Messages in this thread Patch in this message | | | From | Vinod Koul <> | Subject | [PATCH v3 3/5] spi: core: add dma_map_dev for dma device | Date | Fri, 25 Jun 2021 10:52:11 +0530 |
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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: Vinod Koul <vkoul@kernel.org> --- drivers/spi/spi.c | 4 ++++ include/linux/spi/spi.h | 1 + 2 files changed, 5 insertions(+)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index e353b7a9e54e..315f7e7545f7 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -961,11 +961,15 @@ 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; diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 74239d65c7fd..4d3f116f5723 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -586,6 +586,7 @@ 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 -- 2.31.1
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