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HID: multitouch: add support of clickpads

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Touchpads that have only one button are called clickpads and should
be advertised as such by the kernel.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Tested-by: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Benjamin Tissoires 2015-03-06 11:14:42 -05:00 committed by Jiri Kosina
parent c4bbb39806
commit 015fdaa9f8
1 changed files with 9 additions and 0 deletions
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9
drivers/hid/hid-multitouch.c
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@ -116,6 +116,7 @@ struct mt_device {
__u8 touches_by_report; /* how many touches are present in one report:
* 1 means we should use a serial protocol
* > 1 means hybrid (multitouch) protocol */
__u8 buttons_count; /* number of physical buttons per touchpad */
bool serial_maybe; /* need to check for serial protocol */
bool curvalid; /* is the current contact valid? */
unsigned mt_flags; /* flags to pass to input-mt */
@ -379,6 +380,10 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
}
/* count the buttons on touchpads */
if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
td->buttons_count++;
if (usage->usage_index)
prev_usage = &field->usage[usage->usage_index - 1];
@ -728,6 +733,10 @@ static void mt_touch_input_configured(struct hid_device *hdev,
if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
td->mt_flags |= INPUT_MT_DROP_UNUSED;
/* check for clickpads */
if ((td->mt_flags & INPUT_MT_POINTER) && (td->buttons_count == 1))
__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
td->mt_flags = 0;