diff options
| author | Paresh Chaudhary <paresh.chaudhary@rockwellcollins.com> | 2019-03-26 12:18:42 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2019-04-04 20:21:05 +0100 |
| commit | fb55a51310d1791b439e8d70f693410f5ef616a4 (patch) | |
| tree | 1b0d16fdf5dd65220d93cd244eeac31f37381459 /Documentation/ABI | |
| parent | 8fede567b8472b36e2af3eac94ba68b234533bac (diff) | |
| download | linux-fb55a51310d1791b439e8d70f693410f5ef616a4.tar.bz2 | |
iio:temperature: Add MAX31856 thermocouple support
This patch adds support for Maxim MAX31856 thermocouple
temperature sensor support.
More information can be found in:
https://www.maximintegrated.com/en/ds/MAX31856.pdf
NOTE: Driver support only Comparator Mode.
Signed-off-by: Paresh Chaudhary <paresh.chaudhary@rockwellcollins.com>
Signed-off-by: Matt Weber <matthew.weber@rockwellcollins.com>
Signed-off-by: Patrick Havelange <patrick.havelange@essensium.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-iio-temperature-max31856 | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio-temperature-max31856 b/Documentation/ABI/testing/sysfs-bus-iio-temperature-max31856 new file mode 100644 index 000000000000..3b3509a3ef2f --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-temperature-max31856 @@ -0,0 +1,24 @@ +What: /sys/bus/iio/devices/iio:deviceX/fault_oc +KernelVersion: 5.1 +Contact: linux-iio@vger.kernel.org +Description: + Open-circuit fault. The detection of open-circuit faults, + such as those caused by broken thermocouple wires. + Reading returns either '1' or '0'. + '1' = An open circuit such as broken thermocouple wires + has been detected. + '0' = No open circuit or broken thermocouple wires are detected + +What: /sys/bus/iio/devices/iio:deviceX/fault_ovuv +KernelVersion: 5.1 +Contact: linux-iio@vger.kernel.org +Description: + Overvoltage or Undervoltage Input Fault. The internal circuitry + is protected from excessive voltages applied to the thermocouple + cables by integrated MOSFETs at the T+ and T- inputs, and the + BIAS output. These MOSFETs turn off when the input voltage is + negative or greater than VDD. + Reading returns either '1' or '0'. + '1' = The input voltage is negative or greater than VDD. + '0' = The input voltage is positive and less than VDD (normal + state). |