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|
# 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>;
};
};
|
