Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

spi: rockchip: configure CTRLR1 according to size and data frame

Browse source 
CTRLR1 is number of data frames, when rx only.
When data frame is 8 bit, CTRLR1 is len-1.
When data frame is 16 bit, CTRLR1 is (len/2)-1.

Signed-off-by: Huibin Hong <huibin.hong@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Huibin Hong 2017-08-16 10:12:02 +08:00 committed by Mark Brown
parent 6b860e69e8
commit 04b37d2d02
1 changed files with 7 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
drivers/spi/spi-rockchip.c
View file

@ -568,7 +568,13 @@ static void rockchip_spi_config(struct rockchip_spi *rs)
writel_relaxed(cr0, rs->regs + ROCKCHIP_SPI_CTRLR0);
writel_relaxed(rs->len - 1, rs->regs + ROCKCHIP_SPI_CTRLR1);
if (rs->n_bytes == 1)
writel_relaxed(rs->len - 1, rs->regs + ROCKCHIP_SPI_CTRLR1);
else if (rs->n_bytes == 2)
writel_relaxed((rs->len / 2) - 1, rs->regs + ROCKCHIP_SPI_CTRLR1);
else
writel_relaxed((rs->len * 2) - 1, rs->regs + ROCKCHIP_SPI_CTRLR1);
writel_relaxed(rs->fifo_len / 2 - 1, rs->regs + ROCKCHIP_SPI_TXFTLR);
writel_relaxed(rs->fifo_len / 2 - 1, rs->regs + ROCKCHIP_SPI_RXFTLR);