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

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Date:	Fri, 23 May 2008 17:09:55 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	linux-input@...r.kernel.org
Cc:	linu-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] Add switch for dock events

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)

-- 
Matthew Garrett | mjg59@...f.ucam.org
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