From fb55a51310d1791b439e8d70f693410f5ef616a4 Mon Sep 17 00:00:00 2001 From: Paresh Chaudhary Date: Tue, 26 Mar 2019 12:18:42 +0100 Subject: 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 Signed-off-by: Matt Weber Signed-off-by: Patrick Havelange Signed-off-by: Jonathan Cameron --- .../ABI/testing/sysfs-bus-iio-temperature-max31856 | 24 ++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-temperature-max31856 (limited to 'Documentation/ABI') 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). -- cgit v1.2.3