linux-kernel - Re: [PATCH 5/5] Input: Add ChromeOS EC keyboard driver

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Date:	Sat, 15 Dec 2012 01:13:45 +0000
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Simon Glass <sjg@...omium.org>, LKML <linux-kernel@...r.kernel.org>
Cc:	Samuel Ortiz <sameo@...ux.intel.com>,
	Simon Glass <sjg@...omium.org>,
	Luigi Semenzato <semenzato@...omium.org>,
	Vincent Palatin <vpalatin@...omium.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Sourav Poddar <sourav.poddar@...com>,
	Felipe Balbi <balbi@...com>, Olof Johansson <olof@...om.net>,
	Roland Stigge <stigge@...com.de>,
	Wolfram Sang <w.sang@...gutronix.de>,
	devicetree-discuss@...ts.ozlabs.org, linux-doc@...r.kernel.org,
	linux-input@...r.kernel.org
Subject: Re: [PATCH 5/5] Input: Add ChromeOS EC keyboard driver

On Wed, 12 Dec 2012 13:33:48 -0800, Simon Glass <sjg@...omium.org> wrote:
> Use the key-matrix layer to interpret key scan information from the EC
> and inject input based on the FDT-supplied key map. This driver registers
> itself with the ChromeOS EC driver to perform communications.
> 
> Additional FDT bindings are provided to specify rows/columns and the
> auto-repeat information.
> 
> Signed-off-by: Simon Glass <sjg@...omium.org>
> Signed-off-by: Luigi Semenzato <semenzato@...omium.org>
> Signed-off-by: Vincent Palatin <vpalatin@...omium.org>
> ---
>  .../devicetree/bindings/input/cros-ec-keyb.txt     |   77 ++++
>  drivers/input/keyboard/Kconfig                     |   10 +
>  drivers/input/keyboard/Makefile                    |    1 +
>  drivers/input/keyboard/cros_ec_keyb.c              |  413 ++++++++++++++++++++
>  4 files changed, 501 insertions(+), 0 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/input/cros-ec-keyb.txt
>  create mode 100644 drivers/input/keyboard/cros_ec_keyb.c
> 
> diff --git a/Documentation/devicetree/bindings/input/cros-ec-keyb.txt b/Documentation/devicetree/bindings/input/cros-ec-keyb.txt
> new file mode 100644
> index 0000000..67f51d8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/cros-ec-keyb.txt
> @@ -0,0 +1,77 @@
> +ChromeOS EC Keyboard
> +
> +Google's ChromeOS EC Keyboard is a simple matrix keyboard implemented on
> +a separate EC (Embedded Controller) device. It provides a message for reading
> +key scans from the EC. These are then converted into keycodes for processing
> +by the kernel.
> +
> +Required properties:
> +- compatible: "google,cros-ec-keyb"
> +- google,key-rows: Number of keyboard rows (must be <= 8)
> +- google,key-columns: Number of keyboard columns (must be <= 13)
> +- google,repeat-delay-ms: Key repeat delay in milliseconds
> +- google,repeat-rate-ms: Key repeat rate in milliseconds

Hmmm, these should probably be in a common binding. Take a look at
the other input bindings and make a proposal for properties to add to
matrix-keymap.txt.

> +- linux.keymap: Key map as for matrix-keypad.txt

should be: linux,keymap (comma instead of period)

g.
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