soc: sam0: Fix SAMD20 IRQ assignments

SAMD20 does not have the DMA or USB peripherals and as a result
the IRQs for all subsequent lines are shifted down from SAMD21.
This splits the interrupt assignment for the SERCOMs into the
SoC specific DTS file and moves the USB definition to SAMD21 only.

Signed-off-by: Derek Hageman <[email protected]>

Author: Sizurka

dts/arm/atmel/samd.dtsi

@@ -65,47 +65,41 @@
 		sercom0: sercom@42000800 {
 			compatible = "atmel,sam0-sercom";
 			reg = <0x42000800 0x40>;
-			interrupts = <9 0>;
 			status = "disabled";
 			label = "SERCOM0";
 		};
 
 		sercom1: sercom@42000c00 {
 			compatible = "atmel,sam0-sercom";
 			reg = <0x42000c00 0x40>;
-			interrupts = <10 0>;
 			status = "disabled";
 			label = "SERCOM1";
 		};
 
 		sercom2: sercom@42001000 {
 			compatible = "atmel,sam0-sercom";
 			reg = <0x42001000 0x40>;
-			interrupts = <11 0>;
 			status = "disabled";
 			label = "SERCOM2";
 		};
 
 		sercom3: sercom@42001400 {
 			compatible = "atmel,sam0-sercom";
 			reg = <0x42001400 0x40>;
-			interrupts = <12 0>;
 			status = "disabled";
 			label = "SERCOM3";
 		};
 
 		sercom4: sercom@42001800 {
 			compatible = "atmel,sam0-sercom";
 			reg = <0x42001800 0x40>;
-			interrupts = <13 0>;
 			status = "disabled";
 			label = "SERCOM4";
 		};
 
 		sercom5: sercom@42001c00 {
 			compatible = "atmel,sam0-sercom";
 			reg = <0x42001c00 0x40>;
-			interrupts = <14 0>;
 			status = "disabled";
 			label = "SERCOM5";
 		};
@@ -126,15 +120,6 @@
 			#gpio-cells = <2>;
 		};
 
-		usb0: usb@41005000 {
-			compatible = "atmel,sam0-usb";
-			status = "disabled";
-			reg = <0x41005000 0x1000>;
-			interrupts = <7 0>;
-			num-bidir-endpoints = <8>;
-			label = "USB0";
-		};
-
 		rtc: rtc@40001400 {
 			compatible = "atmel,sam0-rtc";
 			reg = <0x40001400 0x1C>;

dts/arm/atmel/samd20.dtsi

@@ -5,3 +5,27 @@
  */
 
 #include <atmel/samd.dtsi>
+
+&sercom0 {
+	interrupts = <7 0>;
+};
+
+&sercom1 {
+	interrupts = <8 0>;
+};
+
+&sercom2 {
+	interrupts = <9 0>;
+};
+
+&sercom3 {
+	interrupts = <10 0>;
+};
+
+&sercom4 {
+	interrupts = <11 0>;
+};
+
+&sercom5 {
+	interrupts = <12 0>;
+};

dts/arm/atmel/samd21.dtsi

@@ -5,3 +5,40 @@
  */
 
 #include <atmel/samd.dtsi>
+
+/ {
+	soc {
+		usb0: usb@41005000 {
+			compatible = "atmel,sam0-usb";
+			status = "disabled";
+			reg = <0x41005000 0x1000>;
+			interrupts = <7 0>;
+			num-bidir-endpoints = <8>;
+			label = "USB0";
+		};
+	};
+};
+
+&sercom0 {
+	interrupts = <9 0>;
+};
+
+&sercom1 {
+	interrupts = <10 0>;
+};
+
+&sercom2 {
+	interrupts = <11 0>;
+};
+
+&sercom3 {
+	interrupts = <12 0>;
+};
+
+&sercom4 {
+	interrupts = <13 0>;
+};
+
+&sercom5 {
+	interrupts = <14 0>;
+};