IMX_UFCR_RXTL_SHIFT
(16 << IMX_UFCR_RXTL_SHIFT);
ufcr |= (1 << IMX_UFCR_RXTL_SHIFT);
#define IMX_UFCR_RXTL __BITS(5,IMX_UFCR_RXTL_SHIFT) /* rw */