• Marek Vasut's avatar
    mmc: Downgrade SD/MMC from UHS/HS200/HS400 modes before boot · fceea992
    Marek Vasut authored
    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: default avatarMarek Vasut <marek.vasut+renesas@gmail.com>
    Cc: Tom Rini <trini@konsulko.com>
    fceea992