linux-kernel - Re: [PULL-REQUEST] EXTCON Patches (Re: [PATCH v6 0/5] Introduce External Connector Class (extcon))

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Message-ID: <CAJ0PZbQ9iTO+CqNLyAYiRFq8BqZXoyLfBFGvw78k53C+4yLY=w@mail.gmail.com>
Date:	Wed, 29 Feb 2012 10:57:48 +0900
From:	MyungJoo Ham <myungjoo.ham@...il.com>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	Arnd Bergmann <arnd@...db.de>, LKML <linux-kernel@...r.kernel.org>,
	NeilBrown <neilb@...e.de>, Randy Dunlap <rdunlap@...otime.net>,
	Mike Lockwood <lockwood@...roid.com>,
	Arve Hjønnevag <arve@...roid.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Morten CHRISTIANSEN <morten.christiansen@...ricsson.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	John Stultz <john.stultz@...aro.org>,
	Joerg Roedel <joerg.roedel@....com>
Subject: Re: [PULL-REQUEST] EXTCON Patches (Re: [PATCH v6 0/5] Introduce
 External Connector Class (extcon))

On Wed, Feb 29, 2012 at 1:44 AM, Greg KH <gregkh@...uxfoundation.org> wrote:
> On Tue, Feb 28, 2012 at 05:58:02PM +0900, MyungJoo Ham wrote:
>> Hello Arnd,
>>
>>
>> Presuming that the requests and comments upto v5 patchsets were
>> addressed in the last patchset (v6), here goes a pull request of
>> Extcon.
>
> Wait, please, before this code can be accepted, I would like to get
> verification that you have also made the needed changes to the Android
> userspace side of this interface, and that the code works there, and it
> is on its way to be included in the main Android repo.
>
> Is this true?  If not, what is the plans for this to happen?  Without
> that happening, I don't think this code can be accepted, do you?
>
> thanks,
>
> greg k-h

When an extcon device driver is not using the extended features
(multistate & mutually-exclusiveness) and CONFIG_ANDROID is on, the
userspace interface is same as the Android kernel's switch class (name
and state ABI, which were read-only in Android kernel).

If an extcon device drivers uses the extended features (multistate &
mutually-exclusiveness) by adding "cable names", the state ABI will
provided information in different format. Besides, Android kernel's
switch device driver cannot provide the extended feature anyway.


Thanks.


Cheers!
MyungJoo.
-- 
MyungJoo Ham, Ph.D.
System S/W Lab, S/W Center, Samsung Electronics
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