[PATCH 08/10] bootsource: add support for bootsource instance information

[Marc Kleine-Budde <mkl@pengutronix.de>]

Add a C interface to set and get the bootsource instance:

    int bootsource_get_instance(void);
    void bootsource_set_instance(int instance);

Also export the shell variable "barebox_loc_instance".

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 common/bootsource.c  | 20 ++++++++++++++++++++
 include/bootsource.h |  2 ++
 2 files changed, 22 insertions(+)

diff --git a/common/bootsource.c b/common/bootsource.c
index ebe4407..fae554d 100644
--- a/common/bootsource.c
+++ b/common/bootsource.c
@@ -34,6 +34,7 @@ static const char *bootsource_str[] = {
 };
 
 static enum bootsource bootsource = BOOTSOURCE_UNKNOWN;
+static int bootsource_instance = 0;
 
 void bootsource_set(enum bootsource src)
 {
@@ -45,6 +46,16 @@ void bootsource_set(enum bootsource src)
 	setenv("barebox_loc", bootsource_str[src]);
 }
 
+void bootsource_set_instance(int instance)
+{
+	char buf[32];
+
+	bootsource_instance = instance;
+	snprintf(buf, sizeof(buf), "%d", instance);
+
+	setenv("barebox_loc_instance", buf);
+}
+
 enum bootsource bootsource_get(void)
 {
 	return bootsource;
@@ -52,10 +63,19 @@ enum bootsource bootsource_get(void)
 
 BAREBOX_MAGICVAR(barebox_loc, "The source barebox has been booted from");
 
+int bootsource_get_instance(void)
+{
+	return bootsource_instance;
+}
+
+BAREBOX_MAGICVAR(barebox_loc_instance, "The instance of the source barebox has been booted from");
+
 static int bootsource_init(void)
 {
 	bootsource_set(bootsource);
+	bootsource_set_instance(bootsource_instance);
 	export("barebox_loc");
+	export("barebox_loc_instance");
 
 	return 0;
 }
diff --git a/include/bootsource.h b/include/bootsource.h
index ecd5938..dfcad49 100644
--- a/include/bootsource.h
+++ b/include/bootsource.h
@@ -14,6 +14,8 @@ enum bootsource {
 };
 
 enum bootsource bootsource_get(void);
+int bootsource_get_instance(void);
 void bootsource_set(enum bootsource src);
+void bootsource_set_instance(int instance);
 
 #endif	/* __BOOTSOURCE_H__ */
-- 
1.8.2.rc2


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