Porting Clause 45 PHY support to Barebox

Porting Clause 45 PHY support to Barebox

[Heiner Kallweit]

I'd like to port Clause 45 PHY support and more recent Linux phylib
extensions to Barebox. Ideally it should be possible later to apply
most Linux patches as-is on Barebox. Before I start two questions:

- Any guidelines what it typically takes to port Linux Kernel code
  to Barebox? (I suppose at least removing mutexes + spinlocks, changing
  all interrupts to polling)
- Especially regarding drivers/net/phy: any plans I should be aware of?

Heiner

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Re: Porting Clause 45 PHY support to Barebox

[Sascha Hauer]

Hi Heiner,

On Thu, Apr 25, 2019 at 08:14:10PM +0200, Heiner Kallweit wrote:
> I'd like to port Clause 45 PHY support and more recent Linux phylib
> extensions to Barebox. Ideally it should be possible later to apply
> most Linux patches as-is on Barebox. Before I start two questions:
> 
> - Any guidelines what it typically takes to port Linux Kernel code
>   to Barebox? (I suppose at least removing mutexes + spinlocks, changing
>   all interrupts to polling)

Well yes, and that's about it. Sometimes you have to simplify the code,
sometimes you have to update some header files we have from Linux.

> - Especially regarding drivers/net/phy: any plans I should be aware of?

Much of the code is from Linux, but there's also much barebox original
code. I don't think the goal should be that it looks identically in the
end.

Sascha

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