Commit d2a704e2 authored by Li Jun's avatar Li Jun Committed by Greg Kroah-Hartman
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dt-bindings: usb: dwc3-imx8mp: add imx8mp dwc3 glue bindings 



NXP imx8mp integrates 2 dwc3 3.30b IP and add some wakeup logic
to support low power mode, the glue layer is for this wakeup
functionality, which has a separated interrupt, can support
wakeup from U3 and connect events for host, and vbus wakeup for
device.

Reviewed-by: default avatarKrzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarLi Jun <jun.li@nxp.com>
Link: https://lore.kernel.org/r/1609241866-9508-2-git-send-email-jun.li@nxp.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent cb4d9b52

Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml

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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

# Copyright (c) 2020 NXP

%YAML 1.2

---

$id: http://devicetree.org/schemas/usb/fsl,imx8mp-dwc3.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: NXP iMX8MP Soc USB Controller



maintainers:

  - Li Jun <jun.li@nxp.com>



properties:

  compatible:

    const: fsl,imx8mp-dwc3



  reg:

    maxItems: 1

    description: Address and length of the register set for the wrapper of

      dwc3 core on the SOC.



  "#address-cells":

    enum: [ 1, 2 ]



  "#size-cells":

    enum: [ 1, 2 ]



  dma-ranges:

    description:

      See section 2.3.9 of the DeviceTree Specification.



  ranges: true



  interrupts:

    maxItems: 1

    description: The interrupt that is asserted when a wakeup event is

      received.



  clocks:

    description:

      A list of phandle and clock-specifier pairs for the clocks

      listed in clock-names.

    items:

      - description: system hsio root clock.

      - description: suspend clock, used for usb wakeup logic.



  clock-names:

    items:

      - const: hsio

      - const: suspend



# Required child node:



patternProperties:

  "^dwc3@[0-9a-f]+$":

    type: object

    description:

      A child node must exist to represent the core DWC3 IP block

      The content of the node is defined in dwc3.txt.



required:

  - compatible

  - reg

  - "#address-cells"

  - "#size-cells"

  - dma-ranges

  - ranges

  - clocks

  - clock-names

  - interrupts



additionalProperties: false



examples:

  - |

    #include <dt-bindings/clock/imx8mp-clock.h>

    #include <dt-bindings/interrupt-controller/arm-gic.h>

    usb3_0: usb@32f10100 {

      compatible = "fsl,imx8mp-dwc3";

      reg = <0x32f10100 0x8>;

      clocks = <&clk IMX8MP_CLK_HSIO_ROOT>,

               <&clk IMX8MP_CLK_USB_ROOT>;

      clock-names = "hsio", "suspend";

      interrupts = <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>;

      #address-cells = <1>;

      #size-cells = <1>;

      dma-ranges = <0x40000000 0x40000000 0xc0000000>;

      ranges;



      dwc3@38100000 {

        compatible = "snps,dwc3";

        reg = <0x38100000 0x10000>;

        clocks = <&clk IMX8MP_CLK_HSIO_AXI>,

                 <&clk IMX8MP_CLK_USB_CORE_REF>,

                 <&clk IMX8MP_CLK_USB_ROOT>;

        clock-names = "bus_early", "ref", "suspend";

        assigned-clocks = <&clk IMX8MP_CLK_HSIO_AXI>;

        assigned-clock-parents = <&clk IMX8MP_SYS_PLL2_500M>;

        assigned-clock-rates = <500000000>;

        interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;

        phys = <&usb3_phy0>, <&usb3_phy0>;

        phy-names = "usb2-phy", "usb3-phy";

        snps,dis-u2-freeclk-exists-quirk;

      };

    };