Bluetooth: avoid silent hci_bcm ACPI PM regression

The hci_bcm platform-device hack which was used to implement power management for ACPI devices is being replaced by a serial-device-bus implementation.

Unfortunately, when the corresponding change to the ACPI code lands (a change that will stop enumerating and registering the serial-device-node child as a platform device) PM will break silently unless serdev TTY-port controller support has been enabled. Specifically, hciattach (btattach) would still succeed, but power management would no longer work.

Although this is strictly a runtime dependency, let's make the driver depend on SERIAL_DEV_CTRL_TTYPORT, which is the particular serdev controller implementation used by the ACPI devices currently managed by this driver, to avoid breaking PM without anyone noticing.

Note that the driver already has a (build-time) dependency on the serdev bus code.

---
 drivers/bluetooth/Kconfig | 1 +
 1 file changed, 1 insertion(+)

index fae5a74dc737..082e1c7329de 100644
@@ -169,6 +169,7 @@ config BT_HCIUART_BCM
 	bool "Broadcom protocol support"
 	depends on BT_HCIUART
 	depends on BT_HCIUART_SERDEV
+	depends on (!ACPI || SERIAL_DEV_CTRL_TTYPORT)
 	select BT_HCIUART_H4
 	select BT_BCM
 	help

2.14.2

Hi Johan,

patch has been applied to bluetooth-next tree.

Regards

Marcel