linux-kernel - Re: [PATCH] powerpc/devicetrees: Change 'gpios' to 'cs-gpios' on fsl,spi nodes

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Date:   Fri, 13 Dec 2019 15:34:18 -0600
From:   Rob Herring <robh@...nel.org>
To:     Christophe Leroy <christophe.leroy@....fr>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Mark Rutland <mark.rutland@....com>,
        Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, devicetree@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-spi@...r.kernel.org
Subject: Re: [PATCH] powerpc/devicetrees: Change 'gpios' to 'cs-gpios' on
 fsl,spi nodes

On Thu, Nov 28, 2019 at 12:16:35PM +0000, Christophe Leroy wrote:
> Since commit 0f0581b24bd0 ("spi: fsl: Convert to use CS GPIO
> descriptors"), the prefered way to define chipselect GPIOs is using
> 'cs-gpios' property instead of the legacy 'gpios' property.

This will break using a new dtb on a kernel without the above commit. Or 
with any OS that never made the change.

I'm fine with the doc change, but you should keep 'gpios' as deprecated.

> 
> Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
> ---
>  Documentation/devicetree/bindings/spi/fsl-spi.txt | 8 ++++----
>  arch/powerpc/boot/dts/mgcoge.dts                  | 2 +-
>  arch/powerpc/boot/dts/mpc832x_rdb.dts             | 2 +-
>  arch/powerpc/boot/dts/mpc8610_hpcd.dts            | 2 +-
>  4 files changed, 7 insertions(+), 7 deletions(-)