Android Customizing the Linux kernel: Difference between revisions
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$ fastboot flash boot{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX6 | out/target/product/var_mx6/boot-<setup-name>.img |_a out/target/product/out/target/product/{{#var:ANDROID_MACHINE_NAME}}/boot.img }} | $ fastboot flash boot{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX6 | out/target/product/var_mx6/boot-<setup-name>.img |_a out/target/product/out/target/product/{{#var:ANDROID_MACHINE_NAME}}/boot.img }} | ||
{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX6 | | {{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX6 | | ||
Replace setup-name as per above table. | Replace setup-name as per above table. | ||
| | | | ||
$ sudo flash dtbo_a out/target/product/{{#var:ANDROID_MACHINE_NAME}}/dtbo-<name>.img | $ sudo flash dtbo_a out/target/product/{{#var:ANDROID_MACHINE_NAME}}/dtbo-<name>.img | ||
$ sudo flash vbmeta_a out/target/product/{{#var:ANDROID_MACHINE_NAME}}/vbmeta-<name>.img | $ sudo flash vbmeta_a out/target/product/{{#var:ANDROID_MACHINE_NAME}}/vbmeta-<name>.img | ||
Replace ''<name>'' with the actual desired setup name according to the table in the [[#Images_created_by_the_Android_build_for_Variscite_MX8M_system|"images created" section]]. | Replace ''<name>'' with the actual desired setup name according to the table in the [[#Images_created_by_the_Android_build_for_Variscite_MX8M_system|"images created" section]]. | ||
}} | |||
$ sudo fastboot reboot | $ sudo fastboot reboot | ||
Revision as of 01:33, 31 December 2019
VAR-SOM-MX6 - Android Nougat N7.1.1 Developer Guide
Manual build and customizing Android 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 functionality Exit the menu and answer "Yes" when asked "Do you wish to save your new 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 device tree
Edit
- VAR-SOM-MX6 : arch/arm/boot/dts/imx6qdl-var-som.dtsi
- DART-MX6: arch/arm/boot/dts/imx6qdl-var-dart.dtsi
For example we want to make device tree changes for SPI configuration
Refer to: SPI
Build 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 bootimage to target
Make sure device is in the fastboot mode if not , reboot in fastboot mode by using below commands.
$ adb reboot bootloader $ fastboot flash bootout/target/product/var_mx6/boot-<setup-name>.img Replace setup-name as per above table. $ sudo fastboot reboot