[Librem-5-dev] U-Boot support for uSD

Andy Green andy at warmcat.com
Wed Dec 26 23:09:57 PST 2018

Hi -

It seems my reasonably midrange for 2018 uSD (Sandisk Ultra U1 32GB) 
cannot be brought up by U-Boot on the dev board.

  u-boot=> mmc dev 1
  Card did not respond to voltage select!
  mmc_init: -95, time 29

But there's no evident problem using that card on a Linux box via a 
cheapo USB adapter.

"Just me"?  Known issue not on the list of known issues[1]?  Any 
recommended cards that do work?

(Please don't send me to some non-scalable "chat"... let's get the 
answer on the ml and in google... maybe even in the docs...)




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