Commit e7bbb7ac authored by Vinod Koul's avatar Vinod Koul
Browse files

dmaengine: add peripheral configuration 

Some complex dmaengine controllers have capability to program the
peripheral device, so pass on the peripheral configuration as part of
dma_slave_config

Link: https://lore.kernel.org/r/20201109085450.24843-3-vkoul@kernel.org


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 678198f2

include/linux/dmaengine.h

+5 −0
Original line number Diff line number Diff line
@@ -418,6 +418,9 @@ enum dma_slave_buswidth { 
 * @slave_id: Slave requester id. Only valid for slave channels. The dma

 * slave peripheral will have unique id as dma requester which need to be

 * pass as slave config.

 * @peripheral_config: peripheral configuration for programming peripheral

 * for dmaengine transfer

 * @peripheral_size: peripheral configuration buffer size

 *

 * This struct is passed in as configuration data to a DMA engine

 * in order to set up a certain channel for DMA transport at runtime.
@@ -443,6 +446,8 @@ struct dma_slave_config { 
	u32 dst_port_window_size;

	bool device_fc;

	unsigned int slave_id;

	void *peripheral_config;

	size_t peripheral_size;

};



/**