mirror of https://gitee.com/openkylin/linux.git
36 lines
1.1 KiB
Plaintext
36 lines
1.1 KiB
Plaintext
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";
|
|
};
|