diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README
index dcbd22a607462..23367b99a01c1 100644
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -1687,6 +1687,7 @@ Info:   Overlay for the NXP SC16IS750 UART with I2C Interface
 Load:   dtoverlay=sc16is750-i2c,<param>=<val>
 Params: int_pin                 GPIO used for IRQ (default 24)
         addr                    Address (default 0x48)
+        xtal                    On-board crystal frequency (default 14745600)
 
 
 Name:   sc16is752-i2c
diff --git a/arch/arm/boot/dts/overlays/sc16is750-i2c-overlay.dts b/arch/arm/boot/dts/overlays/sc16is750-i2c-overlay.dts
index 339d0d17c01ff..8c5d008a34252 100644
--- a/arch/arm/boot/dts/overlays/sc16is750-i2c-overlay.dts
+++ b/arch/arm/boot/dts/overlays/sc16is750-i2c-overlay.dts
@@ -31,7 +31,8 @@
 
 	__overrides__ {
 		int_pin = <&sc16is750>,"interrupts:0";
-		addr = <&sc16is750>,"reg:0";
+		addr = <&sc16is750>,"reg:0",<&sc16is750_clk>,"name";
+		xtal = <&sc16is750>,"clock-frequency:0";
 	};
 
 };
diff --git a/arch/arm/boot/dts/overlays/sc16is752-i2c-overlay.dts b/arch/arm/boot/dts/overlays/sc16is752-i2c-overlay.dts
index e43e81d5a28f9..355eaac656c8c 100644
--- a/arch/arm/boot/dts/overlays/sc16is752-i2c-overlay.dts
+++ b/arch/arm/boot/dts/overlays/sc16is752-i2c-overlay.dts
@@ -34,7 +34,7 @@
 
 	__overrides__ {
 		int_pin = <&sc16is752>,"interrupts:0";
-		addr = <&sc16is752>,"reg:0";
+		addr = <&sc16is752>,"reg:0",<&sc16is752_clk>,"name";
 		xtal = <&sc16is752>,"clock-frequency:0";
 	};
 };