linux-kernel - Re: [PATCH v5 1/5] Documentation: tps65912: Add DT bindings for the TPS65912 PMIC

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Message-ID: <20151030190622.GN4058@x1>
Date:	Fri, 30 Oct 2015 19:06:23 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	"Andrew F. Davis" <afd@...com>
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>, devicetree@...r.kernel.org,
	linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 1/5] Documentation: tps65912: Add DT bindings for the
 TPS65912 PMIC

On Fri, 30 Oct 2015, Andrew F. Davis wrote:

> On 10/30/2015 12:10 PM, Lee Jones wrote:
> >On Thu, 29 Oct 2015, Andrew F. Davis wrote:
> >
> >>The TPS65912 PMIC contains several regulators and a GPIO controller.
> >>Add bindings for the TPS65912 PMIC.
> >>
> >>Signed-off-by: Andrew F. Davis <afd@...com>
> >>---
> >>  .../devicetree/bindings/gpio/gpio-tps65912.txt     | 16 +++++++
> >
> >Why have you dropped Linus' Review-by?
> >
> 
> Strange, I thought I made a change to this. Well this brings up a question,
> how much change can we have before we are supposed to drop Reviewed/Acked-by?

Common sense call I'm afraid. ;)

[...]

> >>+     the second cell is used to specify flags.
> >>+     See include/dt-bindings/gpio/gpio.h for possible values.
> >
> >This is a Linuxisum and shouldn't really live in here.
> >
> >I think it would be better to document them in ../gpio/gpio.txt and
> >reference that instead.
> >
> 
> Looks like that is already in ../gpio/gpio.txt:57

There is a mention of GPIO_ACTIVE_HIGH, as it's used in an example.
However GPIO_ACTIVE_LOW is missing.  I think both could do with
documenting properly, then you can refer to them from here.

[...]

> >>+Required properties:
> >>+ - compatible : Should be "ti,tps65912".
> >>+ - reg : Slave address or chip select number (I2C / SPI).
> >>+ - interrupt-parent : The parent interrupt controller.
> >>+ - interrupts : The interrupt line the device is connected to.
> >>+ - interrupt-controller : Marks the device node as an interrupt controller.
> >>+ - #interrupt-cells: The number of cells to describe an IRQ, this should be 2.
> >>+     The first cell is the IRQ number.
> >>+     The second cell is the flags, encoded as the trigger masks from
> >>+     ../interrupt-controller/interrupts.txt
> >
> >Nit: We *normally* treat these as bullet-points and not place
> >full-stops on them:
> >
> >$ git grep "compatible" -- Documentation/devicetree/bindings/ | grep -v "\.$" | wc -l
> >5227
> >$ git grep "compatible.*\.$" -- Documentation/devicetree/bindings/ | wc -l
> >486
> >
> 
> What about for multi-sentence descriptions, we need the middle full-stops, then to not
> have one on the end seems kinda odd looking.

That's the way I usually do it -- doesn't look too bad. ;)

[...]

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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