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authorM'boumba Cedric Madianga <cedric.madianga@gmail.com>2016-12-13 16:40:50 +0300
committerVinod Koul <vinod.koul@intel.com>2017-01-03 06:53:23 +0300
commitdc808675104b920f2be1ac4bf1e9aa57680f0699 (patch)
treea73040332886eeaa490a3b7d9f9fc8f8998fe0b2 /drivers/dma
parent2b12c5580e0a4c0ffd513d1522dd39b2464fb207 (diff)
downloadlinux-dc808675104b920f2be1ac4bf1e9aa57680f0699.tar.xz
dmaengine: stm32-dma: Add synchronization support
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>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/stm32-dma.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c
index 8a29b028d39e..53b2ee79cc0e 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);
@@ -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);