linux-kernel - Re: [PATCH 1/2] Initial support for Allwinner's Security ID fuses

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Date:	Wed, 26 Jun 2013 10:10:33 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	Oliver Schinagl <oliver+list@...inagl.nl>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	arnd@...db.de, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, andy.shevchenko@...il.com,
	linus.walleij@...aro.org, linux-sunxi@...glegroups.com,
	Oliver Schinagl <oliver@...inagl.nl>
Subject: Re: [PATCH 1/2] Initial support for Allwinner's Security ID fuses

On Mon, Jun 24, 2013 at 02:46:15PM -0700, Greg KH wrote:
> Stick with a binary attribute, and attach that to the proper class
> structure and all should be fine.
> 
> Ah crap, you're using a platform device.
> 
> {sigh}
> 
> Why?  Why not use a "real" device which has a "real" class, and then use
> the interfaces there?

And why aren't platform devices "real" devices?  If platform devices are
second class devices then that's pretty crap because virtually all
devices on ARM are platform devices, not something like "first class"
PCI devices.

We could make them PCI devices if you want us to totally fsck with the
PCI code to bend it in ways it was never meant to, but I suspect that'll
upset the PCI guys.

No, platform devices must be first class devices just like any other.
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