diff options
| author | manjugk manjugk <manjugk@ti.com> | 2010-03-04 07:11:56 +0000 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2010-04-22 17:34:27 -0700 |
| commit | 519e61666f4030426fc539d4e7102dc2bad41113 (patch) | |
| tree | 5553802fccc286236dd0a4c6ba9f5c8a3e90e4e9 | |
| parent | 29501577a7f3c925d5273064752ce3dc356ccfad (diff) | |
| download | lwn-519e61666f4030426fc539d4e7102dc2bad41113.tar.gz lwn-519e61666f4030426fc539d4e7102dc2bad41113.zip | |
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>
| -rw-r--r-- | 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 2ab224c8e16c..f6c9bdc95bce 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]; |