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 : For Tegra20, must contain "nvidia,tegra20-ehci". For Tegra30, must contain "nvidia,tegra30-ehci". Otherwise, must contain "nvidia,-ehci" plus at least one of the above, where is tegra114, tegra124, tegra132, or tegra210. - nvidia,phy : phandle of the PHY that the controller is connected to. - clocks : Must contain one entry, for the module clock. See ../clocks/clock-bindings.txt for details. - resets : Must contain an entry for each entry in reset-names. See ../reset/reset.txt for details. - reset-names : Must include the following entries: - usb Optional properties: - nvidia,needs-double-reset : boolean is to be set for some of the Tegra20 USB ports, which need reset twice due to hardware issues.