[PATCH] globalvar: add a globalvar_get helper

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

We have functions to set global variables, but none to get them, but
having a globalvar_get helper could be useful to get code size down when
global variables are disabled, as globalvar_get("var") would be optimized
out, while getenv("global.var") wouldn't. Therefore, add the helper.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 include/globalvar.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/globalvar.h b/include/globalvar.h
index 36a7c7006c76..5fdb70fca911 100644
--- a/include/globalvar.h
+++ b/include/globalvar.h
@@ -10,6 +10,12 @@
 extern struct device global_device;
 
 #ifdef CONFIG_GLOBALVAR
+
+static inline const char *globalvar_get(const char *name)
+{
+	return dev_get_param(&global_device, name);
+}
+
 int globalvar_add_simple(const char *name, const char *value);
 
 void globalvar_remove(const char *name);
@@ -41,6 +47,11 @@ void dev_param_init_from_nv(struct device *dev, const char *name);
 void globalvar_alias_deprecated(const char *newname, const char *oldname);
 
 #else
+static inline const char *globalvar_get(const char *name)
+{
+	return NULL;
+}
+
 static inline int globalvar_add_simple(const char *name, const char *value)
 {
 	return 0;
-- 
2.39.2