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Commit 05da213f authored by Mikko Perttunen's avatar Mikko Perttunen Committed by Greg Kroah-Hartman
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dt-bindings: serial: Add bindings for nvidia,tegra194-tcu 



Add bindings for the Tegra Combined UART device used to talk to the
UART console on Tegra194 systems.

Signed-off-by: default avatarMikko Perttunen <mperttunen@nvidia.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Acked-by: default avatarJon Hunter <jonathanh@nvidia.com>
Acked-by: default avatarThierry Reding <treding@nvidia.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e81eba88

Documentation/devicetree/bindings/serial/nvidia,tegra194-tcu.txt

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NVIDIA Tegra Combined UART (TCU)



The TCU is a system for sharing a hardware UART instance among multiple

systems within the Tegra SoC. It is implemented through a mailbox-

based protocol where each "virtual UART" has a pair of mailboxes, one

for transmitting and one for receiving, that is used to communicate

with the hardware implementing the TCU.



Required properties:

- name : Should be tcu

- compatible

    Array of strings

    One of:

    - "nvidia,tegra194-tcu"

- mbox-names:

    "rx" - Mailbox for receiving data from hardware UART

    "tx" - Mailbox for transmitting data to hardware UART

- mboxes: Mailboxes corresponding to the mbox-names.



This node is a mailbox consumer. See the following files for details of

the mailbox subsystem, and the specifiers implemented by the relevant

provider(s):



- .../mailbox/mailbox.txt

- .../mailbox/nvidia,tegra186-hsp.txt



Example bindings:

-----------------



tcu: tcu {

	compatible = "nvidia,tegra194-tcu";

	mboxes = <&hsp_top0 TEGRA_HSP_MBOX_TYPE_SM 0>,

	         <&hsp_aon TEGRA_HSP_MBOX_TYPE_SM 1>;

	mbox-names = "rx", "tx";

};