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Message-ID: <20240809181401.GA973841-robh@kernel.org>
Date: Fri, 9 Aug 2024 12:14:01 -0600
From: Rob Herring <robh@...nel.org>
To: matthew.gerlach@...ux.intel.com
Cc: lpieralisi@...nel.org, kw@...ux.com, bhelgaas@...gle.com,
krzk+dt@...nel.org, conor+dt@...nel.org, dinguyen@...nel.org,
joyce.ooi@...el.com, linux-pci@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Conor Dooley <conor.dooley@...rochip.com>
Subject: Re: [PATCH v2 1/7] dt-bindings: PCI: altera: Convert to YAML
On Fri, Aug 09, 2024 at 10:12:07AM -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. Update the entries in the interrupt-map field to have
> the correct number of address cells for the interrupt parent.
>
> Signed-off-by: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
> Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
> ---
> v8:
v2 or v8 or ??? I'm confused and tools will be too.
> - Precisely constrain the number of items for reg and reg-names properties.
> Constrain maxItems to 2 for altr,pcie-root-port-1.0.
> Constrain minItems to 3 for altr,pcie-root-port-2.0.
>
> v7:
> - Keep original example dts, but fix warnings of interrupt-map field.
>
> v6:
> - Fix dt_binding_check warnings by creating interrupt-controller subnode
> and fixing interrupt-map.
> - Updated filename in MAINTAINERS.
>
> v5:
> - add interrupt-controller #interrupt-cells to required field
> - don't touch original example dts
>
> 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 | 114 ++++++++++++++++++
> MAINTAINERS | 2 +-
> 3 files changed, 115 insertions(+), 51 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;
> - #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>;
> - };
> diff --git a/Documentation/devicetree/bindings/pci/altr,pcie-root-port.yaml b/Documentation/devicetree/bindings/pci/altr,pcie-root-port.yaml
> new file mode 100644
> index 000000000000..52533fccc134
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/altr,pcie-root-port.yaml
> @@ -0,0 +1,114 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright (C) 2015, 2019, 2024, Intel Corporation
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/altr,pcie-root-port.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Altera PCIe Root Port
> +
> +maintainers:
> + - Matthew Gerlach <matthew.gerlach@...ux.intel.com>
> +
> +properties:
> + compatible:
> + enum:
> + - altr,pcie-root-port-1.0
> + - altr,pcie-root-port-2.0
> +
> + reg:
> + items:
> + - description: TX slave port region
> + - description: Control register access region
> + - description: Hard IP region
> + minItems: 2
> +
> + reg-names:
> + items:
> + - const: Txs
> + - const: Cra
> + - const: Hip
> + minItems: 2
> +
> + interrupts:
> + maxItems: 1
> +
> + interrupt-controller: true
> +
> + interrupt-map-mask:
> + items:
> + - const: 0
> + - const: 0
> + - const: 0
> + - const: 7
> +
> + interrupt-map:
> + maxItems: 4
> +
> + "#interrupt-cells":
> + const: 1
> +
> + msi-parent: true
> +
> +required:
> + - compatible
> + - reg
> + - reg-names
> + - interrupts
> + - "#interrupt-cells"
> + - interrupt-controller
> + - interrupt-map
> + - interrupt-map-mask
> +
> +allOf:
> + - $ref: /schemas/pci/pci-host-bridge.yaml#
> + - if:
> + properties:
> + compatible:
> + enum:
> + - altr,pcie-root-port-1.0
> + then:
> + properties:
> + reg:
> + maxItems: 2
> +
> + reg-names:
> + maxItems: 2
> +
> + else:
> + properties:
> + reg:
> + minItems: 3
> +
> + reg-names:
> + minItems: 3
> +
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> + #include <dt-bindings/interrupt-controller/irq.h>
> + 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 = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-controller;
> + #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 0 0 0 1>,
> + <0 0 0 2 &pcie_0 0 0 0 2>,
> + <0 0 0 3 &pcie_0 0 0 0 3>,
> + <0 0 0 4 &pcie_0 0 0 0 4>;
> + ranges = <0x82000000 0x00000000 0x00000000 0xc0000000 0x00000000 0x10000000>,
> + <0x82000000 0x00000000 0x10000000 0xd0000000 0x00000000 0x10000000>;
> + };
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 1e71f97fb674..53f239114400 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -17435,7 +17435,7 @@ PCI DRIVER FOR ALTERA PCIE IP
> M: Joyce Ooi <joyce.ooi@...el.com>
> L: linux-pci@...r.kernel.org
> S: Supported
> -F: Documentation/devicetree/bindings/pci/altera-pcie.txt
> +F: Documentation/devicetree/bindings/pci/altr,pcie-root-port.yaml
> F: drivers/pci/controller/pcie-altera.c
>
> PCI DRIVER FOR APPLIEDMICRO XGENE
> --
> 2.34.1
>
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