Adding DWC3 device tree node for Exynos5250 needed to
parse device tree data.
Also enabling XHCI support on exynos5250.

Signed-off-by: Vivek Gautam <gautam.vi...@samsung.com>
---
 .../devicetree/bindings/usb/exynos-usb.txt         |   14 ++++++++++++++
 arch/arm/boot/dts/exynos5250.dtsi                  |    6 ++++++
 arch/arm/mach-exynos/Kconfig                       |    1 +
 3 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/exynos-usb.txt 
b/Documentation/devicetree/bindings/usb/exynos-usb.txt
index f66fcdd..d660410 100644
--- a/Documentation/devicetree/bindings/usb/exynos-usb.txt
+++ b/Documentation/devicetree/bindings/usb/exynos-usb.txt
@@ -38,3 +38,17 @@ Example:
                reg = <0x12120000 0x100>;
                interrupts = <0 71 0>;
        };
+
+DWC3
+Required properties:
+ - compatible: should be "samsung,exynos5250-dwc3" for USB 3.0 DWC3 controller.
+ - reg: physical base address of the controller and length of memory mapped
+   region.
+ - interrupts: interrupt number to the cpu.
+
+Example:
+       usb@12000000 {
+               compatible = "samsung,exynos5250-dwc3";
+               reg = <0x12000000 0x10000>;
+               interrupts = <0 72 0>;
+       };
diff --git a/arch/arm/boot/dts/exynos5250.dtsi 
b/arch/arm/boot/dts/exynos5250.dtsi
index ebb0907..a747524 100644
--- a/arch/arm/boot/dts/exynos5250.dtsi
+++ b/arch/arm/boot/dts/exynos5250.dtsi
@@ -275,6 +275,12 @@
                #size-cells = <0>;
        };
 
+       usb@12000000 {
+               compatible = "samsung,exynos5250-dwc3";
+               reg = <0x12000000 0x10000>;
+               interrupts = <0 72 0>;
+       };
+
        usb@12110000 {
                compatible = "samsung,exynos4210-ehci";
                reg = <0x12110000 0x100>;
diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index d26c9f9..e62fd20 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -428,6 +428,7 @@ config MACH_EXYNOS5_DT
        depends on ARCH_EXYNOS5
        select ARM_AMBA
        select USE_OF
+       select USB_ARCH_HAS_XHCI
        help
          Machine support for Samsung EXYNOS5 machine with device tree enabled.
          Select this if a fdt blob is available for the EXYNOS5 SoC based 
board.
-- 
1.7.6.5

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