linux-kernel - Re: [PATCH v2 3/3] arm64: dts: qcom: x1e80100-t14s: add EC

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Message-ID: <df705089-0554-4044-87c8-d2bd16da3ee8@linaro.org>
Date: Fri, 5 Sep 2025 10:26:00 +0100
From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To: Sebastian Reichel <sre@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Hans de Goede <hansg@...nel.org>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
 Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>,
 Mark Pearson <mpearson-lenovo@...ebb.ca>
Cc: "Derek J. Clark" <derekjohn.clark@...il.com>,
 Henrique de Moraes Holschuh <hmh@....eng.br>,
 Neil Armstrong <neil.armstrong@...aro.org>, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
 linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v2 3/3] arm64: dts: qcom: x1e80100-t14s: add EC

On 05/09/2025 02:09, Sebastian Reichel wrote:
> Describe ThinkPad Embedded Controller in the T14s device tree,
> which adds LED and special key support.
> 
> Tested-by: Neil Armstrong <neil.armstrong@...aro.org> # on Thinkpad T14S OLED
> Signed-off-by: Sebastian Reichel <sre@...nel.org>
> ---
>   .../dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi    | 24 ++++++++++++++++++++++
>   1 file changed, 24 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
> index ac1dddf27da30e6a9f7e1d1ecbd5192bf2d0671e..f70489aba870289edbcf84ec22fdb004e010868b 100644
> --- a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
> +++ b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
> @@ -887,6 +887,24 @@ eusb6_repeater: redriver@4f {
>   	};
>   };
>   
> +&i2c6 {
> +	clock-frequency = <400000>;
> +
> +	status = "okay";
> +
> +	embedded-controller@28 {
> +		compatible = "lenovo,thinkpad-t14s-ec";
> +		reg = <0x28>;
> +
> +		interrupts-extended = <&tlmm 66 IRQ_TYPE_LEVEL_LOW>;
> +
> +		pinctrl-0 = <&ec_int_n_default>;
> +		pinctrl-names = "default";
> +
> +		wakeup-source;
> +	};
> +};
> +
>   &i2c7 {
>   	clock-frequency = <400000>;
>   
> @@ -1267,6 +1285,12 @@ &tlmm {
>   			       <72 2>, /* Secure EC I2C connection (?) */
>   			       <238 1>; /* UFS Reset */
>   
> +	ec_int_n_default: ec-int-n-state {
> +		pins = "gpio66";
> +		function = "gpio";
> +		bias-disable;
> +	};
> +
>   	eusb3_reset_n: eusb3-reset-n-state {
>   		pins = "gpio6";
>   		function = "gpio";
> 

Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>