Android Customizing the Linux kernel: Difference between revisions
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$ make ARCH={{#ifeq: {{#var:HARDWARE_NAME}} |VAR-SOM-MX6|arm|arm64}} {{#var:KERNEL_DEFCONFIG}} | $ make ARCH={{#ifeq: {{#var:HARDWARE_NAME}} |VAR-SOM-MX6|arm|arm64}} {{#var:KERNEL_DEFCONFIG}} | ||
$ make ARCH={{#ifeq: {{#var:HARDWARE_NAME}} |VAR-SOM-MX6|arm|arm64}} menuconfig | $ make ARCH={{#ifeq: {{#var:HARDWARE_NAME}} |VAR-SOM-MX6|arm|arm64}} menuconfig | ||
Navigate the menu and select the desired kernel functionalities, save the new configuration and exit.<br> | Navigate through the menu, and select the desired kernel functionalities, save the new configuration, and exit.<br> | ||
Then, save the new configuration as the default configuration:<br> | Then, save the new configuration as the default configuration:<br> | ||
$ make ARCH={{#ifeq: {{#var:HARDWARE_NAME}} |VAR-SOM-MX6|arm|arm64}} savedefconfig | $ make ARCH={{#ifeq: {{#var:HARDWARE_NAME}} |VAR-SOM-MX6|arm|arm64}} savedefconfig | ||
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Run the following to boot the device into fastboot mode and reflash the boot image:<br> | Run the following to boot the device into fastboot mode and reflash the boot image:<br> | ||
$ adb reboot bootloader | $ adb reboot bootloader | ||
$ sudo `which fastboot` flash boot{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX6 | out/target/product/var_mx6/boot-<setup-name>.img |_a | $ sudo `which fastboot` flash boot{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX6 | out/target/product/var_mx6/boot-<setup-name>.img |_a out/target/product/{{#var:ANDROID_MACHINE_NAME}}/boot.img }} | ||
{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX6 | | {{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX6 | | ||
Latest revision as of 21:59, 12 September 2023
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 through 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