linux-kernel - Re: [PATCH 4/7] ECHI Platform: Merge ppc-of EHCI driver into the ehci-platform driver

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Date:	Fri, 21 Feb 2014 10:41:50 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Alistair Popple <alistair@...ple.id.au>
cc:	gregkh@...uxfoundation.org, <linux-usb@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH 4/7] ECHI Platform: Merge ppc-of EHCI driver into the
 ehci-platform driver

On Fri, 21 Feb 2014, Alistair Popple wrote:

> Currently the ppc-of driver uses the compatibility string
> "usb-ehci". This means platforms that use device-tree and implement an
> EHCI compatible interface have to either use the ppc-of driver or add
> a compatible line to the ehci-platform driver. It would be more
> appropriate for the platform driver to be compatible with "usb-ehci"
> as non-powerpc platforms are also beginning to utilise device-tree.
> 
> This patch merges the device tree property parsing from ehci-ppc-of
> into the platform driver and adds a "usb-ehci" compatibility
> string. The existing ehci-ppc-of driver is removed and the 440EPX
> specific quirks are added to the ehci-platform driver.
> 
> Signed-off-by: Alistair Popple <alistair@...ple.id.au>

This patch is also out of date.  The compatibility string used by the 
ehci-platform driver is "generic-ehci".

There remains the question of whether to merge ehci-ppc-of into
ehci-platform.  This would be a rather invasive change, but I suppose
we could do it.  With adjustments along the lines suggested by Mark
Rutland.

Alan Stern

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