diff --git a/dts/arm/atmel/samd20.dtsi b/dts/arm/atmel/samd20.dtsi
index a2adca6d1f9..cd0498c9549 100644
--- a/dts/arm/atmel/samd20.dtsi
+++ b/dts/arm/atmel/samd20.dtsi
@@ -39,26 +39,38 @@
 
 &sercom0 {
 	interrupts = <7 0>;
+	clocks = <&gclk 0xd>, <&pm 0x20 2>;
+	clock-names = "GCLK", "PM";
 };
 
 &sercom1 {
 	interrupts = <8 0>;
+	clocks = <&gclk 0xe>, <&pm 0x20 3>;
+	clock-names = "GCLK", "PM";
 };
 
 &sercom2 {
 	interrupts = <9 0>;
+	clocks = <&gclk 0xf>, <&pm 0x20 4>;
+	clock-names = "GCLK", "PM";
 };
 
 &sercom3 {
 	interrupts = <10 0>;
+	clocks = <&gclk 0x10>, <&pm 0x20 5>;
+	clock-names = "GCLK", "PM";
 };
 
 &sercom4 {
 	interrupts = <11 0>;
+	clocks = <&gclk 0x11>, <&pm 0x20 6>;
+	clock-names = "GCLK", "PM";
 };
 
 &sercom5 {
 	interrupts = <12 0>;
+	clocks = <&gclk 0x12>, <&pm 0x20 7>;
+	clock-names = "GCLK", "PM";
 };
 
 &tc4 {
diff --git a/dts/arm/atmel/samd21.dtsi b/dts/arm/atmel/samd21.dtsi
index 9d1382288a9..fa874397c46 100644
--- a/dts/arm/atmel/samd21.dtsi
+++ b/dts/arm/atmel/samd21.dtsi
@@ -39,26 +39,38 @@
 
 &sercom0 {
 	interrupts = <9 0>;
+	clocks = <&gclk 0x14>, <&pm 0x20 2>;
+	clock-names = "GCLK", "PM";
 };
 
 &sercom1 {
 	interrupts = <10 0>;
+	clocks = <&gclk 0x15>, <&pm 0x20 3>;
+	clock-names = "GCLK", "PM";
 };
 
 &sercom2 {
 	interrupts = <11 0>;
+	clocks = <&gclk 0x16>, <&pm 0x20 4>;
+	clock-names = "GCLK", "PM";
 };
 
 &sercom3 {
 	interrupts = <12 0>;
+	clocks = <&gclk 0x17>, <&pm 0x20 5>;
+	clock-names = "GCLK", "PM";
 };
 
 &sercom4 {
 	interrupts = <13 0>;
+	clocks = <&gclk 0x18>, <&pm 0x20 6>;
+	clock-names = "GCLK", "PM";
 };
 
 &sercom5 {
 	interrupts = <14 0>;
+	clocks = <&gclk 0x19>, <&pm 0x20 7>;
+	clock-names = "GCLK", "PM";
 };
 
 &tc4 {
diff --git a/dts/arm/atmel/samd2x.dtsi b/dts/arm/atmel/samd2x.dtsi
index 8b537304bc4..7ee613a22e6 100644
--- a/dts/arm/atmel/samd2x.dtsi
+++ b/dts/arm/atmel/samd2x.dtsi
@@ -73,6 +73,19 @@
 			};
 		};
 
+		pm: pm@40000400 {
+			compatible = "atmel,samd2x-pm";
+			reg = <0x40000400 0x400>;
+			interrupts = <0 0>;
+			#clock-cells = <2>;
+		};
+
+		gclk: gclk@40000c00 {
+			compatible = "atmel,samd2x-gclk";
+			reg = <0x40000c00 0x400>;
+			#clock-cells = <1>;
+		};
+
 		eic: eic@40001800 {
 			compatible = "atmel,sam0-eic";
 			reg = <0x40001800 0x1C>;
diff --git a/dts/arm/atmel/samd5x.dtsi b/dts/arm/atmel/samd5x.dtsi
index d264a399754..1e29ed2720e 100644
--- a/dts/arm/atmel/samd5x.dtsi
+++ b/dts/arm/atmel/samd5x.dtsi
@@ -72,6 +72,18 @@
 				<0x00806018 0x4>;
 		};
 
+		mclk: mclk@40000800 {
+			compatible = "atmel,samd5x-mclk";
+			reg = <0x40000800 0x400>;
+			#clock-cells = <2>;
+		};
+
+		gclk: gclk@40001c00 {
+			compatible = "atmel,samd5x-gclk";
+			reg = <0x40001c00 0x400>;
+			#clock-cells = <1>;
+		};
+
 		nvmctrl: nvmctrl@41004000  {
 			compatible = "atmel,sam0-nvmctrl";
 			label = "FLASH_CTRL";
@@ -143,6 +155,8 @@
 			interrupts = <46 0>, <47 0>, <48 0>, <49 0>;
 			status = "disabled";
 			label = "SERCOM0";
+			clocks = <&gclk 7>, <&mclk 0x14 12>;
+			clock-names = "GCLK", "MCLK";
 		};
 
 		sercom1: sercom@40003400 {
@@ -151,6 +165,8 @@
 			interrupts = <50 0>, <51 0>, <52 0>, <53 0>;
 			status = "disabled";
 			label = "SERCOM1";
+			clocks = <&gclk 8>, <&mclk 0x14 13>;
+			clock-names = "GCLK", "MCLK";
 		};
 
 		sercom2: sercom@41012000 {
@@ -159,6 +175,8 @@
 			interrupts = <54 0>, <55 0>, <56 0>, <57 0>;
 			status = "disabled";
 			label = "SERCOM2";
+			clocks = <&gclk 23>, <&mclk 0x18 9>;
+			clock-names = "GCLK", "MCLK";
 		};
 
 		sercom3: sercom@41014000 {
@@ -167,6 +185,8 @@
 			interrupts = <58 0>, <59 0>, <60 0>, <61 0>;
 			status = "disabled";
 			label = "SERCOM3";
+			clocks = <&gclk 24>, <&mclk 0x18 10>;
+			clock-names = "GCLK", "MCLK";
 		};
 
 		sercom4: sercom@43000000 {
@@ -175,6 +195,8 @@
 			interrupts = <62 0>, <63 0>, <64 0>, <65 0>;
 			status = "disabled";
 			label = "SERCOM4";
+			clocks = <&gclk 34>, <&mclk 0x20 0>;
+			clock-names = "GCLK", "MCLK";
 		};
 
 		sercom5: sercom@43000400 {
@@ -183,6 +205,8 @@
 			interrupts = <66 0>, <67 0>, <68 0>, <69 0>;
 			status = "disabled";
 			label = "SERCOM5";
+			clocks = <&gclk 35>, <&mclk 0x20 1>;
+			clock-names = "GCLK", "MCLK";
 		};
 
 		sercom6: sercom@43000800 {
@@ -191,6 +215,8 @@
 			interrupts = <70 0>, <71 0>, <72 0>, <73 0>;
 			status = "disabled";
 			label = "SERCOM6";
+			clocks = <&gclk 36>, <&mclk 0x20 2>;
+			clock-names = "GCLK", "MCLK";
 		};
 
 		sercom7: sercom@43000C00 {
@@ -199,6 +225,8 @@
 			interrupts = <74 0>, <75 0>, <76 0>, <77 0>;
 			status = "disabled";
 			label = "SERCOM7";
+			clocks = <&gclk 37>, <&mclk 0x20 3>;
+			clock-names = "GCLK", "MCLK";
 		};
 
 		porta: gpio@41008000 {
diff --git a/dts/arm/atmel/samr21.dtsi b/dts/arm/atmel/samr21.dtsi
index 247c69071c3..a17a87a2ba6 100644
--- a/dts/arm/atmel/samr21.dtsi
+++ b/dts/arm/atmel/samr21.dtsi
@@ -47,26 +47,38 @@
 
 &sercom0 {
 	interrupts = <9 0>;
+	clocks = <&gclk 0x14>, <&pm 0x20 2>;
+	clock-names = "GCLK", "PM";
 };
 
 &sercom1 {
 	interrupts = <10 0>;
+	clocks = <&gclk 0x15>, <&pm 0x20 3>;
+	clock-names = "GCLK", "PM";
 };
 
 &sercom2 {
 	interrupts = <11 0>;
+	clocks = <&gclk 0x16>, <&pm 0x20 4>;
+	clock-names = "GCLK", "PM";
 };
 
 &sercom3 {
 	interrupts = <12 0>;
+	clocks = <&gclk 0x17>, <&pm 0x20 5>;
+	clock-names = "GCLK", "PM";
 };
 
 &sercom4 {
 	interrupts = <13 0>;
+	clocks = <&gclk 0x18>, <&pm 0x20 6>;
+	clock-names = "GCLK", "PM";
 };
 
 &sercom5 {
 	interrupts = <14 0>;
+	clocks = <&gclk 0x19>, <&pm 0x20 7>;
+	clock-names = "GCLK", "PM";
 };
 
 &tc4 {
diff --git a/dts/bindings/arm/atmel,sam0-sercom.yaml b/dts/bindings/arm/atmel,sam0-sercom.yaml
index b183af079b5..448a4f7d7e0 100644
--- a/dts/bindings/arm/atmel,sam0-sercom.yaml
+++ b/dts/bindings/arm/atmel,sam0-sercom.yaml
@@ -10,3 +10,6 @@ properties:
 
     interrupts:
       required: true
+
+    clocks:
+      required: true
diff --git a/dts/bindings/arm/atmel,samd2x-pm.yaml b/dts/bindings/arm/atmel,samd2x-pm.yaml
new file mode 100644
index 00000000000..88af94202cf
--- /dev/null
+++ b/dts/bindings/arm/atmel,samd2x-pm.yaml
@@ -0,0 +1,19 @@
+# Copyright (c) 2020, Linaro Limited
+# SPDX-License-Identifier: Apache-2.0
+
+description: Atmel SAMD2x Power Manger (PM)
+
+compatible: "atmel,samd2x-pm"
+
+include: [clock-controller.yaml, base.yaml]
+
+properties:
+    reg:
+      required: true
+
+    "#clock-cells":
+      const: 2
+
+clock-cells:
+  - offset
+  - bit
diff --git a/dts/bindings/clock/atmel,samd2x-gclk.yaml b/dts/bindings/clock/atmel,samd2x-gclk.yaml
new file mode 100644
index 00000000000..29cce3b5984
--- /dev/null
+++ b/dts/bindings/clock/atmel,samd2x-gclk.yaml
@@ -0,0 +1,18 @@
+# Copyright (c) 2020, Linaro Limited
+# SPDX-License-Identifier: Apache-2.0
+
+description: Atmel SAMD2x Generic Clock Controller (GCLK)
+
+compatible: "atmel,samd2x-gclk"
+
+include: [clock-controller.yaml, base.yaml]
+
+properties:
+    reg:
+      required: true
+
+    "#clock-cells":
+      const: 1
+
+clock-cells:
+  - clkctrl_id
diff --git a/dts/bindings/clock/atmel,samd5x-gclk.yaml b/dts/bindings/clock/atmel,samd5x-gclk.yaml
new file mode 100644
index 00000000000..65a9cadc551
--- /dev/null
+++ b/dts/bindings/clock/atmel,samd5x-gclk.yaml
@@ -0,0 +1,18 @@
+# Copyright (c) 2020, Linaro Limited
+# SPDX-License-Identifier: Apache-2.0
+
+description: Atmel SAMD5x Generic Clock Controller (GCLK)
+
+compatible: "atmel,samd5x-gclk"
+
+include: [clock-controller.yaml, base.yaml]
+
+properties:
+    reg:
+      required: true
+
+    "#clock-cells":
+      const: 1
+
+clock-cells:
+  - periph_ch
diff --git a/dts/bindings/clock/atmel,samd5x-mclk.yaml b/dts/bindings/clock/atmel,samd5x-mclk.yaml
new file mode 100644
index 00000000000..53b1ce93c05
--- /dev/null
+++ b/dts/bindings/clock/atmel,samd5x-mclk.yaml
@@ -0,0 +1,19 @@
+# Copyright (c) 2020, Linaro Limited
+# SPDX-License-Identifier: Apache-2.0
+
+description: Atmel SAMD5x Generic Clock Controller (MCLK)
+
+compatible: "atmel,samd5x-mclk"
+
+include: [clock-controller.yaml, base.yaml]
+
+properties:
+    reg:
+      required: true
+
+    "#clock-cells":
+      const: 2
+
+clock-cells:
+  - offset
+  - bit
diff --git a/dts/bindings/i2c/atmel,sam0-i2c.yaml b/dts/bindings/i2c/atmel,sam0-i2c.yaml
index a815cc3beab..01b0d1b1e88 100644
--- a/dts/bindings/i2c/atmel,sam0-i2c.yaml
+++ b/dts/bindings/i2c/atmel,sam0-i2c.yaml
@@ -14,6 +14,12 @@ properties:
     interrupts:
       required: true
 
+    clocks:
+      required: true
+
+    clock-names:
+      required: true
+
     dma:
       type: int
       required: false
diff --git a/dts/bindings/serial/atmel,sam0-uart.yaml b/dts/bindings/serial/atmel,sam0-uart.yaml
index f50fa726189..9957a009a72 100644
--- a/dts/bindings/serial/atmel,sam0-uart.yaml
+++ b/dts/bindings/serial/atmel,sam0-uart.yaml
@@ -11,6 +11,12 @@ properties:
     interrupts:
       required: true
 
+    clocks:
+      required: true
+
+    clock-names:
+      required: true
+
     rxpo:
       type: int
       required: true
diff --git a/dts/bindings/spi/atmel,sam0-spi.yaml b/dts/bindings/spi/atmel,sam0-spi.yaml
index bc69a84429e..74356a6eef1 100644
--- a/dts/bindings/spi/atmel,sam0-spi.yaml
+++ b/dts/bindings/spi/atmel,sam0-spi.yaml
@@ -11,6 +11,12 @@ properties:
     reg:
       required: true
 
+    clocks:
+      required: true
+
+    clock-names:
+      required: true
+
     dipo:
       type: int
       required: true