Commit b62a1307 authored by Amelie Delaunay's avatar Amelie Delaunay Committed by Vinod Koul

dmaengine: stm32-dma3: add device_pause and device_resume ops

STM32 DMA3 controller is able to suspend an ongoing transfer (the transfer
is suspended after the ongoing burst is flushed to the destination) and
resume it from the point it was suspended. No need to reconfigure any
register.
Signed-off-by: default avatarAmelie Delaunay <amelie.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/20240531150712.2503554-9-amelie.delaunay@foss.st.comSigned-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent b3b893a9
......@@ -1249,6 +1249,35 @@ static int stm32_dma3_config(struct dma_chan *c, struct dma_slave_config *config
return 0;
}
static int stm32_dma3_pause(struct dma_chan *c)
{
struct stm32_dma3_chan *chan = to_stm32_dma3_chan(c);
int ret;
ret = stm32_dma3_chan_suspend(chan, true);
if (ret)
return ret;
chan->dma_status = DMA_PAUSED;
dev_dbg(chan2dev(chan), "vchan %pK: paused\n", &chan->vchan);
return 0;
}
static int stm32_dma3_resume(struct dma_chan *c)
{
struct stm32_dma3_chan *chan = to_stm32_dma3_chan(c);
stm32_dma3_chan_suspend(chan, false);
chan->dma_status = DMA_IN_PROGRESS;
dev_dbg(chan2dev(chan), "vchan %pK: resumed\n", &chan->vchan);
return 0;
}
static int stm32_dma3_terminate_all(struct dma_chan *c)
{
struct stm32_dma3_chan *chan = to_stm32_dma3_chan(c);
......@@ -1485,6 +1514,8 @@ static int stm32_dma3_probe(struct platform_device *pdev)
dma_dev->device_prep_dma_cyclic = stm32_dma3_prep_dma_cyclic;
dma_dev->device_caps = stm32_dma3_caps;
dma_dev->device_config = stm32_dma3_config;
dma_dev->device_pause = stm32_dma3_pause;
dma_dev->device_resume = stm32_dma3_resume;
dma_dev->device_terminate_all = stm32_dma3_terminate_all;
dma_dev->device_synchronize = stm32_dma3_synchronize;
dma_dev->device_tx_status = dma_cookie_status;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment