hid: egalax: Correct for device resolution report error

The firmware of both supported devices report a X/Y maximum of 4095,
whereas in reality, it is eight times larger. Fixed with this patch.
Signed-off-by: NJiri Kosina <jkosina@suse.cz>
Cc: Stephane Chatty <chatty@enac.fr>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

drivers/hid/hid-egalax.c

@@ -54,6 +54,7 @@ static int egalax_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 	case HID_UP_GENDESK:
 		switch (usage->hid) {
 		case HID_GD_X:
+			field->logical_maximum = 32760;
 			hid_map_usage(hi, usage, bit, max,
 					EV_ABS, ABS_MT_POSITION_X);
 			set_abs(input, ABS_MT_POSITION_X, field, 0);
@@ -61,6 +62,7 @@ static int egalax_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 			set_abs(input, ABS_X, field, 0);
 			return 1;
 		case HID_GD_Y:
+			field->logical_maximum = 32760;
 			hid_map_usage(hi, usage, bit, max,
 					EV_ABS, ABS_MT_POSITION_Y);
 			set_abs(input, ABS_MT_POSITION_Y, field, 0);