linux-kernel - Re: [PATCH v3] arm64: dts: mt8183: Move CrosEC base detection node to kukui-based DTs

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Date: Wed, 17 Jan 2024 11:14:14 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Nícolas F. R. A. Prado <nfraprado@...labora.com>,
 Matthias Brugger <matthias.bgg@...il.com>
Cc: Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Enric Balletbo i Serra <eballetbo@...nel.org>,
 Ikjoon Jang <ikjn@...omium.org>, Stephen Boyd <swboyd@...omium.org>,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org,
 kernel@...labora.com
Subject: Re: [PATCH v3] arm64: dts: mt8183: Move CrosEC base detection node to
 kukui-based DTs

Il 16/01/24 22:38, Nícolas F. R. A. Prado ha scritto:
> The cbas node is used to describe base detection functionality in the
> ChromeOS EC, which is used for units that have a detachable keyboard and
> thus rely on this functionality to switch between tablet and laptop
> mode.
> 
> Despite the original commit having added the cbas node to the
> mt8183-kukui.dtsi, not all machines that include it are detachables. In
> fact all machines that include from mt8183-kukui-jacuzzi.dtsi are either
> clamshells (ie normal laptops) or convertibles, meaning the keyboard can
> be flipped but not detached. The detection for the keyboard getting
> flipped is handled by the driver bound to the keyboard-controller node
> in the EC.
> 
> Move the base detection node from the base kukui dtsi to the dtsis where
> all machines are detachables, and thus actually make use of the node.
> 
> Fixes: 4fa8492d1e5b ("arm64: dts: mt8183: add cbas node under cros_ec")
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

> ---
> Changes in v3:
> - Instead of deleting the node in jacuzzi, moved the node from kukui to
>    the dtsis including kukui that are detachables
> 
> Changes in v2:
> - Moved cbas node removal to jacuzzi dtsi
> ---
>   arch/arm64/boot/dts/mediatek/mt8183-kukui-kakadu.dtsi | 4 ++++
>   arch/arm64/boot/dts/mediatek/mt8183-kukui-kodama.dtsi | 4 ++++
>   arch/arm64/boot/dts/mediatek/mt8183-kukui-krane.dtsi  | 4 ++++
>   arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi        | 4 ----
>   4 files changed, 12 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui-kakadu.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui-kakadu.dtsi
> index b6a9830af269..bfb9e42c8aca 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8183-kukui-kakadu.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui-kakadu.dtsi
> @@ -360,6 +360,10 @@ pen_eject {
>   };
>   
>   &cros_ec {
> +	cbas {
> +		compatible = "google,cros-cbas";
> +	};
> +
>   	keyboard-controller {
>   		compatible = "google,cros-ec-keyb-switches";
>   	};
> diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui-kodama.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui-kodama.dtsi
> index 306c95166f3f..5c1bf6a1e475 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8183-kukui-kodama.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui-kodama.dtsi
> @@ -339,6 +339,10 @@ touch_pin_reset: pin_reset {
>   };
>   
>   &cros_ec {
> +	cbas {
> +		compatible = "google,cros-cbas";
> +	};
> +
>   	keyboard-controller {
>   		compatible = "google,cros-ec-keyb-switches";
>   	};
> diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui-krane.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui-krane.dtsi
> index 382e4c6d7191..0f5fa893a774 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8183-kukui-krane.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui-krane.dtsi
> @@ -343,6 +343,10 @@ rst_pin {
>   };
>   
>   &cros_ec {
> +	cbas {
> +		compatible = "google,cros-cbas";
> +	};
> +
>   	keyboard-controller {
>   		compatible = "google,cros-ec-keyb-switches";
>   	};
> diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
> index 5506de83f61d..66eb099e15f0 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
> @@ -937,10 +937,6 @@ usbc_extcon: extcon0 {
>   			google,usb-port-id = <0>;
>   		};
>   
> -		cbas {
> -			compatible = "google,cros-cbas";
> -		};
> -
>   		typec {
>   			compatible = "google,cros-ec-typec";
>   			#address-cells = <1>;
> 
> ---
> base-commit: 0f067394dd3b2af3263339cf7183bdb6ee0ac1f8
> change-id: 20240116-mt8183-kukui-cbas-remove-657b62aeced6
> 
> Best regards,