linux-kernel - Re: [PATCH v1 2/6] ARM: dts: lan966x: add sgpio node

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Message-ID: <c1462fbe-1619-7a13-4b3d-bb4ffcf24f1b@microchip.com>
Date:   Fri, 4 Mar 2022 08:24:11 +0000
From:   <Claudiu.Beznea@...rochip.com>
To:     <michael@...le.cc>, <Kavyasree.Kotagiri@...rochip.com>,
        <Nicolas.Ferre@...rochip.com>
CC:     <arnd@...db.de>, <olof@...om.net>, <soc@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski@...onical.com>,
        <alexandre.belloni@...tlin.com>
Subject: Re: [PATCH v1 2/6] ARM: dts: lan966x: add sgpio node

On 03.03.2022 18:03, Michael Walle wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> Add the device tree node for the SGPIO IP block reused from the
> SparX-5. Keep the node disabled by default.
> 
> Signed-off-by: Michael Walle <michael@...le.cc>
> ---
>  arch/arm/boot/dts/lan966x.dtsi | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/lan966x.dtsi b/arch/arm/boot/dts/lan966x.dtsi
> index 5e9cbc8cdcbc..a7d46a2ca058 100644
> --- a/arch/arm/boot/dts/lan966x.dtsi
> +++ b/arch/arm/boot/dts/lan966x.dtsi
> @@ -223,6 +223,32 @@ gpio: pinctrl@...04064 {
>                         #interrupt-cells = <2>;
>                 };
> 
> +               sgpio: gpio@...04190 {
> +                       #address-cells = <1>;
> +                       #size-cells = <0>;
> +                       compatible = "microchip,sparx5-sgpio";
> +                       clocks = <&sys_clk>;
> +                       reg = <0xe2004190 0x118>;
> +                       status = "disabled";
> +
> +                       sgpio_in: gpio@0 {
> +                               reg = <0>;
> +                               compatible = "microchip,sparx5-sgpio-bank";
> +                               gpio-controller;
> +                               #gpio-cells = <3>;
> +                               interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
> +                               interrupt-controller;
> +                               #interrupt-cells = <3>;

Can you preserve the order or properties for this node

> +                       };
> +
> +                       sgpio_out: gpio@1 {
> +                               compatible = "microchip,sparx5-sgpio-bank";
> +                               reg = <1>;
> +                               gpio-controller;
> +                               #gpio-cells = <3>;

and this node. It would be easier to follow it.
As a note I see most of the nodes in this DT follows the order:
- compatible
- reg

For consistency with the rest of the nodes it would be good to keep the
same order here.

> +                       };
> +               };
> +
>                 gic: interrupt-controller@...11000 {
>                         compatible = "arm,gic-400", "arm,cortex-a7-gic";
>                         #interrupt-cells = <3>;
> --
> 2.30.2
>