linux-kernel - Re: [PATCH 1/3 v2] GPIO: gpio-dwapb: Enable platform driver binding to MFD driver

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Date:	Fri, 05 Sep 2014 14:20:57 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	"Shevchenko, Andriy" <andriy.shevchenko@...el.com>
Cc:	"Chen, Alvin" <alvin.chen@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"Kweh, Hock Leong" <hock.leong.kweh@...el.com>,
	"sebastian@...akpoint.cc" <sebastian@...akpoint.cc>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"Ong, Boon Leong" <boon.leong.ong@...el.com>,
	"gnurou@...il.com" <gnurou@...il.com>,
	"linus.walleij@...aro.org" <linus.walleij@...aro.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	"Westerberg, Mika" <mika.westerberg@...el.com>,
	"dvhart@...ux.intel.com" <dvhart@...ux.intel.com>,
	"atull@...nsource.altera.com" <atull@...nsource.altera.com>
Subject: Re: [PATCH 1/3 v2] GPIO: gpio-dwapb: Enable platform driver binding to MFD driver

On Friday 05 September 2014 12:02:01 Shevchenko, Andriy wrote:
> > irq = irq_of_parse_and_map(node, 0);
> > If (!irq) {
> > pp->irq = -1;
> > return;
> > } else {
> > pp->irq = irq;
> > }
> > Then the code looks strange.
> > 
> > How do you think?
> 
> If I understood correctly you messed up with hwirq vs. virq.
> Otherwise you have mention that you are using virq everywhere (I guess
> you may rename the field in the structure), but in this case the field
> in the platform_data looks a bit strange.

The field in platform_data should be the mapped virtual irq number, it
makes no sense to use the hwirq unless you also add a pointer to the domain
in which that hwirq exists.

Also the output of irq_of_parse_and_map() is a mapped irq, as the name
suggests.

	Arnd
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