linux-kernel - [PATCH 2/2] arm64: dts: ti: k3-am642-evm: Add USB support

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Message-ID: <20210301055109.17626-3-a-govindraju@ti.com>
Date:   Mon, 1 Mar 2021 11:21:09 +0530
From:   Aswath Govindraju <a-govindraju@...com>
To:     unlisted-recipients:; (no To-header on input)
CC:     Vignesh Raghavendra <vigneshr@...com>,
        Lokesh Vutla <lokeshvutla@...com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Aswath Govindraju <a-govindraju@...com>,
        Nishanth Menon <nm@...com>, Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/2] arm64: dts: ti: k3-am642-evm: Add USB support

AM64 EVM board has a micro USB 2.0 AB connector and the USB0_VBUS is
connected with a resistor divider in between. USB0_DRVVBUS pin is muxed
between USB0_DRVVBUS and GPIO1_79 signals.

Add the corresponding properties and set the pinmux mode for USB subsystem
in the evm dts file.

Signed-off-by: Aswath Govindraju <a-govindraju@...com>
Acked-by: Roger Quadros <rogerq@...com>
---
 arch/arm64/boot/dts/ti/k3-am642-evm.dts | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm.dts b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
index 1f1787750fef..bfd849a29655 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
@@ -133,6 +133,12 @@
 			AM64X_IOPAD(0x026c, PIN_INPUT_PULLUP, 0) /* (B19) I2C1_SDA */
 		>;
 	};
+
+	main_usb0_pins_default: main-usb0-pins-default {
+		pinctrl-single,pins = <
+			AM64X_IOPAD(0x02a8, PIN_OUTPUT, 0) /* (E19) USB0_DRVVBUS */
+		>;
+	};
 };
 
 &main_uart0 {
@@ -227,6 +233,18 @@
 	status = "disabled";
 };
 
+&usbss0 {
+	ti,vbus-divider;
+	ti,usb2-only;
+};
+
+&usb0 {
+	dr_mode = "otg";
+	maximum-speed = "high-speed";
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_usb0_pins_default>;
+};
+
 &sdhci0 {
 	/* emmc */
 	bus-width = <8>;
-- 
2.17.1