linux-kernel - Re: [PATCHv4] media: i2c/adp1653: devicetree support for adp1653

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Message-ID: <20150403082129.GA10671@amd>
Date:	Fri, 3 Apr 2015 10:21:29 +0200
From:	Pavel Machek <pavel@....cz>
To:	Javier Martinez Canillas <javier@...hile0.org>
Cc:	Andrew Morton <akpm@...l.org>, pali.rohar@...il.com,
	Sebastian Reichel <sre@...ian.org>,
	Sebastian Reichel <sre@...g0.de>,
	kernel list <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	Tony Lindgren <tony@...mide.com>,
	Kevin Hilman <khilman@...nel.org>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	ivo.g.dimitrov.75@...il.com, patrikbachan@...il.com,
	Kumar Gala <galak@...eaurora.org>,
	Benoit Cousson <bcousson@...libre.com>, sakari.ailus@....fi,
	m.chehab@...sung.com,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCHv4] media: i2c/adp1653: devicetree support for adp1653

Hi!

> > Fixed feedback by Sakari.
> >
> > Please apply,
> 
> There is no need to ask for patches to be applied IMHO. It is expected
> that people post patches wanting them to be applied unless there is an
> RFC prefix in the subject or say explicitly that the patch is for
> testing and should not be picked.

See history of this patch.

> > diff --git a/Documentation/devicetree/bindings/media/i2c/adp1653.txt b/Documentation/devicetree/bindings/media/i2c/adp1653.txt
> 
> When adding DT bindings, the Documentation portion should be in a
> separate patch and should come in the series before the patch
> implementing the binding. That makes the change easier to review,
> please take a look to points 1 and 3 in
> Documentation/devicetree/bindings/submitting-patches.txt.

Because actual patch at the end of email is too much eye clutter for
the poor device tree people, I can prepare nice series... producing
more work for me and more noise on the lists? No, thanks.

> > +Required Properties:
> > +
> > +  - compatible: Must contain be "adi,adp1653"
> > +
> > +  - reg: I2C slave address
> > +
> > +  - gpios: References to the GPIO that controls the power for the chip.
> 
> The convention nowadays is to not use unnamed DT properties for GPIOs
> but instead use a prefix that explains what those GPIOs are used for.
> So something like "power-gpios" or "power-gpio" (if there is only one
> GPIO) will be more suitable. Please take a look to
> Documentation/gpio/board.txt for more details.

Ok. Actually, reading docs below, "power-gpio" will not work, and it
needs to be "power-gpios", right?

> > +       if (!of_find_property(node, "gpios", NULL)) {
> > +               dev_err(&client->dev, "No gpio node\n");
> > +               return -EINVAL;
> > +       }
> > +
> > +       pd->power_gpio = of_get_gpio_flags(node, 0, &flags);
> 
> The old integer-based GPIO interface is deprecated and we want to get
> rid of it so please use the descriptor-based for new code. For example
> you want to use gpiod_get() instead of of_get_gpio_flags().
> Documentation/gpio/gpio.txt describes the new interface.

Ok.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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