linux-kernel - [PATCH 3/3] arm64: dts: qcom: sm6125-xiaomi-laurel-sprout: Add Focaltech FT3518 touchscreen

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Message-Id: <20260113-touchscreen-patches-v1-3-a10957f32dd8@gmail.com>
Date: Tue, 13 Jan 2026 21:12:37 +0200
From: Yedaya Katsman via B4 Relay <devnull+yedaya.ka.gmail.com@...nel.org>
To: SzczurekYT <szczurek@...zurek.yt>, 
 Dmitry Torokhov <dmitry.torokhov@...il.com>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-input@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
 Yedaya Katsman <yedaya.ka@...il.com>
Subject: [PATCH 3/3] arm64: dts: qcom: sm6125-xiaomi-laurel-sprout: Add
 Focaltech FT3518 touchscreen

From: Yedaya Katsman <yedaya.ka@...il.com>

Add device tree node for the Focaltech FT3518 touchscreen on
Xiaomi Mi A3 (laurel-sprout).

Enable qupv3_id_0 and i2c2 bus that the touchscreen is on.

Co-developed-by: SzczurekYT <szczurek@...zurek.yt>
Signed-off-by: SzczurekYT <szczurek@...zurek.yt>
Signed-off-by: Yedaya Katsman <yedaya.ka@...il.com>
---
 .../boot/dts/qcom/sm6125-xiaomi-laurel-sprout.dts  | 34 ++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm6125-xiaomi-laurel-sprout.dts b/arch/arm64/boot/dts/qcom/sm6125-xiaomi-laurel-sprout.dts
index 994fb0412fcbdf5466f87a325c48b697a37b514b..97feed708d3b6483eab72cfb0ae39be6f5ae3a11 100644
--- a/arch/arm64/boot/dts/qcom/sm6125-xiaomi-laurel-sprout.dts
+++ b/arch/arm64/boot/dts/qcom/sm6125-xiaomi-laurel-sprout.dts
@@ -119,6 +119,18 @@ active-config0 {
 			};
 		};
 	};
+
+	ts_vdd_supply: ts-vdd-supply {
+		compatible = "regulator-fixed";
+		regulator-name = "ts_vdd_supply";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpio = <&tlmm 83 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		startup-delay-us = <70000>;
+	};
 };
 
 &hsusb_phy1 {
@@ -411,3 +423,25 @@ &usb3 {
 &usb3_dwc3 {
 	extcon = <&extcon_usb>;
 };
+
+&qupv3_id_0 {
+	status = "okay";
+};
+
+&i2c2 {
+	status = "okay";
+
+	touchscreen@38 {
+		compatible = "focaltech,ft3518";
+		reg = <0x38>;
+		interrupt-parent = <&tlmm>;
+		interrupts = <88 IRQ_TYPE_EDGE_FALLING>;
+
+		vcc-supply = <&ts_vdd_supply>;
+
+		reset-gpios = <&tlmm 87 GPIO_ACTIVE_LOW>;
+
+		touchscreen-size-x = <720>;
+		touchscreen-size-y = <1560>;
+	};
+};

-- 
2.52.0