From 5133c4520e8d8ec5e0f70806bd36ee8b8c949648 Mon Sep 17 00:00:00 2001 From: Huang Chao Date: Fri, 13 Jun 2014 11:22:17 +0800 Subject: [PATCH] dma: pl330: Implement the dma channel pause/resume interfaces This patch implements dma pause and resume interfaces for the pl330 dmac driver. When the dmaengine_pause callback is called from audio platform driver, the pl330 driver should handle the pause command. And when the dmaengine_resume callback function is called, the pl330 driver should handle the resume command. In order not to return error code for pause/resume operation, currently there is nothing implemented for pause and resume switch interfaces, and there might have some continuous work for pl330 channel configuration in the future. However, the odroidx2/u3 board can pause/resume with this implementation. Change-Id: I584106a4d7861fde308997e6843088fbf0a9b1bb Signed-off-by: Huang Chao --- drivers/dma/pl330.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index 24f8ae3..ed8cacd 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -2416,6 +2416,12 @@ static int pl330_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, unsigned pch->burst_len = slave_config->src_maxburst; } break; + case DMA_PAUSE: + /* TODO: set up dma channel and config register if any */ + break; + case DMA_RESUME: + /* TODO: set up dma channel and config register if any */ + break; default: dev_err(pch->dmac->pif.dev, "Not supported command.\n"); return -ENXIO; -- 2.7.4