linux-kernel - Re: [RFC PATCH v3 2/2] ARM: dts: rockchip: fix yaml warnings for rk3288-pmu-sram compatible nodes

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Date:   Fri, 10 Apr 2020 12:52:30 -0500
From:   Rob Herring <robh@...nel.org>
To:     Johan Jonker <jbx6244@...il.com>
Cc:     heiko@...ech.de, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v3 2/2] ARM: dts: rockchip: fix yaml warnings for
 rk3288-pmu-sram compatible nodes

On Tue, Mar 31, 2020 at 02:13:52PM +0200, Johan Jonker wrote:
> A test with the command below gives for example these warnings:
> 
> arch/arm/boot/dts/rk3288-evb-act8846.dt.yaml: sram@...20000:
> '#address-cells' is a required property
> arch/arm/boot/dts/rk3288-evb-act8846.dt.yaml: sram@...20000:
> '#size-cells' is a required property
> arch/arm/boot/dts/rk3288-evb-act8846.dt.yaml: sram@...20000:
> 'ranges' is a required property
> 
> Fix this error by adding '#address-cells', '#size-cells' and
> 'ranges' to the 'rockchip,rk3288-pmu-sram' compatible node
> in rk3288.dtsi.
> 
> make ARCH=arm dtbs_check
> DT_SCHEMA_FILES=Documentation/devicetree/bindings/sram/sram.yaml
> 
> Signed-off-by: Johan Jonker <jbx6244@...il.com>
> ---
> Not tested with hardware.
> 
> Changed v2:
>   Fix dtsi.
> ---
>  arch/arm/boot/dts/rk3288.dtsi | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi
> index 9c8741bb1..f102fec69 100644
> --- a/arch/arm/boot/dts/rk3288.dtsi
> +++ b/arch/arm/boot/dts/rk3288.dtsi
> @@ -730,6 +730,9 @@
>  	pmu_sram: sram@...20000 {
>  		compatible = "rockchip,rk3288-pmu-sram", "mmio-sram";
>  		reg = <0x0 0xff720000 0x0 0x1000>;
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges = <0 0x0 0xff720000 0x1000>;

I think we should make these optional instead if there's no child nodes. 
And if there are child nodes, then these will be required.

Rob