linux-kernel - Re: [PATCH 3/4] arm64: Juno: Add support for the PCIe host bridge on Juno R1

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Message-ID: <40550712.xdsq5nNSTG@wuerfel>
Date:	Fri, 09 Oct 2015 17:49:18 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Mark Rutland <mark.rutland@....com>,
	Liviu Dudau <Liviu.Dudau@....com>,
	Jon Medhurst <tixy@...aro.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	linux-pci <linux-pci@...r.kernel.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Kumar Gala <galak@...eaurora.org>,
	Will Deacon <will.deacon@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	device-tree <devicetree@...r.kernel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Robin Murphy <robin.murphy@....com>
Subject: Re: [PATCH 3/4] arm64: Juno: Add support for the PCIe host bridge on Juno R1

On Friday 09 October 2015 16:44:08 Mark Rutland wrote:
> On Fri, Oct 09, 2015 at 03:11:07PM +0100, Liviu Dudau wrote:
> > On Fri, Oct 09, 2015 at 08:54:33AM -0500, Rob Herring wrote:
> > Or maybe I can claim the use of the string on account on being the first on arm64 
> > 
> > I can add a vendor prefix if you want, but pci-host-generic is going to ignore it 
> > *because* it is trying to be a generic driver.
> 
> The point here is to have the string ready if we need it later, so it's
> fine that it's not used currently.
> 
> Rob's suggestion is that the compatible list should look something like:
> 
> compatible = "arm,juno-r1-pcie", "plda,xpressrich3", "pci-host-ecam-generic";
> 
> We can match on "pci-host-ecam-generic" for now (and hopefully forever),
> but if for some reason we need to special-case this host controller (or
> Juno's integration thereof), we can do that based on the compatible
> string.

Sounds good to me, it certainly can't hurt.

	Arnd
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