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cpuidle: Add a poll_idle method

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Add a default poll idle state with 0 latency. Provides an option to users
to use poll_idle by using 0 as the latency requirement.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
venkatesh.pallipadi@intel.com
2008-01-31 17:35:06 -08:00
committed by Len Brown
parent 9b12e18cdc
commit 9a0b841586
4 changed files with 57 additions and 4 deletions
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include/linux/cpuidle.h
+10 -3
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@@ -46,9 +46,10 @@ struct cpuidle_state {
/* Idle State Flags */
#define CPUIDLE_FLAG_TIME_VALID (0x01) /* is residency time measurable? */
#define CPUIDLE_FLAG_CHECK_BM (0x02) /* BM activity will exit state */
#define CPUIDLE_FLAG_SHALLOW (0x10) /* low latency, minimal savings */
#define CPUIDLE_FLAG_BALANCED (0x20) /* medium latency, moderate savings */
#define CPUIDLE_FLAG_DEEP (0x40) /* high latency, large savings */
#define CPUIDLE_FLAG_POLL (0x10) /* no latency, no savings */
#define CPUIDLE_FLAG_SHALLOW (0x20) /* low latency, minimal savings */
#define CPUIDLE_FLAG_BALANCED (0x40) /* medium latency, moderate savings */
#define CPUIDLE_FLAG_DEEP (0x80) /* high latency, large savings */
#define CPUIDLE_DRIVER_FLAGS_MASK (0xFFFF0000)
@@ -178,4 +179,10 @@ static inline void cpuidle_unregister_governor(struct cpuidle_governor *gov) { }
#endif
#ifdef CONFIG_ARCH_HAS_CPU_RELAX
#define CPUIDLE_DRIVER_STATE_START 1
#else
#define CPUIDLE_DRIVER_STATE_START 0
#endif
#endif /* _LINUX_CPUIDLE_H */