linux-kernel - Re: [PATCH v3 1/7] dt-bindings: pci: xilinx-nwl: Add phys

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Date: Wed, 22 May 2024 17:28:38 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: Sean Anderson <sean.anderson@...ux.dev>,
	g@...lgaas.smtp.subspace.kernel.org
Cc: Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>, linux-pci@...r.kernel.org,
	Michal Simek <michal.simek@....com>,
	Thippeswamy Havalige <thippeswamy.havalige@....com>,
	linux-arm-kernel@...ts.infradead.org,
	Bjorn Helgaas <bhelgaas@...gle.com>, linux-kernel@...r.kernel.org,
	Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v3 1/7] dt-bindings: pci: xilinx-nwl: Add phys

On Mon, May 20, 2024 at 10:53:56AM -0400, Sean Anderson wrote:
> Add phys properties so Linux can power-on/configure the GTR
> transcievers.

s/transcievers/transceivers/

Possibly s/phys/PHYs/ in subject, commit log, DT description to avoid
confusion with "phys" (short for generic "physical").  Or maybe even
just "PHY properties"?

What does "GTR" mean?  Possibly expand that?

> Signed-off-by: Sean Anderson <sean.anderson@...ux.dev>
> ---
> 
> Changes in v3:
> - Document phys property
> 
> Changes in v2:
> - Remove phy-names
> - Add an example
> 
>  Documentation/devicetree/bindings/pci/xlnx,nwl-pcie.yaml | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/pci/xlnx,nwl-pcie.yaml b/Documentation/devicetree/bindings/pci/xlnx,nwl-pcie.yaml
> index 426f90a47f35..cc50795d170b 100644
> --- a/Documentation/devicetree/bindings/pci/xlnx,nwl-pcie.yaml
> +++ b/Documentation/devicetree/bindings/pci/xlnx,nwl-pcie.yaml
> @@ -61,6 +61,11 @@ properties:
>    interrupt-map:
>      maxItems: 4
>  
> +  phys:
> +    minItems: 1
> +    maxItems: 4
> +    description: One phy per logical lane, in order
> +
>    power-domains:
>      maxItems: 1
>  
> @@ -110,6 +115,7 @@ examples:
>    - |
>      #include <dt-bindings/interrupt-controller/arm-gic.h>
>      #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/phy/phy.h>
>      #include <dt-bindings/power/xlnx-zynqmp-power.h>
>      soc {
>          #address-cells = <2>;
> @@ -138,6 +144,7 @@ examples:
>                              <0x0 0x0 0x0 0x3 &pcie_intc 0x3>,
>                              <0x0 0x0 0x0 0x4 &pcie_intc 0x4>;
>              msi-parent = <&nwl_pcie>;
> +            phys = <&psgtr 0 PHY_TYPE_PCIE 0 0>;
>              power-domains = <&zynqmp_firmware PD_PCIE>;
>              iommus = <&smmu 0x4d0>;
>              pcie_intc: legacy-interrupt-controller {
> -- 
> 2.35.1.1320.gc452695387.dirty
>