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Nishanth Menon d287de855f PM / devfreq: Add sysfs node to expose available frequencies 
devfreq governors such as ondemand are controlled by a min and
max frequency, while governors like userspace governor allow us
to set a specific frequency.
However, for the same specific device, depending on the SoC, the
available frequencies can vary.

So expose the available frequencies as a snapshot over sysfs to
allow informed decisions.

This was inspired by cpufreq framework's equivalent for similar
usage sysfs node: scaling_available_frequencies.

Cc: Rajagopal Venkat <rajagopal.venkat@linaro.org>
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Kevin Hilman <khilman@ti.com>
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2012-11-20 15:59:32 +09:00
..
ABI
PM / devfreq: Add sysfs node to expose available frequencies
2012-11-20 15:59:32 +09:00
accounting
doc: getdelays.c: remember to close() socket on error in create_nl_socket()
2012-09-01 09:58:59 -07:00
acpi
Update documentation for parameter *notrigger* in einj.txt
2012-03-30 03:30:19 -04:00
aoe
aoe: update documentation to better reflect aoe-plus-udev usage
2012-10-06 03:05:30 +09:00
arm
Merge branch 'fixes' into for-linus
2012-10-11 10:55:04 +01:00
arm64
arm64: Move PCI_IOBASE closer to MODULES_VADDR
2012-10-23 15:30:51 +01:00
auxdisplay
…
backlight
backlight: new backlight driver for LP855x devices
2012-03-23 16:58:33 -07:00
blackfin
Documentation: Fix typo in multiple files in Documentation
2012-04-16 14:37:13 +02:00
block
block: Kill bi_destructor
2012-09-09 10:35:39 +02:00
blockdev
Documentation: remove references to /etc/modprobe.conf
2012-03-30 16:03:15 -07:00
cdrom
doc: fix broken references
2011-09-27 18:08:04 +02:00
cgroups
memcg: trivial fixes for Documentation/cgroups/memory.txt
2012-10-09 16:22:54 +09:00
connector
connector: Move cn_test.c away from NLMSG_PUT().
2012-06-26 21:19:02 -07:00
console
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cpu-freq
acpi-cpufreq: Add support for disabling dynamic overclocking
2012-09-09 22:05:12 +02:00
cpuidle
Honor state disabling in the cpuidle ladder governor
2012-09-04 01:35:44 +02:00
cris
CRIS: Update documentation
2012-04-03 13:09:18 +02:00
crypto
KEYS: Document asymmetric key type
2012-10-08 13:50:12 +10:30
development-process
Documentation: Update stable address
2011-12-12 14:14:31 -08:00
device-mapper
DM RAID: Add rebuild capability for RAID10
2012-10-11 13:40:24 +11:00
devicetree
Merge tag 'v3.7-rc3' into for-linus to sync up with recent USB changes
2012-10-30 00:09:18 -07:00
DocBook
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
2012-10-18 16:10:42 -07:00
driver-model
pwm: add devm_pwm_get() and devm_pwm_put()
2012-09-10 17:05:45 +02:00
dvb
get_dvb_firmware: fix download site for tda10046 firmware
2012-09-28 16:16:00 -03:00
early-userspace
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EDID
drm: allow loading an EDID as firmware to override broken monitor
2012-03-20 10:09:28 +00:00
extcon
Documentation/extcon: porting guide for Android kernel switch driver.
2012-04-20 09:24:27 -07:00
fault-injection
fault-injection: add tool to run command with failslab or fail_page_alloc
2012-07-30 17:25:22 -07:00
fb
Documentation: remove references to /etc/modprobe.conf
2012-03-30 16:03:15 -07:00
filesystems
Merge branch 'for-3.7' of git://linux-nfs.org/~bfields/linux
2012-10-13 10:53:54 +09:00
firmware_class
firmware loader: document kernel direct loading
2012-10-25 11:53:36 -07:00
frv
doc: fix broken references
2011-09-27 18:08:04 +02:00
hid
HID: sensors: add documentation
2012-09-06 19:11:04 +01:00
hwmon
hwmon, fam15h_power: Change email address, MAINTAINERS entry
2012-10-29 17:48:01 -07:00
i2c
i2c-mux-gpio: Update documentation
2012-10-05 22:23:54 +02:00
i2o
Documentation: Fix multiple typo in Documentation
2012-03-07 16:08:24 +01:00
ia64
doc: aliasing-test: close fd on write error
2012-09-01 09:57:10 -07:00
ide
Documentation: remove references to /etc/modprobe.conf
2012-03-30 16:03:15 -07:00
infiniband
IB/ipoib: Add rtnl_link_ops support
2012-09-20 16:49:17 -04:00
input
Input: add driver for FT5x06 based EDT displays
2012-07-24 23:55:03 -07:00
ioctl
ioctl-number.txt: Remove legacy private ioctl's from media drivers
2012-08-14 00:07:39 -03:00
isdn
Documentation: remove references to /etc/modprobe.conf
2012-03-30 16:03:15 -07:00
ja_JP
Merge branch 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6
2011-07-25 23:06:24 -07:00
kbuild
UAPI: Remove the objhdr-y export list
2012-10-02 18:01:56 +01:00
kdump
kexec: update URL of kexec homepage
2012-07-18 18:35:57 -07:00
ko_KR
driver-core: documentation: fix up Greg's email address
2012-02-15 14:48:01 -08:00
laptops
Documentation: fix the VM knobs descritpion WRT pdflush
2012-08-04 12:15:09 +04:00
leds
leds-lp5523: add channel name in the platform data
2012-09-11 18:32:41 +08:00
m68k
Documentation: add pointer to name_to_dev_t for root= values
2011-08-03 14:25:21 -10:00
make
…
memory-devices
memory: emif: add basic infrastructure for EMIF driver
2012-05-02 00:10:49 -07:00
mips
…
misc-devices
lis3lv02d: Add STMicroelectronics lis331dlh digital accelerometer
2012-09-05 13:44:04 -07:00
mmc
mmc: core: Fixup delayed work clock gating patch
2012-01-11 23:58:43 -05:00
mn10300
…
mtd
…
namespaces
…
netlabel
…
networking
vxlan: virtual extensible lan
2012-10-01 18:39:45 -04:00
nfc
NFC: Error management documentation
2012-07-09 16:42:11 -04:00
parisc
Documentation: Fix typo in multiple files in Documentation
2012-04-16 14:37:13 +02:00
PCI
doc: fix broken references
2011-09-27 18:08:04 +02:00
pcmcia
…
power
Merge tag 'for-v3.7' of git://git.infradead.org/battery-2.6
2012-10-07 17:29:24 +09:00
powerpc
Revert "powerpc/hw-breakpoint: Use generic hw-breakpoint interfaces for new PPC ptrace flags"
2012-05-22 14:37:24 +10:00
pps
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prctl
security: Minor improvements to no_new_privs documentation
2012-07-08 00:25:48 +10:00
pti
…
ptp
…
rapidio
RapidIO: documentation update
2011-11-02 16:07:02 -07:00
RCU
Merge branches 'bigrt.2012.09.23a', 'doctorture.2012.09.23a', 'fixes.2012.09.23a', 'hotplug.2012.09.23a' and 'idlechop.2012.09.23a' into HEAD
2012-09-24 20:02:22 -07:00
s390
Documentation: remove references to /etc/modprobe.conf
2012-03-30 16:03:15 -07:00
scheduler
sched: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW
2012-09-13 16:52:04 +02:00
scsi
[SCSI] megaraid_sas: Version, Changelog, Copyright update
2012-10-09 11:21:48 +01:00
security
Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
2012-10-14 13:39:34 -07:00
serial
firmware: remove computone driver firmware and documentation
2012-08-16 12:31:18 -07:00
sh
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sound
Merge branch 'topic/tlv-chmap' into for-next
2012-09-15 16:32:31 +02:00
spi
Merge tag 'spi-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc
2012-10-02 17:26:42 -07:00
sysctl
coredump: add support for %d=__get_dumpable() in core name
2012-10-06 03:05:15 +09:00
target
target: Simplify fabric sense data length handling
2012-09-17 17:12:58 -07:00
telephony
…
thermal
hwmon: exynos4: move thermal sensor driver to driver/thermal directory
2012-09-24 14:44:38 +08:00
timers
doc: fix broken references
2011-09-27 18:08:04 +02:00
trace
doc: fix old config name of kprobetrace
2012-09-27 12:11:29 +02:00
usb
usb: add decriptor of persist fail for some morph usb devices
2012-08-10 12:06:39 -07:00
vDSO
Document the vDSO and add a reference parser
2011-07-14 17:57:09 -07:00
video4linux
[media] media: v4l2-ctrl: add a helper function to add standard control with driver specific menu
2012-10-05 21:48:03 -03:00
virtual
Merge branch 'for-linus-37rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml
2012-10-10 11:15:20 +09:00
vm
mm: remove vma arg from page_evictable
2012-10-09 16:22:55 +09:00
w1
1-Wire: Add support for the maxim ds1825 temperature sensor
2012-08-16 12:33:59 -07:00
watchdog
watchdog: fix watchdog-test.c build warning
2012-08-29 17:12:58 +02:00
wimax
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x86
x86/mce: Provide boot argument to honour bios-set CMCI threshold
2012-09-27 10:08:00 -07:00
zh_CN
Documentation:Chinese translation of Documentation/arm64/memory.txt
2012-10-25 11:54:06 -07:00
.gitignore
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00-INDEX
Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-10-24 04:07:02 +03:00
applying-patches.txt
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atomic_ops.txt
doc: Add load/store guarantees to Documentation/atomic-ops.txt
2011-12-11 10:31:58 -08:00
bad_memory.txt
…
basic_profiling.txt
…
binfmt_misc.txt
…
braille-console.txt
…
bt8xxgpio.txt
…
btmrvl.txt
…
BUG-HUNTING
…
bus-virt-phys-mapping.txt
doc: fix broken references
2011-09-27 18:08:04 +02:00
cachetlb.txt
…
Changes
Documentation/Changes: remove some really obsolete text
2011-07-11 16:48:38 -07:00
circular-buffers.txt
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clk.txt
Documentation: common clk API
2012-03-16 20:35:01 +00:00
coccinelle.txt
coccinelle.txt: update documentation to include M= option
2012-01-14 22:25:56 +01:00
CodingStyle
CodingStyle: add networking specific block comment style
2012-10-06 03:04:59 +09:00
cpu-hotplug.txt
documentation: remove references to cpu_*_map.
2012-03-29 15:38:31 +10:30
cpu-load.txt
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cputopology.txt
…
crc32.txt
crc32: move long comment about crc32 fundamentals to Documentation/
2012-03-23 16:58:37 -07:00
dcdbas.txt
…
debugging-modules.txt
…
debugging-via-ohci1394.txt
…
dell_rbu.txt
…
devices.txt
Doc: document max raw dev number
2012-06-03 12:05:50 +02:00
digsig.txt
crypto: digital signature verification support
2011-11-09 12:10:37 +02:00
DMA-API-HOWTO.txt
Documentation/DMA-API-HOWTO.txt: fix misleading example
2011-07-26 16:49:45 -07:00
DMA-API.txt
include/linux/dma-mapping.h: add dma_zalloc_coherent()
2011-11-02 16:07:02 -07:00
DMA-attributes.txt
common: DMA-mapping: add DMA_ATTR_SKIP_CPU_SYNC attribute
2012-07-30 12:25:47 +02:00
dma-buf-sharing.txt
dma-buf: add initial vmap documentation
2012-05-25 12:51:11 +05:30
DMA-ISA-LPC.txt
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dmaengine.txt
Documentation: Fix multiple typo in Documentation
2012-03-07 16:08:24 +01:00
dontdiff
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2012-10-01 09:06:36 -07:00
dynamic-debug-howto.txt
dynamic_debug: update Documentation/*, Kconfig.debug
2012-04-30 16:26:30 -04:00
edac.txt
Merge branch 'devel'
2012-07-29 21:11:05 -03:00
eisa.txt
MCA: delete all remaining traces of microchannel bus support.
2012-05-17 19:06:13 -04:00
email-clients.txt
Documentation: email-clients: Add better Thunderbird information
2011-08-13 18:34:03 -07:00
flexible-arrays.txt
…
futex-requeue-pi.txt
…
gcov.txt
…
gpio.txt
gpio: add flags to export GPIOs when requesting
2012-04-05 21:24:06 -07:00
highuid.txt
…
HOWTO
docs: update HOWTO for 2.6.x -> 3.x versioning
2012-04-19 19:13:08 -07:00
hw_random.txt
…
hwspinlock.txt
hwspinlock/core: register a bank of hwspinlocks in a single API call
2011-09-21 19:45:34 +03:00
init.txt
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initrd.txt
Documentation/initrd.txt: Change the location of util-linux
2012-05-25 16:18:34 +02:00
intel_txt.txt
…
Intel-IOMMU.txt
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io_ordering.txt
…
io-mapping.txt
…
iostats.txt
…
IPMI.txt
IPMI: Remove SMBus driver info from the docs
2012-10-16 18:07:12 -07:00
IRQ-affinity.txt
…
IRQ-domain.txt
irq_domain: Standardise legacy/linear domain selection
2012-07-11 14:59:17 +01:00
IRQ.txt
…
irqflags-tracing.txt
…
isapnp.txt
…
java.txt
…
kernel-doc-nano-HOWTO.txt
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kernel-docs.txt
doc: fix broken references
2011-09-27 18:08:04 +02:00
kernel-parameters.txt
Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
2012-10-14 13:39:34 -07:00
kmemcheck.txt
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kmemleak.txt
kmemleak: Handle percpu memory allocation
2011-12-02 16:12:42 +00:00
kobject.txt
Documentation: Fix "struct kobj_type" to include newer members.
2012-09-04 16:06:34 -07:00
kprobes.txt
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kref.txt
…
ldm.txt
…
local_ops.txt
…
lockdep-design.txt
lockdep: Update documentation for lock-class leak detection
2011-12-11 10:31:23 -08:00
lockstat.txt
…
lockup-watchdogs.txt
watchdog: Update documentation
2012-02-11 15:11:28 +01:00
logo.gif
…
logo.txt
…
magic-number.txt
drivers/net: fix up stale paths from driver reorg
2012-01-30 12:54:40 -05:00
Makefile
mei: move doc files Documentation/misc-devices/mei
2012-05-09 13:59:09 -07:00
ManagementStyle
Documentation: ManagementStyle: fixed typo
2012-06-28 12:03:15 +02:00
md.txt
md: create externally visible flags for supporting hot-replace.
2011-12-23 10:17:51 +11:00
media-framework.txt
[media] media: Add link_validate() op to check links to the sink pad
2012-05-14 08:44:11 -03:00
memory-barriers.txt
doc: fix broken references
2011-09-27 18:08:04 +02:00
memory-hotplug.txt
Documentation: Fix typo in multiple files in Documentation
2012-04-16 14:37:13 +02:00
mono.txt
Documentation: remove references to /etc/modprobe.conf
2012-03-30 16:03:15 -07:00
mutex-design.txt
…
nommu-mmap.txt
…
numastat.txt
Doc: Update numastat.txt
2012-02-28 16:05:06 +01:00
oops-tracing.txt
module,bug: Add TAINT_OOT_MODULE flag for modules not built in-tree
2011-11-07 07:54:42 +10:30
padata.txt
…
parport-lowlevel.txt
…
parport.txt
Documentation: remove references to /etc/modprobe.conf
2012-03-30 16:03:15 -07:00
percpu-rw-semaphore.txt
percpu-rw-semaphore: fix documentation typos
2012-09-26 19:56:15 +02:00
pi-futex.txt
…
pinctrl.txt
pinctrl: document semantics vs GPIO
2012-09-17 10:53:57 +02:00
pnp.txt
…
preempt-locking.txt
…
printk-formats.txt
lib/vsprintf: update documentation to cover all of %p[Mm][FR]
2012-10-06 03:04:50 +09:00
pwm.txt
pwm: add devm_pwm_get() and devm_pwm_put()
2012-09-10 17:05:45 +02:00
ramoops.txt
pstore/ftrace: Convert to its own enable/disable debugfs knob
2012-09-06 22:16:58 -07:00
rbtree.txt
rbtree: move augmented rbtree functionality to rbtree_augmented.h
2012-10-09 16:22:40 +09:00
remoteproc.txt
remoteproc: add rproc_report_crash function to notify rproc crashes
2012-09-18 12:53:22 +03:00
rfkill.txt
doc: fix broken references
2011-09-27 18:08:04 +02:00
robust-futex-ABI.txt
…
robust-futexes.txt
…
rpmsg.txt
rpmsg: add virtio-based remote processor messaging bus
2012-02-08 22:53:58 +02:00
rt-mutex-design.txt
…
rt-mutex.txt
…
rtc.txt
rtc-proc: permit the /proc/driver/rtc device to use other devices
2012-10-06 03:05:01 +09:00
SAK.txt
…
SecurityBugs
…
serial-console.txt
…
sgi-ioc4.txt
…
sgi-visws.txt
…
SM501.txt
…
smsc_ece1099.txt
mfd: smsc: Add support for smsc gpio io/keypad driver
2012-10-01 15:27:48 +02:00
sparse.txt
…
spinlocks.txt
Documentation/spinlocks.txt: Remove reference to sti()/cli()
2011-07-11 12:45:04 -07:00
stable_api_nonsense.txt
…
stable_kernel_rules.txt
stable: Allow merging of backports for serious user-visible performance issues
2012-06-25 12:11:58 -07:00
static-keys.txt
Documentation: Fix typo in multiple files in Documentation
2012-04-16 14:37:13 +02:00
SubmitChecklist
Documentation/SubmitChecklist: add RCU debug config options
2011-07-25 20:57:17 -07:00
SubmittingDrivers
Documentation: SubmittingDrivers: fix Linus's git tree URL
2011-08-13 18:34:03 -07:00
SubmittingPatches
Documentation/SubmittingPatches: suggested the use of scripts/get_maintainer.pl
2012-05-25 16:18:30 +02:00
svga.txt
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sysfs-rules.txt
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sysrq.txt
sparc64: Add global PMU register dumping via sysrq.
2012-10-16 09:34:01 -07:00
unaligned-memory-access.txt
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unicode.txt
…
unshare.txt
…
vfio.txt
vfio: Trivial Documentation correction
2012-09-21 10:48:03 -06:00
VGA-softcursor.txt
…
vgaarbiter.txt
misc latin1 to utf8 conversions
2012-01-02 13:04:55 +01:00
video-output.txt
…
vme_api.txt
VME: Move API documentation to Documentation folder
2012-05-08 16:01:34 -07:00
volatile-considered-harmful.txt
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workqueue.txt
workqueue: reimplement WQ_HIGHPRI using a separate worker_pool
2012-07-13 22:24:45 -07:00
xz.txt
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zorro.txt
…