Hi Hans,

On Mon, Nov 22, 2021 at 11:06:37PM +0100, Hans de Goede wrote:

+	input_set_capability(data->pen_input, EV_KEY, BTN_TOUCH);
+	input_set_capability(data->pen_input, EV_KEY, BTN_TOOL_PEN);
+	/*
+	 * We never report BTN_STYLUS but userspace want to see this in order
+	 * for the device to be recognized as a pen / drawing-tablet.
+	 */

What userspace is that? I see that udev recognizes devices with either
stylus or pen  as tablets since at least 2015.

I am really hesitant adding synthetic capabilities that do not have real
events behind them.

Thanks.

-- 
Dmitry