linux-kernel - Re: i2c: introduce i2c helper i2c_find_client_by

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Date:	Fri, 5 Jul 2013 20:55:12 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Bin Gao <bin.gao@...ux.intel.com>
Cc:	Wolfram Sang <wsa@...-dreams.de>, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: Re: i2c: introduce i2c helper i2c_find_client_by_name()

On Thu, Jun 06, 2013 at 11:33:46AM -0700, Bin Gao wrote:

> A good example is that an ISP(Imaging Signal Processor) driver needs
> register i2c camera sensor devices via v4l2, so it has to unregister
> all i2c clients that were previously registered by calling
> i2c_register_board_info(), and then re-register. For this case we
> can use this helper to get i2c_client by passing the client name.

Please look at the work that IIRC Laurent Pichart (CCed) was doing on
developing generic DT bindings for v4l in embedded systems, it sounds
like you're working on similar hardware here.  The general ideas should
apply to any enumeration mechanism, not just DT.

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