linux-kernel - Re: [PATCH 29/37] dt-bindings: pinctrl: renesas: document RZ/G3S SoC

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Message-ID: <20230912161335.GA866121-robh@kernel.org>
Date:   Tue, 12 Sep 2023 11:13:35 -0500
From:   Rob Herring <robh@...nel.org>
To:     Claudiu <claudiu.beznea@...on.dev>
Cc:     geert+renesas@...der.be, mturquette@...libre.com, sboyd@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        ulf.hansson@...aro.org, linus.walleij@...aro.org,
        gregkh@...uxfoundation.org, jirislaby@...nel.org,
        magnus.damm@...il.com, catalin.marinas@....com, will@...nel.org,
        prabhakar.mahadev-lad.rj@...renesas.com,
        biju.das.jz@...renesas.com, quic_bjorande@...cinc.com,
        arnd@...db.de, konrad.dybcio@...aro.org, neil.armstrong@...aro.org,
        nfraprado@...labora.com, rafal@...ecki.pl,
        wsa+renesas@...g-engineering.com,
        linux-renesas-soc@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mmc@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-serial@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH 29/37] dt-bindings: pinctrl: renesas: document RZ/G3S SoC

On Tue, Sep 12, 2023 at 07:51:49AM +0300, Claudiu wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> 
> Add documentation for pin controller found on RZ/G3S (R9A08G045) SoC.
> Compared with RZ/G2{L,UL} RZ/G3S has 82 general-purpose IOs, no slew
> rate and output impedance support and more values for drive strength
> which needs to be expressed in microamp.
> 
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> ---
>  .../pinctrl/renesas,rzg2l-pinctrl.yaml        | 26 +++++++++++++++----
>  1 file changed, 21 insertions(+), 5 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml
> index 145c5442f268..079e5be69330 100644
> --- a/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml
> +++ b/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml
> @@ -25,6 +25,7 @@ properties:
>            - enum:
>                - renesas,r9a07g043-pinctrl # RZ/G2UL{Type-1,Type-2} and RZ/Five
>                - renesas,r9a07g044-pinctrl # RZ/G2{L,LC}
> +              - renesas,r9a08g045-pinctrl # RZ/G3S
>  
>        - items:
>            - enum:
> @@ -77,6 +78,26 @@ additionalProperties:
>          - $ref: pincfg-node.yaml#
>          - $ref: pinmux-node.yaml#
>  
> +        - if:
> +            properties:
> +              compatible:
> +                contains:
> +                  enum:
> +                    - renesas,r9a08g045-pinctrl
> +          then:
> +            properties:
> +              drive-strength-microamp:
> +                enum: [ 1900, 2200, 4000, 4400, 4500, 4700, 5200, 5300, 5700,
> +                        5800, 6000, 6050, 6100, 6550, 6800, 7000, 8000, 9000,
> +                        10000 ]
> +          else:
> +            properties:
> +              drive-strength:
> +                enum: [ 2, 4, 8, 12 ]
> +              output-impedance-ohms:
> +                enum: [ 33, 50, 66, 100 ]
> +              slew-rate: true
> +
>        description:
>          Pin controller client devices use pin configuration subnodes (children
>          and grandchildren) for desired pin configuration.
> @@ -89,14 +110,9 @@ additionalProperties:
>              alternate function configuration number using the RZG2L_PORT_PINMUX()
>              helper macro in <dt-bindings/pinctrl/rzg2l-pinctrl.h>.
>          pins: true
> -        drive-strength:
> -          enum: [ 2, 4, 8, 12 ]
> -        output-impedance-ohms:
> -          enum: [ 33, 50, 66, 100 ]

Removing these entries will break things. Except that this binding is 
missing 'additionalProperties: false' at this level. That should be 
fixed first.

I would suggest you keep these here and make the if/then schema just not 
allow properties (e.g. "drive-strength-microamp: false").

>          power-source:
>            description: I/O voltage in millivolt.
>            enum: [ 1800, 2500, 3300 ]
> -        slew-rate: true
>          gpio-hog: true
>          gpios: true
>          input-enable: true
> -- 
> 2.39.2
>