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