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spi: dw: Let the DMAC set the transfer widths

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SPI transfers are of defined length, unlike some UART traffic, so it is
safe to let the DMA controller choose a suitable memory width.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>
This commit is contained in:
Phil Elwell
2024-09-19 18:12:12 +01:00
committed by Dom Cobley
parent f5b17dcd65
commit 21c6e78a2e
1 changed files with 0 additions and 2 deletions
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2
drivers/spi/spi-dw-dma.c
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@@ -330,7 +330,6 @@ static int dw_spi_dma_config_tx(struct dw_spi *dws)
txconf.direction = DMA_MEM_TO_DEV; txconf.direction = DMA_MEM_TO_DEV;
txconf.dst_addr = dws->dma_addr; txconf.dst_addr = dws->dma_addr;
txconf.dst_maxburst = dws->txburst; txconf.dst_maxburst = dws->txburst;
txconf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
txconf.dst_addr_width = dw_spi_dma_convert_width(dws->n_bytes); txconf.dst_addr_width = dw_spi_dma_convert_width(dws->n_bytes);
txconf.device_fc = false; txconf.device_fc = false;
@@ -431,7 +430,6 @@ static int dw_spi_dma_config_rx(struct dw_spi *dws)
rxconf.direction = DMA_DEV_TO_MEM; rxconf.direction = DMA_DEV_TO_MEM;
rxconf.src_addr = dws->dma_addr; rxconf.src_addr = dws->dma_addr;
rxconf.src_maxburst = dws->rxburst; rxconf.src_maxburst = dws->rxburst;
rxconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
rxconf.src_addr_width = dw_spi_dma_convert_width(dws->n_bytes); rxconf.src_addr_width = dw_spi_dma_convert_width(dws->n_bytes);
rxconf.device_fc = false; rxconf.device_fc = false;