1 files changed, 39 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-dec/mc146818rtc.h b/arch/mips/include/asm/mach-dec/mc146818rtc.h
new file mode 100644
index 000000000..d4614e2a8
--- /dev/null
+++ b/arch/mips/include/asm/mach-dec/mc146818rtc.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * RTC definitions for DECstation style attached Dallas DS1287 chip.
+ *
+ * Copyright (C) 1998, 2001 by Ralf Baechle
+ * Copyright (C) 1998 by Harald Koerfgen
+ * Copyright (C) 2002, 2005  Maciej W. Rozycki
+ */
+#ifndef __ASM_MIPS_DEC_RTC_DEC_H
+#define __ASM_MIPS_DEC_RTC_DEC_H
+
+#include <linux/types.h>
+#include <asm/addrspace.h>
+#include <asm/dec/system.h>
+
+extern volatile u8 *dec_rtc_base;
+
+#define ARCH_RTC_LOCATION
+
+#define RTC_PORT(x)	CPHYSADDR((long)dec_rtc_base)
+#define RTC_IO_EXTENT	dec_kn_slot_size
+#define RTC_IOMAPPED	0
+#undef RTC_IRQ
+
+#define RTC_DEC_YEAR	0x3f	/* Where we store the real year on DECs.  */
+
+static inline unsigned char CMOS_READ(unsigned long addr)
+{
+	return dec_rtc_base[addr * 4];
+}
+
+static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
+{
+	dec_rtc_base[addr * 4] = data;
+}
+
+#define RTC_ALWAYS_BCD	0
+
+#endif /* __ASM_MIPS_DEC_RTC_DEC_H */