linux-kernel - Re: [PATCH] Add switch for dock events

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Message-Id: <20080523182300.bd05ec54.akpm@linux-foundation.org>
Date:	Fri, 23 May 2008 18:23:00 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	linux-input@...r.kernel.org, linu-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Add switch for dock events

On Fri, 23 May 2008 17:09:55 +0100 Matthew Garrett <mjg59@...f.ucam.org> wrote:

> Add a switch to signal dock events to userspace.
> 
> Signed-off-by: Matthew Garrett <mjg@...hat.com>
> 
> ---
> 
> I've done this as an input event rather than anything else since there 
> isn't necessarily a terribly coherent concept of a dock device. HPs (for 
> example) don't use ACPI for docking - the dock is simply an extension of 
> devices that are already on the system. We can't sensibly create a dock 
> platform device and then generate uevents on it. Doing it this way lets 
> us standardise on a way to send docking events to userspace, which lets 
> desktops do things like automatically expand onto external monitors when 
> the system is docked.
> 
> diff --git a/include/linux/input.h b/include/linux/input.h
> index 28a094f..0bc55ee 100644
> --- a/include/linux/input.h
> +++ b/include/linux/input.h
> @@ -638,6 +638,7 @@ struct input_absinfo {
>  #define SW_TABLET_MODE		0x01  /* set = tablet mode */
>  #define SW_HEADPHONE_INSERT	0x02  /* set = inserted */
>  #define SW_RADIO		0x03  /* set = radio enabled */
> +#define SW_DOCK			0x04  /* set = plugged into dock */
>  #define SW_MAX			0x0f
>  #define SW_CNT			(SW_MAX+1)
> 
> 

Confused.  This patch doesn't do anything.

Also, please sort out the changelogging?

- The one-line changelog you have there would make a decent _title_. 
  Better than the one which was actually chosen.

- The not-to-be-included discussion which you have below the "---"
  cutoff line would make a reasonable changelog.

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