[PATCH v4 2/7] HID: asus: Add missing Zenbook Duo hotkeys

[Paolo Pisati <p.pisati@gmail.com>]

From: Joshua Leivenzon <hacker1024@users.sourceforge.net>

Map the Zenbook Duo "screen swap" hotkey (vendor usage 0x9c) to
KEY_F19, like the other ASUS vendor keys that have no dedicated
keycode, so that userspace can bind it.

Unlike the keys of devices with built-in keyboards, which can share
keycodes freely, this one has to stay unique: the Zenbook Duo keyboard
is a standard USB/Bluetooth device and can be connected to another ASUS
machine handled by this driver. Say so next to the mapping.

Signed-off-by: Joshua Leivenzon <hacker1024@users.sourceforge.net>
[pisati: drop the MyASUS key (0x86) mapping, 2061075360182 ("HID:
 asus: support the Zenbook A16 (UX3607OA) keyboard") maps it to
 KEY_PROG1 like asus-nb-wmi does, and shorten the comment]
Signed-off-by: Paolo Pisati <p.pisati@gmail.com>
Tested-by: Rebecca Mara Müller <rebecca.mara@posteo.de> # UX8407AA
---
 drivers/hid/hid-asus.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c
index c2ba2d825191..54f4d68eecc7 100644
--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -1316,6 +1316,8 @@ static int asus_input_mapping(struct hid_device *hdev,
 		case 0xb3: asus_map_key_clear(KEY_PROG3);	break; /* Fn+Left next aura */
 		case 0x6a: asus_map_key_clear(KEY_F13);		break; /* Screenpad toggle */
 		case 0x4b: asus_map_key_clear(KEY_F14);		break; /* Arrows/Pg-Up/Dn toggle */
+		/* Keep unique: the Zenbook Duo keyboard also pairs with other laptops */
+		case 0x9c: asus_map_key_clear(KEY_F19);		break; /* Screen swap */
 		case 0xa5: asus_map_key_clear(KEY_F15);		break; /* ROG Ally left back */
 		case 0xa6: asus_map_key_clear(KEY_F16);		break; /* ROG Ally QAM button */
 		case 0xa7: asus_map_key_clear(KEY_F17);		break; /* ROG Ally ROG long-press */
-- 
2.43.0