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Message-ID: <20230113041115.4189210-1-quic_bjorande@quicinc.com>
Date: Thu, 12 Jan 2023 20:11:14 -0800
From: Bjorn Andersson <quic_bjorande@...cinc.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
Bjorn Andersson <andersson@...nel.org>
CC: <linux-usb@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
Subject: [PATCH v2 1/2] dt-bindings: usb: Introduce GPIO-based SBU mux
From: Bjorn Andersson <bjorn.andersson@...aro.org>
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@...aro.org>
Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
---
Changes since v1:
- Expanded the example to indicate how this fits with the TCPM
- Updated maintainer email address.
.../devicetree/bindings/usb/gpio-sbu-mux.yaml | 110 ++++++++++++++++++
1 file changed, 110 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..bf4b1d016e1f
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/gpio-sbu-mux.yaml
@@ -0,0 +1,110 @@
+# 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 <andersson@...nel.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 solutions which switches between these modes using GPIO
+ signals.
+
+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>
+
+ tcpm {
+ connector {
+ compatible = "usb-c-connector";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ tcpm_hs_out: endpoint {
+ remote-endpoint = <&usb_hs_phy_in>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+ tcpm_ss_out: endpoint {
+ remote-endpoint = <&usb_ss_phy_in>;
+ };
+ };
+
+ port@2 {
+ reg = <2>;
+ tcpm_sbu_out: endpoint {
+ remote-endpoint = <&sbu_mux_in>;
+ };
+ };
+ };
+ };
+ };
+
+ 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 {
+ sbu_mux_in: endpoint {
+ remote-endpoint = <&tcpm_sbu_out>;
+ };
+ };
+ };
+...
--
2.37.3
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