Gitweb: http://git.kernel.org/linus/519e61666f4030426fc539d4e7102dc2bad41113
Commit: 519e61666f4030426fc539d4e7102dc2bad41113
Parent: 29501577a7f3c925d5273064752ce3dc356ccfad
Author: manjugk manjugk <manjugk@ti.com>
AuthorDate: Thu Mar 4 07:11:56 2010 +0000
Committer: Tony Lindgren <tony@atomide.com>
CommitDate: Thu Apr 22 17:34:27 2010 -0700
omap: DMA: Init CDAC to zero
The register DMA4_CDAC needs to be initialized to zero
before starting DMA transfer.
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Govindraj R <govindraj.raja@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Reported-by:S, Venkatraman <svenkatr@ti.com>
Signed-off-by: Manjunatha GK <manjugk@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
arch/arm/plat-omap/dma.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
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];
--
