FYI: head -r338341 on Pine64+ 2GB for a microsdhc boot media: mmc0: Failed to set VCCQ for card at relative address 43690

[Mark Millard]

aw_mmc0: <Allwinner Integrated MMC/SD controller> mem 0x1c0f000-0x1c0ffff irq 8 on simplebus0
mmc0: <MMC/SD bus> on aw_mmc0
. . .
mmcsd0: 32GB <SDHC SE32G 8.0 SN <REPLACED> MFG 07/2017 by 3 SD> at mmc0 50.0MHz/4bit/32768-block
mmc0: Failed to set VCCQ for card at relative address 43690

It seem to tolerate that it did-not/could-not set the value.



It appears that sysutils/mmc-utils (still) just
gets AW_MMC_INT_RESP_TIMEOUT / ioctl: Operation timed out
for: mmc extcsd read /dev/mmcsd0 (once it is not mounted).

# mmc extcsd read /dev/mmcsd0 | more
open: Operation not permitted

# df -m
Filesystem               1M-blocks  Used  Avail Capacity  Mounted on
/dev/ufs/PINE642GBrootfs     29400 16901  10147    62%    /
devfs                            0     0      0   100%    /dev
/dev/label/PINE642GBboot        63     0     63     0%    /boot/efi

Booting with / on a USB device instead and dismounting /boot/efi
(on mmcsd0) gets:

# mmc extcsd read /dev/mmcsd0 | more
AW_MMC_INT_RESP_TIMEOUT 
ioctl: Operation timed out
Could not read EXT_CSD from /dev/mmcsd0


===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)