On Wed, 27 Oct 2021 14:12:32 +0200, Fabrice Gasnier wrote:

Document the "port" property, which is used with "usb-role-switch"
to describe the bus connector.
Definition is inspired from mediatek,mtu3.yaml.

This fixes some errors seen when running "make dtbs_check":
... 'port' does not match any of the regexes: 'pinctrl-[0-9]+'
        From schema: ... Documentation/devicetree/bindings/usb/dwc2.yaml

Note: add dependencies so that 'usb-role-switch' without port is valid or
both must be present.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
---
Changes in v2:
Rob's review comments:
- drop reference to graph.txt
- drop unneeded quotes
---
 Documentation/devicetree/bindings/usb/dwc2.yaml | 10 ++++++++++
 1 file changed, 10 insertions(+)

Reviewed-by: Rob Herring <robh@kernel.org>