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| 1 | +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | +%YAML 1.2 |
| 3 | +--- |
| 4 | +$id: http://devicetree.org/schemas/phy/apm,xgene-phy.yaml# |
| 5 | +$schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | + |
| 7 | +title: APM X-Gene 15Gbps Multi-purpose PHY |
| 8 | + |
| 9 | +maintainers: |
| 10 | + |
| 11 | + |
| 12 | +description: |
| 13 | + PHY nodes are defined to describe on-chip 15Gbps Multi-purpose PHY. Each |
| 14 | + PHY (pair of lanes) has its own node. |
| 15 | + |
| 16 | +properties: |
| 17 | + compatible: |
| 18 | + items: |
| 19 | + - const: apm,xgene-phy |
| 20 | + |
| 21 | + reg: |
| 22 | + maxItems: 1 |
| 23 | + |
| 24 | + '#phy-cells': |
| 25 | + description: |
| 26 | + Possible values are 0 (SATA), 1 (SGMII), 2 (PCIe), 3 (USB), and 4 (XFI). |
| 27 | + const: 1 |
| 28 | + |
| 29 | + clocks: |
| 30 | + maxItems: 1 |
| 31 | + |
| 32 | + apm,tx-eye-tuning: |
| 33 | + description: |
| 34 | + Manual control to fine tune the capture of the serial bit lines from the |
| 35 | + automatic calibrated position. Two set of 3-tuple setting for each |
| 36 | + supported link speed on the host. Range from 0 to 127 in unit of one bit |
| 37 | + period. |
| 38 | + $ref: /schemas/types.yaml#/definitions/uint32-matrix |
| 39 | + minItems: 2 |
| 40 | + maxItems: 2 |
| 41 | + items: |
| 42 | + minItems: 3 |
| 43 | + maxItems: 3 |
| 44 | + items: |
| 45 | + minimum: 0 |
| 46 | + maximum: 127 |
| 47 | + default: 10 |
| 48 | + |
| 49 | + apm,tx-eye-direction: |
| 50 | + description: |
| 51 | + Eye tuning manual control direction. 0 means sample data earlier than the |
| 52 | + nominal sampling point. 1 means sample data later than the nominal |
| 53 | + sampling point. Two set of 3-tuple setting for each supported link speed |
| 54 | + on the host. |
| 55 | + $ref: /schemas/types.yaml#/definitions/uint32-matrix |
| 56 | + minItems: 2 |
| 57 | + maxItems: 2 |
| 58 | + items: |
| 59 | + minItems: 3 |
| 60 | + maxItems: 3 |
| 61 | + items: |
| 62 | + enum: [0, 1] |
| 63 | + default: 0 |
| 64 | + |
| 65 | + apm,tx-boost-gain: |
| 66 | + description: |
| 67 | + Frequency boost AC (LSB 3-bit) and DC (2-bit) gain control. Two set of |
| 68 | + 3-tuple setting for each supported link speed on the host. Range is |
| 69 | + between 0 to 31 in unit of dB. Default is 3. |
| 70 | + $ref: /schemas/types.yaml#/definitions/uint32-matrix |
| 71 | + minItems: 2 |
| 72 | + maxItems: 2 |
| 73 | + items: |
| 74 | + minItems: 3 |
| 75 | + maxItems: 3 |
| 76 | + items: |
| 77 | + minimum: 0 |
| 78 | + maximum: 31 |
| 79 | + |
| 80 | + apm,tx-amplitude: |
| 81 | + description: |
| 82 | + Amplitude control. Two set of 3-tuple setting for each supported link |
| 83 | + speed on the host. Range is between 0 to 199500 in unit of uV. |
| 84 | + $ref: /schemas/types.yaml#/definitions/uint32-matrix |
| 85 | + minItems: 2 |
| 86 | + maxItems: 2 |
| 87 | + items: |
| 88 | + minItems: 3 |
| 89 | + maxItems: 3 |
| 90 | + items: |
| 91 | + minimum: 0 |
| 92 | + maximum: 199500 |
| 93 | + default: 199500 |
| 94 | + |
| 95 | + apm,tx-pre-cursor1: |
| 96 | + description: |
| 97 | + 1st pre-cursor emphasis taps control. Two set of 3-tuple setting for |
| 98 | + each supported link speed on the host. Range is 0 to 273000 in unit of |
| 99 | + uV. |
| 100 | + $ref: /schemas/types.yaml#/definitions/uint32-matrix |
| 101 | + minItems: 2 |
| 102 | + maxItems: 2 |
| 103 | + items: |
| 104 | + minItems: 3 |
| 105 | + maxItems: 3 |
| 106 | + items: |
| 107 | + minimum: 0 |
| 108 | + maximum: 273000 |
| 109 | + default: 0 |
| 110 | + |
| 111 | + apm,tx-pre-cursor2: |
| 112 | + description: |
| 113 | + 2nd pre-cursor emphasis taps control. Two set of 3-tuple setting for |
| 114 | + each supported link speed on the host. Range is 0 to 127400 in unit uV. |
| 115 | + $ref: /schemas/types.yaml#/definitions/uint32-matrix |
| 116 | + minItems: 2 |
| 117 | + maxItems: 2 |
| 118 | + items: |
| 119 | + minItems: 3 |
| 120 | + maxItems: 3 |
| 121 | + items: |
| 122 | + minimum: 0 |
| 123 | + maximum: 127400 |
| 124 | + default: 0 |
| 125 | + |
| 126 | + apm,tx-post-cursor: |
| 127 | + description: | |
| 128 | + Post-cursor emphasis taps control. Two set of 3-tuple setting for Gen1, |
| 129 | + Gen2, and Gen3 link speeds. Range is between 0 to 31 in unit of 18.2mV. |
| 130 | + $ref: /schemas/types.yaml#/definitions/uint32-matrix |
| 131 | + minItems: 2 |
| 132 | + maxItems: 2 |
| 133 | + items: |
| 134 | + minItems: 3 |
| 135 | + maxItems: 3 |
| 136 | + items: |
| 137 | + minimum: 0 |
| 138 | + maximum: 31 |
| 139 | + default: 0xf |
| 140 | + |
| 141 | + apm,tx-speed: |
| 142 | + description: > |
| 143 | + Tx operating speed. One set of 3-tuple for each supported link speed on |
| 144 | + the host: |
| 145 | +
|
| 146 | + 0 = 1-2Gbps |
| 147 | + 1 = 2-4Gbps (1st tuple default) |
| 148 | + 2 = 4-8Gbps |
| 149 | + 3 = 8-15Gbps (2nd tuple default) |
| 150 | + 4 = 2.5-4Gbps |
| 151 | + 5 = 4-5Gbps |
| 152 | + 6 = 5-6Gbps |
| 153 | + 7 = 6-16Gbps (3rd tuple default). |
| 154 | +
|
| 155 | + $ref: /schemas/types.yaml#/definitions/uint32-array |
| 156 | + minItems: 3 |
| 157 | + maxItems: 3 |
| 158 | + items: |
| 159 | + maximum: 7 |
| 160 | + |
| 161 | +additionalProperties: false |
| 162 | + |
| 163 | +examples: |
| 164 | + - | |
| 165 | + phy@1f21a000 { |
| 166 | + compatible = "apm,xgene-phy"; |
| 167 | + reg = <0x1f21a000 0x100>; |
| 168 | + #phy-cells = <1>; |
| 169 | + }; |
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