How to customize Device Tree?

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Hello.
I’m sorry to my English not well…:-(

I trying to access EEPROM via SPI on JETSON NANO.
It uses SPI0 pin numbers 89,91,93,95 on SODIMM.

The EEPROM Information is forrows,
Manufacture: Microchip
Model: 93LC56B

Please tell me how to change Device Tree.

Thank you.

3

Please check with the vendor to get the driver and dts configure.

4

Hello.
I had looked for the driver and dts configure, but It not found.
So I trying to edit the exsisting configure ‘tegra210-porg-p3448-common.dtsi’ and ‘tegra210-porg-eeprom-manager.dtsi’.

[common]
    spi@7000d400 {
        		#address-cells = <1>;
        		#size-cells = <0>;
        		status = "okay";
        	    reg = <0x0>;
        	    nvidia,enable-hw-based-cs;
        	    nvidia,rx-clk-tap-delay = <7>;
        	    
        	    spieeprom@0 {
        	    	#address-cells = <1>;
        	    	#size-cells = <1>;
        	    	compatible = "Microchip,93LC56B";
        	    	reg = <0>;
        	    	spi-max-frequency = <1000000>;
        	    	spi-cs-high;
        	    	spi-cpha;
        	    	spi-3wire;
        	    	size = <256>;
        	    };
        	};

[eeprom-manager]
/ {
	eeprom-manager {
		data-size = <0x100>;
		bus@0 {
			spi_bus = <&spi0>;
		};
	};
};

Thank you.