EMMC50_PAD_DS_TUNE
sdr_set_field(host->top_base + EMMC50_PAD_DS_TUNE,
host->top_base + EMMC50_PAD_DS_TUNE);
sdr_set_bits(host->top_base + EMMC50_PAD_DS_TUNE,
sdr_clr_bits(host->top_base + EMMC50_PAD_DS_TUNE,
sdr_set_field(host->top_base + EMMC50_PAD_DS_TUNE,
sdr_set_field(host->top_base + EMMC50_PAD_DS_TUNE,
val = readl(host->top_base + EMMC50_PAD_DS_TUNE);
readl(host->top_base + EMMC50_PAD_DS_TUNE);
host->top_base + EMMC50_PAD_DS_TUNE);