ARM: dts: keystone: specify usb mode explicitly

The USB OTG mode is not supported by Kestone 2 devices, as result, the
USB devices enumeration and detection will not work properly when
kernel is built with CONFIG_USB_DWC3_DUAL_ROLE=y (default for multi
platform build):
 - it's required to load gadget drivers manually to make host mode
work and this confuses current Keystone 2 users
 - device mode is not working, because port can't detect and switch to
peripheral/host mode dynamically.

Hence, specify usb mode explicitly in DT: usb0 = "host" for all KS2
devices and usb1 = "peripheral" for K2E.

Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Roger Quadros <rogerq@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>

arch/arm/boot/dts/keystone-k2e-evm.dts

@@ -47,18 +47,26 @@ &usb_phy {
 	status = "okay";
 };
 
-&usb {
+&keystone_usb0 {
 	status = "okay";
 };
 
+&usb0 {
+	dr_mode = "host";
+};
+
 &usb1_phy {
 	status = "okay";
 };
 
-&usb1 {
+&keystone_usb1 {
 	status = "okay";
 };
 
+&usb1 {
+	dr_mode = "peripheral";
+};
+
 &i2c0 {
 	dtt@50 {
 		compatible = "at,24c1024";

arch/arm/boot/dts/keystone-k2e.dtsi

@@ -61,7 +61,7 @@ usb1_phy: usb_phy@2620750 {
 			status = "disabled";
 		};
 
-		usb1: usb@25000000 {
+		keystone_usb1: usb@25000000 {
 			compatible = "ti,keystone-dwc3";
 			#address-cells = <1>;
 			#size-cells = <1>;
@@ -74,7 +74,7 @@ usb1: usb@25000000 {
 			dma-ranges;
 			status = "disabled";
 
-			dwc3@25010000 {
+			usb1: dwc3@25010000 {
 				compatible = "synopsys,dwc3";
 				reg = <0x25010000 0x70000>;
 				interrupts = <GIC_SPI 414 IRQ_TYPE_EDGE_RISING>;

arch/arm/boot/dts/keystone-k2hk-evm.dts

@@ -83,10 +83,14 @@ &usb_phy {
 	status = "okay";
 };
 
-&usb {
+&keystone_usb0 {
 	status = "okay";
 };
 
+&usb0 {
+	dr_mode = "host";
+};
+
 &aemif {
 	cs0 {
 		#address-cells = <2>;

arch/arm/boot/dts/keystone-k2l-evm.dts

@@ -32,10 +32,14 @@ &usb_phy {
 	status = "okay";
 };
 
-&usb {
+&keystone_usb0 {
 	status = "okay";
 };
 
+&usb0 {
+	dr_mode = "host";
+};
+
 &i2c0 {
 	dtt@50 {
 		compatible = "at,24c1024";

arch/arm/boot/dts/keystone.dtsi

@@ -196,7 +196,7 @@ usb_phy: usb_phy@2620738 {
 			status = "disabled";
 		};
 
-		usb: usb@2680000 {
+		keystone_usb0: usb@2680000 {
 			compatible = "ti,keystone-dwc3";
 			#address-cells = <1>;
 			#size-cells = <1>;
@@ -209,7 +209,7 @@ usb: usb@2680000 {
 			dma-ranges;
 			status = "disabled";
 
-			dwc3@2690000 {
+			usb0: dwc3@2690000 {
 				compatible = "synopsys,dwc3";
 				reg = <0x2690000 0x70000>;
 				interrupts = <GIC_SPI 393 IRQ_TYPE_EDGE_RISING>;