linux-kernel - Re: Re: [RFC/RFT 4/6] PCI: rockchip-dwc: add pcie bifurcation

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Date:   Mon, 18 Apr 2022 10:53:13 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Frank Wunderlich <frank-w@...lic-files.de>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Frank Wunderlich <linux@...web.de>,
        linux-rockchip@...ts.infradead.org,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Johan Jonker <jbx6244@...il.com>,
        Peter Geis <pgwipeout@...il.com>,
        Michael Riesch <michael.riesch@...fvision.net>,
        linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-pci@...r.kernel.org
Subject: Re: Re: [RFC/RFT 4/6] PCI: rockchip-dwc: add pcie bifurcation

On Sun, Apr 17, 2022 at 11:08:02AM +0200, Frank Wunderlich wrote:
> > On Sat, Apr 16, 2022 at 03:54:56PM +0200, Frank Wunderlich wrote:
> > > From: Frank Wunderlich <frank-w@...lic-files.de>
> > >
> > > PCIe Lanes can be split to 2 slots with bifurcation.
> > > Add support for this in existing pcie driver.

> > Is the "rockchip,bifurcation" DT property something that should be
> > generalized so it's not rockchip-specific?  Other controllers are
> > likely to support similar functionality.
> 
> I do not know if other controllers support similar functionality,
> but i ack a property without vendor prefix is better. Should i use
> "bifurcation" as name or do you think about a different name which
> is more generic?

Really a question for Rob about what name would be good and where it
should go.