linux-kernel - Re: [PATCH 1/3] Device tree binding documentation for chromeos-firmware

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Date:	Wed, 2 Dec 2015 09:15:52 -0600
From:	Rob Herring <robh@...nel.org>
To:	Martyn Welch <martyn.welch@...labora.co.uk>
Cc:	Olof Johansson <olof@...om.net>, linux-kernel@...r.kernel.org,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH 1/3] Device tree binding documentation for
 chromeos-firmware

On Tue, Dec 01, 2015 at 07:12:49PM +0000, Martyn Welch wrote:
> This patch adds documentation for the chromeos-firmware binding.
> 
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: Pawel Moll <pawel.moll@....com>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Ian Campbell <ijc+devicetree@...lion.org.uk>
> Cc: Kumar Gala <galak@...eaurora.org>
> Cc: devicetree@...r.kernel.org
> Signed-off-by: Martyn Welch <martyn.welch@...labora.co.uk>
> ---
>  .../devicetree/bindings/misc/chromeos-firmware.txt | 27 ++++++++++++++++++++++

bindings/firmware/ please.

>  1 file changed, 27 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/misc/chromeos-firmware.txt
> 
> diff --git a/Documentation/devicetree/bindings/misc/chromeos-firmware.txt b/Documentation/devicetree/bindings/misc/chromeos-firmware.txt
> new file mode 100644
> index 0000000..8240611
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/misc/chromeos-firmware.txt
> @@ -0,0 +1,27 @@
> +Device-Tree bindings for chromeos-firmware.c.

Perhaps a bit more description what this is.

What aspect of this is firmware? How does this relate to the EC?

> +
> +Required properties:
> +	- compatible = "google,gpio-firmware";

No versions?

> +
> +Each signal is represented as a sub-node of "chromeos_firmware":
> +Subnode properties:
> +
> +	- gpios: OF device-tree gpio specification.
> +
> +Example nodes:
> +
> +	chromeos_firmware {

This should go under /firmware

> +		compatible = "google,gpio-firmware";
> +
> +		write-protect {

You need to define what are valid sub nodes. The example is not 
documentation.

> +			gpios = <&gpx3 0 GPIO_ACTIVE_LOW>;
> +		};
> +
> +		developer-switch {
> +			gpios = <&gpx1 3 GPIO_ACTIVE_HIGH>;
> +		};
> +
> +		recovery-switch {
> +			gpios = <&gpx0 7 GPIO_ACTIVE_LOW>;
> +		};
> +	};
> -- 
> 2.1.4
> 
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