Dragonboard android defconfig location

Hey, I’m trying to enable I2C_MUX in the Android kernel config but not having any luck finding which file I need to modify. Thx.

To make it clearer, I’m trying to activate the following configs:
CONFIG_I2C_MUX is not set
CONFIG_I2C_MUX_GPIO is not set

but everytime I do it, the .config in out/target/product/msm8916_64/obj/KERNEL_OBJ gets overwritten with it turned off.

Ah, figured it out, it’s at kernel/arch/arm64/configs
Had a brain fart and realised that I didn’t correctly add ‘=y’ to turn on my configs.