i.MX ProcessorsのトピックRe: imx_2.6.35 kernel for imx28evk

imx_2.6.35 kernel for imx28evk

littlemonster — Tue, 01 Aug 2017 20:04:54 GMT

Hi,

I am trying to build a Yocto image with an imx kernel but that's not very successful.

What I am trying to do is to create a core-image-base image with Yocto / Bitbake with the version 2.6.35 of the imx kernel. To do that I am using the FSL community environnement http://freescale.github.io/#download and I am trying to use the version 2.6.35_maintain of this kernel : http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/refs/heads.

I do want to use this version because I am trying to use the audio recording with the imx28evk board and that I know it's working with that kernel version. And I need to add some custom recipes to my image so I have to use bitbake.

I tried to use the kernel of the demo image shipped with the board http://www.nxp.com/products/developer-resources/software-development-tools/i.mx-software-and-tools/i.mx28-evaluation-kit:MCIMX28EVKJ?tab=Design_Tools_Tab (i.MX28 Linux Binary Demo Files) with a rootfs created from my side but at boot time there is a kernel panic saying that the kernel is too old for the rootfs.

I also tried to build from my side the kernel but there are some compiling errors and I am almost sure that It won't work anymore with my "recent" rootfs.

I also tried to use the 2.6.35 version of the linux-fslc kernel but bitbake complains saying that this version is not available.

I didn't tried to use LTIB because It's a very old tool which seems to create a lot of issues to people who are trying to use it.

So, do you know a way to achieve my goal ?

Best regards,

Damien

Re: imx_2.6.35 kernel for imx28evk

igorpadykov — Tue, 01 Aug 2017 23:28:17 GMT

Hi Damien

issues with yocto may posted on meta-fsl-arm mailing list,

as yocto is not officially supported with i.MX28
https://lists.yoctoproject.org/listinfo/meta-freescale
Ltib is working fine on older ubuntu releases, one can look at

https://community.nxp.com/message/271714?commentID=271714#comment-271714

Best regards
igor
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Re: imx_2.6.35 kernel for imx28evk

Yuri — Wed, 02 Aug 2017 05:06:58 GMT

Hello,

the following app note may be helpful :

"Building for i.MX Mature Boards"

http://www.nxp.com/docs/en/application-note/AN12024.pdf

Regards,

Yuri.

Re: imx_2.6.35 kernel for imx28evk

littlemonster — Wed, 02 Aug 2017 09:26:08 GMT

Thank you for your answer Yuri.

I have already did the steps described in the document and I have a working image with personal recipes but with the linux-fslc-4.9.21 kernel. And my issue is that the audio recording to a wav file is not working. That's why I try to do the same but with a 2.6.35 kernel which is the one used in the example image shipped with the board and with that kernel I am able to record.

Regards,

Damien

Re: imx_2.6.35 kernel for imx28evk

littlemonster — Wed, 02 Aug 2017 10:17:46 GMT

Thank you Igor for your answer.

I will try to follow the link for LTIB.

Regards,

Damien