[PATCH 17/17] kconfig: Add a new CONFIG() macro

[Simon Glass]

It is annoying to have to use IS_ENABLED() and CONFIG_IS_ENABLED(),
depending on whether the option being checked has an SPL version. Also
we use #ifdef CONFIG_xxx and #if defined(CONFIG_xxx) in some contexts.
It would be nice to use a single style consistenty.

Add a CONFIG() macro to this end, to check configuration. The argument is
the Kconfig name to check, excluding any SPL_/TPL_ prefix, for example:

   CONFIG(DM)
   CONFIG(CMD_MISC)
   CONFIG(OF_PLATDATA)

This is just for illustration, but it should be possible to drop
IS_ENABLED() and CONFIG_IS_ENABLED(), once migration of ad-hoc CONFIG
is complete. The use of #ifdef and defined() can be updated also.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 include/linux/kconfig.h | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/include/linux/kconfig.h b/include/linux/kconfig.h
index e6b0f238ec4..401341275fe 100644
--- a/include/linux/kconfig.h
+++ b/include/linux/kconfig.h
@@ -28,14 +28,6 @@
 #define __config_enabled(arg1_or_junk) ___config_enabled(arg1_or_junk 1, 0)
 #define ___config_enabled(__ignored, val, ...) val
 
-/*
- * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y',
- * 0 otherwise.
- *
- */
-#define IS_ENABLED(option) \
-	(config_enabled(option))
-
 /*
  * The _nospl version of a CONFIG is emitted by kconfig when an option has no
  * SPL equivalent. So in that case there is a CONFIG_xxx for example, but not a
@@ -51,11 +43,11 @@
 	config_enabled(CONFIG_ ## cfg))
 
 /*
- * CONFIG_IS_ENABLED(FOO) returns 1 if CONFIG_FOO is enabled for the phase being
+ * CONFIG(FOO) returns 1 if CONFIG_FOO is enabled for the phase being
  * built, else 0. Note that CONFIG_FOO corresponds to CONFIG_SPL_FOO (in
  * Kconfig) for the SPL phase, CONFIG_TPL_FOO for the TPL phase, etc.
  */
-#define CONFIG_IS_ENABLED(option) __config_is_enabled(option)
+#define CONFIG(option) __config_is_enabled(option)
 
 #define __config_val(cfg) CONFIG_ ## cfg
 
-- 
2.33.0.309.g3052b89438-goog