dt-bindings: usb: Convert DWC USB3 bindings to DT schema
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. Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Link: https://lore.kernel.org/r/20201210090944.16283-11-Sergey.Semin@baikalelectronics.ruSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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