• Ying-Chun Liu (PaulLiu)'s avatar
    rpi3: sdhost: SDHost driver improvement · 2c8ef2ae
    Ying-Chun Liu (PaulLiu) authored
    This commit improves the SDHost driver for RPi3 as following:
     * Unblock MMC_CMD(17). Using MMC_CMD(17) is more efficient on
       block reading.
     * In some low probability that SEND_OP_COND might results CRC7
       error. We can consider that the command runs correctly. We don't
       need to retry this command so removing the code for retry.
     * Using MMC_BUS_WIDTH_1 as MMC default value to improve the stability.
     * Increase the clock to 50Mhz in data mode to speed up the io.
     * Change the pull resistors configuration to gain more stability.
    Signed-off-by: 's avatarYing-Chun Liu (PaulLiu) <paulliu@debian.org>
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