[PATCH 2/8] dt-bindings: serial: Add bindings for nvidia, tegra194-tcu
From: mperttunen@nvidia.com (Mikko Perttunen)
Date: 2018-05-08 11:43:57
Also in:
linux-devicetree, linux-serial, linux-tegra, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest, tty layer and serial drivers · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
Add bindings for the Tegra Combined UART device used to talk to the UART console on Tegra194 systems. Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> --- .../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- +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"; +};
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2.16.1