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

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Message-ID: <20120309124337.GW3273@opensource.wolfsonmicro.com>
Date:	Fri, 9 Mar 2012 12:43:37 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	MyungJoo Ham <myungjoo.ham@...il.com>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	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>,
	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 Fri, Mar 09, 2012 at 05:26:26PM +0900, MyungJoo Ham wrote:
> On Mon, Mar 5, 2012 at 9:07 PM, Mark Brown

> > The issue is the combination of the naming (h2w isn't very meaningful
> > and only works with a single jack) and the magic numbers used for
> > reporting state, plus the registration collisions.  Existing code can be
> > ported over fairly easily but it's got issues as an ABI which we'd want
> > to fix.

> The ABI of simply ported (only with API name changes) ex-switch extcon
> device won't be changed:

> Or, do you mean that extcon class should support not ex-swtich extcon
> device drivers such as adc-jack.c (not ported from oldies) to support
> "legacy" userspace application that is aware of only switch interface?

Neither of these, I mean that we'll probably want to do some updates to
the drivers as they go into mainline which will change their interface
beyond the simple s/switch/extcon/ change.

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