linux-kernel - Re: [PATCH 08/14] arm64: dts: meson-gxl: fix internal phy compatible

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Date:   Tue, 20 Aug 2019 22:38:13 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Neil Armstrong <narmstrong@...libre.com>, jbrunet@...libre.com
Cc:     khilman@...libre.com, linux-amlogic@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH 08/14] arm64: dts: meson-gxl: fix internal phy compatible

adding Jerome

On Wed, Aug 14, 2019 at 4:31 PM Neil Armstrong <narmstrong@...libre.com> wrote:
>
> This fixes the following DT schemas check errors:
> meson-gxl-s805x-libretech-ac.dt.yaml: ethernet-phy@8: compatible: ['ethernet-phy-id0181.4400', 'ethernet-phy-ieee802.3-c22'] is not valid under any of the given schemas
>
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> ---
>  arch/arm64/boot/dts/amlogic/meson-gxl.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
> index ee1ecdbcc958..43eb158bee24 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
> @@ -709,7 +709,7 @@
>                         #size-cells = <0>;
>
>                         internal_phy: ethernet-phy@8 {
> -                               compatible = "ethernet-phy-id0181.4400", "ethernet-phy-ieee802.3-c22";
> +                               compatible = "ethernet-phy-id0181.4400";
on G12A there was a specific reason (iirc it was because the PHY ID
can be any arbitrary value programmed into some register) why we added
it with a compatible string
Jerome, do we have the same situation on GXL/GXM as well?

if not I prefer to drop the compatible string because it's probably
from a time where the PHY dt-bindings stated "add the PHY ID
compatible string if you know it" while the actual suggestion was
"only add it if reading the ID doesn't work for some reason"


Martin