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-rw-r--r--include/sound/dmaengine_pcm.h4
-rw-r--r--sound/soc/soc-devres.c41
2 files changed, 45 insertions, 0 deletions
diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h
index 15017311f2e9..4ef986cab182 100644
--- a/include/sound/dmaengine_pcm.h
+++ b/include/sound/dmaengine_pcm.h
@@ -140,6 +140,10 @@ int snd_dmaengine_pcm_register(struct device *dev,
unsigned int flags);
void snd_dmaengine_pcm_unregister(struct device *dev);
+int devm_snd_dmaengine_pcm_register(struct device *dev,
+ const struct snd_dmaengine_pcm_config *config,
+ unsigned int flags);
+
int snd_dmaengine_pcm_prepare_slave_config(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct dma_slave_config *slave_config);
diff --git a/sound/soc/soc-devres.c b/sound/soc/soc-devres.c
index b1d732255c02..999861942d28 100644
--- a/sound/soc/soc-devres.c
+++ b/sound/soc/soc-devres.c
@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
static void devm_component_release(struct device *dev, void *res)
{
@@ -84,3 +85,43 @@ int devm_snd_soc_register_card(struct device *dev, struct snd_soc_card *card)
return ret;
}
EXPORT_SYMBOL_GPL(devm_snd_soc_register_card);
+
+#ifdef CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM
+
+static void devm_dmaengine_pcm_release(struct device *dev, void *res)
+{
+ snd_dmaengine_pcm_unregister(*(struct device **)res);
+}
+
+/**
+ * devm_snd_dmaengine_pcm_register - resource managed dmaengine PCM registration
+ * @dev: The parent device for the PCM device
+ * @config: Platform specific PCM configuration
+ * @flags: Platform specific quirks
+ *
+ * Register a dmaengine based PCM device with automatic unregistration when the
+ * device is unregistered.
+ */
+int devm_snd_dmaengine_pcm_register(struct device *dev,
+ const struct snd_dmaengine_pcm_config *config, unsigned int flags)
+{
+ struct device **ptr;
+ int ret;
+
+ ptr = devres_alloc(devm_dmaengine_pcm_release, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return -ENOMEM;
+
+ ret = snd_dmaengine_pcm_register(dev, config, flags);
+ if (ret == 0) {
+ *ptr = dev;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devm_snd_dmaengine_pcm_register);
+
+#endif