62 lines
1.6 KiB
YAML
62 lines
1.6 KiB
YAML
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# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/serial/nvidia,tegra194-tcu.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: NVIDIA Tegra Combined UART (TCU)
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maintainers:
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- Thierry Reding <thierry.reding@gmail.com>
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- Jonathan Hunter <jonathanh@nvidia.com>
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description:
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The TCU is a system for sharing a hardware UART instance among multiple
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systems within the Tegra SoC. It is implemented through a mailbox-
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based protocol where each "virtual UART" has a pair of mailboxes, one
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for transmitting and one for receiving, that is used to communicate
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with the hardware implementing the TCU.
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properties:
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$nodename:
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pattern: "^serial(@.*)?$"
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compatible:
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oneOf:
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- const: nvidia,tegra194-tcu
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- items:
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- enum:
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- nvidia,tegra234-tcu
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- const: nvidia,tegra194-tcu
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mbox-names:
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items:
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- const: rx
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- const: tx
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mboxes:
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description: |
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List of phandles to mailbox channels used for receiving and
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transmitting data from and to the hardware UART.
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items:
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- description: mailbox for receiving data from hardware UART
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- description: mailbox for transmitting data to hardware UART
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required:
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- compatible
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- mbox-names
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- mboxes
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/mailbox/tegra186-hsp.h>
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tcu: serial {
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compatible = "nvidia,tegra194-tcu";
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mboxes = <&hsp_top0 TEGRA_HSP_MBOX_TYPE_SM 0>,
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<&hsp_aon TEGRA_HSP_MBOX_TYPE_SM 1>;
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mbox-names = "rx", "tx";
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};
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