ASoC: core: add platform DAPM debugfs support

Allow platform widgets to be visible in debugfs like codec widgets.

Signed-off-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 4f67e01..8fa4dca 100644 (file)
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -706,6 +706,11 @@ struct snd_soc_platform {
        struct list_head card_list;
 
        struct snd_soc_dapm_context dapm;
+
+#ifdef CONFIG_DEBUG_FS
+       struct dentry *debugfs_platform_root;
+       struct dentry *debugfs_dapm;
+#endif
 };
 
 struct snd_soc_dai_link {

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 50b8b80..6bad7cd 100644 (file)
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -300,6 +300,27 @@ 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->card->debugfs_card_root;
+
+       platform->debugfs_platform_root = debugfs_create_dir(platform->name,
+                                                      debugfs_card_root);
+       if (!platform->debugfs_platform_root) {
+               dev_warn(platform->dev,
+                       "Failed to create platform debugfs directory\n");
+               return;
+       }
+
+       snd_soc_dapm_debugfs_init(&platform->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,
                                    size_t count, loff_t *ppos)
 {
@@ -433,6 +454,14 @@ static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 {
 }
 
+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_init_card_debugfs(struct snd_soc_card *card)
 {
 }
@@ -920,6 +949,7 @@ static void soc_remove_dai_link(struct snd_soc_card *card, int num, int order)
                /* Make sure all DAPM widgets are freed */
                snd_soc_dapm_free(&platform->dapm);
 
+               soc_cleanup_platform_debugfs(platform);
                platform->probed = 0;
                list_del(&platform->card_list);
                module_put(platform->dev->driver->owner);
@@ -1037,6 +1067,8 @@ 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);
+
        if (driver->dapm_widgets)
                snd_soc_dapm_new_controls(&platform->dapm,
                        driver->dapm_widgets, driver->num_dapm_widgets);