How to change Linux Kernel Configuration in Yocto

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If there is need to enable or disable some configuration from the linux recipe which your BSP provides, create a new layer in Yocto.

In this layer create the following folders: sources/meta-<layer_name>/recipes-kernel/linux

In this folder create the following recipe (.bbappend) : touch linux-intel_%.bbappend

Add the following two lines in this file

FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
SRC_URI += "file://config.cfg"

Then create files folder in that location: 

$mkdir files && cd files

After this create config.cfg file.

$touch config.cfg

Add all your changes into this.

CONFIG_R8169=y
CONFIG_I2C_CHARDEV=y
CONFIG_EEPROM_AT24=y
# CONFIG_USB_SERIAL_CP210X is not set

That's all, now this settings will override the default configuration.

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