xref: /linux/Documentation/devicetree/bindings/usb/gpio-sbu-mux.yaml (revision 8a922b7728a93d837954315c98b84f6b78de0c4f) 
1# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2%YAML 1.2
3---
4$id: "http://devicetree.org/schemas/usb/gpio-sbu-mux.yaml#"
5$schema: "http://devicetree.org/meta-schemas/core.yaml#"
6
7title: GPIO-based SBU mux
8
9maintainers:
10  - Bjorn Andersson <andersson@kernel.org>
11
12description:
13  In USB Type-C applications the SBU lines needs to be connected, disconnected
14  and swapped depending on the altmode and orientation. This binding describes
15  a family of hardware solutions which switches between these modes using GPIO
16  signals.
17
18properties:
19  compatible:
20    items:
21      - enum:
22          - onnn,fsusb43l10x
23          - pericom,pi3usb102
24      - const: gpio-sbu-mux
25
26  enable-gpios:
27    description: Switch enable GPIO
28
29  select-gpios:
30    description: Orientation select
31
32  vcc-supply:
33    description: power supply
34
35  mode-switch:
36    description: Flag the port as possible handle of altmode switching
37    type: boolean
38
39  orientation-switch:
40    description: Flag the port as possible handler of orientation switching
41    type: boolean
42
43  port:
44    $ref: /schemas/graph.yaml#/properties/port
45    description:
46      A port node to link the SBU mux to a TypeC controller for the purpose of
47      handling altmode muxing and orientation switching.
48
49required:
50  - compatible
51  - enable-gpios
52  - select-gpios
53  - mode-switch
54  - orientation-switch
55  - port
56
57additionalProperties: false
58
59examples:
60  - |
61    #include <dt-bindings/gpio/gpio.h>
62
63    tcpm {
64        connector {
65            compatible = "usb-c-connector";
66
67            ports {
68                #address-cells = <1>;
69                #size-cells = <0>;
70
71                port@0 {
72                    reg = <0>;
73                    tcpm_hs_out: endpoint {
74                        remote-endpoint = <&usb_hs_phy_in>;
75                    };
76                };
77
78                port@1 {
79                    reg = <1>;
80                    tcpm_ss_out: endpoint {
81                        remote-endpoint = <&usb_ss_phy_in>;
82                    };
83                };
84
85                port@2 {
86                    reg = <2>;
87                    tcpm_sbu_out: endpoint {
88                        remote-endpoint = <&sbu_mux_in>;
89                    };
90                };
91            };
92        };
93    };
94
95    sbu-mux {
96        compatible = "pericom,pi3usb102", "gpio-sbu-mux";
97
98        enable-gpios = <&tlmm 101 GPIO_ACTIVE_LOW>;
99        select-gpios = <&tlmm 164 GPIO_ACTIVE_HIGH>;
100
101        mode-switch;
102        orientation-switch;
103
104        port {
105            sbu_mux_in: endpoint {
106                remote-endpoint = <&tcpm_sbu_out>;
107            };
108        };
109    };
110...
111