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The USB 3.0 PHY modules of R-Car Gen3 SoCs have: - Spread spectrum clock (ssc). - Using USB 2.0 EXTAL clock instead of USB 3.0 clock. - Enabling VBUS detection for usb3.0 peripheral. So, this driver supports these features. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>