REG_MIS
u32 intfield = mpfs_spi_read(spi, REG_MIS) & 0xf;
pl011_write(pl011_read(uap, REG_MIS), uap, REG_ICR);
pl011_write(0xff, uap, REG_MIS);
[REG_MIS] = UART011_MIS,
[REG_MIS] = UART011_MIS,