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

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Date:	Fri, 12 Jul 2013 13:35:51 +0200
From:	Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:	Andy Shevchenko <andy.shevchenko@...il.com>
Cc:	Wolfram Sang <wsa@...-dreams.de>, Mark Brown <broonie@...nel.org>,
	Bin Gao <bin.gao@...ux.intel.com>, linux-i2c@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: i2c: introduce i2c helper i2c_find_client_by_name()

Hi Andy,

On Friday 12 July 2013 14:29:16 Andy Shevchenko wrote:
> On Fri, Jul 12, 2013 at 2:00 PM, Wolfram Sang <wsa@...-dreams.de> wrote:
> >> Briefly looking into ACPI tables we have and mechanisms that we can
> >> use in ACPI case, I doubt we may apply all the ideas, probably some of
> >> them, though I didn't get yet where to read about in details. What I
> >> could say now is that the patch provided by Bin Gao is definitely no
> >> go.
> > 
> > Laurent explained to me what V4L did and now does. It used to be the way
> > tha V4L drivers did register I2C slaves according to platform_data. Now,
> > with DT the slaves get instanciated earlier, so they now use notifiers
> > to know when the slaves are in place. Something like this should
> > probably be done here, too, instead of unregistering and re-registering.
> 
> Yes, seems right way to go.
> I think ACPI case can use V4L2 async API somehow, though it has its
> own event model.
> I'll talk to Sakari Ailus to sync.

Do you have any pointer to the relevant parts of the ACPI specification ?

-- 
Regards,

Laurent Pinchart

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