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  • linux-arm
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  • drivers
  • mmc
  • host
  • sdhci.c
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  • Chunyan Zhang's avatar
    mmc: sdhci: Add Auto CMD Auto Select support · 427b6514
    Chunyan Zhang authored Aug 30, 2018
    
    
    As SD Host Controller Specification v4.10 documents:
    Host Controller Version 4.10 defines this "Auto CMD Auto Select" mode.
    Selection of Auto CMD depends on setting of CMD23 Enable in the Host
    Control 2 register which indicates whether card supports CMD23. If CMD23
    Enable =1, Auto CMD23 is used and if CMD23 Enable =0, Auto CMD12 is
    used. In case of Version 4.10 or later, use of Auto CMD Auto Select is
    recommended rather than use of Auto CMD12 Enable or Auto CMD23
    Enable.
    
    This patch add this new mode support.
    
    Signed-off-by: default avatarChunyan Zhang <zhang.chunyan@linaro.org>
    Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
    Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
    427b6514