linux-kernel - Re: [PATCH 3/3] pinctrl: exynos: ack level-triggered interrupts before unmasking

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Message-ID: <4661065.SXhmWQNl5M@flatron>
Date:	Thu, 13 Jun 2013 18:42:17 +0200
From:	Tomasz Figa <tomasz.figa@...il.com>
To:	Doug Anderson <dianders@...omium.org>
Cc:	Kukjin Kim <kgene.kim@...sung.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Olof Johansson <olof@...om.net>,
	Simon Glass <sjg@...omium.org>,
	Luigi Semenzato <semenzato@...omium.org>,
	Ilho Lee <ilho215.lee@...sung.com>,
	김은기 <eunki_kim@...sung.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>
Subject: Re: [PATCH 3/3] pinctrl: exynos: ack level-triggered interrupts before unmasking

On Thursday 13 of June 2013 09:38:33 Doug Anderson wrote:
> Kukjin,
> 
> On Thu, Jun 13, 2013 at 5:04 AM, Kukjin Kim <kgene.kim@...sung.com> 
wrote:
> > Doug Anderson wrote:
> >> A level-triggered interrupt should be acked after the interrupt line
> >> becomes inactive and before it is unmasked, or else another interrupt
> >> will be immediately triggered.  Acking before or after calling the
> >> handler is not enough.
> >> 
> >> Signed-off-by: Luigi Semenzato <semenzato@...omium.org>
> >> Signed-off-by: Doug Anderson <dianders@...omium.org>
> > 
> > BTW, probably we need a similar fixing in the mach-exynos/common.c
> > file
> > before pinct기 for distro...
> 
> Is anyone using the functions in mach-exynos/common.c file anymore?  I
> thought that non-dt exynos support was going away and then we could
> just delete a whole lot of code from that file.

I think Kukjin meant stable kernels that support Exynos boards using board 
files and without pinctrl. Would make sense to have them fixed as well, I 
guess.

Best regards,
Tomasz

> 
> -Doug
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