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spi: rockchip: set dma tx burst 8

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If it is 16, and DMATDLR is 15, it would cause tx fifo
overflow.

Change-Id: I14592492be2ebd65ee47e916e25a60f0905d3eca
Signed-off-by: Huibin Hong <huibin.hong@rock-chips.com>
Signed-off-by: Yifeng Zhao <zyf@rock-chips.com>
This commit is contained in:
Huibin Hong
2017-10-17 15:46:21 +08:00
committed by Tao Huang
parent 87dbea63d5
commit 7c15863913
1 changed files with 1 additions and 4 deletions
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5
drivers/spi/spi-rockchip.c
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@@ -482,10 +482,7 @@ static int rockchip_spi_prepare_dma(struct rockchip_spi *rs)
txconf.direction = rs->dma_tx.direction;
txconf.dst_addr = rs->dma_tx.addr;
txconf.dst_addr_width = rs->n_bytes;
if (rs->dma_caps.max_burst > 4)
txconf.dst_maxburst = 4;
else
txconf.dst_maxburst = 1;
txconf.dst_maxburst = 8;
dmaengine_slave_config(rs->dma_tx.ch, &txconf);
txdesc = dmaengine_prep_slave_sg(