Merge tag 'arm64-perf' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

[cascardo/linux.git] / Documentation / rtc.txt

diff --git a/Documentation/rtc.txt b/Documentation/rtc.txt
index 8446f1e..ddc3660 100644 (file)
--- a/Documentation/rtc.txt
+++ b/Documentation/rtc.txt
@@ -157,6 +157,12 @@ wakealarm:  The time at which the clock will generate a system wakeup
                 the epoch by default, or if there's a leading +, seconds in the
                 future, or if there is a leading +=, seconds ahead of the current
                 alarm.
+offset:                 The amount which the rtc clock has been adjusted in firmware.
+                Visible only if the driver supports clock offset adjustment.
+                The unit is parts per billion, i.e. The number of clock ticks
+                which are added to or removed from the rtc's base clock per
+                billion ticks. A positive value makes a day pass more slowly,
+                longer, and a negative value makes a day pass more quickly.
 
 IOCTL INTERFACE
 ---------------