MMC_I_CLK_IS_OFF
CSR_CLR_4(sc, MMC_I_MASK, MMC_I_CLK_IS_OFF);
if (ISSET(status, MMC_I_CLK_IS_OFF)) {
pxamci_disable_intr(sc, MMC_I_CLK_IS_OFF);
CLR(status, MMC_I_CLK_IS_OFF);