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HID: alps: allow incoming reports when only the trackstick is opened

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If userspace only reads the trackstick node, and no one is listening to
the touchpad nor the hidraw node then, the device is not powered on.

Add open/close callbacks to allow users to disable the touchpad in Gnome
while keeping the trackstick active.

Link: https://bugzilla.redhat.com/show_bug.cgi?id=1559632
Link: https://gitlab.gnome.org/GNOME/mutter/issues/128
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Benjamin Tissoires 2018-10-12 16:05:25 +02:00 committed by Jiri Kosina
parent 6298944d8f
commit 7dd8db6894
1 changed files with 18 additions and 0 deletions
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18
drivers/hid/hid-alps.c
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@ -660,6 +660,20 @@ static int T4_init(struct hid_device *hdev, struct alps_dev *pri_data)
return ret;
}
static int alps_sp_open(struct input_dev *dev)
{
struct hid_device *hid = input_get_drvdata(dev);
return hid_hw_open(hid);
}
static void alps_sp_close(struct input_dev *dev)
{
struct hid_device *hid = input_get_drvdata(dev);
hid_hw_close(hid);
}
static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
{
struct alps_dev *data = hid_get_drvdata(hdev);
@ -733,6 +747,10 @@ static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
input2->id.version = input->id.version;
input2->dev.parent = input->dev.parent;
input_set_drvdata(input2, hdev);
input2->open = alps_sp_open;
input2->close = alps_sp_close;
__set_bit(EV_KEY, input2->evbit);
data->sp_btn_cnt = (data->sp_btn_info & 0x0F);
for (i = 0; i < data->sp_btn_cnt; i++)