linux-kernel - Re: [PATCH v3 0/7] PCI: mvebu: add support for orion soc

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Date:   Fri, 11 Nov 2022 13:49:57 +0100
From:   Lorenzo Pieralisi <lpieralisi@...nel.org>
To:     Pali Rohár <pali@...nel.org>
Cc:     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 <linux@...linux.org.uk>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Mauri Sandberg <maukka@....kapsi.fi>,
        linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 0/7] PCI: mvebu: add support for orion soc

On Mon, Nov 07, 2022 at 12:28:24AM +0100, Pali Rohár wrote:
> On Thursday 27 October 2022 16:10:48 Lorenzo Pieralisi wrote:
> > On Mon, Sep 05, 2022 at 09:23:03PM +0200, Pali Rohár wrote:
> > > Hello! This patch series add support for Orion PCIe controller into
> > > pci-mvebu.c driver. V3 version has completely rewritten pci-mvebu.c code
> > > to parse all physical addresses from device tree files according to
> > > mvebu-pci.txt documentation, allow access to all extended PCIe config
> > > space registers and use modern kernel API pci_remap_cfgspace() and
> > > mvebu_mbus_add_window_by_id() fir mapping PCIe config space.
> > > 
> > > Most of Marvell device tree code in pci-mvebu.c is giant magic, but it was
> > > there because this change and it is de-facto API between dts files and
> > > kernel used for a long time. Note that it is misused according to PCI
> > > device tree bindings, but we have to follow this Marvell bindings to do
> > > not introduce backward incompatibility issues for other non-Orion
> > > platforms.
> > > 
> > > Mauri tested these changes on DNS323 board with both DT and non-DT builds.
> > > PCIe AER is working too (one of the feature which proved that access to
> > > extended PCIe config registers is working fine).
> > > 
> > > After this patch is accepted we are planning to look at existing Orion
> > > arch specific code and covert it to use this new DT based pci-mvebu.c
> > > code. Later this would allow to kill arch specific Orion PCIe code,
> > > which is in arch/arm/plat-orion/pcie.c and parts also in file
> > > arch/arm/mach-orion5x/pci.c (shared with old-PCI bus code).
> > > 
> > > This patch series depends on another patches:
> > > https://lore.kernel.org/linux-pci/20220524122817.7199-1-pali@kernel.org/
> > > https://lore.kernel.org/linux-pci/20220817230036.817-3-pali@kernel.org/
> > 
> > Can this series be rebased please on top of v6.1-rc1 so that we can merge it ?
> 
> IIRC above two dependent patches still applies on master branch and this
> patch series applies on above two dependent patches.

Which I can't merge for reasons you are aware of already.

So, does this series _really_ depend on the two patches above ?

I don't think so but let me ask again.

Lorenzo

> > Thanks,
> > Lorenzo
> > 
> > > Mauri Sandberg (2):
> > >   bus: mvebu-mbus: add configuration space aperture
> > >   dt-bindings: PCI: mvebu: Add orion5x compatible
> > > 
> > > Pali Rohár (5):
> > >   ARM: orion: Move PCIe mbus window mapping from orion5x_setup_wins() to
> > >     pcie_setup()
> > >   PCI: mvebu: Remove unused busn member
> > >   PCI: mvebu: Cleanup error handling in mvebu_pcie_probe()
> > >   PCI: mvebu: Add support for Orion PCIe controller
> > >   ARM: dts: orion5x: Add PCIe node
> > > 
> > >  .../devicetree/bindings/pci/mvebu-pci.txt     |   4 +-
> > >  arch/arm/boot/dts/orion5x.dtsi                |  51 +++++
> > >  arch/arm/mach-orion5x/common.c                |  13 --
> > >  arch/arm/mach-orion5x/pci.c                   |  14 ++
> > >  drivers/bus/mvebu-mbus.c                      |  26 ++-
> > >  drivers/pci/controller/Kconfig                |   4 +-
> > >  drivers/pci/controller/pci-mvebu.c            | 202 ++++++++++++++----
> > >  include/linux/mbus.h                          |   1 +
> > >  8 files changed, 256 insertions(+), 59 deletions(-)
> > > 
> > > -- 
> > > 2.20.1
> > > 
> > > 
> > > _______________________________________________
> > > linux-arm-kernel mailing list
> > > linux-arm-kernel@...ts.infradead.org
> > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> 
> _______________________________________________
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> linux-arm-kernel@...ts.infradead.org
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