]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commitdiff
omap: DMA: Init CDAC to zero
authormanjugk manjugk <manjugk@ti.com>
Thu, 4 Mar 2010 07:11:56 +0000 (07:11 +0000)
committerTony Lindgren <tony@atomide.com>
Fri, 23 Apr 2010 00:34:27 +0000 (17:34 -0700)
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

index 2ab224c8e16c450f6b2bd96fdff71b94aabf864d..f6c9bdc95bcef2089d2a642e8a9e39ae9012bd74 100644 (file)
@@ -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];