The board revision can be a useful env var, like its serial number.
Signed-off-by: Benoît Thébaudeau <benoit.thebaud...@advansee.com>
Cc: Wolfgang Denk <w...@denx.de>
---
{u-boot-4d3c95f.orig => u-boot-4d3c95f}/README | 21 ++++++++++----------
.../common/cmd_nvedit.c | 5 +++--
.../tools/env/fw_env.c | 5 +++--
3 files changed, 17 insertions(+), 14 deletions(-)
diff --git u-boot-4d3c95f.orig/README u-boot-4d3c95f/README
index 369ea9c..2ea48cf 100644
--- u-boot-4d3c95f.orig/README
+++ u-boot-4d3c95f/README
@@ -2073,13 +2073,13 @@ The following options need to be configured:
- Vendor Parameter Protection:
U-Boot considers the values of the environment
- variables "serial#" (Board Serial Number) and
- "ethaddr" (Ethernet Address) to be parameters that
- are set once by the board vendor / manufacturer, and
- protects these variables from casual modification by
- the user. Once set, these variables are read-only,
- and write or delete attempts are rejected. You can
- change this behaviour:
+ variables "serial#" (Board Serial Number), "rev"
+ (Board Revision) and "ethaddr" (Ethernet Address)
+ to be parameters that are set once by the board
+ vendor / manufacturer, and protects these variables
+ from casual modification by the user. Once set,
+ these variables are read-only, and write or delete
+ attempts are rejected. You can change this behaviour:
If CONFIG_ENV_OVERWRITE is #defined in your config
file, the write protection for vendor parameters is
@@ -2090,8 +2090,8 @@ The following options need to be configured:
_and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default
Ethernet address is installed in the environment,
which can be changed exactly ONCE by the user. [The
- serial# is unaffected by this, i. e. it remains
- read-only.]
+ serial# and rev are unaffected by this, i. e. they
+ remain read-only.]
- Protected RAM:
CONFIG_PRAM
@@ -3968,10 +3968,11 @@ depending the information provided by your boot server:
serverip - see above
-There are two special Environment Variables:
+There are three special Environment Variables:
serial# - contains hardware identification information such
as type string and/or serial number
+ rev - hardware revision
ethaddr - Ethernet address
These variables can be set only once (usually during manufacturing of
diff --git u-boot-4d3c95f.orig/common/cmd_nvedit.c
u-boot-4d3c95f/common/cmd_nvedit.c
index 0f320cc..d16aeb6 100644
--- u-boot-4d3c95f.orig/common/cmd_nvedit.c
+++ u-boot-4d3c95f/common/cmd_nvedit.c
@@ -255,12 +255,13 @@ int _do_env_set(int flag, int argc, char * const argv[])
}
/*
- * Some variables like "ethaddr" and "serial#" can be set only
- * once and cannot be deleted; also, "ver" is readonly.
+ * Some variables like "ethaddr", "serial#" and "rev" can be set only
+ * once and cannot be deleted.
*/
if (ep) { /* variable exists */
#ifndef CONFIG_ENV_OVERWRITE
if (strcmp(name, "serial#") == 0 ||
+ strcmp(name, "rev") == 0 ||
(strcmp(name, "ethaddr") == 0
#if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
&& strcmp(ep->data, MK_STR(CONFIG_ETHADDR)) != 0
diff --git u-boot-4d3c95f.orig/tools/env/fw_env.c
u-boot-4d3c95f/tools/env/fw_env.c
index 1a2c227..b5aa3aa 100644
--- u-boot-4d3c95f.orig/tools/env/fw_env.c
+++ u-boot-4d3c95f/tools/env/fw_env.c
@@ -405,10 +405,11 @@ int fw_env_write(char *name, char *value)
if (oldval) {
#ifndef CONFIG_ENV_OVERWRITE
/*
- * Ethernet Address and serial# can be set only once
+ * Ethernet Address, serial# and rev can be set only once
*/
if (
(strcmp(name, "serial#") == 0) ||
+ (strcmp (name, "rev") == 0) ||
((strcmp(name, "ethaddr") == 0)
#if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
&& (strcmp(oldval, MK_STR(CONFIG_ETHADDR)) != 0)
@@ -474,7 +475,7 @@ int fw_env_write(char *name, char *value)
* Deletes or sets environment variables. Returns -1 and sets errno error
codes:
* 0 - OK
* EINVAL - need at least 1 argument
- * EROFS - certain variables ("ethaddr", "serial#") cannot be
+ * EROFS - certain variables ("ethaddr", "serial#", "rev") cannot be
* modified or deleted
*
*/
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