[PATCH] dt-bindings: display: sitronix,st7789v: document dc-gpios

[Krzysztof Kozlowski]

The device comes with DCX pin which is already used in
canaan/sipeed_maixduino.dts (although not in Linux driver).

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
---
 .../devicetree/bindings/display/panel/sitronix,st7789v.yaml   | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml b/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml
index d984b59daa4a..fa6556363cca 100644
--- a/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml
+++ b/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml
@@ -26,6 +26,10 @@ properties:
   spi-cpha: true
   spi-cpol: true
 
+  dc-gpios:
+    maxItems: 1
+    description: DCX pin, Display data/command selection pin in parallel interface
+
 required:
   - compatible
   - reg
-- 
2.34.1