config USB_ARCH_HAS_HCD def_bool y config USB bool "Support for Host-side USB" depends on USB_ARCH_HAS_HCD ---help--- Universal Serial Bus (USB) is a specification for a serial bus subsystem which offers higher speeds and more features than the traditional PC serial port. The bus supplies power to peripherals and allows for hot swapping. Up to 127 USB peripherals can be connected to a single USB host in a tree structure. The USB host is the root of the tree, the peripherals are the leaves and the inner nodes are special USB devices called hubs. Most PCs now have USB host ports, used to connect peripherals such as scanners, keyboards, mice, modems, cameras, disks, flash memory, network links, and printers to the PC. Say Y here if your computer has a host-side USB port and you want to use USB devices. You then need to say Y to at least one of the Host Controller Driver (HCD) options below. Choose a USB 1.1 controller, such as "UHCI HCD support" or "OHCI HCD support", and "EHCI HCD (USB 2.0) support" except for older systems that do not have USB 2.0 support. It doesn't normally hurt to select them all if you are not certain. If your system has a device-side USB port, used in the peripheral side of the USB protocol, see the "USB Gadget" framework instead. After choosing your HCD, then select drivers for the USB peripherals you'll be using. You may want to check out the information provided in and especially the links given in . if USB source "drivers/usb/host/Kconfig" config USB_STORAGE bool "USB Mass Storage support" ---help--- Say Y here if you want to connect USB mass storage devices to your board's USB port. endif