From mboxrd@z Thu Jan  1 00:00:00 1970
From: Darren Hart <dvhart@linux.intel.com>
Subject: Re: [RFC PATCH 8/9] Input: gpio_keys_polled - Make use of device
 property API
Date: Tue, 19 Aug 2014 10:21:34 -0500
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To: Mika Westerberg <mika.westerberg@linux.intel.com>, Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>, Al Stone <al.stone@linaro.org>, Olof Johansson <olof@lixom.net>, Matthew Garrett <matthew.garrett@nebula.com>, Matt Fleming <matt.fleming@intel.com>, David Woodhouse <dwmw2@infradead.org>, "H. Peter Anvin" <hpa@zytor.com>, Josh Triplett <josh@joshtriplett.org>, Aaron Lu <aaron.lu@intel.com>, Max Eliaser <max.eliaser@intel.com>, Robert Moore <robert.moore@intel.com>, Len Brown <lenb@kernel.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Linus Walleij <linus.walleij@linaro.org>, Alexandre Courbot <gnurou@gmail.com>, Mark Brown <broonie@linaro.org>, Dmitry Torokhov <dmitry.torokhov@gmail.com>, Bryan Wu <cooloney@gmail.com>, Richard Purdie <rpurdie@rpsys.net>, Samuel Ortiz <sameo@linux.intel.com>, Lee Jones <lee.jones@linaro.org>, Grant Likely <grant.likely@linaro.org>, Rob Herring <robh+dt@kernel.org>, linux-acpi@vge
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On 8/19/14, 4:27, "Mika Westerberg" <mika.westerberg@linux.intel.com>
wrote:

>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@linux.intel.com> wrote:
>> 
>> > From: Aaron Lu <aaron.lu@intel.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.
>

This is especially try for platform drivers such as this.

We will be creating subsystem types, "gpios", and defining them in the
_DSD Implementors Guide (per our discussion this morning at Kernel Summit).
-- 
Darren Hart					Open Source Technology Center
darren.hart@intel.com				            Intel Corporation