Add initial ABI documentation for admv8818 filter sysfs interfaces. Signed-off-by: Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx> --- changes in v2: - remove bandwidth/center frequency related custom device attributes - remove bypass filter mode .../ABI/testing/sysfs-bus-iio-filter-admv8818 | 44 +++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-filter-admv8818 diff --git a/Documentation/ABI/testing/sysfs-bus-iio-filter-admv8818 b/Documentation/ABI/testing/sysfs-bus-iio-filter-admv8818 new file mode 100644 index 000000000000..7211b5d0daa0 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-filter-admv8818 @@ -0,0 +1,44 @@ +What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_filter_high_pass_3db_frequency +KernelVersion: +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + The cut-off frequency of the ADMV8818 high pass filter. The value is scaled using + the `out_altvoltageY_scale` attribute so that GHz frequencies are valid inputs, + The accepted range of values for the frequencies is between 1.75GHz and 19.9GHz. + + The default value for the scale is 1000000, therefore MHz frequency values are + passed as input. + +What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_filter_low_pass_3db_frequency +KernelVersion: +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + The cut-off frequency of the ADMV8818 low pass filter. The value is scaled using + the `out_altvoltageY_scale` attribute so that GHz frequencies are valid inputs, + The accepted range of values for the frequencies is between 2.05GHz and 18.85GHz. + + The default value for the scale is 1000000, therefore MHz frequency values are + passed as input. + +What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_scale +KernelVersion: +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Scale high pass and lowpass filter frequency values to Hz. + +What: /sys/bus/iio/devices/iio:deviceX/filter_mode_available +KernelVersion: +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Reading this returns the valid values that can be written to the + on_altvoltage0_mode attribute: + + - auto -> Adjust bandpass filter to track changes in input clock rate. + - manual -> disable/unregister the clock rate notifier / input clock tracking. + +What: /sys/bus/iio/devices/iio:deviceX/filter_mode +KernelVersion: +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + This attribute configures the filter mode. + Reading returns the actual mode. -- 2.34.0
