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env/ext4.c: allow loading from an EXT4 partition on the MMC boot device

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This parallels what I added for FAT in commit 6731bef696, allowing the
environment to be found in a specific partition on the device that the
board's mmc_get_env_dev() returns. On the Banana Pi R2 that means the
device that U-Boot was loaded from; either the internal eMMC or an SD
card.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
David Woodhouse
2020-08-04 10:05:47 +01:00
committed by Tom Rini
parent 4dee3f7851
commit b0493bb75a
2 changed files with 18 additions and 0 deletions
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4
env/Kconfig vendored
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@@ -477,6 +477,10 @@ config ENV_EXT4_DEVICE_AND_PART
If none, first valid partition in device D. If no
partition table then means device D.
If ENV_EXT4_INTERFACE is set to "mmc" then device 'D' can be omitted,
leaving the string starting with a colon, and the boot device will
be used.
config ENV_EXT4_FILE
string "Name of the EXT4 file to use for the environment"
depends on ENV_IS_IN_EXT4