Documentation: ABI: testing: add support for ADF41513

Add ABI documentation for ADF41513 PLL sysfs interfaces

Signed-off-by: Rodrigo Alencar <[email protected]>

Author: rodrigo455

Documentation/ABI/testing/sysfs-bus-iio-frequency-adf41513

@@ -0,0 +1,28 @@
+What:		/sys/bus/iio/devices/iio:deviceX/out_altvoltageY_frequency_resolution
+KernelVersion:	6.19
+Contact:	[email protected]
+Description:
+		Stores channel Y frequency resolution/channel spacing in Hz.
+		The value given directly influences the choice of operation:
+
+		- integer-N: requested frequency is a multiple of the Phase Detector
+		frequency.
+		- fixed modulus: fractional-N mode with fixed modulus.
+		- variable modulus: dual-modulus fractional-N mode with extra variable
+		modulus added on top of the fixed one.
+
+		It is assumed that the algorithm that is used to compute the various
+		dividers, is able to generate proper values for multiples of channel
+		spacing.
+
+What:		/sys/bus/iio/devices/iio:deviceX/out_altvoltageY_refin_frequency
+KernelVersion:	6.19
+Contact:	[email protected]
+Description:
+		Sets channel Y REFin frequency in Hz. In some clock chained
+		applications, the reference frequency used by the PLL may change during
+		runtime. This attribute allows the user to adjust the reference
+		frequency accordingly.
+		The value written has no effect until out_altvoltageY_frequency
+		is updated. Consider to use out_altvoltageY_powerdown to power down the
+		PLL and its RFOut buffers during REFin changes.

MAINTAINERS

@@ -1606,6 +1606,7 @@ M:	Rodrigo Alencar <[email protected]>
 L:	[email protected]
 S:	Supported
 W:	https://ez.analog.com/linux-software-drivers
+F:	Documentation/ABI/testing/sysfs-bus-iio-frequency-adf41513
 F:	Documentation/devicetree/bindings/iio/frequency/adi,adf41513.yaml
 F:	Documentation/iio/adf41513.rst
 F:	drivers/iio/frequency/adf41513.c