diff --git a/sys/dts/arm/overlays/spigen-rpi-b.dtso b/sys/dts/arm/overlays/spigen-rpi-b.dtso
index 14ee02dafe85..e237fcb680a4 100644
--- a/sys/dts/arm/overlays/spigen-rpi-b.dtso
+++ b/sys/dts/arm/overlays/spigen-rpi-b.dtso
@@ -13,11 +13,13 @@
 	spigen0: spigen0 {
 		compatible = "freebsd,spigen";
 		reg = <0>;
+		spi-max-frequency = <500000>; /* Req'd property, override with spi(8) */
 		status = "okay";
 	};
 	spigen1: spigen1 {
 		compatible = "freebsd,spigen";
 		reg = <1>;
+		spi-max-frequency = <500000>; /* Req'd property, override with spi(8) */
 		status = "okay";
 	};
 };
diff --git a/sys/dts/arm/overlays/spigen-rpi2.dtso b/sys/dts/arm/overlays/spigen-rpi2.dtso
index 204e1245b6f1..4b0e9fa0d856 100644
--- a/sys/dts/arm/overlays/spigen-rpi2.dtso
+++ b/sys/dts/arm/overlays/spigen-rpi2.dtso
@@ -17,11 +17,13 @@
 	spigen1: spigen1 {
 		compatible = "freebsd,spigen";
 		reg = <1>;
+		spi-max-frequency = <500000>; /* Req'd property, override with spi(8) */
 		status = "okay";
 	};
 	spigen2: spigen2 {
 		compatible = "freebsd,spigen";
 		reg = <2>;
+		spi-max-frequency = <500000>; /* Req'd property, override with spi(8) */
 		status = "okay";
 	};
 };