linux-kernel - Re: [PATCH 4/7] gpiolib: implement dev_gpiochip

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Message-Id: <1224642497.7654.319.camel@pasglop>
Date:	Wed, 22 Oct 2008 13:28:17 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	avorontsov@...mvista.com
Cc:	David Brownell <david-b@...bell.net>,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	i2c@...sensors.org, Jean Delvare <khali@...ux-fr.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH 4/7] gpiolib: implement dev_gpiochip_{add,remove} calls

On Wed, 2008-10-22 at 05:42 +0400, Anton Vorontsov wrote:
> 
> Thinking about it more, I started recalling other issues. The bus
> notifier chain doesn't replay previous events, so we also have to
> register the notifier before the _devices_ are registered. And this
> ruins the whole approach. :-/ Yeah, that's why I abandoned the bus
> notifier idea.

The notifier can be registered before the devices, though it's a little
bit fishy and fragile.

Easier I suppose to just have OF specific hooks in the bus code.

Ben.


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