_entry(platform, &platform_list, list) {
+		if (dev == platform->dev) {
+			mutex_unlock(&client_mutex);
+			return platform;
+		}
+	}
+	mutex_unlock(&client_mutex);
+
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
+
+/**
+ * snd_soc_unregister_platform - Unregister a platform from the ASoC core
+ *
+ * @platform: platform to unregister
+ */
+void snd_soc_unregister_platform(struct device *dev)
+{
+	struct snd_soc_platform *platform;
+
+	platform = snd_soc_lookup_platform(dev);
+	if (!platform)
+		return;
+
+	snd_soc_remove_platform(platform);
+	kfree(platform);
+}
+EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
+
+static u64 codec_format_map[] = {
+	SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
+	SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
+	SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
+	SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
+	SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
+	SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
+	SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
+	SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
+	SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
+	SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
+	SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
+	SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
+	SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
+	SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
+	SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
+	| SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
+};
+
+/* Fix up the DAI formats for endianness: codecs don't actually see
+ * the endianness of the data but we're using the CPU format
+ * definitions which do need to include endianness so we ensure that
+ * codec DAIs always have both big and little endian variants set.
+ */
+static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
+		if (stream->formats & codec_format_map[i])
+			stream->formats |= codec_format_map[i];
+}
+
+static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
+{
+	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
+
+	return codec->driver->probe(codec);
+}
+
+static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
+{
+	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
+
+	codec->driver->remove(codec);
+}
+
+static int snd_soc_codec_drv_write(struct snd_soc_component *component,
+	unsigned int reg, unsigned int val)
+{
+	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
+
+	return codec->driver->write(codec, reg, val);
+}
+
+static int snd_soc_codec_drv_read(struct snd_soc_component *component,
+	unsigned int reg, unsigned int *val)
+{
+	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
+
+	*val = codec->driver->read(codec, reg);
+
+	return 0;
+}
+
+static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
+	enum snd_soc_bias_level level)
+{
+	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
+
+	return codec->driver->set_bias_level(codec, level);
+}
+
+/**
+ * snd_soc_register_codec - Register a codec with the ASoC core
+ *
+ * @codec: codec to register
+ */
+int snd_soc_register_codec(struct device *dev,
+			   const struct snd_soc_codec_driver *codec_drv,
+			   struct snd_soc_dai_driver *dai_drv,
+			   int num_dai)
+{
+	struct snd_soc_codec *codec;
+	struct snd_soc_dai *dai;
+	int ret, i;
+
+	dev_dbg(dev, "codec register %s\n", dev_name(dev));
+
+	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
+	if (codec == NULL)
+		return -ENOMEM;
+
+	codec->component.dapm_ptr = &codec->dapm;
+	codec->component.codec = codec;
+
+	ret = snd_soc_component_initialize(&codec->component,
+			&codec_drv->component_driver, dev);
+	if (ret)
+		goto err_free;
+
+	if (codec_drv->controls) {
+		codec->component.controls = codec_drv->controls;
+		codec->component.num_controls = codec_drv->num_controls;
+	}
+	if (codec_drv->dapm_widgets) {
+		codec->component.dapm_widgets = codec_drv->dapm_widgets;
+		codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
+	}
+	if (codec_drv->dapm_routes) {
+		codec->component.dapm_routes = codec_drv->dapm_routes;
+		codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
+	}
+
+	if (codec_drv->probe)
+		codec->component.probe = snd_soc_codec_drv_probe;
+	if (codec_drv->remove)
+		codec->component.remove = snd_soc_codec_drv_remove;
+	if (codec_drv->write)
+		codec->component.write = snd_soc_codec_drv_write;
+	if (codec_drv->read)
+		codec->component.read = snd_soc_codec_drv_read;
+	codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
+	codec->dapm.idle_bias_off = codec_drv->idle_bias_off;
+	codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off;
+	if (codec_drv->seq_notifier)
+		codec->dapm.seq_notifier = codec_drv->seq_notifier;
+	if (codec_drv->set_bias_level)
+		codec->dapm.set_bias_level = snd_soc_codec_set_bias_level;
+	codec->dev = dev;
+	codec->driver = codec_drv;
+	codec->component.val_bytes = codec_drv->reg_word_size;
+
+#ifdef CONFIG_DEBUG_FS
+	codec->component.init_debugfs = soc_init_codec_debugfs;
+	codec->component.debugfs_prefix = "codec";
+#endif
+
+	if (codec_drv->get_regmap)
+		codec->component.regmap = codec_drv->get_regmap(dev);
+
+	for (i = 0; i < num_dai; i++) {
+		fixup_codec_formats(&dai_drv[i].playback);
+		fixup_codec_formats(&dai_drv[i].capture);
+	}
+
+	ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
+	if (ret < 0) {
+		dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
+		goto err_cleanup;
+	}
+
+	list_for_each_entry(dai, &codec->component.dai_list, list)
+		dai->codec = codec;
+
+	mutex_lock(&client_mutex);
+	snd_soc_component_add_unlocked(&codec->component);
+	list_add(&codec->list, &codec_list);
+	mutex_unlock(&client_mutex);
+
+	dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
+		codec->component.name);
+	return 0;
+
+err_cleanup:
+	snd_soc_component_cleanup(&codec->component);
+err_free:
+	kfree(codec);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_register_codec);
+
+/**
+ * snd_soc_unregister_codec - Unregister a codec from the ASoC core
+ *
+ * @codec: codec to unregister
+ */
+void snd_soc_unregister_codec(struct device *dev)
+{
+	struct snd_soc_codec *codec;
+
+	mutex_lock(&client_mutex);
+	list_for_each_entry(codec, &codec_list, list) {
+		if (dev == codec->dev)
+			goto found;
+	}
+	mutex_unlock(&client_mutex);
+	return;
+
+found:
+	list_del(&codec->list);
+	snd_soc_component_del_unlocked(&codec->component);
+	mutex_unlock(&client_mutex);
+
+	dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
+			codec->component.name);
+
+	snd_soc_component_cleanup(&codec->component);
+	snd_soc_cache_exit(codec);
+	kfree(codec);
+}
+EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
+
+/* Retrieve a card's name from device tree */
+int snd_soc_of_parse_card_name(struct snd_soc_card *card,
+			       const char *propname)
+{
+	struct device_node *np;
+	int ret;
+
+	if (!card->dev) {
+		pr_err("card->dev is not set before calling %s\n", __func__);
+		return -EINVAL;
+	}
+
+	np = card->dev->of_node;
+
+	ret = of_property_read_string_index(np, propname, 0, &card->name);
+	/*
+	 * EINVAL means the property does not exist. This is fine providing
+	 * card->name was previously set, which is checked later in
+	 * snd_soc_register_card.
+	 */
+	if (ret < 0 && ret != -EINVAL) {
+		dev_err(card->dev,
+			"ASoC: Property '%s' could not be read: %d\n",
+			propname, ret);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
+
+static const struct snd_soc_dapm_widget simple_widgets[] = {
+	SND_SOC_DAPM_MIC("Microphone", NULL),
+	SND_SOC_DAPM_LINE("Line", NULL),
+	SND_SOC_DAPM_HP("Headphone", NULL),
+	SND_SOC_DAPM_SPK("Speaker", NULL),
+};
+
+int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
+					  const char *propname)
+{
+	struct device_node *np = card->dev->of_node;
+	struct snd_soc_dapm_widget *widgets;
+	const char *template, *wname;
+	int i, j, num_widgets, ret;
+
+	num_widgets = of_property_count_strings(np, propname);
+	if (num_widgets < 0) {
+		dev_err(card->dev,
+			"ASoC: Property '%s' does not exist\n",	propname);
+		return -EINVAL;
+	}
+	if (num_widgets & 1) {
+		dev_err(card->dev,
+			"ASoC: Property '%s' length is not even\n", propname);
+		return -EINVAL;
+	}
+
+	num_widgets /= 2;
+	if (!num_widgets) {
+		dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
+			propname);
+		return -EINVAL;
+	}
+
+	widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
+			       GFP_KERNEL);
+	if (!widgets) {
+		dev_err(card->dev,
+			"ASoC: Could not allocate memory for widgets\n");
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < num_widgets; i++) {
+		ret = of_property_read_string_index(np, propname,
+			2 * i, &template);
+		if (ret) {
+			dev_err(card->dev,
+				"ASoC: Property '%s' index %d read error:%d\n",
+				propname, 2 * i, ret);
+			return -EINVAL;
+		}
+
+		for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
+			if (!strncmp(template, simple_widgets[j].name,
+				     strlen(simple_widgets[j].name))) {
+				widgets[i] = simple_widgets[j];
+				break;
+			}
+		}
+
+		if (j >= ARRAY_SIZE(simple_widgets)) {
+			dev_err(card->dev,
+				"ASoC: DAPM widget '%s' is not supported\n",
+				template);
+			return -EINVAL;
+		}
+
+		ret = of_property_read_string_index(np, propname,
+						    (2 * i) + 1,
+						    &wname);
+		if (ret) {
+			dev_err(card->dev,
+				"ASoC: Property '%s' index %d read error:%d\n",
+				propname, (2 * i) + 1, ret);
+			return -EINVAL;
+		}
+
+		widgets[i].name = wname;
+	}
+
+	card->of_dapm_widgets = widgets;
+	card->num_of_dapm_widgets = num_widgets;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
+
+int snd_soc_of_parse_tdm_slot(struct device_node *np,
+			      unsigned int *slots,
+			      unsigned int *slot_width)
+{
+	u32 val;
+	int ret;
+
+	if (of_property_read_bool(np, "dai-tdm-slot-num")) {
+		ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
+		if (ret)
+			return ret;
+
+		if (slots)
+			*slots = val;
+	}
+
+	if (of_property_read_bool(np, "dai-tdm-slot-width")) {
+		ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
+		if (ret)
+			return ret;
+
+		if (slot_width)
+			*slot_width = val;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
+
+int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
+				   const char *propname)
+{
+	struct device_node *np = card->dev->of_node;
+	int num_routes;
+	struct snd_soc_dapm_route *routes;
+	int i, ret;
+
+	num_routes = of_property_count_strings(np, propname);
+	if (num_routes < 0 || num_routes & 1) {
+		dev_err(card->dev,
+			"ASoC: Property '%s' does not exist or its length is not even\n",
+			propname);
+		return -EINVAL;
+	}
+	num_routes /= 2;
+	if (!num_routes) {
+		dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
+			propname);
+		return -EINVAL;
+	}
+
+	routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
+			      GFP_KERNEL);
+	if (!routes) {
+		dev_err(card->dev,
+			"ASoC: Could not allocate DAPM route table\n");
+		return -EINVAL;
+	}
+
+	for (i = 0; i < num_routes; i++) {
+		ret = of_property_read_string_index(np, propname,
+			2 * i, &routes[i].sink);
+		if (ret) {
+			dev_err(card->dev,
+				"ASoC: Property '%s' index %d could not be read: %d\n",
+				propname, 2 * i, ret);
+			return -EINVAL;
+		}
+		ret = of_property_read_string_index(np, propname,
+			(2 * i) + 1, &routes[i].source);
+		if (ret) {
+			dev_err(card->dev,
+				"ASoC: Property '%s' index %d could not be read: %d\n",
+				propname, (2 * i) + 1, ret);
+			return -EINVAL;
+		}
+	}
+
+	card->num_of_dapm_routes = num_routes;
+	card->of_dapm_routes = routes;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
+
+unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
+				     const char *prefix,
+				     struct device_node **bitclkmaster,
+				     struct device_node **framemaster)
+{
+	int ret, i;
+	char prop[128];
+	unsigned int format = 0;
+	int bit, frame;
+	const char *str;
+	struct {
+		char *name;
+		unsigned int val;
+	} of_fmt_table[] = {
+		{ "i2s",	SND_SOC_DAIFMT_I2S },
+		{ "right_j",	SND_SOC_DAIFMT_RIGHT_J },
+		{ "left_j",	SND_SOC_DAIFMT_LEFT_J },
+		{ "dsp_a",	SND_SOC_DAIFMT_DSP_A },
+		{ "dsp_b",	SND_SOC_DAIFMT_DSP_B },
+		{ "ac97",	SND_SOC_DAIFMT_AC97 },
+		{ "pdm",	SND_SOC_DAIFMT_PDM},
+		{ "msb",	SND_SOC_DAIFMT_MSB },
+		{ "lsb",	SND_SOC_DAIFMT_LSB },
+	};
+
+	if (!prefix)
+		prefix = "";
+
+	/*
+	 * check "[prefix]format = xxx"
+	 * SND_SOC_DAIFMT_FORMAT_MASK area
+	 */
+	snprintf(prop, sizeof(prop), "%sformat", prefix);
+	ret = of_property_read_string(np, prop, &str);
+	if (ret == 0) {
+		for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
+			if (strcmp(str, of_fmt_table[i].name) == 0) {
+				format |= of_fmt_table[i].val;
+				break;
+			}
+		}
+	}
+
+	/*
+	 * check "[prefix]continuous-clock"
+	 * SND_SOC_DAIFMT_CLOCK_MASK area
+	 */
+	snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
+	if (of_get_property(np, prop, NULL))
+		format |= SND_SOC_DAIFMT_CONT;
+	else
+		format |= SND_SOC_DAIFMT_GATED;
+
+	/*
+	 * check "[prefix]bitclock-inversion"
+	 * check "[prefix]frame-inversion"
+	 * SND_SOC_DAIFMT_INV_MASK area
+	 */
+	snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
+	bit = !!of_get_property(np, prop, NULL);
+
+	snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
+	frame = !!of_get_property(np, prop, NULL);
+
+	switch ((bit << 4) + frame) {
+	case 0x11:
+		format |= SND_SOC_DAIFMT_IB_IF;
+		break;
+	case 0x10:
+		format |= SND_SOC_DAIFMT_IB_NF;
+		break;
+	case 0x01:
+		format |= SND_SOC_DAIFMT_NB_IF;
+		break;
+	default:
+		/* SND_SOC_DAIFMT_NB_NF is default */
+		break;
+	}
+
+	/*
+	 * check "[prefix]bitclock-master"
+	 * check "[prefix]frame-master"
+	 * SND_SOC_DAIFMT_MASTER_MASK area
+	 */
+	snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
+	bit = !!of_get_property(np, prop, NULL);
+	if (bit && bitclkmaster)
+		*bitclkmaster = of_parse_phandle(np, prop, 0);
+
+	snprintf(prop, sizeof(prop), "%sframe-master", prefix);
+	frame = !!of_get_property(np, prop, NULL);
+	if (frame && framemaster)
+		*framemaster = of_parse_phandle(np, prop, 0);
+
+	switch ((bit << 4) + frame) {
+	case 0x11:
+		format |= SND_SOC_DAIFMT_CBM_CFM;
+		break;
+	case 0x10:
+		format |= SND_SOC_DAIFMT_CBM_CFS;
+		break;
+	case 0x01:
+		format |= SND_SOC_DAIFMT_CBS_CFM;
+		break;
+	default:
+		format |= SND_SOC_DAIFMT_CBS_CFS;
+		break;
+	}
+
+	return format;
+}
+EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
+
+static int snd_soc_get_dai_name(struct of_phandle_args *args,
+				const char **dai_name)
+{
+	struct snd_soc_component *pos;
+	int ret = -EPROBE_DEFER;
+
+	mutex_lock(&client_mutex);
+	list_for_each_entry(pos, &component_list, list) {
+		if (pos->dev->of_node != args->np)
+			continue;
+
+		if (pos->driver->of_xlate_dai_name) {
+			ret = pos->driver->of_xlate_dai_name(pos,
+							     args,
+							     dai_name);
+		} else {
+			int id = -1;
+
+			switch (args->args_count) {
+			case 0:
+				id = 0; /* same as dai_drv[0] */
+				break;
+			case 1:
+				id = args->args[0];
+				break;
+			default:
+				/* not supported */
+				break;
+			}
+
+			if (id < 0 || id >= pos->num_dai) {
+				ret = -EINVAL;
+				continue;
+			}
+
+			ret = 0;
+
+			*dai_name = pos->dai_drv[id].name;
+			if (!*dai_name)
+				*dai_name = pos->name;
+		}
+
+		break;
+	}
+	mutex_unlock(&client_mutex);
+	return ret;
+}
+
+int snd_soc_of_get_dai_name(struct device_node *of_node,
+			    const char **dai_name)
+{
+	struct of_phandle_args args;
+	int ret;
+
+	ret = of_parse_phandle_with_args(of_node, "sound-dai",
+					 "#sound-dai-cells", 0, &args);
+	if (ret)
+		return ret;
+
+	ret = snd_soc_get_dai_name(&args, dai_name);
+
+	of_node_put(args.np);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
+
+/*
+ * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
+ * @dev: Card device
+ * @of_node: Device node
+ * @dai_link: DAI link
+ *
+ * Builds an array of CODEC DAI components from the DAI link property
+ * 'sound-dai'.
+ * The array is set in the DAI link and the number of DAIs is set accordingly.
+ * The device nodes in the array (of_node) must be dereferenced by the caller.
+ *
+ * Returns 0 for success
+ */
+int snd_soc_of_get_dai_link_codecs(struct device *dev,
+				   struct device_node *of_node,
+				   struct snd_soc_dai_link *dai_link)
+{
+	struct of_phandle_args args;
+	struct snd_soc_dai_link_component *component;
+	char *name;
+	int index, num_codecs, ret;
+
+	/* Count the number of CODECs */
+	name = "sound-dai";
+	num_codecs = of_count_phandle_with_args(of_node, name,
+						"#sound-dai-cells");
+	if (num_codecs <= 0) {
+		if (num_codecs == -ENOENT)
+			dev_err(dev, "No 'sound-dai' property\n");
+		else
+			dev_err(dev, "Bad phandle in 'sound-dai'\n");
+		return num_codecs;
+	}
+	component = devm_kzalloc(dev,
+				 sizeof *component * num_codecs,
+				 GFP_KERNEL);
+	if (!component)
+		return -ENOMEM;
+	dai_link->codecs = component;
+	dai_link->num_codecs = num_codecs;
+
+	/* Parse the list */
+	for (index = 0, component = dai_link->codecs;
+	     index < dai_link->num_codecs;
+	     index++, component++) {
+		ret = of_parse_phandle_with_args(of_node, name,
+						 "#sound-dai-cells",
+						  index, &args);
+		if (ret)
+			goto err;
+		component->of_node = args.np;
+		ret = snd_soc_get_dai_name(&args, &component->dai_name);
+		if (ret < 0)
+			goto err;
+	}
+	return 0;
+err:
+	for (index = 0, component = dai_link->codecs;
+	     index < dai_link->num_codecs;
+	     index++, component++) {
+		if (!component->of_node)
+			break;
+		of_node_put(component->of_node);
+		component->of_node = NULL;
+	}
+	dai_link->codecs = NULL;
+	dai_link->num_codecs = 0;
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
+
+static int __init snd_soc_init(void)
+{
+	snd_soc_debugfs_init();
+	snd_soc_util_init();
+
+	return platform_driver_register(&soc_driver);
+}
+module_init(snd_soc_init);
+
+static void __exit snd_soc_exit(void)
+{
+	snd_soc_util_exit();
+	snd_soc_debugfs_exit();
+
+#ifdef CONFIG_DEBUG_FS
+#endif
+	platform_driver_unregister(&soc_driver);
+}
+module_exit(snd_soc_exit);
+
+/* Module information */
+MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
+MODULE_DESCRIPTION("ALSA SoC Core");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:soc-audio");