path: root/Documentation/rtc.txt
diff options
authorMike Frysinger <vapier.adi@gmail.com>2008-02-06 09:38:56 (GMT)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-06 18:41:14 (GMT)
commit8a0ba4e0178f4d87445b5527bfefdd5437b974c6 (patch)
tree53454aa1f7ced9da40864b22c6488be5ef1ea9f3 /Documentation/rtc.txt
parentfcd8db002f784706e9aa190d0b6350f868e61c32 (diff)
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>
Diffstat (limited to 'Documentation/rtc.txt')
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/rtc.txt b/Documentation/rtc.txt
index e20b19c..804a7cf 100644
--- a/Documentation/rtc.txt
+++ b/Documentation/rtc.txt
@@ -182,8 +182,8 @@ driver returns ENOIOCTLCMD. Some common examples:
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
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
- the frequency, just return -ENOTTY.
+ 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.
If all else fails, check out the rtc-test.c driver!