--- a/master/ioctl.h	Thu Jun 05 15:58:25 2008 +0000
+++ b/master/ioctl.h	Fri Jun 06 08:12:34 2008 +0000
@@ -54,6 +54,7 @@
 	EC_IOCTL_DOMAIN_FMMU,
 	EC_IOCTL_DATA,
     EC_IOCTL_SET_DEBUG,
+    EC_IOCTL_SLAVE_STATE,
 };
 
 /*****************************************************************************/
@@ -179,4 +180,12 @@
 
 /*****************************************************************************/
 
+typedef struct {
+    // inputs
+	uint16_t slave_position;
+    uint8_t requested_state;
+} ec_ioctl_slave_state_t;
+
+/*****************************************************************************/
+
 #endif