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HID: Allow bus wildcard matching

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Most HID drivers do not need to know what bus driver is in use.
A generic group driver can drive any hid device, and the device
list should not need to be duplicated for each new bus.

This patch adds wildcard matching to the HID bus, simplifying device
list handling for group drivers.

Change-Id: I11f26a31f3e6edb7d345c6def7e9dbfe6df6bad9
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Acked-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>
This commit is contained in:
Henrik Rydberg 2012-04-23 12:07:04 +02:00 committed by Francescodario Cuzzocrea
parent 6320c98541
commit 2bca687488
3 changed files with 4 additions and 2 deletions
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2
drivers/hid/hid-core.c
View file

@ -1360,7 +1360,7 @@ EXPORT_SYMBOL_GPL(hid_input_report);
static bool hid_match_one_id(struct hid_device *hdev,
const struct hid_device_id *id)
{
return id->bus == hdev->bus &&
return (id->bus == HID_BUS_ANY || id->bus == hdev->bus) &&
(id->group == HID_GROUP_ANY || id->group == hdev->group) &&
(id->vendor == HID_ANY_ID || id->vendor == hdev->vendor) &&
(id->product == HID_ANY_ID || id->product == hdev->product);

1
include/linux/mod_devicetable.h
View file

@ -139,6 +139,7 @@ struct usb_device_id {
#define USB_DEVICE_ID_MATCH_INT_NUMBER 0x0400
#define HID_ANY_ID (~0)
#define HID_BUS_ANY 0xffff
#define HID_GROUP_ANY 0x0000
struct hid_device_id {

3
scripts/mod/file2alias.c
View file

@ -343,7 +343,8 @@ static int do_hid_entry(const char *filename,
id->vendor = TO_NATIVE(id->vendor);
id->product = TO_NATIVE(id->product);
sprintf(alias, "hid:b%04X", id->bus);
sprintf(alias, "hid:");
ADD(alias, "b", id->bus != HID_BUS_ANY, id->bus);
ADD(alias, "g", id->group != HID_GROUP_ANY, id->group);
ADD(alias, "v", id->vendor != HID_ANY_ID, id->vendor);
ADD(alias, "p", id->product != HID_ANY_ID, id->product);