linux-kernel - [PATCH v3 4/4] arm64: dts: qcom: msm8916-samsung-e2015: Add touchkey

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Date:   Tue, 19 Jul 2022 13:01:57 +0000
From:   "Lin, Meng-Bo" <linmengbo0689@...tonmail.com>
To:     devicetree@...r.kernel.org
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.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, linux-kernel@...r.kernel.org,
        Stephan Gerhold <stephan@...hold.net>,
        Nikita Travkin <nikita@...n.ru>,
        ~postmarketos/upstreaming@...ts.sr.ht
Subject: [PATCH v3 4/4] arm64: dts: qcom: msm8916-samsung-e2015: Add touchkey

On the Samsung Galaxy E5 and E7 the touch key is supplied by a single
fixed regulator (enabled via GPIO 97) that supplies both MCU and LED.
Add it to the device tree.

Signed-off-by: Lin, Meng-Bo <linmengbo0689@...tonmail.com>
---
 .../qcom/msm8916-samsung-e2015-common.dtsi    | 26 +++++++++++++++++++
 .../dts/qcom/msm8916-samsung-grandmax.dts     |  4 +++
 2 files changed, 30 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/msm8916-samsung-e2015-common.dtsi b/arch/arm64/boot/dts/qcom/msm8916-samsung-e2015-common.dtsi
index 373154ee2643..9f3aca17130d 100644
--- a/arch/arm64/boot/dts/qcom/msm8916-samsung-e2015-common.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8916-samsung-e2015-common.dtsi
@@ -19,6 +19,19 @@ muic: extcon@14 {
 		};
 	};

+	reg_touch_key: regulator-touch-key {
+		compatible = "regulator-fixed";
+		regulator-name = "touch_key";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpio = <&msmgpio 97 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&tkey_en_default>;
+	};
+
 	vibrator: vibrator {
 		compatible = "gpio-vibrator";
 		enable-gpios = <&msmgpio 76 GPIO_ACTIVE_HIGH>;
@@ -28,6 +41,11 @@ vibrator: vibrator {
 	};
 };

+&touchkey {
+	vcc-supply = <&reg_touch_key>;
+	vdd-supply = <&reg_touch_key>;
+};
+
 &msmgpio {
 	motor_en_default: motor-en-default {
 		pins = "gpio76";
@@ -36,4 +54,12 @@ motor_en_default: motor-en-default {
 		drive-strength = <2>;
 		bias-disable;
 	};
+
+	tkey_en_default: tkey-en-default {
+		pins = "gpio97";
+		function = "gpio";
+
+		drive-strength = <2>;
+		bias-disable;
+	};
 };
diff --git a/arch/arm64/boot/dts/qcom/msm8916-samsung-grandmax.dts b/arch/arm64/boot/dts/qcom/msm8916-samsung-grandmax.dts
index 41aada4bfb80..f68dd3d69a33 100644
--- a/arch/arm64/boot/dts/qcom/msm8916-samsung-grandmax.dts
+++ b/arch/arm64/boot/dts/qcom/msm8916-samsung-grandmax.dts
@@ -27,6 +27,10 @@ / {
 	/delete-node/ i2c-tkey;
 };

+&reg_touch_key {
+	status = "disabled";
+};
+
 &vibrator {
 	enable-gpios = <&msmgpio 72 GPIO_ACTIVE_HIGH>;
 };
--
2.30.2