[OpenWrt-Devel] [PATCH v2] ar71xx: add support for RB SXTsq 2nD

[Thibaut]

Hi,

> Le 15 mars 2020 à 13:05, <mail at adrianschmutzler.de> <mail at adrianschmutzler.de> a écrit :
> 
> Hi,
> 
>> -----Original Message-----
>> From: openwrt-devel [mailto:openwrt-devel-bounces at lists.openwrt.org]
>> On Behalf Of Thibaut VARÈNE
>> Sent: Sonntag, 15. März 2020 11:35
>> To: openwrt-devel at lists.openwrt.org
>> Cc: Thibaut VARÈNE <hacks at slashdirt.org>
>> Subject: [OpenWrt-Devel] [PATCH v2] ar71xx: add support for RB SXTsq 2nD
> 
> the ar71xx target will only be supported in already released 19.07 branch and be removed afterwards.
> 
> Consequently, we do not accept any device support for this target anymore.
> 
> Please work with the ath79 target instead, which is meant to replace ar71xx and is also already included in 19.07.x (though Mikrotik devices have only been added in master).

I had a feeling this would be the answer.

At least the code is there for those who need it, and it details the necessary bits to get this hardware to work.

Regarding moving to ath79 there are a number of issues which I’m trying to wrap my head around.

Specifically, right now we have a (imo very convenient) « one image fits them all » approach for ar71xx-based mikrotik devices. This relies on load-time detection of the hardware which is based part on the kernel command string passed by the routerboot bootloader, and part on actual hardware detection at kernel load time (MIPS machine name).

I don’t know yet if it is possible to transcribe this in a DTS world: routerboot doesn’t support DTS, so my impression is that in order to maintain this feature an intermediary loader is needed, which is going to be non-trivial.

Second, I don’t know if the machine name detection can also be implemented in DTS: I was under the impression that all DTSes define a fixed string, there doesn’t seem to be a mechanism to lift that string from the mtd device as is currently done on ar71xx. Is this correct?

Thanks,
Thibaut
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