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dmaengine: stm32-dma: Add synchronization support

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Implement the new device_synchronize() callback to allow proper
synchronization when stopping a channel.

Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
M'boumba Cedric Madianga 2016-12-13 14:40:50 +01:00 committed by Vinod Koul
parent 2b12c5580e
commit dc80867510
1 changed files with 8 additions and 0 deletions
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8
drivers/dma/stm32-dma.c
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@ -403,6 +403,13 @@ static int stm32_dma_terminate_all(struct dma_chan *c)
return 0;
}
static void stm32_dma_synchronize(struct dma_chan *c)
{
struct stm32_dma_chan *chan = to_stm32_dma_chan(c);
vchan_synchronize(&chan->vchan);
}
static void stm32_dma_dump_reg(struct stm32_dma_chan *chan)
{
struct stm32_dma_device *dmadev = stm32_dma_get_dev(chan);
@ -1066,6 +1073,7 @@ static int stm32_dma_probe(struct platform_device *pdev)
dd->device_prep_dma_cyclic = stm32_dma_prep_dma_cyclic;
dd->device_config = stm32_dma_slave_config;
dd->device_terminate_all = stm32_dma_terminate_all;
dd->device_synchronize = stm32_dma_synchronize;
dd->src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);