From dc808675104b920f2be1ac4bf1e9aa57680f0699 Mon Sep 17 00:00:00 2001 From: M'boumba Cedric Madianga Date: Tue, 13 Dec 2016 14:40:50 +0100 Subject: [PATCH] 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 Signed-off-by: Vinod Koul --- 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 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);