devres: make Devres optional with CONFIG_DEVRES
Currently, Devres requires additional 16 byte for each allocation,
which is not so insignificant in some cases.
Add CONFIG_DEVRES to make this framework optional.
If the option is disabled, devres functions fall back to
non-managed variants. For example, devres_alloc() to kzalloc(),
devm_kmalloc() to kmalloc(), etc.
Because devres_head is also surrounded by an ifdef conditional,
there is no memory overhead when CONFIG_DEVRES is disabled.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Suggested-by: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/core/Kconfig b/drivers/core/Kconfig
index a002d69..8ae0072 100644
--- a/drivers/core/Kconfig
+++ b/drivers/core/Kconfig
@@ -79,9 +79,22 @@
by this uclass, including accessing registers via regmap and
assigning a unique number to each.
+config DEVRES
+ bool "Managed device resources"
+ depends on DM
+ help
+ This option enables the Managed device resources core support.
+ Device resources managed by the devres framework are automatically
+ released whether initialization fails half-way or the device gets
+ detached.
+
+ If this option is disabled, devres functions fall back to
+ non-managed variants. For example, devres_alloc() to kzalloc(),
+ devm_kmalloc() to kmalloc(), etc.
+
config DEBUG_DEVRES
bool "Managed device resources verbose debug messages"
- depends on DM
+ depends on DEVRES
help
If this option is enabled, devres debug messages are printed.
Select this if you are having a problem with devres or want to