arch/x86/kernel/cpu/cpufreq/Kconfig

   1 #
   2 # CPU Frequency scaling
   3 #
   4
   5 menu "CPU Frequency scaling"
   6
   7 source "drivers/cpufreq/Kconfig"
   8
   9 if CPU_FREQ
  10
  11 comment "CPUFreq processor drivers"
  12
  13 config X86_ACPI_CPUFREQ
  14         tristate "ACPI Processor P-States driver"
  15         select CPU_FREQ_TABLE
  16         depends on ACPI_PROCESSOR
  17         help
  18           This driver adds a CPUFreq driver which utilizes the ACPI
  19           Processor Performance States.
  20           This driver also supports Intel Enhanced Speedstep.
  21
  22           For details, take a look at <file:Documentation/cpu-freq/>.
  23
  24           If in doubt, say N.
  25
  26 config ELAN_CPUFREQ
  27         tristate "AMD Elan SC400 and SC410"
  28         select CPU_FREQ_TABLE
  29         depends on X86_ELAN
  30         ---help---
  31           This adds the CPUFreq driver for AMD Elan SC400 and SC410
  32           processors.
  33
  34           You need to specify the processor maximum speed as boot
  35           parameter: elanfreq=maxspeed (in kHz) or as module
  36           parameter "max_freq".
  37
  38           For details, take a look at <file:Documentation/cpu-freq/>.
  39
  40           If in doubt, say N.
  41
  42 config SC520_CPUFREQ
  43         tristate "AMD Elan SC520"
  44         select CPU_FREQ_TABLE
  45         depends on X86_ELAN
  46         ---help---
  47           This adds the CPUFreq driver for AMD Elan SC520 processor.
  48
  49           For details, take a look at <file:Documentation/cpu-freq/>.
  50
  51           If in doubt, say N.
  52
  53
  54 config X86_POWERNOW_K6
  55         tristate "AMD Mobile K6-2/K6-3 PowerNow!"
  56         select CPU_FREQ_TABLE
  57         help
  58           This adds the CPUFreq driver for mobile AMD K6-2+ and mobile
  59           AMD K6-3+ processors.
  60
  61           For details, take a look at <file:Documentation/cpu-freq/>.
  62
  63           If in doubt, say N.
  64
  65 config X86_POWERNOW_K7
  66         tristate "AMD Mobile Athlon/Duron PowerNow!"
  67         select CPU_FREQ_TABLE
  68         help
  69           This adds the CPUFreq driver for mobile AMD K7 mobile processors.
  70
  71           For details, take a look at <file:Documentation/cpu-freq/>.
  72
  73           If in doubt, say N.
  74
  75 config X86_POWERNOW_K7_ACPI
  76         bool
  77         depends on X86_POWERNOW_K7 && ACPI_PROCESSOR
  78         depends on !(X86_POWERNOW_K7 = y && ACPI_PROCESSOR = m)
  79         default y
  80
  81 config X86_POWERNOW_K8
  82         tristate "AMD Opteron/Athlon64 PowerNow!"
  83         select CPU_FREQ_TABLE
  84         depends on EXPERIMENTAL
  85         help
  86           This adds the CPUFreq driver for mobile AMD Opteron/Athlon64 processors.
  87
  88           For details, take a look at <file:Documentation/cpu-freq/>.
  89
  90           If in doubt, say N.
  91
  92 config X86_POWERNOW_K8_ACPI
  93         bool "ACPI Support"
  94         select ACPI_PROCESSOR
  95         depends on ACPI && X86_POWERNOW_K8
  96         default y
  97         help
  98           This provides access to the K8s Processor Performance States via ACPI.
  99           This driver is probably required for CPUFreq to work with multi-socket and
 100           SMP systems.  It is not required on at least some single-socket yet
 101           multi-core systems, even if SMP is enabled.
 102
 103           It is safe to say Y here.
 104
 105 config X86_GX_SUSPMOD
 106         tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation"
 107         depends on PCI
 108         help
 109          This add the CPUFreq driver for NatSemi Geode processors which
 110          support suspend modulation.
 111
 112          For details, take a look at <file:Documentation/cpu-freq/>.
 113
 114          If in doubt, say N.
 115
 116 config X86_SPEEDSTEP_CENTRINO
 117         tristate "Intel Enhanced SpeedStep"
 118         select CPU_FREQ_TABLE
 119         select X86_SPEEDSTEP_CENTRINO_TABLE
 120         help
 121           This adds the CPUFreq driver for Enhanced SpeedStep enabled
 122           mobile CPUs.  This means Intel Pentium M (Centrino) CPUs. However,
 123           you also need to say Y to "Use ACPI tables to decode..." below
 124           [which might imply enabling ACPI] if you want to use this driver
 125           on non-Banias CPUs.
 126
 127           For details, take a look at <file:Documentation/cpu-freq/>.
 128
 129           If in doubt, say N.
 130
 131 config X86_SPEEDSTEP_CENTRINO_TABLE
 132         bool "Built-in tables for Banias CPUs"
 133         depends on X86_SPEEDSTEP_CENTRINO
 134         default y
 135         help
 136           Use built-in tables for Banias CPUs if ACPI encoding
 137           is not available.
 138
 139           If in doubt, say N.
 140
 141 config X86_SPEEDSTEP_ICH
 142         tristate "Intel Speedstep on ICH-M chipsets (ioport interface)"
 143         select CPU_FREQ_TABLE
 144         help
 145           This adds the CPUFreq driver for certain mobile Intel Pentium III
 146           (Coppermine), all mobile Intel Pentium III-M (Tualatin) and all
 147           mobile Intel Pentium 4 P4-M on systems which have an Intel ICH2,
 148           ICH3 or ICH4 southbridge.
 149
 150           For details, take a look at <file:Documentation/cpu-freq/>.
 151
 152           If in doubt, say N.
 153
 154 config X86_SPEEDSTEP_SMI
 155         tristate "Intel SpeedStep on 440BX/ZX/MX chipsets (SMI interface)"
 156         select CPU_FREQ_TABLE
 157         depends on EXPERIMENTAL
 158         help
 159           This adds the CPUFreq driver for certain mobile Intel Pentium III
 160           (Coppermine), all mobile Intel Pentium III-M (Tualatin)
 161           on systems which have an Intel 440BX/ZX/MX southbridge.
 162
 163           For details, take a look at <file:Documentation/cpu-freq/>.
 164
 165           If in doubt, say N.
 166
 167 config X86_P4_CLOCKMOD
 168         tristate "Intel Pentium 4 clock modulation"
 169         select CPU_FREQ_TABLE
 170         help
 171           This adds the CPUFreq driver for Intel Pentium 4 / XEON
 172           processors.
 173
 174           For details, take a look at <file:Documentation/cpu-freq/>.
 175
 176           If in doubt, say N.
 177
 178 config X86_CPUFREQ_NFORCE2
 179         tristate "nVidia nForce2 FSB changing"
 180         depends on EXPERIMENTAL
 181         help
 182           This adds the CPUFreq driver for FSB changing on nVidia nForce2
 183           platforms.
 184
 185           For details, take a look at <file:Documentation/cpu-freq/>.
 186
 187           If in doubt, say N.
 188
 189 config X86_LONGRUN
 190         tristate "Transmeta LongRun"
 191         help
 192           This adds the CPUFreq driver for Transmeta Crusoe and Efficeon processors
 193           which support LongRun.
 194
 195           For details, take a look at <file:Documentation/cpu-freq/>.
 196
 197           If in doubt, say N.
 198
 199 config X86_LONGHAUL
 200         tristate "VIA Cyrix III Longhaul"
 201         select CPU_FREQ_TABLE
 202         depends on ACPI_PROCESSOR
 203         help
 204           This adds the CPUFreq driver for VIA Samuel/CyrixIII,
 205           VIA Cyrix Samuel/C3, VIA Cyrix Ezra and VIA Cyrix Ezra-T
 206           processors.
 207
 208           For details, take a look at <file:Documentation/cpu-freq/>.
 209
 210           If in doubt, say N.
 211
 212 config X86_E_POWERSAVER
 213         tristate "VIA C7 Enhanced PowerSaver (EXPERIMENTAL)"
 214         select CPU_FREQ_TABLE
 215         depends on EXPERIMENTAL
 216         help
 217           This adds the CPUFreq driver for VIA C7 processors.
 218
 219           If in doubt, say N.
 220
 221 comment "shared options"
 222
 223 config X86_ACPI_CPUFREQ_PROC_INTF
 224         bool "/proc/acpi/processor/../performance interface (deprecated)"
 225         depends on PROC_FS
 226         depends on X86_ACPI_CPUFREQ || X86_POWERNOW_K7_ACPI || X86_POWERNOW_K8_ACPI
 227         help
 228           This enables the deprecated /proc/acpi/processor/../performance
 229           interface. While it is helpful for debugging, the generic,
 230           cross-architecture cpufreq interfaces should be used.
 231
 232           If in doubt, say N.
 233
 234 config X86_SPEEDSTEP_LIB
 235         tristate
 236         default X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD
 237
 238 config X86_SPEEDSTEP_RELAXED_CAP_CHECK
 239         bool "Relaxed speedstep capability checks"
 240         depends on (X86_SPEEDSTEP_SMI || X86_SPEEDSTEP_ICH)
 241         help
 242           Don't perform all checks for a speedstep capable system which would
 243           normally be done. Some ancient or strange systems, though speedstep
 244           capable, don't always indicate that they are speedstep capable. This
 245           option lets the probing code bypass some of those checks if the
 246           parameter "relaxed_check=1" is passed to the module.
 247
 248 endif   # CPU_FREQ
 249
 250 endmenu