New interface is proposed for dither functionality. This future allows composing an external signals to the selected output channel. The dither signal can be turned on/off, scaled, inverted, or it can be selected from different sources. Signed-off-by: Cristian Pop <cristian.pop@xxxxxxxxxx> --- .../ABI/testing/sysfs-bus-iio-dac-ad5766 | 45 +++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-dac-ad5766 diff --git a/Documentation/ABI/testing/sysfs-bus-iio-dac-ad5766 b/Documentation/ABI/testing/sysfs-bus-iio-dac-ad5766 new file mode 100644 index 000000000000..361bbd0862df --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-dac-ad5766 @@ -0,0 +1,45 @@ +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_dither_pwr +KernelVersion: +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Dither power on/off. Write 0 to power on dither or 1 to power it off. + +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_dither_invert +KernelVersion: +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Inverts the dither applied to the selected DAC channel. Dither signal is + not inverted (default) Dither signal is inverted. + +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_dither_scale_available +KernelVersion: +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Returns possible scalings available for the current channel: + "NO_SCALING 75%_SCALING 50%_SCALING 25%_SCALING" + +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_dither_scale +KernelVersion: +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Scales the dither before it is applied to the selected channel. + NO_SCALING - No scaling + 75%_SCALING - 75% scaling + 50%_SCALING - 50% scaling + 25%_SCALING - 25% scaling + +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_dither_source_available +KernelVersion: +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Returns possible dither sources available for the selected channel: + "NO_DITHER N0 N1" + +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_dither_source +KernelVersion: +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Selects dither source applied to the selected channel. + NO_DITHER - No dither applied + N0 - N0 dither signal applied + N1 - N1 dither signal applied -- 2.17.1
