linux-kernel - Re: [PATCH v2 1/5] mfd: mt6397: create irq mappings in mfd core driver

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Date:   Tue, 8 Aug 2017 17:09:55 +0800
From:   Chen Zhong <chen.zhong@...iatek.com>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:     Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Lee Jones <lee.jones@...aro.org>,
        Eddie Huang <eddie.huang@...iatek.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Jaechul Lee <jcsing.lee@...sung.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Javier Martinez Canillas <javier@....samsung.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Beomho Seo <beomho.seo@...sung.com>,
        <linux-input@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-rtc@...r.kernel.org>
Subject: Re: [PATCH v2 1/5] mfd: mt6397: create irq mappings in mfd core
 driver

On Mon, 2017-08-07 at 19:53 -0700, Dmitry Torokhov wrote:
> On Mon, Aug 07, 2017 at 11:32:44PM +0200, Alexandre Belloni wrote:
> > On 07/08/2017 at 09:57:41 +0800, Chen Zhong wrote:
> > > The core driver should create and manage irq mappings instead of
> > > leaf drivers. This patch change to pass irq domain to
> > > devm_mfd_add_devices() and it will create mapping for irq resources
> > > automatically. And remove irq mapping in rtc driver since this has
> > > been done in core driver.
> > > 
> > > Signed-off-by: Chen Zhong <chen.zhong@...iatek.com>
> > 
> > For the RTC part:
> > Acked-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
> > 
> > > ---
> > >  drivers/mfd/mt6397-core.c |    4 ++--
> > >  drivers/rtc/rtc-mt6397.c  |    2 +-
> > >  2 files changed, 3 insertions(+), 3 deletions(-)
> > > 
> > > diff --git a/drivers/mfd/mt6397-core.c b/drivers/mfd/mt6397-core.c
> > > index 04a601f..6546d7f 100644
> > > --- a/drivers/mfd/mt6397-core.c
> > > +++ b/drivers/mfd/mt6397-core.c
> > > @@ -289,7 +289,7 @@ static int mt6397_probe(struct platform_device *pdev)
> > >  
> > >  		ret = devm_mfd_add_devices(&pdev->dev, -1, mt6323_devs,
> > >  					   ARRAY_SIZE(mt6323_devs), NULL,
> > > -					   0, NULL);
> > > +					   0, pmic->irq_domain);
> > >  		break;
> > >  
> > >  	case MT6397_CID_CODE:
> > > @@ -304,7 +304,7 @@ static int mt6397_probe(struct platform_device *pdev)
> > >  
> > >  		ret = devm_mfd_add_devices(&pdev->dev, -1, mt6397_devs,
> > >  					   ARRAY_SIZE(mt6397_devs), NULL,
> > > -					   0, NULL);
> > > +					   0, pmic->irq_domain);
> > >  		break;
> > >  
> > >  	default:
> > > diff --git a/drivers/rtc/rtc-mt6397.c b/drivers/rtc/rtc-mt6397.c
> > > index 1a61fa5..22c52f7 100644
> > > --- a/drivers/rtc/rtc-mt6397.c
> > > +++ b/drivers/rtc/rtc-mt6397.c
> > > @@ -323,7 +323,7 @@ static int mtk_rtc_probe(struct platform_device *pdev)
> > >  	rtc->addr_base = res->start;
> > >  
> > >  	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
> > > -	rtc->irq = irq_create_mapping(mt6397_chip->irq_domain, res->start);
> > > +	rtc->irq = res->start;
> 
> Why not
> 
> 	rtc->irq = platform_get_irq(pdev, 0);
> 	if (rtc->irq < 0)
> 		return rtc->irq;
> ?
> 
> This way you propagate error properly.
> 
> Thanks.
> 

Hi Dmitry,

	I'll modify it to get irq number via this way.

Thank you.