Re: [PATCH v2 1/3] hid-multitouch: add support for trackpads
From: Benjamin Tissoires
Date: Tue Jan 24 2012 - 09:34:14 EST
Hi Dmitry and Henrik,
Thanks Dmitry for the comment.
I'll do the change as you mentioned and will also remove the
input_mt_report_finger_count call.
Cheers,
Benjamin
On Fri, Jan 20, 2012 at 17:48, Dmitry Torokhov
<dmitry.torokhov@xxxxxxxxx> wrote:
> On Fri, Jan 20, 2012 at 05:09:48PM +0100, Henrik Rydberg wrote:
>> Hi Benjamin,
>>
>> > @@ -389,9 +404,19 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
>> > td->last_field_index = field->index;
>> > return -1;
>> > }
>> > + case HID_DG_TOUCH:
>> > + /* Legacy devices use TIPSWITCH and not TOUCH.
>> > + * Let's just ignore this field. */
>> > + return -1;
>> > /* let hid-input decide for the others */
>> > return 0;
>> >
>> > + case HID_UP_BUTTON:
>> > + code = ((usage->hid - 1) & HID_USAGE) + BTN_MOUSE;
>>
>> Why '+' here instead of '|' is beyond me...
>
> Because it is an offset for the range. The fact that it is on power 2
> boundary and we can use "|" is purely coincidential here.
>
> Maybe we should even write it as:
>
> code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
>
> Thanks,
> Dmitry
>
> --
> Dmitry
> --
> To unsubscribe from this list: send the line "unsubscribe linux-input" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at http://vger.kernel.org/majordomo-info.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/