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I have successfully setup CM3+ with LAN9512. The only issue remaining is to RESET the lan with gpio

I have GPIO31 connected to LAN_RESET/RUN

Is it possible to set this GPIO for LAN_RUN in /boot/config.txt?

I have tried with this code but not successfully - gpio=31=op,pd

Thanks!

i think you would do that via dt-blobs.dtb? not entirely sure on the exact details though

having a hard time doing that.
Followed a link and the module refused to start after the new dtb file was loaded.
Had to flash Emmc again

which link did you follow?
if you hook up the uart, and set `uart_2ndstage=1` in config.txt, does it give any errors?

When I use a script to manually set GPIO 33 to high before shutdown or reboot it works perfectly. But it does not shutdown when using device tree

Why is the terminationn = "pull_up" not working? If I don't enter polarity = "active_low" the LAN chip doesn't even start

Here is my dt-blob.dts file -

/dts-v1/;


/ {
videocore {

pins_cm3 {

pin_config {

pin@default {
polarity = "active_low";
termination = "pull_down";
startup_state = "inactive";
function = "input";
}; // pin

pin@p31 { function = "output"; termination = "pull_up"; startup_state = "active"; polarity = "active_low";}; // LAN_RUN
pin@p128 { function = "input"; termination = "no_pulling"; polarity = "active_low"; }; // Hotplug
pin@p129 { function = "output"; termination = "no_pulling"; polarity = "active_low"; }; // EMMC_ENABLE_N
}; // pin_config

pin_defines {
pin_define@LAN_RUN {
type = "internal";
number = <31>;
};
}; // pin_defines

}; // pins_cm3

};

};

i'm pretty sure you need to include all of the sdcard and uart pins as well, or the firmware likely wont be able to access the SD/uart

I am using Emmc only

This device tree does boot up my module and I can ssh through ethernet port