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Date:   Mon, 21 Jan 2019 12:56:48 +0000
From:   Mark Brown <broonie@kernel.org>
To:     Benjamin GAIGNARD <benjamin.gaignard@st.com>
Cc:     "robh@kernel.org" <robh@kernel.org>,
        "arnd@arndb.de" <arnd@arndb.de>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Loic PALLARDY <loic.pallardy@st.com>,
        "benjamin.gaignard@linaro.org" <benjamin.gaignard@linaro.org>
Subject: Re: [RFC 2/7] domainsctrl: Introduce domains controller framework
Message-ID: <20190121125648.GC12679@sirena.org.uk>
References: <20190114144202.27315-1-benjamin.gaignard@st.com>
 <20190114144202.27315-3-benjamin.gaignard@st.com>
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On Fri, Jan 18, 2019 at 09:26:45AM +0000, Benjamin GAIGNARD wrote:
> On 1/17/19 6:27 PM, Mark Brown wrote:
> > On Mon, Jan 14, 2019 at 03:41:57PM +0100, Benjamin Gaignard wrote:

> > Do you have any clients in the works for this?  It seems fairly likely
> > that everything is fine in terms of setting the mode but it'd be good to
> > confirm that's the case.  The main thing I can think of that might be a

> Patch 3 use those functions to apply the default configuration before probing
> a driver (or after unbind it). I have in mind that drivers could ask to apply

Right, I saw that but I was more thinking of individual drivers.

> a configuration like it is done for pinctrl in resume/suspend functions.
> An example of that could be to start the hardware block on the main processor
> and, when going to sleep, change the configuration to grant the access to lower
> power processor.

Yes, that sounds like a good application.  I can also imagine something
like handing some hardware over to an acceleration engine (or a smaller
microcontroller core acting as one).

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