Add RS485 enable & line polarity properties.
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
---
.../bindings/serial/snps-dw-apb-uart.yaml | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
index 12137fe80acf..8d440afabb1f 100644
--- a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
@@ -103,6 +103,23 @@ properties:
register. Define this if your serial port does not use this pin.
type: boolean
+ snps,rs485-interface-en:
+ description: Use true RS-485 DE and RE signals (in contrast to RS-485
+ emulation using RTS). Requires IP version 4 or above.
+ type: boolean
+
+ snps,de-active-high:
+ description: Defines the polarity of driver enable (DE_EN) signal.
+ Meaningful only with snps,rs485-interface-en. True indicates active
+ high.
+ type: boolean
+
+ snps,re-active-high:
+ description: Defines the polarity of receiver enable (RE_EN) signal.
+ Meaningful only with snps,rs485-interface-en. True indicates active
+ high.
+ type: boolean
+
required:
- compatible
- reg
--
2.30.2
