Bluetooth: Add N1 protocol-27 HCI and ACL transport

Documentation/devicetree/bindings/net/bluetooth/apple,centauri.yaml

@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/bluetooth/apple,centauri.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple N1 Centauri Beta Bluetooth PCI function
+
+maintainers:
+  - Dj <hey@djdev.me>
+
+description: |
+  PCI function two is the Beta Bluetooth HCI/ACL transport. It depends on
+  the Control function in the same PCI slot, which boots the shared N1
+  firmware using the protocol profile described on its own DT node.
+  The factory address is supplied in network byte order for the firmware
+  address-provisioning command; HCI returns the standard Bluetooth order.
+
+properties:
+  compatible:
+    const: pci106b,1903
+
+  reg:
+    maxItems: 1
+    description: Standard five-cell PCI function address
+
+  local-mac-address:
+    $ref: /schemas/types.yaml#/definitions/uint8-array
+    minItems: 6
+    maxItems: 6
+    description: Factory Bluetooth public address in network byte order
+
+required:
+  - compatible
+  - reg
+  - local-mac-address
+
+additionalProperties: false

drivers/bluetooth/Kconfig

@@ -507,3 +507,11 @@ config BT_INTEL_PCIE
 	  Say Y here to compiler support for Intel Bluetooth PCIe device into
 	  the kernel or say M to compile it as module (btintel_pcie)
 endmenu
+
+config BT_HCICENTAURI
+	tristate "Apple N1 Centauri Bluetooth"
+	depends on BT && PCI && APPLE_CENTAURI
+	help
+	  Protocol-27 Beta HCI and ACL transport using the shared N1 firmware.
+	  Requires the Control supplier and a DT-provided device address.
+	  SCO and ISO delivery are not implemented by this driver.

drivers/bluetooth/Makefile

@@ -54,3 +54,4 @@ hci_uart-objs				:= $(hci_uart-y)
 obj-$(CONFIG_BT_MTK7932_PCIE) += mt7932_bt_pcie.o
 
 CONTEXT_ANALYSIS := y
+obj-$(CONFIG_BT_HCICENTAURI) += btcentauri.o