diff --git a/arch/arm/dts/at91sam9260.dtsi b/arch/arm/dts/at91sam9260.dtsi
index 0f25e33..69d9cea 100644
--- a/arch/arm/dts/at91sam9260.dtsi
+++ b/arch/arm/dts/at91sam9260.dtsi
@@ -34,6 +34,7 @@
 		tcb1 = &tcb1;
 		i2c0 = &i2c0;
 		ssc0 = &ssc0;
+		spi0 = &spi0;
 	};
 	cpus {
 		#address-cells = <0>;
diff --git a/arch/arm/dts/at91sam9260ek.dts b/arch/arm/dts/at91sam9260ek.dts
index 086c8ea..67a2660 100644
--- a/arch/arm/dts/at91sam9260ek.dts
+++ b/arch/arm/dts/at91sam9260ek.dts
@@ -118,7 +118,7 @@
 				cs-gpios = <0>, <&pioC 11 0>, <0>, <0>;
 				mtd_dataflash@0 {
 					compatible = "atmel,at45", "atmel,dataflash";
-					spi-max-frequency = <50000000>;
+					spi-max-frequency = <15000000>;
 					reg = <1>;
 				};
 			};
diff --git a/arch/arm/dts/at91sam9g20ek_common.dtsi b/arch/arm/dts/at91sam9g20ek_common.dtsi
index 65ae099..9db245e 100644
--- a/arch/arm/dts/at91sam9g20ek_common.dtsi
+++ b/arch/arm/dts/at91sam9g20ek_common.dtsi
@@ -99,7 +99,7 @@
 				cs-gpios = <0>, <&pioC 11 0>, <0>, <0>;
 				mtd_dataflash@0 {
 					compatible = "atmel,at45", "atmel,dataflash";
-					spi-max-frequency = <50000000>;
+					spi-max-frequency = <15000000>;
 					reg = <1>;
 				};
 			};