| Message ID | 1542823301-23563-2-git-send-email-l.luba@partner.samsung.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
| Series | devfreq: handle suspend/resume | expand |
Hi, On 2018년 11월 22일 03:01, Lukasz Luba wrote: > 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. > > The patch draws on Tobias Jakobi's work posted ~2 years ago, who tried to > solve issue with devfreq device's frequency during suspend/resume. > During the discussion on LKML some corner cases and comments appeared > related to the design. This patch address them keeping in mind suggestions > from Chanwoo Choi. You already explain the patch history on cover letter. It is enough. Please remove the duplicate history description from all patches except for cover letter. > > 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> > --- > drivers/devfreq/devfreq.c | 3 +++ > include/linux/devfreq.h | 4 ++++ > 2 files changed, 7 insertions(+) > > diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c > index 1414130..e20e7e4 100644 > --- a/drivers/devfreq/devfreq.c > +++ b/drivers/devfreq/devfreq.c > @@ -657,6 +657,9 @@ struct devfreq *devfreq_add_device(struct device *dev, > } > devfreq->max_freq = devfreq->scaling_max_freq; > > + devfreq->suspend_freq = dev_pm_opp_get_suspend_opp_freq(dev); > + atomic_set(&devfreq->suspend_count, 0); > + > dev_set_name(&devfreq->dev, "devfreq%d", > atomic_inc_return(&devfreq_no)); > err = device_register(&devfreq->dev); > diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h > index e4963b0..7fe96f9 100644 > --- a/include/linux/devfreq.h > +++ b/include/linux/devfreq.h > @@ -167,6 +167,10 @@ 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; > You don't need to make the separate patch for this. You can squash patch1 into patch3 because the newly added variables are used on patch3.
>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. > >The patch draws on Tobias Jakobi's work posted ~2 years ago, who tried to >solve issue with devfreq device's frequency during suspend/resume. >During the discussion on LKML some corner cases and comments appeared >related to the design. This patch address them keeping in mind suggestions >from Chanwoo Choi. > >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> When you add new elements in a common struct (i.e., struct devfreq), please describe kindly in the doxygen entries so that developers may understand before reading all places where the new elements are used. You have added three new elements and there is no explanations on them. Cheers, MyungJoo
Hi MyungJoo, On 11/26/18 9:14 AM, MyungJoo Ham wrote: >> 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. >> >> The patch draws on Tobias Jakobi's work posted ~2 years ago, who tried to >> solve issue with devfreq device's frequency during suspend/resume. >> During the discussion on LKML some corner cases and comments appeared >> related to the design. This patch address them keeping in mind suggestions >>from Chanwoo Choi. >> >> 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> > > When you add new elements in a common struct (i.e., struct devfreq), > please describe kindly in the doxygen entries so that developers > may understand before reading all places where the new elements are > used. > > You have added three new elements and there is no explanations on them. You are right, thank you for the review. I will fix it in the next patch set version. Regards, Lukasz > > > Cheers, > MyungJoo > > >
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 1414130..e20e7e4 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -657,6 +657,9 @@ struct devfreq *devfreq_add_device(struct device *dev, } devfreq->max_freq = devfreq->scaling_max_freq; + devfreq->suspend_freq = dev_pm_opp_get_suspend_opp_freq(dev); + atomic_set(&devfreq->suspend_count, 0); + dev_set_name(&devfreq->dev, "devfreq%d", atomic_inc_return(&devfreq_no)); err = device_register(&devfreq->dev); diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index e4963b0..7fe96f9 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -167,6 +167,10 @@ 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;
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. The patch draws on Tobias Jakobi's work posted ~2 years ago, who tried to solve issue with devfreq device's frequency during suspend/resume. During the discussion on LKML some corner cases and comments appeared related to the design. This patch address them keeping in mind suggestions from Chanwoo Choi. 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> --- drivers/devfreq/devfreq.c | 3 +++ include/linux/devfreq.h | 4 ++++ 2 files changed, 7 insertions(+)