diff mbox series

[v3,2/8] dt-bindings: serial: Add bindings for nvidia, tegra194-tcu

Message ID 20180702114033.15654-3-mperttunen@nvidia.com
State Not Applicable, archived
Headers show
Series Tegra Combined UART driver | expand

Commit Message

Mikko Perttunen July 2, 2018, 11:40 a.m. UTC 
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>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
---

Notes:
    v2:
    - Added Rob's Reviewed-by.
    
    v3:
    - Added Jon's Acked-by.

 .../bindings/serial/nvidia,tegra194-tcu.txt        | 35 ++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/serial/nvidia,tegra194-tcu.txt

Comments

Thierry Reding July 2, 2018, 12:51 p.m. UTC | #1 
On Mon, Jul 02, 2018 at 02:40:27PM +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@nvidia.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> Acked-by: Jon Hunter <jonathanh@nvidia.com>
> ---
> 
> Notes:
>     v2:
>     - Added Rob's Reviewed-by.
>     
>     v3:
>     - Added Jon's Acked-by.
> 
>  .../bindings/serial/nvidia,tegra194-tcu.txt        | 35 ++++++++++++++++++++++
>  1 file changed, 35 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/serial/nvidia,tegra194-tcu.txt

Acked-by: Thierry Reding <treding@nvidia.com>
diff mbox series

Patch

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..a8becf6efd2a
--- /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 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";
+};