linux-kernel - Re: [RFC PATCH 0/3] introduce: Multistate Switch Class

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Date:	Thu, 1 Dec 2011 09:56:33 +1100
From:	NeilBrown <neilb@...e.de>
To:	MyungJoo Ham <myungjoo.ham@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Linus Walleij <linus.walleij@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	Mike Lockwood <lockwood@...roid.com>,
	Arve Hjønnevåg <arve@...roid.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Donggeun Kim <dg77.kim@...sung.com>, Greg KH <gregkh@...e.de>,
	Grant Likely <grant.likely@...retlab.ca>,
	Kalle Komierowski <karl.komierowski@...ricsson.com>,
	Johan PALSSON <johan.palsson@...ricsson.com>,
	Daniel WILLERUD <daniel.willerud@...ricsson.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: Re: [RFC PATCH 0/3] introduce: Multistate Switch Class

On Wed, 30 Nov 2011 15:40:48 +0900 MyungJoo Ham <myungjoo.ham@...il.com>
wrote:

> I'm focusing on an external connector or port that each physical port
> may inhabit multiple cables at a time although it should support a
> port that may inhabit a single cable only at a time. However, the
> class could be used for other general "multistate mux" that connects
> different device drivers.

Hi,
 maybe I'm just slow, but I'm having a lot of trouble imagining a single port
 that could have multiple cables plugged in at the same time.  And this
 blockage is stopping me from reflecting usefully on your other points.

 Are you able to show me a picture or a diagram or something so I can
 visualise what you are talking about?
 To me: once you plug one cable into a port, it is full and there is no room
 for any more cables.

Thanks,
NeilBrown

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