dirbaio[m]: > <@dirbaio:matrix.org> - Should we have a nanosecond-precision delay trait? yes/no
>   - if yes, i'd make it be a single same trait. Perhaps rename DelayUs to SimpleDelay or BasicDelay, add `delay_ns`.
> - Should SPI transaction DelayUs be DelayNs? yes/no
>   - imo no, it shouldn't be used for CS delays. Even if we do have a trait with `delay_ns`.

I would be in favour of renaming from `DelayUs`, might be a silly question but whats wrong with just calling the trait `Delay`?