tree d70ef99f82839e325e93e9d582ad66ce38152871
parent f8e2933e8c9ad45d92d75d7612907b57945eccb1
author Marek Vasut <marek.vasut+renesas@gmail.com> 1548733551 +0100
committer Marek Vasut <marex@denx.de> 1550337137 +0100

mmc: Downgrade SD/MMC from UHS/HS200/HS400 modes before boot

Older kernel versions or systems which do not connect eMMC reset line
properly may not be able to handle situations where either the eMMC
is left in HS200/HS400 mode or SD card in UHS modes by the bootloader
and may misbehave. Downgrade the eMMC to HS/HS52 mode and/or SD card
to non-UHS mode before booting the kernel to allow such older kernels
to work with modern U-Boot.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Tom Rini <trini@konsulko.com>