linux-kernel - Re: [PATCH 6/6] PCI: generic: Allow bus default MSI controller to be specified.

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Message-ID: <20150915175327.GM31157@arm.com>
Date:	Tue, 15 Sep 2015 18:53:27 +0100
From:	Will Deacon <will.deacon@....com>
To:	David Daney <ddaney.cavm@...il.com>
Cc:	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Frank Rowand <frowand.list@...il.com>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Pawel Moll <Pawel.Moll@....com>,
	Mark Rutland <Mark.Rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	David Daney <david.daney@...ium.com>,
	lorenzo.pieralisi@....com, marc.zyngier@....com
Subject: Re: [PATCH 6/6] PCI: generic: Allow bus default MSI controller to be
 specified.

On Sat, Sep 12, 2015 at 12:21:59AM +0100, David Daney wrote:
> From: David Daney <david.daney@...ium.com>
> 
> If the device tree node for the bus has a "msi-parent" property, use
> that as the default MSI controller for devices on the bus.  Add device
> tree binding documentation describing the new property.
> 
> This allows the pci-host-generic driver to be used in systems with
> multiple MSI controllers.
> 
> Signed-off-by: David Daney <david.daney@...ium.com>
> ---
>  .../devicetree/bindings/pci/host-generic-pci.txt          |  5 +++++
>  drivers/pci/host/pci-host-generic.c                       | 15 +++++++++++++--
>  2 files changed, 18 insertions(+), 2 deletions(-)

I don't think you need this anymore with 4.3-rc1. The core IRQ subsystem
should take care of parsing and configuring the MSI parents.

Will
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