[deliverable/linux.git] / arch / x86 / kernel / cpu / cpufreq / Kconfig

#
# CPU Frequency scaling
#

menu "CPU Frequency scaling"

source "drivers/cpufreq/Kconfig"

if CPU_FREQ

comment "CPUFreq processor 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 X86_ELAN
	---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 X86_ELAN
	---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.

config X86_E_POWERSAVER
	tristate "VIA C7 Enhanced PowerSaver (DANGEROUS)"
	select CPU_FREQ_TABLE
	depends on X86_32 && EXPERIMENTAL
	help
	  This adds the CPUFreq driver for VIA C7 processors.  However, this driver
	  does not have any safeguards to prevent operating the CPU out of spec
	  and is thus considered dangerous.  Please use the regular ACPI cpufreq
	  driver, enabled by CONFIG_X86_ACPI_CPUFREQ.

	  If in doubt, say N.

comment "shared options"

config X86_SPEEDSTEP_LIB
	tristate
	default (X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD)

config X86_SPEEDSTEP_RELAXED_CAP_CHECK
	bool "Relaxed speedstep capability checks"
	depends on X86_32 && (X86_SPEEDSTEP_SMI || X86_SPEEDSTEP_ICH)
	help
	  Don't perform all checks for a speedstep capable system which would
	  normally be done. Some ancient or strange systems, though speedstep
	  capable, don't always indicate that they are speedstep capable. This
	  option lets the probing code bypass some of those checks if the
	  parameter "relaxed_check=1" is passed to the module.

endif	# CPU_FREQ

endmenu
Commit	Line	Data
	1	#
	2	# CPU Frequency scaling
	3	#
	4
	5	menu "CPU Frequency scaling"
	6
	7	source "drivers/cpufreq/Kconfig"
	8
	9	if CPU_FREQ
	10
	11	comment "CPUFreq processor drivers"
	12
	13	config 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
	27	config 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
	43	config 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
	59	config 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
	71	config 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
	83	config 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
	94	config 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
	101	config 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
	113	config 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
	124	config 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
	144	config 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
	154	config 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
	168	config 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
	181	config 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
	201	config 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
	212	config 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
	223	config 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
	236	config 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
	248	comment "shared options"
	249
	250	config X86_SPEEDSTEP_LIB
	251	tristate
	252	default (X86_SPEEDSTEP_ICH \|\| X86_SPEEDSTEP_SMI \|\| X86_P4_CLOCKMOD)
	253
	254	config 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
	264	endif # CPU_FREQ
	265
	266	endmenu