linux-kernel - Re: [PATCH 0/2] PCI: mvebu: add support for orion soc

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Date:   Wed, 20 Jul 2022 13:36:45 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Mauri Sandberg <maukka@....kapsi.fi>
Cc:     linux-pci <linux-pci@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Andrew Lunn <andrew@...n.ch>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Gregory CLEMENT <gregory.clement@...tlin.com>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Pali Rohár <pali@...nel.org>
Subject: Re: [PATCH 0/2] PCI: mvebu: add support for orion soc

On Mon, Jul 18, 2022 at 10:28 PM Mauri Sandberg <maukka@....kapsi.fi> wrote:
>
> Hello all!
>
> Working in close co-operation with Pali we made an initial attempt at bringing
> support for orion PCIe into mvebu PCIe driver. Currently the address of
> workaround memory range is hard coded and based on compatible string only. As
> Pali describes in another thread, we were not able to figure out what's the
> correct way to configure a configuration space. That discussion is here:
> https://lore.kernel.org/linux-pci/20220710225108.bgedria6igtqpz5l@pali/T/#u
>
> I tested this with D-Link DNS-323 rev A1 and it's working. As usual, all
> comments and feedback is welcome.

Hi Mauri,

I've managed to dig out my old series for reworking the orion5x PCI/PCIe
support, to the point where the two drivers are completely independent.

Please have a look at
https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/log/?h=orion-pci-cleanup

to see if this helps you at all. I see now that your DNS-323 only supports
PCIe but not PCI, so maybe it's not all that helpful for your machine,
but it should help for converting the other ones that do use legacy
PCI and want to base DT support on top of this work.

      Arnd