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.dif...@cysec.com>
Cc: Joe Hershberger <joe.hershber...@ni.com>
Cc: Patrick Delaunay <patrick.delau...@foss.st.com>
---
doc/device-tree-bindings/config.txt | 2 ++
env/Kconfig | 8 ++++++++
env/mmc.c | 9 +++++++--
3 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/doc/device-tree-bindings/config.txt
b/doc/device-tree-bindings/config.txt
index 3151778b2c..f50c68bbdc 100644
--- a/doc/device-tree-bindings/config.txt
+++ b/doc/device-tree-bindings/config.txt
@@ -76,6 +76,8 @@ u-boot,mmc-env-partition (int)
precedence. In that case, only if the partition is not found,
mmc-env-offset* will be tried.
+ Note that CONFIG_ENV_MMC_PARTITION overrides this device-tree setting.
+
u-boot,no-apm-finalize (bool)
For x86 devices running on coreboot, this tells U-Boot not to lock
down the Intel Management Engine (ME) registers. This allows U-Boot to
diff --git a/env/Kconfig b/env/Kconfig
index 2bbe4c466a..de38b00bd1 100644
--- a/env/Kconfig
+++ b/env/Kconfig
@@ -659,6 +659,14 @@ config SYS_MMC_ENV_PART
partition 0 or the first boot partition, which is 1 or some other
defined
partition.
+config ENV_MMC_PARTITION
+ string "mmc environment partition name"
+ depends on ENV_IS_IN_MMC
+ 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 DTB'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 7a5836ad66..887df61fbe 100644
--- a/env/mmc.c
+++ b/env/mmc.c
@@ -114,8 +114,13 @@ static inline s64 mmc_offset(struct mmc *mmc, int copy)
if (IS_ENABLED(CONFIG_SYS_MMC_ENV_PART))
hwpart = mmc_get_env_part(mmc);
- /* look for the partition in mmc CONFIG_SYS_MMC_ENV_DEV */
- str = ofnode_conf_read_str(dt_prop.partition);
+ if (IS_ENABLED(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);
+ }
+
if (str) {
/* try to place the environment at end of the partition */
err = mmc_offset_try_partition(str, copy, &val);
--
2.41.0
