netdev - Re: [PATCHv1 1/6] dt-bindings: net: ethernet-phy: Fix the parsing of ethernet-phy compatible string

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Message-ID: <YFyIvxOHwIs3R/IT@lunn.ch>
Date:   Thu, 25 Mar 2021 13:57:35 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Anand Moon <linux.amoon@...il.com>
Cc:     Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Kevin Hilman <khilman@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, Rob Herring <robh@...nel.org>
Subject: Re: [PATCHv1 1/6] dt-bindings: net: ethernet-phy: Fix the parsing of
 ethernet-phy compatible string

On Thu, Mar 25, 2021 at 12:42:20PM +0000, Anand Moon wrote:
> Fix the parsing of check of pattern ethernet-phy-ieee802.3 used
> by the device tree to initialize the mdio phy.
> 
> As per the of_mdio below 2 are valid compatible string
> 	"ethernet-phy-ieee802.3-c22"
> 	"ethernet-phy-ieee802.3-c45"

Nope, this is not the full story. Yes, you can have these compatible
strings. But you can also use the PHY ID,
e.g. ethernet-phy-idAAAA.BBBB, where AAAA and BBBB are what you find in
registers 2 and 3 of the PHY.

> Cc: Rob Herring <robh@...nel.org>
> Signed-off-by: Anand Moon <linux.amoon@...il.com>
> ---
>  Documentation/devicetree/bindings/net/ethernet-phy.yaml | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/net/ethernet-phy.yaml b/Documentation/devicetree/bindings/net/ethernet-phy.yaml
> index 2766fe45bb98..cfc7909d3e56 100644
> --- a/Documentation/devicetree/bindings/net/ethernet-phy.yaml
> +++ b/Documentation/devicetree/bindings/net/ethernet-phy.yaml
> @@ -33,7 +33,7 @@ properties:
>          description: PHYs that implement IEEE802.3 clause 22
>        - const: ethernet-phy-ieee802.3-c45
>          description: PHYs that implement IEEE802.3 clause 45
> -      - pattern: "^ethernet-phy-id[a-f0-9]{4}\\.[a-f0-9]{4}$"
> +      - pattern: "^ethernet-phy-ieee[0-9]{3}\\.[0-9][-][a-f0-9]{4}$"

So here you need, in addition to, not instead of.

Please test you change on for example imx6ul-14x14-evk.dtsi

   Andrew