Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | # |
Dave Jones | bb0a56e | 2011-05-19 18:51:07 -0400 | [diff] [blame] | 2 | # x86 CPU Frequency scaling drivers |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | # |
| 4 | |
Naga Chumbalkar | 0f1d683 | 2009-12-17 20:18:27 +0000 | [diff] [blame] | 5 | config X86_PCC_CPUFREQ |
| 6 | tristate "Processor Clocking Control interface driver" |
| 7 | depends on ACPI && ACPI_PROCESSOR |
| 8 | help |
| 9 | This driver adds support for the PCC interface. |
| 10 | |
| 11 | For details, take a look at: |
| 12 | <file:Documentation/cpu-freq/pcc-cpufreq.txt>. |
| 13 | |
| 14 | To compile this driver as a module, choose M here: the |
| 15 | module will be called pcc-cpufreq. |
| 16 | |
| 17 | If in doubt, say N. |
| 18 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | config X86_ACPI_CPUFREQ |
| 20 | tristate "ACPI Processor P-States driver" |
| 21 | select CPU_FREQ_TABLE |
| 22 | depends on ACPI_PROCESSOR |
| 23 | help |
| 24 | This driver adds a CPUFreq driver which utilizes the ACPI |
| 25 | Processor Performance States. |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 26 | This driver also supports Intel Enhanced Speedstep and newer |
| 27 | AMD CPUs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 29 | To compile this driver as a module, choose M here: the |
| 30 | module will be called acpi-cpufreq. |
| 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 33 | |
| 34 | If in doubt, say N. |
| 35 | |
| 36 | config ELAN_CPUFREQ |
Dave Jones | bf6fc9f | 2005-05-31 19:03:45 -0700 | [diff] [blame] | 37 | tristate "AMD Elan SC400 and SC410" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | select CPU_FREQ_TABLE |
Ian Campbell | ce9c99a | 2011-04-08 07:42:29 +0100 | [diff] [blame] | 39 | depends on MELAN |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | ---help--- |
| 41 | This adds the CPUFreq driver for AMD Elan SC400 and SC410 |
| 42 | processors. |
| 43 | |
| 44 | You need to specify the processor maximum speed as boot |
| 45 | parameter: elanfreq=maxspeed (in kHz) or as module |
| 46 | parameter "max_freq". |
| 47 | |
| 48 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 49 | |
| 50 | If in doubt, say N. |
| 51 | |
Dave Jones | bf6fc9f | 2005-05-31 19:03:45 -0700 | [diff] [blame] | 52 | config SC520_CPUFREQ |
| 53 | tristate "AMD Elan SC520" |
| 54 | select CPU_FREQ_TABLE |
Ian Campbell | ce9c99a | 2011-04-08 07:42:29 +0100 | [diff] [blame] | 55 | depends on MELAN |
Dave Jones | bf6fc9f | 2005-05-31 19:03:45 -0700 | [diff] [blame] | 56 | ---help--- |
| 57 | This adds the CPUFreq driver for AMD Elan SC520 processor. |
| 58 | |
| 59 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 60 | |
| 61 | If in doubt, say N. |
| 62 | |
| 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | config X86_POWERNOW_K6 |
| 65 | tristate "AMD Mobile K6-2/K6-3 PowerNow!" |
| 66 | select CPU_FREQ_TABLE |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 67 | depends on X86_32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | help |
| 69 | This adds the CPUFreq driver for mobile AMD K6-2+ and mobile |
| 70 | AMD K6-3+ processors. |
| 71 | |
| 72 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 73 | |
| 74 | If in doubt, say N. |
| 75 | |
| 76 | config X86_POWERNOW_K7 |
| 77 | tristate "AMD Mobile Athlon/Duron PowerNow!" |
| 78 | select CPU_FREQ_TABLE |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 79 | depends on X86_32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | help |
| 81 | This adds the CPUFreq driver for mobile AMD K7 mobile processors. |
| 82 | |
| 83 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 84 | |
| 85 | If in doubt, say N. |
| 86 | |
| 87 | config X86_POWERNOW_K7_ACPI |
| 88 | bool |
| 89 | depends on X86_POWERNOW_K7 && ACPI_PROCESSOR |
| 90 | depends on !(X86_POWERNOW_K7 = y && ACPI_PROCESSOR = m) |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 91 | depends on X86_32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | default y |
| 93 | |
| 94 | config X86_POWERNOW_K8 |
| 95 | tristate "AMD Opteron/Athlon64 PowerNow!" |
| 96 | select CPU_FREQ_TABLE |
Thomas Renninger | 57f4fa6 | 2009-02-04 01:17:45 +0100 | [diff] [blame] | 97 | depends on ACPI && ACPI_PROCESSOR |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | help |
Andre Przywara | 034be8f | 2012-09-04 08:28:04 +0000 | [diff] [blame^] | 99 | This adds the CPUFreq driver for K8/early Opteron/Athlon64 processors. |
| 100 | Support for K10 and newer processors is now in acpi-cpufreq. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 102 | To compile this driver as a module, choose M here: the |
| 103 | module will be called powernow-k8. |
| 104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | config X86_GX_SUSPMOD |
| 108 | tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation" |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 109 | depends on X86_32 && PCI |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | help |
| 111 | This add the CPUFreq driver for NatSemi Geode processors which |
| 112 | support suspend modulation. |
| 113 | |
| 114 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 115 | |
| 116 | If in doubt, say N. |
| 117 | |
| 118 | config X86_SPEEDSTEP_CENTRINO |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 119 | tristate "Intel Enhanced SpeedStep (deprecated)" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | select CPU_FREQ_TABLE |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 121 | select X86_SPEEDSTEP_CENTRINO_TABLE if X86_32 |
| 122 | depends on X86_32 || (X86_64 && ACPI_PROCESSOR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | help |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 124 | This is deprecated and this functionality is now merged into |
| 125 | acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of |
| 126 | speedstep_centrino. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | This adds the CPUFreq driver for Enhanced SpeedStep enabled |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 128 | mobile CPUs. This means Intel Pentium M (Centrino) CPUs |
| 129 | or 64bit enabled Intel Xeons. |
| 130 | |
| 131 | To compile this driver as a module, choose M here: the |
| 132 | module will be called speedstep-centrino. |
Dave Jones | 388d6c5 | 2006-03-11 16:04:53 -0500 | [diff] [blame] | 133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | For details, take a look at <file:Documentation/cpu-freq/>. |
Dave Jones | 388d6c5 | 2006-03-11 16:04:53 -0500 | [diff] [blame] | 135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | If in doubt, say N. |
| 137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | config X86_SPEEDSTEP_CENTRINO_TABLE |
| 139 | bool "Built-in tables for Banias CPUs" |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 140 | depends on X86_32 && X86_SPEEDSTEP_CENTRINO |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | default y |
| 142 | help |
| 143 | Use built-in tables for Banias CPUs if ACPI encoding |
| 144 | is not available. |
| 145 | |
| 146 | If in doubt, say N. |
| 147 | |
| 148 | config X86_SPEEDSTEP_ICH |
| 149 | tristate "Intel Speedstep on ICH-M chipsets (ioport interface)" |
| 150 | select CPU_FREQ_TABLE |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 151 | depends on X86_32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | help |
| 153 | This adds the CPUFreq driver for certain mobile Intel Pentium III |
| 154 | (Coppermine), all mobile Intel Pentium III-M (Tualatin) and all |
Dave Jones | 388d6c5 | 2006-03-11 16:04:53 -0500 | [diff] [blame] | 155 | mobile Intel Pentium 4 P4-M on systems which have an Intel ICH2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | ICH3 or ICH4 southbridge. |
| 157 | |
| 158 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 159 | |
| 160 | If in doubt, say N. |
| 161 | |
| 162 | config X86_SPEEDSTEP_SMI |
| 163 | tristate "Intel SpeedStep on 440BX/ZX/MX chipsets (SMI interface)" |
| 164 | select CPU_FREQ_TABLE |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 165 | depends on X86_32 && EXPERIMENTAL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | help |
| 167 | This adds the CPUFreq driver for certain mobile Intel Pentium III |
Dave Jones | 388d6c5 | 2006-03-11 16:04:53 -0500 | [diff] [blame] | 168 | (Coppermine), all mobile Intel Pentium III-M (Tualatin) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | on systems which have an Intel 440BX/ZX/MX southbridge. |
| 170 | |
| 171 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 172 | |
| 173 | If in doubt, say N. |
| 174 | |
| 175 | config X86_P4_CLOCKMOD |
| 176 | tristate "Intel Pentium 4 clock modulation" |
| 177 | select CPU_FREQ_TABLE |
| 178 | help |
| 179 | This adds the CPUFreq driver for Intel Pentium 4 / XEON |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 180 | processors. When enabled it will lower CPU temperature by skipping |
| 181 | clocks. |
| 182 | |
| 183 | This driver should be only used in exceptional |
| 184 | circumstances when very low power is needed because it causes severe |
| 185 | slowdowns and noticeable latencies. Normally Speedstep should be used |
| 186 | instead. |
| 187 | |
| 188 | To compile this driver as a module, choose M here: the |
| 189 | module will be called p4-clockmod. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
| 191 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 192 | |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 193 | Unless you are absolutely sure say N. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
| 195 | config X86_CPUFREQ_NFORCE2 |
| 196 | tristate "nVidia nForce2 FSB changing" |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 197 | depends on X86_32 && EXPERIMENTAL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | help |
| 199 | This adds the CPUFreq driver for FSB changing on nVidia nForce2 |
| 200 | platforms. |
| 201 | |
| 202 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 203 | |
| 204 | If in doubt, say N. |
| 205 | |
| 206 | config X86_LONGRUN |
| 207 | tristate "Transmeta LongRun" |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 208 | depends on X86_32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | help |
| 210 | This adds the CPUFreq driver for Transmeta Crusoe and Efficeon processors |
| 211 | which support LongRun. |
| 212 | |
| 213 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 214 | |
| 215 | If in doubt, say N. |
| 216 | |
| 217 | config X86_LONGHAUL |
| 218 | tristate "VIA Cyrix III Longhaul" |
| 219 | select CPU_FREQ_TABLE |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 220 | depends on X86_32 && ACPI_PROCESSOR |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | help |
Dave Jones | 388d6c5 | 2006-03-11 16:04:53 -0500 | [diff] [blame] | 222 | This adds the CPUFreq driver for VIA Samuel/CyrixIII, |
| 223 | VIA Cyrix Samuel/C3, VIA Cyrix Ezra and VIA Cyrix Ezra-T |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | processors. |
| 225 | |
| 226 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 227 | |
| 228 | If in doubt, say N. |
| 229 | |
Rafa³ Bilski | 86acd49 | 2007-02-05 19:57:25 +0100 | [diff] [blame] | 230 | config X86_E_POWERSAVER |
Harald Welte | 0fea615 | 2009-06-08 18:29:36 +0800 | [diff] [blame] | 231 | tristate "VIA C7 Enhanced PowerSaver (DANGEROUS)" |
Rafa³ Bilski | 86acd49 | 2007-02-05 19:57:25 +0100 | [diff] [blame] | 232 | select CPU_FREQ_TABLE |
Harald Welte | 0fea615 | 2009-06-08 18:29:36 +0800 | [diff] [blame] | 233 | depends on X86_32 && EXPERIMENTAL |
Rafa³ Bilski | 86acd49 | 2007-02-05 19:57:25 +0100 | [diff] [blame] | 234 | help |
Harald Welte | 0fea615 | 2009-06-08 18:29:36 +0800 | [diff] [blame] | 235 | This adds the CPUFreq driver for VIA C7 processors. However, this driver |
| 236 | does not have any safeguards to prevent operating the CPU out of spec |
| 237 | and is thus considered dangerous. Please use the regular ACPI cpufreq |
| 238 | driver, enabled by CONFIG_X86_ACPI_CPUFREQ. |
Rafa³ Bilski | 86acd49 | 2007-02-05 19:57:25 +0100 | [diff] [blame] | 239 | |
| 240 | If in doubt, say N. |
| 241 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | comment "shared options" |
| 243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | config X86_SPEEDSTEP_LIB |
| 245 | tristate |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 246 | default (X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
| 248 | config X86_SPEEDSTEP_RELAXED_CAP_CHECK |
| 249 | bool "Relaxed speedstep capability checks" |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 250 | depends on X86_32 && (X86_SPEEDSTEP_SMI || X86_SPEEDSTEP_ICH) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | help |
Dave Jones | 388d6c5 | 2006-03-11 16:04:53 -0500 | [diff] [blame] | 252 | Don't perform all checks for a speedstep capable system which would |
| 253 | normally be done. Some ancient or strange systems, though speedstep |
| 254 | capable, don't always indicate that they are speedstep capable. This |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | option lets the probing code bypass some of those checks if the |
| 256 | parameter "relaxed_check=1" is passed to the module. |
| 257 | |