Sansa AMS: Disable DMA clocks when not in use

Add dma_retain() and dma_release() to reference count the users

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19344 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 3 insertions, 0 deletions

diff --git a/firmware/target/arm/as3525/dma-target.h b/firmware/target/arm/as3525/dma-target.h
index 26037999f0..6e373b89a6 100644
--- a/firmware/target/arm/as3525/dma-target.h
+++ b/firmware/target/arm/as3525/dma-target.h
@@ -37,3 +37,6 @@ void dma_enable_channel(int channel, void *src, void *dst, int peri,
                         size_t size, int nwords, void (*callback)(void));
 inline void dma_disable_channel(int channel);
 inline void dma_wait_transfer(int channel);
+
+void dma_retain(void);
+void dma_release(void);