From: Rob Herring <robherring2@gmail.com>
To: monstr@monstr.eu
Cc: linux-pci@vger.kernel.org, devicetree-discuss@lists.ozlabs.org,
Rob Herring <rob.herring@calxeda.com>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Subject: Re: pci and pcie device-tree binding - range No cells
Date: Mon, 10 Dec 2012 08:26:37 -0600 [thread overview]
Message-ID: <50C5F11D.9060006@gmail.com> (raw)
In-Reply-To: <50C5D387.90908@monstr.eu>
On 12/10/2012 06:20 AM, Michal Simek wrote:
> Hi Grant and others,
>
> I have a question regarding number of cells in ranges property
> for pci and pcie nodes.
>
> Linux pci/pcie powerpc DTSes contain 7 cells (xpedite5370.dts,
> sequoia.dts, etc)
> but also 6 cells format too (mpc832x_mds.dts)
>
> Here is shown 6 cells ranges format and describe
> http://devicetree.org/Device_Tree_Usage#PCI_Host_Bridge
>
> And also in documentation in the linux
> Documentation/devicetree/bindings/pci/83xx-512x-pci.txt
>
> Both format uses:
> #size-cells = <2>;
> #address-cells = <3>;
>
> What is valid format?
Both. 7 cells are valid when the host (parent) bus is 64-bit and 6 cells
are valid when the host bus is 32-bit. The ranges property is <<child
address> <parent address> <size>>. The parent address #address-cells is
taken from the parent node.
Rob
next prev parent reply other threads:[~2012-12-10 14:26 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-10 12:20 pci and pcie device-tree binding - range No cells Michal Simek
2012-12-10 14:26 ` Rob Herring [this message]
2012-12-10 15:05 ` Michal Simek
2012-12-10 15:21 ` Rob Herring
2012-12-10 15:37 ` Michal Simek
2012-12-10 15:52 ` David Laight
2012-12-10 16:05 ` Michal Simek
2012-12-10 17:15 ` Thomas Petazzoni
2012-12-10 23:24 ` Rob Herring
2012-12-12 16:16 ` Thomas Petazzoni
2012-12-12 17:22 ` Grant Likely
2012-12-12 17:29 ` Rob Herring
2012-12-10 16:02 ` Rob Herring
2012-12-10 16:11 ` Michal Simek
2012-12-10 21:43 ` Grant Likely
2012-12-10 22:38 ` Benjamin Herrenschmidt
2012-12-10 23:11 ` Mitch Bradley
2012-12-10 21:41 ` Grant Likely
2012-12-12 10:37 ` Michal Simek
2012-12-12 10:49 ` Grant Likely
[not found] ` <CAPcvp5EJH-Q6wd7my+V+FUVE1=hzwMN-yOfHiukGvDmkcoRcsQ@mail.gmail.com>
2012-12-12 12:19 ` Andrew Murray
2012-12-12 13:34 ` Thierry Reding
2012-12-12 16:44 ` Andrew Murray
2012-12-12 16:55 ` Michal Simek
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