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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.

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hovold 2017-10-10 10:01:52 +02:00 committed by Marcel Holtmann
parent e8bfe868cf
commit 4294625e02
1 changed files with 1 additions and 0 deletions
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1
drivers/bluetooth/Kconfig
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@ -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
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