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spi: s3c64xx: clear loopback bit after loopback test
[ Upstream commit9ec3c5517e
] 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> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -668,6 +668,8 @@ static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
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if ((sdd->cur_mode & SPI_LOOP) && sdd->port_conf->has_loopback)
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val |= S3C64XX_SPI_MODE_SELF_LOOPBACK;
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else
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val &= ~S3C64XX_SPI_MODE_SELF_LOOPBACK;
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writel(val, regs + S3C64XX_SPI_MODE_CFG);
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