Add definitions for the Dallas DS1742 RTC / non-volatile memory.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/include/linux/ds1742rtc.h b/include/linux/ds1742rtc.h
new file mode 100644 (file)
index 0000000..a83cdd1
--- /dev/null
+++ b/include/linux/ds1742rtc.h
@@ -0,0 +1,53 @@
+/*
+ * ds1742rtc.h - register definitions for the Real-Time-Clock / CMOS RAM
+ *
+ * Copyright (C) 1999-2001 Toshiba Corporation
+ * Copyright (C) 2003 Ralf Baechle (ralf@linux-mips.org)
+ *
+ * Permission is hereby granted to copy, modify and redistribute this code
+ * in terms of the GNU Library General Public License, Version 2 or later,
+ * at your option.
+ */
+#ifndef __LINUX_DS1742RTC_H
+#define __LINUX_DS1742RTC_H
+
+#include <asm/ds1742.h>
+
+#define RTC_BRAM_SIZE          0x800
+#define RTC_OFFSET             0x7f8
+
+/*
+ * Register summary
+ */
+#define RTC_CONTROL            (RTC_OFFSET + 0)
+#define RTC_CENTURY            (RTC_OFFSET + 0)
+#define RTC_SECONDS            (RTC_OFFSET + 1)
+#define RTC_MINUTES            (RTC_OFFSET + 2)
+#define RTC_HOURS              (RTC_OFFSET + 3)
+#define RTC_DAY                        (RTC_OFFSET + 4)
+#define RTC_DATE               (RTC_OFFSET + 5)
+#define RTC_MONTH              (RTC_OFFSET + 6)
+#define RTC_YEAR               (RTC_OFFSET + 7)
+
+#define RTC_CENTURY_MASK       0x3f
+#define RTC_SECONDS_MASK       0x7f
+#define RTC_DAY_MASK           0x07
+
+/*
+ * Bits in the Control/Century register
+ */
+#define RTC_WRITE              0x80
+#define RTC_READ               0x40
+
+/*
+ * Bits in the Seconds register
+ */
+#define RTC_STOP               0x80
+
+/*
+ * Bits in the Day register
+ */
+#define RTC_BATT_FLAG          0x80
+#define RTC_FREQ_TEST          0x40
+
+#endif /* __LINUX_DS1742RTC_H */