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32 lines
1.1 KiB
Diff
32 lines
1.1 KiB
Diff
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From 5cf7209c294a58029984880d4858e2d3c7e46a3c Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Thu, 19 Sep 2024 18:12:12 +0100
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Subject: [PATCH] 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
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safe to let the DMA controller choose a suitable memory width.
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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drivers/spi/spi-dw-dma.c | 2 --
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1 file changed, 2 deletions(-)
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--- a/drivers/spi/spi-dw-dma.c
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+++ b/drivers/spi/spi-dw-dma.c
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@@ -330,7 +330,6 @@ static int dw_spi_dma_config_tx(struct d
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txconf.direction = DMA_MEM_TO_DEV;
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txconf.dst_addr = dws->dma_addr;
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txconf.dst_maxburst = dws->txburst;
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- txconf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
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txconf.dst_addr_width = dw_spi_dma_convert_width(dws->n_bytes);
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txconf.device_fc = false;
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@@ -431,7 +430,6 @@ static int dw_spi_dma_config_rx(struct d
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rxconf.direction = DMA_DEV_TO_MEM;
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rxconf.src_addr = dws->dma_addr;
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rxconf.src_maxburst = dws->rxburst;
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- rxconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
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rxconf.src_addr_width = dw_spi_dma_convert_width(dws->n_bytes);
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rxconf.device_fc = false;
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