+#if defined(CONFIG_MX25) || defined(CONFIG_MX53)
+/* defines for MIIGSK */
+/* RMII frequency control: 0=50MHz, 1=5MHz */
+#define MIIGSK_CFGR_FRCONT (1 << 6)
+/* loopback mode */
+#define MIIGSK_CFGR_LBMODE (1 << 4)
+/* echo mode */
+#define MIIGSK_CFGR_EMODE (1 << 3)
+/* MII gasket mode field */
+#define MIIGSK_CFGR_IF_MODE_MASK (3 << 0)
+/* MMI/7-Wire mode */
+#define MIIGSK_CFGR_IF_MODE_MII (0 << 0)
+/* RMII mode */
+#define MIIGSK_CFGR_IF_MODE_RMII (1 << 0)
+/* reflects MIIGSK Enable bit (RO) */
+#define MIIGSK_ENR_READY (1 << 2)
+/* enable MIGSK (set by default) */
+#define MIIGSK_ENR_EN (1 << 1)
+#endif
+