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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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doc/board/amlogic/s400.rst
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@ -1,15 +1,14 @@
.. SPDX-License-Identifier: GPL-2.0+ .. 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 S400 is a reference board manufactured by Amlogic with the following specifications:
specifications:
- Amlogic A113DX ARM Cortex-A53 quad-core SoC @ 1.2GHz - Amlogic A113X ARM Cortex-A53 quad-core SoC @ 1.2GHz
- 1GB DDR4 SDRAM - 1GB DDR4 SDRAM
- 10/100 Ethernet - 10/100 Ethernet
- 2 x USB 2.0 Host - 2x USB 2.0 Host
- eMMC - eMMC
- Infrared receiver - Infrared receiver
- SDIO WiFi Module - SDIO WiFi Module
@ -19,7 +18,7 @@ specifications:
Schematics are available from Amlogic on demand. Schematics are available from Amlogic on demand.
U-Boot compilation U-Boot Compilation
------------------ ------------------
.. code-block:: bash .. code-block:: bash
@ -28,14 +27,21 @@ U-Boot compilation
$ make s400_defconfig $ make s400_defconfig
$ make $ 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 $ git clone https://github.com/LibreELEC/amlogic-boot-fip --depth=1
to create the bootloader image, so it is necessary to obtain them from $ cd amlogic-boot-fip
the git tree published by the board vendor: $ 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 .. code-block:: bash
@ -102,10 +108,10 @@ Go back to mainline U-boot source tree then :
--bl31 fip/bl31.img.enc \ --bl31 fip/bl31.img.enc \
--bl33 fip/bl33.bin.enc --level v3 --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 .. 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=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