mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2025-12-19 16:31:27 +01:00
3cb97f9293
* Avoid two step navigation to get to the description of the write command. * Add missing index entries * Correct formatting of the examples. * Describe configuration and return value. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
47 lines
1.1 KiB
ReStructuredText
47 lines
1.1 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
.. index::
|
|
single: write (command)
|
|
|
|
write command
|
|
=============
|
|
|
|
Synopsis
|
|
--------
|
|
|
|
::
|
|
|
|
write <interface> <dev[:part|#partname]> <addr> <blk#> <cnt>
|
|
|
|
Description
|
|
-----------
|
|
|
|
The write command can be used for raw writing data to a block device
|
|
(or partition therein), i.e. without going through a file system.
|
|
|
|
The block device is specified using the <interface> (e.g. "mmc") and
|
|
<dev> parameters. If the block device has a partition table, one can
|
|
optionally specify a partition number (using the :part syntax) or
|
|
partition name (using the #partname syntax). The command then reads
|
|
the <cnt> blocks of data starting at block number <blk#> of the given
|
|
device/partition to the memory address <addr>.
|
|
|
|
Examples
|
|
--------
|
|
|
|
.. code-block:: bash
|
|
|
|
# Write to the third sector of the partition named 'bootdata' of mmc device 0
|
|
write mmc 0#bootdata $loadaddr 2 1
|
|
|
|
Configuration
|
|
-------------
|
|
|
|
The write command is only available if CONFIG_CMD_WRITE=y.
|
|
|
|
Return value
|
|
------------
|
|
|
|
The command sets the return value $? to 0 (true) on success and to 1 (false) in
|
|
case of an error.
|