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Commit | Line | Data |
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512d1027 AH |
1 | Kernel driver fam15h_power |
2 | ========================== | |
3 | ||
4 | Supported chips: | |
5 | * AMD Family 15h Processors | |
6 | ||
7 | Prefix: 'fam15h_power' | |
8 | Addresses scanned: PCI space | |
9 | Datasheets: | |
10 | BIOS and Kernel Developer's Guide (BKDG) For AMD Family 15h Processors | |
11 | (not yet published) | |
12 | ||
13 | Author: Andreas Herrmann <andreas.herrmann3@amd.com> | |
14 | ||
15 | Description | |
16 | ----------- | |
17 | ||
18 | This driver permits reading of registers providing power information | |
19 | of AMD Family 15h processors. | |
20 | ||
21 | For AMD Family 15h processors the following power values can be | |
22 | calculated using different processor northbridge function registers: | |
23 | ||
24 | * BasePwrWatts: Specifies in watts the maximum amount of power | |
25 | consumed by the processor for NB and logic external to the core. | |
26 | * ProcessorPwrWatts: Specifies in watts the maximum amount of power | |
27 | the processor can support. | |
28 | * CurrPwrWatts: Specifies in watts the current amount of power being | |
29 | consumed by the processor. | |
30 | ||
31 | This driver provides ProcessorPwrWatts and CurrPwrWatts: | |
32 | * power1_crit (ProcessorPwrWatts) | |
33 | * power1_input (CurrPwrWatts) | |
34 | ||
35 | On multi-node processors the calculated value is for the entire | |
36 | package and not for a single node. Thus the driver creates sysfs | |
37 | attributes only for internal node0 of a multi-node processor. |