ARM: dts: sun8i: r40: add node for CAN controller

Allwinner R40 (also known as A40i, T3, V40) has a CAN controller. The
controller is the same as in earlier A10 and A20 SoCs, but needs reset
line to be deasserted before use.

This patch adds a CAN node and the corresponding pinctrl descriptions.

Link: https://lore.kernel.org/all/20211122104616.537156-4-boger@wirenboard.com
Signed-off-by: Evgeny Boger <boger@wirenboard.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

arch/arm/boot/dts/sun8i-r40.dtsi

@@ -511,6 +511,16 @@
 			#interrupt-cells = <3>;
 			#gpio-cells = <3>;
 
+			can_ph_pins: can-ph-pins {
+				pins = "PH20", "PH21";
+				function = "can";
+			};
+
+			can_pa_pins: can-pa-pins {
+				pins = "PA16", "PA17";
+				function = "can";
+			};
+
 			clk_out_a_pin: clk-out-a-pin {
 				pins = "PI12";
 				function = "clk_out_a";
@@ -926,6 +936,15 @@
 			#size-cells = <0>;
 		};
 
+		can0: can@1c2bc00 {
+			compatible = "allwinner,sun8i-r40-can";
+			reg = <0x01c2bc00 0x400>;
+			interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_CAN>;
+			resets = <&ccu RST_BUS_CAN>;
+			status = "disabled";
+		};
+
 		i2c4: i2c@1c2c000 {
 			compatible = "allwinner,sun6i-a31-i2c";
 			reg = <0x01c2c000 0x400>;