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authorRajagopal Venkat <rajagopal.venkat@linaro.org>2012-10-26 03:50:09 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2012-11-15 03:35:04 +0400
commit7e6fdd4bad033fa2d73716377b184fa975b0d985 (patch)
tree171f13c8aadd833965a9cb0b83a84fe3eb74c1da /Documentation/ABI/testing/sysfs-class-devfreq
parent77b67063bb6bce6d475e910d3b886a606d0d91f7 (diff)
downloadlinux-7e6fdd4bad033fa2d73716377b184fa975b0d985.tar.xz
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/testing/sysfs-class-devfreq')
-rw-r--r--Documentation/ABI/testing/sysfs-class-devfreq8
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>