[PATCH 2/4] boot: add helper to set default boot source from board file

[Marco Felsch <m.felsch@pengutronix.de>]

Add a helper which can be called from board files to setup the
"boot.default" parameter to be independent of the initcall level.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
 common/boot.c  | 9 ++++++++-
 include/boot.h | 1 +
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/common/boot.c b/common/boot.c
index dd9e26afc769..9cf9e9f391fd 100644
--- a/common/boot.c
+++ b/common/boot.c
@@ -115,11 +115,18 @@ struct watchdog *boot_get_enabled_watchdog(void)
 }
 
 static char *global_boot_default;
+
+void boot_set_default(const char *boot_default)
+{
+	free(global_boot_default);
+	global_boot_default = xstrdup(boot_default);
+}
+
 static char *global_user;
 
 static int init_boot(void)
 {
-	global_boot_default = xstrdup("net");
+	global_boot_default = global_boot_default ? : xstrdup("net");
 	globalvar_add_simple_string("boot.default", &global_boot_default);
 	globalvar_add_simple_int("boot.watchdog_timeout",
 				 &boot_watchdog_timeout, "%u");
diff --git a/include/boot.h b/include/boot.h
index c9e8c0fd0d87..0f97901a9a72 100644
--- a/include/boot.h
+++ b/include/boot.h
@@ -44,6 +44,7 @@ int bootentry_register_provider(int (*fn)(struct bootentries *bootentries, const
 
 struct watchdog;
 
+void boot_set_default(const char *boot_default);
 void boot_set_watchdog_timeout(unsigned int timeout);
 struct watchdog *boot_get_enabled_watchdog(void);
 struct bootentries *bootentries_alloc(void);
-- 
2.39.2