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 000000000000..da237754ded9
--- /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);