linux-kernel - Re: [PATCH net-next v1] net: phy: spi_ks8995: Do not overwrite SPI mode flags

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Message-ID: <20201109194934.GE1456319@lunn.ch>
Date:   Mon, 9 Nov 2020 20:49:34 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Sven Van Asbroeck <thesven73@...il.com>
Cc:     Heiner Kallweit <hkallweit1@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v1] net: phy: spi_ks8995: Do not overwrite SPI
 mode flags

> +++ b/drivers/net/phy/spi_ks8995.c
> @@ -491,7 +491,9 @@ static int ks8995_probe(struct spi_device *spi)
>  
>  	spi_set_drvdata(spi, ks);
>  
> -	spi->mode = SPI_MODE_0;
> +	/* use SPI_MODE_0 without changing any other mode flags */
> +	spi->mode &= ~(SPI_CPHA | SPI_CPOL);
> +	spi->mode |= SPI_MODE_0;
>  	spi->bits_per_word = 8;

Did you check to see if there is a help to set just the mode without
changing any of the other bits?

	 Andrew