[v7,2/4] dt-bindings: usb: Add Qualcomm PMIC type C controller dt-binding

Introduce the dt-binding for enabling USB type C orientation and role
detection using the PM8150B.  The driver will be responsible for receiving
the interrupt at a state change on the CC lines, reading the
orientation/role, and communicating this information to the remote
clients, which can include a role switch node and a type C switch.

Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
---
 .../bindings/usb/qcom,pmic-typec.yaml         | 131 ++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/qcom,pmic-typec.yaml

On Mon, Aug 03, 2020 at 05:45:21PM -0700, Wesley Cheng wrote:
> Introduce the dt-binding for enabling USB type C orientation and role
> detection using the PM8150B.  The driver will be responsible for receiving
> the interrupt at a state change on the CC lines, reading the
> orientation/role, and communicating this information to the remote
> clients, which can include a role switch node and a type C switch.
> 
> Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
> ---
>  .../bindings/usb/qcom,pmic-typec.yaml         | 131 ++++++++++++++++++
>  1 file changed, 131 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/usb/qcom,pmic-typec.yaml
> 
> diff --git a/Documentation/devicetree/bindings/usb/qcom,pmic-typec.yaml b/Documentation/devicetree/bindings/usb/qcom,pmic-typec.yaml
> new file mode 100644
> index 000000000000..877e979f413f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/qcom,pmic-typec.yaml
> @@ -0,0 +1,131 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/usb/qcom,pmic-typec.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Qualcomm PMIC based USB type C Detection Driver
> +
> +maintainers:
> +  - Wesley Cheng <wcheng@codeaurora.org>
> +
> +description: |
> +  Qualcomm PMIC Type C Detect
> +
> +properties:
> +  compatible:
> +    enum:
> +      - qcom,pm8150b-usb-typec
> +
> +  reg:
> +    maxItems: 1
> +    description: Type C base address
> +
> +  interrupts:
> +    maxItems: 1
> +    description: CC change interrupt from PMIC
> +
> +  connector:
> +    description: Connector type for remote endpoints
> +    type: object
> +
> +    properties:
> +      compatible:
> +        $ref: /schemas/connector/usb-connector.yaml#/properties/compatible

usb-connector.yaml should be referenced from 'connector'.

> +        enum:
> +          - usb-c-connector
> +
> +      power-role:
> +        $ref: /schemas/connector/usb-connector.yaml#/properties/power-role
> +        enum:
> +         - dual
> +         - source
> +         - sink

Just 'power-role: true' is enough as this is the same set of possible 
values.

> +
> +      data-role:
> +        $ref: /schemas/connector/usb-connector.yaml#/properties/data-role
> +        enum:
> +          - dual
> +          - host
> +          - device

Same here

> +
> +      ports:
> +        description: Remote endpoint connections
> +        type: object
> +        $ref: /schemas/connector/usb-connector.yaml#/properties/ports
> +
> +        properties:
> +          port@0:
> +            description: Remote endpoints for the High Speed path
> +            type: object
> +
> +          port@1:
> +            description: Remote endpoints for the Super Speed path
> +            type: object
> +
> +            properties:
> +              endpoint@0:
> +                description: Connection to USB type C mux node
> +                type: object
> +
> +                properties:
> +                  remote-endpoint:
> +                    description: Node reference to the type C mux

You don't need to describe 'remote-endpoint'. You can assume that is 
defined in a common graph schema (to be written).

> +
> +              endpoint@1:
> +                description: Connection to role switch node
> +                type: object
> +
> +                properties:
> +                  remote-endpoint:
> +                    description: Node reference to the role switch node
> +
> +    required:
> +      - compatible
> +
> +required:
> +  - compatible
> +  - interrupts
> +  - connector
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    pm8150b {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +        pm8150b_typec: typec@1500 {
> +            compatible = "qcom,pm8150b-usb-typec";
> +            reg = <0x1500>;
> +            interrupts = <0x2 0x15 0x5 IRQ_TYPE_EDGE_RISING>;
> +
> +            connector {
> +                compatible = "usb-c-connector";
> +                power-role = "dual";
> +                data-role = "dual";
> +                ports {
> +                    #address-cells = <1>;
> +                    #size-cells = <0>;
> +                    port@0 {
> +                        reg = <0>;
> +                    };
> +                    port@1 {
> +                        reg = <1>;
> +                        #address-cells = <1>;
> +                        #size-cells = <0>;
> +                        usb3_data_ss: endpoint@0 {
> +                            reg = <0>;
> +                            remote-endpoint = <&qmp_ss_mux>;
> +                        };
> +                        usb3_role: endpoint@1 {
> +                            reg = <1>;
> +                            remote-endpoint = <&dwc3_drd_switch>;
> +                        };
> +                    };
> +                };
> +            };
> +        };
> +    };
> +...
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>