18c2ecf20Sopenharmony_ciTegra SOC USB controllers 28c2ecf20Sopenharmony_ci 38c2ecf20Sopenharmony_ciThe device node for a USB controller that is part of a Tegra 48c2ecf20Sopenharmony_ciSOC is as described in the document "Open Firmware Recommended 58c2ecf20Sopenharmony_ciPractice : Universal Serial Bus" with the following modifications 68c2ecf20Sopenharmony_ciand additions : 78c2ecf20Sopenharmony_ci 88c2ecf20Sopenharmony_ciRequired properties : 98c2ecf20Sopenharmony_ci - compatible : For Tegra20, must contain "nvidia,tegra20-ehci". 108c2ecf20Sopenharmony_ci For Tegra30, must contain "nvidia,tegra30-ehci". Otherwise, must contain 118c2ecf20Sopenharmony_ci "nvidia,<chip>-ehci" plus at least one of the above, where <chip> is 128c2ecf20Sopenharmony_ci tegra114, tegra124, tegra132, or tegra210. 138c2ecf20Sopenharmony_ci - nvidia,phy : phandle of the PHY that the controller is connected to. 148c2ecf20Sopenharmony_ci - clocks : Must contain one entry, for the module clock. 158c2ecf20Sopenharmony_ci See ../clocks/clock-bindings.txt for details. 168c2ecf20Sopenharmony_ci - resets : Must contain an entry for each entry in reset-names. 178c2ecf20Sopenharmony_ci See ../reset/reset.txt for details. 188c2ecf20Sopenharmony_ci - reset-names : Must include the following entries: 198c2ecf20Sopenharmony_ci - usb 208c2ecf20Sopenharmony_ci 218c2ecf20Sopenharmony_ciOptional properties: 228c2ecf20Sopenharmony_ci - nvidia,needs-double-reset : boolean is to be set for some of the Tegra20 238c2ecf20Sopenharmony_ci USB ports, which need reset twice due to hardware issues. 24