[Buildroot] [PATCH 2/4] board/lego/ev3: Create images using genimage

[David Lechner]

On 10/30/2016 11:19 PM, Baruch Siach wrote:
> Hi David,
>
> On Sun, Oct 30, 2016 at 06:32:24PM -0500, David Lechner wrote:
>> This adds a script to create SD card and flash images for LEGO MINDSTORMS
>> EV3 using the genimage tool.
>>
>> The default kernel config had to be modifed to add support for squashfs
>> and to add a ram disk.
>>
>> Signed-off-by: David Lechner <david at lechnology.com>
>> ---
>>  board/lego/ev3/genimage.cfg    |  57 ++++++++
>>  board/lego/ev3/linux_defconfig | 291 +++++++++++++++++++++++++++++++++++++++++
>>  board/lego/ev3/post-image.sh   |  14 ++
>>  board/lego/ev3/readme.txt      |  80 +++--------
>>  configs/lego_ev3_defconfig     |   8 +-
>>  5 files changed, 386 insertions(+), 64 deletions(-)
>>  create mode 100644 board/lego/ev3/genimage.cfg
>>  create mode 100644 board/lego/ev3/linux_defconfig
>>  create mode 100755 board/lego/ev3/post-image.sh
>
> [...]
>
>> diff --git a/board/lego/ev3/linux_defconfig b/board/lego/ev3/linux_defconfig
>> new file mode 100644
>> index 0000000..998e6da
>> --- /dev/null
>> +++ b/board/lego/ev3/linux_defconfig
>> @@ -0,0 +1,291 @@
> [...]
>> +CONFIG_EXT2_FS=m
>> +CONFIG_EXT3_FS=m
>
> ext3 was removed in kernel version 4.3, while lego_ev3_defconfig uses kernel
> version 4.4. Under which kernel have you generated this defconfig?

4.4. There is still a kernel option for ext3 that does nothing (for 
backwards compatibility according to the help text).

>
> You may try using a config fragment file to add support for additional kernel
> features. See pc_x86_64_bios_defconfig, for example.

That is much better. Thanks for the idea.

>
>> diff --git a/configs/lego_ev3_defconfig b/configs/lego_ev3_defconfig
>> index bf425f1..e96a689 100644
>> --- a/configs/lego_ev3_defconfig
>> +++ b/configs/lego_ev3_defconfig
>> @@ -8,7 +8,7 @@ BR2_GLOBAL_PATCH_DIR="board/lego/ev3/patches"
>>  # system
>>  BR2_TARGET_GENERIC_GETTY=y
>>  BR2_TARGET_GENERIC_GETTY_PORT="ttyS1"
>> -
>> +BR2_ROOTFS_POST_IMAGE_SCRIPT="board/lego/ev3/post-image.sh"
>>  # Linux headers same as kernel, a 4.4 series
>>  BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_4=y
>>
>> @@ -17,15 +17,19 @@ BR2_LINUX_KERNEL=y
>>  BR2_LINUX_KERNEL_CUSTOM_GIT=y
>>  BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/ev3dev/ev3dev-kernel.git"
>>  BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="v4.4.19-15-ev3dev-ev3_1"
>> -BR2_LINUX_KERNEL_DEFCONFIG="ev3dev"
>> +BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
>> +BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/lego/ev3/linux_defconfig"
>>  BR2_LINUX_KERNEL_UIMAGE=y
>>
>>  # filesystem
>>  BR2_TARGET_ROOTFS_EXT2=y
>>  BR2_TARGET_ROOTFS_EXT2_3=y
>> +BR2_TARGET_ROOTFS_SQUASHFS=y
>> +BR2_TARGET_ROOTFS_SQUASHFS4_XZ=y
>>  # BR2_TARGET_ROOTFS_TAR is not set
>>
>>  # U-Boot
>>  BR2_TARGET_UBOOT=y
>>  BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
>>  BR2_TARGET_UBOOT_BOARD_DEFCONFIG="legoev3"
>> +BR2_PACKAGE_HOST_GENIMAGE=y
>
> baruch
>