diff options
| -rw-r--r-- | drivers/acpi/sleep.c | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 7a2e4d45b266..2b38c1bb0446 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -47,15 +47,32 @@ static void acpi_sleep_tts_switch(u32 acpi_state) } } -static int tts_notify_reboot(struct notifier_block *this, +static void acpi_sleep_pts_switch(u32 acpi_state) +{ + acpi_status status; + + status = acpi_execute_simple_method(NULL, "\\_PTS", acpi_state); + if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { + /* + * OS can't evaluate the _PTS object correctly. Some warning + * message will be printed. But it won't break anything. + */ + printk(KERN_NOTICE "Failure in evaluating _PTS object\n"); + } +} + +static int sleep_notify_reboot(struct notifier_block *this, unsigned long code, void *x) { acpi_sleep_tts_switch(ACPI_STATE_S5); + + acpi_sleep_pts_switch(ACPI_STATE_S5); + return NOTIFY_DONE; } -static struct notifier_block tts_notifier = { - .notifier_call = tts_notify_reboot, +static struct notifier_block sleep_notifier = { + .notifier_call = sleep_notify_reboot, .next = NULL, .priority = 0, }; @@ -899,9 +916,9 @@ int __init acpi_sleep_init(void) pr_info(PREFIX "(supports%s)\n", supported); /* - * Register the tts_notifier to reboot notifier list so that the _TTS - * object can also be evaluated when the system enters S5. + * Register the sleep_notifier to reboot notifier list so that the _TTS + * and _PTS object can also be evaluated when the system enters S5. */ - register_reboot_notifier(&tts_notifier); + register_reboot_notifier(&sleep_notifier); return 0; } |