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doc: boards: amlogic: update documentation for JetHub J80

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Improve documentation.

Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Link: https://lore.kernel.org/r/20230320114609.930145-8-christianshewitt@gmail.com
[narmstrong: fixed doc build]
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
This commit is contained in:
Christian Hewitt
2023-03-20 11:45:43 +00:00
committed by Neil Armstrong
parent 430a94db7d
commit 042048dc8d
1 changed files with 27 additions and 20 deletions
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47
doc/board/amlogic/jethub-j80.rst
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@@ -1,10 +1,10 @@
.. SPDX-License-Identifier: GPL-2.0+
U-Boot for JetHub J80
======================
U-Boot for JetHub J80 (S905W)
=============================
JetHome Jethub H1 (http://jethome.ru/jethub-h1) is a home automation
controller manufactured by JetHome with the following specifications:
JetHome Jethub H1 (http://jethome.ru/jethub-h1) is a home automation controller device
manufactured by JetHome with the following specifications:
- Amlogic S905W (ARM Cortex-A53) quad-core up to 1.5GHz
- No video out
@@ -21,7 +21,7 @@ controller manufactured by JetHome with the following specifications:
- DC source 5V microUSB
- Square plastic case
U-Boot compilation
U-Boot Compilation
------------------
.. code-block:: bash
@@ -30,14 +30,21 @@ U-Boot compilation
$ make jethub_j80_defconfig
$ make
Image creation
--------------
U-Boot Signing with Pre-Built FIP repo
--------------------------------------
For simplified usage, pleaser refer to :doc:`pre-generated-fip` with codename `jethub-j80`
.. 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 binaries
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 jethub-j80 /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 so it is necessary to obtain binaries from sources published by the board vendor:
.. code-block:: bash
@@ -45,7 +52,7 @@ from the git tree published by the board vendor:
$ cd jethub-u-boot
$ export FIPDIR=$PWD
Go back to mainline U-Boot source tree then :
Go back to the mainline U-Boot source tree then:
.. code-block:: bash
@@ -84,16 +91,16 @@ Go back to mainline U-Boot source tree then :
$ $FIPDIR/j80/aml_encrypt_gxl --bl3enc --input fip/bl33.bin --compress lz4
$ $FIPDIR/j80/aml_encrypt_gxl --bl2sig --input fip/bl2_new.bin --output fip/bl2.n.bin.sig
$ $FIPDIR/j80/aml_encrypt_gxl --bootmk \
--output fip/u-boot.bin \
--bl2 fip/bl2.n.bin.sig \
--bl30 fip/bl30_new.bin.enc \
--bl31 fip/bl31.img.enc \
--bl33 fip/bl33.bin.enc
--output fip/u-boot.bin \
--bl2 fip/bl2.n.bin.sig \
--bl30 fip/bl30_new.bin.enc \
--bl31 fip/bl31.img.enc \
--bl33 fip/bl33.bin.enc
and then write the image to SD/eMMC 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