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authorJaewon Kim <jaewon02.kim@samsung.com>2023-07-11 11:20:20 +0300
committerMark Brown <broonie@kernel.org>2023-07-12 15:11:06 +0300
commit9ec3c5517e22a12d2ff1b71e844f7913641460c6 (patch)
tree98b63ff11c32c5569b1ffc96aa778b76beb7cbca /drivers/spi
parent5158814cbb37bbb38344b3ecddc24ba2ed0365f2 (diff)
downloadlinux-9ec3c5517e22a12d2ff1b71e844f7913641460c6.tar.xz
spi: s3c64xx: clear loopback bit after loopback test
When SPI loopback transfer is performed, S3C64XX_SPI_MODE_SELF_LOOPBACK bit still remained. It works as loopback even if the next transfer is not spi loopback mode. If not SPI_LOOP, needs to clear S3C64XX_SPI_MODE_SELF_LOOPBACK bit. Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com> Fixes: ffb7bcd3b27e ("spi: s3c64xx: support loopback mode") Reviewed-by: Chanho Park <chanho61.park@samsung.com> Link: https://lore.kernel.org/r/20230711082020.138165-1-jaewon02.kim@samsung.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-s3c64xx.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index fd55697144cc..b6c2659a66ca 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -684,6 +684,8 @@ static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
if ((sdd->cur_mode & SPI_LOOP) && sdd->port_conf->has_loopback)
val |= S3C64XX_SPI_MODE_SELF_LOOPBACK;
+ else
+ val &= ~S3C64XX_SPI_MODE_SELF_LOOPBACK;
writel(val, regs + S3C64XX_SPI_MODE_CFG);