[PATCH v2 1/4] dt-bindings: serial: add RX and TX FIFO properties

[Erwan Le Ray]

Add two optional DT properties to configure RX and TX FIFO thresholds:
- rx-threshold
- tx-threshold

Signed-off-by: Erwan Le Ray <erwan.leray at foss.st.com>

diff --git a/Documentation/devicetree/bindings/serial/serial.yaml b/Documentation/devicetree/bindings/serial/serial.yaml
index 65e75d040521..f368d58e8086 100644
--- a/Documentation/devicetree/bindings/serial/serial.yaml
+++ b/Documentation/devicetree/bindings/serial/serial.yaml
@@ -75,6 +75,16 @@ properties:
     type: boolean
     description: CTS and RTS pins are swapped.
 
+  rx-threshold:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      RX FIFO threshold configuration (in bytes).
+
+  tx-threshold:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      TX FIFO threshold configuration (in bytes).
+
 if:
   required:
     - uart-has-rtscts
-- 
2.17.1