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+What: /sys/kernel/debug/iio/iio:deviceX/frequency_source
+KernelVersion: 7.3
+Contact: linux-iio@vger.kernel.org
+Description:
+ Read-only. Reports the channel label that is read from the
+ <dir>_<type>[Y]_label attribute, which corresponds to the on-chip
+ signal generator that is currently driving the output frequency.
+
+What: /sys/kernel/debug/iio/iio:deviceX/phase_source
+KernelVersion: 7.3
+Contact: linux-iio@vger.kernel.org
+Description:
+ Read-only. Reports the channel label that is read from the
+ <dir>_<type>[Y]_label attribute, which corresponds to the on-chip
+ signal generator that is currently driving the output phase.
+
+What: /sys/kernel/debug/iio/iio:deviceX/amplitude_source
+KernelVersion: 7.3
+Contact: linux-iio@vger.kernel.org
+Description:
+ Read-only. Reports the channel label that is read from the
+ <dir>_<type>[Y]_label attribute, which corresponds to the on-chip
+ signal generator that is currently driving the output amplitude.