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

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Message-ID: <20170921084133.pptabevkolnwv2wy@dell>
Date:   Thu, 21 Sep 2017 09:41:33 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     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>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        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, 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?  Any reason you didn't send it to me?

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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