Commit graph

167 commits

Author SHA1 Message Date
Heinrich Schuchardt
9de4ec81c9 cmd: provide command to display SMBIOS information
U-Boot can either generated an SMBIOS table or copy it from a prior boot
stage, e.g. QEMU.

Provide a command to display the SMBIOS information.

Currently only type 1 and 2 are translated to human readable text.
Other types may be added later. Currently only a hexdump and the list of
strings is provided for these.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
2024-01-26 14:15:08 +01:00
Francis Laniel
9a06837731 cli: Enables using modern hush parser as command line parser
If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
2023-12-28 12:02:56 -05:00
Francis Laniel
6bb39f5d16 cmd: Add new cli command
This command can be used to print the current parser with 'cli get'.
It can also be used to set the current parser with 'cli set'.
For the moment, only one value is valid for set: old.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
2023-12-28 12:02:56 -05:00
Tom Rini
339d96822e Merge patch series "cmd: add scmi command"
To quote the author:

"Scmi" command will be re-introduced per Michal's request.
The functionality is the same as I put it in my patch set of adding
SCMI base protocol support, but made some tweak to make UT, "ut dm
scmi_cmd," more flexible and tolerable when enabling/disabling a specific
SCMI protocol for test purpose.

Each commit may have some change history inherited from the preceding
patch series.

Test
====
The patch series was tested on the following platforms:
* sandbox
2023-11-28 22:31:09 -05:00
AKASHI Takahiro
8055f90bd0 cmd: add scmi command for SCMI firmware
This command, "scmi", may provide a command line interface to various SCMI
protocols. It supports at least initially SCMI base protocol and is
intended mainly for debug purpose.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
2023-11-28 22:31:03 -05:00
Tom Rini
d972192520 env: Move env_set() out of cmd/nvedit.c and in to env/common.c
Inside of env/common.c we already have our helper env_set_xxx functions,
and even have a comment that explains why env_set() itself wasn't moved.
We now handle that move. This requires that we rename the previous
_do_env_set() to env_do_env_set() and note it as an internal env
function. Add comments about this function to explain why we do this
when we add the prototype. Add a new function, env_inc_id() to allow for
the counter to be updated by both commands and callers, and document
this as well by the prototype.

Signed-off-by: Tom Rini <trini@konsulko.com>
2023-11-07 14:48:19 -05:00
Johan Jonker
aacf214d0c rockchip: cmd: add rkmtd command
The command rkmtd creates a virtual block device to transfer
Rockchip boot block data to and from NAND with block orientated
tools like "ums" and "rockusb".

It uses the Rockchip MTD driver to scan for boot blocks and copies
data from the first block in a GPT formated virtual disk.
Data must be written in U-boot "idbloader.img" format and start at
partition "loader1" offset 64. The data header is parsed
for length and offset. When the last sector is received
it erases up to 5 erase blocks on NAND and writes bootblocks
in a pattern depending on the NAND ID. Data is then verified.
When a block turns out bad the block header is discarded.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2023-10-24 15:55:17 +08:00
Tom Rini
1b377a9ffe cmd/ti: Update Kconfig logic and Makefile recursion logic
- Add some dependencies to CMD_DDR3 as this is only valid on some
  platforms (which tend to select it as well).
- The proper gate for going in to cmd/ti is not
  CONFIG_TI_COMMON_CMD_OPTIONS as nothing under there is controlled by
  that symbol but the general TI architecture options.

Signed-off-by: Tom Rini <trini@konsulko.com>
2023-10-16 10:25:02 -04:00
Heinrich Schuchardt
8780cd8211 cmd: move mac command
Board specific implementations of the 'mac' command differ concerning the
supported sub-commands.

Move the Freescale specific mac command definition to the board code.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2023-10-16 10:22:11 -04:00
Simon Glass
33eb0b9eef cli: Add a command to show cmdline history
There is a function for this but it is never used. Showing the history is
a useful feature, so add a new 'history' command.

Signed-off-by: Simon Glass <sjg@chromium.org>
2023-10-11 15:43:54 -04:00
Abdellatif El Khlifi
f16a48fec9 arm_ffa: introduce armffa command
Provide armffa command showcasing the use of the U-Boot FF-A support

armffa is a command showcasing how to invoke FF-A operations.
This provides a guidance to the client developers on how to
call the FF-A bus interfaces. The command also allows to gather secure
partitions information and ping these  partitions. The command is also
helpful in testing the communication with secure partitions.

For more details please refer to the command documentation [1].

A Sandbox test is provided for the armffa command.

[1]: doc/usage/cmd/armffa.rst

Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Cc: Jens Wiklander <jens.wiklander@linaro.org>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
2023-08-08 10:22:03 -04:00
Tom Rini
94e7cb181a Revert "Merge branch '2023-07-24-introduce-FF-A-suppport'"
This reverts commit d927d1a808, reversing
changes made to c07ad9520c.

These changes do not pass CI currently.

Signed-off-by: Tom Rini <trini@konsulko.com>
2023-07-24 19:51:05 -04:00
Abdellatif El Khlifi
e785db9277 arm_ffa: introduce armffa command
Provide armffa command showcasing the use of the U-Boot FF-A support

armffa is a command showcasing how to invoke FF-A operations.
This provides a guidance to the client developers on how to
call the FF-A bus interfaces. The command also allows to gather secure
partitions information and ping these  partitions. The command is also
helpful in testing the communication with secure partitions.

For more details please refer to the command documentation [1].

[1]: doc/usage/cmd/armffa.rst

Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Cc: Jens Wiklander <jens.wiklander@linaro.org>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
2023-07-24 15:30:03 -04:00
Simon Glass
a0874dc4ac expo: Add a configuration editor
Add a new 'cedit' command which allows editing configuration using an
expo. The configuration items appear as menus on the display.

This is extremely basic, only supporting menus and not providing any way
to load or save the configuration.

Signed-off-by: Simon Glass <sjg@chromium.org>
2023-07-14 12:54:51 -04:00
Simon Glass
a554ee7ede cmd: Add 2048 game
Add the 2048 game, a good demo of ANSI sequences and a way to waste a
little time.

Bring it it from Barebox, modified for code style.

Signed-off-by: Simon Glass <sjg@chromium.org>
2023-04-06 19:10:08 -04:00
Tobias Waldekranz
bb56da117f cmd: blkmap: Add blkmap command
Add a frontend for the blkmap subsystem. In addition to the common
block device operations, this allows users to create and destroy
devices, and map in memory and slices of other block devices.

With that we support two primary use-cases:

- Being able to "distro boot" from a RAM disk. I.e., from an image
  where the kernel is stored in /boot of some filesystem supported
  by U-Boot.

- Accessing filesystems not located on exact partition boundaries,
  e.g. when a filesystem image is wrapped in an FIT image and stored
  in a disk partition.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2023-04-05 10:54:47 -04:00
Stephen Carlson
59b1c9be01 cmd: pci: Add command to set MPS of all PCIe devices
Enable tuning of the PCI Express MPS (Maximum Payload Size) of
each device. The Maximum Read Request Size is not altered.

The SAFE method uses the largest MPS value supported by all devices in the
system for each device. This method is the same algorithm as used by Linux
pci=pcie_bus_safe.

The PEER2PEER method sets all devices to the minimal (128 byte) MPS, which
allows hot plug of devices later that might only support the minimum size,
and ensures compatibility of DMA between two devices on the bus.

Signed-off-by: Stephen Carlson <stcarlso@linux.microsoft.com>
2023-03-30 15:09:59 -04:00
Simon Glass
1d32eee4fa efi: Support showing tables
Add a command (for the app and payload) to display the tables provided
by EFI. Note that for the payload the tables should always be present, so
an error message is unnecessary and would bloat the code.

Signed-off-by: Simon Glass <sjg@chromium.org>
2023-03-25 11:07:22 +01:00
Simon Glass
041840eeeb efi: Split out table-listing code into a new file
This code is used with EFI_LOADER but is also useful (with some
modifications) for the EFI app and payload. Move it into a shared
file.

Show the address of the table so it can be examined if needed. Also show
the table name as unknown if necessary. Our list of GUIDs is fairly
small.

Signed-off-by: Simon Glass <sjg@chromium.org>
2023-03-25 11:07:22 +01:00
Rasmus Villemoes
8311ac5fe0 cmd: introduce 'write' command
It's almost no extra code to hook up a buddy to the 'read' command. In
fact, since the command is passed its own 'struct cmd_tbl', we can use
the exact same callback, and let it figure out for itself whether it
was invoked as "read" or "write".

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
2023-03-17 15:44:01 -04:00
Dzmitry Sankouski
e7ee1fd567 video console: allow font size configuration at runtime
Allow font size configuration at runtime for console_simple.c
driver. This needed for unit testing different fonts.

Configuring is done by `font` command, also used for font
selection in true type console.

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2023-03-07 15:59:35 +01:00
Simon Glass
867552b51b Drop dataflash_mmc_mux command
This is not used. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
2023-02-07 14:33:48 -05:00
Simon Glass
f85a271cf3 cmd: Drop mfsl command
This is not used anywhere. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
2023-02-07 14:33:48 -05:00
Linus Walleij
41a29f284c cmd: Add a SEAMA image load command
Add a command to load SEAMA (Seattle Image), a NAND flash
on-flash storage format.

This type of flash image is found in some D-Link routers such
as DIR-645, DIR-842, DIR-859, DIR-860L, DIR-885L, DIR890L and
DCH-M225, as well as in WD and NEC routers on the ath79
(MIPS), Broadcom BCM53xx, and RAMIPS platforms.

This U-Boot command will read and decode a SEAMA image from
raw NAND flash on any platform. As it is always using big endian
format for the data decoding is always necessary on platforms
such as ARM.

The command is needed to read a SEAMA-encoded boot image on the
D-Link DIR-890L router for boot from NAND flash in an upcoming
port of U-Boot to the Broadcom Northstar (BCM4709, BCM53xx)
architecture.

A basic test and documentation is added as well. The test must
be run on a target with NAND flash support and at least one
resident SEAMA image in flash.

Cc: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2023-02-06 17:10:15 -05:00
Alexey Romanov
311106a1c6 arm/mach-meson: move smc commands in cmd/meson
It is incorrect to keep commands in the arch/ folder.

Signed-off-by: Alexey Romanov <avromanov@sberdevices.ru>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230110105650.54580-3-avromanov@sberdevices.ru
[narmstrong: moved after cmd/sound in index.rst]
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
2023-01-10 15:27:17 +01:00
Masahisa Kojima
c3b5af63d1 eficonfig: add UEFI Secure Boot Key enrollment interface
This commit adds the menu-driven UEFI Secure Boot Key
enrollment interface. User can enroll PK, KEK, db
and dbx by selecting file.
Only the signed EFI Signature List(s) with an authenticated
header, typically '.auth' file, is accepted.

To clear the PK, KEK, db and dbx, user needs to enroll the null key
signed by PK or KEK.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
2022-11-22 12:00:45 +01:00
Sughosh Ganu
e68c03be46 FWU: cmd: Add a command to read FWU metadata
Add a command to read the metadata as specified in the FWU
specification and print the fields of the metadata.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
2022-10-31 14:47:33 -04:00
Simon Glass
430e1676a7 video: Add commands to list and change fonts
Add a new 'font' command which allows the fonts to be listed as well as
selecting a different font and size.

Allow the test to run on sandbox, where multiple font/size combinations
are supported, as well as sandbox_flattree, where they are not.

Signed-off-by: Simon Glass <sjg@chromium.org>
2022-10-30 20:01:40 +01:00
Simon Glass
f029f90e7d video: Move the console commands to cmd/
Move these commands and the implementation to the cmd/ directory, which is
where most commands are kept.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
[agust: keep vidconsole_position_cursor() in vidconsole uclass]
Signed-off-by: Anatolij Gustschin <agust@denx.de>
2022-10-30 19:55:22 +01:00
Robert Marko
7f673bb8f5 cmd: add temperature command
Currently, there is no way for users to check the readings from thermal
sensors from U-boot console, only some boards print it during boot.

So, lets add a simple "temperature" command that allows listing thermal
uclass devices and getting their value.

Note that the thermal devices are intenionally probed if list is used as
almost always they will not get probed otherwise and there is no way for
users to manually call probe on a certain device from console.

Assumption is made that temperature is returned in degrees C and not
milidegrees like in Linux as this is what most drivers seem to return.

Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Reviewed-by: Simon Glass <sjg@chromium.org>
2022-10-11 15:40:48 -04:00
Roger Knecht
23c0df6e7c cmd: xxd: add new command
Add xxd command to print file content as hexdump to standard out

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Roger Knecht <rknecht@pm.me>
2022-10-11 15:40:48 -04:00
Roger Knecht
690a1d6948 cmd: cat: add new command
Add cat command to print file content to standard out

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Roger Knecht <rknecht@pm.me>
2022-10-11 15:40:48 -04:00
Simon Glass
003357cc48 cmd: Drop use of HAVE_BLOCK_DEVICE
This condition is not needed for these commands, since BLK is enabled for
all boards which use block devices and commands are not available in SPL,
so even if SPL_BLK is not enabled, it doesn't affect commands.

Signed-off-by: Simon Glass <sjg@chromium.org>
2022-09-16 11:05:00 -04:00
Tom Rini
1520af3f84 Pull request for efi next
UEFI:
 
 Implement a command eficonfig to maintain Load Options and boot order via
 menus.
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Merge tag 'efi-next-2022-09-14' of https://source.denx.de/u-boot/custodians/u-boot-efi into next

Pull request for efi next

UEFI:

Implement a command eficonfig to maintain Load Options and boot order via
menus.
2022-09-14 12:31:44 -04:00
Masahisa Kojima
87d791423a eficonfig: menu-driven addition of UEFI boot option
This commit add the "eficonfig" command.
The "eficonfig" command implements the menu-driven UEFI boot option
maintenance feature. This commit implements the addition of
new boot option. User can select the block device volume having
efi_simple_file_system_protocol and select the file corresponding
to the Boot#### variable. User can also enter the description and
optional_data of the BOOT#### variable in utf8.

This commit adds "include/efi_config.h", it contains the common
definition to be used from other menus such as UEFI Secure Boot
key management.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
2022-09-14 08:43:31 +02:00
Stefan Roese
1f865ee0ba cyclic: Add 'cyclic list' and 'cyclic demo' commands
This patch adds the cyclic command, which currently only supports the
'list' subcommand, to list all currently registered cyclic functions.
Here an example:

=> cyclic list
function: cyclic_demo, cpu-time: 7010 us, frequency: 99.80 times/s
function: cyclic_demo2, cpu-time: 1 us, frequency: 1.13 times/s

As you can see, the cpu-time is accounted, so that cyclic functions
that take too long might be discovered. Additionally the frequency is
logged.

The 'cyclic demo' commands registers the cyclic_demo() function to
be executed all 'cycletime_ms' milliseconds. The only thing this
function does is delaying by 'delay_us' microseconds.

Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2022-09-13 16:01:44 -04:00
Samuel Dionne-Riel
dc0d17c26a cmd: Add pause command
This command is being introduced with the goal of allowing user-friendly
"generic use case" U-Boot builds to pause until user input under some
situations.

The main use case would be when a boot failure happens, to pause until
the user has had time to acknowledge the current state.

Tested using:

    make && ./u-boot -v -T -c 'ut lib lib_test_hush_pause'

Signed-off-by: Samuel Dionne-Riel <samuel@dionne-riel.com>
Cc: Simon Glass <sjg@chromium.org>
2022-09-02 13:40:42 -04:00
Simon Glass
5fe76d460d vbe: Add a new vbe command
Add a command to look at VBE methods and their status. Provide a test for
all of this as well.

Signed-off-by: Simon Glass <sjg@chromium.org>
2022-08-12 08:17:11 -04:00
Simon Glass
7fca71d0d6 bootstd: Add a bootmeth command
Add a 'bootmeth' command to handle listing and ordering of boot methods.

Signed-off-by: Simon Glass <sjg@chromium.org>
2022-04-25 10:00:04 -04:00
Simon Glass
2d653f686b bootstd: Add a bootflow command
Add a 'bootflow' command to handle listing and selection of bootflow.

Signed-off-by: Simon Glass <sjg@chromium.org>
2022-04-25 10:00:04 -04:00
Simon Glass
5d053cca38 bootstd: Add a bootdev command
Add a 'bootdev' command to handle listing and selection of bootdevs.

Disable standard boot for a few boards which otherwise run out of space.

Signed-off-by: Simon Glass <sjg@chromium.org>
2022-04-25 10:00:04 -04:00
Huang Jianan
739941e11e fs/erofs: add filesystem commands
Add 'ls' and 'load' commands.

Signed-off-by: Huang Jianan <jnhuang95@gmail.com>
2022-03-15 16:19:29 -04:00
Simon Glass
c81b460c86 event: Add a command
Add a command to show the available events.

Signed-off-by: Simon Glass <sjg@chromium.org>
2022-03-10 08:28:36 -05:00
Ashok Reddy Soma
480245cf27 cmd: Add Kconfig option for multiprocessor cmds
Add Kconfig option(CONFIG_CMD_MP) to enable or disable multiprocessor
commands. Compile cmd/mp.c based on CONFIG_CMD_MP.

Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2022-01-24 10:35:10 -05:00
Ovidiu Panait
485c90c06b common: remove bedbug debugger support
Commit 98f705c9ce ("powerpc: remove 4xx support") removed (in 2017) the
last code that made use of bedbug debugger support. Since there aren't
any boards left that define either CONFIG_CMD_BEDBUG or a real
bedbug_init(), drop this feature from u-boot.

Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2022-01-18 08:31:02 -05:00
Simon Glass
25a326b006 efi: Support the efi command in the app
At present the 'efi' command only works in the EFI payload. Update it to
work in the app too, so the memory map can be examined.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-01-15 10:57:22 +01:00
Chris Morgan
fe3dde3e7b cmd: kaslrseed: add command to generate value from hwrng
Allow the kaslr-seed value in the chosen node to be set from a hardware
rng source.

Tested on a Rockchip PX30 (Odroid Go Advance), you must have loaded
the devicetree first and prepared it for editing. On my device the
workflow goes as follows:

setenv dtb_loadaddr "0x01f00000"
load mmc 0:1 ${dtb_loadaddr} rk3326-odroid-go2.dtb
fdt addr ${dtb_loadaddr}
fdt resize
kaslrseed

and the output can be seen here:
fdt print /chosen
chosen {
        kaslr-seed = <0x6f61df74 0x6f7b996c>;
        stdout-path = "serial2:115200n8";
};

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-12-24 10:54:56 +08:00
Simon Glass
262cfb5b15 pxe: Move pxe_utils files
Move the header file into the main include/ directory so we can use it
from the bootmethod code. Move the C file into boot/ since it relates to
booting.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Artem Lapkin <email2tema@gmail.com>
Tested-by: Artem Lapkin <email2tema@gmail.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
2021-11-11 19:02:21 -05:00
Roland Gaudig
f4f8d8bb1a cmd: setexpr: add format string handling
Add format string handling operator to the setexpr command.
It allows to use C or Bash like format string expressions to be
evaluated with the result being stored inside the environment variable
name.

  setexpr <name> fmt <format> [value]...

The following example

  setexpr foo fmt "%d, 0x%x" 0x100 ff

will result in $foo being set to "256, 0xff".

Signed-off-by: Roland Gaudig <roland.gaudig@weidmueller.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-07-27 14:50:47 -04:00
Kory Maincent
2f84e9cf06 cmd: add support for a new "extension" command
This patch adds a new "extension" command, which aims at detecting
extension boards connected to the hardware platform, and apply the
Device Tree overlays that describe the hardware present on those
extension boards.

In order to enable this mechanism, board-specific code must implement
the extension_board_scan() function that fills in a linked list of
"struct extension", each describing one extension board. In addition,
the board-specific code must select the SUPPORT_EXTENSION_SCAN Kconfig
boolean.

Based on this:

 - "extension scan" makes the generic code call the board-specific
   extension_board_scan() function to retrieve the list of detected
   extension boards.

 - "extension list" allows to list the detected extension boards.

 - "extension apply <number>|all" allows to apply the Device Tree
   overlay(s) corresponding to one, or all, extension boards

The latter requires two environment variables to exist and set one variable
to run:

 - extension_overlay_addr: the RAM address where to load the Device
   Tree overlays

 - extension_overlay_cmd: the U-Boot command to load one overlay.
   Indeed, the location and mechanism to load DT overlays is very setup
   specific.

 - extension_overlay_name: set by the command: the name of the DT which
   will be load during the execution.

When calling the command described in the extension_overlay_cmd
variable, the variable extension_overlay_name will be defined. So a
typical extension_overlay_cmd will look like this:

  extension_overlay_cmd=load mmc 0:1 $extension_overlay_addr /boot/$extension_overlay_name

Here is an example on how to use it:
=> run loadfdt
=> fdt addr $fdtaddr
=> setenv extension_overlay_addr 0x1000
=> setenv extension_overlay_cmd 'load mmc 0:1 ${extension_overlay_addr} /boot/${extension_overlay_name}'
=> extension scan
Found 1 extension board(s).
=> extension apply 0
519 bytes read in 3 ms (168.9 KiB/s)

Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
Reviewed-by: Maxime Ripard <maxime@cerno.tech>
2021-05-13 13:09:05 -04:00