forked from OERV-BSP/u-boot
38f60e1621
This explains how to use the new U-Boot command 'dmareset'. Signed-off-by: Brian Sune <briansune@gmail.com> Reviewed-by: Tom Rini <trini@konsulko.com>
56 lines
1.0 KiB
ReStructuredText
56 lines
1.0 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
.. index::
|
|
single: dmareset (command)
|
|
|
|
dmareset command
|
|
================
|
|
|
|
Synopsis
|
|
--------
|
|
|
|
::
|
|
|
|
Usage: dmareset <channel 0-7> [<channel 0-7> ...]
|
|
dmareset - Release PL330 DMA channel reset(s) for SoCFPGA
|
|
|
|
Usage:
|
|
dmareset <channel 0-7> [<channel 0-7> ...] - release reset for one or more DMA channels
|
|
|
|
Description
|
|
-----------
|
|
|
|
Release the DMA channel reset *channel*.
|
|
|
|
Parameters
|
|
----------
|
|
|
|
channel
|
|
DMA channel number
|
|
|
|
Example
|
|
-------
|
|
|
|
Release DMA channel(s)::
|
|
|
|
=> dmareset 0
|
|
PL330 DMA channel 0 reset released
|
|
=> dmareset 1
|
|
PL330 DMA channel 1 reset released
|
|
=> dmareset 0 1
|
|
PL330 DMA channel 0 reset released
|
|
PL330 DMA channel 1 reset released
|
|
|
|
|
|
Configuration
|
|
-------------
|
|
|
|
The dmareset command is only available if CONFIG_CMD_C5_PL330_DMA=y in
|
|
"Shell scripting commands".
|
|
|
|
Return value
|
|
------------
|
|
|
|
If the command succeeds, the return value $? is set to 0 (true).
|
|
If an error occurs, the return value $? is set to 1 (false).
|