1 files changed, 24 insertions, 0 deletions

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 412a1e04a922..17516ad59937 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -77,6 +77,9 @@ EXPORT_SYMBOL(acpi_in_debugger);
 extern char line_buf[80];
 #endif                          /*ENABLE_DEBUGGER */
 
+static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
+                                      u32 pm1b_ctrl);
+
 static acpi_osd_handler acpi_irq_handler;
 static void *acpi_irq_context;
 static struct workqueue_struct *kacpid_wq;
@@ -1641,3 +1644,24 @@ acpi_status acpi_os_terminate(void)
 
         return AE_OK;
 }
+
+acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
+                                  u32 pm1b_control)
+{
+        int rc = 0;
+        if (__acpi_os_prepare_sleep)
+                rc = __acpi_os_prepare_sleep(sleep_state,
+                                             pm1a_control, pm1b_control);
+        if (rc < 0)
+                return AE_ERROR;
+        else if (rc > 0)
+                return AE_CTRL_SKIP;
+
+        return AE_OK;
+}
+
+void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
+                               u32 pm1a_ctrl, u32 pm1b_ctrl))
+{
+        __acpi_os_prepare_sleep = func;
+}