Bindings/usb/smsc,usb3503.yaml

   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
   7 title: SMSC USB3503 High-Speed Hub Controller
   8
   9 maintainers:
  10   - Dongjin Kim <tobetter@gmail.com>
  11
  12 properties:
  13   compatible:
  14     enum:
  15       - smsc,usb3503
  16       - smsc,usb3503a
  17       - smsc,usb3803
  18
  19   reg:
  20     maxItems: 1
  21
  22   connect-gpios:
  23     maxItems: 1
  24     description: >
  25       GPIO for connect
  26
  27   intn-gpios:
  28     maxItems: 1
  29     description: >
  30       GPIO for interrupt
  31
  32   reset-gpios:
  33     maxItems: 1
  34     description: >
  35       GPIO for reset
  36
  37   bypass-gpios:
  38     maxItems: 1
  39     description: >
  40       GPIO for bypass.
  41       Control signal to select between HUB MODE and BYPASS MODE.
  42
  43   disabled-ports:
  44     $ref: /schemas/types.yaml#/definitions/uint32-array
  45     minItems: 1
  46     maxItems: 3
  47     items:
  48       minimum: 1
  49       maximum: 3
  50     description: >
  51       Specifies the ports unused using their port number. Do not describe this
  52       property if all ports have to be enabled.
  53
  54   initial-mode:
  55     $ref: /schemas/types.yaml#/definitions/uint32
  56     description: >
  57       Specifies initial mode. 1 for Hub mode, 2 for standby mode and 3 for bypass mode.
  58       In bypass mode the downstream port 3 is connected to the upstream port with low
  59       switch resistance R_on.
  60
  61   clocks:
  62     maxItems: 1
  63     description: >
  64       Clock used for driving REFCLK signal. If not provided the driver assumes
  65       that clock signal is always available, its rate is specified by REF_SEL
  66       pins and a value from the primary reference clock frequencies table is
  67       used.
  68
  69   clock-names:
  70     const: refclk
  71
  72   refclk-frequency:
  73     $ref: /schemas/types.yaml#/definitions/uint32
  74     description: >
  75       Frequency of the REFCLK signal as defined by REF_SEL pins. If not
  76       provided, driver will not set rate of the REFCLK signal and assume that a
  77       value from the primary reference clock frequencies table is used.
  78
  79 required:
  80   - compatible
  81
  82 allOf:
  83   - if:
  84       not:
  85         properties:
  86           compatible:
  87             enum:
  88               - smsc,usb3803
  89     then:
  90       properties:
  91         bypass-gpios: false
  92
  93   - if:
  94       required:
  95         - bypass-gpios
  96     then:
  97       properties:
  98         initial-mode:
  99           enum: [1, 2, 3]
 100     else:
 101       properties:
 102         initial-mode:
 103           enum: [1, 2]
 104
 105 additionalProperties: false
 106
 107 examples:
 108   - |
 109       i2c {
 110           #address-cells = <1>;
 111           #size-cells = <0>;
 112
 113           usb-hub@8 {
 114               compatible = "smsc,usb3503";
 115               reg = <0x08>;
 116               connect-gpios = <&gpx3 0 1>;
 117               disabled-ports = <2 3>;
 118               intn-gpios = <&gpx3 4 1>;
 119               reset-gpios = <&gpx3 5 1>;
 120               initial-mode = <1>;
 121               clocks = <&clks 80>;
 122               clock-names = "refclk";
 123           };
 124       };
 125
 126   - |
 127       i2c {
 128           #address-cells = <1>;
 129           #size-cells = <0>;
 130
 131           usb-hub@8 {
 132               compatible = "smsc,usb3803";
 133               reg = <0x08>;
 134               connect-gpios = <&gpx3 0 1>;
 135               disabled-ports = <2 3>;
 136               intn-gpios = <&gpx3 4 1>;
 137               reset-gpios = <&gpx3 5 1>;
 138               bypass-gpios = <&gpx3 6 1>;
 139               initial-mode = <3>;
 140               clocks = <&clks 80>;
 141               clock-names = "refclk";
 142           };
 143       };
 144
 145   - |
 146       #include <dt-bindings/gpio/gpio.h>
 147
 148       usb-hub {
 149           /* I2C is not connected */
 150           compatible = "smsc,usb3503";
 151           initial-mode = <1>; /* initialize in HUB mode */
 152           disabled-ports = <1>;
 153           intn-gpios = <&pio 7 5 GPIO_ACTIVE_HIGH>; /* PH5 */
 154           reset-gpios = <&pio 4 16 GPIO_ACTIVE_LOW>; /* PE16 */
 155           connect-gpios = <&pio 4 17 GPIO_ACTIVE_HIGH>; /* PE17 */
 156           refclk-frequency = <19200000>;
 157       };
 158
 159 ...