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| author | Rajagopal Venkat <rajagopal.venkat@linaro.org> | 2012-10-26 01:50:09 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2012-11-15 00:35:04 +0100 |
| commit | 7e6fdd4bad033fa2d73716377b184fa975b0d985 (patch) | |
| tree | 171f13c8aadd833965a9cb0b83a84fe3eb74c1da /Documentation/ABI | |
| parent | Linux 3.7-rc5 (diff) | |
| download | linux-7e6fdd4bad033fa2d73716377b184fa975b0d985.tar.xz linux-7e6fdd4bad033fa2d73716377b184fa975b0d985.zip | |
PM / devfreq: Core updates to support devices which can idle
Prepare devfreq core framework to support devices which
can idle. When device idleness is detected perhaps through
runtime-pm, need some mechanism to suspend devfreq load
monitoring and resume back when device is online. Present
code continues monitoring unless device is removed from
devfreq core.
This patch introduces following design changes,
- use per device work instead of global work to monitor device
load. This enables suspend/resume of device devfreq and
reduces monitoring code complexity.
- decouple delayed work based load monitoring logic from core
by introducing helpers functions to be used by governors. This
provides flexibility for governors either to use delayed work
based monitoring functions or to implement their own mechanism.
- devfreq core interacts with governors via events to perform
specific actions. These events include start/stop devfreq.
This sets ground for adding suspend/resume events.
The devfreq apis are not modified and are kept intact.
Signed-off-by: Rajagopal Venkat <rajagopal.venkat@linaro.org>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-devfreq | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-devfreq b/Documentation/ABI/testing/sysfs-class-devfreq index 23d78b5aab11..89283b1b0240 100644 --- a/Documentation/ABI/testing/sysfs-class-devfreq +++ b/Documentation/ABI/testing/sysfs-class-devfreq @@ -21,14 +21,6 @@ Description: The /sys/class/devfreq/.../cur_freq shows the current frequency of the corresponding devfreq object. -What: /sys/class/devfreq/.../central_polling -Date: September 2011 -Contact: MyungJoo Ham <myungjoo.ham@samsung.com> -Description: - The /sys/class/devfreq/.../central_polling shows whether - the devfreq ojbect is using devfreq-provided central - polling mechanism or not. - What: /sys/class/devfreq/.../polling_interval Date: September 2011 Contact: MyungJoo Ham <myungjoo.ham@samsung.com> |