adjust the conditions how submitted DMA jobs get started: memory transfers
need to get initiated by an explicit software request, all transfers which
involve peripherals need to reference the external requester line
Signed-off-by: Gerhard Sittig <g...@denx.de>
---
drivers/dma/mpc512x_dma.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/dma/mpc512x_dma.c b/drivers/dma/mpc512x_dma.c
index f90b717..df10a48 100644
--- a/drivers/dma/mpc512x_dma.c
+++ b/drivers/dma/mpc512x_dma.c
@@ -272,10 +272,12 @@ static void mpc_dma_execute(struct mpc_dma_chan *mchan)
mdma->tcd[cid].e_sg = 1;
switch (cid) {
- case 26:
+ default:
+ /* peripherals involved, use external request */
out_8(&mdma->regs->dmaserq, cid);
break;
case 32:
+ /* memory transfer, software provided start signal */
out_8(&mdma->regs->dmassrt, cid);
break;
}
--
1.7.10.4
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