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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#
Dave Jonesbb0a56e2011-05-19 18:51:07 -04002# x86 CPU Frequency scaling drivers
Linus Torvalds1da177e2005-04-16 15:20:36 -07003#
4
Naga Chumbalkar0f1d6832009-12-17 20:18:27 +00005config 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 Torvalds1da177e2005-04-16 15:20:36 -070019config 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 Garrett3dc9a632012-09-04 08:28:02 +000026 This driver also supports Intel Enhanced Speedstep and newer
27 AMD CPUs.
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
Sam Ravnborge8ef9522007-11-06 19:35:19 +010029 To compile this driver as a module, choose M here: the
30 module will be called acpi-cpufreq.
31
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 For details, take a look at <file:Documentation/cpu-freq/>.
33
34 If in doubt, say N.
35
Andre Przywara11269ff2012-09-04 08:28:08 +000036config X86_ACPI_CPUFREQ_CPB
37 default y
38 bool "Legacy cpb sysfs knob support for AMD CPUs"
39 depends on X86_ACPI_CPUFREQ && CPU_SUP_AMD
40 help
41 The powernow-k8 driver used to provide a sysfs knob called "cpb"
42 to disable the Core Performance Boosting feature of AMD CPUs. This
43 file has now been superseeded by the more generic "boost" entry.
44
45 By enabling this option the acpi_cpufreq driver provides the old
46 entry in addition to the new boost ones, for compatibility reasons.
47
Linus Torvalds1da177e2005-04-16 15:20:36 -070048config ELAN_CPUFREQ
Dave Jonesbf6fc9f2005-05-31 19:03:45 -070049 tristate "AMD Elan SC400 and SC410"
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 select CPU_FREQ_TABLE
Ian Campbellce9c99a2011-04-08 07:42:29 +010051 depends on MELAN
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 ---help---
53 This adds the CPUFreq driver for AMD Elan SC400 and SC410
54 processors.
55
56 You need to specify the processor maximum speed as boot
57 parameter: elanfreq=maxspeed (in kHz) or as module
58 parameter "max_freq".
59
60 For details, take a look at <file:Documentation/cpu-freq/>.
61
62 If in doubt, say N.
63
Dave Jonesbf6fc9f2005-05-31 19:03:45 -070064config SC520_CPUFREQ
65 tristate "AMD Elan SC520"
66 select CPU_FREQ_TABLE
Ian Campbellce9c99a2011-04-08 07:42:29 +010067 depends on MELAN
Dave Jonesbf6fc9f2005-05-31 19:03:45 -070068 ---help---
69 This adds the CPUFreq driver for AMD Elan SC520 processor.
70
71 For details, take a look at <file:Documentation/cpu-freq/>.
72
73 If in doubt, say N.
74
75
Linus Torvalds1da177e2005-04-16 15:20:36 -070076config X86_POWERNOW_K6
77 tristate "AMD Mobile K6-2/K6-3 PowerNow!"
78 select CPU_FREQ_TABLE
Sam Ravnborge8ef9522007-11-06 19:35:19 +010079 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 help
81 This adds the CPUFreq driver for mobile AMD K6-2+ and mobile
82 AMD K6-3+ processors.
83
84 For details, take a look at <file:Documentation/cpu-freq/>.
85
86 If in doubt, say N.
87
88config X86_POWERNOW_K7
89 tristate "AMD Mobile Athlon/Duron PowerNow!"
90 select CPU_FREQ_TABLE
Sam Ravnborge8ef9522007-11-06 19:35:19 +010091 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 help
93 This adds the CPUFreq driver for mobile AMD K7 mobile processors.
94
95 For details, take a look at <file:Documentation/cpu-freq/>.
96
97 If in doubt, say N.
98
99config X86_POWERNOW_K7_ACPI
100 bool
101 depends on X86_POWERNOW_K7 && ACPI_PROCESSOR
102 depends on !(X86_POWERNOW_K7 = y && ACPI_PROCESSOR = m)
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100103 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 default y
105
106config X86_POWERNOW_K8
107 tristate "AMD Opteron/Athlon64 PowerNow!"
108 select CPU_FREQ_TABLE
Thomas Renninger57f4fa62009-02-04 01:17:45 +0100109 depends on ACPI && ACPI_PROCESSOR
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 help
Andre Przywara034be8f2012-09-04 08:28:04 +0000111 This adds the CPUFreq driver for K8/early Opteron/Athlon64 processors.
112 Support for K10 and newer processors is now in acpi-cpufreq.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100114 To compile this driver as a module, choose M here: the
115 module will be called powernow-k8.
116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 For details, take a look at <file:Documentation/cpu-freq/>.
118
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119config X86_GX_SUSPMOD
120 tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100121 depends on X86_32 && PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 help
123 This add the CPUFreq driver for NatSemi Geode processors which
124 support suspend modulation.
125
126 For details, take a look at <file:Documentation/cpu-freq/>.
127
128 If in doubt, say N.
129
130config X86_SPEEDSTEP_CENTRINO
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100131 tristate "Intel Enhanced SpeedStep (deprecated)"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 select CPU_FREQ_TABLE
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100133 select X86_SPEEDSTEP_CENTRINO_TABLE if X86_32
134 depends on X86_32 || (X86_64 && ACPI_PROCESSOR)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 help
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100136 This is deprecated and this functionality is now merged into
137 acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of
138 speedstep_centrino.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 This adds the CPUFreq driver for Enhanced SpeedStep enabled
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100140 mobile CPUs. This means Intel Pentium M (Centrino) CPUs
141 or 64bit enabled Intel Xeons.
142
143 To compile this driver as a module, choose M here: the
144 module will be called speedstep-centrino.
Dave Jones388d6c52006-03-11 16:04:53 -0500145
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 For details, take a look at <file:Documentation/cpu-freq/>.
Dave Jones388d6c52006-03-11 16:04:53 -0500147
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 If in doubt, say N.
149
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150config X86_SPEEDSTEP_CENTRINO_TABLE
151 bool "Built-in tables for Banias CPUs"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100152 depends on X86_32 && X86_SPEEDSTEP_CENTRINO
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 default y
154 help
155 Use built-in tables for Banias CPUs if ACPI encoding
156 is not available.
157
158 If in doubt, say N.
159
160config X86_SPEEDSTEP_ICH
161 tristate "Intel Speedstep on ICH-M chipsets (ioport interface)"
162 select CPU_FREQ_TABLE
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100163 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 help
165 This adds the CPUFreq driver for certain mobile Intel Pentium III
166 (Coppermine), all mobile Intel Pentium III-M (Tualatin) and all
Dave Jones388d6c52006-03-11 16:04:53 -0500167 mobile Intel Pentium 4 P4-M on systems which have an Intel ICH2,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 ICH3 or ICH4 southbridge.
169
170 For details, take a look at <file:Documentation/cpu-freq/>.
171
172 If in doubt, say N.
173
174config X86_SPEEDSTEP_SMI
175 tristate "Intel SpeedStep on 440BX/ZX/MX chipsets (SMI interface)"
176 select CPU_FREQ_TABLE
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100177 depends on X86_32 && EXPERIMENTAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 help
179 This adds the CPUFreq driver for certain mobile Intel Pentium III
Dave Jones388d6c52006-03-11 16:04:53 -0500180 (Coppermine), all mobile Intel Pentium III-M (Tualatin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 on systems which have an Intel 440BX/ZX/MX southbridge.
182
183 For details, take a look at <file:Documentation/cpu-freq/>.
184
185 If in doubt, say N.
186
187config X86_P4_CLOCKMOD
188 tristate "Intel Pentium 4 clock modulation"
189 select CPU_FREQ_TABLE
190 help
191 This adds the CPUFreq driver for Intel Pentium 4 / XEON
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100192 processors. When enabled it will lower CPU temperature by skipping
193 clocks.
194
195 This driver should be only used in exceptional
196 circumstances when very low power is needed because it causes severe
197 slowdowns and noticeable latencies. Normally Speedstep should be used
198 instead.
199
200 To compile this driver as a module, choose M here: the
201 module will be called p4-clockmod.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
203 For details, take a look at <file:Documentation/cpu-freq/>.
204
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100205 Unless you are absolutely sure say N.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
207config X86_CPUFREQ_NFORCE2
208 tristate "nVidia nForce2 FSB changing"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100209 depends on X86_32 && EXPERIMENTAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 help
211 This adds the CPUFreq driver for FSB changing on nVidia nForce2
212 platforms.
213
214 For details, take a look at <file:Documentation/cpu-freq/>.
215
216 If in doubt, say N.
217
218config X86_LONGRUN
219 tristate "Transmeta LongRun"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100220 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 help
222 This adds the CPUFreq driver for Transmeta Crusoe and Efficeon processors
223 which support LongRun.
224
225 For details, take a look at <file:Documentation/cpu-freq/>.
226
227 If in doubt, say N.
228
229config X86_LONGHAUL
230 tristate "VIA Cyrix III Longhaul"
231 select CPU_FREQ_TABLE
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100232 depends on X86_32 && ACPI_PROCESSOR
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 help
Dave Jones388d6c52006-03-11 16:04:53 -0500234 This adds the CPUFreq driver for VIA Samuel/CyrixIII,
235 VIA Cyrix Samuel/C3, VIA Cyrix Ezra and VIA Cyrix Ezra-T
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 processors.
237
238 For details, take a look at <file:Documentation/cpu-freq/>.
239
240 If in doubt, say N.
241
Rafa³ Bilski86acd492007-02-05 19:57:25 +0100242config X86_E_POWERSAVER
Harald Welte0fea6152009-06-08 18:29:36 +0800243 tristate "VIA C7 Enhanced PowerSaver (DANGEROUS)"
Rafa³ Bilski86acd492007-02-05 19:57:25 +0100244 select CPU_FREQ_TABLE
Harald Welte0fea6152009-06-08 18:29:36 +0800245 depends on X86_32 && EXPERIMENTAL
Rafa³ Bilski86acd492007-02-05 19:57:25 +0100246 help
Harald Welte0fea6152009-06-08 18:29:36 +0800247 This adds the CPUFreq driver for VIA C7 processors. However, this driver
248 does not have any safeguards to prevent operating the CPU out of spec
249 and is thus considered dangerous. Please use the regular ACPI cpufreq
250 driver, enabled by CONFIG_X86_ACPI_CPUFREQ.
Rafa³ Bilski86acd492007-02-05 19:57:25 +0100251
252 If in doubt, say N.
253
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254comment "shared options"
255
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256config X86_SPEEDSTEP_LIB
257 tristate
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100258 default (X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
260config X86_SPEEDSTEP_RELAXED_CAP_CHECK
261 bool "Relaxed speedstep capability checks"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100262 depends on X86_32 && (X86_SPEEDSTEP_SMI || X86_SPEEDSTEP_ICH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 help
Dave Jones388d6c52006-03-11 16:04:53 -0500264 Don't perform all checks for a speedstep capable system which would
265 normally be done. Some ancient or strange systems, though speedstep
266 capable, don't always indicate that they are speedstep capable. This
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 option lets the probing code bypass some of those checks if the
268 parameter "relaxed_check=1" is passed to the module.
269