linux-kernel - Re: [RESEND PATCH 1/2] dt-bindings: firmware: arm,scmi: define support for name based regulators

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Message-ID: <Yfu8XulvWQbpQoBR@sirena.org.uk>
Date:   Thu, 3 Feb 2022 11:28:30 +0000
From:   Mark Brown <broonie@...nel.org>
To:     David Collins <quic_collinsd@...cinc.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Sudeep Holla <sudeep.holla@....com>,
        devicetree@...r.kernel.org, Liam Girdwood <lgirdwood@...il.com>,
        Cristian Marussi <cristian.marussi@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        Subbaraman Narayanamurthy <quic_subbaram@...cinc.com>
Subject: Re: [RESEND PATCH 1/2] dt-bindings: firmware: arm,scmi: define
 support for name based regulators

On Wed, Feb 02, 2022 at 04:09:43PM -0800, David Collins wrote:
> On 2/2/22 9:38 AM, Mark Brown wrote:

> > This seems like a scenario where the DT should be being generated at
> > runtime along with the virtualisation of the platform?  TBH a setup
> > where this is an issue feels like it's asking for trouble.

> I'm not familiar with runtime device tree generation.  Could you please
> point to an example of it or documentation for it?  How would this
> handle kernel devices on the VM side which need a phandle to an
> scmi-regulator DT subnode in order to get a pointer to the corresponding
> regulator device at runtime via devm_regulator_get()?

I believe qemu does this for the virt machine.  I'm not sure what you're
seeing as particularly complex about generating regulator links in
particular though?

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