linux-kernel - Re: [RESEND PATCH v6 02/11] dt-bindings: power: supply: add DT bindings for max77650

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Date:   Tue, 26 Mar 2019 18:34:48 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Pavel Machek <pavel@....cz>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Lee Jones <lee.jones@...aro.org>,
        Sebastian Reichel <sre@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Input <linux-input@...r.kernel.org>,
        Linux LED Subsystem <linux-leds@...r.kernel.org>,
        Linux PM list <linux-pm@...r.kernel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [RESEND PATCH v6 02/11] dt-bindings: power: supply: add DT
 bindings for max77650

pt., 22 mar 2019 o 10:00 Pavel Machek <pavel@....cz> napisał(a):
>
> On Mon 2019-03-18 18:40:31, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> >
> > Add the DT binding document for the battery charger module of max77650.
> >
> > Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> > ---
> >  .../power/supply/max77650-charger.txt         | 27 +++++++++++++++++++
> >  1 file changed, 27 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/power/supply/max77650-charger.txt
> >
> > diff --git a/Documentation/devicetree/bindings/power/supply/max77650-charger.txt b/Documentation/devicetree/bindings/power/supply/max77650-charger.txt
> > new file mode 100644
> > index 000000000000..d25c95369616
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/power/supply/max77650-charger.txt
> > @@ -0,0 +1,27 @@
> > +Battery charger driver for MAX77650 PMIC from Maxim Integrated.
> > +
> > +This module is part of the MAX77650 MFD device. For more details
> > +see Documentation/devicetree/bindings/mfd/max77650.txt.
> > +
> > +The charger is represented as a sub-node of the PMIC node on the device tree.
> > +
> > +Required properties:
> > +--------------------
> > +- compatible:                Must be "maxim,max77650-charger"
> > +
> > +Optional properties:
> > +--------------------
> > +- min-microvolt:     Minimum CHGIN regulation voltage (in microvolts). Must be
> > +                     one of: 4000000, 4100000, 4200000, 4300000, 4400000,
> > +                     4500000, 4600000, 4700000.
>
> Probably needs "max," prefix. And .. what does this mean? Will charger
> shutdown if input is less than this?
>

The charger will enter the undervoltage lockout state and stop
charging, this is explained in the manual, so I don't think the
bindings are the right place to add this information.

Bart

> > +- curr-lim-microamp: CHGIN input current limit (in microamps). Must be one of:
> > +                     95000, 190000, 285000, 380000, 475000.
>
> "current-limit-microamp", I guess. And probably "max,current-limit-microamp".
>
> --
> (english) http://www.livejournal.com/~pavelmachek
> (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html