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authorMaciej W. Rozycki <macro@linux-mips.org>2006-07-10 04:45:30 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-10 13:24:25 -0700
commit38e0e8c0550eaed1af48ec5ad9ddb8a25e8b04ae (patch)
treef38daa22e42969c8eabccfd73dc298dcaec99821 /include/linux
parent06c67befeeb16f2995c11b0e04a348103ddbfab1 (diff)
[PATCH] char/rtc: Handle memory-mapped chips properly
Handle memory-mapped chips properly, needed for example on DECstations. This support was in Linux 2.4 but for some reason got lost in 2.6. This patch is taken directly from the linux-mips repository. [akpm@osdl.org: cleanup] Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Martin Michlmayr <tbm@cyrius.com> Cc: Paul Gortmaker <penguin@muskoka.com> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux')
-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 bbc93ae217e..432b2fa2492 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 */