1*b257464bSSimon GlassTegra SOC USB controllers 2*b257464bSSimon Glass 3*b257464bSSimon GlassThe device node for a USB controller that is part of a Tegra 4*b257464bSSimon GlassSOC is as described in the document "Open Firmware Recommended 5*b257464bSSimon GlassPractice : Universal Serial Bus" with the following modifications 6*b257464bSSimon Glassand additions : 7*b257464bSSimon Glass 8*b257464bSSimon GlassRequired properties : 9*b257464bSSimon Glass - compatible : Should be "nvidia,tegra20-ehci" for USB controllers 10*b257464bSSimon Glass used in host mode. 11*b257464bSSimon Glass - phy_type : Should be one of "ulpi" or "utmi". 12*b257464bSSimon Glass - nvidia,vbus-gpio : If present, specifies a gpio that needs to be 13*b257464bSSimon Glass activated for the bus to be powered. 14