| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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 | ... |