2 * syscore.c - Execution of system core operations.
4 * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
6 * This file is released under the GPLv2.
9 #include <linux/syscore_ops.h>
10 #include <linux/mutex.h>
11 #include <linux/module.h>
12 #include <linux/interrupt.h>
14 static LIST_HEAD(syscore_ops_list
);
15 static DEFINE_MUTEX(syscore_ops_lock
);
18 * register_syscore_ops - Register a set of system core operations.
19 * @ops: System core operations to register.
21 void register_syscore_ops(struct syscore_ops
*ops
)
23 mutex_lock(&syscore_ops_lock
);
24 list_add_tail(&ops
->node
, &syscore_ops_list
);
25 mutex_unlock(&syscore_ops_lock
);
27 EXPORT_SYMBOL_GPL(register_syscore_ops
);
30 * unregister_syscore_ops - Unregister a set of system core operations.
31 * @ops: System core operations to unregister.
33 void unregister_syscore_ops(struct syscore_ops
*ops
)
35 mutex_lock(&syscore_ops_lock
);
37 mutex_unlock(&syscore_ops_lock
);
39 EXPORT_SYMBOL_GPL(unregister_syscore_ops
);
41 #ifdef CONFIG_PM_SLEEP
43 * syscore_suspend - Execute all the registered system core suspend callbacks.
45 * This function is executed with one CPU on-line and disabled interrupts.
47 int syscore_suspend(void)
49 struct syscore_ops
*ops
;
52 pr_debug("Checking wakeup interrupts\n");
54 /* Return error code if there are any wakeup interrupts pending. */
55 ret
= check_wakeup_irqs();
59 WARN_ONCE(!irqs_disabled(),
60 "Interrupts enabled before system core suspend.\n");
62 list_for_each_entry_reverse(ops
, &syscore_ops_list
, node
)
65 pr_info("PM: Calling %pF\n", ops
->suspend
);
69 WARN_ONCE(!irqs_disabled(),
70 "Interrupts enabled after %pF\n", ops
->suspend
);
76 pr_err("PM: System core suspend callback %pF failed.\n", ops
->suspend
);
78 list_for_each_entry_continue(ops
, &syscore_ops_list
, node
)
84 EXPORT_SYMBOL_GPL(syscore_suspend
);
87 * syscore_resume - Execute all the registered system core resume callbacks.
89 * This function is executed with one CPU on-line and disabled interrupts.
91 void syscore_resume(void)
93 struct syscore_ops
*ops
;
95 WARN_ONCE(!irqs_disabled(),
96 "Interrupts enabled before system core resume.\n");
98 list_for_each_entry(ops
, &syscore_ops_list
, node
)
101 pr_info("PM: Calling %pF\n", ops
->resume
);
103 WARN_ONCE(!irqs_disabled(),
104 "Interrupts enabled after %pF\n", ops
->resume
);
107 EXPORT_SYMBOL_GPL(syscore_resume
);
108 #endif /* CONFIG_PM_SLEEP */
111 * syscore_shutdown - Execute all the registered system core shutdown callbacks.
113 void syscore_shutdown(void)
115 struct syscore_ops
*ops
;
117 mutex_lock(&syscore_ops_lock
);
119 list_for_each_entry_reverse(ops
, &syscore_ops_list
, node
)
122 pr_info("PM: Calling %pF\n", ops
->shutdown
);
126 mutex_unlock(&syscore_ops_lock
);
This page took 0.03322 seconds and 6 git commands to generate.