Drop the broken literalinclude::
pointing at a non-existent source path, replace the vague "mode values
should be one of ..." descriptions with a proper reference keyed to the
UG, and lay out each directive's accepted values, the matrix-mode
ix/iy/qx/qy -> Ga/Gb/Gc/Gd mapping, the scalar_gain encoding
(code = 64 * scalarGain - 1), the Rx-only ADC averaging semantics,
the 2-GPIO config-0/config-1 split behind direct_gpio vs. direct_gpio1,
and the per-mode coefficient-count table.
Also note that dest: is mandatory (driver now errors out without it)
and add a pointer to the iio-oscilloscope filters/ad9084 example
pfilt_*.txt blobs.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
d5c101e8a6