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kconfig-language: elaborate on the type of a choice 

The type of a choice can be specified explicitely or it will be
set according to members of the choice group, see menu.c:menu_finalize().

Signed-off-by: Dirk Gouders <dirk@gouders.net>
Signed-off-by: Michal Marek <mmarek@suse.com>
This commit is contained in:
Dirk Gouders 2016-04-29 12:43:38 +02:00 committed by Michal Marek
parent 3e2ba95f43
commit 032a318719
1 changed files with 11 additions and 6 deletions
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17
Documentation/kbuild/kconfig-language.txt
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@ -284,12 +284,17 @@ choices:
"endchoice"
This defines a choice group and accepts any of the above attributes as
options. A choice can only be of type bool or tristate, while a boolean
choice only allows a single config entry to be selected, a tristate
choice also allows any number of config entries to be set to 'm'. This
can be used if multiple drivers for a single hardware exists and only a
single driver can be compiled/loaded into the kernel, but all drivers
can be compiled as modules.
options. A choice can only be of type bool or tristate. If no type is
specified for a choice, it's type will be determined by the type of
the first choice element in the group or remain unknown if none of the
choice elements have a type specified, as well.
While a boolean choice only allows a single config entry to be
selected, a tristate choice also allows any number of config entries
to be set to 'm'. This can be used if multiple drivers for a single
hardware exists and only a single driver can be compiled/loaded into
the kernel, but all drivers can be compiled as modules.
A choice accepts another option "optional", which allows to set the
choice to 'n' and no entry needs to be selected.
If no [symbol] is associated with a choice, then you can not have multiple