xref: /openbmc/phosphor-pid-control/util.cpp (revision 7a841b62)
1 /**
2  * Copyright 2017 Google Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *     http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include <string>
18 
19 #include "util.hpp"
20 
21 
22 static constexpr auto external_sensor =
23     "/xyz/openbmc_project/extsensors/"; // type/
24 static constexpr auto openbmc_sensor = "/xyz/openbmc_project/"; // type/
25 static constexpr auto sysfs = "/sys/";
26 
27 
28 IOInterfaceType GetWriteInterfaceType(const std::string& path)
29 {
30     if (path.empty() || "None" == path)
31     {
32         return IOInterfaceType::NONE;
33     }
34 
35     if (path.find(sysfs) != std::string::npos)
36     {
37         // A sysfs read sensor.
38         return IOInterfaceType::SYSFS;
39     }
40 
41     return IOInterfaceType::UNKNOWN;
42 }
43 
44 IOInterfaceType GetReadInterfaceType(const std::string& path)
45 {
46     if (path.empty() || "None" == path)
47     {
48         return IOInterfaceType::NONE;
49     }
50 
51     if (path.find(external_sensor) != std::string::npos)
52     {
53         return IOInterfaceType::EXTERNAL;
54     }
55 
56     if (path.find(openbmc_sensor) != std::string::npos)
57     {
58         return IOInterfaceType::DBUSPASSIVE;
59     }
60 
61     if (path.find(sysfs) != std::string::npos)
62     {
63         return IOInterfaceType::SYSFS;
64     }
65 
66     return IOInterfaceType::UNKNOWN;
67 }
68 
69