linux-kernel - [PATCH] arm64: dts: qcom: qcs6490-rb3gen2: enable PMIC Volume and Power buttons

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Message-ID: <20240320121016.2878367-1-quic_uchheda@quicinc.com>
Date: Wed, 20 Mar 2024 17:40:16 +0530
From: Umang Chheda <quic_uchheda@...cinc.com>
To: <andersson@...nel.org>, <konrad.dybcio@...aro.org>, <robh@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>
CC: <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <quic_uchheda@...cinc.com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] arm64: dts: qcom: qcs6490-rb3gen2: enable PMIC Volume and Power buttons

The Volume Down & Power buttons are controlled by the PMIC via
the PON hardware, and the Volume Up is connected to a PMIC gpio.

Enable the necessary hardware and setup the GPIO state for the
Volume Up gpio key.

Signed-off-by: Umang Chheda <quic_uchheda@...cinc.com>
---
 arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 37 ++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
index 63ebe0774f1d..73f6d18d2331 100644
--- a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
+++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
@@ -9,6 +9,8 @@
 #define PM7250B_SID 8
 #define PM7250B_SID1 9
 
+#include <dt-bindings/input/linux-event-codes.h>
+#include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
 #include <dt-bindings/regulator/qcom,rpmh-regulator.h>
 #include "sc7280.dtsi"
 #include "pm7250b.dtsi"
@@ -39,6 +41,22 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		pinctrl-0 = <&key_vol_up_default>;
+		pinctrl-names = "default";
+
+		key-volume-up {
+			label = "Volume_up";
+			gpios = <&pm7325_gpios 6 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_VOLUMEUP>;
+			wakeup-source;
+			debounce-interval = <15>;
+			linux,can-disable;
+		};
+	};
+
 	reserved-memory {
 		xbl_mem: xbl@...00000 {
 			reg = <0x0 0x80700000 0x0 0x100000>;
@@ -471,6 +489,25 @@ &gcc {
 			   <GCC_WPSS_RSCP_CLK>;
 };
 
+&pm7325_gpios {
+	key_vol_up_default: key-vol-up-state {
+		pins = "gpio6";
+		function = "normal";
+		input-enable;
+		bias-pull-up;
+		qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
+	};
+};
+
+&pon_pwrkey {
+	status = "okay";
+};
+
+&pon_resin {
+	linux,code = <KEY_VOLUMEDOWN>;
+	status = "okay";
+};
+
 &qupv3_id_0 {
 	status = "okay";
 };
-- 
2.25.1