[PATCH RFC 2/8] dma: mpc512x: fix start condition in execute()
From: Gerhard Sittig <hidden>
Date: 2013-07-12 15:26:15
Also in:
linux-devicetree
Subsystem:
dma generic offload engine subsystem, the rest · Maintainers:
Vinod Koul, Linus Torvalds
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 <redacted> --- 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