On Sat, Oct 07, 2017 at 09:57:40PM +0200, Marcel Holtmann wrote: > Hi Johan, > > >> The current Kconfig for serdev is not compatible when adding ACPI support as it does not work when built as a module as it requires config SERIAL_DEV_CTRL_TTYPORT to be set. This patch makes serdev compiled into the kernel if selected so that config SERIAL_DEV_CTRL_TTYPORT can be correctly set if requiring ACPI support. > >> --- > >> drivers/tty/serdev/Kconfig | 5 +++-- > >> 1 file changed, 3 insertions(+), 2 deletions(-) > >> > >> diff --git a/drivers/tty/serdev/Kconfig b/drivers/tty/serdev/Kconfig > >> index cdc6b820cf93..a9fb09a9c105 100644 > >> --- a/drivers/tty/serdev/Kconfig > >> +++ b/drivers/tty/serdev/Kconfig > >> @@ -2,7 +2,8 @@ > >> # Serial bus device driver configuration > >> # > >> menuconfig SERIAL_DEV_BUS > >> - tristate "Serial device bus" > >> + bool "Serial device bus" > >> + default y > > > > I understand why you want this (to prevent hci_bcm from breaking), but we > > should generally not have new entries default to y. > > > >> help > >> Core support for devices connected via a serial port. > >> > >> @@ -11,6 +12,6 @@ if SERIAL_DEV_BUS > >> config SERIAL_DEV_CTRL_TTYPORT > >> bool "Serial device TTY port controller" > >> depends on TTY > >> - depends on SERIAL_DEV_BUS != m > >> + default y > > > > Same here. > > > > It may be better to have BT_HCIUART_BCM depend on (or select?) > > SERIAL_DEV_CTRL_TTYPORT instead. > > if we move SERIAL_DEV_BUS to bool, then I would just have it be > selected by BT_HCIUART_BCM. Frankly the SERIAL_DEV_BUS option is > pretty hard to find in the kernel config. And if we depend on TTY, but > then select SERIAL_DEV_BUS, I think that is a good compromise. The Bluetooth UART drivers already depend on on SERIAL_DEV_BUS (through BT_HCIUART_SERDEV). And the problem with BT_HCIUART_BCM is that the current ACPI devices really need SERIAL_DEV_CTRL_TTYPORT (and not just serdev core). And we should probably try to avoid selecting options if we can (to avoid ending up with unmet dependencies). Johan -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
