diff --git a/arch/arm/include/asm/firmware.h b/arch/arm/include/asm/firmware.h
index 15631300c238..2c9f10df7568 100644
--- a/arch/arm/include/asm/firmware.h
+++ b/arch/arm/include/asm/firmware.h
@@ -21,6 +21,10 @@
  * A filled up structure can be registered with register_firmware_ops().
  */
 struct firmware_ops {
+	/*
+	 * Inform the firmware we intend to enter CPU idle mode
+	 */
+	int (*prepare_idle)(void);
 	/*
 	 * Enters CPU idle mode
 	 */