Commit | Line | Data |
---|---|---|
1da177e4 | 1 | # |
bb0a56ec | 2 | # x86 CPU Frequency scaling drivers |
1da177e4 LT |
3 | # |
4 | ||
0f1d683f NC |
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 | ||
1da177e4 LT |
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. | |
83d0515b | 26 | This driver also supports Intel Enhanced Speedstep. |
1da177e4 | 27 | |
e8ef9522 SR |
28 | To compile this driver as a module, choose M here: the |
29 | module will be called acpi-cpufreq. | |
30 | ||
1da177e4 LT |
31 | For details, take a look at <file:Documentation/cpu-freq/>. |
32 | ||
33 | If in doubt, say N. | |
34 | ||
35 | config ELAN_CPUFREQ | |
bf6fc9fd | 36 | tristate "AMD Elan SC400 and SC410" |
1da177e4 | 37 | select CPU_FREQ_TABLE |
ce9c99af | 38 | depends on MELAN |
1da177e4 LT |
39 | ---help--- |
40 | This adds the CPUFreq driver for AMD Elan SC400 and SC410 | |
41 | processors. | |
42 | ||
43 | You need to specify the processor maximum speed as boot | |
44 | parameter: elanfreq=maxspeed (in kHz) or as module | |
45 | parameter "max_freq". | |
46 | ||
47 | For details, take a look at <file:Documentation/cpu-freq/>. | |
48 | ||
49 | If in doubt, say N. | |
50 | ||
bf6fc9fd DJ |
51 | config SC520_CPUFREQ |
52 | tristate "AMD Elan SC520" | |
53 | select CPU_FREQ_TABLE | |
ce9c99af | 54 | depends on MELAN |
bf6fc9fd DJ |
55 | ---help--- |
56 | This adds the CPUFreq driver for AMD Elan SC520 processor. | |
57 | ||
58 | For details, take a look at <file:Documentation/cpu-freq/>. | |
59 | ||
60 | If in doubt, say N. | |
61 | ||
62 | ||
1da177e4 LT |
63 | config X86_POWERNOW_K6 |
64 | tristate "AMD Mobile K6-2/K6-3 PowerNow!" | |
65 | select CPU_FREQ_TABLE | |
e8ef9522 | 66 | depends on X86_32 |
1da177e4 LT |
67 | help |
68 | This adds the CPUFreq driver for mobile AMD K6-2+ and mobile | |
69 | AMD K6-3+ processors. | |
70 | ||
71 | For details, take a look at <file:Documentation/cpu-freq/>. | |
72 | ||
73 | If in doubt, say N. | |
74 | ||
75 | config X86_POWERNOW_K7 | |
76 | tristate "AMD Mobile Athlon/Duron PowerNow!" | |
77 | select CPU_FREQ_TABLE | |
e8ef9522 | 78 | depends on X86_32 |
1da177e4 LT |
79 | help |
80 | This adds the CPUFreq driver for mobile AMD K7 mobile processors. | |
81 | ||
82 | For details, take a look at <file:Documentation/cpu-freq/>. | |
83 | ||
84 | If in doubt, say N. | |
85 | ||
86 | config X86_POWERNOW_K7_ACPI | |
87 | bool | |
88 | depends on X86_POWERNOW_K7 && ACPI_PROCESSOR | |
89 | depends on !(X86_POWERNOW_K7 = y && ACPI_PROCESSOR = m) | |
e8ef9522 | 90 | depends on X86_32 |
1da177e4 LT |
91 | default y |
92 | ||
93 | config X86_POWERNOW_K8 | |
94 | tristate "AMD Opteron/Athlon64 PowerNow!" | |
95 | select CPU_FREQ_TABLE | |
57f4fa69 | 96 | depends on ACPI && ACPI_PROCESSOR |
1da177e4 | 97 | help |
57f4fa69 | 98 | This adds the CPUFreq driver for K8/K10 Opteron/Athlon64 processors. |
1da177e4 | 99 | |
e8ef9522 SR |
100 | To compile this driver as a module, choose M here: the |
101 | module will be called powernow-k8. | |
102 | ||
1da177e4 LT |
103 | For details, take a look at <file:Documentation/cpu-freq/>. |
104 | ||
1da177e4 LT |
105 | config X86_GX_SUSPMOD |
106 | tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation" | |
e8ef9522 | 107 | depends on X86_32 && PCI |
1da177e4 LT |
108 | help |
109 | This add the CPUFreq driver for NatSemi Geode processors which | |
110 | support suspend modulation. | |
111 | ||
112 | For details, take a look at <file:Documentation/cpu-freq/>. | |
113 | ||
114 | If in doubt, say N. | |
115 | ||
116 | config X86_SPEEDSTEP_CENTRINO | |
e8ef9522 | 117 | tristate "Intel Enhanced SpeedStep (deprecated)" |
1da177e4 | 118 | select CPU_FREQ_TABLE |
e8ef9522 SR |
119 | select X86_SPEEDSTEP_CENTRINO_TABLE if X86_32 |
120 | depends on X86_32 || (X86_64 && ACPI_PROCESSOR) | |
1da177e4 | 121 | help |
e8ef9522 SR |
122 | This is deprecated and this functionality is now merged into |
123 | acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of | |
124 | speedstep_centrino. | |
1da177e4 | 125 | This adds the CPUFreq driver for Enhanced SpeedStep enabled |
e8ef9522 SR |
126 | mobile CPUs. This means Intel Pentium M (Centrino) CPUs |
127 | or 64bit enabled Intel Xeons. | |
128 | ||
129 | To compile this driver as a module, choose M here: the | |
130 | module will be called speedstep-centrino. | |
388d6c51 | 131 | |
1da177e4 | 132 | For details, take a look at <file:Documentation/cpu-freq/>. |
388d6c51 | 133 | |
1da177e4 LT |
134 | If in doubt, say N. |
135 | ||
1da177e4 LT |
136 | config X86_SPEEDSTEP_CENTRINO_TABLE |
137 | bool "Built-in tables for Banias CPUs" | |
e8ef9522 | 138 | depends on X86_32 && X86_SPEEDSTEP_CENTRINO |
1da177e4 LT |
139 | default y |
140 | help | |
141 | Use built-in tables for Banias CPUs if ACPI encoding | |
142 | is not available. | |
143 | ||
144 | If in doubt, say N. | |
145 | ||
146 | config X86_SPEEDSTEP_ICH | |
147 | tristate "Intel Speedstep on ICH-M chipsets (ioport interface)" | |
148 | select CPU_FREQ_TABLE | |
e8ef9522 | 149 | depends on X86_32 |
1da177e4 LT |
150 | help |
151 | This adds the CPUFreq driver for certain mobile Intel Pentium III | |
152 | (Coppermine), all mobile Intel Pentium III-M (Tualatin) and all | |
388d6c51 | 153 | mobile Intel Pentium 4 P4-M on systems which have an Intel ICH2, |
1da177e4 LT |
154 | ICH3 or ICH4 southbridge. |
155 | ||
156 | For details, take a look at <file:Documentation/cpu-freq/>. | |
157 | ||
158 | If in doubt, say N. | |
159 | ||
160 | config X86_SPEEDSTEP_SMI | |
161 | tristate "Intel SpeedStep on 440BX/ZX/MX chipsets (SMI interface)" | |
162 | select CPU_FREQ_TABLE | |
e8ef9522 | 163 | depends on X86_32 && EXPERIMENTAL |
1da177e4 LT |
164 | help |
165 | This adds the CPUFreq driver for certain mobile Intel Pentium III | |
388d6c51 | 166 | (Coppermine), all mobile Intel Pentium III-M (Tualatin) |
1da177e4 LT |
167 | on systems which have an Intel 440BX/ZX/MX southbridge. |
168 | ||
169 | For details, take a look at <file:Documentation/cpu-freq/>. | |
170 | ||
171 | If in doubt, say N. | |
172 | ||
173 | config X86_P4_CLOCKMOD | |
174 | tristate "Intel Pentium 4 clock modulation" | |
175 | select CPU_FREQ_TABLE | |
176 | help | |
177 | This adds the CPUFreq driver for Intel Pentium 4 / XEON | |
e8ef9522 SR |
178 | processors. When enabled it will lower CPU temperature by skipping |
179 | clocks. | |
180 | ||
181 | This driver should be only used in exceptional | |
182 | circumstances when very low power is needed because it causes severe | |
183 | slowdowns and noticeable latencies. Normally Speedstep should be used | |
184 | instead. | |
185 | ||
186 | To compile this driver as a module, choose M here: the | |
187 | module will be called p4-clockmod. | |
1da177e4 LT |
188 | |
189 | For details, take a look at <file:Documentation/cpu-freq/>. | |
190 | ||
e8ef9522 | 191 | Unless you are absolutely sure say N. |
1da177e4 LT |
192 | |
193 | config X86_CPUFREQ_NFORCE2 | |
194 | tristate "nVidia nForce2 FSB changing" | |
e8ef9522 | 195 | depends on X86_32 && EXPERIMENTAL |
1da177e4 LT |
196 | help |
197 | This adds the CPUFreq driver for FSB changing on nVidia nForce2 | |
198 | platforms. | |
199 | ||
200 | For details, take a look at <file:Documentation/cpu-freq/>. | |
201 | ||
202 | If in doubt, say N. | |
203 | ||
204 | config X86_LONGRUN | |
205 | tristate "Transmeta LongRun" | |
e8ef9522 | 206 | depends on X86_32 |
1da177e4 LT |
207 | help |
208 | This adds the CPUFreq driver for Transmeta Crusoe and Efficeon processors | |
209 | which support LongRun. | |
210 | ||
211 | For details, take a look at <file:Documentation/cpu-freq/>. | |
212 | ||
213 | If in doubt, say N. | |
214 | ||
215 | config X86_LONGHAUL | |
216 | tristate "VIA Cyrix III Longhaul" | |
217 | select CPU_FREQ_TABLE | |
e8ef9522 | 218 | depends on X86_32 && ACPI_PROCESSOR |
1da177e4 | 219 | help |
388d6c51 DJ |
220 | This adds the CPUFreq driver for VIA Samuel/CyrixIII, |
221 | VIA Cyrix Samuel/C3, VIA Cyrix Ezra and VIA Cyrix Ezra-T | |
1da177e4 LT |
222 | processors. |
223 | ||
224 | For details, take a look at <file:Documentation/cpu-freq/>. | |
225 | ||
226 | If in doubt, say N. | |
227 |