+#ifdef CONFIG_ARCH_IMX
+#define UCR3_REF25 (1<<3) /* Ref freq 25 MHz, only on mx1 */
+#define UCR3_REF30 (1<<2) /* Ref Freq 30 MHz, only on mx1 */
+#endif
+#if defined CONFIG_ARCH_MX2 || defined CONFIG_ARCH_MX3
+#define UCR3_RXDMUXSEL (1<<2) /* RXD Muxed Input Select, on mx2/mx3 */
+#endif