ASoC: Move debugfs registration to the component level

The debugfs registration is mostly identical between platforms and CODECs. This
patches consolidates the two implementations at the component level.

Unfortunately there are still a couple of CODEC specific debugfs files that are
related to legacy ASoC IO that need to be registered. For this a new callback is
added to the component struct that will be initialized when a CODEC is
registered and will be used to register the CODEC specific files. Once there are
no drivers left using legacy IO this can be removed again.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 52 insertions, 70 deletions

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index d4bfd4a..79371a7 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -270,79 +270,56 @@ static const struct file_operations codec_reg_fops = {
 	.llseek = default_llseek,
 };
 
-static struct dentry *soc_debugfs_create_dir(struct dentry *parent,
-	const char *fmt, ...)
+static void soc_init_component_debugfs(struct snd_soc_component *component)
 {
-	struct dentry *de;
-	va_list ap;
-	char *s;
+	if (component->debugfs_prefix) {
+		char *name;
 
-	va_start(ap, fmt);
-	s = kvasprintf(GFP_KERNEL, fmt, ap);
-	va_end(ap);
+		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 (!s)
-		return NULL;
+	if (!component->debugfs_root) {
+		dev_warn(component->dev,
+			"ASoC: Failed to create component debugfs directory\n");
+		return;
+	}
 
-	de = debugfs_create_dir(s, parent);
-	kfree(s);
+	snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
+		component->debugfs_root);
 
-	return de;
+	if (component->init_debugfs)
+		component->init_debugfs(component);
 }
 
-static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
+static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
 {
-	struct dentry *debugfs_card_root = codec->component.card->debugfs_card_root;
+	debugfs_remove_recursive(component->debugfs_root);
+}
 
-	codec->debugfs_codec_root = soc_debugfs_create_dir(debugfs_card_root,
-						"codec:%s",
-						codec->component.name);
-	if (!codec->debugfs_codec_root) {
-		dev_warn(codec->dev,
-			"ASoC: Failed to create codec debugfs directory\n");
-		return;
-	}
+static void soc_init_codec_debugfs(struct snd_soc_component *component)
+{
+	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
 
-	debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
+	debugfs_create_bool("cache_sync", 0444, codec->component.debugfs_root,
 			    &codec->cache_sync);
-	debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
+	debugfs_create_bool("cache_only", 0444, codec->component.debugfs_root,
 			    &codec->cache_only);
 
 	codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
-						 codec->debugfs_codec_root,
+						 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");
-
-	snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
-}
-
-static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
-{
-	debugfs_remove_recursive(codec->debugfs_codec_root);
-}
-
-static void soc_init_platform_debugfs(struct snd_soc_platform *platform)
-{
-	struct dentry *debugfs_card_root = platform->component.card->debugfs_card_root;
-
-	platform->debugfs_platform_root = soc_debugfs_create_dir(debugfs_card_root,
-						"platform:%s",
-						platform->component.name);
-	if (!platform->debugfs_platform_root) {
-		dev_warn(platform->dev,
-			"ASoC: Failed to create platform debugfs directory\n");
-		return;
-	}
-
-	snd_soc_dapm_debugfs_init(&platform->component.dapm,
-		platform->debugfs_platform_root);
-}
-
-static void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
-{
-	debugfs_remove_recursive(platform->debugfs_platform_root);
 }
 
 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
@@ -474,19 +451,15 @@ static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 
 #else
 
-static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
-{
-}
+#define soc_init_codec_debugfs NULL
 
-static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
+static inline void soc_init_component_debugfs(
+	struct snd_soc_component *component)
 {
 }
 
-static inline void soc_init_platform_debugfs(struct snd_soc_platform *platform)
-{
-}
-
-static inline void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
+static inline void soc_cleanup_component_debugfs(
+	struct snd_soc_component *component)
 {
 }
 
@@ -1026,7 +999,7 @@ static int soc_remove_platform(struct snd_soc_platform *platform)
 	/* Make sure all DAPM widgets are freed */
 	snd_soc_dapm_free(&platform->component.dapm);
 
-	soc_cleanup_platform_debugfs(platform);
+	soc_cleanup_component_debugfs(&platform->component);
 	platform->probed = 0;
 	module_put(platform->dev->driver->owner);
 
@@ -1046,7 +1019,7 @@ static void soc_remove_codec(struct snd_soc_codec *codec)
 	/* Make sure all DAPM widgets are freed */
 	snd_soc_dapm_free(&codec->dapm);
 
-	soc_cleanup_codec_debugfs(codec);
+	soc_cleanup_component_debugfs(&codec->component);
 	codec->probed = 0;
 	list_del(&codec->card_list);
 	module_put(codec->dev->driver->owner);
@@ -1187,7 +1160,7 @@ static int soc_probe_codec(struct snd_soc_card *card,
 	if (!try_module_get(codec->dev->driver->owner))
 		return -ENODEV;
 
-	soc_init_codec_debugfs(codec);
+	soc_init_component_debugfs(&codec->component);
 
 	if (driver->dapm_widgets) {
 		ret = snd_soc_dapm_new_controls(&codec->dapm,
@@ -1242,7 +1215,7 @@ static int soc_probe_codec(struct snd_soc_card *card,
 	return 0;
 
 err_probe:
-	soc_cleanup_codec_debugfs(codec);
+	soc_cleanup_component_debugfs(&codec->component);
 	module_put(codec->dev->driver->owner);
 
 	return ret;
@@ -1262,7 +1235,7 @@ static int soc_probe_platform(struct snd_soc_card *card,
 	if (!try_module_get(platform->dev->driver->owner))
 		return -ENODEV;
 
-	soc_init_platform_debugfs(platform);
+	soc_init_component_debugfs(&platform->component);
 
 	if (driver->dapm_widgets)
 		snd_soc_dapm_new_controls(&platform->component.dapm,
@@ -1302,7 +1275,7 @@ static int soc_probe_platform(struct snd_soc_card *card,
 	return 0;
 
 err_probe:
-	soc_cleanup_platform_debugfs(platform);
+	soc_cleanup_component_debugfs(&platform->component);
 	module_put(platform->dev->driver->owner);
 
 	return ret;
@@ -4266,6 +4239,10 @@ int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
 	if (platform_drv->read)
 		platform->component.read = snd_soc_platform_drv_read;
 
+#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);
@@ -4455,6 +4432,11 @@ int snd_soc_register_codec(struct device *dev,
 	codec->component.val_bytes = codec_drv->reg_word_size;
 	mutex_init(&codec->mutex);
 
+#ifdef CONFIG_DEBUG_FS
+	codec->component.init_debugfs = soc_init_codec_debugfs;
+	codec->component.debugfs_prefix = "codec";
+#endif
+
 	if (!codec->component.write) {
 		if (codec_drv->get_regmap)
 			regmap = codec_drv->get_regmap(dev);