linux-kernel - [PATCH] arm64: dts: qcom: sc8280xp-crd: add support for volume-up key

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Message-ID: <20250307171036.7276-1-johan+linaro@kernel.org>
Date: Fri,  7 Mar 2025 18:10:36 +0100
From: Johan Hovold <johan+linaro@...nel.org>
To: Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>
Cc: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Johan Hovold <johan+linaro@...nel.org>
Subject: [PATCH] arm64: dts: qcom: sc8280xp-crd: add support for volume-up key

Add support for the keypad volume-up key on the debug extension board.

This is useful to have when testing PMIC interrupt handling, and the key
can also be used to wake up from deep suspend states (CX shutdown).

Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
---
 arch/arm64/boot/dts/qcom/sc8280xp-crd.dts | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
index 75adaa19d1c3..8badf7f49b95 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
+++ b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
@@ -37,6 +37,20 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		pinctrl-0 = <&kypd_vol_up_n>;
+		pinctrl-names = "default";
+
+		key-vol-up {
+			label = "volume_up";
+			gpios = <&pmc8280_1_gpios 6 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_VOLUMEUP>;
+			wakeup-source;
+		};
+	};
+
 	pmic-glink {
 		compatible = "qcom,sc8280xp-pmic-glink", "qcom,pmic-glink";
 
@@ -885,6 +899,14 @@ edp_bl_reg_en: edp-bl-reg-en-state {
 		function = "normal";
 	};
 
+	kypd_vol_up_n: kypd-vol-up-n-state {
+		pins = "gpio6";
+		function = "normal";
+		power-source = <0>; /* 3.3 V */
+		bias-pull-up;
+		input-enable;
+	};
+
 	misc_3p3_reg_en: misc-3p3-reg-en-state {
 		pins = "gpio2";
 		function = "normal";
-- 
2.45.3