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authorDirk Gouders <dirk@gouders.net>2016-04-29 12:43:38 +0200
committerMichal Marek <mmarek@suse.com>2016-05-10 17:30:14 +0200
commit032a3187194e050383d7c2df804b194b6fecc6f3 (patch)
tree9920a4ba1e08d6cac24130fab394909aa15f2b15 /Documentation/kbuild
parent3e2ba95f43360f22b882965d153e9cf3087de986 (diff)
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>
Diffstat (limited to 'Documentation/kbuild')
-rw-r--r--Documentation/kbuild/kconfig-language.txt17
1 files changed, 11 insertions, 6 deletions
diff --git a/Documentation/kbuild/kconfig-language.txt b/Documentation/kbuild/kconfig-language.txt
index 14dd13150aa3..db101857b2c9 100644
--- a/Documentation/kbuild/kconfig-language.txt
+++ b/Documentation/kbuild/kconfig-language.txt
@@ -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