c66ec88fed
git-subtree-dir: sys/contrib/device-tree git-subtree-mainline:94611a8388git-subtree-split:5ee353c36d
36 lines
1.1 KiB
Plaintext
36 lines
1.1 KiB
Plaintext
NVIDIA Tegra Combined UART (TCU)
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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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Required properties:
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- name : Should be tcu
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- compatible
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Array of strings
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One of:
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- "nvidia,tegra194-tcu"
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- mbox-names:
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"rx" - Mailbox for receiving data from hardware UART
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"tx" - Mailbox for transmitting data to hardware UART
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- mboxes: Mailboxes corresponding to the mbox-names.
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This node is a mailbox consumer. See the following files for details of
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the mailbox subsystem, and the specifiers implemented by the relevant
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provider(s):
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- .../mailbox/mailbox.txt
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- .../mailbox/nvidia,tegra186-hsp.txt
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Example bindings:
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-----------------
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tcu: tcu {
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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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