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

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Message-ID: <20250501003113.1609342-2-jm@ti.com>
Date: Wed, 30 Apr 2025 19:31:12 -0500
From: Judith Mendez <jm@...com>
To: Judith Mendez <jm@...com>,
        Greg Kroah-Hartman
	<gregkh@...uxfoundation.org>,
        Kevin Hilman <khilman@...libre.com>
CC: Jiri Slaby <jirislaby@...nel.org>,
        Andy Shevchenko
	<andriy.shevchenko@...ux.intel.com>,
        <linux-kernel@...r.kernel.org>, <linux-serial@...r.kernel.org>,
        Hari Nagalla <hnagalla@...com>
Subject: [PATCH RFC 1/2] dt-bindings: serial: add binding documentation for TI PRUSS UART

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

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

Signed-off-by: Bin Liu <b-liu@...com>
Signed-off-by: Judith Mendez <jm@...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@...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@...00 {
+        compatible = "ti,pruss-uart";
+        reg = <0x28000 0x40>;
+        clocks = <&k3_clks 81 13>;
+        interrupt-parent = <&pruss_intc>;
+        interrupts = <6 4 4>;
+    };
-- 
2.49.0