diff options
Diffstat (limited to 'drivers/leds/trigger/ledtrig-heartbeat.c')
| -rw-r--r-- | drivers/leds/trigger/ledtrig-heartbeat.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/leds/trigger/ledtrig-heartbeat.c b/drivers/leds/trigger/ledtrig-heartbeat.c index 410c39c62dc7..c9f386213e9e 100644 --- a/drivers/leds/trigger/ledtrig-heartbeat.c +++ b/drivers/leds/trigger/ledtrig-heartbeat.c @@ -19,6 +19,7 @@ #include <linux/sched.h> #include <linux/leds.h> #include <linux/reboot.h> +#include <linux/suspend.h> #include "../leds.h" static int panic_heartbeats; @@ -154,6 +155,30 @@ static struct led_trigger heartbeat_led_trigger = { .deactivate = heartbeat_trig_deactivate, }; +static int heartbeat_pm_notifier(struct notifier_block *nb, + unsigned long pm_event, void *unused) +{ + int rc; + + switch (pm_event) { + case PM_SUSPEND_PREPARE: + case PM_HIBERNATION_PREPARE: + case PM_RESTORE_PREPARE: + led_trigger_unregister(&heartbeat_led_trigger); + break; + case PM_POST_SUSPEND: + case PM_POST_HIBERNATION: + case PM_POST_RESTORE: + rc = led_trigger_register(&heartbeat_led_trigger); + if (rc) + pr_err("could not re-register heartbeat trigger\n"); + break; + default: + break; + } + return NOTIFY_DONE; +} + static int heartbeat_reboot_notifier(struct notifier_block *nb, unsigned long code, void *unused) { @@ -168,6 +193,10 @@ static int heartbeat_panic_notifier(struct notifier_block *nb, return NOTIFY_DONE; } +static struct notifier_block heartbeat_pm_nb = { + .notifier_call = heartbeat_pm_notifier, +}; + static struct notifier_block heartbeat_reboot_nb = { .notifier_call = heartbeat_reboot_notifier, }; @@ -184,12 +213,14 @@ static int __init heartbeat_trig_init(void) atomic_notifier_chain_register(&panic_notifier_list, &heartbeat_panic_nb); register_reboot_notifier(&heartbeat_reboot_nb); + register_pm_notifier(&heartbeat_pm_nb); } return rc; } static void __exit heartbeat_trig_exit(void) { + unregister_pm_notifier(&heartbeat_pm_nb); unregister_reboot_notifier(&heartbeat_reboot_nb); atomic_notifier_chain_unregister(&panic_notifier_list, &heartbeat_panic_nb); |