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doc: boards: amlogic: update documentation for S400

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Improve documentation.

Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Link: https://lore.kernel.org/r/20230320114609.930145-25-christianshewitt@gmail.com
[narmstrong: fixed doc build]
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
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Christian Hewitt 2023-03-20 11:46:00 +00:00 committed by Neil Armstrong
parent 16fa2c4238
commit 1437ff3b95
1 changed files with 48 additions and 42 deletions
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36
doc/board/amlogic/s400.rst
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@ -1,12 +1,11 @@
.. SPDX-License-Identifier: GPL-2.0+
U-Boot for Amlogic S400
=======================
U-Boot for Amlogic S400 (A113X)
===============================
S400 is a reference board manufactured by Amlogic with the following
specifications:
S400 is a reference board manufactured by Amlogic with the following specifications:
- Amlogic A113DX ARM Cortex-A53 quad-core SoC @ 1.2GHz
- Amlogic A113X ARM Cortex-A53 quad-core SoC @ 1.2GHz
- 1GB DDR4 SDRAM
- 10/100 Ethernet
- 2x USB 2.0 Host
@ -19,7 +18,7 @@ specifications:
Schematics are available from Amlogic on demand.
U-Boot compilation
U-Boot Compilation
------------------
.. code-block:: bash
@ -28,14 +27,21 @@ U-Boot compilation
$ make s400_defconfig
$ make
Image creation
--------------
U-Boot Signing with Pre-Built FIP repo
--------------------------------------
For simplified usage, pleaser refer to :doc:`pre-generated-fip` with codename `s400`
.. code-block:: bash
Amlogic doesn't provide sources for the firmware and for tools needed
to create the bootloader image, so it is necessary to obtain them from
the git tree published by the board vendor:
$ git clone https://github.com/LibreELEC/amlogic-boot-fip --depth=1
$ cd amlogic-boot-fip
$ mkdir my-output-dir
$ ./build-fip.sh s400 /path/to/u-boot/u-boot.bin my-output-dir
U-Boot Manual Signing
---------------------
Amlogic does not provide sources for the firmware and tools needed to create a bootloader
image but sources have been shared by Linux development contractor, Baylibre:
.. code-block:: bash
@ -102,10 +108,10 @@ Go back to mainline U-boot source tree then :
--bl31 fip/bl31.img.enc \
--bl33 fip/bl33.bin.enc --level v3
and then write the image to SD with:
Then write U-Boot to SD or eMMC with:
.. code-block:: bash
$ DEV=/dev/your_sd_device
$ DEV=/dev/boot_device
$ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1
$ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=444
$ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=440