linux-kernel - Re: [PATCH 1/2] ARM64: dts: Add support for Meson GXM

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Date:   Mon, 21 Nov 2016 15:42:38 -0800
From:   Kevin Hilman <khilman@...libre.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     carlo@...one.org, linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH 1/2] ARM64: dts: Add support for Meson GXM

Neil,

Neil Armstrong <narmstrong@...libre.com> writes:

> Following the Amlogic Linux kernel, it seem the only differences
> between the GXL and GXM SoCs are the CPU Clusters.
>
> This commit renames the gxl-s905d-p23x DTSI in a common file for
> S905D p20x and S912 q20x boards.

s/p20x/p23x/ ??

> Then adds a meson-gxm dtsi and reproduce the P23x to Q20x boards
> dts files since the S905D and S912 SoCs shares the same pinout
> and the P23x and Q20x boards are identical.
>
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>

I had to drop this as it breaks the network on (at least) gxbb-p200, but...

[...]

> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-p200.dts b/arch/arm64/boot/dts/amlogic/meson-gxbb-p200.dts
> index 03e3d76..17bb77c 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gxbb-p200.dts
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-p200.dts
> @@ -56,3 +56,22 @@
>  	pinctrl-0 = <&i2c_b_pins>;
>  	pinctrl-names = "default";
>  };
> +
> +&ethmac {
> +	status = "okay";
> +	pinctrl-0 = <&eth_rgmii_pins>;
> +	pinctrl-names = "default";
> +
> +	phy-handle = <&eth_phy0>;
> +
> +	mdio {
> +		compatible = "snps,dwmac-mdio";
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		eth_phy0: ethernet-phy@0 {
> +			reg = <0>;
> +			realtek,disable-eee-1000t;
> +		};
> +	};
> +};

... backing out this change makes it work again.

This change also looks suspicious as it's using the proposed disable-eee
properties, which I don't think have been merged yet.

> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-p201.dts b/arch/arm64/boot/dts/amlogic/meson-gxbb-p201.dts
> index 39bb037..5608c51 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gxbb-p201.dts
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-p201.dts
> @@ -50,3 +50,10 @@
>  	compatible = "amlogic,p201", "amlogic,meson-gxbb";
>  	model = "Amlogic Meson GXBB P201 Development Board";
>  };
> +
> +&ethmac {
> +	status = "okay";
> +	pinctrl-0 = <&eth_rmii_pins>;
> +	pinctrl-names = "default";
> +	phy-mode = "rmii";
> +};

This also doesn't look releveant to the GXL/GXM changes being introduced
in this patch.

Could you separate out any GXBB-related changes into a separate patch
(if they are in fact needed) and re-spin this?

Thanks,

Kevin