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WL1837MOD: Usage of REGDB file versus Wi-Fi regulatory configuration

Cédric Abgrall
Prodigy 10 points
Part Number: WL1837MOD

Tool/software:

Dear TI support,

I have one question regarding one of our product which is a Linux based product coupled with TI Wilink 8.

If I am not wrong, host is a RZN1D/snarc - ARM A5 32 bits and the Wi-Fi combo is WL1837MOD.

They would like to migrate from Kernel 5.10 / Yocto version Dunfell to Kernel 5.10 / Yocto version Scarthgap.

This is mostly motivated by the fact the support of Dunfell is stoped.

By the way, they noticed there is a change in the wireless regulation domain file (regdb):

https://git.kernel.org/pub/scm/linux/kernel/git/wens/wireless-regdb.git/

We noticed most of the changes are linked to the new band provided by Wi-Fi 6E (6GHz) which is not available on our WL1837MOD, but there are nevertheless few other changes.

We would like to ensure we can go with this new version without incompatibility risk or if you suggest another version. Is there any impact of regdf on driver?

Warm regards

Cédric

  • +1
    TI__Mastermind 31350 points

    Hello Cedric,

    There is no risk in moving to the new wireless regb. Although the wireless regdb does specify the new channels in 6E, it does not mean that every device connected to the linux MPU must also support those new channels. The wl8 linux driver specifies which channel it does support, and the upper mac80211 layer takes these into account.

    In fact, it is probably encouraged to move to the new wireless regdb as regulatory updates commonly occur. 

  • 0 in reply to Sabeeh Khan1
    Prodigy 10 points

    Thank you Sabeeh for your feedback.

    I close the ticket then.

    Warm regards

    Cédric