linux-kernel - Re: [PATCH 3/5] PCI: rcar: Add R-Car PCIe endpoint device tree bindings

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Date:   Thu, 7 Nov 2019 08:10:09 +0000
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Biju Das <biju.das@...renesas.com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Marek Vasut <marek.vasut+renesas@...il.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Murray <andrew.murray@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH 3/5] PCI: rcar: Add R-Car PCIe endpoint device tree bindings

Hi Biju,

Thank you for the review.

On Thu, Nov 7, 2019 at 7:39 AM Biju Das <biju.das@...renesas.com> wrote:
>
> Hi Prabhakar,
>
> Thanks for the patch
>
> > Subject: [PATCH 3/5] PCI: rcar: Add R-Car PCIe endpoint device tree bindings
> >
> > From: "Lad, Prabhakar" <prabhakar.mahadev-lad.rj@...renesas.com>
> >
> > This patch adds the bindings for the R-Car PCIe endpoint driver.
> >
> > Signed-off-by: Lad, Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > ---
> >  .../devicetree/bindings/pci/rcar-pci-ep.txt   | 43 +++++++++++++++++++
> >  1 file changed, 43 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/pci/rcar-pci-ep.txt
> >
> > diff --git a/Documentation/devicetree/bindings/pci/rcar-pci-ep.txt
> > b/Documentation/devicetree/bindings/pci/rcar-pci-ep.txt
> > new file mode 100644
> > index 000000000000..b8c8616ca007
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/pci/rcar-pci-ep.txt
> > @@ -0,0 +1,43 @@
> > +* Renesas R-Car PCIe Endpoint Controller DT description
> > +
> > +Required properties:
> > +         "renesas,pcie-ep-r8a774c0" for the R8A774C0 SoC;
> > +         "renesas,pcie-ep-rcar-gen3" for a generic R-Car Gen3 or
> > +                                  RZ/G2 compatible device.
> > +
> > +         When compatible with the generic version, nodes must list the
> > +         SoC-specific version corresponding to the platform first
> > +         followed by the generic version.
> > +
> > +- reg: Five register ranges as listed in the reg-names property
> > +- reg-names: Must include the following names
> > +     - "apb-base"
> > +     - "memory0"
> > +     - "memory1"
> > +     - "memory2"
> > +     - "memory3"
> > +- resets: Must contain phandles to PCIe-related reset lines exposed by IP
> > block
> > +- clocks: from common clock binding: clock specifiers for the PCIe controller
> > +      clock.
> > +- clock-names: from common clock binding: should be "pcie".
> > +
> > +Optional Property:
> > +- max-functions: Maximum number of functions that can be configured
> > (default 1).
> > +
> > +Example:
> > +
> > +SoC-specific DT Entry:
> > +
> > +     pcie_ep: pcie_ep@...00000 {
> > +             compatible = "renesas,pcie-r8a7791", "renesas,pcie-rcar-
> > gen2";
>
> I believe it is currently tested on RZ/G2E. so please use the same.
>
Yes you are correct its tested on RZ/G2E board, ill fix it in next iteration.

Cheers,
--Prabhakar