> I'm guessing it was some feature intended to control e.g. a > regulator of some kind by routing them off-chip (since mixed-signal > chips rarely have MMC controllers inside...) and most designers > already have their own regulator designs so it made no sense > for anyone to actually implement it that way.
Yup, I think ARM PL180 HW IP developers envisioned that the SD-card regulator and/or level-shifter would utilize these signals electrically to configure what voltage to use. As far as I read the old TRM the way these bits encoded voltage levels were application-specific so I can't see that there would be any consensus of how to interpret them either. > If some vendor would actually start using these bits for the > intended purpose I guess we could adapt. (The pirate driver > msm_sdcc.c does not seem to use these bits either BTW.) I never did check whether msm_sdcc used those, but it seemed unimportant at the time since it's not the same driver (yet). Nice to know that neither driver uses those though. / Sebastian N�����r��y����b�X��ǧv�^�){.n�+����{��g"��^n�r���z���h�����&���G���h�(�階�ݢj"���m������z�ޖ���f���h���~�m�