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[PATCH] char/rtc: Handle memory-mapped chips properly

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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>
This commit is contained in:
Maciej W. Rozycki 2006-07-10 04:45:30 -07:00 • committed by Linus Torvalds
parent 06c67befee
commit 38e0e8c055
3 changed files with 41 additions and 9 deletions
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7
include/linux/mc146818rtc.h
View file

@ -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 */