[PATCH v4] arm64: dts: nuvoton: ma35d1: add CAN nodes

[Zi-Yu Chen <zychennvt@gmail.com>]

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 160MHz to ensure
the CAN controllers receive the required input clock for 80MHz operation.

Signed-off-by: Zi-Yu Chen <zychennvt@gmail.com>
---
v4:
 - Add hardware reset properties for CANFD0 through CANFD3.
v3:
 - Change CAN clock to 80MHz and APLL to 160MHz to use a higher multiple
   of 40MHz, as suggested by Marc.
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       | 56 +++++++++++++++++++
 2 files changed, 87 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 a029b660e8dc..e2d3fde1dab3 100644
--- a/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts
+++ b/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts
@@ -39,6 +39,22 @@ clk_hxt: clock-hxt {
 	};
 };
 
+&can1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_can1>;
+	assigned-clocks = <&clk CAN1_DIV>;
+	assigned-clock-rates = <80000000>;
+	status = "okay";
+};
+
+&can3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_can3>;
+	assigned-clocks = <&clk CAN3_DIV>;
+	assigned-clock-rates = <80000000>;
+	status = "okay";
+};
+
 &clk {
 	assigned-clocks = <&clk CAPLL>,
 			  <&clk DDRPLL>,
@@ -47,7 +63,7 @@ &clk {
 			  <&clk VPLL>;
 	assigned-clock-rates = <800000000>,
 			       <266000000>,
-			       <180000000>,
+			       <160000000>,
 			       <500000000>,
 			       <102000000>;
 	nuvoton,pll-mode = "integer",
@@ -58,6 +74,20 @@ &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 7228ad4735b5..b3b8c8673a2a 100644
--- a/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
+++ b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
@@ -244,6 +244,62 @@ 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";
+			resets = <&sys MA35D1_RESET_CANFD0>;
+			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";
+			resets = <&sys MA35D1_RESET_CANFD1>;
+			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";
+			resets = <&sys MA35D1_RESET_CANFD2>;
+			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";
+			resets = <&sys MA35D1_RESET_CANFD3>;
+			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