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Subject[PATCH v2 0/3] devfreq: Add support for devices which can idle
From: Rajagopal Venkat <>

This patchset updates devfreq core to add support for devices
which can idle. When device idleness is detected perhaps
through runtime-pm, need some mechanism to suspend devfreq
load monitoring and resume when device is back online.

patch 1 introduce core design changes - per device work, decouple
delayed work from core and event based interaction.
patch 2 add devfreq suspend and resume apis.
patch 3 add new sysfs attribute for governor predicted next target
frequency and callback for current device frequency.

The existing devfreq apis are kept intact. Two new apis
devfreq_suspend_device() and devfreq_resume_device() are
added to support suspend/resume of device devfreq.

Changes since v1:
- revised locking mechanism
- added kerneldoc comments for load monitoring helper functions
- Fixed minor review comments

Rajagopal Venkat (3):
devfreq: Core updates to support devices which can idle
devfreq: Add suspend and resume apis
devfreq: Add current freq callback in device profile

Documentation/ABI/testing/sysfs-class-devfreq | 15 +-
drivers/devfreq/devfreq.c | 413 +++++++++++---------------
drivers/devfreq/governor.h | 11 +
drivers/devfreq/governor_performance.c | 16 +-
drivers/devfreq/governor_powersave.c | 16 +-
drivers/devfreq/governor_simpleondemand.c | 40 +++
drivers/devfreq/governor_userspace.c | 23 +-
include/linux/devfreq.h | 46 ++-
8 files changed, 291 insertions(+), 289 deletions(-)


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