Re: [PATCH 3/6] rtc: da9063: Use dev_err_probe()

From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: Biju Das <biju.das.jz@bp.renesas.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>,
	Alessandro Zummo <a.zummo@towertech.it>,
	Support Opensource <support.opensource@diasemi.com>,
	"linux-rtc@vger.kernel.org" <linux-rtc@vger.kernel.org>,
	Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@bp.renesas.com>,
	"biju.das.au" <biju.das.au@gmail.com>,
	"linux-renesas-soc@vger.kernel.org"
	<linux-renesas-soc@vger.kernel.org>
Subject: Re: [PATCH 3/6] rtc: da9063: Use dev_err_probe()
Date: Fri, 1 Dec 2023 16:20:10 +0100	[thread overview]
Message-ID: <202312011520103c5f28dc@mail.local> (raw)
In-Reply-To: <TYVPR01MB112796ACC50655F7C107420B58681A@TYVPR01MB11279.jpnprd01.prod.outlook.com>

On 01/12/2023 13:30:05+0000, Biju Das wrote:
> Hi Geert,
> 
> Thanks for the feedback.
> 
> > -----Original Message-----
> > From: Geert Uytterhoeven <geert@linux-m68k.org>
> > Subject: Re: [PATCH 3/6] rtc: da9063: Use dev_err_probe()
> > 
> > Hi Biju,
> > 
> > On Fri, Dec 1, 2023 at 12:08 PM Biju Das <biju.das.jz@bp.renesas.com>
> > wrote:
> > > Replace dev_err()->dev_err_probe() to simpilfy probe().
> > >
> > > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> > 
> > Thanks for your patch!
> > 
> > > --- a/drivers/rtc/rtc-da9063.c
> > > +++ b/drivers/rtc/rtc-da9063.c
> > > @@ -488,8 +480,9 @@ static int da9063_rtc_probe(struct platform_device
> > *pdev)
> > >                                                 IRQF_TRIGGER_LOW |
> > IRQF_ONESHOT,
> > >                                                 "ALARM", rtc);
> > >                 if (ret)
> > > -                       dev_err(&pdev->dev, "Failed to request ALARM
> > IRQ %d: %d\n",
> > > -                               irq_alarm, ret);
> > > +                       return dev_err_probe(&pdev->dev, ret,
> > > +                                            "Failed to request ALARM
> > IRQ %d\n",
> > > +                                            irq_alarm);
> > 
> > This changes behavior: before, this was not considered fatal.
> 
> Agreed. Maybe a separate patch?
> 
> if there is no irqhandler on platform with IRQ populated nothing will work,
> RTC won't work as "rtc_update_irq " updated in irq handler.
> I think it is a fatal condition.

This is not true, an RTC can wake up a system without an IRQ.

> 
> Cheers,
> Biju
> 
> > 
> > >
> > >                 ret = dev_pm_set_wake_irq(&pdev->dev, irq_alarm);
> > >                 if (ret)
> > 
> > The rest LGTM, so with the above fixed/clarified:
> > Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> > 
> > Gr{oetje,eeting}s,
> > 
> >                         Geert
> > 
> > --
> > Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-
> > m68k.org
> > 
> > In personal conversations with technical people, I call myself a hacker.
> > But when I'm talking to journalists I just say "programmer" or something
> > like that.
> >                                 -- Linus Torvalds

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com