Based on kernel version 4.16.1. Page generated on 2018-04-09 11:52 EST.
1 2 3 Supporting multiple CPU idle levels in kernel 4 5 cpuidle drivers 6 7 8 9 10 cpuidle driver hooks into the cpuidle infrastructure and handles the 11 architecture/platform dependent part of CPU idle states. Driver 12 provides the platform idle state detection capability and also 13 has mechanisms in place to support actual entry-exit into CPU idle states. 14 15 cpuidle driver initializes the cpuidle_device structure for each CPU device 16 and registers with cpuidle using cpuidle_register_device. 17 18 If all the idle states are the same, the wrapper function cpuidle_register 19 could be used instead. 20 21 It can also support the dynamic changes (like battery <-> AC), by using 22 cpuidle_pause_and_lock, cpuidle_disable_device and cpuidle_enable_device, 23 cpuidle_resume_and_unlock. 24 25 Interfaces: 26 extern int cpuidle_register(struct cpuidle_driver *drv, 27 const struct cpumask *const coupled_cpus); 28 extern int cpuidle_unregister(struct cpuidle_driver *drv); 29 extern int cpuidle_register_driver(struct cpuidle_driver *drv); 30 extern void cpuidle_unregister_driver(struct cpuidle_driver *drv); 31 extern int cpuidle_register_device(struct cpuidle_device *dev); 32 extern void cpuidle_unregister_device(struct cpuidle_device *dev); 33 34 extern void cpuidle_pause_and_lock(void); 35 extern void cpuidle_resume_and_unlock(void); 36 extern int cpuidle_enable_device(struct cpuidle_device *dev); 37 extern void cpuidle_disable_device(struct cpuidle_device *dev);