arm/dt: add basic usb nodes to tegra device trees

For now they are a minimal binding. It needs to be amended with
vendor-specific settings for phy setup and link tuning, etc.

v2: Added bindings specification and phy_type properties

Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Stephen Warren <swarren@nvidia.com>

3 files changed, 38 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/usb/tegra-usb.txt b/Documentation/devicetree/bindings/usb/tegra-usb.txt
new file mode 100644
index 000000000000..035d63d5646d
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/tegra-usb.txt
@@ -0,0 +1,13 @@
+Tegra SOC USB controllers
+
+The device node for a USB controller that is part of a Tegra
+SOC is as described in the document "Open Firmware Recommended
+Practice : Universal Serial Bus" with the following modifications
+and additions :
+
+Required properties :
+ - compatible : Should be "nvidia,tegra20-ehci" for USB controllers
+   used in host mode.
+ - 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.
diff --git a/arch/arm/boot/dts/tegra-seaboard.dts b/arch/arm/boot/dts/tegra-seaboard.dts
index a72299b8e668..88c682a26cb2 100644
--- a/arch/arm/boot/dts/tegra-seaboard.dts
+++ b/arch/arm/boot/dts/tegra-seaboard.dts
@@ -29,4 +29,8 @@
         sdhci@c8000600 {
                 support-8bit;
         };
+
+        usb@c5000000 {
+                nvidia,vbus-gpio = <&gpio 24 0>; /* PD0 */
+        };
 };
diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi
index 65d7e6a333eb..795b921d92fc 100644
--- a/arch/arm/boot/dts/tegra20.dtsi
+++ b/arch/arm/boot/dts/tegra20.dtsi
@@ -143,5 +143,26 @@
                 reg = <0xc8000600 0x200>;
                 interrupts = < 63 >;
         };
+
+        usb@c5000000 {
+                compatible = "nvidia,tegra20-ehci", "usb-ehci";
+                reg = <0xc5000000 0x4000>;
+                interrupts = < 52 >;
+                phy_type = "utmi";
+        };
+
+        usb@c5004000 {
+                compatible = "nvidia,tegra20-ehci", "usb-ehci";
+                reg = <0xc5004000 0x4000>;
+                interrupts = < 53 >;
+                phy_type = "ulpi";
+        };
+
+        usb@c5008000 {
+                compatible = "nvidia,tegra20-ehci", "usb-ehci";
+                reg = <0xc5008000 0x4000>;
+                interrupts = < 129 >;
+                phy_type = "utmi";
+        };
 };