diff options
| author | Peter Rosin | 2016-11-08 12:58:56 +0100 |
|---|---|---|
| committer | Jonathan Cameron | 2016-11-13 13:07:15 +0000 |
| commit | 7fde1484af21f9668e9575bd8a119ebc4fe6fe42 (patch) | |
| tree | 99e62de525a9976f355f5916bdcad5c6a0bfba64 /Documentation | |
| parent | ed13134ba8c021d484d712a54c285da312567b39 (diff) | |
iio: dpot-dac: DAC driver based on a digital potentiometer
It is assumed that the dpot is used as a voltage divider between the
current dpot wiper setting and the maximum resistance of the dpot. The
divided voltage is provided by a vref regulator.
.------.
.-----------. | |
| vref |--' .---.
| regulator |--. | |
'-----------' | | d |
| | p |
| | o | wiper
| | t |<---------+
| | |
| '---' dac output voltage
| |
'------+------------+
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-iio-dac-dpot-dac | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio-dac-dpot-dac b/Documentation/ABI/testing/sysfs-bus-iio-dac-dpot-dac new file mode 100644 index 000000000000..580e93f373f6 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-dac-dpot-dac @@ -0,0 +1,8 @@ +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw_available +Date: October 2016 +KernelVersion: 4.9 +Contact: Peter Rosin <peda@axentia.se> +Description: + The range of available values represented as the minimum value, + the step and the maximum value, all enclosed in square brackets. + Example: [0 1 256] |