xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pci/fsl,imx6q-pcie-ep.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Freescale i.MX6 PCIe Endpoint controller

maintainers:
  - Lucas Stach <l.stach@pengutronix.de>
  - Richard Zhu <hongxing.zhu@nxp.com>

description: |+
  This PCIe controller is based on the Synopsys DesignWare PCIe IP and
  thus inherits all the common properties defined in snps,dw-pcie-ep.yaml.
  The controller instances are dual mode where in they can work either in
  Root Port mode or Endpoint mode but one at a time.

properties:
  compatible:
    enum:
      - fsl,imx8mm-pcie-ep
      - fsl,imx8mq-pcie-ep
      - fsl,imx8mp-pcie-ep

  reg:
    minItems: 2

  reg-names:
    items:
      - const: dbi
      - const: addr_space

  clocks:
    minItems: 3
    items:
      - description: PCIe bridge clock.
      - description: PCIe bus clock.
      - description: PCIe PHY clock.
      - description: Additional required clock entry for imx6sx-pcie,
           imx6sx-pcie-ep, imx8mq-pcie, imx8mq-pcie-ep.

  clock-names:
    minItems: 3
    maxItems: 4

  interrupts:
    items:
      - description: builtin eDMA interrupter.

  interrupt-names:
    items:
      - const: dma

required:
  - compatible
  - reg
  - reg-names
  - interrupts
  - interrupt-names

allOf:
  - $ref: /schemas/pci/snps,dw-pcie-ep.yaml#
  - $ref: /schemas/pci/fsl,imx6q-pcie-common.yaml#
  - if:
      properties:
        compatible:
          enum:
            - fsl,imx8mq-pcie-ep
    then:
      properties:
        clocks:
          minItems: 4
        clock-names:
          items:
            - const: pcie
            - const: pcie_bus
            - const: pcie_phy
            - const: pcie_aux
    else:
      properties:
        clocks:
          maxItems: 3
        clock-names:
          items:
            - const: pcie
            - const: pcie_bus
            - const: pcie_aux


unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/clock/imx8mp-clock.h>
    #include <dt-bindings/power/imx8mp-power.h>
    #include <dt-bindings/reset/imx8mp-reset.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>

    pcie_ep: pcie-ep@33800000 {
      compatible = "fsl,imx8mp-pcie-ep";
      reg = <0x33800000 0x000400000>, <0x18000000 0x08000000>;
      reg-names = "dbi", "addr_space";
      clocks = <&clk IMX8MP_CLK_HSIO_ROOT>,
               <&clk IMX8MP_CLK_HSIO_AXI>,
               <&clk IMX8MP_CLK_PCIE_ROOT>;
      clock-names = "pcie", "pcie_bus", "pcie_aux";
      assigned-clocks = <&clk IMX8MP_CLK_PCIE_AUX>;
      assigned-clock-rates = <10000000>;
      assigned-clock-parents = <&clk IMX8MP_SYS_PLL2_50M>;
      num-lanes = <1>;
      interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_HIGH>; /* eDMA */
      interrupt-names = "dma";
      fsl,max-link-speed = <3>;
      power-domains = <&hsio_blk_ctrl IMX8MP_HSIOBLK_PD_PCIE>;
      resets = <&src IMX8MP_RESET_PCIE_CTRL_APPS_EN>,
               <&src IMX8MP_RESET_PCIE_CTRL_APPS_TURNOFF>;
      reset-names = "apps", "turnoff";
      phys = <&pcie_phy>;
      phy-names = "pcie-phy";
      num-ib-windows = <4>;
      num-ob-windows = <4>;
    };