[PATCH] spi: s3c64xx: clear loopback bit after loopback test

Jaewon Kim
2023-07-11T08:25:55Z

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>
---
drivers/spi/spi-s3c64xx.c | 2 ++
1 file changed, 2 insertions(+)

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);

--
2.17.1