menuconfig POWER_AVS bool "Adaptive Voltage Scaling class support" help AVS is a power management technique which finely controls the operating voltage of a device in order to optimize (i.e. reduce) its power consumption. At a given operating point the voltage is adapted depending on static factors (chip manufacturing process) and dynamic factors (temperature depending performance). AVS is also called SmartReflex on OMAP devices. Say Y here to enable Adaptive Voltage Scaling class support. config ROCKCHIP_IODOMAIN tristate "Rockchip IO domain support" depends on POWER_AVS && ARCH_ROCKCHIP && OF help Say y here to enable support io domains on Rockchip SoCs. It is necessary for the io domain setting of the SoC to match the voltage supplied by the regulators.