linux-kernel - Re: [RFC PATCH v2 2/3] regmap: mmio: allow reset control in a MMIO regmap

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Message-ID: <be3f9f0f68ce371b1a3837d21146daa25ebe77a0.camel@codeconstruct.com.au>
Date:   Sun, 11 Dec 2022 10:23:26 +0800
From:   Jeremy Kerr <jk@...econstruct.com.au>
To:     Mark Brown <broonie@...nel.org>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lee Jones <lee@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        Philipp Zabel <p.zabel@...gutronix.de>
Subject: Re: [RFC PATCH v2 2/3] regmap: mmio: allow reset control in a MMIO
 regmap

Hi Mark,

> > A syscon device may need to be taken out of reset before functioning
> > - this change adds a facility to attach a reset control to a mmio
> > regmap, and performs the necessary deassert/assert operations on the
> > reset controller on attach/detach.
> 
> Managment of reset feels like something that should be done at a
> higher level - typically reset also implies losing all the register
> contents which means it should be somewhere above the cache layer.

Yep, that makes sense. I'll rework to do the reset controller handling
in the syscon layer instead - unless there are any objections to that?

Cheers,


Jeremy