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From:   Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Date:   Wed, 7 Oct 2020 21:57:00 +0200
Message-ID: <CAFBinCBtHANer=kN70CVgcseB0g5QauNSN+mv0gjSFPk_HOmQg@mail.gmail.com>
Subject: Re: [RFC PATCH 2/3] dt-bindings: gpio: Add binding documentation for
 Etron EJ168/EJ188/EJ198
To:     Rob Herring <robh@kernel.org>
Cc:     linux-pci@vger.kernel.org, devicetree@vger.kernel.org,
        linux-gpio@vger.kernel.org, bgolaszewski@baylibre.com,
        linus.walleij@linaro.org, linux-kernel@vger.kernel.org,
        bhelgaas@google.com
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Hi Rob,

On Tue, Oct 6, 2020 at 11:25 PM Rob Herring <robh@kernel.org> wrote:
[...]
> > +examples:
> > +  - |
> > +      pcie {
> > +        #address-cells = <3>;
> > +        #size-cells = <2>;
> > +
> > +        gpio@0,0,0 {
> > +          compatible = "pci1b6f,7023";
> > +          reg = <0x0 0x0 0x0 0x0 0x1000>;
> > +          gpio-controller;
> > +          #gpio-cells = <2>;
> > +        };
>
> How would this look if you needed to describe the XHCI controller?
> That's another PCI function?
unfortunately I have no documentation about this
the "reference driver" is poking the PCI config space registers of the
xHCI controller - without any dedicated function for this


Best regards,
Martin