• Girish K S's avatar
    mmc: sdhci-s3c: Fix mmc card I/O problem · 49bb1e61
    Girish K S authored
    This patch fixes the problem in sdhci-s3c host driver for Samsung Soc's.
    During the card identification stage the mmc core driver enumerates for
    the best bus width in combination with the highest available data rate.
    It starts enumerating from the highest bus width (8) to lowest width (1).
    
    In case of few MMC cards the 4-bit bus enumeration fails and tries
    the 1-bit bus enumeration. When switched to 1-bit bus mode the host driver
    has to clear the previous bus width setting and apply the new setting.
    
    The current patch will clear the previous bus mode and apply the new
    mode setting.
    Signed-off-by: default avatarGirish K S <girish.shivananjappa@linaro.org>
    Acked-by: default avatarJaehoon Chung <jh80.chung@samsung.com>
    Cc: <stable@kernel.org>
    Signed-off-by: default avatarChris Ball <cjb@laptop.org>
    49bb1e61
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