The AXP809's SW (switch) regulator is unused on the Cubieboard 4.
Add an empty node for it so that the OS can generate constraints.

Signed-off-by: Chen-Yu Tsai <redacted>
---
Changes since v1: none
---
 arch/arm/boot/dts/sun9i-a80-cubieboard4.dts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts b/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts
index 04b014603659..910b29f0f0b5 100644
--- a/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts
+++ b/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts

@@ -253,6 +253,10 @@
 			reg_rtc_ldo: rtc_ldo {
 				regulator-name = "vcc-rtc-vdd1v8-io";
 			};
+
+			sw {
+				/* unused */
+			};
 		};
 	};
 

-- 
2.9.3