How to add a device on a booted Linux kernel that is usually added via DTB?

Question

linux

There is an SPI-Flash device connected via the SPI bus.

It is not listed in DTB .

How not to overload, connect it?

In DT, the entry would be something like this:

&qspi {
status = "okay";
[email protected] {
#address-cells = <1>;
#size-cells = <1>;
compatible = "micron,mt25qu02g", "jedec,spi-nor";
reg=<0>;
spi-max-frequency = <100000000>;

m25p,fast-read;
cdns,page-size = <256>;
cdns,block-size = <16>;
}
}

Answer 1

you connect the right one, then
sudo sysctl -p
like this, I'm not sure, maybe someone who knows will tell