HID: apple: Bind Apple silicon SPI devices

Apple MacBook keyboards started using HID over SPI in 2015. With the
addition of the SPI HID transport they can be supported by this driver.
Support all product ids over with the Apple SPI vendor id for now.

The Macbook Pro (M1, 13-inch, 2020) uses the same function key mapping
as other Macbook Pros with touchbar and dedicated ESC key.
Apple silicon Macbooks use the same function key mapping as the 2021 and
later Magic Keyboards.

Signed-off-by: Janne Grunau <j@jannau.net>

Author: jannau

drivers/hid/hid-apple.c

@@ -472,6 +472,18 @@ static int hidinput_apple_event(struct hid_device *hid, struct input_dev *input,
 		asc->fn_on = !!value;
 
 	if (real_fnmode) {
+		switch (hid->bus) {
+		case BUS_SPI:
+			switch (hid->product) {
+				case SPI_DEVICE_ID_APPLE_MACBOOK_PRO13_2020:
+				table = macbookpro_dedicated_esc_fn_keys;
+				break;
+			default:
+				table = magic_keyboard_2021_and_2024_fn_keys;
+				break;
+			}
+			break;
+		default:
 		switch (hid->product) {
 		case USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI:
 		case USB_DEVICE_ID_APPLE_ALU_WIRELESS_ISO:
@@ -520,6 +532,7 @@ static int hidinput_apple_event(struct hid_device *hid, struct input_dev *input,
 			else
 				table = apple_fn_keys;
 		}
+		}
 
 		trans = apple_find_translation(table, code);
 
@@ -937,6 +950,10 @@ static int apple_probe(struct hid_device *hdev,
 	struct apple_sc *asc;
 	int ret;
 
+	if (id->bus == BUS_SPI && id->vendor == SPI_VENDOR_ID_APPLE &&
+	    hdev->type != HID_TYPE_SPI_KEYBOARD)
+		return -ENODEV;
+
 	asc = devm_kzalloc(&hdev->dev, sizeof(*asc), GFP_KERNEL);
 	if (asc == NULL) {
 		hid_err(hdev, "can't alloc apple descriptor\n");
@@ -1191,6 +1208,8 @@ static const struct hid_device_id apple_devices[] = {
 		.driver_data = APPLE_NUMLOCK_EMULATION | APPLE_HAS_FN },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY),
 		.driver_data = APPLE_NUMLOCK_EMULATION | APPLE_HAS_FN },
+	{ HID_SPI_DEVICE(SPI_VENDOR_ID_APPLE, HID_ANY_ID),
+		.driver_data = APPLE_HAS_FN | APPLE_ISO_TILDE_QUIRK },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_2021),
 		.driver_data = APPLE_HAS_FN | APPLE_ISO_TILDE_QUIRK | APPLE_RDESC_BATTERY },
 	{ HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_2021),