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rtc: update documentation wrt irq_set_freq 

Document the proper use of the irq_set_freq function.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Frysinger 2008-02-06 01:38:56 -08:00 committed by Linus Torvalds
parent fcd8db002f
commit 8a0ba4e017
1 changed files with 2 additions and 2 deletions
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4
Documentation/rtc.txt
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@ -182,8 +182,8 @@ driver returns ENOIOCTLCMD. Some common examples:
since the frequency is stored in the irq_freq member of the rtc_device since the frequency is stored in the irq_freq member of the rtc_device
structure. Your driver needs to initialize the irq_freq member during structure. Your driver needs to initialize the irq_freq member during
init. Make sure you check the requested frequency is in range of your init. Make sure you check the requested frequency is in range of your
hardware in the irq_set_freq function. If you cannot actually change hardware in the irq_set_freq function. If it isn't, return -EINVAL. If
the frequency, just return -ENOTTY. you cannot actually change the frequency, do not define irq_set_freq.
If all else fails, check out the rtc-test.c driver! If all else fails, check out the rtc-test.c driver!