linux-kernel - Re: [PATCH v10 4/6] devicetree: Add new SKY81452 backlight binding

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Message-ID: <20150205045910.GA4234@jack-ThinkPad-T520>
Date:	Thu, 5 Feb 2015 13:59:10 +0900
From:	Gyungoh Yoo <gyungoh@...il.com>
To:	Rob Herring <robherring2@...il.com>
Cc:	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Jingoo Han <jg1.han@...sung.com>,
	Bryan Wu <cooloney@...il.com>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Jiri Kosina <trivial@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jonathan Cameron <jic23@...nel.org>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	ktsai@...ellamicro.com, hs@...x.de,
	"Opensource [Steve Twiss]" <stwiss.opensource@...semi.com>,
	matti.vaittinen@....com, Mark Brown <broonie@...nel.org>,
	Jason Cooper <jason@...edaemon.net>,
	Heiko Stübner <heiko@...ech.de>,
	Shawn Guo <shawn.guo@...escale.com>,
	Florian Vaussard <florian.vaussard@...l.ch>,
	Andrew Lunn <andrew@...n.ch>,
	Antony Pavlov <antonynpavlov@...il.com>,
	Hayato Suzuki <hytszk@...il.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	jack.yoo@...worksinc.com,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH v10 4/6] devicetree: Add new SKY81452 backlight binding

On Wed, Feb 04, 2015 at 09:11:22AM -0600, Rob Herring wrote:
> On Fri, Jan 23, 2015 at 12:28 AM,  <gyungoh@...il.com> wrote:
> > From: Gyungoh Yoo <jack.yoo@...worksinc.com>
> >
> > Signed-off-by: Gyungoh Yoo <jack.yoo@...worksinc.com>
> > Acked-by: Bryan Wu <cooloney@...il.com>
> > ---
> > Changes v10:
> > Nothing
> >
> > Changes v9:
> > Nothing
> >
> > Changes v8:
> > Renamed property names for backlight with vendor prefix
> > Modified gpio-enable property to generic property for GPIO
> > Made up the example for backlight DT
> >
> > Changes v7:
> > Nothing
> >
> > Changes v6:
> > Nothing
> >
> > Changes v5:
> > Nothing
> >
> > Changes v4:
> > Nothing
> >
> > Changes v3:
> > Nothing
> >
> > Changes v2:
> > Added reg attribute for I2C slave address
> 
> You did? Where is it?

It was just changes on version 2.
Since that version, the patch series was separted.

> 
> >  .../video/backlight/sky81452-backlight.txt         | 29 ++++++++++++++++++++++
> >  1 file changed, 29 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/video/backlight/sky81452-backlight.txt
> >
> > diff --git a/Documentation/devicetree/bindings/video/backlight/sky81452-backlight.txt b/Documentation/devicetree/bindings/video/backlight/sky81452-backlight.txt
> > new file mode 100644
> > index 0000000..8daebf5
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/video/backlight/sky81452-backlight.txt
> > @@ -0,0 +1,29 @@
> > +SKY81452-backlight bindings
> > +
> > +Required properties:
> > +- compatible           : Must be "skyworks,sky81452-backlight"
> > +
> > +Optional properties:
> > +- name                 : Name of backlight device. Default is 'lcd-backlight'.
> > +- gpios                        : GPIO to use to EN pin.
> > +                       See Documentation/devicetree/bindings/gpio/gpio.txt
> > +- skyworks,en-channels : Enable mask for current sink channel 1 to 6.
> 
> Does led-sources property being added in 3.20 work for this?

I think so. I will modify it.

> 
> > +- skyworks,ignore-pwm  : Ignore both PWM input
> > +- skyworks,dpwm-mode   : Enable DPWM dimming mode, otherwise Analog dimming.
> > +- skyworks,phase-shift : Enable phase shift mode
> > +- skyworks,ovp-level   : Over-voltage protection level.
> > +                       Should be between 14 or 28V.
> 
> Please append units (-volt)

I will append it and resubmit the patch.

Thanks.

> 
> > +- skyworks,short-detection-threshold   : It should be one of 4, 5, 6 and 7V.
> 
> Please append units (-volt)
> 
> > +- skyworks,current-limit       : It should be 2300mA or 2750mA.
> 
> Please append units (-mA)
> 
> > +
> > +Example:
> > +
> > +       backlight {
> > +               compatible = "skyworks,sky81452-backlight";
> > +               name = "pwm-backlight";
> > +               skyworks,en-channels = <0x3f>;
> > +               skyworks,ignore-pwm;
> > +               skyworks,phase-shift;
> > +               skyworks,ovp-level = <20>;
> > +               skyworks,current-limit = <2300>;
> > +       };
> > --
> > 1.9.1
> >
--
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