linux-kernel - Re: [RFC] experimental pci_register

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Message-ID: <20160502064757.GA27465@ulmo.ba.sec>
Date:	Mon, 2 May 2016 08:47:57 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Bjorn Helgaas <helgaas@...nel.org>, catalin.marinas@....com,
	linux-pci@...r.kernel.org, will.deacon@....com,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Tomasz Nowicki <tn@...ihalf.com>, ddaney@...iumnetworks.com,
	robert.richter@...iumnetworks.com, msalter@...hat.com,
	Liviu.Dudau@....com, jchandra@...adcom.com,
	linux-kernel@...r.kernel.org, hanjun.guo@...aro.org,
	Suravee.Suthikulpanit@....com
Subject: Re: [RFC] experimental pci_register_host API

On Sat, Apr 30, 2016 at 01:01:36AM +0200, Arnd Bergmann wrote:
> As mentioned in another thread, I have tried to come up with
> a way to make the PCI host driver registration more flexible
> and simpler.
> 
> We have actually discussed this multiple times in the past,
> but always ended up elsewhere, so this is a proof of concept
> work, leaving all the existing interfaces in place, and
> adding a way to allocate a pci_host_bridge structure from
> a driver and register that after filling out all the interesting
> fields.
> 
> This is not tested at all, and certainly not meant for
> inclusion until the concept has been discussed better.
> 
> Please have a look.

Hi Arnd,

I like this idea very much and welcome the timing. After the longer than
expected XUSB detour I was going to look at PCI next. Making the driver
work on both 32-bit and 64-bit ARM is the first thing that needs solving
but once that's in place it should be fairly trivial to add support for
Tegra X1 on top.

From a quick glance I think this series is a really good starting point.
I had a couple of questions, but I'll ask them as replies to each patch
for context.

Thierry

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