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
7 title: GPIO-based SBU mux
8
9 maintainers:
10 - Bjorn Andersson <andersson@kernel.org>
11
12 description:
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
18 properties:
19 compatible:
20 items:
21 - enum:
22 - nxp,cbdtu02043
23 - onnn,fsusb43l10x
24 - pericom,pi3usb102
25 - ti,tmuxhs4212
26 - const: gpio-sbu-mux
27
28 enable-gpios:
29 description: Switch enable GPIO
30
31 select-gpios:
32 description: Orientation select
33
34 vcc-supply:
35 description: power supply
36
37 mode-switch: true
38 orientation-switch: true
39
40 port:
41 $ref: /schemas/graph.yaml#/properties/port
42 description:
43 A port node to link the SBU mux to a TypeC controller for the purpose of
44 handling altmode muxing and orientation switching.
45
46 required:
47 - compatible
48 - select-gpios
49 - orientation-switch
50 - port
51
52 allOf:
53 - $ref: usb-switch.yaml#
54 - if:
55 required:
56 - mode-switch
57 then:
58 required:
59 - enable-gpios
60
61 additionalProperties: false
62
63 examples:
64 - |
65 #include <dt-bindings/gpio/gpio.h>
66
67 tcpm {
68 connector {
69 compatible = "usb-c-connector";
70
71 ports {
72 #address-cells = <1>;
73 #size-cells = <0>;
74
75 port@0 {
76 reg = <0>;
77 tcpm_hs_out: endpoint {
78 remote-endpoint = <&usb_hs_phy_in>;
79 };
80 };
81
82 port@1 {
83 reg = <1>;
84 tcpm_ss_out: endpoint {
85 remote-endpoint = <&usb_ss_phy_in>;
86 };
87 };
88
89 port@2 {
90 reg = <2>;
91 tcpm_sbu_out: endpoint {
92 remote-endpoint = <&sbu_mux_in>;
93 };
94 };
95 };
96 };
97 };
98
99 sbu-mux {
100 compatible = "pericom,pi3usb102", "gpio-sbu-mux";
101
102 enable-gpios = <&tlmm 101 GPIO_ACTIVE_LOW>;
103 select-gpios = <&tlmm 164 GPIO_ACTIVE_HIGH>;
104
105 mode-switch;
106 orientation-switch;
107
108 port {
109 sbu_mux_in: endpoint {
110 remote-endpoint = <&tcpm_sbu_out>;
111 };
112 };
113 };
114 ...
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