linux-kernel - Re: [PATCH v4] dt-bindings: PCI: altera: Convert to YAML

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Message-ID: <20240422145855.GA1242711-robh@kernel.org>
Date: Mon, 22 Apr 2024 09:58:55 -0500
From: Rob Herring <robh@...nel.org>
To: matthew.gerlach@...ux.intel.com
Cc: bhelgaas@...gle.com, lpieralisi@...nel.org, kw@...ux.com,
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
	linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] dt-bindings: PCI: altera: Convert to YAML

On Sat, Apr 20, 2024 at 09:53:42AM -0500, matthew.gerlach@...ux.intel.com wrote:
> From: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
> 
> Convert the device tree bindings for the Altera Root Port PCIe controller
> from text to YAML.
> 
> Signed-off-by: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
> ---
> v4:
>  - reorder reg-names to match original binding
>  - move reg and reg-names to top level with limits.
> 
> v3:
>  - Added years to copyright
>  - Correct order in file of allOf and unevaluatedProperties
>  - remove items: in compatible field
>  - fix reg and reg-names constraints
>  - replace deprecated pci-bus.yaml with pci-host-bridge.yaml
>  - fix entries in ranges property
>  - remove device_type from required
> 
> v2:
>  - Move allOf: to bottom of file, just like example-schema is showing
>  - add constraint for reg and reg-names
>  - remove unneeded device_type
>  - drop #address-cells and #size-cells
>  - change minItems to maxItems for interrupts:
>  - change msi-parent to just "msi-parent: true"
>  - cleaned up required:
>  - make subject consistent with other commits coverting to YAML
>  - s/overt/onvert/g
> ---
>  .../devicetree/bindings/pci/altera-pcie.txt   | 50 -----------
>  .../bindings/pci/altr,pcie-root-port.yaml     | 88 +++++++++++++++++++
>  2 files changed, 88 insertions(+), 50 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/pci/altera-pcie.txt
>  create mode 100644 Documentation/devicetree/bindings/pci/altr,pcie-root-port.yaml
> 
> diff --git a/Documentation/devicetree/bindings/pci/altera-pcie.txt b/Documentation/devicetree/bindings/pci/altera-pcie.txt
> deleted file mode 100644
> index 816b244a221e..000000000000
> --- a/Documentation/devicetree/bindings/pci/altera-pcie.txt
> +++ /dev/null
> @@ -1,50 +0,0 @@
> -* Altera PCIe controller
> -
> -Required properties:
> -- compatible :	should contain "altr,pcie-root-port-1.0" or "altr,pcie-root-port-2.0"
> -- reg:		a list of physical base address and length for TXS and CRA.
> -		For "altr,pcie-root-port-2.0", additional HIP base address and length.
> -- reg-names:	must include the following entries:
> -		"Txs": TX slave port region
> -		"Cra": Control register access region
> -		"Hip": Hard IP region (if "altr,pcie-root-port-2.0")
> -- interrupts:	specifies the interrupt source of the parent interrupt
> -		controller.  The format of the interrupt specifier depends
> -		on the parent interrupt controller.
> -- device_type:	must be "pci"
> -- #address-cells:	set to <3>
> -- #size-cells:		set to <2>
> -- #interrupt-cells:	set to <1>
> -- ranges:	describes the translation of addresses for root ports and
> -		standard PCI regions.
> -- interrupt-map-mask and interrupt-map: standard PCI properties to define the
> -		mapping of the PCIe interface to interrupt numbers.
> -
> -Optional properties:
> -- msi-parent:	Link to the hardware entity that serves as the MSI controller
> -		for this PCIe controller.
> -- bus-range:	PCI bus numbers covered
> -
> -Example
> -	pcie_0: pcie@...000000 {
> -		compatible = "altr,pcie-root-port-1.0";
> -		reg = <0xc0000000 0x20000000>,
> -			<0xff220000 0x00004000>;
> -		reg-names = "Txs", "Cra";
> -		interrupt-parent = <&hps_0_arm_gic_0>;
> -		interrupts = <0 40 4>;
> -		interrupt-controller;

What happened to this? It is clearly needed since the interrupt-map 
below points back to this node. Note that that didn't work at one point 
in time, but I think we fixed it.

It doesn't seem you are testing the binding against an actual DT. 
Please do that.

Rob

> -		#interrupt-cells = <1>;
> -		bus-range = <0x0 0xFF>;
> -		device_type = "pci";
> -		msi-parent = <&msi_to_gic_gen_0>;
> -		#address-cells = <3>;
> -		#size-cells = <2>;
> -		interrupt-map-mask = <0 0 0 7>;
> -		interrupt-map = <0 0 0 1 &pcie_0 1>,
> -			            <0 0 0 2 &pcie_0 2>,
> -			            <0 0 0 3 &pcie_0 3>,
> -			            <0 0 0 4 &pcie_0 4>;
> -		ranges = <0x82000000 0x00000000 0x00000000 0xc0000000 0x00000000 0x10000000
> -			  0x82000000 0x00000000 0x10000000 0xd0000000 0x00000000 0x10000000>;
> -	};