linux-kernel - Re: [RFC PATCH 8/9] Input: gpio_keys_polled

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Message-ID: <20140819092753.GI1660@lahna.fi.intel.com>
Date:	Tue, 19 Aug 2014 12:27:53 +0300
From:	Mika Westerberg <mika.westerberg@...ux.intel.com>
To:	Jacob Pan <jacob.jun.pan@...ux.intel.com>
Cc:	Darren Hart <dvhart@...ux.intel.com>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Al Stone <al.stone@...aro.org>,
	Olof Johansson <olof@...om.net>,
	Matthew Garrett <matthew.garrett@...ula.com>,
	Matt Fleming <matt.fleming@...el.com>,
	David Woodhouse <dwmw2@...radead.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Josh Triplett <josh@...htriplett.org>,
	Aaron Lu <aaron.lu@...el.com>,
	Max Eliaser <max.eliaser@...el.com>,
	Robert Moore <robert.moore@...el.com>,
	Len Brown <lenb@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Mark Brown <broonie@...aro.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Bryan Wu <cooloney@...il.com>,
	Richard Purdie <rpurdie@...ys.net>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>, linux-acpi@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 8/9] Input: gpio_keys_polled - Make use of device
 property API

On Mon, Aug 18, 2014 at 10:55:12AM -0700, Jacob Pan wrote:
> On Sat, 16 Aug 2014 09:53:58 +0300
> Mika Westerberg <mika.westerberg@...ux.intel.com> wrote:
> 
> > From: Aaron Lu <aaron.lu@...el.com>
> > 
> > Make use of device property API in this driver so that both OF based
> > system and ACPI based system can use this driver.
> > 
> Do we always assume OF and ACPI _DSD will have the same property name
> strings? i.e. in this patch "gpios"
> > +	if (device_property_get(dev, "gpios", NULL)) {
> > -		if (!of_find_property(pp, "gpios", NULL)) {
> 
> Maybe i missed something, but I don't think we can make that assumption
> in BIOS. If not, what is the point of having unified interface?

We recommend that when it makes sense, the property names in _DSD follow
the corresponding DT names.
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