linux-kernel - Re: [PATCH] arm64: dts: qcom: sc8280xp-lenovo-thinkpad-x13s: Add LID switch

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Message-ID: <YuzXgGQkLEqwqp31@hovoldconsulting.com>
Date:   Fri, 5 Aug 2022 10:40:32 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: sc8280xp-lenovo-thinkpad-x13s: Add LID
 switch

On Sat, Jul 30, 2022 at 12:36:17PM -0700, Bjorn Andersson wrote:
> Add gpio-keys for exposing the LID switch state.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
>  .../qcom/sc8280xp-lenovo-thinkpad-x13s.dts    | 25 +++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
> index 84dc92dda0b8..f3246cc13d15 100644
> --- a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
> +++ b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
> @@ -7,6 +7,8 @@
>  /dts-v1/;
>  
>  #include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/input/gpio-keys.h>
> +#include <dt-bindings/input/input.h>
>  #include <dt-bindings/regulator/qcom,rpmh-regulator.h>
>  
>  #include "sc8280xp.dtsi"
> @@ -26,6 +28,21 @@ backlight {
>  		pinctrl-0 = <&edp_bl_en>, <&edp_bl_pwm>;
>  	};
>  
> +	gpio-keys {
> +		compatible = "gpio-keys";
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&hall_int_state>;
> +
> +		switch-lid {
> +			gpios = <&tlmm 107 GPIO_ACTIVE_LOW>;
> +			linux,input-type = <EV_SW>;
> +			linux,code = <SW_LID>;
> +			wakeup-source;
> +			wakeup-event-action = <EV_ACT_DEASSERTED>;
> +		};
> +	};
> +
>  	vreg_edp_bl: regulator-edp-bl {
>  		compatible = "regulator-fixed";
>  
> @@ -347,6 +364,14 @@ reset {
>  		};
>  	};
>  
> +	hall_int_state: hall-int-state {

This node should go before the keyboard node to maintain the sort order.

Also, none of the other labels have a "state" suffix and the other
active-low pin node names have a "-n" suffix.

So I believe this should be

	hall_int_n: hall-int-n-state

for consistency.

> +		pins = "gpio107";
> +		function = "gpio";
> +

Newline not needed (nor used in the other nodes).

> +		input-enable;
> +		bias-disable;
> +	};
> +
>  	qup0_i2c4_default: qup0-i2c4-default-state {
>  		pins = "gpio171", "gpio172";
>  		function = "qup4";

Looks good otherwise and appears to work as intended:

Reviewed-by: Johan Hovold <johan+linaro@...nel.org>
Tested-by: Johan Hovold <johan+linaro@...nel.org>

Johan