at91 is a mainline kernel ?

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ranran
Posts: 23
Joined: Wed Oct 03, 2018 11:39 am

at91 is a mainline kernel ?

Fri Oct 19, 2018 2:55 pm

Hello,

I tried to ask it several times, but got no answer.

What is at91 kernel ? Is it a mainline kernel ? Does it contains patches ?
Does a mainline kernel should also work with these devices ?


Thank you,
ranran
Last edited by ranran on Tue Oct 23, 2018 1:24 pm, edited 1 time in total.
nferre
Site Admin
Posts: 198
Joined: Wed Feb 14, 2007 11:17 am

Re: at91 is a mainline kernel ???

Fri Oct 19, 2018 6:59 pm

Hi,

Yes, our linux-X.Y-at91 branches are based on Mainline Linux kernel (corresponding to X.Y.Z variants).
We basically take a Mainline kernel, add the "stable" patches (corresponding to the "Z" variant above) and add our AT91 specific patches which are basically the features and board variants that we are submitting to Mainline. As this process can take time, we provide a "preview" of our current work as an AT91 branch on Linux4SAM.org.

We've been doing it for more than 10 years and are always integrating our changes to Linux Mainline. So, yes, you can also use Mainline Linux as well for most of our products.

Hope that it clarifies.

Best regards
ranran
Posts: 23
Joined: Wed Oct 03, 2018 11:39 am

Re: at91 is a mainline kernel ???

Tue Oct 23, 2018 8:03 am

Issue solved, Thank you!
gselabs
Posts: 4
Joined: Sun Feb 17, 2019 7:04 pm

Re: at91 is a mainline kernel ???

Thu Mar 14, 2019 8:30 am

nferre wrote:
Fri Oct 19, 2018 6:59 pm
So, yes, you can also use Mainline Linux as well for most of our products.
Is it right that for the moment 4.14 is latest kernel version which are fully tested with most of the features you provided?
So, in newer version of the kernel the features may not work properly?
Have you tested 4.18 or 4.19 against some features you provide? I concern particularly about sama5d2 SoC features.
Is there any place where Microchip development plans are posted?
Do you plan to make the patches to a next kernel version in the nearest future?
Which stable version you plan to support next and when this can happen?
Thanks.
nferre
Site Admin
Posts: 198
Joined: Wed Feb 14, 2007 11:17 am

Re: at91 is a mainline kernel ?

Thu Mar 14, 2019 12:23 pm

Hi,

Next kernel targeted for Linux4SAM is 4.19. Linux4SAM revision including it is scheduled for the next few months.

That being said, Mainline should work very well on sama5d2.

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