Commit | Line | Data |
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24c1aa85 NG |
1 | Kernel Driver IBMPOWERNV |
2 | ======================== | |
3 | ||
4 | Supported systems: | |
a4710b72 | 5 | |
24c1aa85 NG |
6 | * Any recent IBM P servers based on POWERNV platform |
7 | ||
8 | Author: Neelesh Gupta | |
9 | ||
10 | Description | |
11 | ----------- | |
12 | ||
13 | This driver implements reading the platform sensors data like temperature/fan/ | |
14 | voltage/power for 'POWERNV' platform. | |
15 | ||
16 | The driver uses the platform device infrastructure. It probes the device tree | |
17 | for sensor devices during the __init phase and registers them with the 'hwmon'. | |
18 | 'hwmon' populates the 'sysfs' tree having attribute files, each for a given | |
19 | sensor type and its attribute data. | |
20 | ||
21 | All the nodes in the DT appear under "/ibm,opal/sensors" and each valid node in | |
22 | the DT maps to an attribute file in 'sysfs'. The node exports unique 'sensor-id' | |
23 | which the driver uses to make an OPAL call to the firmware. | |
24 | ||
25 | Usage notes | |
26 | ----------- | |
27 | The driver is built statically with the kernel by enabling the config | |
28 | CONFIG_SENSORS_IBMPOWERNV. It can also be built as module 'ibmpowernv'. | |
29 | ||
30 | Sysfs attributes | |
31 | ---------------- | |
32 | ||
a4710b72 | 33 | ======================= ======================================================= |
24c1aa85 NG |
34 | fanX_input Measured RPM value. |
35 | fanX_min Threshold RPM for alert generation. | |
a4710b72 MCC |
36 | fanX_fault - 0: No fail condition |
37 | - 1: Failing fan | |
e0da9912 | 38 | |
24c1aa85 NG |
39 | tempX_input Measured ambient temperature. |
40 | tempX_max Threshold ambient temperature for alert generation. | |
e0da9912 SB |
41 | tempX_highest Historical maximum temperature |
42 | tempX_lowest Historical minimum temperature | |
43 | tempX_enable Enable/disable all temperature sensors belonging to the | |
44 | sub-group. In POWER9, this attribute corresponds to | |
45 | each OCC. Using this attribute each OCC can be asked to | |
46 | disable/enable all of its temperature sensors. | |
a4710b72 MCC |
47 | |
48 | - 1: Enable | |
49 | - 0: Disable | |
e0da9912 SB |
50 | |
51 | inX_input Measured power supply voltage (millivolt) | |
a4710b72 MCC |
52 | inX_fault - 0: No fail condition. |
53 | - 1: Failing power supply. | |
e0da9912 SB |
54 | inX_highest Historical maximum voltage |
55 | inX_lowest Historical minimum voltage | |
56 | inX_enable Enable/disable all voltage sensors belonging to the | |
57 | sub-group. In POWER9, this attribute corresponds to | |
58 | each OCC. Using this attribute each OCC can be asked to | |
59 | disable/enable all of its voltage sensors. | |
a4710b72 MCC |
60 | |
61 | - 1: Enable | |
62 | - 0: Disable | |
e0da9912 SB |
63 | |
64 | powerX_input Power consumption (microWatt) | |
65 | powerX_input_highest Historical maximum power | |
66 | powerX_input_lowest Historical minimum power | |
67 | powerX_enable Enable/disable all power sensors belonging to the | |
68 | sub-group. In POWER9, this attribute corresponds to | |
69 | each OCC. Using this attribute each OCC can be asked to | |
70 | disable/enable all of its power sensors. | |
a4710b72 MCC |
71 | |
72 | - 1: Enable | |
73 | - 0: Disable | |
e0da9912 SB |
74 | |
75 | currX_input Measured current (milliampere) | |
76 | currX_highest Historical maximum current | |
77 | currX_lowest Historical minimum current | |
78 | currX_enable Enable/disable all current sensors belonging to the | |
79 | sub-group. In POWER9, this attribute corresponds to | |
80 | each OCC. Using this attribute each OCC can be asked to | |
81 | disable/enable all of its current sensors. | |
a4710b72 MCC |
82 | |
83 | - 1: Enable | |
84 | - 0: Disable | |
e0da9912 SB |
85 | |
86 | energyX_input Cumulative energy (microJoule) | |
a4710b72 | 87 | ======================= ======================================================= |