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authorParesh Chaudhary <paresh.chaudhary@rockwellcollins.com>2019-03-26 12:18:42 +0100
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2019-04-04 20:21:05 +0100
commitfb55a51310d1791b439e8d70f693410f5ef616a4 (patch)
tree1b0d16fdf5dd65220d93cd244eeac31f37381459 /Documentation/ABI
parent8fede567b8472b36e2af3eac94ba68b234533bac (diff)
downloadlinux-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-max3185624
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
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+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).