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| author | Jaewon Kim <jaewon02.kim@samsung.com> | 2023-07-11 17:20:20 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-07-27 08:50:39 +0200 |
| commit | c401b72836cac16297a7d8a903eb6c34f7e48358 (patch) | |
| tree | 90156527835b170f75167d1f9736ca3eff6b19e7 /drivers/spi | |
| parent | 9c85f71d3fc87f27566c52ac4c96a1ed814770cc (diff) | |
| download | linux-c401b72836cac16297a7d8a903eb6c34f7e48358.tar.gz | |
spi: s3c64xx: clear loopback bit after loopback test
[ 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>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-s3c64xx.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 71d324ec9a70..1480df7b43b3 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); |