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| author | Jaewon Kim <jaewon02.kim@samsung.com> | 2023-07-11 17:20:20 +0900 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-07-12 13:11:06 +0100 |
| commit | 9ec3c5517e22a12d2ff1b71e844f7913641460c6 (patch) | |
| tree | 98b63ff11c32c5569b1ffc96aa778b76beb7cbca /drivers | |
| parent | 5158814cbb37bbb38344b3ecddc24ba2ed0365f2 (diff) | |
| download | lwn-9ec3c5517e22a12d2ff1b71e844f7913641460c6.tar.gz lwn-9ec3c5517e22a12d2ff1b71e844f7913641460c6.zip | |
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')
| -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 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); |