[linux-block.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.
Commit	Line	Data
1da177e4 LT	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
0f1d683f NC	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
1da177e4 LT	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.
83d0515b	34	This driver also supports Intel Enhanced Speedstep.
1da177e4	35
e8ef9522 SR	36	To compile this driver as a module, choose M here: the
	37	module will be called acpi-cpufreq.
	38
1da177e4 LT	39	For details, take a look at <file:Documentation/cpu-freq/>.
	40
	41	If in doubt, say N.
	42
	43	config ELAN_CPUFREQ
bf6fc9fd	44	tristate "AMD Elan SC400 and SC410"
1da177e4	45	select CPU_FREQ_TABLE
290647b4	46	depends on X86_ELAN
1da177e4 LT	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
bf6fc9fd DJ	59	config SC520_CPUFREQ
	60	tristate "AMD Elan SC520"
	61	select CPU_FREQ_TABLE
290647b4	62	depends on X86_ELAN
bf6fc9fd DJ	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
1da177e4 LT	71	config X86_POWERNOW_K6
	72	tristate "AMD Mobile K6-2/K6-3 PowerNow!"
	73	select CPU_FREQ_TABLE
e8ef9522	74	depends on X86_32
1da177e4 LT	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
e8ef9522	86	depends on X86_32
1da177e4 LT	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)
e8ef9522	98	depends on X86_32
1da177e4 LT	99	default y
	100
	101	config X86_POWERNOW_K8
	102	tristate "AMD Opteron/Athlon64 PowerNow!"
	103	select CPU_FREQ_TABLE
57f4fa69	104	depends on ACPI && ACPI_PROCESSOR
1da177e4	105	help
57f4fa69	106	This adds the CPUFreq driver for K8/K10 Opteron/Athlon64 processors.
1da177e4	107
e8ef9522 SR	108	To compile this driver as a module, choose M here: the
	109	module will be called powernow-k8.
	110
1da177e4 LT	111	For details, take a look at <file:Documentation/cpu-freq/>.
1da177e4 LT	112
1da177e4 LT	113	config X86_GX_SUSPMOD
1da177e4 LT	114	tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation"
e8ef9522	115	depends on X86_32 && PCI
1da177e4 LT	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
e8ef9522	125	tristate "Intel Enhanced SpeedStep (deprecated)"
1da177e4	126	select CPU_FREQ_TABLE
e8ef9522 SR	127	select X86_SPEEDSTEP_CENTRINO_TABLE if X86_32
e8ef9522 SR	128	depends on X86_32 \|\| (X86_64 && ACPI_PROCESSOR)
1da177e4	129	help
e8ef9522 SR	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.
1da177e4	133	This adds the CPUFreq driver for Enhanced SpeedStep enabled
e8ef9522 SR	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.
388d6c51	139
1da177e4	140	For details, take a look at <file:Documentation/cpu-freq/>.
388d6c51	141
1da177e4 LT	142	If in doubt, say N.
1da177e4 LT	143
1da177e4 LT	144	config X86_SPEEDSTEP_CENTRINO_TABLE
1da177e4 LT	145	bool "Built-in tables for Banias CPUs"
e8ef9522	146	depends on X86_32 && X86_SPEEDSTEP_CENTRINO
1da177e4 LT	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
e8ef9522	157	depends on X86_32
1da177e4 LT	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
388d6c51	161	mobile Intel Pentium 4 P4-M on systems which have an Intel ICH2,
1da177e4 LT	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
e8ef9522	171	depends on X86_32 && EXPERIMENTAL
1da177e4 LT	172	help
1da177e4 LT	173	This adds the CPUFreq driver for certain mobile Intel Pentium III
388d6c51	174	(Coppermine), all mobile Intel Pentium III-M (Tualatin)
1da177e4 LT	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
e8ef9522 SR	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.
1da177e4 LT	196
	197	For details, take a look at <file:Documentation/cpu-freq/>.
	198
e8ef9522	199	Unless you are absolutely sure say N.
1da177e4 LT	200
	201	config X86_CPUFREQ_NFORCE2
	202	tristate "nVidia nForce2 FSB changing"
e8ef9522	203	depends on X86_32 && EXPERIMENTAL
1da177e4 LT	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"
e8ef9522	214	depends on X86_32
1da177e4 LT	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
e8ef9522	226	depends on X86_32 && ACPI_PROCESSOR
1da177e4	227	help
388d6c51 DJ	228	This adds the CPUFreq driver for VIA Samuel/CyrixIII,
388d6c51 DJ	229	VIA Cyrix Samuel/C3, VIA Cyrix Ezra and VIA Cyrix Ezra-T
1da177e4 LT	230	processors.
	231
	232	For details, take a look at <file:Documentation/cpu-freq/>.
	233
	234	If in doubt, say N.
	235