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# Copyright 2015 ARM Limited
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import re
from devlib.module import Module
class TripPoint(object):
def __init__(self, zone, _id):
self._id = _id
self.zone = zone
self.temp_node = 'trip_point_' + _id + '_temp'
self.type_node = 'trip_point_' + _id + '_type'
@property
def target(self):
return self.zone.target
def get_temperature(self):
"""Returns the currently configured temperature of the trip point"""
temp_file = self.target.path.join(self.zone.path, self.temp_node)
return self.target.read_int(temp_file)
def set_temperature(self, temperature):
temp_file = self.target.path.join(self.zone.path, self.temp_node)
self.target.write_value(temp_file, temperature)
def get_type(self):
"""Returns the type of trip point"""
type_file = self.target.path.join(self.zone.path, self.type_node)
return self.target.read_value(type_file)
class ThermalZone(object):
def __init__(self, target, root, _id):
self.target = target
self.name = 'thermal_zone' + _id
self.path = target.path.join(root, self.name)
self.trip_points = {}
for entry in self.target.list_directory(self.path):
re_match = re.match('^trip_point_([0-9]+)_temp', entry)
if re_match is not None:
self.add_trip_point(re_match.group(1))
def add_trip_point(self, _id):
self.trip_points[int(_id)] = TripPoint(self, _id)
def is_enabled(self):
"""Returns a boolean representing the 'mode' of the thermal zone"""
value = self.target.read_value(self.target.path.join(self.path, 'mode'))
return value == 'enabled'
def set_mode(self, enable):
value = 'enabled' if enable else 'disabled'
self.target.write_value(self.target.path.join(self.path, 'mode'), value)
def get_temperature(self):
"""Returns the temperature of the thermal zone"""
temp_file = self.target.path.join(self.path, 'temp')
return self.target.read_int(temp_file)
class ThermalModule(Module):
name = 'thermal'
thermal_root = '/sys/class/thermal'
@staticmethod
def probe(target):
if target.file_exists(ThermalModule.thermal_root):
return True
def __init__(self, target):
super(ThermalModule, self).__init__(target)
self.zones = {}
self.cdevs = []
for entry in target.list_directory(self.thermal_root):
re_match = re.match('^(thermal_zone|cooling_device)([0-9]+)', entry)
if re_match.group(1) == 'thermal_zone':
self.add_thermal_zone(re_match.group(2))
elif re_match.group(1) == 'cooling_device':
# TODO
pass
def add_thermal_zone(self, _id):
self.zones[int(_id)] = ThermalZone(self.target, self.thermal_root, _id)
def disable_all_zones(self):
"""Disables all the thermal zones in the target"""
for zone in self.zones:
zone.set_mode('disabled')
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