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