diff --git a/include/linux/wl12xx.h b/include/linux/wl12xx.h
index 4f902e1..bebb8ef 100644
--- a/include/linux/wl12xx.h
+++ b/include/linux/wl12xx.h
@@ -24,6 +24,14 @@
 #ifndef _LINUX_WL12XX_H
 #define _LINUX_WL12XX_H
 
+/* The board reference clock values */
+enum {
+	WL12XX_REFCLOCK_19 = 0,	/* 19.2 MHz */
+	WL12XX_REFCLOCK_26 = 1,	/* 26 MHz */
+	WL12XX_REFCLOCK_38 = 2,	/* 38.4 MHz */
+	WL12XX_REFCLOCK_54 = 3,	/* 54 MHz */
+};
+
 struct wl12xx_platform_data {
 	void (*set_power)(bool enable);
 	/* SDIO only: IRQ number if WLAN_IRQ line is used, 0 for SDIO IRQs */