| 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"; |
| }; |
