| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame^] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/display/tegra/nvidia,tegra124-dpaux.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: NVIDIA Tegra DisplayPort AUX Interface |
| 8 | |
| 9 | maintainers: |
| 10 | - Thierry Reding <thierry.reding@gmail.com> |
| 11 | - Jon Hunter <jonathanh@nvidia.com> |
| 12 | |
| 13 | description: | |
| 14 | The Tegra Display Port Auxiliary (DPAUX) pad controller manages two |
| 15 | pins which can be assigned to either the DPAUX channel or to an I2C |
| 16 | controller. |
| 17 | |
| 18 | When configured for DisplayPort AUX operation, the DPAUX controller |
| 19 | can also be used to communicate with a DisplayPort device using the |
| 20 | AUX channel. |
| 21 | |
| 22 | properties: |
| 23 | $nodename: |
| 24 | pattern: "^dpaux@[0-9a-f]+$" |
| 25 | |
| 26 | compatible: |
| 27 | oneOf: |
| 28 | - enum: |
| 29 | - nvidia,tegra124-dpaux |
| 30 | - nvidia,tegra210-dpaux |
| 31 | - nvidia,tegra186-dpaux |
| 32 | - nvidia,tegra194-dpaux |
| 33 | |
| 34 | - items: |
| 35 | - const: nvidia,tegra132-dpaux |
| 36 | - const: nvidia,tegra124-dpaux |
| 37 | |
| 38 | reg: |
| 39 | maxItems: 1 |
| 40 | |
| 41 | interrupts: |
| 42 | maxItems: 1 |
| 43 | |
| 44 | clocks: |
| 45 | items: |
| 46 | - description: clock input for the DPAUX hardware |
| 47 | - description: reference clock |
| 48 | |
| 49 | clock-names: |
| 50 | items: |
| 51 | - const: dpaux |
| 52 | - const: parent |
| 53 | |
| 54 | resets: |
| 55 | items: |
| 56 | - description: module reset |
| 57 | |
| 58 | reset-names: |
| 59 | items: |
| 60 | - const: dpaux |
| 61 | |
| 62 | power-domains: |
| 63 | maxItems: 1 |
| 64 | |
| 65 | i2c-bus: |
| 66 | description: Subnode where I2C slave devices are listed. This |
| 67 | subnode must be always present. If there are no I2C slave |
| 68 | devices, an empty node should be added. See ../../i2c/i2c.yaml |
| 69 | for more information. |
| 70 | type: object |
| 71 | |
| 72 | aux-bus: |
| 73 | $ref: /schemas/display/dp-aux-bus.yaml# |
| 74 | |
| 75 | vdd-supply: |
| 76 | description: phandle of a supply that powers the DisplayPort |
| 77 | link |
| 78 | |
| 79 | patternProperties: |
| 80 | "^pinmux-[a-z0-9]+$": |
| 81 | description: |
| 82 | Since only three configurations are possible, only three child |
| 83 | nodes are needed to describe the pin mux'ing options for the |
| 84 | DPAUX pads. Furthermore, given that the pad functions are only |
| 85 | applicable to a single set of pads, the child nodes only need |
| 86 | to describe the pad group the functions are being applied to |
| 87 | rather than the individual pads. |
| 88 | type: object |
| 89 | properties: |
| 90 | groups: |
| 91 | const: dpaux-io |
| 92 | |
| 93 | function: |
| 94 | enum: |
| 95 | - aux |
| 96 | - i2c |
| 97 | - off |
| 98 | |
| 99 | additionalProperties: false |
| 100 | |
| 101 | required: |
| 102 | - groups |
| 103 | - function |
| 104 | |
| 105 | additionalProperties: false |
| 106 | |
| 107 | required: |
| 108 | - compatible |
| 109 | - reg |
| 110 | - interrupts |
| 111 | - clocks |
| 112 | - clock-names |
| 113 | - resets |
| 114 | - reset-names |
| 115 | |
| 116 | examples: |
| 117 | - | |
| 118 | #include <dt-bindings/clock/tegra210-car.h> |
| 119 | #include <dt-bindings/interrupt-controller/arm-gic.h> |
| 120 | |
| 121 | dpaux: dpaux@545c0000 { |
| 122 | compatible = "nvidia,tegra210-dpaux"; |
| 123 | reg = <0x545c0000 0x00040000>; |
| 124 | interrupts = <GIC_SPI 159 IRQ_TYPE_LEVEL_HIGH>; |
| 125 | clocks = <&tegra_car TEGRA210_CLK_DPAUX>, |
| 126 | <&tegra_car TEGRA210_CLK_PLL_DP>; |
| 127 | clock-names = "dpaux", "parent"; |
| 128 | resets = <&tegra_car 181>; |
| 129 | reset-names = "dpaux"; |
| 130 | power-domains = <&pd_sor>; |
| 131 | |
| 132 | state_dpaux_aux: pinmux-aux { |
| 133 | groups = "dpaux-io"; |
| 134 | function = "aux"; |
| 135 | }; |
| 136 | |
| 137 | state_dpaux_i2c: pinmux-i2c { |
| 138 | groups = "dpaux-io"; |
| 139 | function = "i2c"; |
| 140 | }; |
| 141 | |
| 142 | state_dpaux_off: pinmux-off { |
| 143 | groups = "dpaux-io"; |
| 144 | function = "off"; |
| 145 | }; |
| 146 | |
| 147 | i2c-bus { |
| 148 | #address-cells = <1>; |
| 149 | #size-cells = <0>; |
| 150 | }; |
| 151 | }; |