EFI password lock under MBP - EMC2554

Hi there,
My MBP is locked at boot (grey folder flashing) and when I try to start it with Option key pressed (to enter the boot menu); It shows the locker with the field to enter the password. It seems to be locked from the cloud, doesn't it?

The model #A1278, EMC2554, date of manufacture mid-2012 and i already watched the EFI Rom chip, it is an 25Q064A;
I bought an RP2 model B and i installed flashrom but I had an issue, in fact one of the headers required was not available. So, i asked the people on #flashrom and one of them said that I had to install it with a directive:. I made that according with the developper of this library: stefanct. I hope, it won't be a problem for the future process!
After that, I read Script for EFI Password Removal there were a few command lines to enter but I have a few questions about them:

1. SCANONLY=1 ./scan-n-patch.pl <file_name>

   I have to choose the mode of the scan'n pacth script, wonder with which argument I have to replace <file_name>, and how will it be used in the future?

2. sudo flashrom -p linux_spi:dev=/dev/spidev0.0 -r <file_name>

   About this command line, I wonder if the device is already created /dev/spidev0.0?

It makes me suspicious but I think it is normal as it's the first time I do that.

Thank you for your help!