// redo: ovmerge -c mcp251xfd-overlay.dts,spi0-0,interrupt=25 mcp251xfd-overlay.dts,spi0-1,interrupt=16

// Device tree overlay for https://www.waveshare.com/2-ch-can-fd-hat.htm
// in "Mode B" (requried hardware modification) configuration
// for details see https://www.waveshare.com/wiki/2-CH_CAN_FD_HAT


/dts-v1/;
/plugin/;

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/pinctrl/bcm2835.h>

/ {
	compatible = "brcm,bcm2835";
	fragment@0 {
		target = <&spidev0>;
		__overlay__ {
			status = "disabled";
		};
	};
	fragment@1 {
		target = <&gpio>;
		__overlay__ {
			mcp251xfd_pins: mcp251xfd_spi0_0_pins {
				brcm,pins = <25>;
				brcm,function = <BCM2835_FSEL_GPIO_IN>;
			};
		};
	};
	fragment@2 {
		target-path = "/clocks";
		__overlay__ {
			clk_mcp251xfd_osc: mcp251xfd-spi0-0-osc {
				#clock-cells = <0>;
				compatible = "fixed-clock";
				clock-frequency = <40000000>;
			};
		};
	};
	fragment@3 {
		target = <&spi0>;
		__overlay__ {
			status = "okay";
			#address-cells = <1>;
			#size-cells = <0>;
			mcp251xfd@0 {
				compatible = "microchip,mcp251xfd";
				reg = <0>;
				pinctrl-names = "default";
				pinctrl-0 = <&mcp251xfd_pins>;
				spi-max-frequency = <20000000>;
				interrupt-parent = <&gpio>;
				interrupts = <25 IRQ_TYPE_LEVEL_LOW>;
				clocks = <&clk_mcp251xfd_osc>;
			};
		};
	};
	fragment@4 {
		target = <&spidev1>;
		__overlay__ {
			status = "disabled";
		};
	};
	fragment@5 {
		target = <&gpio>;
		__overlay__ {
			mcp251xfd_pins_1: mcp251xfd_spi0_1_pins {
				brcm,pins = <16>;
				brcm,function = <BCM2835_FSEL_GPIO_IN>;
			};
		};
	};
	fragment@6 {
		target-path = "/clocks";
		__overlay__ {
			clk_mcp251xfd_osc_1: mcp251xfd-spi0-1-osc {
				#clock-cells = <0>;
				compatible = "fixed-clock";
				clock-frequency = <40000000>;
			};
		};
	};
	fragment@7 {
		target = <&spi0>;
		__overlay__ {
			status = "okay";
			#address-cells = <1>;
			#size-cells = <0>;
			mcp251xfd@1 {
				compatible = "microchip,mcp251xfd";
				reg = <1>;
				pinctrl-names = "default";
				pinctrl-0 = <&mcp251xfd_pins_1>;
				spi-max-frequency = <20000000>;
				interrupt-parent = <&gpio>;
				interrupts = <16 IRQ_TYPE_LEVEL_LOW>;
				clocks = <&clk_mcp251xfd_osc_1>;
			};
		};
	};
};