[OpenWrt-Devel] ath9k: mtd-cal-data vs firmware bin file

[Michal Cieslakiewicz]

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Hello Adrian,

Thanks for helping me with WNR patchset, one question came to my mind
in the process of developing it and after reading one of your emails.
Sorry if it has been answered elsewhere...

/etc/hotplug.d/firmware/10-ath9k-eeprom for these routers just extracts
4k of calibration data from ART to bin file in /lib/firmware. I
compared bin file to mtd area and they are identical. Why ath9k cannot
use this data directly accessing /dev/mtd6? Is that 'mtd-cal-data' dts
option for? If so, why does it not work in this case? (tested, ath9k
initialization ends with error)
I recall there was no such operation in ar71xx target and older
kernels...

Best regards
Michal
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