Blackfin arch: add set_dma_curr_addr DMA API to support sound driver recording function

Signed-off-by: Roy Huang <roy.huang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c
index 7cf02f02a1db..7e2201908356 100644
--- a/arch/blackfin/kernel/bfin_dma_5xx.c
+++ b/arch/blackfin/kernel/bfin_dma_5xx.c
@@ -345,6 +345,16 @@ void set_dma_sg(unsigned int channel, struct dmasg *sg, int nr_sg)
 }
 EXPORT_SYMBOL(set_dma_sg);
 
+void set_dma_curr_addr(unsigned int channel, unsigned long addr)
+{
+        BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+               && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+        dma_ch[channel].regs->curr_addr_ptr = addr;
+        SSYNC();
+}
+EXPORT_SYMBOL(set_dma_curr_addr);
+
 /*------------------------------------------------------------------------------
  *      Get the DMA status of a specific DMA channel from the system.
  *-----------------------------------------------------------------------------*/