linux-kernel - [PATCH 2/2] ARM: dts: Enable USB 3503 hub on exynos5420-peach-pit

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Date:	Mon,  5 May 2014 18:00:56 +0530
From:	Vivek Gautam <gautam.vivek@...sung.com>
To:	linux-usb@...r.kernel.org, linux-samsung-soc@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, kgene.kim@...sung.com,
	arunkk.samsung@...il.com, Vivek Gautam <gautam.vivek@...sung.com>
Subject: [PATCH 2/2] ARM: dts: Enable USB 3503 hub on exynos5420-peach-pit

The exynos5420-peach-pit 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@...sung.com>
---

Based on 'for-next' branch of kgene's linux-samsung tree with
following patch:
[PATCH v4 2/2] ARM: dts: Add peach-pit board support
http://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg29950.html

 arch/arm/boot/dts/exynos5420-peach-pit.dts |   14 ++++++++++++++
 arch/arm/boot/dts/exynos5420-pinctrl.dtsi  |    7 +++++++
 2 files changed, 21 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5420-peach-pit.dts b/arch/arm/boot/dts/exynos5420-peach-pit.dts
index fae33dd..24c1e87 100644
--- a/arch/arm/boot/dts/exynos5420-peach-pit.dts
+++ b/arch/arm/boot/dts/exynos5420-peach-pit.dts
@@ -58,6 +58,20 @@
 		pinctrl-0 = <&pwm0_out>;
 		pinctrl-names = "default";
 	};
+
+	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 = <&gpx2 4 1>;
+			pinctrl-0 = <&usb_hub_reset>;
+			pinctrl-names = "default";
+		};
+	};
 };
 
 &pinctrl_0 {
diff --git a/arch/arm/boot/dts/exynos5420-pinctrl.dtsi b/arch/arm/boot/dts/exynos5420-pinctrl.dtsi
index e62c8eb..8add143 100644
--- a/arch/arm/boot/dts/exynos5420-pinctrl.dtsi
+++ b/arch/arm/boot/dts/exynos5420-pinctrl.dtsi
@@ -66,6 +66,13 @@
 			samsung,pin-pud = <0>;
 			samsung,pin-drv = <0>;
 		};
+
+		usb_hub_reset: usb-hub-reset {
+			samsung,pins = "gpx2-4";
+			samsung,pin-function = <1>;
+			samsung,pin-pud = <0>;
+			samsung,pin-drv = <0>;
+		};
 	};
 
 	pinctrl@...10000 {
-- 
1.7.10.4

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