nvidia,tegra194-tcu.yaml

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    1 # SPDX-License-Identifier: GPL-2.0
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/serial/nvidia,tegra194-tcu.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: NVIDIA Tegra Combined UART (TCU)
    8 
    9 maintainers:
   10   - Thierry Reding <thierry.reding@gmail.com>
   11   - Jonathan Hunter <jonathanh@nvidia.com>
   12 
   13 description:
   14   The TCU is a system for sharing a hardware UART instance among multiple
   15   systems within the Tegra SoC. It is implemented through a mailbox-
   16   based protocol where each "virtual UART" has a pair of mailboxes, one
   17   for transmitting and one for receiving, that is used to communicate
   18   with the hardware implementing the TCU.
   19 
   20 properties:
   21   $nodename:
   22     pattern: "^serial(@.*)?$"
   23 
   24   compatible:
   25     oneOf:
   26       - const: nvidia,tegra194-tcu
   27       - items:
   28           - enum:
   29               - nvidia,tegra234-tcu
   30           - const: nvidia,tegra194-tcu
   31 
   32   mbox-names:
   33     items:
   34       - const: rx
   35       - const: tx
   36 
   37   mboxes:
   38     description: |
   39       List of phandles to mailbox channels used for receiving and
   40       transmitting data from and to the hardware UART.
   41     items:
   42       - description: mailbox for receiving data from hardware UART
   43       - description: mailbox for transmitting data to hardware UART
   44 
   45 required:
   46   - compatible
   47   - mbox-names
   48   - mboxes
   49 
   50 additionalProperties: false
   51 
   52 examples:
   53   - |
   54     #include <dt-bindings/mailbox/tegra186-hsp.h>
   55 
   56     tcu: serial {
   57         compatible = "nvidia,tegra194-tcu";
   58         mboxes = <&hsp_top0 TEGRA_HSP_MBOX_TYPE_SM 0>,
   59                  <&hsp_aon TEGRA_HSP_MBOX_TYPE_SM 1>;
   60         mbox-names = "rx", "tx";
   61     };

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sys/contrib/device-tree/Bindings/serial/nvidia,tegra194-tcu.yaml