This patchset fixes HS400 mode on LS1028A SoC which is broken since commit 8ee802f899ef ("mmc: fsl_esdhc: make sure delay chain locked for HS400"). Well, before it might just have worked by accident.
=> run bootcmd_mmc0 fsl_esdhc: delay chain lock timeout Select HS400 failed -110 unable to select a mode : -5
Because the sl28 board already uses that mode, MMC boot is broken. The first patch disables HS400 mode on this board. Tom, patch 1 should go into the master branch for the 2021.04 release.
Patches 2 and 3 introduce the actual workarounds, patch 4 will then reenable the HS400 mode on the sl28 board. I don't expect that this will make it into the next release.
Michael Walle (4): board: sl28: disable HS400 mode mmc: fsl_esdhc: add workaround for erratum A-011334 mmc: fsl_esdhc: add pulse width detection workaround board: sl28: enable HS400 mode again
arch/arm/cpu/armv8/fsl-layerscape/Kconfig | 2 ++ drivers/mmc/Kconfig | 6 +++++ drivers/mmc/fsl_esdhc.c | 31 +++++++++++++++++++++-- include/fsl_esdhc.h | 3 +++ 4 files changed, 40 insertions(+), 2 deletions(-)