[PATCH 1/2] dt-bindings: usb: Introduce GPIO-based SBU mux

Bjorn Andersson
2022-08-10T20:45:31Z

Introduce a binding for GPIO-based mux hardware used for connecting,
disconnecting and switching orientation of the SBU lines in USB Type-C
applications.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
.../devicetree/bindings/usb/gpio-sbu-mux.yaml | 77 +++++++++++++++++++
1 file changed, 77 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/gpio-sbu-mux.yaml

diff --git a/Documentation/devicetree/bindings/usb/gpio-sbu-mux.yaml b/Documentation/devicetree/bindings/usb/gpio-sbu-mux.yaml
new file mode 100644
index 000000000000..7d8aca40c7ca
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/gpio-sbu-mux.yaml
@@ -0,0 +1,77 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/usb/gpio-sbu-mux.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: GPIO-based SBU mux
+
+maintainers:
+ - Bjorn Andersson <bjorn.andersson@linaro.org>
+
+description:
+ In USB Type-C applications the SBU lines needs to be connected, disconnected
+ and swapped depending on the altmode and orientation. This binding describes
+ a family of hardware which perform this based on GPIO controls.
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - onnn,fsusb43l10x
+ - pericom,pi3usb102
+ - const: gpio-sbu-mux
+
+ enable-gpios:
+ description: Switch enable GPIO
+
+ select-gpios:
+ description: Orientation select
+
+ vcc-supply:
+ description: power supply
+
+ mode-switch:
+ description: Flag the port as possible handle of altmode switching
+ type: boolean
+
+ orientation-switch:
+ description: Flag the port as possible handler of orientation switching
+ type: boolean
+
+ port:
+ $ref: /schemas/graph.yaml#/properties/port
+ description:
+ A port node to link the SBU mux to a TypeC controller for the purpose of
+ handling altmode muxing and orientation switching.
+
+required:
+ - compatible
+ - enable-gpios
+ - select-gpios
+ - mode-switch
+ - orientation-switch
+ - port
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ sbu-mux {
+ compatible = "pericom,pi3usb102", "gpio-sbu-mux";
+
+ enable-gpios = <&tlmm 101 GPIO_ACTIVE_LOW>;
+ select-gpios = <&tlmm 164 GPIO_ACTIVE_HIGH>;
+
+ mode-switch;
+ orientation-switch;
+
+ port {
+ endpoint {
+ remote-endpoint = <&pmic_glink_dp0_sbu>;
+ };
+ };
+ };
+...
--
2.35.1