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

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Message-ID: <CACK8Z6GmwC_YHhqRqpa6DNZt0e+BFHsARM8gBe5x-iWaZL1pgA@mail.gmail.com>
Date:   Wed, 20 Sep 2017 18:14:50 -0700
From:   Rajat Jain <rajatja@...gle.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     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>,
        Lee Jones <lee.jones@...aro.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 Shaikh <furquan@...gle.com>,
        Rajat Jain <rajatxjain@...il.com>
Subject: Re: [PATCH 2/2] mfd: intel-lpss: switch to suspend_late()/resume_early()

On Wed, Sep 20, 2017 at 5:27 PM, Rafael J. Wysocki <rafael@...nel.org> 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/

Sorry, I missed it. Please consider my patch withdrawn / self-nack'ed
in favor of Rafael's patch.

>
> Thanks,
> Rafael