projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| d034fbf0 | 13 | Author: Andreas Herrmann <herrmann.der.user@googlemail.com> |
| 512d1027 AH |
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. |