On Wed, 1 Feb 2023, at 23:58, Clay Chang wrote:

Hi Andrew,

On Tue, Jan 31, 2023 at 09:46:42PM +0800, Clay Chang wrote:

quoted

quoted

I'm trying to understand whether we can find some common ground with
controlling e.g. Aspeed's BMCs LPC peripherals based on Arnd's query[1],
but the description is a bit too vague right now for me to be able to do
that.

[1] https://lore.kernel.org/all/66ef9643-b47e-428d-892d-7c1cbd358a5d@app.fastmail.com/ (local)

Andrew

I briefly studied driver/soc/aspeed/aspeed-lpc-ctrl.c, and IMO the
similarity between HPE GXP driver and Aspeed's could be that we both
expose the LPC memory addresses or registers for configuration purposes.
However, the functions to be configured could vary. There are a few sets
of registers that HPE wants to expose for configuration in the future.

The talk of "exposing registers" feels concerning - we're trying not to 
do that directly. Instead we want to lift out an API that constrains 
the behaviour a bit but works for both of us if there's overlap in 
functionality.

Can you point to any documentation of the behaviour of your hardware? 
It's still a little vague to me.

Andrew

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