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);