menuconfig CPU_IDLE bool "CPU idle PM support" default y if ACPI || PPC_PSERIES select CPU_IDLE_GOV_LADDER if (!NO_HZ && !NO_HZ_IDLE) select CPU_IDLE_GOV_MENU if (NO_HZ || NO_HZ_IDLE) help CPU idle is a generic framework for supporting software-controlled idle processor power management. It includes modular cross-platform governors that can be swapped during runtime. If you're using an ACPI-enabled platform, you should say Y here. if CPU_IDLE config CPU_IDLE_MULTIPLE_DRIVERS bool "Support multiple cpuidle drivers" default n help Allows the cpuidle framework to use different drivers for each CPU. This is useful if you have a system with different CPU latencies and states. If unsure say N. config CPU_IDLE_GOV_LADDER bool "Ladder governor (for periodic timer tick)" default y config CPU_IDLE_GOV_MENU bool "Menu governor (for tickless system)" default y config CPU_IDLE_CALXEDA bool "CPU Idle Driver for Calxeda processors" depends on ARCH_HIGHBANK select ARM_CPU_SUSPEND help Select this to enable cpuidle on Calxeda processors. config CPU_IDLE_ZYNQ bool "CPU Idle Driver for Xilinx Zynq processors" depends on ARCH_ZYNQ help Select this to enable cpuidle on Xilinx Zynq processors. endif config ARCH_NEEDS_CPU_IDLE_COUPLED def_bool n