mpm: Add sysfs_thermal module

This will provide an API call to read thermal values via udev.

2 files changed, 27 insertions, 0 deletions

diff --git a/mpm/python/usrp_mpm/sys_utils/CMakeLists.txt b/mpm/python/usrp_mpm/sys_utils/CMakeLists.txt
index 1b5a4ed0e..bb91418ac 100644
--- a/mpm/python/usrp_mpm/sys_utils/CMakeLists.txt
+++ b/mpm/python/usrp_mpm/sys_utils/CMakeLists.txt
@@ -10,6 +10,7 @@ SET(USRP_MPM_SYSUTILS_FILES
     ${CMAKE_CURRENT_SOURCE_DIR}/dtoverlay.py
     ${CMAKE_CURRENT_SOURCE_DIR}/net.py
     ${CMAKE_CURRENT_SOURCE_DIR}/sysfs_gpio.py
+    ${CMAKE_CURRENT_SOURCE_DIR}/sysfs_thermal.py
     ${CMAKE_CURRENT_SOURCE_DIR}/udev.py
     ${CMAKE_CURRENT_SOURCE_DIR}/uio.py
 )
diff --git a/mpm/python/usrp_mpm/sys_utils/sysfs_thermal.py b/mpm/python/usrp_mpm/sys_utils/sysfs_thermal.py
new file mode 100644
index 000000000..8b1098469
--- /dev/null
+++ b/mpm/python/usrp_mpm/sys_utils/sysfs_thermal.py
@@ -0,0 +1,26 @@
+#
+# Copyright 2017 Ettus Research, A National Instruments Company
+#
+# SPDX-License-Identifier: GPL-3.0
+"""
+sysfs thermal sensors API
+"""
+
+import pyudev
+
+def read_thermal_sensor_value(sensor_type, data_probe):
+    """
+    This function will return the float value of the thermal sensor
+    which is under thermal subsystem.
+
+    Arguments:
+    sensor_type -- Is attribute "type" of udev.  This can be fpga-thermal-zone,
+                   magnesium-db0-zone, etc.
+    data_probe -- is one of the attribute of that sensor. This can be 'temp' in
+                  the case of thermal-zone or 'cur_state' in the case of a
+                  cooling device.
+    """
+    reading_sensors = [x.attributes.asint(data_probe) for x in pyudev.Context()
+                       .list_devices(subsystem='thermal')
+                       .match_attribute('type', sensor_type)]
+    return reading_sensors[0]