dt-bindings: soc: qcom: Introduce PMIC GLINK binding

The PMIC GLINK service, running on a coprocessor on some modern Qualcomm
platforms and implement USB Type-C handling and battery management.
This binding describes the component in the OS used to communicate with
the firmware and connect it's resources to those described in the
Devicetree, particularly the USB Type-C controllers relationship with
USB and DisplayPort components.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: Konrad Dybcio <konrad.dybcio@linaro.org> # SM8350 PDX215
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230201041853.1934355-2-quic_bjorande@quicinc.com

Documentation/devicetree/bindings/soc/qcom/qcom,pmic-glink.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/qcom/qcom,pmic-glink.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm PMIC GLINK firmware interface for battery management, USB
+  Type-C and other things.
+
+maintainers:
+  - Bjorn Andersson <andersson@kernel.org>
+
+description:
+  The PMIC GLINK service, running on a coprocessor on some modern Qualcomm
+  platforms and implement USB Type-C handling and battery management. This
+  binding describes the component in the OS used to communicate with the
+  firmware and connect it's resources to those described in the Devicetree,
+  particularly the USB Type-C controllers relationship with USB and DisplayPort
+  components.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - qcom,sc8180x-pmic-glink
+          - qcom,sc8280xp-pmic-glink
+          - qcom,sm8350-pmic-glink
+      - const: qcom,pmic-glink
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+patternProperties:
+  '^connector@\d$':
+    $ref: /schemas/connector/usb-connector.yaml#
+
+    properties:
+      reg: true
+
+    required:
+      - reg
+
+    unevaluatedProperties: false
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |+
+    pmic-glink {
+        compatible = "qcom,sc8280xp-pmic-glink", "qcom,pmic-glink";
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        connector@0 {
+            compatible = "usb-c-connector";
+            reg = <0>;
+            power-role = "dual";
+            data-role = "dual";
+
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                port@0 {
+                    reg = <0>;
+                    endpoint {
+                        remote-endpoint = <&usb_role>;
+                    };
+                };
+
+                port@1 {
+                    reg = <1>;
+                    endpoint {
+                        remote-endpoint = <&ss_phy_out>;
+                    };
+                };
+
+                port@2 {
+                    reg = <2>;
+                    endpoint {
+                        remote-endpoint = <&sbu_mux>;
+                    };
+                };
+            };
+        };
+    };
+...
+