linux-kernel - RE: [PATCH 1/4 v3] GPIO: gpio-dwapb: Enable platform driver binding to MFD driver

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Date:	Wed, 10 Sep 2014 00:34:50 +0000
From:	"Chen, Alvin" <alvin.chen@...el.com>
To:	Darren Hart <dvhart@...radead.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Alexandre Courbot <gnurou@...il.com>,
	"Grant Likely" <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	atull <atull@...nsource.altera.com>,
	"Shevchenko, Andriy" <andriy.shevchenko@...el.com>
CC:	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"Ong, Boon Leong" <boon.leong.ong@...el.com>,
	"Kweh, Hock Leong" <hock.leong.kweh@...el.com>,
	Sebastian Andrzej Siewior <sebastian@...akpoint.cc>,
	"Westerberg, Mika" <mika.westerberg@...el.com>,
	"Shevchenko, Andriy" <andriy.shevchenko@...el.com>,
	Arnd Bergmann <arnd@...db.de>
Subject: RE: [PATCH 1/4 v3] GPIO: gpio-dwapb: Enable platform driver binding
 to MFD driver

> >@@ -136,7 +136,6 @@ config GPIO_DWAPB
> > 	tristate "Synopsys DesignWare APB GPIO driver"
> > 	select GPIO_GENERIC
> > 	select GENERIC_IRQ_CHIP
> >-	depends on OF_GPIO
> 
> You cover this specific dependencies with inline ifdefs, but you lose the
> CONFIG_OF depends by dropping it, and there are no such checks in the probe
> routine. Assumptions of OF are not limited to probe in this driver.
> 
> While I would like to see this assumption properly abstracted, the most
> expedient/immediate fix is probably to add a depends on OF above.

Andriy, how do you think? 

How about 
depends on OF_GPIO || MFD_GPIO_DWAPB, or
depends on OF_GPIO || MFD_INTEL_QUARK_I2C_GPIO?


> --
> Darren
> Intel Open Source Technology Center
> 

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