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f4742ca0fb
A negative value for the offset is treated as a backwards offset for
from the end of the device/partition for block devices. This aligns
the behavior of the config file with the syntax of CONFIG_ENV_OFFSET
where the functionality has been introduced with
commit 5c088ee841 ("env_mmc: allow negative CONFIG_ENV_OFFSET").
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
30 lines
1.1 KiB
Text
30 lines
1.1 KiB
Text
# Configuration file for fw_(printenv/setenv) utility.
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# Up to two entries are valid, in this case the redundant
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# environment sector is assumed present.
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# Notice, that the "Number of sectors" is not required on NOR and SPI-dataflash.
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# Futhermore, if the Flash sector size is omitted, this value is assumed to
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# be the same as the Environment size, which is valid for NOR and SPI-dataflash
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# Device offset must be prefixed with 0x to be parsed as a hexadecimal value.
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# NOR example
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# MTD device name Device offset Env. size Flash sector size Number of sectors
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/dev/mtd1 0x0000 0x4000 0x4000
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/dev/mtd2 0x0000 0x4000 0x4000
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# MTD SPI-dataflash example
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# MTD device name Device offset Env. size Flash sector size Number of sectors
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#/dev/mtd5 0x4200 0x4200
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#/dev/mtd6 0x4200 0x4200
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# NAND example
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#/dev/mtd0 0x4000 0x4000 0x20000 2
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# On a block device a negative offset is treated as a backwards offset from the
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# end of the device/partition, rather than a forwards offset from the start.
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# Block device example
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#/dev/mmcblk0 0xc0000 0x20000
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#/dev/mmcblk0 -0x20000 0x20000
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# VFAT example
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#/boot/uboot.env 0x0000 0x4000
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