linux-kernel - Re: [PATCH v1 5/8] dt-bindings: net: dsa: microchip: add missing spi-{cpha,cpol} properties

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Message-ID: <20230607230459.GA151104-robh@kernel.org>
Date:   Wed, 7 Jun 2023 17:04:59 -0600
From:   Rob Herring <robh@...nel.org>
To:     Leonard Göhrs <l.goehrs@...gutronix.de>
Cc:     Woojung Huh <woojung.huh@...rochip.com>,
        UNGLinuxDriver@...rochip.com, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Marek Vasut <marex@...x.de>,
        kernel@...gutronix.de,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 5/8] dt-bindings: net: dsa: microchip: add missing
 spi-{cpha,cpol} properties

On Wed, Jun 07, 2023 at 01:55:04PM +0200, Leonard Göhrs wrote:
> This patch allows setting the correct SPI phase and polarity for KSZ
> switches.
> 
> Signed-off-by: Leonard Göhrs <l.goehrs@...gutronix.de>
> ---
>  Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
> index e51be1ac03623..f7c620d9ee8b4 100644
> --- a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
> @@ -49,6 +49,9 @@ properties:
>        Set if the output SYNCLKO clock should be disabled. Do not mix with
>        microchip,synclko-125.
>  
> +  spi-cpha: true
> +  spi-cpol: true

These should only be needed if the mode is configurable or variable. 
Otherwise, the driver for the device should set the mode correctly.

Rob