linux-kernel - Aw: Re: [RFC/RFT v2 05/11] dt-bindings: pci: add bifurcation option to Rockchip DesignWare binding

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Message-ID: <trinity-fcca248f-cb76-474a-8227-5b7188140bdf-1651130723782@3c-app-gmx-bs20>
Date:   Thu, 28 Apr 2022 09:25:23 +0200
From:   Frank Wunderlich <frank-w@...lic-files.de>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Frank Wunderlich <linux@...web.de>,
        linux-rockchip@...ts.infradead.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Johan Jonker <jbx6244@...il.com>,
        Peter Geis <pgwipeout@...il.com>,
        Michael Riesch <michael.riesch@...fvision.net>,
        linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-phy@...ts.infradead.org
Subject: Aw: Re: [RFC/RFT v2 05/11] dt-bindings: pci: add bifurcation option
 to Rockchip DesignWare binding

Hi
> Gesendet: Donnerstag, 28. April 2022 um 08:37 Uhr
> Von: "Krzysztof Kozlowski" <krzysztof.kozlowski@...aro.org>
> On 26/04/2022 15:21, Frank Wunderlich wrote:
> > From: Frank Wunderlich <frank-w@...lic-files.de>
> >
> > Add bifurcation property for splitting PCIe lanes.
> >
> > Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
> > ---
> >  Documentation/devicetree/bindings/pci/rockchip-dw-pcie.yaml | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/pci/rockchip-dw-pcie.yaml b/Documentation/devicetree/bindings/pci/rockchip-dw-pcie.yaml
> > index bc0a9d1db750..a992970e8b85 100644
> > --- a/Documentation/devicetree/bindings/pci/rockchip-dw-pcie.yaml
> > +++ b/Documentation/devicetree/bindings/pci/rockchip-dw-pcie.yaml
> > @@ -74,6 +74,8 @@ properties:
> >    reset-names:
> >      const: pipe
> >
> > +  bifurcation: true
> > +
>
> Does not look like standard property. Is it already defined somewhere?
> All non-standard properties need vendor, type and description.

have removed vendor-prefix from v1>v2 based on suggestion this can be useful for other vendors too.

but last 3 patches of this series replacing bifurcation property (which is only bool) by the more useful lane-map (left alone for discussion, will be squashed if the right way is found).

i guess same here, description+type needed, but how to describe an array of int in yaml? do you know any examples?

regards Frank