diff --git a/target/linux/ath79/dts/ar9330_glinet_gl-ar150.dts b/target/linux/ath79/dts/ar9330_glinet_gl-ar150.dts
index 70754c905e..68e1995c76 100644
--- a/target/linux/ath79/dts/ar9330_glinet_gl-ar150.dts
+++ b/target/linux/ath79/dts/ar9330_glinet_gl-ar150.dts
@@ -86,7 +86,7 @@
 
 	flash@0 {
 		compatible = "jedec,spi-nor";
-		spi-max-frequency = <104000000>;
+		spi-max-frequency = <50000000>;
 		reg = <0>;
 
 		partitions {
diff --git a/target/linux/ath79/dts/ar9330_pqi_air-pen.dts b/target/linux/ath79/dts/ar9330_pqi_air-pen.dts
index 92484f9331..8537faa0f9 100644
--- a/target/linux/ath79/dts/ar9330_pqi_air-pen.dts
+++ b/target/linux/ath79/dts/ar9330_pqi_air-pen.dts
@@ -75,7 +75,7 @@
 
 	flash@0 {
 		compatible = "jedec,spi-nor";
-		spi-max-frequency = <104000000>;
+		spi-max-frequency = <50000000>;
 		reg = <0>;
 
 		partitions {
diff --git a/target/linux/ath79/dts/ar9331_8dev_carambola2.dts b/target/linux/ath79/dts/ar9331_8dev_carambola2.dts
index cc0320d652..ef244f0b55 100644
--- a/target/linux/ath79/dts/ar9331_8dev_carambola2.dts
+++ b/target/linux/ath79/dts/ar9331_8dev_carambola2.dts
@@ -73,7 +73,7 @@
 
 	flash@0 {
 		compatible = "jedec,spi-nor";
-		spi-max-frequency = <104000000>;
+		spi-max-frequency = <50000000>;
 		reg = <0>;
 
 		partitions {
diff --git a/target/linux/ath79/dts/ar9331_embeddedwireless_dorin.dts b/target/linux/ath79/dts/ar9331_embeddedwireless_dorin.dts
index 3489a972d4..4761b91093 100644
--- a/target/linux/ath79/dts/ar9331_embeddedwireless_dorin.dts
+++ b/target/linux/ath79/dts/ar9331_embeddedwireless_dorin.dts
@@ -68,7 +68,7 @@
 
 	flash@0 {
 		compatible = "jedec,spi-nor";
-		spi-max-frequency = <104000000>;
+		spi-max-frequency = <50000000>;
 		reg = <0>;
 
 		partitions {
diff --git a/target/linux/ath79/dts/ar9331_tplink_tl-mr3020-v1.dts b/target/linux/ath79/dts/ar9331_tplink_tl-mr3020-v1.dts
index 3cd5c130c8..97a058edf6 100644
--- a/target/linux/ath79/dts/ar9331_tplink_tl-mr3020-v1.dts
+++ b/target/linux/ath79/dts/ar9331_tplink_tl-mr3020-v1.dts
@@ -120,7 +120,7 @@
 	/* Spansion S25FL032PIF SPI flash */
 	flash@0 {
 		compatible = "jedec,spi-nor";
-		spi-max-frequency = <104000000>;
+		spi-max-frequency = <50000000>;
 		reg = <0>;
 
 		partitions {
diff --git a/target/linux/ath79/dts/ar9331_tplink_tl-mr3040-v2.dts b/target/linux/ath79/dts/ar9331_tplink_tl-mr3040-v2.dts
index e8a3dfbce7..5918e611dd 100644
--- a/target/linux/ath79/dts/ar9331_tplink_tl-mr3040-v2.dts
+++ b/target/linux/ath79/dts/ar9331_tplink_tl-mr3040-v2.dts
@@ -114,7 +114,7 @@
 
 	flash@0 {
 		compatible = "jedec,spi-nor";
-		spi-max-frequency = <104000000>;
+		spi-max-frequency = <50000000>;
 		reg = <0>;
 
 		partitions {