diff options
authorSimon Glass <>2012-02-28 08:07:47 +0000
committerAlbert ARIBAUD <>2012-03-29 08:12:48 +0200
commit8b7a47d73d26e562918021bf4027adcb660a1146 (patch)
parentb257464b1c7522d04650d8e2ab52ee7c1cafa7e4 (diff)
tegra: fdt: Add additional USB binding
This adds a property to indicate a port which can switch between host and device mode. Signed-off-by: Simon Glass <> Acked-by: Stephen Warren <> Signed-off-by: Tom Warren <>
1 files changed, 12 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/usb/tegra-usb.txt b/doc/device-tree-bindings/usb/tegra-usb.txt
index 035d63d564..5282d44ac0 100644
--- a/doc/device-tree-bindings/usb/tegra-usb.txt
+++ b/doc/device-tree-bindings/usb/tegra-usb.txt
@@ -11,3 +11,15 @@ Required properties :
- 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.
+Optional properties:
+ - dr_mode : dual role mode. Indicates the working mode for
+ nvidia,tegra20-ehci compatible controllers. Can be "host", "peripheral",
+ or "otg". Default to "host" if not defined for backward compatibility.
+ host means this is a host controller
+ peripheral means it is device controller
+ otg means it can operate as either ("on the go")
+ - nvidia,has-legacy-mode : boolean indicates whether this controller can
+ operate in legacy mode (as APX 2500 / 2600). In legacy mode some
+ registers are accessed through the APB_MISC base address instead of
+ the USB controller.
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