sam: atsamc21: enable CAN driver for SAMC21

Enable CAN driver sam0 in SAMC21 socs. CAN module exists only in
C21 socs.

Signed-off-by: Kamil Serwus <[email protected]>

Author: benys

dts/arm/atmel/samc21.dtsi

@@ -43,5 +43,47 @@
 			clock-names = "GCLK", "MCLK";
 			status = "disabled";
 		};
+
+		can {
+			compatible = "bosch,m_can-base";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			std-filter-elements = <28>;
+			ext-filter-elements = <8>;
+			rx-fifo0-elements = <3>;
+			rx-fifo1-elements = <3>;
+			rx-buffer-elements = <0>;
+			tx-buffer-elements = <1>;
+
+			can0: can@42001c00 {
+				compatible = "atmel,sam0-can";
+				reg = <0x42001c00 0x100>;
+				interrupts = <15 0>;
+				interrupt-names = "LINE_0";
+				clocks = <&gclk 26>, <&mclk 0x10 8>;
+				clock-names = "GCLK", "MCLK";
+				divider = <12>;
+				sjw = <1>;
+				sample-point = <875>;
+				sjw-data = <1>;
+				sample-point-data = <875>;
+				status = "disabled";
+			};
+
+			can1: can@42002000 {
+				compatible = "atmel,sam0-can";
+				reg = <0x42002000 0x100>;
+				interrupts = <16 0>;
+				interrupt-names = "LINE_0";
+				clocks = <&gclk 27>, <&mclk 0x10 9>;
+				clock-names = "GCLK", "MCLK";
+				divider = <12>;
+				sjw = <1>;
+				sample-point = <875>;
+				sjw-data = <1>;
+				sample-point-data = <875>;
+				status = "disabled";
+			};
+		};
 	};
 };