BTN_GRIPL2
[BTN_GRIPL2] = "BtnGripL2", [BTN_GRIPR2] = "BtnGripR2",
input_event(input, EV_KEY, BTN_GRIPL2, !!(b9 & BIT(7)));
input_set_capability(input, EV_KEY, BTN_GRIPL2);
input_report_key(dev, BTN_GRIPL2, data[18] & BIT(3));
input_report_key(dev, BTN_GRIPL2, data[32] & BIT(2));
input_report_key(dev, BTN_GRIPL2, data[18] & BIT(3));
input_report_key(dev, BTN_GRIPL2, data[22] & BIT(3));
BTN_GRIPL, BTN_GRIPL2, /* paddle upper left, lower left */