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ce26c5bb95
linux/Documentation/ABI/testing
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MyungJoo Ham ce26c5bb95 PM / devfreq: Add basic governors 
Four cpufreq-like governors are provided as examples.

powersave: use the lowest frequency possible. The user (device) should
set the polling_ms as 0 because polling is useless for this governor.

performance: use the highest freqeuncy possible. The user (device)
should set the polling_ms as 0 because polling is useless for this
governor.

userspace: use the user specified frequency stored at
devfreq.user_set_freq. With sysfs support in the following patch, a user
may set the value with the sysfs interface.

simple_ondemand: simplified version of cpufreq's ondemand governor.

When a user updates OPP entries (enable/disable/add), OPP framework
automatically notifies devfreq to update operating frequency
accordingly. Thus, devfreq users (device drivers) do not need to update
devfreq manually with OPP entry updates or set polling_ms for powersave
, performance, userspace, or any other "static" governors.

Note that these are given only as basic examples for governors and any
devices with devfreq may implement their own governors with the drivers
and use them.

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Mike Turquette <mturquette@ti.com>
Acked-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2011-10-02 00:19:34 +02:00
..
configfs-spear-pcie-gadget ST SPEAr: PCIE gadget suppport 2011-03-22 17:44:10 -07:00
debugfs-ec Documentation: Add new /sys/kernel/debug/ec/* files to ABI 2010-08-03 09:49:07 -04:00
debugfs-pktcdvd doc: use correct debugfs mountpoint 2009-04-13 15:04:33 -07:00
ima_policy ima: rename PATH_CHECK to FILE_CHECK 2010-02-07 03:06:23 -05:00
procfs-diskstats tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
pstore pstore: Allow the user to explicitly choose a backend 2011-07-22 16:14:39 -07:00
sysfs-ata [libata] Add ATA transport class 2010-10-21 20:21:03 -04:00
sysfs-block block: Add sysfs documentation for the discard topology parameters 2011-05-18 10:37:39 +02:00
sysfs-block-zram Staging: zram: Document sysfs entries 2010-08-31 15:34:36 -07:00
sysfs-bus-bcma bcma: add Broadcom specific AMBA bus driver 2011-05-10 15:54:54 -04:00
sysfs-bus-css Fix common misspellings 2011-03-31 11:26:23 -03:00
sysfs-bus-i2c-devices-fsa9480 drivers/misc: add support the FSA9480 USB Switch 2011-07-25 20:57:14 -07:00
sysfs-bus-i2c-devices-hm6352 hmc6352: add driver for the HMC6352 compass 2010-08-09 20:45:10 -07:00
sysfs-bus-media [media] media: Media device 2011-03-22 04:53:09 -03:00
sysfs-bus-pci PCI: add rescan to /sys/.../pci_bus/.../ 2011-05-21 12:17:12 -07:00
sysfs-bus-pci-devices-cciss cciss: export resettable host attribute 2011-03-11 20:06:09 +01:00
sysfs-bus-rbd rbd: update email address in Documentation 2011-03-21 15:06:50 -07:00
sysfs-bus-umc uwb: document UWB and WUSB sysfs files 2008-09-17 16:54:35 +01:00
sysfs-bus-usb USB: deprecate the power/level sysfs attribute 2010-05-20 13:21:37 -07:00
sysfs-bus-usb-devices-usbsevseg USB: Added driver for a Delcom USB 7-segment LED Display 2008-10-17 14:40:51 -07:00
sysfs-c2port Add c2 port support 2008-11-12 17:17:18 -08:00
sysfs-class
sysfs-class-backlight-driver-adp8870 backlight: new driver for the ADP8870 backlight devices 2011-06-15 20:03:59 -07:00
sysfs-class-bdi fuse: fix bdi naming conflict 2008-05-24 09:56:07 -07:00
sysfs-class-devfreq PM / devfreq: Add basic governors 2011-10-02 00:19:34 +02:00
sysfs-class-lcd video/lcd: document sysfs interface 2009-08-28 15:21:12 -04:00
sysfs-class-led Fix common misspellings 2011-03-31 11:26:23 -03:00
sysfs-class-mtd Documentation: add MTD sysfs docs 2009-05-29 15:13:04 +01:00
sysfs-class-net-batman-adv net: Add batman-adv meshing protocol 2010-12-16 13:44:24 -08:00
sysfs-class-net-mesh net: Add batman-adv meshing protocol 2010-12-16 13:44:24 -08:00
sysfs-class-pktcdvd
sysfs-class-power ds2760_battery: Document ABI change 2010-05-19 12:25:39 +04:00
sysfs-class-regulator regulator: add get_status() 2009-03-31 09:56:20 +01:00
sysfs-class-scsi_host [SCSI] isci: Adding documentation to API change and fixup sysfs registration 2011-08-23 19:54:24 -07:00
sysfs-class-uwb_rc uwb: add basic radio manager 2008-11-19 14:46:33 +00:00
sysfs-class-uwb_rc-wusbhc USB: wusb: add wusb_phy_rate sysfs file to host controllers 2009-12-11 11:55:16 -08:00
sysfs-dev sysfs: add /sys/dev/{char,block} to lookup sysfs path by major:minor 2008-07-21 21:54:40 -07:00
sysfs-devices
sysfs-devices-memory Documentation: update broken web addresses. 2010-08-04 15:21:40 +02:00
sysfs-devices-mmc mmc: export eMMC4.4 enhanced area details to sysfs 2011-03-15 13:48:01 -04:00
sysfs-devices-node mm: compaction: add /sys trigger for per-node memory compaction 2010-05-25 08:06:59 -07:00
sysfs-devices-platform-_UDC_-gadget USB: gadget: storage: optional SCSI WRITE FUA bit 2010-08-10 14:35:42 -07:00
sysfs-devices-power PM: Do not create wakeup sysfs files for devices that cannot wake up 2011-03-15 00:43:14 +01:00
sysfs-devices-system-cpu Documentation, ABI: Update L3 cache index disable text 2011-05-16 11:24:30 -07:00
sysfs-devices-system-ibm-rtl IBM Real-Time "SMI Free" mode driver -v7 2010-10-21 10:10:46 -04:00
sysfs-driver-hid HID: Add HID Report Descriptor to sysfs 2011-02-17 13:23:14 +01:00
sysfs-driver-hid-picolcd HID: split picolcd's operation_mode sysfs attribute 2010-04-27 15:31:26 +02:00
sysfs-driver-hid-prodikeys HID: Prodikeys PC-MIDI HID Driver 2010-05-12 15:18:59 +02:00
sysfs-driver-hid-roccat-arvo HID: roccat: Add 'Users:' tag to sysfs documentation 2011-02-03 17:29:49 +01:00
sysfs-driver-hid-roccat-kone Documentation: fix minor typos/spelling 2011-04-04 17:51:47 -07:00
sysfs-driver-hid-roccat-koneplus HID: roccat: Add "Roccat Talk" support for koneplus 2011-06-13 12:50:40 +02:00
sysfs-driver-hid-roccat-kovaplus Documentation: fix minor typos/spelling 2011-04-04 17:51:47 -07:00
sysfs-driver-hid-roccat-pyra Documentation: fix minor typos/spelling 2011-04-04 17:51:47 -07:00
sysfs-driver-hid-wiimote HID: wiimote: Add sysfs support to wiimote driver 2011-07-11 14:30:24 +02:00
sysfs-driver-samsung-laptop Platform: add Samsung Laptop platform driver 2011-03-28 06:28:12 -04:00
sysfs-firmware-acpi ACPI: add /sys/firmware/acpi/interrupts/sci_not counter 2009-04-21 00:35:47 -04:00
sysfs-firmware-dmi firmware: Fix grammar in sysfs-firmware-dmi doc 2011-04-19 16:45:51 -07:00
sysfs-firmware-gsmi driver: Google EFI SMI 2011-04-29 18:09:34 -07:00
sysfs-firmware-log driver: Google Memory Console 2011-04-29 18:09:34 -07:00
sysfs-firmware-memmap Bernhard has moved 2009-02-18 15:37:56 -08:00
sysfs-firmware-sfi SFI: add sysfs interface for SFI tables. 2010-05-27 12:46:20 -04:00
sysfs-firmware-sgi_uv sysfs: document files in /sys/firmware/sgi_uv/ 2008-09-02 19:21:40 -07:00
sysfs-fs-ext4 ext4: update ext4 documentation 2011-02-21 20:16:21 -05:00
sysfs-gpio gpiolib: allow poll() on value 2009-09-23 07:39:48 -07:00
sysfs-i2c-bmp085 drivers/misc: support for the pressure sensor BMP085 from Bosch Sensortec 2010-08-09 20:45:05 -07:00
sysfs-ibft Firmware: add iSCSI iBFT Support 2008-04-19 19:10:28 -07:00
sysfs-kernel-fscaps kernel/ksysfs.c: expose file_caps_enabled in sysfs 2011-04-19 16:45:51 -07:00
sysfs-kernel-mm mm: create /sys/kernel/mm 2008-07-24 10:47:17 -07:00
sysfs-kernel-mm-cleancache mm/fs: cleancache documentation 2011-05-26 10:00:56 -06:00
sysfs-kernel-mm-hugepages hugetlb: new sysfs interface 2008-07-24 10:47:17 -07:00
sysfs-kernel-slab slub: allow stats to be cleared 2009-10-15 21:34:12 +03:00
sysfs-kernel-uids Documentation: create new scheduler/ subdirectory 2008-02-07 08:42:17 -08:00
sysfs-memory-page-offline HWPOISON: Add soft page offline support 2009-12-16 12:20:00 +01:00
sysfs-module USB: EHCI: Allow users to override 80% max periodic bandwidth 2011-07-08 14:51:33 -07:00
sysfs-ocfs2 ocfs2: Document /sys/fs/ocfs2 2008-04-18 08:56:07 -07:00
sysfs-platform-asus-laptop Documentation: fix minor typos/spelling 2011-04-04 17:51:47 -07:00
sysfs-platform-asus-wmi eeepc-wmi: asus generic asus-wmi.ko module 2011-03-28 06:07:20 -04:00
sysfs-platform-at91 can: at91_can: make can_id of mailbox 0 configurable 2011-01-24 14:56:37 +01:00
sysfs-platform-eeepc-laptop eeepc-laptop: set the right paths in the documentation 2010-02-28 19:30:57 +01:00
sysfs-platform-ideapad-laptop ideapad: define cfg bits and create sysfs node for cfg 2011-08-05 14:45:42 -04:00
sysfs-platform-kim drivers:misc: ti-st: move from rfkill to sysfs 2011-02-04 12:41:20 -08:00
sysfs-power PM / Hibernate: Add sysfs knob to control size of memory for drivers 2011-05-17 23:19:19 +02:00
sysfs-pps LinuxPPS: core support 2009-06-18 13:04:04 -07:00
sysfs-profiling profiling: dynamically enable readprofile at runtime 2008-10-16 11:21:31 -07:00
sysfs-ptp ptp: Added a brand new class driver for ptp clocks. 2011-05-23 13:01:00 -07:00
sysfs-tty tty: add 'active' sysfs attribute to tty0 and console device 2010-12-16 16:15:34 -08:00
sysfs-wacom HID: wacom: add ABI doc entry for speed attribute 2010-04-23 02:14:10 +02:00
sysfs-wusb_cbaf uwb: document UWB and WUSB sysfs files 2008-09-17 16:54:35 +01:00