Re: [PATCH v5 0/2] tty: serial: add DT bindings and serial driver for the SiFive FU540 UART

From: Paul Walmsley
Date: Fri May 03 2019 - 15:05:43 EST


On Thu, 2 May 2019, Kevin Hilman wrote:

> Paul Walmsley <paul.walmsley@xxxxxxxxxx> writes:
>
> > I'd recommend testing the DT patches with BBL and the open-source FSBL.
> > That's the traditional way of booting RISC-V Linux systems.
>
> OK, but as you know, not the tradiaional way of booting most other linux
> systems. ;)
>
> I'm working on getting RISC-V supported in kernelCI in a fully-automated
> way, and I don't currently have the time to add add support for BBL+FSBL
> to kernelCI automation tooling, so having u-boot support is the best way
> to get support in kernelCI, IMO.

That's great. Please keep hacking away on RISC-V support for kernelCI.
My point is just that the U-boot and OpenSBI software stack you're working
with is not going to be useful for automatic tests of some kernel patches
yet. That stack is still very new, and was written around a non-upstream
set of DT data. We are in the process of posting and merging patches to
fix that, but it's going to take a few releases of both the kernel and
those other boot stack components until things are sorted out in a more
durable way.


- Paul