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doc: dfu: describe eMMC partition number parameter

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In dfu_alt_info for eMMC the eMMC partition number can be specified.

The separator in dfu_alt_info is a semicolon not a comma.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Lukasz Majewski <lukma@denx.de>
This commit is contained in:
Heinrich Schuchardt 2020-05-23 11:36:49 +02:00 committed by Tom Rini
parent 51028db1ca
commit 378fc83ebd
1 changed files with 15 additions and 6 deletions
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doc/README.dfu
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@ -49,7 +49,7 @@ Configuration Options:
Environment variables:
the dfu command use 3 environments variables:
"dfu_alt_info" : the DFU setting for the USB download gadget with a comma
"dfu_alt_info" : the DFU setting for the USB download gadget with a semicolon
separated string of information on each alternate:
dfu_alt_info="<alt1>;<alt2>;....;<altN>"
@ -87,12 +87,21 @@ Commands:
"mmc" (for eMMC and SD card)
cmd: dfu 0 mmc <dev>
each element in "dfu_alt_info" =
<name> raw <offset> <size> raw access to mmc device
<name> part <dev> <part_id> raw acces to partition
<name> fat <dev> <part_id> file in FAT partition
<name> ext4 <dev> <part_id> file in EXT4 partition
<name> raw <offset> <size> [mmcpart <num>] raw access to mmc device
<name> part <dev> <part_id> [mmcpart <num>] raw access to partition
<name> fat <dev> <part_id> [mmcpart <num>] file in FAT partition
<name> ext4 <dev> <part_id> [mmcpart <num>] file in EXT4 partition
with <partid> is the GPT or DOS partition index
with <partid> being the GPT or DOS partition index,
with <num> being the eMMC hardware partition number.
A value of environment variable dfu_alt_info for eMMC could be:
"u-boot raw 0x3e 0x800 mmcpart 1;bl2 raw 0x1e 0x1d mmcpart 1"
A value of environment variable dfu_alt_info for SD card could be:
"u-boot raw 0x80 0x800;uImage ext4 0 2"
"nand" (raw slc nand device)
cmd: dfu 0 nand <dev>