[deliverable/linux.git] / drivers / cpufreq / Kconfig.x86

#
# x86 CPU Frequency scaling drivers
#

config X86_PCC_CPUFREQ
	tristate "Processor Clocking Control interface driver"
	depends on ACPI && ACPI_PROCESSOR
	help
	  This driver adds support for the PCC interface.

	  For details, take a look at:
	  <file:Documentation/cpu-freq/pcc-cpufreq.txt>.

	  To compile this driver as a module, choose M here: the
	  module will be called pcc-cpufreq.

	  If in doubt, say N.

config X86_ACPI_CPUFREQ
	tristate "ACPI Processor P-States driver"
	select CPU_FREQ_TABLE
	depends on ACPI_PROCESSOR
	help
	  This driver adds a CPUFreq driver which utilizes the ACPI
	  Processor Performance States.
	  This driver also supports Intel Enhanced Speedstep.

	  To compile this driver as a module, choose M here: the
	  module will be called acpi-cpufreq.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config ELAN_CPUFREQ
	tristate "AMD Elan SC400 and SC410"
	select CPU_FREQ_TABLE
	depends on MELAN
	---help---
	  This adds the CPUFreq driver for AMD Elan SC400 and SC410
	  processors.

	  You need to specify the processor maximum speed as boot
	  parameter: elanfreq=maxspeed (in kHz) or as module
	  parameter "max_freq".

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config SC520_CPUFREQ
	tristate "AMD Elan SC520"
	select CPU_FREQ_TABLE
	depends on MELAN
	---help---
	  This adds the CPUFreq driver for AMD Elan SC520 processor.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.


config X86_POWERNOW_K6
	tristate "AMD Mobile K6-2/K6-3 PowerNow!"
	select CPU_FREQ_TABLE
	depends on X86_32
	help
	  This adds the CPUFreq driver for mobile AMD K6-2+ and mobile
	  AMD K6-3+ processors.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config X86_POWERNOW_K7
	tristate "AMD Mobile Athlon/Duron PowerNow!"
	select CPU_FREQ_TABLE
	depends on X86_32
	help
	  This adds the CPUFreq driver for mobile AMD K7 mobile processors.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config X86_POWERNOW_K7_ACPI
	bool
	depends on X86_POWERNOW_K7 && ACPI_PROCESSOR
	depends on !(X86_POWERNOW_K7 = y && ACPI_PROCESSOR = m)
	depends on X86_32
	default y

config X86_POWERNOW_K8
	tristate "AMD Opteron/Athlon64 PowerNow!"
	select CPU_FREQ_TABLE
	depends on ACPI && ACPI_PROCESSOR
	help
	  This adds the CPUFreq driver for K8/K10 Opteron/Athlon64 processors.

	  To compile this driver as a module, choose M here: the
	  module will be called powernow-k8.

	  For details, take a look at <file:Documentation/cpu-freq/>.

config X86_GX_SUSPMOD
	tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation"
	depends on X86_32 && PCI
	help
	 This add the CPUFreq driver for NatSemi Geode processors which
	 support suspend modulation.

	 For details, take a look at <file:Documentation/cpu-freq/>.

	 If in doubt, say N.

config X86_SPEEDSTEP_CENTRINO
	tristate "Intel Enhanced SpeedStep (deprecated)"
	select CPU_FREQ_TABLE
	select X86_SPEEDSTEP_CENTRINO_TABLE if X86_32
	depends on X86_32 || (X86_64 && ACPI_PROCESSOR)
	help
	  This is deprecated and this functionality is now merged into
	  acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of
	  speedstep_centrino.
	  This adds the CPUFreq driver for Enhanced SpeedStep enabled
	  mobile CPUs.  This means Intel Pentium M (Centrino) CPUs
	  or 64bit enabled Intel Xeons.

	  To compile this driver as a module, choose M here: the
	  module will be called speedstep-centrino.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config X86_SPEEDSTEP_CENTRINO_TABLE
	bool "Built-in tables for Banias CPUs"
	depends on X86_32 && X86_SPEEDSTEP_CENTRINO
	default y
	help
	  Use built-in tables for Banias CPUs if ACPI encoding
	  is not available.

	  If in doubt, say N.

config X86_SPEEDSTEP_ICH
	tristate "Intel Speedstep on ICH-M chipsets (ioport interface)"
	select CPU_FREQ_TABLE
	depends on X86_32
	help
	  This adds the CPUFreq driver for certain mobile Intel Pentium III
	  (Coppermine), all mobile Intel Pentium III-M (Tualatin) and all
	  mobile Intel Pentium 4 P4-M on systems which have an Intel ICH2,
	  ICH3 or ICH4 southbridge.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config X86_SPEEDSTEP_SMI
	tristate "Intel SpeedStep on 440BX/ZX/MX chipsets (SMI interface)"
	select CPU_FREQ_TABLE
	depends on X86_32 && EXPERIMENTAL
	help
	  This adds the CPUFreq driver for certain mobile Intel Pentium III
	  (Coppermine), all mobile Intel Pentium III-M (Tualatin)
	  on systems which have an Intel 440BX/ZX/MX southbridge.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config X86_P4_CLOCKMOD
	tristate "Intel Pentium 4 clock modulation"
	select CPU_FREQ_TABLE
	help
	  This adds the CPUFreq driver for Intel Pentium 4 / XEON
	  processors.  When enabled it will lower CPU temperature by skipping
	  clocks.

	  This driver should be only used in exceptional
	  circumstances when very low power is needed because it causes severe
	  slowdowns and noticeable latencies.  Normally Speedstep should be used
	  instead.

	  To compile this driver as a module, choose M here: the
	  module will be called p4-clockmod.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  Unless you are absolutely sure say N.

config X86_CPUFREQ_NFORCE2
	tristate "nVidia nForce2 FSB changing"
	depends on X86_32 && EXPERIMENTAL
	help
	  This adds the CPUFreq driver for FSB changing on nVidia nForce2
	  platforms.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config X86_LONGRUN
	tristate "Transmeta LongRun"
	depends on X86_32
	help
	  This adds the CPUFreq driver for Transmeta Crusoe and Efficeon processors
	  which support LongRun.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config X86_LONGHAUL
	tristate "VIA Cyrix III Longhaul"
	select CPU_FREQ_TABLE
	depends on X86_32 && ACPI_PROCESSOR
	help
	  This adds the CPUFreq driver for VIA Samuel/CyrixIII,
	  VIA Cyrix Samuel/C3, VIA Cyrix Ezra and VIA Cyrix Ezra-T
	  processors.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.
Commit	Line	Data
1da177e4	1	#
bb0a56ec	2	# x86 CPU Frequency scaling drivers
1da177e4 LT	3	#
1da177e4 LT	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/>.
1da177e4 LT	104
1da177e4 LT	105	config X86_GX_SUSPMOD
1da177e4 LT	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
e8ef9522 SR	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.
1da177e4 LT	135
1da177e4 LT	136	config X86_SPEEDSTEP_CENTRINO_TABLE
1da177e4 LT	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
1da177e4 LT	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,
388d6c51 DJ	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