From: Anton Vorontsov <avorontsov@ru.mvista.com>
To: Mingkai Hu <Mingkai.hu@freescale.com>
Cc: scottwood@freescale.com, linuxppc-dev@ozlabs.org
Subject: Re: [PATCH v1] Add support for getting device platform data to I2C device
Date: Thu, 18 Dec 2008 19:59:46 +0300 [thread overview]
Message-ID: <20081218165946.GA4029@oksana.dev.rtsoft.ru> (raw)
In-Reply-To: <1229566451-29411-1-git-send-email-Mingkai.hu@freescale.com>
On Thu, Dec 18, 2008 at 10:14:11AM +0800, Mingkai Hu wrote:
> There is no standard way of getting device platform data from
> dts file to the I2C device when it's probed. This patch adds
> a function pointer to the of_modalias_table to get such bindings
> properties into device's platform data.
Unfortunately this approach leads to inability to make the bindings
modular.
Note that distributions compile kernels with allmodconfig*, so the
kernel builds with all modules, but _all_ these bindings will be
kernel's built-ins. Given that these bindings are needed for every
not-so-trivial I2C (or SPI) driver, the approach doesn't seem to
scale good enough.
You can find more discussion on this matter in this huge thread:
http://lkml.org/lkml/2008/10/16/248
And the solution that everybody seem to agree with (SPI driver example):
http://lkml.org/lkml/2008/10/30/393
* Well, this is not quite true, but they're very close to allmodconfig.
--
Anton Vorontsov
email: cbouatmailru@gmail.com
irc://irc.freenode.net/bd2
next prev parent reply other threads:[~2008-12-18 16:59 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-18 2:14 [PATCH v1] Add support for getting device platform data to I2C device Mingkai Hu
2008-12-18 16:59 ` Anton Vorontsov [this message]
2008-12-18 17:20 ` Scott Wood
2008-12-18 17:49 ` Anton Vorontsov
2009-01-07 0:55 ` Benjamin Herrenschmidt
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