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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. | ||