ARM: dts: sun9i: cubieboard4: Declare AXP809 SW regulator as unused

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 <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

1 files changed, 4 insertions, 0 deletions

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 */
+                        };
                 };
         };