linux-kernel - Re: [PATCH] pci: Add support for creating a generic host

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Message-ID: <20140213115327.GV26684@n2100.arm.linux.org.uk>
Date:	Thu, 13 Feb 2014 11:53:27 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linaro-kernel@...ts.linaro.org, devicetree@...r.kernel.org,
	'linux-pci' <linux-pci@...r.kernel.org>,
	Jingoo Han <jg1.han@...sung.com>,
	'LKML' <linux-kernel@...r.kernel.org>,
	'Tanmay Inamdar' <tinamdar@....com>,
	'Catalin Marinas' <Catalin.Marinas@....com>,
	'Bjorn Helgaas' <bhelgaas@...gle.com>,
	'LAKML' <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] pci: Add support for creating a generic host_bridge
	from device tree

On Thu, Feb 13, 2014 at 12:27:05PM +0100, Arnd Bergmann wrote:
> I would rather get rid of struct hw_pci for architecture independent
> drivers and add a different registration method on arm32 that is
> compatible with what we come up with on arm64. The main purpose of
> hw_pci is to allow multiple PCI controllers to be initialized at
> once, but we don't actually need that for any of the "modern" platforms
> where we already have a probe function that gets called once for
> each controller.

No.  The main purpose of hw_pci is as a container to support multiple
different platform specific PCI implementations in one kernel.  It's
exactly what you need for single zImage.

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