PROC_DEVICETREE

Support for device tree in /proc

This option adds a device-tree directory under /proc which contains
an image of the device tree that the kernel copies from Open
Firmware or other boot firmware. If unsure, say Y here.

OF_GPIO

OpenFirmware GPIO accessors

OF_I2C

OpenFirmware I2C accessors

OF_SPI

OpenFirmware SPI accessors

OF_MDIO

OpenFirmware MDIO bus (Ethernet PHY) accessors

OF_PCI

OpenFirmware PCI bus accessors