linux-kernel - [PATCH] arm64: dts: qcom: x1e78100-t14s: Enable fingerprint reader

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Message-Id: <20250107-x1e80100-t14-enable-fingerprint-sensor-v1-1-8fd911d39ad1@linaro.org>
Date: Tue, 07 Jan 2025 15:35:07 +0200
From: Abel Vesa <abel.vesa@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: Johan Hovold <johan@...nel.org>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, 
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Abel Vesa <abel.vesa@...aro.org>
Subject: [PATCH] arm64: dts: qcom: x1e78100-t14s: Enable fingerprint reader

On Lenovo ThinkPad T14s, the fingerprint reader placed in the power
button is connected via the usb_2 controller. The controller has only
a USB 2.0 PHY which is then connected via a NXP PTN3222 eUSB2 repeater,
which in turn is connected to the Goodix fingerprint reader.

So enable all the usb_2 controller and PHY nodes, set dual-role mode to
host and describe the eUSB2 repeater in order to get the fingerprint
reader discovered.

Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
---
 .../dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts     | 39 ++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
index 9bb6994cc482e28e3e78817adf7ef15421f63219..b2c2347f54fa65f9355f0d7c008119e95bb64fb2 100644
--- a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
+++ b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
@@ -612,6 +612,20 @@ &i2c5 {
 
 	status = "okay";
 
+	eusb5_repeater: redriver@43 {
+		compatible = "nxp,ptn3222";
+		reg = <0x43>;
+		#phy-cells = <0>;
+
+		vdd3v3-supply = <&vreg_l13b_3p0>;
+		vdd1v8-supply = <&vreg_l4b_1p8>;
+
+		reset-gpios = <&tlmm 7 GPIO_ACTIVE_LOW>;
+
+		pinctrl-0 = <&eusb5_reset_n>;
+		pinctrl-names = "default";
+	};
+
 	eusb3_repeater: redriver@47 {
 		compatible = "nxp,ptn3222";
 		reg = <0x47>;
@@ -884,6 +898,14 @@ eusb3_reset_n: eusb3-reset-n-state {
 		output-low;
 	};
 
+	eusb5_reset_n: eusb5-reset-n-state {
+		pins = "gpio7";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-disable;
+		output-low;
+	};
+
 	eusb6_reset_n: eusb6-reset-n-state {
 		pins = "gpio184";
 		function = "gpio";
@@ -1058,6 +1080,23 @@ &usb_1_ss1_qmpphy_out {
 	remote-endpoint = <&pmic_glink_ss1_ss_in>;
 };
 
+&usb_2 {
+	status = "okay";
+};
+
+&usb_2_dwc3 {
+	dr_mode = "host";
+};
+
+&usb_2_hsphy {
+	vdd-supply = <&vreg_l2e_0p8>;
+	vdda12-supply = <&vreg_l3e_1p2>;
+
+	phys = <&eusb5_repeater>;
+
+	status = "okay";
+};
+
 &usb_mp {
 	status = "okay";
 };

---
base-commit: 7b4b9bf203da94fbeac75ed3116c84aa03e74578
change-id: 20250107-x1e80100-t14-enable-fingerprint-sensor-a517aaa46576

Best regards,
-- 
Abel Vesa <abel.vesa@...aro.org>