• Yoshihiro Shimoda's avatar
    usb: gadget: udc: renesas_usb3: add support for usb role swap · cc995c9e
    Yoshihiro Shimoda authored
    This patch adds support for usb role swap via sysfs "role".
    
    For example:
     1) Connect a usb cable using 2 Salvator-X boards.
      - For A-Device, the cable is connected to CN11 (USB3.0 ch0).
      - For B-Device, the cable is connected to CN9 (USB2.0 ch0).
     2) On A-Device, you input the following command:
      # echo peripheral > /sys/devices/platform/soc/ee020000.usb/role
     3) On B-Device, you input the following command:
      # echo host > /sys/devices/platform/soc/ee080200.usb-phy/role
    
    Then, the A-Device acts as a peripheral and the B-Device acts as
    a host. Please note that A-Device must input the following command
    if you want the board to act as a host again.
     # echo host > /sys/devices/platform/soc/ee020000.usb/role
    Signed-off-by: default avatarYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
    Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
    cc995c9e
renesas_usb3.c 54.5 KB