linux-kernel - Re: [PATCH 1/2] dt-bindings: mfd: Add ChromeOS fingerprint binding

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Message-ID: <YjB0JOKysPpg2KGF@google.com>
Date:   Tue, 15 Mar 2022 11:10:28 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Cc:     Stephen Boyd <swboyd@...omium.org>,
        Benson Leung <bleung@...omium.org>,
        linux-kernel@...r.kernel.org, chrome-platform@...ts.linux.dev,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        Guenter Roeck <groeck@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Craig Hesling <hesling@...omium.org>,
        Tom Hughes <tomhughes@...omium.org>,
        Alexandru M Stan <amstan@...omium.org>
Subject: Re: [PATCH 1/2] dt-bindings: mfd: Add ChromeOS fingerprint binding

On Tue, 15 Mar 2022, Krzysztof Kozlowski wrote:

> On 15/03/2022 00:22, Stephen Boyd wrote:
> > Add a binding to describe the fingerprint processor found on Chromeboks
> > with a fingerprint sensor.
> > 
> > Cc: Rob Herring <robh+dt@...nel.org>
> > Cc: <devicetree@...r.kernel.org>
> > Cc: Guenter Roeck <groeck@...omium.org>
> > Cc: Douglas Anderson <dianders@...omium.org>
> > Cc: Craig Hesling <hesling@...omium.org>
> > Cc: Tom Hughes <tomhughes@...omium.org>
> > Cc: Alexandru M Stan <amstan@...omium.org>
> > Signed-off-by: Stephen Boyd <swboyd@...omium.org>
> > ---
> >  .../bindings/mfd/google,cros-ec-fp.yaml       | 89 +++++++++++++++++++
> >  1 file changed, 89 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/mfd/google,cros-ec-fp.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/mfd/google,cros-ec-fp.yaml b/Documentation/devicetree/bindings/mfd/google,cros-ec-fp.yaml
> > new file mode 100644
> > index 000000000000..05d2b2b9b713
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/mfd/google,cros-ec-fp.yaml
> > @@ -0,0 +1,89 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/mfd/google,cros-ec-fp.yaml#
> 
> Why is this in the MFD directory? Is it really a Multi Function Device?
> Description is rather opposite. You also did not CC MFD maintainer.

A lot of the ChromeOS Embedded Controller support used to be located
in MFD.  There are still remnants, but most was moved to
drivers/platform IIRC.

Please see: drivers/mfd/cros_ec_dev.c

However, yes, I should have been on the recipients list.

-- 
Lee Jones [李琼斯]
Principal Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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