SDHCI_MAX_CURRENT_300_MASK
val |= FIELD_PREP(SDHCI_MAX_CURRENT_300_MASK, 0xFF);
FIELD_PREP(SDHCI_MAX_CURRENT_300_MASK, curr) |
mmc->max_current_300 = FIELD_GET(SDHCI_MAX_CURRENT_300_MASK,