From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Gerhard Sittig To: linuxppc-dev@lists.ozlabs.org, devicetree-discuss@lists.ozlabs.org, Alexander Popov Subject: [PATCH RFC 2/8] dma: mpc512x: fix start condition in execute() Date: Fri, 12 Jul 2013 17:26:15 +0200 Message-Id: <1373642781-32631-3-git-send-email-gsi@denx.de> In-Reply-To: <1373642781-32631-1-git-send-email-gsi@denx.de> References: <1373642781-32631-1-git-send-email-gsi@denx.de> Cc: Lars-Peter Clausen , Arnd Bergmann , Vinod Koul , Gerhard Sittig , Dan Williams , Anatolij Gustschin List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 --- 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