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--- a/Documentation/ABI/testing/sysfs-bus-iio-frequency-ad9523
+++ b/Documentation/ABI/testing/sysfs-bus-iio-frequency-ad9523
@@ -8,7 +8,9 @@ KernelVersion: 3.4.0
Contact: linux-iio@vger.kernel.org
Description:
Reading returns either '1' or '0'.
+
'1' means that the clock in question is present.
+
'0' means that the clock is missing.
What: /sys/bus/iio/devices/iio:deviceX/pllY_locked