Adding features to the OpenTitanUart driver

[HU90m]

I fleshed out the OpenTitan UART driver a little while working on lowRISC/sonata-software#26. I don't think this is quite ready to be merged yet; opening this purely for visibility.

[davidchisnall]

There's a bunch of stuff in here that's just improving the existing code, rather than adding new things. It would be great to have those merged soon (I don't anticipate problems with the other bits either).

[HU90m]

There's a bunch of stuff in here that's just improving the existing code, rather than adding new things. It would be great to have those merged soon (I don't anticipate problems with the other bits either).

👍 Rebased onto #278 (comment) and marked as ready for review.

[davidchisnall]

We probably need to document somewhere that this changes the behaviour of stderr, for anyone who is using stdio.h.

[HU90m]

We probably need to document somewhere that this changes the behaviour of stderr, for anyone who is using stdio.h.

Where would be a good place to document this change?

[davidchisnall]

Good question. A blog post maybe, and possibly in the Sonata bit of the Getting Started doc?