Re: [PATCH v4 01/12] dt-bindings: PCI: Cleanup of brcmstb YAML and add 7712 SoC

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On Wed, Jul 17, 2024 at 2:51 AM Krzysztof Kozlowski <krzk@xxxxxxxxxx> wrote:
>
> On 16/07/2024 23:31, Jim Quinlan wrote:
> > o Change order of the compatible strings to be alphabetical
> >
> > o Describe resets/reset-names before using them in rules
> >
>
> <form letter>
> This is a friendly reminder during the review process.
>
> It seems my or other reviewer's previous comments were not fully
> addressed. Maybe the feedback got lost between the quotes, maybe you
> just forgot to apply it. Please go back to the previous discussion and
> either implement all requested changes or keep discussing them.
>
> Thank you.
> </form letter>
>
> > o Add minItems/maxItems where needed.
> >
> > o Change maintainer: Nicolas has not been active for a while.  It also
> >   makes sense for a Broadcom employee to be the maintainer as many of the
> >   details are privy to Broadcom.
> >
> > Signed-off-by: Jim Quinlan <james.quinlan@xxxxxxxxxxxx>
> > ---
> >  .../bindings/pci/brcm,stb-pcie.yaml           | 26 ++++++++++++++-----
> >  1 file changed, 19 insertions(+), 7 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml b/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
> > index 11f8ea33240c..692f7ed7c98e 100644
> > --- a/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
> > +++ b/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
> > @@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
> >  title: Brcmstb PCIe Host Controller
> >
> >  maintainers:
> > -  - Nicolas Saenz Julienne <nsaenzjulienne@xxxxxxx>
> > +  - Jim Quinlan <james.quinlan@xxxxxxxxxxxx>
> >
> >  properties:
> >    compatible:
> > @@ -16,11 +16,11 @@ properties:
> >            - brcm,bcm2711-pcie # The Raspberry Pi 4
> >            - brcm,bcm4908-pcie
> >            - brcm,bcm7211-pcie # Broadcom STB version of RPi4
> > -          - brcm,bcm7278-pcie # Broadcom 7278 Arm
> >            - brcm,bcm7216-pcie # Broadcom 7216 Arm
> > -          - brcm,bcm7445-pcie # Broadcom 7445 Arm
> > +          - brcm,bcm7278-pcie # Broadcom 7278 Arm
> >            - brcm,bcm7425-pcie # Broadcom 7425 MIPs
> >            - brcm,bcm7435-pcie # Broadcom 7435 MIPs
> > +          - brcm,bcm7445-pcie # Broadcom 7445 Arm
> >
> >    reg:
> >      maxItems: 1
> > @@ -95,6 +95,18 @@ properties:
> >        minItems: 1
> >        maxItems: 3
> >
> > +  resets:
> > +    minItems: 1
> > +    items:
> > +      - description: reset for external PCIe PERST# signal # perst
> > +      - description: reset for phy reset calibration       # rescal
> > +
> > +  reset-names:
> > +    minItems: 1
> > +    items:
> > +      - const: perst
> > +      - const: rescal
>
> There are no devices with two resets. Anyway, this does not match one of
> your variants which have first element as rescal.


Hello Krzysztof,

At this commit there are two resets; the 4908 requires "perst" and the
7216 requires "rescal".   I now think what you are looking for is the
top-level
description of something like

resets:
  maxItems: 1
    oneOf:
      - description: reset controller handling the PERST# signal
      - description: phandle pointing to the RESCAL reset controller

reset-names:
  maxItems: 1
    oneOf:
      - const: perst
      - const: rescal

I left out minItems because imItems==maxItems=1

Before I was giving both of them as the "potential candidates list"
that will be used further on, but this is not how Yaml should be used.

Is the above in the right direction?

Regards,
Jim Quinlan
Broadcom STB/CM

>
> Best regards,
> Krzysztof
>

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