[PATCH] bootsource: export bootsource_to_string()

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

bootsource_str which translates enum bootsource to a string is not
exported to other parts of barebox. Define a new bootsource_to_string()
that provides access. This can be useful for board code debugging
prints, especially in PBL, where the $bootsource environment variable
is not available.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 common/Makefile      |  2 +-
 common/bootsource.c  | 14 +++++++++++---
 include/bootsource.h |  2 ++
 3 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/common/Makefile b/common/Makefile
index 35f2120496ea..25f5653f906a 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -11,7 +11,7 @@ obj-y				+= startup.o
 obj-y				+= misc.o
 obj-pbl-y			+= memsize.o
 obj-y				+= resource.o
-obj-y				+= bootsource.o
+obj-pbl-y			+= bootsource.o
 obj-$(CONFIG_ELF)		+= elf.o
 obj-y				+= restart.o
 obj-y				+= poweroff.o
diff --git a/common/bootsource.c b/common/bootsource.c
index 70bac945de5a..66bddf2dacf4 100644
--- a/common/bootsource.c
+++ b/common/bootsource.c
@@ -10,7 +10,7 @@
 #include <magicvar.h>
 #include <init.h>
 
-static const char *bootsource_str[] = {
+static const char *bootsource_str[BOOTSOURCE_MAX] = {
 	[BOOTSOURCE_UNKNOWN] = "unknown",
 	[BOOTSOURCE_NAND] = "nand",
 	[BOOTSOURCE_NOR] = "nor",
@@ -33,6 +33,14 @@ static enum bootsource bootsource = BOOTSOURCE_UNKNOWN;
 static int bootsource_instance = BOOTSOURCE_INSTANCE_UNKNOWN;
 const char *bootsource_alias_name = NULL;
 
+const char *bootsource_to_string(enum bootsource src)
+{
+	if (src >= ARRAY_SIZE(bootsource_str))
+		return NULL;
+
+	return bootsource_str[src];
+}
+
 const char *bootsource_get_alias_stem(enum bootsource src)
 {
 	switch (src) {
@@ -107,12 +115,12 @@ void bootsource_set_alias_name(const char *name)
 
 void bootsource_set_raw(enum bootsource src, int instance)
 {
-	if (src >= ARRAY_SIZE(bootsource_str))
+	if (src >= BOOTSOURCE_MAX)
 		src = BOOTSOURCE_UNKNOWN;
 
 	bootsource = src;
 
-	setenv("bootsource", bootsource_str[src]);
+	setenv("bootsource", bootsource_to_string(src));
 
 	bootsource_set_raw_instance(instance);
 }
diff --git a/include/bootsource.h b/include/bootsource.h
index 9ca4fcc525b5..381776a85a4c 100644
--- a/include/bootsource.h
+++ b/include/bootsource.h
@@ -20,6 +20,7 @@ enum bootsource {
 	BOOTSOURCE_NET,
 	BOOTSOURCE_CAN,
 	BOOTSOURCE_JTAG,
+	BOOTSOURCE_MAX,
 };
 
 #define BOOTSOURCE_INSTANCE_UNKNOWN	-1
@@ -28,6 +29,7 @@ enum bootsource bootsource_get(void);
 int bootsource_get_instance(void);
 void bootsource_set_alias_name(const char *name);
 char *bootsource_get_alias_name(void);
+const char *bootsource_to_string(enum bootsource src);
 const char *bootsource_get_alias_stem(enum bootsource bs);
 int bootsource_of_alias_xlate(enum bootsource bs, int instance);
 
-- 
2.30.2