linux-kernel - Re: arm qemu test failures due to 'driver-core: platform: probe of-devices only using list of compatibles'

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Message-ID: <20160215081750.GD12289@pengutronix.de>
Date:	Mon, 15 Feb 2016 09:17:50 +0100
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Guenter Roeck <linux@...ck-us.net>
Subject: Re: arm qemu test failures due to 'driver-core: platform: probe
 of-devices only using list of compatibles'

Hello Russell,

On Sun, Feb 14, 2016 at 08:07:55PM +0000, Russell King - ARM Linux wrote:
> On Sun, Feb 14, 2016 at 08:55:01PM +0100, Uwe Kleine-König wrote:
> > So the unexpected abnormality here is that even though this device is
> > instantiated by dt, the driver doesn't provide any compatibles.
> > Either my expectation is wrong, then 67d02a1bbb33455 should be reverted
> 
> Your expectation is wrong.  AMBA primecell devices have hardware IDs
> and are matched to their drivers by those IDs.  Just like PCI.

pci devices don't appear in dt, do they? I don't see the connection
between amba devices and platform devices, see my other mail in this
thread for some more details.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |