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rtc: update documentation wrt RTC_PIE/irq_set_state 

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Mike Frysinger 2009-09-22 16:46:24 -07:00 committed by Linus Torvalds
parent aa958f571e
commit ad91fd854f
1 changed files with 2 additions and 0 deletions
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Documentation/rtc.txt
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@ -185,6 +185,8 @@ driver returns ENOIOCTLCMD. Some common examples:
hardware in the irq_set_freq function. If it isn't, return -EINVAL. If
you cannot actually change the frequency, do not define irq_set_freq.
* RTC_PIE_ON, RTC_PIE_OFF: the irq_set_state function will be called.
If all else fails, check out the rtc-test.c driver!