linux-kernel - Re: [PATCH v2 2/2] Input: ads7846: do not overwrite spi->mode flags set by spi framework

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Message-ID: <20201111185155.GX1003057@dtor-ws>
Date:   Wed, 11 Nov 2020 10:51:55 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Alexandru Ardelean <alexandru.ardelean@...log.com>,
        Mark Brown <broonie@...nel.org>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        linux-spi@...r.kernel.org, David Jander <david@...tonic.nl>
Subject: Re: [PATCH v2 2/2] Input: ads7846: do not overwrite spi->mode flags
 set by spi framework

On Tue, Oct 27, 2020 at 10:57:24AM +0100, Oleksij Rempel wrote:
> Do not overwrite spi->mode flags set by spi framework, otherwise the
> chip select polarity will get lost.
> 
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>

Acked-by: Dmitry Torokhov <dmitry.torokhov@...il.com>

Mark, could you please pick up this one through your tree as well? I do
not believe that outstanding patches that I have in my queue for this
driver will clash with it.  

Thanks!

> ---
>  drivers/input/touchscreen/ads7846.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
> index 8fd7fc39c4fd..f2dc2c8ab5ec 100644
> --- a/drivers/input/touchscreen/ads7846.c
> +++ b/drivers/input/touchscreen/ads7846.c
> @@ -1288,7 +1288,8 @@ static int ads7846_probe(struct spi_device *spi)
>  	 * may not.  So we stick to very-portable 8 bit words, both RX and TX.
>  	 */
>  	spi->bits_per_word = 8;
> -	spi->mode = SPI_MODE_0;
> +	spi->mode &= ~SPI_MODE_X_MASK;
> +	spi->mode |= SPI_MODE_0;
>  	err = spi_setup(spi);
>  	if (err < 0)
>  		return err;
> -- 
> 2.28.0
> 

-- 
Dmitry