ASoC: Let snd_soc_platform subclass snd_soc_component

There is an increasing amount of code that is very similar between platforms,
CODECS and other components. Making platforms a component will allow us to
share this code. For now the patch just adds component and component_driver
fields to the platform and platform_driver structs and registers the platform as
a component. Followup patches will be used to consolidate code between the
different types of components.

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

diff --git a/include/sound/soc.h b/include/sound/soc.h
index f8a79c1..94a2dc2 100644 (file)
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -778,6 +778,7 @@ struct snd_soc_platform_driver {
        int (*remove)(struct snd_soc_platform *);
        int (*suspend)(struct snd_soc_dai *dai);
        int (*resume)(struct snd_soc_dai *dai);
+       struct snd_soc_component_driver component_driver;
 
        /* pcm creation and destruction */
        int (*pcm_new)(struct snd_soc_pcm_runtime *);
@@ -831,6 +832,8 @@ struct snd_soc_platform {
        struct list_head list;
        struct list_head card_list;
 
+       struct snd_soc_component component;
+
        struct snd_soc_dapm_context dapm;
 
 #ifdef CONFIG_DEBUG_FS
@@ -1107,6 +1110,19 @@ static inline struct snd_soc_codec *snd_soc_component_to_codec(
        return container_of(component, struct snd_soc_codec, component);
 }
 
+/**
+ * snd_soc_component_to_platform() - Casts a component to the platform it is embedded in
+ * @component: The component to cast to a platform
+ *
+ * This function must only be used on components that are known to be platforms.
+ * Otherwise the behavior is undefined.
+ */
+static inline struct snd_soc_platform *snd_soc_component_to_platform(
+       struct snd_soc_component *component)
+{
+       return container_of(component, struct snd_soc_platform, component);
+}
+
 /* codec IO */
 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg);
 unsigned int snd_soc_write(struct snd_soc_codec *codec,

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 3314efb..a95c7e5 100644 (file)
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -3921,6 +3921,8 @@ EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
                const struct snd_soc_platform_driver *platform_drv)
 {
+       int ret;
+
        /* create platform component name */
        platform->name = fmt_single_name(dev, &platform->id);
        if (platform->name == NULL)
@@ -3933,6 +3935,16 @@ int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
        platform->dapm.stream_event = platform_drv->stream_event;
        mutex_init(&platform->mutex);
 
+       /* register component */
+       ret = __snd_soc_register_component(dev, &platform->component,
+                                          &platform_drv->component_driver,
+                                          NULL, NULL, 0, false);
+       if (ret < 0) {
+               dev_err(platform->component.dev,
+                       "ASoC: Failed to register component: %d\n", ret);
+               return ret;
+       }
+
        mutex_lock(&client_mutex);
        list_add(&platform->list, &platform_list);
        mutex_unlock(&client_mutex);
@@ -3974,6 +3986,8 @@ EXPORT_SYMBOL_GPL(snd_soc_register_platform);
  */
 void snd_soc_remove_platform(struct snd_soc_platform *platform)
 {
+       snd_soc_unregister_component(platform->dev);
+
        mutex_lock(&client_mutex);
        list_del(&platform->list);
        mutex_unlock(&client_mutex);