Input: sparse-keymap - report KEY_UNKNOWN for unknown scan codes
This allows for debugging non-functional keys easily from
userspace.
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/sparse-keymap.c b/drivers/input/sparse-keymap.c
index 74bca5d..fdb6a39 100644
--- a/drivers/input/sparse-keymap.c
+++ b/drivers/input/sparse-keymap.c
@@ -209,6 +209,7 @@
}
if (test_bit(EV_KEY, dev->evbit)) {
+ __set_bit(KEY_UNKNOWN, dev->keybit);
__set_bit(EV_MSC, dev->evbit);
__set_bit(MSC_SCAN, dev->mscbit);
}
@@ -311,12 +312,19 @@
{
const struct key_entry *ke =
sparse_keymap_entry_from_scancode(dev, code);
+ struct key_entry unknown_ke;
if (ke) {
sparse_keymap_report_entry(dev, ke, value, autorelease);
return true;
}
+ /* Report an unknown key event as a debugging aid */
+ unknown_ke.type = KE_KEY;
+ unknown_ke.code = code;
+ unknown_ke.keycode = KEY_UNKNOWN;
+ sparse_keymap_report_entry(dev, &unknown_ke, value, true);
+
return false;
}
EXPORT_SYMBOL(sparse_keymap_report_event);