xref: /linux/Documentation/devicetree/bindings/usb/smsc,usb3503.yaml (revision f777316e52e14059a6a1df45cbf39a93ac49a593) 
1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/usb/smsc,usb3503.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: SMSC USB3503 High-Speed Hub Controller Device Tree Bindings
8
9maintainers:
10  - Dongjin Kim <tobetter@gmail.com>
11
12properties:
13  compatible:
14    enum:
15      - smsc,usb3503
16      - smsc,usb3503a
17
18  reg:
19    maxItems: 1
20
21  connect-gpios:
22    maxItems: 1
23    description: >
24      GPIO for connect
25
26  intn-gpios:
27    maxItems: 1
28    description: >
29      GPIO for interrupt
30
31  reset-gpios:
32    maxItems: 1
33    description: >
34      GPIO for reset
35
36  disabled-ports:
37    $ref: /schemas/types.yaml#/definitions/uint32-array
38    minItems: 1
39    maxItems: 3
40    items:
41      minimum: 1
42      maximum: 3
43    description: >
44      Specifies the ports unused using their port number. Do not describe this
45      property if all ports have to be enabled.
46
47  initial-mode:
48    $ref: /schemas/types.yaml#/definitions/uint32
49    enum: [1, 2]
50    description: >
51      Specifies initial mode. 1 for Hub mode, 2 for standby mode.
52
53  clocks:
54    maxItems: 1
55    description: >
56      Clock used for driving REFCLK signal. If not provided the driver assumes
57      that clock signal is always available, its rate is specified by REF_SEL
58      pins and a value from the primary reference clock frequencies table is
59      used.
60
61  clock-names:
62    const: refclk
63
64  refclk-frequency:
65    $ref: /schemas/types.yaml#/definitions/uint32
66    description: >
67      Frequency of the REFCLK signal as defined by REF_SEL pins. If not
68      provided, driver will not set rate of the REFCLK signal and assume that a
69      value from the primary reference clock frequencies table is used.
70
71required:
72  - compatible
73
74additionalProperties: false
75
76examples:
77  - |
78      i2c {
79          #address-cells = <1>;
80          #size-cells = <0>;
81
82          usb-hub@8 {
83              compatible = "smsc,usb3503";
84              reg = <0x08>;
85              connect-gpios = <&gpx3 0 1>;
86              disabled-ports = <2 3>;
87              intn-gpios = <&gpx3 4 1>;
88              reset-gpios = <&gpx3 5 1>;
89              initial-mode = <1>;
90              clocks = <&clks 80>;
91              clock-names = "refclk";
92          };
93      };
94
95  - |
96      #include <dt-bindings/gpio/gpio.h>
97
98      usb-hub {
99          /* I2C is not connected */
100          compatible = "smsc,usb3503";
101          initial-mode = <1>; /* initialize in HUB mode */
102          disabled-ports = <1>;
103          intn-gpios = <&pio 7 5 GPIO_ACTIVE_HIGH>; /* PH5 */
104          reset-gpios = <&pio 4 16 GPIO_ACTIVE_LOW>; /* PE16 */
105          connect-gpios = <&pio 4 17 GPIO_ACTIVE_HIGH>; /* PE17 */
106          refclk-frequency = <19200000>;
107      };
108
109...
110