Re: [PATCH v2 5/5] dt-bindings: usb: dwc3-imx8mp: add imx8mp dwc3 glue bindings

[Rob Herring <robh@kernel.org>]

On Mon, Jul 06, 2020 at 05:44:59PM +0800, Li Jun wrote:
> 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.
> 
> Signed-off-by: Li Jun <jun.li@nxp.com>
> ---
>  .../devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml   | 87 ++++++++++++++++++++++
>  1 file changed, 87 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml b/Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml
> new file mode 100644
> index 0000000..823db058
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml
> @@ -0,0 +1,87 @@
> +# 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:
> +    items:
> +    - 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 ]
> +
> +  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: system bus AXI clock.
> +      - description: suspend clock, used for wakeup logic.
> +
> +  clock-names:
> +    items:
> +      - const: hsio
> +      - const: bus
> +      - const: suspend
> +
> +# Required child node:
> +
> +  dwc3:

Needs to be a pattern with the unit-address.

> +    description: This is the node representing the DWC3 controller instance
> +      Documentation/devicetree/bindings/usb/dwc3.txt
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks

Pretty sure you need a few more properties here...

Add:

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_HSIO_AXI_DIV>,
> +               <&clk IMX8MP_CLK_USB_ROOT>;
> +      clock-names = "hsio", "bus", "suspend";
> +      assigned-clocks = <&clk IMX8MP_CLK_HSIO_AXI_SRC>;
> +      assigned-clock-parents = <&clk IMX8MP_SYS_PLL2_500M>;
> +      assigned-clock-rates = <500000000>;
> +      interrupts = <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>;
> +      #address-cells = <1>;
> +      #size-cells = <1>;
> +      ranges;
> +
> +      dwc3@38100000 {
> +        compatible = "snps,dwc3";
> +        reg = <0x38100000 0x10000>;
> +        interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
> +        phys = <&usb3_phy0>, <&usb3_phy0>;
> +        phy-names = "usb2-phy", "usb3-phy";
> +      };
> +    };
> -- 
> 2.7.4
>