Add example for using st7571 with SPI.

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
---
 .../bindings/display/sitronix,st7571.yaml          | 25 ++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/sitronix,st7571.yaml b/Documentation/devicetree/bindings/display/sitronix,st7571.yaml
index b83721eb4b7f..1931a47c4217 100644
--- a/Documentation/devicetree/bindings/display/sitronix,st7571.yaml
+++ b/Documentation/devicetree/bindings/display/sitronix,st7571.yaml
@@ -76,3 +76,28 @@ examples:
         };
       };
     };
+
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      display@0 {
+        compatible = "sitronix,st7571";
+        reg = <0>;
+        reset-gpios = <&gpio0 3 GPIO_ACTIVE_LOW>;
+        width-mm = <37>;
+        height-mm = <27>;
+
+        panel-timing {
+          hactive = <128>;
+          vactive = <96>;
+          hback-porch = <0>;
+          vback-porch = <0>;
+          clock-frequency = <0>;
+          hfront-porch = <0>;
+          hsync-len = <0>;
+          vfront-porch = <0>;
+          vsync-len = <0>;
+        };
+      };
+    };

-- 
2.51.2