Re: [PATCH 1/3] dt-bindings: pci: Add DT binding for Toshiba Visconti PCIe controller

[Rob Herring <robh+dt@kernel.org>]

On Tue, Apr 6, 2021 at 10:19 PM Nobuhiro Iwamatsu
<nobuhiro1.iwamatsu@toshiba.co.jp> wrote:
>
> This commit adds the Device Tree binding documentation that allows
> to describe the PCIe controller found in Toshiba Visconti SoCs.
>
> Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> ---
>  .../bindings/pci/toshiba,visconti-pcie.yaml   | 121 ++++++++++++++++++
>  1 file changed, 121 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
>
> diff --git a/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml b/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
> new file mode 100644
> index 000000000000..8ab60c235007
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
> @@ -0,0 +1,121 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pci/toshiba,visconti-pcie.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Toshiba Visconti5 SoC PCIe Host Controller Device Tree Bindings
> +
> +maintainers:
> +  - Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> +
> +description: |+
> +  Toshiba Visconti5 SoC PCIe host controller is based on the Synopsys DesignWare PCIe IP.
> +
> +allOf:
> +  - $ref: /schemas/pci/pci-bus.yaml#
> +
> +properties:
> +  compatible:
> +    const: toshiba,visconti-pcie
> +
> +  reg:
> +    items:
> +      - description: Data Bus Interface (DBI) registers.
> +      - description: PCIe configuration space region.
> +      - description: Visconti specific additional registers.
> +      - description: Visconti specific SMU registers
> +      - description: Visconti specific memory protection unit registers (MPU)
> +
> +  reg-names:
> +    items:
> +      - const: dbi
> +      - const: config
> +      - const: ulreg
> +      - const: smu
> +      - const: mpu
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: PCIe reference clock
> +      - description: PCIe system clock
> +      - description: Auxiliary clock
> +
> +  clock-names:
> +    items:
> +      - const: pcie_refclk
> +      - const: sysclk
> +      - const: auxclk
> +
> +  num-lanes:
> +    const: 2
> +
> +  num-viewport:
> +    const: 8

Drop this, we detect this now.

> +
> +required:

Drop everything that pci-bus.yaml already requires.

> +  - reg
> +  - reg-names
> +  - interrupts
> +  - "#address-cells"
> +  - "#size-cells"
> +  - "#interrupt-cells"
> +  - interrupt-map
> +  - interrupt-map-mask
> +  - ranges
> +  - bus-range

If you support 0-0xff, there's no need for this to be required.

> +  - device_type
> +  - num-lanes
> +  - num-viewport
> +  - clocks
> +  - clock-names
> +  - max-link-speed
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    soc {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        pcie: pcie@28400000 {
> +            compatible = "toshiba,visconti-pcie";
> +            reg = <0x0 0x28400000 0x0 0x00400000>,
> +                  <0x0 0x70000000 0x0 0x10000000>,
> +                  <0x0 0x28050000 0x0 0x00010000>,
> +                  <0x0 0x24200000 0x0 0x00002000>,
> +                  <0x0 0x24162000 0x0 0x00001000>;
> +            reg-names  = "dbi", "config", "ulreg", "smu", "mpu";
> +            device_type = "pci";
> +            bus-range = <0x00 0xff>;
> +            num-lanes = <2>;
> +            num-viewport = <8>;
> +
> +            #address-cells = <3>;
> +            #size-cells = <2>;
> +            #interrupt-cells = <1>;
> +            ranges = <0x81000000 0 0x40000000 0 0x40000000 0 0x00010000>,
> +                     <0x82000000 0 0x50000000 0 0x50000000 0 0x20000000>;
> +            interrupts = <GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
> +            interrupt-names = "intr";
> +            interrupt-map-mask = <0 0 0 7>;
> +            interrupt-map =
> +                <0 0 0 1 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> +                 0 0 0 2 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> +                 0 0 0 3 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> +                 0 0 0 4 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
> +            clocks = <&extclk100mhz>, <&clk600mhz>, <&clk25mhz>;
> +            clock-names = "pcie_refclk", "sysclk", "auxclk";
> +            max-link-speed = <2>;
> +
> +            status = "disabled";

Don't show status in examples.

> +        };
> +    };
> +...
> --
> 2.30.0.rc2
>