[PATCH 1/2] ARM: dts: Enable USB 3503 hub on exynos5250-snow

[Vivek Gautam]

The exynos5250-snow has a SMSC USB3503 connected in
hardware only mode like a PHY. Enable support for it,
and add necessary 'reset-gpio' for it.

This is in correspondance to similar patch by Mark Brown
7c1b0ec ARM: dts: Enable USB hub on Arndale

Signed-off-by: Vivek Gautam <gautam.vivek at samsung.com>
---

Based on 'for-next' branch of kgene's linux-samsung tree.

 arch/arm/boot/dts/exynos5250-pinctrl.dtsi |    7 +++++++
 arch/arm/boot/dts/exynos5250-snow.dts     |   14 ++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5250-pinctrl.dtsi b/arch/arm/boot/dts/exynos5250-pinctrl.dtsi
index 9a49e68..bd8c8f1 100644
--- a/arch/arm/boot/dts/exynos5250-pinctrl.dtsi
+++ b/arch/arm/boot/dts/exynos5250-pinctrl.dtsi
@@ -706,6 +706,13 @@
 			samsung,pin-pud = <0>;
 			samsung,pin-drv = <0>;
 		};
+
+		usb_hub_reset: usb-hub-reset {
+			samsung,pins = "gpe1-0";
+			samsung,pin-function = <1>;
+			samsung,pin-pud = <0>;
+			samsung,pin-drv = <0>;
+		};
 	};
 
 	pinctrl at 10d10000 {
diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
index 1ce1088..2e48f27 100644
--- a/arch/arm/boot/dts/exynos5250-snow.dts
+++ b/arch/arm/boot/dts/exynos5250-snow.dts
@@ -200,6 +200,20 @@
 		samsung,vbus-gpio = <&gpx1 1 0>;
 	};
 
+	usb_hub_bus {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		// SMSC USB3503 connected in hardware only mode as a PHY
+		usb_hub {
+			compatible = "smsc,usb3503a";
+			reset-gpios = <&gpe1 0 1>;
+			pinctrl-0 = <&usb_hub_reset>;
+			pinctrl-names = "default";
+		};
+	};
+
 	fixed-rate-clocks {
 		xxti {
 			compatible = "samsung,clock-xxti";
-- 
1.7.10.4