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-rw-r--r--Documentation/rtc.txt2
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/rtc.txt b/Documentation/rtc.txt
index 8deffcd68cb8..102ce9625e65 100644
--- a/Documentation/rtc.txt
+++ b/Documentation/rtc.txt
@@ -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!