linux-zen-server/Documentation/devicetree/bindings/pci/hisilicon,kirin-pcie.yaml

# 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@hisilicon.com>
  - Binghui Wang <wangbinghui@hisilicon.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 dbi, apb, config registers location and length.
      For hisilicon,kirin960-pcie, it should also contain phy.      
    minItems: 3
    maxItems: 4

  reg-names:
    minItems: 3
    maxItems: 4

  clocks: true

  clock-names:
    items:
      - const: pcie_phy_ref
      - const: pcie_aux
      - const: pcie_apb_phy
      - const: pcie_apb_sys
      - const: pcie_aclk

  phys:
    maxItems: 1

  hisilicon,clken-gpios:
    description: |
      Clock input enablement GPIOs from PCI devices like Ethernet, M.2 and
      mini-PCIe slots.      

required:
  - compatible
  - reg
  - reg-names

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/clock/hi3660-clock.h>
    #include <dt-bindings/clock/hi3670-clock.h>

    soc {
      #address-cells = <2>;
      #size-cells = <2>;

      pcie@f4000000 {
        compatible = "hisilicon,kirin960-pcie";
        reg = <0x0 0xf4000000 0x0 0x1000>,
              <0x0 0xff3fe000 0x0 0x1000>,
              <0x0 0xf3f20000 0x0 0x40000>,
              <0x0 0xf5000000 0x0 0x2000>;
        reg-names = "dbi", "apb", "phy", "config";
        bus-range = <0x0  0xff>;
        #address-cells = <3>;
        #size-cells = <2>;
        device_type = "pci";
        ranges = <0x02000000 0x0 0x00000000
                  0x0 0xf6000000
                  0x0 0x02000000>;
        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>;
        clocks = <&crg_ctrl HI3660_PCIEPHY_REF>,
                 <&crg_ctrl HI3660_CLK_GATE_PCIEAUX>,
                 <&crg_ctrl HI3660_PCLK_GATE_PCIE_PHY>,
                 <&crg_ctrl HI3660_PCLK_GATE_PCIE_SYS>,
                 <&crg_ctrl HI3660_ACLK_GATE_PCIE>;
        clock-names = "pcie_phy_ref", "pcie_aux", "pcie_apb_phy",
                      "pcie_apb_sys", "pcie_aclk";
      };

      pcie@f5000000 {
        compatible = "hisilicon,kirin970-pcie";
        reg = <0x0 0xf4000000 0x0 0x1000000>,
              <0x0 0xfc180000 0x0 0x1000>,
              <0x0 0xf5000000 0x0 0x2000>;
        reg-names = "dbi", "apb", "config";
        bus-range = <0x0  0xff>;
        #address-cells = <3>;
        #size-cells = <2>;
        device_type = "pci";
        phys = <&pcie_phy>;
        ranges = <0x02000000 0x0 0x00000000
                  0x0 0xf6000000
                  0x0 0x02000000>;
        num-lanes = <1>;
        #interrupt-cells = <1>;
        interrupts = <GIC_SPI 283 IRQ_TYPE_LEVEL_HIGH>;
        interrupt-names = "msi";
        interrupt-map-mask = <0 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>;
        hisilicon,clken-gpios = <&gpio27 3 0>, <&gpio17 0 0>, <&gpio20 6 0>;
        pcie@0,0 { // Lane 0: PCIe switch: Bus 1, Device 0
          reg = <0 0 0 0 0>;
          compatible = "pciclass,0604";
          device_type = "pci";
          #address-cells = <3>;
          #size-cells = <2>;
          ranges;

          pcie@0,0 { // Lane 0: upstream
            reg = <0 0 0 0 0>;
            compatible = "pciclass,0604";
            device_type = "pci";
            #address-cells = <3>;
            #size-cells = <2>;
            ranges;

            pcie@1,0 { // Lane 4: M.2
              reg = <0x0800 0 0 0 0>;
              compatible = "pciclass,0604";
              device_type = "pci";
              reset-gpios = <&gpio3 1 0>;
              #address-cells = <3>;
              #size-cells = <2>;
              ranges;
            };

            pcie@5,0 { // Lane 5: Mini PCIe
              reg = <0x2800 0 0 0 0>;
              compatible = "pciclass,0604";
              device_type = "pci";
              reset-gpios = <&gpio27 4 0 >;
              #address-cells = <3>;
              #size-cells = <2>;
              ranges;
            };

            pcie@7,0 { // Lane 6: Ethernet
              reg = <0x03800 0 0 0 0>;
              compatible = "pciclass,0604";
              device_type = "pci";
              reset-gpios = <&gpio25 2 0 >;
              #address-cells = <3>;
              #size-cells = <2>;
              ranges;
            };
          };
        };
      };
    };