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Diffstat (limited to 'include/linux/mc146818rtc.h')
-rw-r--r--include/linux/mc146818rtc.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/mc146818rtc.h b/include/linux/mc146818rtc.h
index bbc93ae217e1..432b2fa24929 100644
--- a/include/linux/mc146818rtc.h
+++ b/include/linux/mc146818rtc.h
@@ -89,4 +89,11 @@ extern spinlock_t rtc_lock; /* serialize CMOS RAM access */
# define RTC_VRT 0x80 /* valid RAM and time */
/**********************************************************************/
+#ifndef ARCH_RTC_LOCATION /* Override by <asm/mc146818rtc.h>? */
+
+#define RTC_IO_EXTENT 0x8
+#define RTC_IOMAPPED 1 /* Default to I/O mapping. */
+
+#endif /* ARCH_RTC_LOCATION */
+
#endif /* _MC146818RTC_H */