diff --git a/include/asm-mips/m48t37.h b/include/asm-mips/m48t37.h
new file mode 100644
index 0000000..cabf862
--- /dev/null
+++ b/include/asm-mips/m48t37.h
@@ -0,0 +1,35 @@
+/*
+ *  Registers for the SGS-Thomson M48T37 Timekeeper RAM chip
+ */
+#ifndef _ASM_M48T37_H
+#define _ASM_M48T37_H
+
+#include <linux/spinlock.h>
+
+extern spinlock_t rtc_lock;
+
+struct m48t37_rtc {
+	volatile u8	pad[0x7ff0];    /* NVRAM */
+	volatile u8	flags;
+	volatile u8	century;
+	volatile u8	alarm_sec;
+	volatile u8	alarm_min;
+	volatile u8	alarm_hour;
+	volatile u8	alarm_data;
+	volatile u8	interrupts;
+	volatile u8	watchdog;
+	volatile u8	control;
+	volatile u8	sec;
+	volatile u8	min;
+	volatile u8	hour;
+	volatile u8	day;
+	volatile u8	date;
+	volatile u8	month;
+	volatile u8	year;
+};
+
+#define M48T37_RTC_SET		0x80
+#define M48T37_RTC_STOPPED	0x80
+#define M48T37_RTC_READ		0x40
+
+#endif /* _ASM_M48T37_H */