linux-6.8/kernel/cpu_pm.c

1 // SPDX-License-Identifier: GPL-2.0-only
29 static int cpu_pm_notify(enum cpu_pm_event event)  in cpu_pm_notify()
40 static int cpu_pm_notify_robust(enum cpu_pm_event event_up, enum cpu_pm_event event_down)  in cpu_pm_notify_robust()
42 	unsigned long flags;  in cpu_pm_notify_robust()  local
45 	raw_spin_lock_irqsave(&cpu_pm_notifier.lock, flags);  in cpu_pm_notify_robust()
47 	raw_spin_unlock_irqrestore(&cpu_pm_notifier.lock, flags);  in cpu_pm_notify_robust()
53  * cpu_pm_register_notifier - register a driver with cpu_pm
59  * This function has the same return conditions as raw_notifier_chain_register.
63 	unsigned long flags;  in cpu_pm_register_notifier()  local
66 	raw_spin_lock_irqsave(&cpu_pm_notifier.lock, flags);  in cpu_pm_register_notifier()
68 	raw_spin_unlock_irqrestore(&cpu_pm_notifier.lock, flags);  in cpu_pm_register_notifier()
74  * cpu_pm_unregister_notifier - unregister a driver with cpu_pm
79  * This function has the same return conditions as raw_notifier_chain_unregister.
83 	unsigned long flags;  in cpu_pm_unregister_notifier()  local
86 	raw_spin_lock_irqsave(&cpu_pm_notifier.lock, flags);  in cpu_pm_unregister_notifier()
88 	raw_spin_unlock_irqrestore(&cpu_pm_notifier.lock, flags);  in cpu_pm_unregister_notifier()
94  * cpu_pm_enter - CPU low power entry notifier
97  * cause some blocks in the same power domain as the cpu to reset.
102  * co-processor, interrupt controller and its PM extensions, local CPU
106  * Return conditions are same as __raw_notifier_call_chain.
115  * cpu_pm_exit - CPU low power exit notifier
118  * have caused some blocks in the same power domain as the cpu to reset.
120  * Notified drivers can include VFP co-processor, interrupt controller
124  * Return conditions are same as __raw_notifier_call_chain.
133  * cpu_cluster_pm_enter - CPU cluster low power entry notifier
140  * domain. Notified drivers can include VFP co-processor, interrupt controller
146  * Return conditions are same as __raw_notifier_call_chain.
155  * cpu_cluster_pm_exit - CPU cluster low power exit notifier
163  * domain. Notified drivers can include VFP co-processor, interrupt controller
167  * Return conditions are same as __raw_notifier_call_chain.