Problem with SPI in Jetson Nano

Please refer to the following steps to modify device tree to removing the GPIO usage for SPI pins.

Step1: Dissemble the dtb to dts
dtc -I dtb -O dts -o temp.dts tegra210-p3448-0000-p3449-0000-b00.dtb

Step2: Modify the following line
-        gpio-input = <0xd8 0xc 0xd 0xe 0xf 0xe8 0x26 0x95 0x5 0xbc 0xbd 0xbe 0xc1 0xc2 0xa8 0xc8 0xca 0x4d 0x4e 0x4c 0x4f 0x32 0x33 0x10 0x11 0x12 0x13 0x14 0x3a 0x3d 0x3e 0x41 0xe4>;
+        gpio-input = <0xd8 0x26 0x95 0x5 0xbc 0xbd 0xbe 0xc1 0xc2 0xa8 0xc8 0xca 0x4d 0x4e 0x4c 0x4f 0x32 0x33 0x3a 0x3d 0x3e 0x41 0xe4>;

Step3: Assemble the dts back to dtb
dtc -I dts -O dtb -o tegra210-p3448-0000-p3449-0000-b00.dtb temp.dts

After you finish above steps, please reflash the board.