From: Jaewon Kim jaewon02.kim@samsung.com
[ Upstream commit 9ec3c5517e22a12d2ff1b71e844f7913641460c6 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- 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 7ac17f0d18a95..1a8b31e20baf2 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -668,6 +668,8 @@ 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);