On Tue, May 08, 2018 at 02:43:57PM +0300, Mikko Perttunen wrote:
> Add bindings for the Tegra Combined UART device used to talk to the
> UART console on Tegra194 systems.
>
> Signed-off-by: Mikko Perttunen <mperttunen@xxxxxxxxxx>
> ---
> .../bindings/serial/nvidia,tegra194-tcu.txt | 35 ++++++++++++++++++++++
> 1 file changed, 35 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/serial/nvidia,tegra194-tcu.txt
>
> diff --git a/Documentation/devicetree/bindings/serial/nvidia,tegra194-tcu.txt b/Documentation/devicetree/bindings/serial/nvidia,tegra194-tcu.txt
> new file mode 100644
> index 000000000000..86763bc5d74f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/serial/nvidia,tegra194-tcu.txt
> @@ -0,0 +1,35 @@
> +NVIDIA Tegra Combined UART (TCU)
> +
> +The TCU is a system for sharing a hardware UART instance among multiple
> +systems withing the Tegra SoC. It is implemented through a mailbox-
s/withing/within/
Otherwise,
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
> +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";
> +};
> --
> 2.16.1
>
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