linux-kernel - Re: [PATCH 1/2] ARM: dts: imx6dl-yapp4: Fix the QCA switch register address

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Date: Mon, 12 Feb 2024 17:08:58 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Michal Vokáč <michal.vokac@...ft.com>
Cc: Shawn Guo <shawnguo@...nel.org>, Fabio Estevam <festevam@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	NXP Linux Team <linux-imx@....com>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] ARM: dts: imx6dl-yapp4: Fix the QCA switch register
 address

On Mon, Feb 12, 2024 at 04:23:41PM +0100, Michal Vokáč wrote:
> The switch address in the node name is in hex while the address in the reg
> property is decimal which is wrong. Fix that and write the reg address
> as a hexadecimal number.

This feels the wrong way around. The reg value is used by the kernel,
where as the node name is not. If the reg value was wrong, the switch
would not be found. If this file was tested, why did somebody not
notice the switch was missing?

Do you have the hardware? Can you confirm is really does not work
without this patch? Was 15b43e497ffd never actually tested?

Thanks
	Andrew

> 
> Fixes: 15b43e497ffd ("ARM: dts: imx6dl-yapp4: Use correct pseudo PHY address for the switch")
> Signed-off-by: Michal Vokáč <michal.vokac@...ft.com>
> ---
>  arch/arm/boot/dts/nxp/imx/imx6dl-yapp4-common.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/nxp/imx/imx6dl-yapp4-common.dtsi b/arch/arm/boot/dts/nxp/imx/imx6dl-yapp4-common.dtsi
> index cfb0fc924b42..5763f8253d51 100644
> --- a/arch/arm/boot/dts/nxp/imx/imx6dl-yapp4-common.dtsi
> +++ b/arch/arm/boot/dts/nxp/imx/imx6dl-yapp4-common.dtsi
> @@ -143,7 +143,7 @@
>  
>  		switch@10 {
>  			compatible = "qca,qca8334";
> -			reg = <10>;
> +			reg = <0x10>;
>  			reset-gpios = <&gpio1 25 GPIO_ACTIVE_LOW>;
>  
>  			switch_ports: ports {
> -- 
> 2.1.4
>