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3		Supporting multiple CPU idle levels in kernel
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5				cpuidle drivers
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10cpuidle driver hooks into the cpuidle infrastructure and handles the
11architecture/platform dependent part of CPU idle states. Driver
12provides the platform idle state detection capability and also
13has mechanisms in place to support actual entry-exit into CPU idle states.
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15cpuidle driver initializes the cpuidle_device structure for each CPU device
16and registers with cpuidle using cpuidle_register_device.
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18If all the idle states are the same, the wrapper function cpuidle_register
19could be used instead.
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21It can also support the dynamic changes (like battery <-> AC), by using
22cpuidle_pause_and_lock, cpuidle_disable_device and cpuidle_enable_device,
23cpuidle_resume_and_unlock.
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25Interfaces:
26extern int cpuidle_register(struct cpuidle_driver *drv,
27                            const struct cpumask *const coupled_cpus);
28extern int cpuidle_unregister(struct cpuidle_driver *drv);
29extern int cpuidle_register_driver(struct cpuidle_driver *drv);
30extern void cpuidle_unregister_driver(struct cpuidle_driver *drv);
31extern int cpuidle_register_device(struct cpuidle_device *dev);
32extern void cpuidle_unregister_device(struct cpuidle_device *dev);
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34extern void cpuidle_pause_and_lock(void);
35extern void cpuidle_resume_and_unlock(void);
36extern int cpuidle_enable_device(struct cpuidle_device *dev);
37extern void cpuidle_disable_device(struct cpuidle_device *dev);
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