linux-kernel - Re: [PATCH v7 3/3] arm64: Add architecture support for PCI

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Message-Id: <201403201326.02377.arnd@arndb.de>
Date:	Thu, 20 Mar 2014 13:26:02 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Liviu Dudau <Liviu.Dudau@....com>
Cc:	Catalin Marinas <Catalin.Marinas@....com>,
	"linux-pci" <linux-pci@...r.kernel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Will Deacon <Will.Deacon@....com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	"linaro-kernel" <linaro-kernel@...ts.linaro.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	LAKML <linux-arm-kernel@...ts.infradead.org>,
	Tanmay Inamdar <tinamdar@....com>,
	Grant Likely <grant.likely@...retlab.ca>
Subject: Re: [PATCH v7 3/3] arm64: Add architecture support for PCI

On Thursday 20 March 2014, Liviu Dudau wrote:
> > I don't even understand why you want to create a generic pci_address_to_pio
> > implementation, when we don't need that for arm64 at all. Unless I'm
> > missing something important, that function is only called in case of
> > PCI_PROBE_DEVTREE with pci_of_scan on PowerPC. I don't expect any
> > architecture to do the same thing, and the only other architecture that
> > needs something like it (sparc) has a different implementation.
> 
> Because in my [v7 2/6]* patch for the generic host bridge support I start
> using pci_address_to_pio to fix the conversion of PCI ranges to resources.
> That requires an arm64 (or more correctly, an arch with memory mapped IO
> specific) version of pci_address_to_pio().

Yes, but why do you use it there?

	Arnd
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