Messages in this thread Patch in this message | | | From | M'boumba Cedric Madianga <> | Subject | [PATCH 8/9] dmaengine: stm32-dma: Add synchronization support | Date | Tue, 13 Dec 2016 14:40:50 +0100 |
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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> --- drivers/dma/stm32-dma.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c index 35639f6..b7be43a 100644 --- a/drivers/dma/stm32-dma.c +++ b/drivers/dma/stm32-dma.c @@ -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); @@ -1068,6 +1075,7 @@ 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); -- 1.9.1
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