Add dmaengine_get_quirks API for peripheral devices to query quirks if they need it to make special workaround due to broken dma controller design.
Signed-off-by: Shawn Lin shawn.lin@rock-chips.com ---
Changes in v5: None Changes in v4: None Changes in v3: None Changes in v2: None Changes in v1: None
include/linux/dmaengine.h | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index e2f5eb4..5174ca4 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -704,6 +704,7 @@ struct dma_device {
int (*device_config)(struct dma_chan *chan, struct dma_slave_config *config); + int (*device_get_quirks)(struct dma_chan *chan); int (*device_pause)(struct dma_chan *chan); int (*device_resume)(struct dma_chan *chan); int (*device_terminate_all)(struct dma_chan *chan); @@ -723,6 +724,14 @@ static inline int dmaengine_slave_config(struct dma_chan *chan, return -ENOSYS; }
+static inline int dmaengine_get_quirks(struct dma_chan *chan) +{ + if (chan->device->device_get_quirks) + return chan->device->device_get_quirks(chan); + + return -ENOSYS; +} + static inline bool is_slave_direction(enum dma_transfer_direction direction) { return (direction == DMA_MEM_TO_DEV) || (direction == DMA_DEV_TO_MEM);