linux-kernel - [PATCH] arm64: dts: freescale: ten64: add usb hub definition

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Message-ID: <20250129045352.10728-1-matt@traverse.com.au>
Date: Wed, 29 Jan 2025 15:53:52 +1100
From: Mathew McBride <matt@...verse.com.au>
To: devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Shawn Guo <shawnguo@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>
Cc: Mathew McBride <matt@...verse.com.au>
Subject: [PATCH] arm64: dts: freescale: ten64: add usb hub definition

A device tree binding for the Microchip USB5744 hub controller
was added in commit 02be19e914b8 ("dt-bindings: usb: Add support
for Microchip usb5744 hub controller").

U-Boot will consume this binding in order to perform the
necessary actions to enable the USB hub ports over I2C.
(We previously used our own out-of-tree driver for
this task)

The Ten64 board does not have any switchable supplies
for the voltage rails utilized by the USB5744, so a
pair of dummy supplies have been added to facilitate
operation with U-Boot's hub driver.

Signed-off-by: Mathew McBride <matt@...verse.com.au>
---
 .../boot/dts/freescale/fsl-ls1088a-ten64.dts  | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1088a-ten64.dts b/arch/arm64/boot/dts/freescale/fsl-ls1088a-ten64.dts
index bc0d89427fbe5..fc15c83d222f6 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1088a-ten64.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1088a-ten64.dts
@@ -87,6 +87,22 @@ sfp_xg1: dpmac1-sfp {
 		los-gpios = <&sfpgpio 7 GPIO_ACTIVE_HIGH>;
 		maximum-power-milliwatt = <2000>;
 	};
+
+	usb1v2_supply: regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "usbhub_1v2";
+		regulator-min-microvolt = <1200000>;
+		regulator-max-microvolt = <1200000>;
+		regulator-always-on;
+	};
+
+	system3v3_supply: regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "system_3v3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+	};
 };
 
 /* XG1 - Upper SFP */
@@ -231,6 +247,12 @@ at97sc: tpm@29 {
 		compatible = "atmel,at97sc3204t";
 		reg = <0x29>;
 	};
+
+	usbhub: usb-hub@2d {
+		compatible = "microchip,usb5744";
+		reg = <0x2d>;
+	};
+
 };
 
 &i2c2 {
@@ -378,10 +400,33 @@ partition@...0000 {
 	};
 };
 
+/* LS1088A USB Port 0 - direct to bottom USB-A port */
 &usb0 {
 	status = "okay";
 };
 
+/* LS1088A USB Port 1 - to Microchip USB5744 USB Hub */
 &usb1 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
 	status = "okay";
+
+	hub_2_0: hub@1 {
+		compatible = "usb424,2744";
+		reg = <1>;
+		peer-hub = <&hub_3_0>;
+		i2c-bus = <&usbhub>;
+		vdd-supply = <&system3v3_supply>;
+		vdd2-supply = <&usb1v2_supply>;
+	};
+
+	hub_3_0: hub@2 {
+		compatible = "usb424,5744";
+		reg = <2>;
+		peer-hub = <&hub_2_0>;
+		i2c-bus = <&usbhub>;
+		vdd-supply = <&system3v3_supply>;
+		vdd2-supply = <&usb1v2_supply>;
+	};
 };
-- 
2.45.1