wifi: brcmfmac: pcie: Provide a buffer of random bytes to the device

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Newer Apple firmwares on chipsets without a hardware RNG require the
host to provide a buffer of 256 random bytes to the device on
initialization. This buffer is present immediately before NVRAM,
suffixed by a footer containing a magic number and the buffer length.

This won't affect chips/firmwares that do not use this feature, so do it
unconditionally for all Apple platforms (those with an Apple OTP).

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Hector Martin <marcan@marcan.st>
Reviewed-by: Julian Calaby <julian.calaby@gmail.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230214080034.3828-3-marcan@marcan.st

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Hector Martin 2023-02-14 17:00:34 +09:00 • committed by Kalle Valo

parent 0f485805d0

commit 91918ce88d

1 changed files with 32 additions and 0 deletions

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drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c

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