Android Customizing the Linux kernel: Difference between revisions

Revision as of 13:52, 23 November 2022

VAR-SOM-MX6 - N7.1.1 - Customizing the Linux kernel

Making changes to kernel configuration

$ cd ~/var_n_711_100/n_711_100_build/vendor/variscite/kernel_imx/
$ make ARCH=arm mrproper
$ make ARCH=arm imx_v7_var_android_defconfig
$ make ARCH=arm menuconfig

Navigate the menu and select the desired kernel functionalities, save the new configuration and exit.
Then, save the new configuration as the default configuration:

$ make ARCH=arm savedefconfig
$ cp arch/arm/configs/imx_v7_var_android_defconfig arch/arm/configs/imx_v7_var_android_defconfig.orig 
$ cp defconfig arch/arm/configs/imx_v7_var_android_defconfig

Making changes to the device tree

For example, edit the following file:

VAR-SOM-MX6 : ~/var_n_711_100/n_711_100_build/vendor/variscite/kernel_imx/arch/arm/boot/dts/imx6qdl-var-som.dtsi
DART-MX6: ~/var_n_711_100/n_711_100_build/vendor/variscite/kernel_imx/arch/arm/boot/dts/imx6qdl-var-dart.dtsi

For example, if you want to make changes related to the SPI configuration you can refer to: SPI

Build a new boot.img

When you perform changes to the kernel, you may build boot.img solely instead of building the whole Android.

$ cd ~/var_n_711_100/n_711_100_build
$ source build/envsetup.sh
$ lunch -userdebug
$ make bootimage

Flashing the boot image to the target

Run the following to boot the device into fastboot mode and reflash the boot image:

$ adb reboot bootloader
$ sudo `which fastboot` flash bootout/target/product/var_mx6/boot-<setup-name>.img
Replace setup-name as per above table.
$ sudo `which fastboot` reboot

@@ Line 2: / Line 2: @@
 --> {{#vardefine:RELEASE_PARAM|{{#urlget:release}}}} <!--
 --> {{#lst:Android_Platform_Customization|{{#var:RELEASE_PARAM|RELEASE_N7.1.1_1.0.0_VAR-SOM-MX6}}}} <!--
---> {{PageHeader|{{#var:HARDWARE_NAME}} - Android {{#var:ANDROID_NAME}} {{#var:ANDROID_VERSION}} - Customizing the Linux kernel}} {{DocImage|category1=Android|category2={{#var:HARDWARE_NAME}}}} __toc__
+--> {{PageHeader|{{#var:HARDWARE_NAME}} - {{#var:ANDROID_VERSION}} - Customizing the Linux kernel}} {{DocImage|category1=Android|category2={{#var:HARDWARE_NAME}}}} __toc__
 == Making changes to kernel configuration ==