[PATCH 3/3] HID: apple: Magic Keyboard 2015 FN key mapping

["José Expósito" <jose.exposito89@gmail.com>]

The Magic Keyboard 2015 function key mapping was not present and the
default mapping was used.
While this worked for most keys, the F5 and F6 keys were sending
KEY_KBDILLUMDOWN and KEY_KBDILLUMUP; however, the keyboard is not
backlited.

Add a custom translation table for the keyboard leaving F5 and F6
unassigned to mimic the default behavior on macOS.

Signed-off-by: José Expósito <jose.exposito89@gmail.com>
---
 drivers/hid/hid-apple.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/hid/hid-apple.c b/drivers/hid/hid-apple.c
index bea752da4ac3..d0f23da11dfd 100644
--- a/drivers/hid/hid-apple.c
+++ b/drivers/hid/hid-apple.c
@@ -91,6 +91,26 @@ static const struct apple_key_translation magic_keyboard_alu_fn_keys[] = {
 	{ }
 };
 
+static const struct apple_key_translation magic_keyboard_2015_fn_keys[] = {
+	{ KEY_BACKSPACE, KEY_DELETE },
+	{ KEY_ENTER,	KEY_INSERT },
+	{ KEY_F1,	KEY_BRIGHTNESSDOWN, APPLE_FLAG_FKEY },
+	{ KEY_F2,	KEY_BRIGHTNESSUP,   APPLE_FLAG_FKEY },
+	{ KEY_F3,	KEY_SCALE,          APPLE_FLAG_FKEY },
+	{ KEY_F4,	KEY_DASHBOARD,      APPLE_FLAG_FKEY },
+	{ KEY_F7,	KEY_PREVIOUSSONG,   APPLE_FLAG_FKEY },
+	{ KEY_F8,	KEY_PLAYPAUSE,      APPLE_FLAG_FKEY },
+	{ KEY_F9,	KEY_NEXTSONG,       APPLE_FLAG_FKEY },
+	{ KEY_F10,	KEY_MUTE,           APPLE_FLAG_FKEY },
+	{ KEY_F11,	KEY_VOLUMEDOWN,     APPLE_FLAG_FKEY },
+	{ KEY_F12,	KEY_VOLUMEUP,       APPLE_FLAG_FKEY },
+	{ KEY_UP,	KEY_PAGEUP },
+	{ KEY_DOWN,	KEY_PAGEDOWN },
+	{ KEY_LEFT,	KEY_HOME },
+	{ KEY_RIGHT,	KEY_END },
+	{ }
+};
+
 static const struct apple_key_translation macbookair_fn_keys[] = {
 	{ KEY_BACKSPACE, KEY_DELETE },
 	{ KEY_ENTER,	KEY_INSERT },
@@ -254,6 +274,9 @@ static int hidinput_apple_event(struct hid_device *hid, struct input_dev *input,
 		    hid->product == USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO ||
 		    hid->product == USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_JIS)
 			table = magic_keyboard_alu_fn_keys;
+		else if (hid->product == USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_2015 ||
+			 hid->product == USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_NUMPAD_2015)
+			table = magic_keyboard_2015_fn_keys;
 		else if (hid->product >= USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI &&
 				hid->product <= USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS)
 			table = macbookair_fn_keys;
@@ -407,6 +430,7 @@ static void apple_setup_input(struct input_dev *input)
 	apple_setup_key_translation(input, powerbook_numlock_keys);
 	apple_setup_key_translation(input, apple_iso_keyboard);
 	apple_setup_key_translation(input, magic_keyboard_alu_fn_keys);
+	apple_setup_key_translation(input, magic_keyboard_2015_fn_keys);
 
 	if (swap_fn_leftctrl)
 		apple_setup_key_translation(input, swapped_fn_leftctrl_keys);
-- 
2.25.1