3 files changed, 15 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/usb/tegra-usb.txt b/Documentation/devicetree/bindings/usb/tegra-usb.txt
index 035d63d5646d..007005ddbe12 100644
--- a/Documentation/devicetree/bindings/usb/tegra-usb.txt
+++ b/Documentation/devicetree/bindings/usb/tegra-usb.txt
@@ -11,3 +11,16 @@ Required properties :
  - phy_type : Should be one of "ulpi" or "utmi".
  - nvidia,vbus-gpio : If present, specifies a gpio that needs to be
    activated for the bus to be powered.
+
+Optional properties:
+  - dr_mode : dual role mode. Indicates the working mode for
+   nvidia,tegra20-ehci compatible controllers.  Can be "host", "peripheral",
+   or "otg".  Default to "host" if not defined for backward compatibility.
+      host means this is a host controller
+      peripheral means it is device controller
+      otg means it can operate as either ("on the go")
+  - nvidia,has-legacy-mode : boolean indicates whether this controller can
+    operate in legacy mode (as APX 2500 / 2600). In legacy mode some
+    registers are accessed through the APB_MISC base address instead of
+    the USB controller. Since this is a legacy issue it probably does not
+    warrant a compatible string of its own.
diff --git a/arch/arm/boot/dts/tegra-seaboard.dts b/arch/arm/boot/dts/tegra-seaboard.dts
index 876d5c92ce36..dbf1c5a171c2 100644
--- a/arch/arm/boot/dts/tegra-seaboard.dts
+++ b/arch/arm/boot/dts/tegra-seaboard.dts
@@ -112,6 +112,7 @@
 
         usb@c5000000 {
                 nvidia,vbus-gpio = <&gpio 24 0>; /* PD0 */
+                dr_mode = "otg";
         };
 
         gpio-keys {
diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi
index d2bc7e7ad06d..f29978ecaebe 100644
--- a/arch/arm/boot/dts/tegra20.dtsi
+++ b/arch/arm/boot/dts/tegra20.dtsi
@@ -188,6 +188,7 @@
                 reg = <0xc5000000 0x4000>;
                 interrupts = < 0 20 0x04 >;
                 phy_type = "utmi";
+                nvidia,has-legacy-mode;
         };
 
         usb@c5004000 {