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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_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
25config 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
41config 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
52config 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
62config 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
68config 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
79config 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
85config 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
95config 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
110config 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
122config 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
132config 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
145config 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
158config 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
169config 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
180config 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
190config 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
202comment "shared options"
203
204config 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
215config X86_SPEEDSTEP_LIB
216 tristate
217 default X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD
218
219config 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
229endif # CPU_FREQ
230
231endmenu