[PATCH v2 04/10] doc/bindings: Update PCIe devicetree binding documentation for LS2080A

[Sharma Bhupesh]

> From: pku.leo at gmail.com [mailto:pku.leo at gmail.com]
> Sent: Wednesday, September 09, 2015 1:36 AM
> On Mon, Sep 7, 2015 at 6:32 AM, Arnd Bergmann <arnd at arndb.de> wrote:
> > On Friday 04 September 2015 12:27:46 Bhupesh Sharma wrote:
> >> @@ -4,7 +4,8 @@ This PCIe host controller is based on the Synopsis
> >> Designware PCIe IP  and thus inherits all the common properties
> defined in designware-pcie.txt.
> >>
> >>  Required properties:
> >> -- compatible: should contain the platform identifier such as
> "fsl,ls1021a-pcie"
> >> +- compatible: should contain the platform identifier such as
> >> +"fsl,ls1021a-pcie",
> >> +  "fsl,ls2080a-pcie".
> >>  - reg: base addresses and lengths of the PCIe controller
> >>  - interrupts: A list of interrupt outputs of the controller. Must
> contain an
> >>    entry for each entry in the interrupt-names property.
> >>
> >
> > Are the two PCIe hosts mutually compatible? If they are, you should
> > mandate one of the strings as the base model for identification, with
> > the additional model being optional for identification of the specific
> SoC.
> 
> It seems that controllers on these chips are not exactly the same.
> They will get different driver data by matching the compatible strings.
> Probably we could define a more generic compatible string, such as
> "fsl,layerscape-pcie" or "fsl,ls-pcie".

Yes, Minghaun captured the differences in the two versions in the v1 review
discussion for the DTS here:
http://lists.infradead.org/pipermail/linux-arm-kernel/2015-April/338343.html

Regards,
Bhupesh