| # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/display/tegra/nvidia,tegra124-dpaux.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: NVIDIA Tegra DisplayPort AUX Interface |
| |
| maintainers: |
| - Thierry Reding <thierry.reding@gmail.com> |
| - Jon Hunter <jonathanh@nvidia.com> |
| |
| description: | |
| The Tegra Display Port Auxiliary (DPAUX) pad controller manages two |
| pins which can be assigned to either the DPAUX channel or to an I2C |
| controller. |
| |
| When configured for DisplayPort AUX operation, the DPAUX controller |
| can also be used to communicate with a DisplayPort device using the |
| AUX channel. |
| |
| properties: |
| $nodename: |
| pattern: "^dpaux@[0-9a-f]+$" |
| |
| compatible: |
| oneOf: |
| - enum: |
| - nvidia,tegra124-dpaux |
| - nvidia,tegra210-dpaux |
| - nvidia,tegra186-dpaux |
| - nvidia,tegra194-dpaux |
| |
| - items: |
| - const: nvidia,tegra132-dpaux |
| - const: nvidia,tegra124-dpaux |
| |
| reg: |
| maxItems: 1 |
| |
| interrupts: |
| maxItems: 1 |
| |
| clocks: |
| items: |
| - description: clock input for the DPAUX hardware |
| - description: reference clock |
| |
| clock-names: |
| items: |
| - const: dpaux |
| - const: parent |
| |
| resets: |
| items: |
| - description: module reset |
| |
| reset-names: |
| items: |
| - const: dpaux |
| |
| power-domains: |
| maxItems: 1 |
| |
| i2c-bus: |
| description: Subnode where I2C slave devices are listed. This |
| subnode must be always present. If there are no I2C slave |
| devices, an empty node should be added. See ../../i2c/i2c.yaml |
| for more information. |
| type: object |
| |
| aux-bus: |
| $ref: /schemas/display/dp-aux-bus.yaml# |
| |
| vdd-supply: |
| description: phandle of a supply that powers the DisplayPort |
| link |
| |
| patternProperties: |
| "^pinmux-[a-z0-9]+$": |
| description: |
| Since only three configurations are possible, only three child |
| nodes are needed to describe the pin mux'ing options for the |
| DPAUX pads. Furthermore, given that the pad functions are only |
| applicable to a single set of pads, the child nodes only need |
| to describe the pad group the functions are being applied to |
| rather than the individual pads. |
| type: object |
| properties: |
| groups: |
| const: dpaux-io |
| |
| function: |
| enum: |
| - aux |
| - i2c |
| - off |
| |
| additionalProperties: false |
| |
| required: |
| - groups |
| - function |
| |
| additionalProperties: false |
| |
| required: |
| - compatible |
| - reg |
| - interrupts |
| - clocks |
| - clock-names |
| - resets |
| - reset-names |
| |
| examples: |
| - | |
| #include <dt-bindings/clock/tegra210-car.h> |
| #include <dt-bindings/interrupt-controller/arm-gic.h> |
| |
| dpaux: dpaux@545c0000 { |
| compatible = "nvidia,tegra210-dpaux"; |
| reg = <0x545c0000 0x00040000>; |
| interrupts = <GIC_SPI 159 IRQ_TYPE_LEVEL_HIGH>; |
| clocks = <&tegra_car TEGRA210_CLK_DPAUX>, |
| <&tegra_car TEGRA210_CLK_PLL_DP>; |
| clock-names = "dpaux", "parent"; |
| resets = <&tegra_car 181>; |
| reset-names = "dpaux"; |
| power-domains = <&pd_sor>; |
| status = "disabled"; |
| |
| state_dpaux_aux: pinmux-aux { |
| groups = "dpaux-io"; |
| function = "aux"; |
| }; |
| |
| state_dpaux_i2c: pinmux-i2c { |
| groups = "dpaux-io"; |
| function = "i2c"; |
| }; |
| |
| state_dpaux_off: pinmux-off { |
| groups = "dpaux-io"; |
| function = "off"; |
| }; |
| |
| i2c-bus { |
| #address-cells = <1>; |
| #size-cells = <0>; |
| }; |
| }; |