[U-Boot] [RFC PATCH v2 3/5] env: Add a bootfile env handler

[Joe Hershberger]

Remove the hard-coded bootfile handler and use a callback instead

Signed-off-by: Joe Hershberger <joe.hershberger at ni.com>
---

 common/cmd_nvedit.c    | 13 -------------
 include/env_callback.h |  2 +-
 net/net.c              | 16 ++++++++++++++++
 3 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index 9e8ea12..ac15a3c 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -50,9 +50,6 @@
 #include <serial.h>
 #include <linux/stddef.h>
 #include <asm/byteorder.h>
-#if defined(CONFIG_CMD_NET)
-#include <net.h>
-#endif
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -333,16 +330,6 @@ int _do_env_set(int flag, int argc, char * const argv[])
 		return 1;
 	}
 
-	/*
-	 * Some variables should be updated when the corresponding
-	 * entry in the environment is changed
-	 */
-#if defined(CONFIG_CMD_NET)
-	if (strcmp(argv[1], "bootfile") == 0) {
-		copy_filename(BootFile, argv[2], sizeof(BootFile));
-		return 0;
-	}
-#endif
 	return 0;
 }
 
diff --git a/include/env_callback.h b/include/env_callback.h
index 9c1cbe9..b450077 100644
--- a/include/env_callback.h
+++ b/include/env_callback.h
@@ -36,7 +36,7 @@
  * a new assogiation in the ".callbacks" environment variable.
  */
 #define ENV_CALLBACK_LIST_STATIC ENV_CALLBACK_VAR ":callbacks," \
-	"loadaddr:loadaddr," \
+	"loadaddr:loadaddr,bootfile:bootfile," \
 	CONFIG_ENV_CALLBACK_LIST_STATIC
 
 enum env_op {
diff --git a/net/net.c b/net/net.c
index e8ff066..7d7196f 100644
--- a/net/net.c
+++ b/net/net.c
@@ -82,6 +82,7 @@
 
 #include <common.h>
 #include <command.h>
+#include <environment.h>
 #include <net.h>
 #if defined(CONFIG_STATUS_LED)
 #include <miiphy.h>
@@ -208,6 +209,21 @@ static int NetTryCount;
 
 /**********************************************************************/
 
+static int on_bootfile(const char *name, const char *value, enum env_op op)
+{
+	switch (op) {
+	case env_op_create:
+	case env_op_overwrite:
+		copy_filename(BootFile, value, sizeof(BootFile));
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+U_BOOT_ENV_CALLBACK(bootfile, on_bootfile);
+
 /*
  * Check if autoload is enabled. If so, use either NFS or TFTP to download
  * the boot file.
-- 
1.7.11.5