[v4,1/4] dt-bindings: usb: add documentation for typec switch simple driver

Commit Message

Jun Li Oct. 19, 2020, 9:03 a.m. UTC

Some platforms need a simple driver to do some controls according to
typec orientation, this can be extended to be a generic driver with
compatible with "typec-orientation-switch".

Signed-off-by: Li Jun <[e-mail]>
---
changes on v4:
- Use compatible instead of bool property for switch matching.
- Change switch GPIO to be switch simple.
- Change the active channel selection GPIO to be optional.

previsou discussion:
http://patchwork.ozlabs.org/patch/1054342/

 .../bindings/usb/typec-switch-simple.yaml          | 69 ++++++++++++++++++++++
 1 file changed, 69 insertions(+)

Patch

diff --git a/Documentation/devicetree/bindings/usb/typec-switch-simple.yaml b/Documentation/devicetree/bindings/usb/typec-switch-simple.yaml
new file mode 100644
index 0000000..244162d
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/typec-switch-simple.yaml
@@ -0,0 +1,69 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/typec-switch-simple.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Typec Orientation Switch Simple Solution Bindings
+
+maintainers:
+  - Li Jun <[e-mail]>
+
+description: |-
+  USB SuperSpeed (SS) lanes routing to which side of typec connector is
+  decided by orientation, this maybe achieved by some simple control like
+  GPIO toggle.
+
+properties:
+  compatible:
+    const: typec-orientation-switch
+
+  switch-gpios:
+    description: |
+      gpio specifier to switch the super speed active channel,
+      GPIO_ACTIVE_HIGH: GPIO state high for cc1;
+      GPIO_ACTIVE_LOW:  GPIO state low for cc1.
+    maxItems: 1
+
+  port:
+    type: object
+    additionalProperties: false
+    description: -|
+      Connection to the remote endpoint using OF graph bindings that model SS
+      data bus to typec connector.
+
+    properties:
+      endpoint:
+        type: object
+        additionalProperties: false
+
+        properties:
+          remote-endpoint: true
+
+        required:
+          - remote-endpoint
+
+    required:
+      - endpoint
+
+required:
+  - compatible
+  - port
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    ptn36043 {
+        compatible = "typec-orientation-switch";
+        pinctrl-names = "default";
+        pinctrl-0 = <&pinctrl_ss_sel>;
+        switch-gpios = <&gpio3 15 GPIO_ACTIVE_HIGH>;
+
+        port {
+                usb3_data_ss: endpoint {
+                        remote-endpoint = <&typec_con_ss>;
+                };
+        };
+    };