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| author | Huang Chao <chao7.huang@samsung.com> | 2014-06-13 11:22:17 +0800 |
|---|---|---|
| committer | Sylwester Nawrocki <s.nawrocki@samsung.com> | 2014-06-17 01:46:19 -0700 |
| commit | cce3e4d22a457d9ff6053af9fd4a18a50dd36557 (patch) | |
| tree | 13771528bae7757624fc56583cf87851067d2aa1 | |
| parent | b3524144a0d308203f6c44595a93ab4dec15dd1f (diff) | |
| download | linux-3.10-cce3e4d22a457d9ff6053af9fd4a18a50dd36557.tar.gz linux-3.10-cce3e4d22a457d9ff6053af9fd4a18a50dd36557.tar.bz2 linux-3.10-cce3e4d22a457d9ff6053af9fd4a18a50dd36557.zip | |
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 <chao7.huang@samsung.com>
| -rw-r--r-- | drivers/dma/pl330.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index 24f8ae3f376..ed8cacdddcb 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; |