| Andreas Herrmann | 512d102 | 2011-05-25 20:43:31 +0200 | [diff] [blame] | 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. |