HID: Add Tablet Pick -> BTN_STYLUS2 mapping
authorNikolai Kondrashov <spbnick@gmail.com>
Fri, 6 Aug 2010 19:03:07 +0000 (23:03 +0400)
committerJiri Kosina <jkosina@suse.cz>
Mon, 9 Aug 2010 17:52:43 +0000 (19:52 +0200)
Many tablet input drivers use BTN_STYLUS2 code to report a second
tablet stylus button. Yet, the generic HID input driver doesn't map it.
Apparently, because there is no corresponding usage in the HID Usage Tables.

This patch selects a compromise usage - "Tablet Pick" (0x46) to be mapped to
BTN_STYLUS2. Some tablets use "Eraser" usage, but mapping it to a button
wouldn't be entirely correct, because the specification says it may be "a
pressure quantity".

Signed-off-by: Nikolai Kondrashov <spbnick@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
drivers/hid/hid-input.c

index 6c03dcc5760a277097bb17d866cc33aa17db484a..0c2908f2dbe33712e327f112d4523ee8c892f9ba 100644 (file)
@@ -336,6 +336,10 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
                        map_key_clear(BTN_STYLUS);
                        break;
 
+               case 0x46: /* TabletPick */
+                       map_key_clear(BTN_STYLUS2);
+                       break;
+
                default:  goto unknown;
                }
                break;