linux-kernel - Re: [PATCH v6 2/7] powercap/drivers/dtpm: Create a registering system

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Message-ID: <YGYe9p3oyNpMnsBT@kroah.com>
Date:   Thu, 1 Apr 2021 21:28:54 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        lukasz.luba@....com, rafael@...nel.org
Subject: Re: [PATCH v6 2/7] powercap/drivers/dtpm: Create a registering system

On Thu, Apr 01, 2021 at 08:36:49PM +0200, Daniel Lezcano wrote:
> A SoC can be differently structured depending on the platform and the
> kernel can not be aware of all the combinations, as well as the
> specific tweaks for a particular board.
> 
> The creation of the hierarchy must be delegated to userspace.

Why?  Isn't this what DT is for?

What "userspace tool" is going to be created to manage all of this?
Pointers to that codebase?

> These changes provide a registering mechanism where the different
> subsystems will initialize their dtpm backends and register with a
> name the dtpm node in a list.
> 
> The next changes will provide an userspace interface to create
> hierarchically the different nodes. Those will be created by name and
> found via the list filled by the different subsystem.
> 
> If a specified name is not found in the list, it is assumed to be a
> virtual node which will have children and the default is to allocate
> such node.

So userspace sets the name?

Why not use the name in the device itself?  I thought I asked that last
time...

thanks,

greg k-h