| |
| |
| 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. |
| |
| If all the idle states are the same, the wrapper function cpuidle_register |
| could be used instead. |
| |
| 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(struct cpuidle_driver *drv, |
| const struct cpumask *const coupled_cpus); |
| extern int cpuidle_unregister(struct cpuidle_driver *drv); |
| 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); |
