[PATCH RFC 1/2] dt-bindings: serial: add binding documentation for TI PRUSS UART

Judith Mendez
2025-05-01T00:31:21Z

From: Bin Liu <b-liu@ti.com>

This adds the YAML DT binding for PRUSS UART on TI SoCs.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Judith Mendez <jm@ti.com>
---
.../bindings/serial/ti,pruss-uart.yaml | 54 +++++++++++++++++++
1 file changed, 54 insertions(+)
create mode 100644 Documentation/devicetree/bindings/serial/ti,pruss-uart.yaml

diff --git a/Documentation/devicetree/bindings/serial/ti,pruss-uart.yaml b/Documentation/devicetree/bindings/serial/ti,pruss-uart.yaml
new file mode 100644
index 000000000000..f7f660688f7e
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/ti,pruss-uart.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/ti,pruss-uart.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI PRUSS serial UART
+
+maintainers:
+ - Bin Liu <b-liu@ti.com>
+
+description: |
+ The PRU-ICSS module has a serial UART peripheral, which is based on
+ industry standard TL16C550, with 16-bytes TX/RX FIFOs.
+
+allOf:
+ - $ref: /schemas/serial.yaml#
+
+properties:
+ compatible:
+ items:
+ - const: ti,pruss-uart
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+ description: |
+ PRU UART interrupt mappings, containing an entry of 3 cell-values.
+ The first is the PRU System Event ID for PRU UART Interrupt Request.
+ The second is the PRU interrupt channel ID.
+ The third is the PRU host interrupt ID.
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - interrupts
+
+additionalProperties: true
+
+examples:
+ - |
+ pruss_uart: serial@28000 {
+ compatible = "ti,pruss-uart";
+ reg = <0x28000 0x40>;
+ clocks = <&k3_clks 81 13>;
+ interrupt-parent = <&pruss_intc>;
+ interrupts = <6 4 4>;
+ };
--
2.49.0