On Fri, Feb 7, 2020 at 2:39 PM Prashant Malani <pmalani@xxxxxxxxxxxx> wrote: > > Some Chrome OS devices with Embedded Controllers (EC) can read and > modify Type C port state. > > Add an entry in the DT Bindings documentation that lists out the logical > device and describes the relevant port information, to be used by the > corresponding driver. > > Signed-off-by: Prashant Malani <pmalani@xxxxxxxxxxxx> > --- > > Changes in v2: > - No changes. Patch first introduced in v2 of series. > > .../bindings/chrome/google,cros-ec-typec.yaml | 77 +++++++++++++++++++ > 1 file changed, 77 insertions(+) > create mode 100644 Documentation/devicetree/bindings/chrome/google,cros-ec-typec.yaml > > diff --git a/Documentation/devicetree/bindings/chrome/google,cros-ec-typec.yaml b/Documentation/devicetree/bindings/chrome/google,cros-ec-typec.yaml > new file mode 100644 > index 00000000000000..46ebcbe76db3c2 > --- /dev/null > +++ b/Documentation/devicetree/bindings/chrome/google,cros-ec-typec.yaml > @@ -0,0 +1,77 @@ > +# SPDX-License-Identifier: GPL-2.0 > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/chrome/google,cros-ec-typec.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Google Chrome OS EC(Embedded Controller) Type C port driver. > + > +maintainers: > + - Benson Leung <bleung@xxxxxxxxxxxx> > + - Prashant Malani <pmalani@xxxxxxxxxxxx> > + > +description: > + Chrome OS devices have an Embedded Controller(EC) which has access to > + Type C port state. This node is intended to allow the host to read and > + control the Type C ports. The node for this device should be under a > + cros-ec node like google,cros-ec-spi. > + > +properties: > + compatible: > + const: google,cros-ec-typec > + > + port: > + description: A node that represents a physical Type C port on the > + device. > + type: object > + properties: > + port-number: > + description: The number used by the Chrome OS EC to identify > + this type C port. > + $ref: /schemas/types.yaml#/definitions/uint32 > + power-role: > + description: Determines the power role that the Type C port will > + adopt. > + oneOf: > + - items: > + - const: sink > + - const: source > + - const: dual > + data-role: > + description: Determines the data role that the Type C port will > + adopt. > + oneOf: > + - items: > + - const: host > + - const: device > + - const: dual > + try-power-role: > + description: Determines the preferred power role of the Type C port. > + oneOf: > + - items: > + - const: sink > + - const: source > + - const: dual > + > + required: > + - port-number > + - power-role > + - data-role > + - try-power-role > + > +required: > + - compatible > + - port > + > +examples: > + - |+ > + typec { > + compatible = "google,cros-ec-typec"; > + > + port@0 { 'port' is reserved for OF graph binding which this is not. > + port-number = <0>; > + power-role = "dual"; > + data-role = "dual"; > + try-power-role = "source"; These are usb-connector binding properties, but this is not a usb-connector node. However, I think it should be. The main thing to work out seems to be have multiple connectors. With your binding, how does one associate the USB host controller with each port/connector? That's a solved problem with the connector binding. Rob
