This is the result of
$ sudo cat /sys/kernel/debug/tegra_gpio
I untar the BSP package on jetson nano and I run the ./flash on your reply.
Is this error saying that I should flash on host pc connecting with jetson nano with L4Tbr0?
Another question, where can I find dtsi file on jetson nano?
Jetson Nano SPI BUS Not Working - #10 by KevinFFF