Hi all,
menuconfig SOUNDWIRE
tristate "SoundWire support"
depends on ACPI || OF
"depends on ACPI || OF" mean, SOUNDWIRE depends on both ACPI and OF modules?
config SOUNDWIRE_QCOM
tristate "Qualcomm SoundWire Master driver"
imply SLIMBUS
What does "imply SLIMBUS" mean?
--
Thanks,
Sekhar
Hi--
On 5/31/22 05:14, Muni Sekhar wrote:
> Hi all,
>
> menuconfig SOUNDWIRE
> tristate "SoundWire support"
> depends on ACPI || OF
>
> "depends on ACPI || OF" mean, SOUNDWIRE depends on both ACPI and OF modules?
>
"||" is logical OR, so SOUNDWIRE depends on either ACPI or OF (or both
of them can be enabled).
>
> config SOUNDWIRE_QCOM
> tristate "Qualcomm SoundWire Master driver"
> imply SLIMBUS
>
> What does "imply SLIMBUS" mean?
See Documentation/kbuild/kconfig-language.rst:
- weak reverse dependencies: "imply" <symbol> ["if" <expr>]
This is similar to "select" as it enforces a lower limit on another
symbol except that the "implied" symbol's value may still be set to n
from a direct dependency or with a visible prompt.
So (in your example) SLIMBUS is desired but not required.
That means that the code that is built for SOUNDWIRE_QCOM
probably needs to use IS_REACHABLE(CONFIG_SLIMBUS) to
see if that SLIMBUS code is available at build time.
HTH.
--
~Randy