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@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Roger Quadros <rogerq@ti.com>
Link: https://lore.kernel.org/r/20210317043007.18272-3-a-govindraju@ti.com

diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm.dts b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
index 25fa6fb..1365e31 100644 (file)
--- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
@@ -210,6 +210,12 @@
                        AM64X_IOPAD(0x0144, PIN_OUTPUT, 4) /* (Y11) PRG1_PRU1_GPO15.RGMII2_TX_CTL */
                >;
        };
+
+       main_usb0_pins_default: main-usb0-pins-default {
+               pinctrl-single,pins = <
+                       AM64X_IOPAD(0x02a8, PIN_OUTPUT, 0) /* (E19) USB0_DRVVBUS */
+               >;
+       };
 };
 
 &main_uart0 {
@@ -335,6 +341,18 @@
        disable-wp;
 };
 
+&usbss0 {
+       ti,vbus-divider;
+       ti,usb2-only;
+};
+
+&usb0 {
+       dr_mode = "otg";
+       maximum-speed = "high-speed";
+       pinctrl-names = "default";
+       pinctrl-0 = <&main_usb0_pins_default>;
+};
+
 &cpsw3g {
        pinctrl-names = "default";
        pinctrl-0 = <&mdio1_pins_default