Bluetooth: hci_bcm4377: Add new driver for BCM4377 PCIe boards

Broadcom BCM4377/4378/4387 are dual WiFi/Bluetooth boards found in Apple
machines. This driver adds support for the Bluetooth function which
exposes a shared memory IPC protocol over PCIe to tunnel HCI traffic.
Signed-off-by: Sven Peter <sven@svenpeter.dev>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

MAINTAINERS

@@ -1911,6 +1911,7 @@ F:	Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml
 F:	Documentation/devicetree/bindings/power/apple*
 F:	Documentation/devicetree/bindings/watchdog/apple,wdt.yaml
 F:	arch/arm64/boot/dts/apple/
+F:	drivers/bluetooth/hci_bcm4377.c
 F:	drivers/clk/clk-apple-nco.c
 F:	drivers/dma/apple-admac.c
 F:	drivers/i2c/busses/i2c-pasemi-core.c

drivers/bluetooth/Kconfig

@@ -285,6 +285,18 @@ config BT_HCIBCM203X
 	  Say Y here to compile support for HCI BCM203x devices into the
 	  kernel or say M to compile it as module (bcm203x).
 
+
+config BT_HCIBCM4377
+	tristate "HCI BCM4377/4378/4387 PCIe driver"
+	depends on PCI
+	select FW_LOADER
+	help
+	  Support for Broadcom BCM4377/4378/4387 Bluetooth chipsets attached via
+	  PCIe. These are usually found in Apple machines.
+
+	  Say Y here to compile support for HCI BCM4377 family devices into the
+	  kernel or say M to compile it as module (hci_bcm4377).
+
 config BT_HCIBPA10X
 	tristate "HCI BPA10x USB driver"
 	depends on USB

drivers/bluetooth/Makefile

@@ -6,6 +6,7 @@
 obj-$(CONFIG_BT_HCIVHCI)	+= hci_vhci.o
 obj-$(CONFIG_BT_HCIUART)	+= hci_uart.o
 obj-$(CONFIG_BT_HCIBCM203X)	+= bcm203x.o
+obj-$(CONFIG_BT_HCIBCM4377)	+= hci_bcm4377.o
 obj-$(CONFIG_BT_HCIBPA10X)	+= bpa10x.o
 obj-$(CONFIG_BT_HCIBFUSB)	+= bfusb.o
 obj-$(CONFIG_BT_HCIDTL1)	+= dtl1_cs.o