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> --- Changelog v4: - Change to "in_voltageY_dither_enable" - Change scale to numbers + 100% for no scaling - Possible dither source values: 0 - N0, 1 - N1 .../ABI/testing/sysfs-bus-iio-dac-ad5766 | 36 +++++++++++++++++++ 1 file changed, 36 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..72100edb88bb --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-dac-ad5766 @@ -0,0 +1,36 @@ +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_dither_pwr +KernelVersion: +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Dither enable. Write 1 to enable dither or 0 to disable it. + +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 is not + inverted by default. Write "1" to invert dither. + +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: + "100 75 50 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: + 100 - No scaling + 75 - 75% scaling + 50 - 50% scaling + 25 - 25% scaling + +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. Write "0" to + select N0 source, write "1" to select N1 source. -- 2.17.1
