Hi, On 08/08/2017 02:14 PM, Felipe Balbi wrote: > Hi, > > Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx> writes: >>> Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx> writes: >>>> The component u_serial provides a glue layer between TTY layer >>>> and a USB gadget device needed to provide a basic serial port >>>> functionality. Currently, u_serial sits under gadget/function >>>> and depends on CONFIG_USB_GADGET to be compiled and used. >>>> >>>> Most of the serial gadget devices are based on a UDC (USB device >>>> controller) and implemented by making use of the Linux gadget >>>> frameworks. But we are facing other implementions as well. One >>>> example can be found with xHCI debug capability. The xHCI debug >>>> capability implements a serial gadget with hardware and firmware, >>>> and provides an interface similar with xHCI host for submitting >>>> and reaping the transfer requests. >>>> >>>> In order to make better use of u_serial when implementing xHCI >>>> debug capability in xHCI driver, this patch moves u_serial.c >>>> from gadget/function to usb/common, and moves u_serial.h from >>>> gadget/function to include/linux/usb. >>>> >>>> Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx> >>> NAK, u_serial uses the gadget API. It's definitely not COMMON. >>> >> Okay. It seems that I can't use u_serial anyway. I will implement >> a new tty glue for my case. > have you looked at drivers/usb/serial/? > Yes, I've checked that. I think usb-serial framework is too complex for this case. XHCI debug capability is a simple gadget attached to xHCI host. Best regards, Lu Baolu -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
