linux-kernel - Re: [PATCH 1/5] Documentation: dt: Add kona-pwm binding

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Date:	Mon, 25 Nov 2013 12:17:10 +0100
From:	Thierry Reding <thierry.reding@...il.com>
To:	Tim Kryger <tim.kryger@...aro.org>
Cc:	Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Rob Landley <rob@...dley.net>,
	Christian Daudt <bcm@...thebug.org>,
	Grant Likely <grant.likely@...aro.org>,
	Linux PWM List <linux-pwm@...r.kernel.org>,
	Device Tree List <devicetree@...r.kernel.org>,
	Linux Doc List <linux-doc@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Broadcom Kernel Feedback List 
	<bcm-kernel-feedback-list@...adcom.com>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
	Linaro Patches List <patches@...aro.org>
Subject: Re: [PATCH 1/5] Documentation: dt: Add kona-pwm binding

On Mon, Nov 18, 2013 at 10:54:57AM -0800, Tim Kryger wrote:
> Add the binding description for the kona-pwm block found on Broadcom's
> mobile SoCs.
> 
> Signed-off-by: Tim Kryger <tim.kryger@...aro.org>
> Reviewed-by: Alex Elder <elder@...aro.org>
> Reviewed-by: Markus Mayer <markus.mayer@...aro.org>
> ---
>  .../devicetree/bindings/pwm/bcm-kona-pwm.txt       | 24 ++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pwm/bcm-kona-pwm.txt
> 
> diff --git a/Documentation/devicetree/bindings/pwm/bcm-kona-pwm.txt b/Documentation/devicetree/bindings/pwm/bcm-kona-pwm.txt
> new file mode 100644
> index 0000000..5c3ea1b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pwm/bcm-kona-pwm.txt
> @@ -0,0 +1,24 @@
> +Broadcom's PWM Controller Device Tree bindings

This sounds somewhat strange, like Broadcom owns the bindings... perhaps
just:

	Broadcom PWM controller device tree bindings

Or for consistency:

	Broadcom Kona PWM controller device tree bindings

since apparently there exist other Broadcom PWM controllers.

> +Broadcom's Kona PWM Controller has 6 channels

"controller" and end the sentence with a full stop.

> +
> +Required Properties :
> +- compatible: should be "brcm,kona-pwm"
> +- reg: physical base address and length of the controller's registers
> +- clocks: clock specifier for the kona pwm external clock

Please use the correct spelling "PWM" in prose here and elsewhere. Also
you should pick one of "kona", "Kona" or "KONA" and stick with it
consistently. Might also be useful to mention what Kona is. Doesn't
necessarily have to be in the document, but if for nothing else, then
just for my curiosity.

> +- #pwm-cells: should be 2.  The first cell specifies the per-chip index
> +  of the PWM to use and the second cell is the period in nanoseconds.
> +
> +Refer to pwm/pwm.txt for generic pwm controller node properties.
> +
> +Refer to clocks/clock-bindings.txt for generic clock consumer
> +properties

This sentence should also end with a full stop.

Thierry

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