Re: [PATCH RFC v2 2/4] wifi: ath10k: support board-specific firmware overrides

[Kalle Valo <kvalo@kernel.org>]

Dmitry Baryshkov <dmitry.baryshkov@linaro.org> writes:

> Different Qualcomm platforms using WCN3990 WiFI chip use SoC-specific
> firmware versions with different features. For example firmware for
> SDM845 doesn't use single-chan-info-per-channel feature, while firmware
> for QRB2210 / QRB4210 requires that feature. Allow board DT files to
> override the subdir of the fw dir used to lookup the firmware-N.bin file
> decribing corresponding WiFi firmware.
>
> For example:
>
> - ath10k/WCN3990/hw1.0/wlanmdsp.mbn,
>   ath10k/WCN3990/hw1.0/firmware-5.bin: main firmware files, used by default
>
> - ath10k/WCN3990/hw1.0/qcm2290/wlanmdsp.mbn,
>   ath10k/WCN3990/hw1.0/qcm2290/firmware-5.bin: SoC specific firmware
>     with different signature and feature bits

Thanks, this looks good now.

> Note, while board files lookup uses the same function and thus it is
> possible to provide board-specific board-2.bin files, this is not
> required in 99% of cases as board-2.bin already contains a way to
> provide board-specific data with finer granularity than DT overrides.

After thinking more about this I agree, we want to have just one
board-2.bin file for WCN3990 as it makes easier to share board files
across all variants.

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