Hi, On Tue, Jan 15, 2013 at 04:18:00PM +0100, stl wrote: > Hello all, > I need some clarifications concerning the terms used in the linux usb > documentation > for usb driver: > > Firstly, what is the difference between: > - device driver > - chipset driver > - interface driver > - gadget driver > ? device driver != gadget driver. gadget driver is the peripheral side implementation (or emulation) of a USB class like NCM, MSC, UASP, etc. device driver is the piece of SW that talks directly to the underlying controller and reads/writes from/to its registers to make I/O happen. > If I well understood, device driver is the same that gadget driver. > > Secondly, I am writing a "device-side" usb driver for uClinux for our > own specific > USB controller. > > Should I use usb_register() or platform_driver_register() to register > the driver during > boot? you need a platform_driver > What is the difference between these two functions? a usb_driver (the structure) represents a real USB device connected to a real USB Host (uhci, ohci, ehci, xhci, etc) port, like a memory card reader, a webcam, etc. platform_driver (the structure) represents an IP inside a SoC. -- balbi
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