• Sergei Shtylyov's avatar
    phy: Renesas R-Car Gen2 PHY driver · 1233f59f
    Sergei Shtylyov authored
    This PHY, though formally being a part of Renesas USBHS controller, contains the
    UGCTRL2 register that controls multiplexing of the USB ports (Renesas calls them
    channels) to the different USB controllers: channel 0 can be connected to either
    PCI EHCI/OHCI or USBHS controllers, channel 2 can be connected to PCI EHCI/OHCI
    or xHCI controllers.
    
    This is a new driver for this USB PHY currently already supported under drivers/
    usb/phy/. The reason for writing the new driver was the requirement that the
    multiplexing  of USB channels to the controller be dynamic, depending on what
    USB drivers  are loaded,  rather than static as provided by the old driver. The
    infrastructure provided by drivers/phy/phy-core.c  seems to fit that purpose
    ideally. The new driver only  supports device tree probing  for now.
    Signed-off-by: default avatarSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
    Signed-off-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
    1233f59f
Makefile 1.49 KB