Index: head/sys/dts/arm/overlays/spigen-rpi-b.dtso
===================================================================
--- head/sys/dts/arm/overlays/spigen-rpi-b.dtso	(revision 335591)
+++ head/sys/dts/arm/overlays/spigen-rpi-b.dtso	(revision 335592)
@@ -1,29 +1,31 @@
 /* $FreeBSD$ */
 
 /dts-v1/;
 /plugin/;
 
 / {
 	compatible = "brcm,bcm2835";
 };
 
 &{/soc/spi@7e204000} {
 	status = "okay";
 
 	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";
 	};
 };
 
 &{/soc/gpio@7e200000/spi0_cs_pins} {
 	brcm,pins = <8 7>;
 	brcm,function = <4>; /* ALT0 */
 };
 
Index: head/sys/dts/arm/overlays/spigen-rpi2.dtso
===================================================================
--- head/sys/dts/arm/overlays/spigen-rpi2.dtso	(revision 335591)
+++ head/sys/dts/arm/overlays/spigen-rpi2.dtso	(revision 335592)
@@ -1,37 +1,39 @@
 /* $FreeBSD$ */
 
 /dts-v1/;
 /plugin/;
 
 / {
 	compatible = "brcm,bcm2836";
 };
 	
 &{/soc/spi@7e204000} {
 	status = "okay";
 	spigen0: spigen0 {
 		compatible = "freebsd,spigen";
 		reg = <0>;
 		status = "okay";
 	};
 	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";
 	};
 };
 
 &{/soc/gpio@7e200000/spi0_cs_pins} {
 	brcm,pins = <8 7 16>;
 	brcm,function = <4>; /* ALT0 */
 };
 
 &{/soc/gpio@7e200000/spi0_gpio7} {
 	brcm,pins = <7 8 16 9 10 11>;
 };