diff --git a/boards/arm/adafruit_itsybitsy_m4_express/adafruit_itsybitsy_m4_express.dts b/boards/arm/adafruit_itsybitsy_m4_express/adafruit_itsybitsy_m4_express.dts
index dcdf233aa4e..586aeed0b01 100644
--- a/boards/arm/adafruit_itsybitsy_m4_express/adafruit_itsybitsy_m4_express.dts
+++ b/boards/arm/adafruit_itsybitsy_m4_express/adafruit_itsybitsy_m4_express.dts
@@ -38,7 +38,7 @@
 	pwmleds {
 		compatible = "pwm-leds";
 		pwm_led0: pwm_led_0 {
-			pwms = <&tcc0 2>;
+			pwms = <&tcc0 2 PWM_MSEC(20)>;
 		};
 	};
 };
@@ -75,7 +75,7 @@
 	status = "okay";
 	compatible = "atmel,sam0-tcc-pwm";
 	prescaler = <8>;
-	#pwm-cells = <1>;
+	#pwm-cells = <2>;
 
 	pinctrl-0 = <&pwm0_default>;
 	pinctrl-names = "default";
diff --git a/boards/arm/adafruit_trinket_m0/adafruit_trinket_m0.dts b/boards/arm/adafruit_trinket_m0/adafruit_trinket_m0.dts
index bd0074c0f40..3a9f10f6ac6 100644
--- a/boards/arm/adafruit_trinket_m0/adafruit_trinket_m0.dts
+++ b/boards/arm/adafruit_trinket_m0/adafruit_trinket_m0.dts
@@ -38,7 +38,7 @@
 		compatible = "pwm-leds";
 
 		pwm_led0: pwm_led_0 {
-			pwms = <&tcc0 2>;
+			pwms = <&tcc0 2 PWM_MSEC(20)>;
 		};
 	};
 };
@@ -94,7 +94,7 @@
 	compatible = "atmel,sam0-tcc-pwm";
 	/* Gives a maximum period of 1.4 s */
 	prescaler = <4>;
-	#pwm-cells = <1>;
+	#pwm-cells = <2>;
 
 	pinctrl-0 = <&pwm_default>;
 	pinctrl-names = "default";
diff --git a/boards/arm/arduino_nano_33_iot/arduino_nano_33_iot.dts b/boards/arm/arduino_nano_33_iot/arduino_nano_33_iot.dts
index 87db84d2114..ad7b3dff850 100644
--- a/boards/arm/arduino_nano_33_iot/arduino_nano_33_iot.dts
+++ b/boards/arm/arduino_nano_33_iot/arduino_nano_33_iot.dts
@@ -33,7 +33,7 @@
 		compatible = "pwm-leds";
 
 		pwm_led0: pwm_led_0 {
-			pwms = <&tcc2 1>;
+			pwms = <&tcc2 1 PWM_MSEC(20)>;
 		};
 	};
 
@@ -139,7 +139,7 @@
 	status = "okay";
 	compatible = "atmel,sam0-tcc-pwm";
 	prescaler = <1024>;
-	#pwm-cells = <1>;
+	#pwm-cells = <2>;
 
 	pinctrl-0 = <&pwm_default>;
 	pinctrl-names = "default";
diff --git a/boards/arm/arduino_zero/arduino_zero.dts b/boards/arm/arduino_zero/arduino_zero.dts
index aecc25c68ff..4eff1db0e85 100644
--- a/boards/arm/arduino_zero/arduino_zero.dts
+++ b/boards/arm/arduino_zero/arduino_zero.dts
@@ -47,7 +47,7 @@
 		compatible = "pwm-leds";
 
 		pwm_led0: pwm_led_0 {
-			pwms = <&tcc2 1>;
+			pwms = <&tcc2 1 PWM_MSEC(20)>;
 		};
 	};
 };
@@ -95,7 +95,7 @@
 	compatible = "atmel,sam0-tcc-pwm";
 	/* Gives a maximum period of 1.4 s */
 	prescaler = <1024>;
-	#pwm-cells = <1>;
+	#pwm-cells = <2>;
 
 	pinctrl-0 = <&pwm_default>;
 	pinctrl-names = "default";
diff --git a/boards/arm/atsamd21_xpro/atsamd21_xpro.dts b/boards/arm/atsamd21_xpro/atsamd21_xpro.dts
index 2347425a1c9..3b341fc0ce4 100644
--- a/boards/arm/atsamd21_xpro/atsamd21_xpro.dts
+++ b/boards/arm/atsamd21_xpro/atsamd21_xpro.dts
@@ -38,7 +38,7 @@
 	pwmleds {
 		compatible = "pwm-leds";
 		pwm_led0: pwm_led_0 {
-			pwms = <&tcc0 0>;
+			pwms = <&tcc0 0 PWM_MSEC(20)>;
 		};
 	};
 
@@ -60,7 +60,7 @@
 	compatible = "atmel,sam0-tcc-pwm";
 	/* Gives a maximum period of 1.4s */
 	prescaler = <4>;
-	#pwm-cells = <1>;
+	#pwm-cells = <2>;
 
 	pinctrl-0 = <&pwm_default>;
 	pinctrl-names = "default";
diff --git a/boards/arm/atsame54_xpro/atsame54_xpro.dts b/boards/arm/atsame54_xpro/atsame54_xpro.dts
index 79c3a0d4a93..6b219920aab 100644
--- a/boards/arm/atsame54_xpro/atsame54_xpro.dts
+++ b/boards/arm/atsame54_xpro/atsame54_xpro.dts
@@ -38,7 +38,7 @@
 	pwmleds {
 		compatible = "pwm-leds";
 		pwm_led0: pwm_led_0 {
-			pwms = <&tcc0 2>;
+			pwms = <&tcc0 2 PWM_MSEC(20)>;
 		};
 	};
 
@@ -56,7 +56,7 @@
 	compatible = "atmel,sam0-tcc-pwm";
 	/* Gives a maximum period of 1.1s for 120MHz main clock */
 	prescaler = <8>;
-	#pwm-cells = <1>;
+	#pwm-cells = <2>;
 
 	pinctrl-0 = <&pwm_default>;
 	pinctrl-names = "default";
diff --git a/boards/arm/atsamr21_xpro/atsamr21_xpro.dts b/boards/arm/atsamr21_xpro/atsamr21_xpro.dts
index 7d12f9e8878..db9aedccfa4 100644
--- a/boards/arm/atsamr21_xpro/atsamr21_xpro.dts
+++ b/boards/arm/atsamr21_xpro/atsamr21_xpro.dts
@@ -38,7 +38,7 @@
 	pwmleds {
 		compatible = "pwm-leds";
 		pwm_led0: pwm_led_0 {
-			pwms = <&tcc0 3>;
+			pwms = <&tcc0 3 PWM_MSEC(20)>;
 		};
 	};
 
@@ -105,7 +105,7 @@
 	status = "okay";
 	compatible = "atmel,sam0-tcc-pwm";
 	prescaler = <4>;
-	#pwm-cells = <1>;
+	#pwm-cells = <2>;
 
 	pinctrl-0 = <&pwm_default>;
 	pinctrl-names = "default";
diff --git a/boards/arm/sam_v71_xult/sam_v71_xult-common.dtsi b/boards/arm/sam_v71_xult/sam_v71_xult-common.dtsi
index c84107ceb14..fa9a9e5100d 100644
--- a/boards/arm/sam_v71_xult/sam_v71_xult-common.dtsi
+++ b/boards/arm/sam_v71_xult/sam_v71_xult-common.dtsi
@@ -45,7 +45,7 @@
 	pwmleds {
 		compatible = "pwm-leds";
 		pwm_led0: pwm_led_0 {
-			pwms = <&pwm0 0 1000000>;
+			pwms = <&pwm0 0 PWM_MSEC(20)>;
 		};
 	};
 
diff --git a/boards/arm/serpente/serpente.dts b/boards/arm/serpente/serpente.dts
index c7047f89b0d..3237920aa5e 100644
--- a/boards/arm/serpente/serpente.dts
+++ b/boards/arm/serpente/serpente.dts
@@ -55,15 +55,15 @@
 	pwmleds {
 		compatible = "pwm-leds";
 		red_pwm_led: pwm_led_0 {
-			pwms = <&tcc0 0>;
+			pwms = <&tcc0 0 PWM_MSEC(20)>;
 			label = "Red PWM LED";
 		};
 		green_pwm_led: pwm_led_1 {
-			pwms = <&tcc0 3>;
+			pwms = <&tcc0 3 PWM_MSEC(20)>;
 			label = "Green PWM LED";
 		};
 		blue_pwm_led: pwm_led_2 {
-			pwms = <&tcc0 1>;
+			pwms = <&tcc0 1 PWM_MSEC(20)>;
 			label = "Blue PWM LED";
 		};
 	};
@@ -111,7 +111,7 @@ zephyr_udc0: &usb0 {
 	status = "okay";
 	compatible = "atmel,sam0-tcc-pwm";
 	prescaler = <4>;
-	#pwm-cells = <1>;
+	#pwm-cells = <2>;
 
 	pinctrl-0 = <&pwm_default>;
 	pinctrl-names = "default";