arm64: dts: imx8qm-mek: switch Type-C connector power-role to dual

When attach to PC Type-A port, the USB device controller does not function
at all. Because it is configured as source-only and a Type-A port doesn't
support PD capability, a data role swap is impossible.

Actually, PTN5110THQ is configured for Source role only at POR, but after
POR it can operate as a DRP (Dual-Role Power). By switching the power-role
to dual, the port can operate as a sink and enter device mode when attach
to Type-A port.

Since the board design uses EN_SRC to control the 5V VBUS path and EN_SNK
to control the 12V VBUS output, to avoid outputting a higher VBUS when in
sink role, we set the operation current limit to 0mA so that SW will not
control EN_SNK at all.

Fixes: b237975 ("arm64: dts: imx8qm-mek: add usb 3.0 and related type C nodes")
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>

Author: Xu Yang

arch/arm64/boot/dts/freescale/imx8qm-mek.dts

@@ -611,9 +611,17 @@
 		usb_con1: connector {
 			compatible = "usb-c-connector";
 			label = "USB-C";
-			power-role = "source";
+			power-role = "dual";
 			data-role = "dual";
+			try-power-role = "sink";
 			source-pdos = <PDO_FIXED(5000, 3000, PDO_FIXED_USB_COMM)>;
+			/*
+			 * Set operational current to 0mA as we don't want EN_SNK
+			 * enable 12V VBUS switch when it work as a sink.
+			 */
+			sink-pdos = <PDO_FIXED(5000, 0, PDO_FIXED_USB_COMM)>;
+			op-sink-microwatt = <0>;
+			self-powered;
 
 			ports {
 				#address-cells = <1>;