How to add a Linux kernel configuration to a YOCTO Linux OS image?

[Gaston]

I have SAMA5D27-SOM1-EK1 board and I build for it Linux OS image using YOCTO project.

Now i want to add some configurations to the generated kernel Linux image. What i want to know is how to verify what Kernel configs are generated in my Linux image and how to add CONFIG_LEDS_USER to it if it does not exist ?.

How can I do this ? Thank you for your support