Linux kernel CPUfreq subsystem - hardware

The Linux kernel CPUfreq subsystem can only work on a system if the hardware supports CPU frequency scaling and a device driver exists. This list only contains

Here follows a list of hard- and firmware cpufreq drivers try to work on.

• x86 / x86_64 architecture
  • generic ACPI P-States based driver (acpi-cpufreq)
  • AMD Elan - SC400, SC410 (elanfreq)
  • AMD mobile K6-2/3+ PowerNow! (powernow-k6)
  • AMD mobile Athlon PowerNow! (powernow-k7)
  • AMD Cool&Quiet PowerNow! (powernow-k8)
  • Intel SpeedStep using the SMI BIOS interface (speedstep-smi)
  • Intel SpeedStep on ICH-based chipsets (speedstep-ich)
  • Intel Enhanced SpeedStep (speedstep-centrino)
  • Intel Pentium4/Xeon clock modulation (p4-clockmod)
  • NatSemi Geode GX / Cyrix MediaGXm (gx-suspmod)
  • Transmeta Crusoe / Efficeon LongRun (longrun)
  • VIA Cyrix Longhaul (longhaul)
• ARM
  • ARM Integrator
  • ARM SA1100, SA1110
• PowerPC
  • Titanium PowerBook 400 (PMU based, 300Mhz & 400Mhz)
  • Titanium PowerBook 500 (PMU based, 300Mhz & 500Mhz)
  • Titanium PowerBook 800 (PMU based, 667Mhz & 800Mhz)
  • Titanium PowerBook 1Ghz (PMU based, 667Mhz & 1Ghz)
  • iBook2 500 (PMU based, 400Mhz & 500Mhz)
  • iBook2 600 (PMU based, 400Mhz & 600Mhz)
  • iBook2 700 (CPU based, 400Mhz & 700Mhz, support low voltage)
  • Recent MacRISC3 laptops
  • iBook G4s and PowerBook G4s with 7447A CPUs
• sparc64
  • UltraSPARC-IIe (us2e_cpufreq)
  • UltraSPARC-III (us3_cpufreq)
• SuperH
  • SH-3
  • SH-4

Unsupported hardware

• TBD

Linux is a registered trademark of Linus Torvalds.
Other names mentiond on this website may be registered trademarks of others.
 
Dominik Brodowski