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![Paul Burton](/assets/img/avatar_default.png)
This patch adds a cpuidle driver for systems based around the MIPS Coherent Processing System (CPS) architecture. It supports four idle states: - The standard MIPS wait instruction. - The non-coherent wait, clock gated & power gated states exposed by the recently added pm-cps layer. The pm-cps layer is used to enter all the deep idle states. Since cores in the clock or power gated states cannot service interrupts, the gic_send_ipi_single function is modified to send a power up command for the appropriate core to the CPC in cases where the target CPU has marked itself potentially incoherent. Signed-off-by: Paul Burton <paul.burton@imgtec.com>
52 lines
1.3 KiB
Text
52 lines
1.3 KiB
Text
menu "CPU Idle"
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config CPU_IDLE
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bool "CPU idle PM support"
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default y if ACPI || PPC_PSERIES
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select CPU_IDLE_GOV_LADDER if (!NO_HZ && !NO_HZ_IDLE)
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select CPU_IDLE_GOV_MENU if (NO_HZ || NO_HZ_IDLE)
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help
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CPU idle is a generic framework for supporting software-controlled
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idle processor power management. It includes modular cross-platform
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governors that can be swapped during runtime.
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If you're using an ACPI-enabled platform, you should say Y here.
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if CPU_IDLE
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config CPU_IDLE_MULTIPLE_DRIVERS
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bool "Support multiple cpuidle drivers"
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default n
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help
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Allows the cpuidle framework to use different drivers for each CPU.
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This is useful if you have a system with different CPU latencies and
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states. If unsure say N.
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config CPU_IDLE_GOV_LADDER
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bool "Ladder governor (for periodic timer tick)"
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default y
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config CPU_IDLE_GOV_MENU
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bool "Menu governor (for tickless system)"
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default y
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menu "ARM CPU Idle Drivers"
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depends on ARM
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source "drivers/cpuidle/Kconfig.arm"
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endmenu
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menu "MIPS CPU Idle Drivers"
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depends on MIPS
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source "drivers/cpuidle/Kconfig.mips"
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endmenu
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menu "POWERPC CPU Idle Drivers"
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depends on PPC
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source "drivers/cpuidle/Kconfig.powerpc"
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endmenu
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endif
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config ARCH_NEEDS_CPU_IDLE_COUPLED
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def_bool n
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endmenu
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