linux-kernel - Re: [PATCH 1/5] dt-bindings: pci: Add ARTPEC-8 PCIe controller

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Message-ID: <047cec5c-b9e4-5480-be96-01bae8610078@kernel.org>
Date:   Mon, 28 Mar 2022 20:41:55 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     wangseok.lee@...sung.com,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzk+dt@...nel.org" <krzk+dt@...nel.org>,
        "kishon@...com" <kishon@...com>,
        "vkoul@...nel.org" <vkoul@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "jesper.nilsson@...s.com" <jesper.nilsson@...s.com>,
        "lars.persson@...s.com" <lars.persson@...s.com>
Cc:     "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "linux-phy@...ts.infradead.org" <linux-phy@...ts.infradead.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
        "kw@...ux.com" <kw@...ux.com>,
        "linux-arm-kernel@...s.com" <linux-arm-kernel@...s.com>,
        "kernel@...s.com" <kernel@...s.com>,
        전문기 <moonki.jun@...sung.com>
Subject: Re: [PATCH 1/5] dt-bindings: pci: Add ARTPEC-8 PCIe controller

On 28/03/2022 03:48, 이왕석 wrote:
> Add description to support Axis, ARTPEC-8 SoC.
> ARTPEC-8 is the SoC platform of Axis Communications
> and PCIe controller is designed based on Design-Ware PCIe controller.
> 
> Signed-off-by: Wangseok Lee <wangseok.lee@...sung.com>
> ---
>  .../bindings/pci/axis,artpec8-pcie-ep.yaml         | 110 +++++++++++++++++++
>  .../devicetree/bindings/pci/axis,artpec8-pcie.yaml | 117 +++++++++++++++++++++
>  2 files changed, 227 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml
>  create mode 100644 Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml
> 
> diff --git a/Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml
> new file mode 100644
> index 0000000..dc66965
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml
> @@ -0,0 +1,110 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pci/axis,artpec8-pcie-ep.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: ARTPEC-8 SoC PCIe Controller Device Tree Bindings
> +
> +maintainers:
> +  - Jesper Nilsson <jesper.nilsson@...s.com>
> +
> +description: |+
> +  This PCIe end-point controller is based on the Synopsys DesignWare PCIe IP
> +  and thus inherits all the common properties defined in snps,dw-pcie-ep.yaml.
> +
> +allOf:
> +  - $ref: /schemas/pci/snps,dw-pcie-ep.yaml#
> +
> +properties:
> +  compatible:
> +    const: axis,artpec8-pcie-ep
> +
> +  reg:
> +    items:
> +      - description: Data Bus Interface (DBI) registers.
> +      - description: Data Bus Interface (DBI2) registers.
> +      - description: PCIe address space region.
> +
> +  reg-names:
> +    items:
> +      - const: dbi
> +      - const: dbi2
> +      - const: addr_space
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: PIPE clock, used by the controller to clock the PIPE
> +      - description: PCIe dbi clock, ungated version
> +      - description: PCIe master clock, ungated version
> +      - description: PCIe slave clock, ungated version
> +
> +  clock-names:
> +    items:
> +      - const: pipe_clk
> +      - const: dbi_clk
> +      - const: mstr_clk
> +      - const: slv_clk
> +
> +  phys:
> +    maxItems: 1
> +
> +  num-lanes:
> +    const: 2
> +
> +required:

compatible

> +  - clocks
> +  - clock-names
> +  - reg
> +  - reg-names
> +  - num-lanes
> +  - bus-range
> +  - interrupts
> +  - interrupt-names
> +  - samsung,fsys-sysreg
> +  - samsung,syscon-phandle
> +  - samsung,syscon-bus-s-fsys
> +  - samsung,syscon-bus-p-fsys

Why are they here but not in properties? Other properties are also
present here but not in properties.

> +  - phys
> +  - phy-names
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    artec8 {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +        pcie_ep: pcie-ep@...00000 {
> +            compatible = "axis,artpec8-pcie-ep";
> +            clocks = <&clock_cmu_fsys 39>,
> +                        <&clock_cmu_fsys 38>,
> +                        <&clock_cmu_fsys 37>,
> +                        <&clock_cmu_fsys 36>;

Align the indentation of continued lines/entries.

> +            clock-names = "pipe_clk", "dbi_clk", "mstr_clk", "slv_clk";
> +            reg = <0x0 0x17200000 0x0 0x1000>,

Put reg after compatible.

> +                    <0x0 0x17201000 0x0 0x1000>,
> +                    <0x2 0x00000000 0x6 0x00000000>;
> +            reg-names = "dbi", "dbi2", "addr_space";
> +            num-lanes = <2>;
> +            bus-range = <0x00 0xff>;
> +            interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
> +            interrupt-names = "intr";
> +            #interrupt-cells = <1>;
> +            num-ib-windows = <16>;
> +            num-ob-windows = <16>;

Did you test the bindings with `make dt_binding_check`?

All comments apply also to your second file.

Best regards,
Krzysztof