RE: [PATCH] rtc: snvs: Use __maybe_unused instead of #if CONFIG_PM_SLEEP

[Anson Huang]

Hi, Trent

> -----Original Message-----
> From: Trent Piepho [mailto:tpie...@impinj.com]
> Sent: Tuesday, April 30, 2019 1:13 AM
> To: linux-...@vger.kernel.org; Anson Huang <anson.hu...@nxp.com>;
> a.zu...@towertech.it; linux-kernel@vger.kernel.org;
> alexandre.bell...@bootlin.com
> Cc: dl-linux-imx <linux-...@nxp.com>
> Subject: Re: [PATCH] rtc: snvs: Use __maybe_unused instead of #if
> CONFIG_PM_SLEEP
> 
> On Mon, 2019-04-29 at 07:02 +0000, Anson Huang wrote:
> > Use __maybe_unused for power management related functions instead of
> > #if CONFIG_PM_SLEEP to simply the code.
> >
> > Signed-off-by: Anson Huang <anson.hu...@nxp.com>
> 
> This will result in the functions always being included, even if PM_SLEEP is
> off...
> 
> >
> > @@ -387,14 +385,6 @@ static const struct dev_pm_ops snvs_rtc_pm_ops
> = {
> >     .resume_noirq = snvs_rtc_resume_noirq,  };
> 
> ...because they will always be used by the definition of snvs_rtc_pm_ops
> here.

You are right, I missed this part, have sent out V2 patch with 
SET_NOIRQ_SYSTEM_SLEEP_PM_OPS() used to define the ops, please help review.

Thanks,
Anson.

> 
> In order for this to work, SIMPLE_DEV_PM_OPS() needs to be used, so that
> the dev_pm_ops struct is empty when PM is off and the functions don't get
> referenced. See:
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