linux-kernel - Re: [PATCH 0/5] fsi: Add regmap and refactor sbefifo

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Message-ID: <ac1ffdbe-809b-698f-b8aa-b4d0955b1d1d@linux.ibm.com>
Date:   Wed, 19 Oct 2022 13:59:23 -0500
From:   Eddie James <eajames@...ux.ibm.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     joel@....id.au, jk@...abs.org, alistair@...ple.id.au,
        linux-kernel@...r.kernel.org, linux-fsi@...ts.ozlabs.org
Subject: Re: [PATCH 0/5] fsi: Add regmap and refactor sbefifo


On 10/18/22 13:00, Mark Brown wrote:
> On Tue, Oct 18, 2022 at 09:02:33AM -0500, Eddie James wrote:
>> On 10/17/22 12:37, Mark Brown wrote:
>>> Is there any great reason to provide support in the regmap core for this
>>> rather than just implementing in drivers/fsi?  AFAICT this is just
>>> ending up as an implementation detail of shared code in drivers/fsi and
>>> won't have any external users?
>> One reason is to have a common interface with the new FSI regmap. That way
>> abstracting out the bus transfer is trivial in the new SBEFIFO driver,
>> assuming the SBEFIFO driver should switch to use the FSI regmap.
>> But you are correct, I doubt anyone else will use this. I suppose SBEFIFO
>> may as well not use the regmap and just use some callbacks for whichever bus
>> transfer...
> I'm not saying don't use regmap, I'm saying why not just do this in the
> driver - you can just as easily set the reg_read() and reg_write()
> callbacks in an individual driver without needing to create a new regmap
> bus type for just that one driver to use.


I understand. That sounds like a good approach then, I'll work on that 
for v2.

Thanks,

Eddie