Android Customizing the Linux kernel: Difference between revisions
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$ sudo `which fastboot` reboot | $ sudo `which fastboot` reboot | ||
{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX6 || | {{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX6 || | ||
Note: While flashing if you encouter like below <br> | *Note: While flashing if you encouter like below <br> | ||
$ sudo `which fastboot` flash boot_a out/target/product/{{#var:ANDROID_MACHINE_NAME}}/boot.img <br> | $ sudo `which fastboot` flash boot_a out/target/product/{{#var:ANDROID_MACHINE_NAME}}/boot.img <br> | ||
target reported max download size of 1073741824 bytes | target reported max download size of 1073741824 bytes | ||
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Finished. Total time: 1.772s | Finished. Total time: 1.772s | ||
Make sure you unlock your device following<br> | Make sure you unlock your device following<br> | ||
{{Varlink|Fastboot Unlock|{{#var:RELEASE_LINK}}|Fastboot Unlock}} | {{Varlink|Fastboot Unlock|{{#var:RELEASE_LINK}}|Fastboot Unlock}} and then follow the steps above | ||
}} | }} | ||
Revision as of 00:51, 1 January 2020
VAR-SOM-MX6 - Android Nougat 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/
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