Re: [PATCH] spi: s3c64xx: clear loopback bit after loopback test

Andi Shyti
2023-07-11T22:20:04Z

Hi Jaewon,

On Tue, Jul 11, 2023 at 05:20:20PM +0900, Jaewon Kim wrote:
> 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>

with the change suggested by Chanho:

Reviewed-by: Andi Shyti <andi.shyti@kernel.org>

Mark, can you add the

Fixes: ffb7bcd3b27e ("spi: s3c64xx: support loopback mode")

tag or should Jaewon resend?

Thanks,
Andi

> ---
> 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 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);
>
> --
> 2.17.1