From: Chun-Hung Wu <chun-hung.wu@mediatek.com>
To: Matthias Brugger <matthias.bgg@gmail.com>,
Jonathan Cameron <jic23@kernel.org>
Cc: Hartmut Knaack <knaack.h@gmx.de>,
Lars-Peter Clausen <lars@metafoo.de>,
Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>, <linux-iio@vger.kernel.org>,
<devicetree@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <wsd_upstream@mediatek.com>,
<peter.wang@mediatek.com>, <kuohong.wang@mediatek.com>,
<jg_poxu@mediatek.com>, <stanley.chu@mediatek.com>
Subject: Re: [PATCH 3/4] iio: adc: mediatek: SET_LATE_SYSTEM_SLEEP_PM_OPS support
Date: Tue, 28 May 2019 18:59:56 +0800 [thread overview]
Message-ID: <1559041196.12867.3.camel@mtkswgap22> (raw)
In-Reply-To: <7838dcae-8a69-0297-718b-a061b14a456d@gmail.com>
Hi Matthias:
Thanks for your suggestion, I think device_links is a good way to
make dependency of module's suspend/resume order.
Hi Jonathan:
Is it ok to keep using late_suspend and early_resume, or do you think
it's better to use device_links?
Thanks,
Chun-Hung
On Wed, 2019-05-22 at 18:28 +0200, Matthias Brugger wrote:
>
> On 20/05/2019 08:03, Chun-Hung Wu wrote:
> > Hi Jonathan:
> >
> > Thanks for the prompt reply,
> >
> > On Sat, 2019-05-18 at 11:35 +0100, Jonathan Cameron wrote:
> >> On Thu, 16 May 2019 16:10:46 +0800
> >> Chun-Hung Wu <chun-hung.wu@mediatek.com> wrote:
> >>
> >>> Move suspend/resume to late_suspend and
> >>> early_resume to gurantee users can use auxadc
> >> guarantee
> >>
> > will fix it in next version.
> >>> driver at suspend/resume stage.
> >> No problem with the patch content, but we need a reason why they may
> >> want to do so?
> > Our thermal drivers uses auxadc at suspend/resume stage.
> > In order to avoid auxadc suspended prior to thermal driver,
> > we move auxadc to late_suspend and early_resume.
> >
>
> That sounds like a user of device_links [1] to me.
>
> [1] https://www.kernel.org/doc/html/latest/driver-api/device_link.html
>
> > Thanks,
> > Chun-Hung
> >>
> >> Thanks,
> >>
> >> Jonathan
> >>>
> >>> Signed-off-by: Chun-Hung Wu <chun-hung.wu@mediatek.com>
> >>> ---
> >>> drivers/iio/adc/mt6577_auxadc.c | 7 ++++---
> >>> 1 file changed, 4 insertions(+), 3 deletions(-)
> >>>
> >>> diff --git a/drivers/iio/adc/mt6577_auxadc.c b/drivers/iio/adc/mt6577_auxadc.c
> >>> index e1bdcc0..58d7cb2 100644
> >>> --- a/drivers/iio/adc/mt6577_auxadc.c
> >>> +++ b/drivers/iio/adc/mt6577_auxadc.c
> >>> @@ -326,9 +326,10 @@ static int mt6577_auxadc_remove(struct platform_device *pdev)
> >>> return 0;
> >>> }
> >>>
> >>> -static SIMPLE_DEV_PM_OPS(mt6577_auxadc_pm_ops,
> >>> - mt6577_auxadc_suspend,
> >>> - mt6577_auxadc_resume);
> >>> +static const struct dev_pm_ops mt6577_auxadc_pm_ops = {
> >>> + SET_LATE_SYSTEM_SLEEP_PM_OPS(mt6577_auxadc_suspend,
> >>> + mt6577_auxadc_resume)
> >>> +};
> >>>
> >>> static const struct of_device_id mt6577_auxadc_of_match[] = {
> >>> { .compatible = "mediatek,mt2701-auxadc", .data = &mt8173_compat},
> >>
> >
> >
next prev parent reply other threads:[~2019-05-28 11:00 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-16 8:10 [PATCH 0/4] iio: adc: mediatek: add mt6765 driver support Chun-Hung Wu
2019-05-16 8:10 ` [PATCH 1/4] dt-bindings: iio: adc: mediatek: Add document for mt6765 Chun-Hung Wu
2019-05-18 10:33 ` Jonathan Cameron
2019-05-20 6:47 ` Chun-Hung Wu
2019-05-16 8:10 ` [PATCH 2/4] iio: adc: mediatek: mt6765 upstream driver Chun-Hung Wu
2019-05-18 10:33 ` Jonathan Cameron
2019-05-16 8:10 ` [PATCH 3/4] iio: adc: mediatek: SET_LATE_SYSTEM_SLEEP_PM_OPS support Chun-Hung Wu
2019-05-18 10:35 ` Jonathan Cameron
2019-05-20 6:03 ` Chun-Hung Wu
2019-05-22 16:28 ` Matthias Brugger
2019-05-28 10:59 ` Chun-Hung Wu [this message]
2019-06-06 15:46 ` Jonathan Cameron
2019-05-16 8:10 ` [PATCH 4/4] iio: auxadc: mediatek: change to subsys_initcall Chun-Hung Wu
2019-05-18 10:36 ` Jonathan Cameron
2019-05-20 6:06 ` Chun-Hung Wu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1559041196.12867.3.camel@mtkswgap22 \
--to=chun-hung.wu@mediatek.com \
--cc=devicetree@vger.kernel.org \
--cc=jg_poxu@mediatek.com \
--cc=jic23@kernel.org \
--cc=knaack.h@gmx.de \
--cc=kuohong.wang@mediatek.com \
--cc=lars@metafoo.de \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-iio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mediatek@lists.infradead.org \
--cc=mark.rutland@arm.com \
--cc=matthias.bgg@gmail.com \
--cc=peter.wang@mediatek.com \
--cc=pmeerw@pmeerw.net \
--cc=robh+dt@kernel.org \
--cc=stanley.chu@mediatek.com \
--cc=wsd_upstream@mediatek.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).