env: mmc: statically set the environment partition name
The new opt-out setting, CONFIG_ENV_MMC_PARTITION, statically sets
the MMC environment partition name. Prior to this patch, the only way
to declare this partition name was by creating a
'u-boot,mmc-env-partition' parameter in the device-tree's /config node.
This setting provides additional flexibility, particularly in cases
where accessing the device-tree is not straightforward (e.g. QEMU).
If undeclared, the device-tree's setting will be used.
Signed-off-by: Emmanuel Di Fede <emmanuel.difede@cysec.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Patrick Delaunay <patrick.delaunay@foss.st.com>
diff --git a/env/Kconfig b/env/Kconfig
index 7342397..13e3210 100644
--- a/env/Kconfig
+++ b/env/Kconfig
@@ -662,6 +662,18 @@
partition 0 or the first boot partition, which is 1 or some other defined
partition.
+config USE_ENV_MMC_PARTITION
+ bool "use the mmc environment partition name"
+ depends on ENV_IS_IN_MMC
+
+config ENV_MMC_PARTITION
+ string "mmc environment partition name"
+ depends on USE_ENV_MMC_PARTITION
+ help
+ MMC partition name used to save environment variables.
+ If this variable is unset, u-boot will try to get the env partition name
+ from the device-tree's /config node.
+
config ENV_MMC_USE_DT
bool "Read partition name and offset in DT"
depends on ENV_IS_IN_MMC && OF_CONTROL
diff --git a/env/mmc.c b/env/mmc.c
index 7a5836a..cb14bbb 100644
--- a/env/mmc.c
+++ b/env/mmc.c
@@ -114,8 +114,13 @@
if (IS_ENABLED(CONFIG_SYS_MMC_ENV_PART))
hwpart = mmc_get_env_part(mmc);
+#if defined(CONFIG_ENV_MMC_PARTITION)
+ str = CONFIG_ENV_MMC_PARTITION;
+#else
/* look for the partition in mmc CONFIG_SYS_MMC_ENV_DEV */
str = ofnode_conf_read_str(dt_prop.partition);
+#endif
+
if (str) {
/* try to place the environment at end of the partition */
err = mmc_offset_try_partition(str, copy, &val);