From 0db52a520bea056311c80a3e1eb7361ac9aa2b8e Mon Sep 17 00:00:00 2001
From: Trung Tran <trung.tran@ettus.com>
Date: Thu, 21 Dec 2017 18:22:37 -0800
Subject: mpm: Add sysfs_thermal module

This will provide an API call to read thermal values via udev.
---
 mpm/python/usrp_mpm/sys_utils/CMakeLists.txt   |  1 +
 mpm/python/usrp_mpm/sys_utils/sysfs_thermal.py | 26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+)
 create mode 100644 mpm/python/usrp_mpm/sys_utils/sysfs_thermal.py

(limited to 'mpm/python')

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]
-- 
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