Commits
Dong Aisheng committed c23e84605cd
MLK-12086-1 dts: imx6qdl-sabreauto: use external vmmc for sd3 optionally SD3.0 cards require power cycle the card during suspend/resume, or the card re-enumeration after resume will fail to be identified as UHS card since the card is already working on 1.8v mode and refuse to ack the S18R request, thus, it will then work on normal high speed mode instead. We have to use external vmmc regulator to power cycle the card during suspend/resume to reset card signal voltage to 3.3v frist for the later 1.8v voltage switch. However, due to the sabreauto board limitation, we can not use external regulator to powere off card by default since the card power is shared with card detect pullup. Disabling the vmmc regulator will also shutdown the cd pullup which causes incorrect illusion of card exist. (e.g. plug out the card, mmc core wll think the card is exist since cd pin is low but it never can find the card) HW rework removing R695 and enable PAD internal pullup is needed to fix this isssue. User can manually open the mask of vmmc in dts to enable using external regulator if your board has done the rework as said above. Or by default we still do not power off card during suspend. Signed-off-by: Dong Aisheng <b29396@freescale.com> (cherry picked from commit 2fd1bf9320bce1c22f2406c74277b7422653511e) (cherry picked from commit 0804d85c137129db17766c3f4e236ae722d9b7db)