how to configure the linux kernel

[lingyunhui]

I want to know how to use sdk to configure the linux kernel for my own target board.

[yipingwang]

Hello Ling Yunhui,

Please use the following procedure to modify Kernel source or reconfigure Kernel, and rebuild Kernel image in Linux SDK.

1. Clean Cache.

$bitbake virtual/kernel -c cleansstate

2. Get Kernel source.

$bitbake virtual/kernel -c patch

3. Get default Kernel configuration

$bitbake virtual/kernel -c configure

4. Go to Kernel source code folder

build_<platform>_release/tmp/work/<platform>-fsl-linux-gnuspe/linux-qoriq/3.12-r0/git/.

Modify the Kernel source, such as dts file in arch/powerpc/boot/dts/, or configure Kernel for your target with the command "make ARCH=powerpc menuconfig".

5. Go back to build folder and run

$ bitbake virtual/kernel -c compile

6. Go to step 4 to continue to modify Kernel source and rebuild Kernel image again with the command.

$ bitbake virtual/kernel -c compile -f

(-f option is used to force build action, because Kernel has been built previously).

7. $bitbake virtual/kernel

Get Kernel images in build_<platform>_release/tmp/deploy/images/<platform>/.

Have a great day,
Yiping

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[lingyunhui]

I want to know this is for rdb board or my customized board？Thank you.

[yipingwang]

The procedure is for users to modify demo board Kernel source for their customized boards.

Thanks,

Yiping

[lingyunhui]

I change the source code in /git. The original kernel is 3.12, and I change it to 3.10, but when I do menuconfig, the kernel version is still 3.12, I want to know how that happen. Thank you.

[yipingwang]

Hello Ling Yunhui,

If you use Kernel 3.10, probably SDK 1.8 is not a good choice for you, if you want to use it, please use the following way.

Go to Kernel source folder.

$ cp arch/powerpc/configs/mpc85xx_defconfig  .config

$ make ARCH=powerpc menuconfig

Have a great day,
Yiping

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