40 lines
911 B
C
40 lines
911 B
C
|
/*
|
||
|
|
* poweroff.c - ACPI handler for powering off the system.
|
||
|
|
*
|
||
|
|
* AKA S5, but it is independent of whether or not the kernel supports
|
||
|
|
* any other sleep support in the system.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/pm.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <acpi/acpi_bus.h>
|
||
|
|
#include <linux/sched.h>
|
||
|
|
#include "sleep.h"
|
||
|
|
|
||
|
|
static void
|
||
|
|
acpi_power_off (void)
|
||
|
|
{
|
||
|
|
printk("%s called\n",__FUNCTION__);
|
||
|
|
/* Some SMP machines only can poweroff in boot CPU */
|
||
|
|
set_cpus_allowed(current, cpumask_of_cpu(0));
|
||
|
|
acpi_wakeup_gpe_poweroff_prepare();
|
||
|
|
acpi_enter_sleep_state_prep(ACPI_STATE_S5);
|
||
|
|
ACPI_DISABLE_IRQS();
|
||
|
|
acpi_enter_sleep_state(ACPI_STATE_S5);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int acpi_poweroff_init(void)
|
||
|
|
{
|
||
|
|
if (!acpi_disabled) {
|
||
|
|
u8 type_a, type_b;
|
||
|
|
acpi_status status;
|
||
|
|
|
||
|
|
status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b);
|
||
|
|
if (ACPI_SUCCESS(status))
|
||
|
|
pm_power_off = acpi_power_off;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
late_initcall(acpi_poweroff_init);
|