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diff --git a/arch/x86/kernel/cpu/cpufreq/Kconfig b/arch/x86/kernel/cpu/cpufreq/Kconfig
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1#
2# CPU Frequency scaling
3#
4
5menu "CPU Frequency scaling"
6
7source "drivers/cpufreq/Kconfig"
8
9if CPU_FREQ
10
11comment "CPUFreq processor drivers"
12
13config X86_PCC_CPUFREQ
14 tristate "Processor Clocking Control interface driver"
15 depends on ACPI && ACPI_PROCESSOR
16 help
17 This driver adds support for the PCC interface.
18
19 For details, take a look at:
20 <file:Documentation/cpu-freq/pcc-cpufreq.txt>.
21
22 To compile this driver as a module, choose M here: the
23 module will be called pcc-cpufreq.
24
25 If in doubt, say N.
26
27config X86_ACPI_CPUFREQ
28 tristate "ACPI Processor P-States driver"
29 select CPU_FREQ_TABLE
30 depends on ACPI_PROCESSOR
31 help
32 This driver adds a CPUFreq driver which utilizes the ACPI
33 Processor Performance States.
34 This driver also supports Intel Enhanced Speedstep.
35
36 To compile this driver as a module, choose M here: the
37 module will be called acpi-cpufreq.
38
39 For details, take a look at <file:Documentation/cpu-freq/>.
40
41 If in doubt, say N.
42
43config ELAN_CPUFREQ
44 tristate "AMD Elan SC400 and SC410"
45 select CPU_FREQ_TABLE
46 depends on X86_ELAN
47 ---help---
48 This adds the CPUFreq driver for AMD Elan SC400 and SC410
49 processors.
50
51 You need to specify the processor maximum speed as boot
52 parameter: elanfreq=maxspeed (in kHz) or as module
53 parameter "max_freq".
54
55 For details, take a look at <file:Documentation/cpu-freq/>.
56
57 If in doubt, say N.
58
59config SC520_CPUFREQ
60 tristate "AMD Elan SC520"
61 select CPU_FREQ_TABLE
62 depends on X86_ELAN
63 ---help---
64 This adds the CPUFreq driver for AMD Elan SC520 processor.
65
66 For details, take a look at <file:Documentation/cpu-freq/>.
67
68 If in doubt, say N.
69
70
71config X86_POWERNOW_K6
72 tristate "AMD Mobile K6-2/K6-3 PowerNow!"
73 select CPU_FREQ_TABLE
74 depends on X86_32
75 help
76 This adds the CPUFreq driver for mobile AMD K6-2+ and mobile
77 AMD K6-3+ processors.
78
79 For details, take a look at <file:Documentation/cpu-freq/>.
80
81 If in doubt, say N.
82
83config X86_POWERNOW_K7
84 tristate "AMD Mobile Athlon/Duron PowerNow!"
85 select CPU_FREQ_TABLE
86 depends on X86_32
87 help
88 This adds the CPUFreq driver for mobile AMD K7 mobile processors.
89
90 For details, take a look at <file:Documentation/cpu-freq/>.
91
92 If in doubt, say N.
93
94config X86_POWERNOW_K7_ACPI
95 bool
96 depends on X86_POWERNOW_K7 && ACPI_PROCESSOR
97 depends on !(X86_POWERNOW_K7 = y && ACPI_PROCESSOR = m)
98 depends on X86_32
99 default y
100
101config X86_POWERNOW_K8
102 tristate "AMD Opteron/Athlon64 PowerNow!"
103 select CPU_FREQ_TABLE
104 depends on ACPI && ACPI_PROCESSOR
105 help
106 This adds the CPUFreq driver for K8/K10 Opteron/Athlon64 processors.
107
108 To compile this driver as a module, choose M here: the
109 module will be called powernow-k8.
110
111 For details, take a look at <file:Documentation/cpu-freq/>.
112
113config X86_GX_SUSPMOD
114 tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation"
115 depends on X86_32 && PCI
116 help
117 This add the CPUFreq driver for NatSemi Geode processors which
118 support suspend modulation.
119
120 For details, take a look at <file:Documentation/cpu-freq/>.
121
122 If in doubt, say N.
123
124config X86_SPEEDSTEP_CENTRINO
125 tristate "Intel Enhanced SpeedStep (deprecated)"
126 select CPU_FREQ_TABLE
127 select X86_SPEEDSTEP_CENTRINO_TABLE if X86_32
128 depends on X86_32 || (X86_64 && ACPI_PROCESSOR)
129 help
130 This is deprecated and this functionality is now merged into
131 acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of
132 speedstep_centrino.
133 This adds the CPUFreq driver for Enhanced SpeedStep enabled
134 mobile CPUs. This means Intel Pentium M (Centrino) CPUs
135 or 64bit enabled Intel Xeons.
136
137 To compile this driver as a module, choose M here: the
138 module will be called speedstep-centrino.
139
140 For details, take a look at <file:Documentation/cpu-freq/>.
141
142 If in doubt, say N.
143
144config X86_SPEEDSTEP_CENTRINO_TABLE
145 bool "Built-in tables for Banias CPUs"
146 depends on X86_32 && X86_SPEEDSTEP_CENTRINO
147 default y
148 help
149 Use built-in tables for Banias CPUs if ACPI encoding
150 is not available.
151
152 If in doubt, say N.
153
154config X86_SPEEDSTEP_ICH
155 tristate "Intel Speedstep on ICH-M chipsets (ioport interface)"
156 select CPU_FREQ_TABLE
157 depends on X86_32
158 help
159 This adds the CPUFreq driver for certain mobile Intel Pentium III
160 (Coppermine), all mobile Intel Pentium III-M (Tualatin) and all
161 mobile Intel Pentium 4 P4-M on systems which have an Intel ICH2,
162 ICH3 or ICH4 southbridge.
163
164 For details, take a look at <file:Documentation/cpu-freq/>.
165
166 If in doubt, say N.
167
168config X86_SPEEDSTEP_SMI
169 tristate "Intel SpeedStep on 440BX/ZX/MX chipsets (SMI interface)"
170 select CPU_FREQ_TABLE
171 depends on X86_32 && EXPERIMENTAL
172 help
173 This adds the CPUFreq driver for certain mobile Intel Pentium III
174 (Coppermine), all mobile Intel Pentium III-M (Tualatin)
175 on systems which have an Intel 440BX/ZX/MX southbridge.
176
177 For details, take a look at <file:Documentation/cpu-freq/>.
178
179 If in doubt, say N.
180
181config X86_P4_CLOCKMOD
182 tristate "Intel Pentium 4 clock modulation"
183 select CPU_FREQ_TABLE
184 help
185 This adds the CPUFreq driver for Intel Pentium 4 / XEON
186 processors. When enabled it will lower CPU temperature by skipping
187 clocks.
188
189 This driver should be only used in exceptional
190 circumstances when very low power is needed because it causes severe
191 slowdowns and noticeable latencies. Normally Speedstep should be used
192 instead.
193
194 To compile this driver as a module, choose M here: the
195 module will be called p4-clockmod.
196
197 For details, take a look at <file:Documentation/cpu-freq/>.
198
199 Unless you are absolutely sure say N.
200
201config X86_CPUFREQ_NFORCE2
202 tristate "nVidia nForce2 FSB changing"
203 depends on X86_32 && EXPERIMENTAL
204 help
205 This adds the CPUFreq driver for FSB changing on nVidia nForce2
206 platforms.
207
208 For details, take a look at <file:Documentation/cpu-freq/>.
209
210 If in doubt, say N.
211
212config X86_LONGRUN
213 tristate "Transmeta LongRun"
214 depends on X86_32
215 help
216 This adds the CPUFreq driver for Transmeta Crusoe and Efficeon processors
217 which support LongRun.
218
219 For details, take a look at <file:Documentation/cpu-freq/>.
220
221 If in doubt, say N.
222
223config X86_LONGHAUL
224 tristate "VIA Cyrix III Longhaul"
225 select CPU_FREQ_TABLE
226 depends on X86_32 && ACPI_PROCESSOR
227 help
228 This adds the CPUFreq driver for VIA Samuel/CyrixIII,
229 VIA Cyrix Samuel/C3, VIA Cyrix Ezra and VIA Cyrix Ezra-T
230 processors.
231
232 For details, take a look at <file:Documentation/cpu-freq/>.
233
234 If in doubt, say N.
235
236config X86_E_POWERSAVER
237 tristate "VIA C7 Enhanced PowerSaver (DANGEROUS)"
238 select CPU_FREQ_TABLE
239 depends on X86_32 && EXPERIMENTAL
240 help
241 This adds the CPUFreq driver for VIA C7 processors. However, this driver
242 does not have any safeguards to prevent operating the CPU out of spec
243 and is thus considered dangerous. Please use the regular ACPI cpufreq
244 driver, enabled by CONFIG_X86_ACPI_CPUFREQ.
245
246 If in doubt, say N.
247
248comment "shared options"
249
250config X86_SPEEDSTEP_LIB
251 tristate
252 default (X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD)
253
254config X86_SPEEDSTEP_RELAXED_CAP_CHECK
255 bool "Relaxed speedstep capability checks"
256 depends on X86_32 && (X86_SPEEDSTEP_SMI || X86_SPEEDSTEP_ICH)
257 help
258 Don't perform all checks for a speedstep capable system which would
259 normally be done. Some ancient or strange systems, though speedstep
260 capable, don't always indicate that they are speedstep capable. This
261 option lets the probing code bypass some of those checks if the
262 parameter "relaxed_check=1" is passed to the module.
263
264endif # CPU_FREQ
265
266endmenu
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