Describe ThinkPad Embedded Controller in the T14s device tree,
which adds LED and special key support.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
---
 .../dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi    | 23 ++++++++++++++++++++++
 1 file changed, 23 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..7a9ec0c33b3ca847c5496e3ec145c70ccb7a3fe3 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 +887,23 @@ eusb6_repeater: redriver@4f {
 	};
 };
 
+&i2c6 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	ec@28 {
+		compatible = "lenovo,thinkpad-t14s-ec";
+		reg = <0x28>;
+
+		interrupts-extended = <&tlmm 66 IRQ_TYPE_LEVEL_LOW>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&ec_int_n_default>;
+
+		wakeup-source;
+	};
+};
+
 &i2c7 {
 	clock-frequency = <400000>;
 
@@ -1267,6 +1284,12 @@ &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";

-- 
2.50.1

On 8/31/25 11:28 PM, Sebastian Reichel wrote:
> Describe ThinkPad Embedded Controller in the T14s device tree,
> which adds LED and special key support.
> 
> Signed-off-by: Sebastian Reichel <sre@kernel.org>
> ---
>  .../dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi    | 23 ++++++++++++++++++++++
>  1 file changed, 23 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..7a9ec0c33b3ca847c5496e3ec145c70ccb7a3fe3 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 +887,23 @@ eusb6_repeater: redriver@4f {
>  	};
>  };
>  
> +&i2c6 {
> +	clock-frequency = <400000>;
> +	status = "okay";

a newline before 'status' is common practice> +
> +	ec@28 {

embedded-controller@

> +		compatible = "lenovo,thinkpad-t14s-ec";
> +		reg = <0x28>;
> +
> +		interrupts-extended = <&tlmm 66 IRQ_TYPE_LEVEL_LOW>;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&ec_int_n_default>;

property-n
property-names

in this order, please

Konrad