diff options
| author | Lukasz Luba <l.luba@partner.samsung.com> | 2018-12-05 12:05:53 +0100 |
|---|---|---|
| committer | MyungJoo Ham <myungjoo.ham@samsung.com> | 2018-12-11 11:09:47 +0900 |
| commit | 83f8ca45afbf041e312909f442128b99657d90b7 (patch) | |
| tree | d9f1ef6d6749aaaa6963cea58747a8024a24f61e /include/linux/devfreq.h | |
| parent | 633141721b5bfce7017033a767208af591134b8f (diff) | |
| download | lwn-83f8ca45afbf041e312909f442128b99657d90b7.tar.gz lwn-83f8ca45afbf041e312909f442128b99657d90b7.zip | |
PM / devfreq: add support for suspend/resume of a devfreq device
The patch prepares devfreq device for handling suspend/resume
functionality. The new fields will store needed information during this
process. Devfreq framework handles opp-suspend DT entry and there is no
need of modyfications in the drivers code. It uses atomic variables to
make sure no race condition affects the process.
Suggested-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Suggested-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Diffstat (limited to 'include/linux/devfreq.h')
| -rw-r--r-- | include/linux/devfreq.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index e4963b0f45da..d98519996927 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -131,6 +131,9 @@ struct devfreq_dev_profile { * @scaling_min_freq: Limit minimum frequency requested by OPP interface * @scaling_max_freq: Limit maximum frequency requested by OPP interface * @stop_polling: devfreq polling status of a device. + * @suspend_freq: frequency of a device set during suspend phase. + * @resume_freq: frequency of a device set in resume phase. + * @suspend_count: suspend requests counter for a device. * @total_trans: Number of devfreq transitions * @trans_table: Statistics of devfreq transitions * @time_in_state: Statistics of devfreq states @@ -167,6 +170,10 @@ struct devfreq { unsigned long scaling_max_freq; bool stop_polling; + unsigned long suspend_freq; + unsigned long resume_freq; + atomic_t suspend_count; + /* information for device frequency transition */ unsigned int total_trans; unsigned int *trans_table; |