board: dhelectronics: Sync env variable dh_som_serial_number with SN

The env variable "SN" is used to store the serial number on DH electronics
SoMs. New SoMs will use the variable "dh_som_serial_number". To ensure
compatibility, these env variables are synchronized. This is achieved
using callback functions.

Signed-off-by: Christoph Niedermaier <[email protected]>
Reviewed-by: Marek Vasut <[email protected]>

1 files changed, 17 insertions, 0 deletions

diff --git a/board/dhelectronics/common/dh_common.c b/board/dhelectronics/common/dh_common.c
index 6a942909ccf..71010803f55 100644
--- a/board/dhelectronics/common/dh_common.c
+++ b/board/dhelectronics/common/dh_common.c
@@ -11,6 +11,23 @@
 
 #include "dh_common.h"
 
+static int on_dh_som_serial_number(const char *name, const char *value, enum env_op op,
+				   int flags)
+{
+	env_set("SN", value);
+	return 0;
+}
+
+U_BOOT_ENV_CALLBACK(dh_som_serial_number, on_dh_som_serial_number);
+
+static int on_SN(const char *name, const char *value, enum env_op op, int flags)
+{
+	env_set("dh_som_serial_number", value);
+	return 0;
+}
+
+U_BOOT_ENV_CALLBACK(SN, on_SN);
+
 bool dh_mac_is_in_env(const char *env)
 {
 	unsigned char enetaddr[6];