Unverified Commit b470e10e authored by Vinod Koul's avatar Vinod Koul Committed by Mark Brown
Browse files

spi: core: add dma_map_dev for dma device 



Some controllers like qcom geni need the parent device to be used for
dma mapping, so add a dma_map_dev field and let drivers fill this to be
used as mapping device

Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20210625052213.32260-4-vkoul@kernel.org


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent c58db2ab

drivers/spi/spi.c

+4 −0
Original line number Diff line number Diff line
@@ -993,11 +993,15 @@ static int __spi_map_msg(struct spi_controller *ctlr, struct spi_message *msg) 


	if (ctlr->dma_tx)

		tx_dev = ctlr->dma_tx->device->dev;

	else if (ctlr->dma_map_dev)

		tx_dev = ctlr->dma_map_dev;

	else

		tx_dev = ctlr->dev.parent;



	if (ctlr->dma_rx)

		rx_dev = ctlr->dma_rx->device->dev;

	else if (ctlr->dma_map_dev)

		rx_dev = ctlr->dma_map_dev;

	else

		rx_dev = ctlr->dev.parent;

include/linux/spi/spi.h

+1 −0
Original line number Diff line number Diff line
@@ -588,6 +588,7 @@ struct spi_controller { 
	bool			(*can_dma)(struct spi_controller *ctlr,

					   struct spi_device *spi,

					   struct spi_transfer *xfer);

	struct device *dma_map_dev;



	/*

	 * These hooks are for drivers that want to use the generic