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path: root/drivers/acpi/sleep/poweroff.c
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-rw-r--r--drivers/acpi/sleep/poweroff.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/acpi/sleep/poweroff.c b/drivers/acpi/sleep/poweroff.c
new file mode 100644
index 0000000..da23775
--- /dev/null
+++ b/drivers/acpi/sleep/poweroff.c
@@ -0,0 +1,39 @@
+/*
+ * 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);
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