linux-kernel - [PATCH 3/3] arm64: dts: qcom: sdm845-oneplus: add tri-state-key

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Message-Id: <20230118234638.189098-4-soyer@irl.hu>
Date:   Thu, 19 Jan 2023 00:46:38 +0100
From:   Gergo Koteles <soyer@....hu>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Jonathan Corbet <corbet@....net>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        Caleb Connolly <caleb@...nolly.tech>,
        Gergo Koteles <soyer@....hu>
Subject: [PATCH 3/3] arm64: dts: qcom: sdm845-oneplus: add tri-state-key

The tri-state-key is a sound profile switch found on the OnePlus 6,
Android maps the states to "mute", "vibrate" and "ring", expose them as
ABS_SND_PROFILE events.
The previous GPIO numbers were wrong, the patch updates them to the correct
ones.

Co-developed-by: Caleb Connolly <caleb@...nolly.tech>
Signed-off-by: Caleb Connolly <caleb@...nolly.tech>
Signed-off-by: Gergo Koteles <soyer@....hu>
---
 .../boot/dts/qcom/sdm845-oneplus-common.dtsi  | 43 ++++++++++++++++++-
 1 file changed, 41 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi b/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
index 42cf4dd5ea28..33215ad17513 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
@@ -49,6 +49,44 @@ key-vol-up {
 		};
 	};
 
+	tri-state-key {
+		compatible = "gpio-keys";
+		label = "Tri-state key";
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&tri_state_key_default>;
+
+		state-top {
+			label = "Tri-state key top";
+			linux,input-type = <EV_ABS>;
+			linux,code = <ABS_SND_PROFILE>;
+			linux,input-value = <0>;
+			gpios = <&tlmm 126 GPIO_ACTIVE_LOW>;
+			debounce-interval = <50>;
+			linux,can-disable;
+		};
+
+		state-middle {
+			label = "Tri-state key middle";
+			linux,input-type = <EV_ABS>;
+			linux,code = <ABS_SND_PROFILE>;
+			linux,input-value = <1>;
+			gpios = <&tlmm 52 GPIO_ACTIVE_LOW>;
+			debounce-interval = <50>;
+			linux,can-disable;
+		};
+
+		state-bottom {
+			label = "Tri-state key bottom";
+			linux,input-type = <EV_ABS>;
+			linux,code = <ABS_SND_PROFILE>;
+			linux,input-value = <2>;
+			gpios = <&tlmm 24 GPIO_ACTIVE_LOW>;
+			debounce-interval = <50>;
+			linux,can-disable;
+		};
+	};
+
 	reserved-memory {
 		/*
 		 * The rmtfs_mem needs to be guarded due to "XPU limitations"
@@ -588,9 +626,10 @@ &usb_1_hsphy {
 &tlmm {
 	gpio-reserved-ranges = <0 4>, <81 4>;
 
-	tri_state_key_default: tri_state_key_default {
+	// The GPIOs have a hardware pullup.
+	tri_state_key_default: tri-state-pins {
 		mux {
-			pins = "gpio40", "gpio42", "gpio26";
+			pins = "gpio126", "gpio52", "gpio24";
 			function = "gpio";
 			drive-strength = <2>;
 			bias-disable;
-- 
2.39.0