linux-kernel - Re: [PATCH v2] arm64: dts: mt8183: kukui: Add Type C node

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Date:   Thu, 9 Dec 2021 15:04:42 -0800
From:   Benson Leung <bleung@...gle.com>
To:     Prashant Malani <pmalani@...omium.org>
Cc:     linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        Alexandru M Stan <amstan@...omium.org>,
        Benson Leung <bleung@...omium.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-arm-kernel@...ts.infradead.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH v2] arm64: dts: mt8183: kukui: Add Type C node

On Thu, Dec 09, 2021 at 11:51:12AM -0800, Prashant Malani wrote:
> Add a node describing the USB Type C connector, in order to utilize the
> Chromium OS USB Type-C driver that enumerates Type-C ports and connected
> cables/peripherals and makes them visible to userspace.
> 
> Cc: Alexandru M Stan <amstan@...omium.org>
> Cc: Benson Leung <bleung@...omium.org>
> Signed-off-by: Prashant Malani <pmalani@...omium.org>

Reviewed-by: Benson Leung <bleung@...omium.org>

> ---
> 
> Changes in v2:
> - Alexandru mentioned that HW specs suggest preferred power role for
>   devices like kukui to be sink, so changed try-power-role to "sink".
> 
>  arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
> index 94c13c459194..0f9480f91261 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
> @@ -886,6 +886,20 @@ usbc_extcon: extcon0 {
>  		cbas {
>  			compatible = "google,cros-cbas";
>  		};
> +
> +		typec {
> +			compatible = "google,cros-ec-typec";
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			usb_c0: connector@0 {
> +				compatible = "usb-c-connector";
> +				reg = <0>;
> +				power-role = "dual";
> +				data-role = "host";
> +				try-power-role = "sink";
> +			};
> +		};
>  	};
>  };
>  
> -- 
> 2.34.1.173.g76aa8bc2d0-goog
> 

-- 
Benson Leung
Staff Software Engineer
Chrome OS Kernel
Google Inc.
bleung@...gle.com
Chromium OS Project
bleung@...omium.org

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