[PATCH v5 10/19] dt-bindings: usb: Convert DWC USB3 bindings to DT schema

[Chunfeng Yun]

On Sat, 2020-12-05 at 18:24 +0300, Serge Semin wrote:
> DWC USB3 DT node is supposed to be compliant with the Generic xHCI
> Controller schema, but with additional vendor-specific properties, the
> controller-specific reference clocks and PHYs. So let's convert the
> currently available legacy text-based DWC USB3 bindings to the DT schema
> and make sure the DWC USB3 nodes are also validated against the
> usb-xhci.yaml schema.
> 
> Note 1. we have to discard the nodename restriction of being prefixed with
> "dwc3@" string, since in accordance with the usb-hcd.yaml schema USB nodes
> are supposed to be named as "^usb(@.*)".
> 
> Note 2. The clock-related properties are marked as optional to match the
> DWC USB3 driver expectation and to improve the bindings mainainability
> so in case if there is a glue-node it would the responsible for the
> clocks initialization.
> 
> Signed-off-by: Serge Semin <Sergey.Semin at baikalelectronics.ru>
> 
> ---
> 
> Changelog v2:
> - Discard '|' from the descriptions, since we don't need to preserve
>   the text formatting in any of them.
> - Drop quotes from around the string constants.
> - Fix the "clock-names" prop description to be referring the enumerated
>   clock-names instead of the ones from the Databook.
> 
> Changelog v3:
> - Apply usb-xhci.yaml# schema only if the controller is supposed to work
>   as either host or otg.
> 
> Changelog v4:
> - Apply usb-drd.yaml schema first. If the controller is configured
>   to work in a gadget mode only, then apply the usb.yaml schema too,
>   otherwise apply the usb-xhci.yaml schema.
> - Discard the Rob'es Reviewed-by tag. Please review the patch one more
>   time.
> 
> Changelog v5:
> - Add "snps,dis-split-quirk" property to the DWC USB3 DT schema.
> - Add a commit log text about the clock-related property changes.
> - Make sure dr_mode exist to apply the USB-gadget-only schema.
> ---
>  .../devicetree/bindings/usb/dwc3.txt          | 128 -------
>  .../devicetree/bindings/usb/snps,dwc3.yaml    | 312 ++++++++++++++++++
>  2 files changed, 312 insertions(+), 128 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/usb/dwc3.txt
>  create mode 100644 Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> 
> diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt
> deleted file mode 100644
> index 1aae2b6160c1..000000000000
> --- a/Documentation/devicetree/bindings/usb/dwc3.txt
> +++ /dev/null
> @@ -1,128 +0,0 @@
> -synopsys DWC3 CORE
> -
[...]
> +
> +  clock-names:
> +    contains:
> +      anyOf:
> +        - enum: [bus_early, ref, suspend]
> +        - true
> +
> +  usb-phy:
> +   minItems: 1
indentation: expected 4
> +   items:
> +     - description: USB2/HS PHY
> +     - description: USB3/SS PHY
> +
> +  phys:
> +    minItems: 1
> +    items:
> +      - description: USB2/HS PHY
> +      - description: USB3/SS PHY
> +
> +  phy-names:
> +    minItems: 1
> +    items:
> +      - const: usb2-phy
> +      - const: usb3-phy
[...]