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[v2] OMAP: DMA: Init CDAC to zero

Message ID 1267686716-22264-1-git-send-email-manjugk@ti.com (mailing list archive)
State Accepted
Commit 27c45d5a3328417c9a73c50380d3f68249aa1e4f
Delegated to: Tony Lindgren
Headers show

Commit Message

manjugk manjugk March 4, 2010, 7:11 a.m. UTC 
None
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Patch

diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index 2ab224c..f6c9bdc 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -936,6 +936,15 @@  void omap_start_dma(int lch)
 {
 	u32 l;
 
+	/*
+	 * The CPC/CDAC register needs to be initialized to zero
+	 * before starting dma transfer.
+	 */
+	if (cpu_is_omap15xx())
+		dma_write(0, CPC(lch));
+	else
+		dma_write(0, CDAC(lch));
+
 	if (!omap_dma_in_1510_mode() && dma_chan[lch].next_lch != -1) {
 		int next_lch, cur_lch;
 		char dma_chan_link_map[OMAP_DMA4_LOGICAL_DMA_CH_COUNT];