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