linux-kernel - Re: [PATCH 2/2] mfd: intel-lpss: switch to suspend_late()/resume

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Date:   Thu, 21 Sep 2017 17:18:56 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Rajat Jain <rajatja@...gle.com>,
        Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        linux-i2c <linux-i2c@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
        Linux PM <linux-pm@...r.kernel.org>,
        Len Brown <len.brown@...el.com>, furquan@...gle.com,
        rajatxjain@...il.com
Subject: Re: [PATCH 2/2] mfd: intel-lpss: switch to suspend_late()/resume_early()

On Thu, Sep 21, 2017 at 5:17 PM, Lee Jones <lee.jones@...aro.org> wrote:
> On Thu, 21 Sep 2017, Rafael J. Wysocki wrote:
>
>> On Thursday, September 21, 2017 10:41:33 AM CEST Lee Jones wrote:
>> > On Thu, 21 Sep 2017, Rafael J. Wysocki wrote:
>> >
>> > > On Thu, Sep 21, 2017 at 12:31 AM, Rajat Jain <rajatja@...gle.com> wrote:
>> > > > Ref: https://lkml.org/lkml/2017/9/19/649
>> > > >
>> > > > The intel-lpss hosts the designware i2c controller device, which
>> > > > needs to be up and running until all its i2c child devices have
>> > > > suspended (child devices need to be accessible over i2c until
>> > > > suspend_late() has been called for all those devices).
>> > > >
>> > > > So lets delay the resetting of the controller until suspend_late().
>> > > > I thought of renaming function to say *_late / *_early but that
>> > > > might cause confusion since the same function is also used for runtime
>> > > > suspend/resume.
>> > > >
>> > > > Fixes: 0b471aaa0e1a ("Put I2C and SPI controllers into reset state on suspend")
>> > > > Signed-off-by: Rajat Jain <rajatja@...gle.com>
>> > > > ---
>> > > >  drivers/mfd/intel-lpss.h | 7 +------
>> > > >  1 file changed, 1 insertion(+), 6 deletions(-)
>> > > >
>> > > > diff --git a/drivers/mfd/intel-lpss.h b/drivers/mfd/intel-lpss.h
>> > > > index 694116630ffa..865bbeaaf00c 100644
>> > > > --- a/drivers/mfd/intel-lpss.h
>> > > > +++ b/drivers/mfd/intel-lpss.h
>> > > > @@ -38,12 +38,7 @@ int intel_lpss_resume(struct device *dev);
>> > > >  #ifdef CONFIG_PM_SLEEP
>> > > >  #define INTEL_LPSS_SLEEP_PM_OPS                        \
>> > > >         .prepare = intel_lpss_prepare,          \
>> > > > -       .suspend = intel_lpss_suspend,          \
>> > > > -       .resume = intel_lpss_resume,            \
>> > > > -       .freeze = intel_lpss_suspend,           \
>> > > > -       .thaw = intel_lpss_resume,              \
>> > > > -       .poweroff = intel_lpss_suspend,         \
>> > > > -       .restore = intel_lpss_resume,
>> > > > +       SET_LATE_SYSTEM_SLEEP_PM_OPS(intel_lpss_suspend, intel_lpss_resume)
>> > > >  #else
>> > > >  #define INTEL_LPSS_SLEEP_PM_OPS
>> > > >  #endif
>> > >
>> > > So I sent this exact patch several days ago:
>> > > https://patchwork.kernel.org/patch/9939809/
>> >
>> > You did?
>>
>> Yes, I did.
>>
>> > Any reason you didn't send it to me?
>>
>> Well, Lee Jones <lee@...nel.org> is very much in the CC list of it.
>>
>> Was I expected to use a different e-mail address for that?
>
> I don't monitor that one.  Better to use the one in MAINTAINERS.

OK, I will in the future.