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

menu "CPU Frequency scaling"

config CPU_FREQ
	bool "CPU Frequency scaling"
	select SRCU
	help
	  CPU Frequency scaling allows you to change the clock speed of 
	  CPUs on the fly. This is a nice method to save power, because 
	  the lower the CPU clock speed, the less power the CPU consumes.

	  Note that this driver doesn't automatically change the CPU
	  clock speed, you need to either enable a dynamic cpufreq governor
	  (see below) after boot, or use a userspace tool.

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

	  If in doubt, say N.

if CPU_FREQ

config CPU_FREQ_GOV_ATTR_SET
	bool

config CPU_FREQ_GOV_COMMON
	select CPU_FREQ_GOV_ATTR_SET
	select IRQ_WORK
	bool

config CPU_FREQ_BOOST_SW
	bool
	depends on THERMAL

config CPU_FREQ_STAT
	bool "CPU frequency transition statistics"
	default y
	help
	  Export CPU frequency statistics information through sysfs.

	  If in doubt, say N.

config CPU_FREQ_STAT_DETAILS
	bool "CPU frequency transition statistics details"
	depends on CPU_FREQ_STAT
	help
	  Show detailed CPU frequency transition table in sysfs.

	  If in doubt, say N.

choice
	prompt "Default CPUFreq governor"
	default CPU_FREQ_DEFAULT_GOV_USERSPACE if ARM_SA1100_CPUFREQ || ARM_SA1110_CPUFREQ
	default CPU_FREQ_DEFAULT_GOV_PERFORMANCE
	help
	  This option sets which CPUFreq governor shall be loaded at
	  startup. If in doubt, select 'performance'.

config CPU_FREQ_DEFAULT_GOV_PERFORMANCE
	bool "performance"
	select CPU_FREQ_GOV_PERFORMANCE
	help
	  Use the CPUFreq governor 'performance' as default. This sets
	  the frequency statically to the highest frequency supported by
	  the CPU.

config CPU_FREQ_DEFAULT_GOV_POWERSAVE
	bool "powersave"
	select CPU_FREQ_GOV_POWERSAVE
	help
	  Use the CPUFreq governor 'powersave' as default. This sets
	  the frequency statically to the lowest frequency supported by
	  the CPU.

config CPU_FREQ_DEFAULT_GOV_USERSPACE
	bool "userspace"
	select CPU_FREQ_GOV_USERSPACE
	help
	  Use the CPUFreq governor 'userspace' as default. This allows
	  you to set the CPU frequency manually or when a userspace 
	  program shall be able to set the CPU dynamically without having
	  to enable the userspace governor manually.

config CPU_FREQ_DEFAULT_GOV_ONDEMAND
	bool "ondemand"
	select CPU_FREQ_GOV_ONDEMAND
	select CPU_FREQ_GOV_PERFORMANCE
	help
	  Use the CPUFreq governor 'ondemand' as default. This allows
	  you to get a full dynamic frequency capable system by simply
	  loading your cpufreq low-level hardware driver.
	  Be aware that not all cpufreq drivers support the ondemand
	  governor. If unsure have a look at the help section of the
	  driver. Fallback governor will be the performance governor.

config CPU_FREQ_DEFAULT_GOV_CONSERVATIVE
	bool "conservative"
	select CPU_FREQ_GOV_CONSERVATIVE
	select CPU_FREQ_GOV_PERFORMANCE
	help
	  Use the CPUFreq governor 'conservative' as default. This allows
	  you to get a full dynamic frequency capable system by simply
	  loading your cpufreq low-level hardware driver.
	  Be aware that not all cpufreq drivers support the conservative
	  governor. If unsure have a look at the help section of the
	  driver. Fallback governor will be the performance governor.

config CPU_FREQ_DEFAULT_GOV_SCHEDUTIL
	bool "schedutil"
	depends on SMP
	select CPU_FREQ_GOV_SCHEDUTIL
	select CPU_FREQ_GOV_PERFORMANCE
	help
	  Use the 'schedutil' CPUFreq governor by default. If unsure,
	  have a look at the help section of that governor. The fallback
	  governor will be 'performance'.

endchoice

config CPU_FREQ_GOV_PERFORMANCE
	tristate "'performance' governor"
	help
	  This cpufreq governor sets the frequency statically to the
	  highest available CPU frequency.

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

	  If in doubt, say Y.

config CPU_FREQ_GOV_POWERSAVE
	tristate "'powersave' governor"
	help
	  This cpufreq governor sets the frequency statically to the
	  lowest available CPU frequency.

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

	  If in doubt, say Y.

config CPU_FREQ_GOV_USERSPACE
	tristate "'userspace' governor for userspace frequency scaling"
	help
	  Enable this cpufreq governor when you either want to set the
	  CPU frequency manually or when a userspace program shall
	  be able to set the CPU dynamically, like on LART 
	  <http://www.lartmaker.nl/>.

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

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

	  If in doubt, say Y.

config CPU_FREQ_GOV_ONDEMAND
	tristate "'ondemand' cpufreq policy governor"
	select CPU_FREQ_GOV_COMMON
	help
	  'ondemand' - This driver adds a dynamic cpufreq policy governor.
	  The governor does a periodic polling and 
	  changes frequency based on the CPU utilization.
	  The support for this governor depends on CPU capability to
	  do fast frequency switching (i.e, very low latency frequency
	  transitions). 

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

	  For details, take a look at linux/Documentation/cpu-freq.

	  If in doubt, say N.

config CPU_FREQ_GOV_CONSERVATIVE
	tristate "'conservative' cpufreq governor"
	depends on CPU_FREQ
	select CPU_FREQ_GOV_COMMON
	help
	  'conservative' - this driver is rather similar to the 'ondemand'
	  governor both in its source code and its purpose, the difference is
	  its optimisation for better suitability in a battery powered
	  environment.  The frequency is gracefully increased and decreased
	  rather than jumping to 100% when speed is required.

	  If you have a desktop machine then you should really be considering
	  the 'ondemand' governor instead, however if you are using a laptop,
	  PDA or even an AMD64 based computer (due to the unacceptable
	  step-by-step latency issues between the minimum and maximum frequency
	  transitions in the CPU) you will probably want to use this governor.

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

	  For details, take a look at linux/Documentation/cpu-freq.

	  If in doubt, say N.

config CPU_FREQ_GOV_SCHEDUTIL
	tristate "'schedutil' cpufreq policy governor"
	depends on CPU_FREQ && SMP
	select CPU_FREQ_GOV_ATTR_SET
	select IRQ_WORK
	help
	  This governor makes decisions based on the utilization data provided
	  by the scheduler.  It sets the CPU frequency to be proportional to
	  the utilization/capacity ratio coming from the scheduler.  If the
	  utilization is frequency-invariant, the new frequency is also
	  proportional to the maximum available frequency.  If that is not the
	  case, it is proportional to the current frequency of the CPU.  The
	  frequency tipping point is at utilization/capacity equal to 80% in
	  both cases.

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

	  If in doubt, say N.

comment "CPU frequency scaling drivers"

config CPUFREQ_DT
	tristate "Generic DT based cpufreq driver"
	depends on HAVE_CLK && OF
	# if CPU_THERMAL is on and THERMAL=m, CPUFREQ_DT cannot be =y:
	depends on !CPU_THERMAL || THERMAL
	select CPUFREQ_DT_PLATDEV
	select PM_OPP
	help
	  This adds a generic DT based cpufreq driver for frequency management.
	  It supports both uniprocessor (UP) and symmetric multiprocessor (SMP)
	  systems which share clock and voltage across all CPUs.

	  If in doubt, say N.

config CPUFREQ_DT_PLATDEV
	bool
	help
	  This adds a generic DT based cpufreq platdev driver for frequency
	  management.  This creates a 'cpufreq-dt' platform device, on the
	  supported platforms.

	  If in doubt, say N.

if X86
source "drivers/cpufreq/Kconfig.x86"
endif

if ARM || ARM64
source "drivers/cpufreq/Kconfig.arm"
endif

if PPC32 || PPC64
source "drivers/cpufreq/Kconfig.powerpc"
endif

if AVR32
config AVR32_AT32AP_CPUFREQ
	bool "CPU frequency driver for AT32AP"
	depends on PLATFORM_AT32AP
	default n
	help
	  This enables the CPU frequency driver for AT32AP processors.
	  If in doubt, say N.
endif

if IA64
config IA64_ACPI_CPUFREQ
	tristate "ACPI Processor P-States driver"
	depends on ACPI_PROCESSOR
	help
	This driver adds a CPUFreq driver which utilizes the ACPI
	Processor Performance States.

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

	If in doubt, say N.
endif

if MIPS
config LOONGSON2_CPUFREQ
	tristate "Loongson2 CPUFreq Driver"
	help
	  This option adds a CPUFreq driver for loongson processors which
	  support software configurable cpu frequency.

	  Loongson2F and it's successors support this feature.

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

	  If in doubt, say N.

config LOONGSON1_CPUFREQ
	tristate "Loongson1 CPUFreq Driver"
	help
	  This option adds a CPUFreq driver for loongson1 processors which
	  support software configurable cpu frequency.

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

	  If in doubt, say N.
endif

if SPARC64
config SPARC_US3_CPUFREQ
	tristate "UltraSPARC-III CPU Frequency driver"
	help
	  This adds the CPUFreq driver for UltraSPARC-III processors.

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

	  If in doubt, say N.

config SPARC_US2E_CPUFREQ
	tristate "UltraSPARC-IIe CPU Frequency driver"
	help
	  This adds the CPUFreq driver for UltraSPARC-IIe processors.

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

	  If in doubt, say N.
endif

if SUPERH
config SH_CPU_FREQ
	tristate "SuperH CPU Frequency driver"
	help
	  This adds the cpufreq driver for SuperH. Any CPU that supports
	  clock rate rounding through the clock framework can use this
	  driver. While it will make the kernel slightly larger, this is
	  harmless for CPUs that don't support rate rounding. The driver
	  will also generate a notice in the boot log before disabling
	  itself if the CPU in question is not capable of rate rounding.

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

	  If unsure, say N.
endif

config QORIQ_CPUFREQ
	tristate "CPU frequency scaling driver for Freescale QorIQ SoCs"
	depends on OF && COMMON_CLK && (PPC_E500MC || ARM)
	depends on !CPU_THERMAL || THERMAL
	select CLK_QORIQ
	help
	  This adds the CPUFreq driver support for Freescale QorIQ SoCs
	  which are capable of changing the CPU's frequency dynamically.

endif
endmenu
Commit	Line	Data
bb0a56ec DJ	1	menu "CPU Frequency scaling"
bb0a56ec DJ	2
1da177e4 LT	3	config CPU_FREQ
1da177e4 LT	4	bool "CPU Frequency scaling"
83fe27ea	5	select SRCU
1da177e4 LT	6	help
	7	CPU Frequency scaling allows you to change the clock speed of
	8	CPUs on the fly. This is a nice method to save power, because
	9	the lower the CPU clock speed, the less power the CPU consumes.
	10
	11	Note that this driver doesn't automatically change the CPU
	12	clock speed, you need to either enable a dynamic cpufreq governor
	13	(see below) after boot, or use a userspace tool.
	14
	15	For details, take a look at <file:Documentation/cpu-freq>.
	16
	17	If in doubt, say N.
	18
	19	if CPU_FREQ
	20
2d0c58ad RW	21	config CPU_FREQ_GOV_ATTR_SET
	22	bool
	23
1e15f295	24	config CPU_FREQ_GOV_COMMON
2d0c58ad	25	select CPU_FREQ_GOV_ATTR_SET
e6f03657	26	select IRQ_WORK
1e15f295 LF	27	bool
1e15f295 LF	28
2fb4719b LM	29	config CPU_FREQ_BOOST_SW
	30	bool
	31	depends on THERMAL
	32
1da177e4	33	config CPU_FREQ_STAT
1aefc75b	34	bool "CPU frequency transition statistics"
9101be53 MF	35	default y
9101be53 MF	36	help
1aefc75b	37	Export CPU frequency statistics information through sysfs.
9101be53 MF	38
9101be53 MF	39	If in doubt, say N.
1da177e4 LT	40
1da177e4 LT	41	config CPU_FREQ_STAT_DETAILS
1aefc75b	42	bool "CPU frequency transition statistics details"
9101be53 MF	43	depends on CPU_FREQ_STAT
9101be53 MF	44	help
1aefc75b	45	Show detailed CPU frequency transition table in sysfs.
9101be53 MF	46
9101be53 MF	47	If in doubt, say N.
1da177e4 LT	48
	49	choice
	50	prompt "Default CPUFreq governor"
559f56c7	51	default CPU_FREQ_DEFAULT_GOV_USERSPACE if ARM_SA1100_CPUFREQ \|\| ARM_SA1110_CPUFREQ
1da177e4 LT	52	default CPU_FREQ_DEFAULT_GOV_PERFORMANCE
	53	help
	54	This option sets which CPUFreq governor shall be loaded at
	55	startup. If in doubt, select 'performance'.
	56
	57	config CPU_FREQ_DEFAULT_GOV_PERFORMANCE
	58	bool "performance"
	59	select CPU_FREQ_GOV_PERFORMANCE
	60	help
	61	Use the CPUFreq governor 'performance' as default. This sets
	62	the frequency statically to the highest frequency supported by
	63	the CPU.
	64
30d221db AG	65	config CPU_FREQ_DEFAULT_GOV_POWERSAVE
30d221db AG	66	bool "powersave"
30d221db AG	67	select CPU_FREQ_GOV_POWERSAVE
	68	help
	69	Use the CPUFreq governor 'powersave' as default. This sets
	70	the frequency statically to the lowest frequency supported by
	71	the CPU.
	72
1da177e4 LT	73	config CPU_FREQ_DEFAULT_GOV_USERSPACE
	74	bool "userspace"
	75	select CPU_FREQ_GOV_USERSPACE
	76	help
	77	Use the CPUFreq governor 'userspace' as default. This allows
0211a9c8	78	you to set the CPU frequency manually or when a userspace
1da177e4 LT	79	program shall be able to set the CPU dynamically without having
	80	to enable the userspace governor manually.
	81
1c256245 TR	82	config CPU_FREQ_DEFAULT_GOV_ONDEMAND
	83	bool "ondemand"
	84	select CPU_FREQ_GOV_ONDEMAND
	85	select CPU_FREQ_GOV_PERFORMANCE
	86	help
	87	Use the CPUFreq governor 'ondemand' as default. This allows
	88	you to get a full dynamic frequency capable system by simply
	89	loading your cpufreq low-level hardware driver.
	90	Be aware that not all cpufreq drivers support the ondemand
	91	governor. If unsure have a look at the help section of the
	92	driver. Fallback governor will be the performance governor.
	93
	94	config CPU_FREQ_DEFAULT_GOV_CONSERVATIVE
	95	bool "conservative"
	96	select CPU_FREQ_GOV_CONSERVATIVE
	97	select CPU_FREQ_GOV_PERFORMANCE
	98	help
	99	Use the CPUFreq governor 'conservative' as default. This allows
	100	you to get a full dynamic frequency capable system by simply
	101	loading your cpufreq low-level hardware driver.
	102	Be aware that not all cpufreq drivers support the conservative
	103	governor. If unsure have a look at the help section of the
	104	driver. Fallback governor will be the performance governor.
9bdcb44e RW	105
	106	config CPU_FREQ_DEFAULT_GOV_SCHEDUTIL
	107	bool "schedutil"
cfe9492f	108	depends on SMP
9bdcb44e RW	109	select CPU_FREQ_GOV_SCHEDUTIL
	110	select CPU_FREQ_GOV_PERFORMANCE
	111	help
	112	Use the 'schedutil' CPUFreq governor by default. If unsure,
	113	have a look at the help section of that governor. The fallback
	114	governor will be 'performance'.
	115
1da177e4 LT	116	endchoice
	117
	118	config CPU_FREQ_GOV_PERFORMANCE
9101be53 MF	119	tristate "'performance' governor"
9101be53 MF	120	help
1da177e4 LT	121	This cpufreq governor sets the frequency statically to the
	122	highest available CPU frequency.
	123
9101be53 MF	124	To compile this driver as a module, choose M here: the
	125	module will be called cpufreq_performance.
	126
1da177e4 LT	127	If in doubt, say Y.
	128
	129	config CPU_FREQ_GOV_POWERSAVE
9101be53 MF	130	tristate "'powersave' governor"
9101be53 MF	131	help
1da177e4 LT	132	This cpufreq governor sets the frequency statically to the
	133	lowest available CPU frequency.
	134
9101be53 MF	135	To compile this driver as a module, choose M here: the
	136	module will be called cpufreq_powersave.
	137
1da177e4 LT	138	If in doubt, say Y.
	139
	140	config CPU_FREQ_GOV_USERSPACE
9101be53 MF	141	tristate "'userspace' governor for userspace frequency scaling"
9101be53 MF	142	help
1da177e4	143	Enable this cpufreq governor when you either want to set the
0211a9c8	144	CPU frequency manually or when a userspace program shall
1da177e4	145	be able to set the CPU dynamically, like on LART
4c41251e	146	<http://www.lartmaker.nl/>.
1da177e4	147
9101be53 MF	148	To compile this driver as a module, choose M here: the
	149	module will be called cpufreq_userspace.
	150
1da177e4 LT	151	For details, take a look at <file:Documentation/cpu-freq/>.
	152
	153	If in doubt, say Y.
	154
	155	config CPU_FREQ_GOV_ONDEMAND
	156	tristate "'ondemand' cpufreq policy governor"
1e15f295	157	select CPU_FREQ_GOV_COMMON
1da177e4 LT	158	help
	159	'ondemand' - This driver adds a dynamic cpufreq policy governor.
	160	The governor does a periodic polling and
	161	changes frequency based on the CPU utilization.
	162	The support for this governor depends on CPU capability to
	163	do fast frequency switching (i.e, very low latency frequency
	164	transitions).
	165
9101be53 MF	166	To compile this driver as a module, choose M here: the
	167	module will be called cpufreq_ondemand.
	168
1da177e4 LT	169	For details, take a look at linux/Documentation/cpu-freq.
	170
	171	If in doubt, say N.
	172
b9170836 DJ	173	config CPU_FREQ_GOV_CONSERVATIVE
	174	tristate "'conservative' cpufreq governor"
	175	depends on CPU_FREQ
1e15f295	176	select CPU_FREQ_GOV_COMMON
b9170836 DJ	177	help
	178	'conservative' - this driver is rather similar to the 'ondemand'
	179	governor both in its source code and its purpose, the difference is
	180	its optimisation for better suitability in a battery powered
	181	environment. The frequency is gracefully increased and decreased
	182	rather than jumping to 100% when speed is required.
	183
	184	If you have a desktop machine then you should really be considering
	185	the 'ondemand' governor instead, however if you are using a laptop,
	186	PDA or even an AMD64 based computer (due to the unacceptable
	187	step-by-step latency issues between the minimum and maximum frequency
	188	transitions in the CPU) you will probably want to use this governor.
	189
9101be53 MF	190	To compile this driver as a module, choose M here: the
	191	module will be called cpufreq_conservative.
	192
b9170836 DJ	193	For details, take a look at linux/Documentation/cpu-freq.
	194
	195	If in doubt, say N.
	196
9bdcb44e RW	197	config CPU_FREQ_GOV_SCHEDUTIL
9bdcb44e RW	198	tristate "'schedutil' cpufreq policy governor"
bf7cdff1	199	depends on CPU_FREQ && SMP
9bdcb44e RW	200	select CPU_FREQ_GOV_ATTR_SET
	201	select IRQ_WORK
	202	help
	203	This governor makes decisions based on the utilization data provided
	204	by the scheduler. It sets the CPU frequency to be proportional to
	205	the utilization/capacity ratio coming from the scheduler. If the
	206	utilization is frequency-invariant, the new frequency is also
	207	proportional to the maximum available frequency. If that is not the
	208	case, it is proportional to the current frequency of the CPU. The
	209	frequency tipping point is at utilization/capacity equal to 80% in
	210	both cases.
	211
	212	To compile this driver as a module, choose M here: the module will
	213	be called cpufreq_schedutil.
	214
	215	If in doubt, say N.
	216
f41f4815 VK	217	comment "CPU frequency scaling drivers"
f41f4815 VK	218
bbcf0719 VK	219	config CPUFREQ_DT
bbcf0719 VK	220	tristate "Generic DT based cpufreq driver"
5fbfbcd3	221	depends on HAVE_CLK && OF
bbcf0719	222	# if CPU_THERMAL is on and THERMAL=m, CPUFREQ_DT cannot be =y:
217886d3	223	depends on !CPU_THERMAL \|\| THERMAL
f56aad1d	224	select CPUFREQ_DT_PLATDEV
109df086	225	select PM_OPP
95ceafd4	226	help
bbcf0719	227	This adds a generic DT based cpufreq driver for frequency management.
95ceafd4 SG	228	It supports both uniprocessor (UP) and symmetric multiprocessor (SMP)
	229	systems which share clock and voltage across all CPUs.
	230
	231	If in doubt, say N.
	232
f56aad1d VK	233	config CPUFREQ_DT_PLATDEV
	234	bool
	235	help
	236	This adds a generic DT based cpufreq platdev driver for frequency
	237	management. This creates a 'cpufreq-dt' platform device, on the
	238	supported platforms.
	239
	240	If in doubt, say N.
	241
f41f4815	242	if X86
bb0a56ec	243	source "drivers/cpufreq/Kconfig.x86"
f41f4815	244	endif
bb0a56ec	245
f41f4815	246	if ARM \|\| ARM64
f7d77079	247	source "drivers/cpufreq/Kconfig.arm"
f41f4815	248	endif
f7d77079	249
f41f4815 VK	250	if PPC32 \|\| PPC64
	251	source "drivers/cpufreq/Kconfig.powerpc"
	252	endif
81c720c9	253
f41f4815	254	if AVR32
81c720c9 VK	255	config AVR32_AT32AP_CPUFREQ
	256	bool "CPU frequency driver for AT32AP"
	257	depends on PLATFORM_AT32AP
	258	default n
	259	help
	260	This enables the CPU frequency driver for AT32AP processors.
	261	If in doubt, say N.
f41f4815	262	endif
81c720c9	263
f41f4815	264	if IA64
ab423e43 VK	265	config IA64_ACPI_CPUFREQ
ab423e43 VK	266	tristate "ACPI Processor P-States driver"
ab423e43 VK	267	depends on ACPI_PROCESSOR
	268	help
	269	This driver adds a CPUFreq driver which utilizes the ACPI
	270	Processor Performance States.
	271
	272	For details, take a look at <file:Documentation/cpu-freq/>.
	273
	274	If in doubt, say N.
f41f4815	275	endif
ab423e43	276
f41f4815	277	if MIPS
7a998935 VK	278	config LOONGSON2_CPUFREQ
7a998935 VK	279	tristate "Loongson2 CPUFreq Driver"
7a998935 VK	280	help
	281	This option adds a CPUFreq driver for loongson processors which
	282	support software configurable cpu frequency.
	283
	284	Loongson2F and it's successors support this feature.
	285
	286	For details, take a look at <file:Documentation/cpu-freq/>.
	287
	288	If in doubt, say N.
	289
a0a22cf1 KC	290	config LOONGSON1_CPUFREQ
	291	tristate "Loongson1 CPUFreq Driver"
	292	help
	293	This option adds a CPUFreq driver for loongson1 processors which
	294	support software configurable cpu frequency.
	295
	296	For details, take a look at <file:Documentation/cpu-freq/>.
	297
	298	If in doubt, say N.
f41f4815	299	endif
a0a22cf1	300
f41f4815	301	if SPARC64
764295ae VK	302	config SPARC_US3_CPUFREQ
764295ae VK	303	tristate "UltraSPARC-III CPU Frequency driver"
764295ae VK	304	help
	305	This adds the CPUFreq driver for UltraSPARC-III processors.
	306
	307	For details, take a look at <file:Documentation/cpu-freq>.
	308
	309	If in doubt, say N.
	310
	311	config SPARC_US2E_CPUFREQ
	312	tristate "UltraSPARC-IIe CPU Frequency driver"
764295ae VK	313	help
	314	This adds the CPUFreq driver for UltraSPARC-IIe processors.
	315
	316	For details, take a look at <file:Documentation/cpu-freq>.
	317
	318	If in doubt, say N.
f41f4815	319	endif
764295ae	320
f41f4815	321	if SUPERH
7258267e VK	322	config SH_CPU_FREQ
7258267e VK	323	tristate "SuperH CPU Frequency driver"
7258267e VK	324	help
	325	This adds the cpufreq driver for SuperH. Any CPU that supports
	326	clock rate rounding through the clock framework can use this
	327	driver. While it will make the kernel slightly larger, this is
	328	harmless for CPUs that don't support rate rounding. The driver
	329	will also generate a notice in the boot log before disabling
	330	itself if the CPU in question is not capable of rate rounding.
	331
	332	For details, take a look at <file:Documentation/cpu-freq>.
	333
	334	If unsure, say N.
f41f4815	335	endif
7258267e	336
2f249358 TY	337	config QORIQ_CPUFREQ
	338	tristate "CPU frequency scaling driver for Freescale QorIQ SoCs"
	339	depends on OF && COMMON_CLK && (PPC_E500MC \|\| ARM)
ddd30ef4	340	depends on !CPU_THERMAL \|\| THERMAL
2f249358 TY	341	select CLK_QORIQ
	342	help
	343	This adds the CPUFreq driver support for Freescale QorIQ SoCs
	344	which are capable of changing the CPU's frequency dynamically.
	345
bb0a56ec DJ	346	endif
bb0a56ec DJ	347	endmenu