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 <cniedermaier@dh-electronics.com>
Reviewed-by: Marek Vasut <marex@denx.de>

diff --git a/board/dhelectronics/common/dh_common.c b/board/dhelectronics/common/dh_common.c
index 6a94290..7101080 100644 (file)
--- 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];

diff --git a/configs/dhsom.config b/configs/dhsom.config
index fc76632..380beda 100644 (file)
--- a/configs/dhsom.config
+++ b/configs/dhsom.config
@@ -49,6 +49,7 @@ CONFIG_CMD_UUID=y
 CONFIG_CMD_WGET=y
 CONFIG_CMD_XXD=y
 CONFIG_CRC32_VERIFY=y
+CONFIG_ENV_CALLBACK_LIST_STATIC="dh_som_serial_number:dh_som_serial_number,SN:SN,"
 CONFIG_HASH_VERIFY=y
 CONFIG_MD5SUM_VERIFY=y
 CONFIG_SHA1SUM_VERIFY=y