Sergei Trofimov | 4e6afe9 | 2015-10-09 09:30:04 +0100 | [diff] [blame] | 1 | # Copyright 2015 ARM Limited |
| 2 | # |
| 3 | # Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | # you may not use this file except in compliance with the License. |
| 5 | # You may obtain a copy of the License at |
| 6 | # |
| 7 | # http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | # |
| 9 | # Unless required by applicable law or agreed to in writing, software |
| 10 | # distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | # See the License for the specific language governing permissions and |
| 13 | # limitations under the License. |
| 14 | # |
| 15 | import re |
| 16 | from collections import defaultdict |
| 17 | |
| 18 | from devlib.module import Module |
| 19 | from devlib.utils.types import integer |
| 20 | |
| 21 | |
| 22 | HWMON_ROOT = '/sys/class/hwmon' |
| 23 | HWMON_FILE_REGEX = re.compile(r'(?P<kind>\w+?)(?P<number>\d+)_(?P<item>\w+)') |
| 24 | |
| 25 | |
| 26 | class HwmonSensor(object): |
| 27 | |
| 28 | def __init__(self, device, path, kind, number): |
| 29 | self.device = device |
| 30 | self.path = path |
| 31 | self.kind = kind |
| 32 | self.number = number |
| 33 | self.target = self.device.target |
| 34 | self.name = '{}/{}{}'.format(self.device.name, self.kind, self.number) |
| 35 | self.label = self.name |
| 36 | self.items = set() |
| 37 | |
| 38 | def add(self, item): |
| 39 | self.items.add(item) |
| 40 | if item == 'label': |
| 41 | self.label = self.get('label') |
| 42 | |
| 43 | def get(self, item): |
| 44 | path = self.get_file(item) |
| 45 | value = self.target.read_value(path) |
| 46 | try: |
| 47 | return integer(value) |
| 48 | except (TypeError, ValueError): |
| 49 | return value |
| 50 | |
| 51 | def set(self, item, value): |
| 52 | path = self.get_file(item) |
| 53 | self.target.write_value(path, value) |
| 54 | |
| 55 | def get_file(self, item): |
| 56 | if item not in self.items: |
| 57 | raise ValueError('item "{}" does not exist for {}'.format(item, self.name)) |
| 58 | filename = '{}{}_{}'.format(self.kind, self.number, item) |
| 59 | return self.target.path.join(self.path, filename) |
| 60 | |
| 61 | def __str__(self): |
| 62 | if self.name != self.label: |
| 63 | text = 'HS({}, {})'.format(self.name, self.label) |
| 64 | else: |
| 65 | text = 'HS({})'.format(self.name) |
| 66 | return text |
| 67 | |
| 68 | __repr__ = __str__ |
| 69 | |
| 70 | |
| 71 | class HwmonDevice(object): |
| 72 | |
| 73 | @property |
| 74 | def sensors(self): |
| 75 | all_sensors = [] |
| 76 | for sensors_of_kind in self._sensors.itervalues(): |
| 77 | all_sensors.extend(sensors_of_kind.values()) |
| 78 | return all_sensors |
| 79 | |
| 80 | def __init__(self, target, path): |
| 81 | self.target = target |
| 82 | self.path = path |
| 83 | self.name = self.target.read_value(self.target.path.join(self.path, 'name')) |
| 84 | self._sensors = defaultdict(dict) |
| 85 | path = self.path |
| 86 | if not path.endswith(self.target.path.sep): |
| 87 | path += self.target.path.sep |
Brendan Jackman | beaa229 | 2017-01-04 11:21:22 +0000 | [diff] [blame] | 88 | for entry in self.target.list_directory(path, |
| 89 | as_root=self.target.is_rooted): |
Sergei Trofimov | 4e6afe9 | 2015-10-09 09:30:04 +0100 | [diff] [blame] | 90 | match = HWMON_FILE_REGEX.search(entry) |
| 91 | if match: |
| 92 | kind = match.group('kind') |
| 93 | number = int(match.group('number')) |
| 94 | item = match.group('item') |
| 95 | if number not in self._sensors[kind]: |
| 96 | sensor = HwmonSensor(self, self.path, kind, number) |
| 97 | self._sensors[kind][number] = sensor |
| 98 | self._sensors[kind][number].add(item) |
| 99 | |
| 100 | def get(self, kind, number=None): |
| 101 | if number is None: |
| 102 | return [s for _, s in sorted(self._sensors[kind].iteritems(), |
| 103 | key=lambda x: x[0])] |
| 104 | else: |
| 105 | return self._sensors[kind].get(number) |
| 106 | |
| 107 | def __str__(self): |
| 108 | return 'HD({})'.format(self.name) |
| 109 | |
| 110 | __repr__ = __str__ |
| 111 | |
| 112 | |
| 113 | class HwmonModule(Module): |
| 114 | |
| 115 | name = 'hwmon' |
| 116 | |
| 117 | @staticmethod |
| 118 | def probe(target): |
| 119 | return target.file_exists(HWMON_ROOT) |
| 120 | |
| 121 | @property |
| 122 | def sensors(self): |
| 123 | all_sensors = [] |
| 124 | for device in self.devices: |
| 125 | all_sensors.extend(device.sensors) |
| 126 | return all_sensors |
| 127 | |
| 128 | def __init__(self, target): |
| 129 | super(HwmonModule, self).__init__(target) |
| 130 | self.root = HWMON_ROOT |
| 131 | self.devices = [] |
| 132 | self.scan() |
| 133 | |
| 134 | def scan(self): |
Brendan Jackman | beaa229 | 2017-01-04 11:21:22 +0000 | [diff] [blame] | 135 | for entry in self.target.list_directory(self.root, |
| 136 | as_root=self.target.is_rooted): |
Sergei Trofimov | 4e6afe9 | 2015-10-09 09:30:04 +0100 | [diff] [blame] | 137 | if entry.startswith('hwmon'): |
| 138 | entry_path = self.target.path.join(self.root, entry) |
| 139 | if self.target.file_exists(self.target.path.join(entry_path, 'name')): |
| 140 | device = HwmonDevice(self.target, entry_path) |
| 141 | self.devices.append(device) |
| 142 | |