Add controller nodes for the four Bosch M_CAN blocks found on the
Nuvoton MA35D1 SoC.

Additionally, configure pinctrl and enable CAN1 and CAN3 on the
MA35D1 SOM board. Also, update the APLL frequency to 200MHz to ensure
the CAN controllers receive the required input clock for 50MHz operation.

Signed-off-by: Zi-Yu Chen <zychennvt@gmail.com>
---
v2: 
- Move assigned-clocks and assigned-clock-rates configurations of 
  CAN_DIV from SoC-level ma35d1.dtsi to board-level ma35d1-som-256m.dts
- Update APLL frequency to 200MHz to ensure the CAN controllers 
  receive the required 50MHz input clock.
  
 .../boot/dts/nuvoton/ma35d1-som-256m.dts      | 32 +++++++++++-
 arch/arm64/boot/dts/nuvoton/ma35d1.dtsi       | 52 +++++++++++++++++++
 2 files changed, 83 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts b/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts
index f6f20a17e501..fb23b0573bdc 100644
--- a/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts
+++ b/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts
@@ -37,6 +37,22 @@ clk_hxt: clock-hxt {
 	};
 };
 
+&can1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_can1>;
+	assigned-clocks = <&clk CAN1_DIV>;
+	assigned-clock-rates = <50000000>;
+	status = "okay";
+};
+
+&can3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_can3>;
+	assigned-clocks = <&clk CAN3_DIV>;
+	assigned-clock-rates = <50000000>;
+	status = "okay";
+};
+
 &clk {
 	assigned-clocks = <&clk CAPLL>,
 			  <&clk DDRPLL>,
@@ -45,7 +61,7 @@ &clk {
 			  <&clk VPLL>;
 	assigned-clock-rates = <800000000>,
 			       <266000000>,
-			       <180000000>,
+			       <200000000>,
 			       <500000000>,
 			       <102000000>;
 	nuvoton,pll-mode = "integer",
@@ -56,6 +72,20 @@ &clk {
 };
 
 &pinctrl {
+	can-grp {
+		pinctrl_can1: can1-pins {
+			nuvoton,pins = <11 14 4>,
+				       <11 15 4>;
+			bias-disable;
+		};
+
+		pinctrl_can3: can3-pins {
+			nuvoton,pins = <11 10 3>,
+				       <11 11 3>;
+			bias-disable;
+		};
+	};
+
 	uart-grp {
 		pinctrl_uart0: uart0-pins {
 			nuvoton,pins = <4 14 1>,
diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
index e51b98f5bdce..494724a25f3b 100644
--- a/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
+++ b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
@@ -244,6 +244,58 @@ gpion: gpio@340 {
 			};
 		};
 
+		can0: can@403c0000 {
+			compatible = "bosch,m_can";
+			reg = <0x0 0x403c0000 0x0 0x200>, <0x0 0x403c0200 0x0 0x2000>;
+			reg-names = "m_can", "message_ram";
+			interrupts = <GIC_SPI 71 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 131 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "int0", "int1";
+			clocks = <&clk HCLK3>, <&clk CAN0_GATE>;
+			clock-names = "hclk", "cclk";
+			bosch,mram-cfg = <0x0 4 4 32 32 32 8 8>;
+			status = "disabled";
+		};
+
+		can1: can@403d0000 {
+			compatible = "bosch,m_can";
+			reg = <0x0 0x403d0000 0x0 0x200>, <0x0 0x403d0200 0x0 0x2000>;
+			reg-names = "m_can", "message_ram";
+			interrupts = <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 132 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "int0", "int1";
+			clocks = <&clk HCLK3>, <&clk CAN1_GATE>;
+			clock-names = "hclk", "cclk";
+			bosch,mram-cfg = <0x0 4 4 32 32 32 8 8>;
+			status = "disabled";
+		};
+
+		can2: can@403e0000 {
+			compatible = "bosch,m_can";
+			reg = <0x0 0x403e0000 0x0 0x200>, <0x0 0x403e0200 0x0 0x2000>;
+			reg-names = "m_can", "message_ram";
+			interrupts = <GIC_SPI 125 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 133 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "int0", "int1";
+			clocks = <&clk HCLK3>, <&clk CAN2_GATE>;
+			clock-names = "hclk", "cclk";
+			bosch,mram-cfg = <0x0 4 4 32 32 32 8 8>;
+			status = "disabled";
+		};
+
+		can3: can@403f0000 {
+			compatible = "bosch,m_can";
+			reg = <0x0 0x403f0000 0x0 0x200>, <0x0 0x403f0200 0x0 0x2000>;
+			reg-names = "m_can", "message_ram";
+			interrupts = <GIC_SPI 126 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 134 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "int0", "int1";
+			clocks = <&clk HCLK3>, <&clk CAN3_GATE>;
+			clock-names = "hclk", "cclk";
+			bosch,mram-cfg = <0x0 4 4 32 32 32 8 8>;
+			status = "disabled";
+		};
+
 		uart0: serial@40700000 {
 			compatible = "nuvoton,ma35d1-uart";
 			reg = <0x0 0x40700000 0x0 0x100>;
-- 
2.34.1