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HID: Add device group to modalias

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HID devices are only partially presented to userland.  Hotplugged
devices emit events containing a modalias based on the basic bus,
vendor and product entities. However, in practise a hid device can
depend on details such as a single usb interface or a particular item
in a report descriptor.

This patch adds a device group to the hid device id, and broadcasts it
using uevent and the device modalias.  The module alias generation is
modified to match. As a consequence, a device with a non-zero group
will be processed by the corresponding group driver instead of by the
generic hid driver.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Acked-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Henrik Rydberg
2012-04-23 12:07:02 +02:00
committed by Jiri Kosina
parent a7197c2e41
commit 4d53b8012f
4 changed files with 27 additions and 3 deletions
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3
include/linux/mod_devicetable.h
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@@ -132,10 +132,11 @@ struct usb_device_id {
#define USB_DEVICE_ID_MATCH_INT_PROTOCOL 0x0200
#define HID_ANY_ID (~0)
#define HID_GROUP_ANY 0x0000
struct hid_device_id {
__u16 bus;
__u16 pad1;
__u16 group;
__u32 vendor;
__u32 product;
kernel_ulong_t driver_data