linux-kernel - Re: [PATCH v7 09/10] dt-bindings: PCI: kirin-pcie.txt: Convert it to yaml

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Date:   Fri, 23 Jul 2021 16:56:18 -0600
From:   Rob Herring <robh@...nel.org>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc:     Vinod Koul <vkoul@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
        linuxarm@...wei.com, mauro.chehab@...wei.com,
        Binghui Wang <wangbinghui@...ilicon.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Jingoo Han <jingoohan1@...il.com>,
        Xiaowei Song <songxiaowei@...ilicon.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pci@...r.kernel.org
Subject: Re: [PATCH v7 09/10] dt-bindings: PCI: kirin-pcie.txt: Convert it to
 yaml

On Wed, Jul 21, 2021 at 10:39:11AM +0200, Mauro Carvalho Chehab wrote:
> Convert the file into a JSON description at the yaml format.

And add 970...

> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> ---
>  .../bindings/pci/hisilicon,kirin-pcie.yaml    | 87 +++++++++++++++++++
>  .../devicetree/bindings/pci/kirin-pcie.txt    | 50 -----------
>  .../devicetree/bindings/pci/snps,dw-pcie.yaml |  2 +-
>  MAINTAINERS                                   |  2 +-
>  4 files changed, 89 insertions(+), 52 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/pci/hisilicon,kirin-pcie.yaml
>  delete mode 100644 Documentation/devicetree/bindings/pci/kirin-pcie.txt
> 
> diff --git a/Documentation/devicetree/bindings/pci/hisilicon,kirin-pcie.yaml b/Documentation/devicetree/bindings/pci/hisilicon,kirin-pcie.yaml
> new file mode 100644
> index 000000000000..eabc651c9766
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/hisilicon,kirin-pcie.yaml
> @@ -0,0 +1,87 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pci/hisilicon,kirin-pcie.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: HiSilicon Kirin SoCs PCIe host DT description
> +
> +maintainers:
> +  - Xiaowei Song <songxiaowei@...ilicon.com>
> +  - Binghui Wang <wangbinghui@...ilicon.com>
> +
> +description: |
> +  Kirin PCIe host controller is based on the Synopsys DesignWare PCI core.
> +  It shares common functions with the PCIe DesignWare core driver and
> +  inherits common properties defined in
> +  Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml.
> +
> +allOf:
> +  - $ref: /schemas/pci/snps,dw-pcie.yaml#
> +
> +properties:
> +  compatible:
> +    contains:
> +      enum:
> +        - hisilicon,kirin960-pcie
> +        - hisilicon,kirin970-pcie
> +
> +  reg:
> +    description: |
> +      Should contain rc_dbi, apb, config registers location and length.
> +    minItems: 3
> +    maxItems: 4
> +
> +  reg-names:
> +    items:
> +      - const: dbi          # controller configuration registers
> +      - const: apb          # apb Ctrl register defined by Kirin
> +      - const: config       # PCIe configuration space registers
> +      - const: phy          # apb PHY register used on Kirin 960 PHY
> +    minItems: 3
> +    maxItems: 4
> +
> +  reset-gpios:
> +    description: The GPIO(s) to generate PCIe PERST# assert and deassert signal.
> +    minItems: 1
> +    maxItems: 4

I'll apply this, but only with 'maxItems: 1' if you want to separate the 
discussion on that part.

> +
> +required:
> +  - compatible
> +  - reg
> +  - reg-names
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    soc {
> +      #address-cells = <2>;
> +      #size-cells = <2>;
> +
> +      pcie: pcie@...00000 {
> +        compatible = "hisilicon,kirin970-pcie";
> +        reg = <0x0 0xf4000000 0x0 0x1000>,
> +              <0x0 0xff3fe000 0x0 0x1000>,
> +              <0x0 0xf4000000 0 0x2000>;
> +        reg-names = "dbi", "apb", "config";
> +        bus-range = <0x0  0x1>;
> +        #address-cells = <3>;
> +        #size-cells = <2>;
> +        device_type = "pci";
> +        ranges = <0x02000000 0x0 0x00000000 0x0 0xf5000000 0x0 0x2000000>;
> +        num-lanes = <1>;
> +        #interrupt-cells = <1>;
> +        interrupts = <0 283 4>;
> +        interrupt-names = "msi";
> +        interrupt-map-mask = <0xf800 0 0 7>;
> +        interrupt-map = <0x0 0 0 1 &gic GIC_SPI 282 IRQ_TYPE_LEVEL_HIGH>,
> +                        <0x0 0 0 2 &gic GIC_SPI 283 IRQ_TYPE_LEVEL_HIGH>,
> +                        <0x0 0 0 3 &gic GIC_SPI 284 IRQ_TYPE_LEVEL_HIGH>,
> +                        <0x0 0 0 4 &gic GIC_SPI 285 IRQ_TYPE_LEVEL_HIGH>;
> +        reset-gpios = <&gpio7 0 0 >, <&gpio25 2 0 >,
> +                      <&gpio3 1 0 >, <&gpio27 4 0 >;
> +      };
> +    };