env: enable accessing the environment in an EXT4 partition
For example to store the environment in a file named "/uboot.env" in MMC
"0", where partition "1" contains the EXT4 filesystem, the following
configs should be added to the board's default config:
CONFIG_ENV_IS_IN_EXT4=y
CONFIG_ENV_EXT4_DEVICE_AND_PART="0:1"
CONFIG_ENV_EXT4_FILE="/uboot.env"
CONFIG_ENV_EXT4_INTERFACE="mmc"
Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
[trini: Fix some line over 80 chars issues]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/env/Kconfig b/env/Kconfig
index bef6e89..692f863 100644
--- a/env/Kconfig
+++ b/env/Kconfig
@@ -81,6 +81,13 @@
- CONFIG_FAT_WRITE:
This must be enabled. Otherwise it cannot save the environment file.
+config ENV_IS_IN_EXT4
+ bool "Environment is in a EXT4 filesystem"
+ depends on !CHAIN_OF_TRUST
+ select EXT4_WRITE
+ help
+ Define this if you want to use the EXT4 file system for the environment.
+
config ENV_IS_IN_FLASH
bool "Environment in flash memory"
depends on !CHAIN_OF_TRUST
@@ -396,6 +403,38 @@
It's a string of the FAT file name. This file use to store the
environment.
+config ENV_EXT4_INTERFACE
+ string "Name of the block device for the environment"
+ depends on ENV_IS_IN_EXT4
+ help
+ Define this to a string that is the name of the block device.
+
+config ENV_EXT4_DEVICE_AND_PART
+ string "Device and partition for where to store the environemt in EXT4"
+ depends on ENV_IS_IN_EXT4
+ help
+ Define this to a string to specify the partition of the device. It can
+ be as following:
+
+ "D:P", "D:0", "D", "D:" or "D:auto" (D, P are integers. And P >= 1)
+ - "D:P": device D partition P. Error occurs if device D has no
+ partition table.
+ - "D:0": device D.
+ - "D" or "D:": device D partition 1 if device D has partition
+ table, or the whole device D if has no partition
+ table.
+ - "D:auto": first partition in device D with bootable flag set.
+ If none, first valid partition in device D. If no
+ partition table then means device D.
+
+config ENV_EXT4_FILE
+ string "Name of the EXT4 file to use for the environemnt"
+ depends on ENV_IS_IN_EXT4
+ default "uboot.env"
+ help
+ It's a string of the EXT4 file name. This file use to store the
+ environment (explicit path to the file)
+
if ARCH_SUNXI
config ENV_OFFSET