linux-kernel - Re: [PATCH v1] riscv: dts: renesas: clean up dtbs

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Date:   Wed, 12 Jul 2023 11:43:43 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...il.com>
To:     Conor Dooley <conor.dooley@...rochip.com>, geert+renesas@...der.be
Cc:     conor@...nel.org, Magnus Damm <magnus.damm@...il.com>,
        Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        linux-renesas-soc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] riscv: dts: renesas: clean up dtbs_check W=1 warning
 due to empty phy node

Hello!

On 7/12/23 11:14 AM, Conor Dooley wrote:

> dtbs_check w/ W=1 complains:
> Warning (unit_address_vs_reg): /soc/ethernet@...20000/ethernet-phy@7: node has a unit name, but no reg or ranges property
> Warning (avoid_unnecessary_addr_size): /soc/ethernet@...20000: unnecessary #address-cells/#size-cells without "ranges" or child "reg" property
> 
> The ethernet@...20000 node is guarded by an `#if (!SW_ET0_EN_N)` in
> rzg2ul-smarc-som.dtsi, where the phy child node is added. In
> rzfive-smarc-som.dtsi, the ethernet node is marked disabled & the
> interrupt properties are deleted from the phy child node. As a result,
> the produced dts looks like:
> 	ethernet@...20000 {
> 		compatible = "renesas,r9a07g043-gbeth\0renesas,rzg2l-gbeth";
> 		/* snip */
> 		#address-cells = <0x01>;
> 		#size-cells = <0x00>;
> 		status = "disabled";
> 
> 		ethernet-phy@7 {
> 		};
> 	};
> 
> Adding a corresponding `#if (!SW_ET0_EN_N)` around the node in
> rzfive-smarc-som.dtsi avoids the complaint, as the empty child node is
> not added:
> 	ethernet@...20000 {
> 		compatible = "renesas,r9a07g043-gbeth\0renesas,rzg2l-gbeth";
> 		/* snip */
> 		#address-cells = <0x01>;
> 		#size-cells = <0x00>;
> 		status = "disabled";
> 	};
> 
> Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
[...]

> diff --git a/arch/riscv/boot/dts/renesas/rzfive-smarc-som.dtsi b/arch/riscv/boot/dts/renesas/rzfive-smarc-som.dtsi
> index d6f18754eb5d..c62debc7ca7e 100644
> --- a/arch/riscv/boot/dts/renesas/rzfive-smarc-som.dtsi
> +++ b/arch/riscv/boot/dts/renesas/rzfive-smarc-som.dtsi
> @@ -22,6 +22,7 @@ &dmac {
>  	status = "disabled";
>  };
>  
> +#if (!SW_ET0_EN_N)

   Are the parens really needed here?

>  &eth0 {
>  	status = "disabled";
>  
[...]

MBR, Sergey