[PATCH v2 1/2] ASoC: soc-core: add debugfs_prefix member to snd_soc_component_driver

[Heiner Kallweit <hkallweit1@gmail.com>]

Allow the component debugfs_prefix to be set from
snd_soc_component_driver. First use case is avoiding a duplicate
debugfs entry error in case a device has multiple components
which have the same name therefore.

Note that we don't set component->debugfs_prefix if it's set already.
That's needed because partially component->debugfs_prefix is set
before calling snd_soc_component_initialize().

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 include/sound/soc-component.h | 4 ++++
 sound/soc/soc-core.c          | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/include/sound/soc-component.h b/include/sound/soc-component.h
index a52080407..766dc6f00 100644
--- a/include/sound/soc-component.h
+++ b/include/sound/soc-component.h
@@ -179,6 +179,10 @@ struct snd_soc_component_driver {
 				  struct snd_pcm_hw_params *params);
 	bool use_dai_pcm_id;	/* use DAI link PCM ID as PCM device number */
 	int be_pcm_base;	/* base device ID for all BE PCMs */
+
+#ifdef CONFIG_DEBUG_FS
+	const char *debugfs_prefix;
+#endif
 };
 
 struct snd_soc_component {
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index a088bc9f7..11cb15319 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -2586,6 +2586,11 @@ int snd_soc_component_initialize(struct snd_soc_component *component,
 	component->dev		= dev;
 	component->driver	= driver;
 
+#ifdef CONFIG_DEBUG_FS
+	if (!component->debugfs_prefix)
+		component->debugfs_prefix = driver->debugfs_prefix;
+#endif
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
-- 
2.35.1