linux-kernel - RE: [PATCH V3 1/2] dt-bindings: iio: light: isl29018: update power supply name

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Date:   Wed, 12 Dec 2018 06:16:58 +0000
From:   Anson Huang <anson.huang@....com>
To:     Rob Herring <robh@...nel.org>, Fabio Estevam <festevam@...il.com>
CC:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald <pmeerw@...erw.net>,
        Mark Rutland <mark.rutland@....com>,
        "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH V3 1/2] dt-bindings: iio: light: isl29018: update power
 supply name

Hi, Fabio
	Obviously, some of the dts files (such as arch/arm/boot/dts/exynos5420-peach-pit.dts) using "vcc" as isl29018's power supply name, they are NOT matched with datasheet, so should we update those dts files with "vdd" as well or just using the "vcc" in isl29018 driver? Which solution is better?

Best Regards!
Anson Huang

> -----Original Message-----
> From: Rob Herring [mailto:robh@...nel.org]
> Sent: 2018年12月11日 23:19
> To: Anson Huang <anson.huang@....com>
> Cc: Jonathan Cameron <jic23@...nel.org>; Hartmut Knaack
> <knaack.h@....de>; Lars-Peter Clausen <lars@...afoo.de>; Peter Meerwald
> <pmeerw@...erw.net>; Mark Rutland <mark.rutland@....com>;
> linux-iio@...r.kernel.org; devicetree@...r.kernel.org;
> linux-kernel@...r.kernel.org; dl-linux-imx <linux-imx@....com>
> Subject: Re: [PATCH V3 1/2] dt-bindings: iio: light: isl29018: update power
> supply name
> 
> On Mon, Dec 10, 2018 at 7:40 PM Anson Huang <anson.huang@....com>
> wrote:
> >
> > Hi, Rob
> >
> > Best Regards!
> > Anson Huang
> >
> > > -----Original Message-----
> > > From: Rob Herring [mailto:robh@...nel.org]
> > > Sent: 2018年12月11日 7:24
> > > To: Anson Huang <anson.huang@....com>
> > > Cc: jic23@...nel.org; knaack.h@....de; lars@...afoo.de;
> > > pmeerw@...erw.net; mark.rutland@....com; linux-iio@...r.kernel.org;
> > > devicetree@...r.kernel.org; linux-kernel@...r.kernel.org;
> > > dl-linux-imx <linux-imx@....com>
> > > Subject: Re: [PATCH V3 1/2] dt-bindings: iio: light: isl29018:
> > > update power supply name
> > >
> > > On Mon, Dec 10, 2018 at 07:11:19AM +0000, Anson Huang wrote:
> > > > According to datasheet, the isl29018 has "vddd/vdda" power supply,
> > > > and
> > > > isl29023/isl29035 ONLY has "vdd" power supply, update the power
> > > > supply name with "vdd" and "vdda" according to datasheet to cover
> > > > all devices and avoid confusion.
> > > >
> > > > Signed-off-by: Anson Huang <Anson.Huang@....com>
> > > > ---
> > > >  Documentation/devicetree/bindings/iio/light/isl29018.txt | 4 +++-
> > > >  1 file changed, 3 insertions(+), 1 deletion(-)
> > > >
> > > > diff --git
> > > > a/Documentation/devicetree/bindings/iio/light/isl29018.txt
> > > > b/Documentation/devicetree/bindings/iio/light/isl29018.txt
> > > > index b9bbde3..36f737d 100644
> > > > --- a/Documentation/devicetree/bindings/iio/light/isl29018.txt
> > > > +++ b/Documentation/devicetree/bindings/iio/light/isl29018.txt
> > > > @@ -15,7 +15,9 @@ Optional properties:
> > > >    Refer to interrupt-controller/interrupts.txt for generic interrupt client
> > > >    node bindings.
> > > >
> > > > -  - vcc-supply: phandle to the regulator that provides power to the
> sensor.
> > > > +  - vdd-supply: phandle to the regulator that provides vdd power
> > > > + to the
> > > sensor.
> > > > +
> > > > +  - vdda-supply: phandle to the regulator that provides vdda
> > > > + power to the
> > > sensor.
> > >
> > > Is this in use? You can't just change things if it is.
> >
> > I did NOT see any "vcc" in folder drivers/iio/light/, so I think it is
> > NOT used at all, so I take this chance to update it according to datasheet.
> Thanks.
> 
> arch/arm/boot/dts/exynos5420-peach-pit.dts-629- light-sensor@44 {
> arch/arm/boot/dts/exynos5420-peach-pit.dts:630:         compatible =
> "isil,isl29018";
> arch/arm/boot/dts/exynos5420-peach-pit.dts-631-         reg = <0x44>;
> arch/arm/boot/dts/exynos5420-peach-pit.dts-632-         vcc-supply =
> <&tps65090_fet5>;
> arch/arm/boot/dts/exynos5420-peach-pit.dts-633- };
> 
> arch/arm/boot/dts/exynos5800-peach-pi.dts-629-  light-sensor@44 {
> arch/arm/boot/dts/exynos5800-peach-pi.dts:630:          compatible =
> "isil,isl29018";
> arch/arm/boot/dts/exynos5800-peach-pi.dts-631-          reg = <0x44>;
> arch/arm/boot/dts/exynos5800-peach-pi.dts-632-          vcc-supply =
> <&tps65090_fet5>;
> arch/arm/boot/dts/exynos5800-peach-pi.dts-633-  };
> 
> The rest of the dts files using this don't have a supply it seems. So you need
> permission from the Exynos folks if you want to just drop this. And also update
> their dts files.
> 
> Rob