From patchwork Fri Dec 14 06:59:07 2012
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Subject: [1/2] arm: tegra: Add new DT property to USB node.
Date: Thu, 13 Dec 2012 20:59:07 -0000
From: Venu Byravarasu <vbyravarasu@nvidia.com>
X-Patchwork-Id: 206361
Message-Id: <1355468348-8821-2-git-send-email-vbyravarasu@nvidia.com>
To: <grant.likely@secretlab.ca>, <rob.herring@calxeda.com>,
 <rob@landley.net>, <swarren@wwwdotorg.org>,
 <linux@arm.linux.org.uk>, <stern@rowland.harvard.edu>,
 <gregkh@linuxfoundation.org>, <sjg@chromium.org>, <olof@lixom.net>
Cc: <linux-kernel@vger.kernel.org>,
 <devicetree-discuss@lists.ozlabs.org>, <linux-doc@vger.kernel.org>,
 <linux-tegra@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>,
 <linux-usb@vger.kernel.org>, Venu Byravarasu <vbyravarasu@nvidia.com>

As Tegra USB host driver is using instance number for resetting
PORT0 twice, adding a new DT property for handling this.

Signed-off-by: Venu Byravarasu <vbyravarasu@nvidia.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>

---
.../bindings/usb/nvidia,tegra20-ehci.txt           |    2 ++
 arch/arm/boot/dts/tegra20.dtsi                     |    1 +
 2 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/nvidia,tegra20-ehci.txt b/Documentation/devicetree/bindings/usb/nvidia,tegra20-ehci.txt
index e9b005d..443a2b4 100644
--- a/Documentation/devicetree/bindings/usb/nvidia,tegra20-ehci.txt
+++ b/Documentation/devicetree/bindings/usb/nvidia,tegra20-ehci.txt
@@ -27,3 +27,5 @@ Optional properties:
     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.
+  - nvidia,needs-double-reset : boolean is to be set for some of the Tegra2
+    USB ports, which need reset twice due to hardware issues.
diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi
index b8effa1..3ebbd0c 100644
--- a/arch/arm/boot/dts/tegra20.dtsi
+++ b/arch/arm/boot/dts/tegra20.dtsi
@@ -364,6 +364,7 @@
 		phy_type = "utmi";
 		nvidia,has-legacy-mode;
 		status = "disabled";
+		nvidia,needs-double-reset;
 	};
 
 	usb@c5004000 {