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Documentation/cpuidle/driver.txt
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Supporting multiple CPU idle levels in kernel cpuidle drivers cpuidle driver hooks into the cpuidle infrastructure and handles the architecture/platform dependent part of CPU idle states. Driver provides the platform idle state detection capability and also has mechanisms in place to support actual entry-exit into CPU idle states. cpuidle driver initializes the cpuidle_device structure for each CPU device and registers with cpuidle using cpuidle_register_device. It can also support the dynamic changes (like battery <-> AC), by using cpuidle_pause_and_lock, cpuidle_disable_device and cpuidle_enable_device, cpuidle_resume_and_unlock. Interfaces: extern int cpuidle_register_driver(struct cpuidle_driver *drv); extern void cpuidle_unregister_driver(struct cpuidle_driver *drv); extern int cpuidle_register_device(struct cpuidle_device *dev); extern void cpuidle_unregister_device(struct cpuidle_device *dev); extern void cpuidle_pause_and_lock(void); extern void cpuidle_resume_and_unlock(void); extern int cpuidle_enable_device(struct cpuidle_device *dev); extern void cpuidle_disable_device(struct cpuidle_device *dev); |