arch/i386/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
  21           For details, take a look at <file:Documentation/cpu-freq/>.
  22
  23           If in doubt, say N.
  24
  25 config ELAN_CPUFREQ
  26         tristate "AMD Elan"
  27         select CPU_FREQ_TABLE
  28         depends on X86_ELAN
  29         ---help---
  30           This adds the CPUFreq driver for AMD Elan SC400 and SC410
  31           processors.
  32
  33           You need to specify the processor maximum speed as boot
  34           parameter: elanfreq=maxspeed (in kHz) or as module
  35           parameter "max_freq".
  36
  37           For details, take a look at <file:Documentation/cpu-freq/>.
  38
  39           If in doubt, say N.
  40
  41 config X86_POWERNOW_K6
  42         tristate "AMD Mobile K6-2/K6-3 PowerNow!"
  43         select CPU_FREQ_TABLE
  44         help
  45           This adds the CPUFreq driver for mobile AMD K6-2+ and mobile
  46           AMD K6-3+ processors.
  47
  48           For details, take a look at <file:Documentation/cpu-freq/>.
  49
  50           If in doubt, say N.
  51
  52 config X86_POWERNOW_K7
  53         tristate "AMD Mobile Athlon/Duron PowerNow!"
  54         select CPU_FREQ_TABLE
  55         help
  56           This adds the CPUFreq driver for mobile AMD K7 mobile processors.
  57
  58           For details, take a look at <file:Documentation/cpu-freq/>.
  59
  60           If in doubt, say N.
  61
  62 config X86_POWERNOW_K7_ACPI
  63         bool
  64         depends on X86_POWERNOW_K7 && ACPI_PROCESSOR
  65         depends on !(X86_POWERNOW_K7 = y && ACPI_PROCESSOR = m)
  66         default y
  67
  68 config X86_POWERNOW_K8
  69         tristate "AMD Opteron/Athlon64 PowerNow!"
  70         select CPU_FREQ_TABLE
  71         depends on EXPERIMENTAL
  72         help
  73           This adds the CPUFreq driver for mobile AMD Opteron/Athlon64 processors.
  74
  75           For details, take a look at <file:Documentation/cpu-freq/>.
  76
  77           If in doubt, say N.
  78
  79 config X86_POWERNOW_K8_ACPI
  80         bool
  81         depends on X86_POWERNOW_K8 && ACPI_PROCESSOR
  82         depends on !(X86_POWERNOW_K8 = y && ACPI_PROCESSOR = m)
  83         default y
  84
  85 config X86_GX_SUSPMOD
  86         tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation"
  87         help
  88          This add the CPUFreq driver for NatSemi Geode processors which
  89          support suspend modulation.
  90
  91          For details, take a look at <file:Documentation/cpu-freq/>.
  92
  93          If in doubt, say N.
  94
  95 config X86_SPEEDSTEP_CENTRINO
  96         tristate "Intel Enhanced SpeedStep"
  97         select CPU_FREQ_TABLE
  98         select X86_SPEEDSTEP_CENTRINO_TABLE if (!X86_SPEEDSTEP_CENTRINO_ACPI)
  99         help
 100           This adds the CPUFreq driver for Enhanced SpeedStep enabled
 101           mobile CPUs.  This means Intel Pentium M (Centrino) CPUs. However,
 102           you also need to say Y to "Use ACPI tables to decode..." below
 103           [which might imply enabling ACPI] if you want to use this driver
 104           on non-Banias CPUs.
 105
 106           For details, take a look at <file:Documentation/cpu-freq/>.
 107
 108           If in doubt, say N.
 109
 110 config X86_SPEEDSTEP_CENTRINO_ACPI
 111         bool "Use ACPI tables to decode valid frequency/voltage pairs"
 112         depends on X86_SPEEDSTEP_CENTRINO && ACPI_PROCESSOR
 113         depends on !(X86_SPEEDSTEP_CENTRINO = y && ACPI_PROCESSOR = m)
 114         default y
 115         help
 116           Use primarily the information provided in the BIOS ACPI tables
 117           to determine valid CPU frequency and voltage pairings. It is
 118           required for the driver to work on non-Banias CPUs.
 119
 120           If in doubt, say Y.
 121
 122 config X86_SPEEDSTEP_CENTRINO_TABLE
 123         bool "Built-in tables for Banias CPUs"
 124         depends on X86_SPEEDSTEP_CENTRINO
 125         default y
 126         help
 127           Use built-in tables for Banias CPUs if ACPI encoding
 128           is not available.
 129
 130           If in doubt, say N.
 131
 132 config X86_SPEEDSTEP_ICH
 133         tristate "Intel Speedstep on ICH-M chipsets (ioport interface)"
 134         select CPU_FREQ_TABLE
 135         help
 136           This adds the CPUFreq driver for certain mobile Intel Pentium III
 137           (Coppermine), all mobile Intel Pentium III-M (Tualatin) and all
 138           mobile Intel Pentium 4 P4-M on systems which have an Intel ICH2,
 139           ICH3 or ICH4 southbridge.
 140
 141           For details, take a look at <file:Documentation/cpu-freq/>.
 142
 143           If in doubt, say N.
 144
 145 config X86_SPEEDSTEP_SMI
 146         tristate "Intel SpeedStep on 440BX/ZX/MX chipsets (SMI interface)"
 147         select CPU_FREQ_TABLE
 148         depends on EXPERIMENTAL
 149         help
 150           This adds the CPUFreq driver for certain mobile Intel Pentium III
 151           (Coppermine), all mobile Intel Pentium III-M (Tualatin)
 152           on systems which have an Intel 440BX/ZX/MX southbridge.
 153
 154           For details, take a look at <file:Documentation/cpu-freq/>.
 155
 156           If in doubt, say N.
 157
 158 config X86_P4_CLOCKMOD
 159         tristate "Intel Pentium 4 clock modulation"
 160         select CPU_FREQ_TABLE
 161         help
 162           This adds the CPUFreq driver for Intel Pentium 4 / XEON
 163           processors.
 164
 165           For details, take a look at <file:Documentation/cpu-freq/>.
 166
 167           If in doubt, say N.
 168
 169 config X86_CPUFREQ_NFORCE2
 170         tristate "nVidia nForce2 FSB changing"
 171         depends on EXPERIMENTAL
 172         help
 173           This adds the CPUFreq driver for FSB changing on nVidia nForce2
 174           platforms.
 175
 176           For details, take a look at <file:Documentation/cpu-freq/>.
 177
 178           If in doubt, say N.
 179
 180 config X86_LONGRUN
 181         tristate "Transmeta LongRun"
 182         help
 183           This adds the CPUFreq driver for Transmeta Crusoe and Efficeon processors
 184           which support LongRun.
 185
 186           For details, take a look at <file:Documentation/cpu-freq/>.
 187
 188           If in doubt, say N.
 189
 190 config X86_LONGHAUL
 191         tristate "VIA Cyrix III Longhaul"
 192         select CPU_FREQ_TABLE
 193         help
 194           This adds the CPUFreq driver for VIA Samuel/CyrixIII,
 195           VIA Cyrix Samuel/C3, VIA Cyrix Ezra and VIA Cyrix Ezra-T
 196           processors.
 197
 198           For details, take a look at <file:Documentation/cpu-freq/>.
 199
 200           If in doubt, say N.
 201
 202 comment "shared options"
 203
 204 config X86_ACPI_CPUFREQ_PROC_INTF
 205         bool "/proc/acpi/processor/../performance interface (deprecated)"
 206         depends on PROC_FS
 207         depends on X86_ACPI_CPUFREQ || X86_SPEEDSTEP_CENTRINO_ACPI || X86_POWERNOW_K7_ACPI || X86_POWERNOW_K8_ACPI
 208         help
 209           This enables the deprecated /proc/acpi/processor/../performance
 210           interface. While it is helpful for debugging, the generic,
 211           cross-architecture cpufreq interfaces should be used.
 212
 213           If in doubt, say N.
 214
 215 config X86_SPEEDSTEP_LIB
 216         tristate
 217         default X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD
 218
 219 config X86_SPEEDSTEP_RELAXED_CAP_CHECK
 220         bool "Relaxed speedstep capability checks"
 221         depends on (X86_SPEEDSTEP_SMI || X86_SPEEDSTEP_ICH)
 222         help
 223           Don't perform all checks for a speedstep capable system which would
 224           normally be done. Some ancient or strange systems, though speedstep
 225           capable, don't always indicate that they are speedstep capable. This
 226           option lets the probing code bypass some of those checks if the
 227           parameter "relaxed_check=1" is passed to the module.
 228
 229 endif   # CPU_FREQ
 230
 231 endmenu