[yocto] Update kernel by package-management

[Mike Looijmans]

On 08-02-19 17:02, Mauro Ziliani wrote:
> Hi all.
> 
> I know this is a VERY dangerous operation, but I'm curious.

Depends on your definition of "dangerous".

> Is it possible to upgrade the kernel & dtb from debian package in Yocto?

Sure, doing it all the time (from ipk, but that shouldn't matter much).

If the kernel/dts is just a file on the system, there's just a package that 
installs /boot/uImage or whatever.

If the kernel is in some special location in flash or so, I usually set up the 
kernel image to install into /tmp/ and then let a post-install script write it 
from /tmp/ into the flash location (e.g. using "flashcp").

Same for the devicetree.

As for dangerous, worst thing that could happen is that you'd have to use the 
bootloader to revive the system.

> That is: there is a recipe  (which produce a deb package) to copy zImage
> and imx6dl-sabresd.dtb directly in the boot partition?
> 
> 
> I working on a imx6sabresd board.
> 
> The root partition is /dev/mmcblk2p1

--
ML