linux-kernel - Re: [2.6 patch] some overdue I2C driver removal

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Message-ID: <20071128173022.GD2308@csclub.uwaterloo.ca>
Date:	Wed, 28 Nov 2007 12:30:22 -0500
From:	lsorense@...lub.uwaterloo.ca (Lennart Sorensen)
To:	Jean Delvare <khali@...ux-fr.org>
Cc:	Adrian Bunk <bunk@...nel.org>, i2c@...sensors.org,
	linux-kernel@...r.kernel.org,
	Lennert Buytenhek <buytenh@...tstofly.org>,
	Russell King <rmk+kernel@....linux.org.uk>
Subject: Re: [2.6 patch] some overdue I2C driver removal

On Wed, Nov 28, 2007 at 11:23:57AM +0100, Jean Delvare wrote:
> There's no driver to write (i2c-gpio is the driver). Instead, the
> scx200 platform needs to implement the standard GPIO API. I don't think
> that it has happened yet, and last time this was discussed, someone
> (can't remember who, sorry), complained that the GPIO API "sucked" and
> that the scx200 platform would not be updated to use it. I didn't buy
> the claim due to a lack of argumentation and the fact that the GPIO
> infrastructure seems to work well enough for many other platforms.
> 
> As far as I can see, the ixp2000 platform also doesn't implement the
> standard GPIO API yet, so of the 3 drivers that are about to be
> removed, only i2c-ixp4xx can be removed without functionality loss at
> the moment. Lennert, Russell, are there any plans to convert the
> ixp2000 platform to use the generic GPIO layer?
> 
> Maybe I shouldn't have added this entry in feature-removal-schedule.txt
> in the first place: these drivers should ideally be dropped in favor of
> i2c-gpio, but it can only happen for platforms that implement the
> standard GPIO API. As I am not the one who will convert these
> platforms, and some of them might as well never be converted (I don't
> know how active they are nowadays), there's not much I can do.

Well if I get a chance I might try to do it for the scx200 at some point
(since I do use it) although given the current i2c driver works just
fine and I have no need for the rest of the gpio lines what so ever
there isn't that much insentive to do so yet.

Removing the existing i2c driver would seem like a mistake at this time
though.

--
Len Sorensen
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