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spi: s3c64xx: clear loopback bit after loopback test

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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: ffb7bcd3b2 ("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>
This commit is contained in:
Jaewon Kim 2023-07-11 17:20:20 +09:00 committed by Mark Brown
parent 5158814cbb
commit 9ec3c5517e
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GPG key ID: 24D68B725D5487D0
1 changed files with 2 additions and 0 deletions
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2
drivers/spi/spi-s3c64xx.c
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@ -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);