doc: boards: amlogic: update for Radxa Zero
Add documentation bits for the Radxa Zero
Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
[narmstrong: updated u200 MAINTAINERS]
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/board/amlogic/u200/MAINTAINERS b/board/amlogic/u200/MAINTAINERS
index 73c73b1..a259d12 100644
--- a/board/amlogic/u200/MAINTAINERS
+++ b/board/amlogic/u200/MAINTAINERS
@@ -7,3 +7,4 @@
F: configs/bananapi-m5_defconfig
F: configs/radxa-zero_defconfig
F: doc/board/amlogic/u200.rst
+F: doc/board/amlogic/radxa-zero.rst
diff --git a/doc/board/amlogic/index.rst b/doc/board/amlogic/index.rst
index c18f1b7..189b1ef 100644
--- a/doc/board/amlogic/index.rst
+++ b/doc/board/amlogic/index.rst
@@ -17,7 +17,7 @@
+===============================+===========+=================+==============+=============+============+=============+==============+
| Boards | Odroid-C2 | P212 | Khadas VIM2 | S400 | U200 | Odroid-N2 | SEI610 |
| | Nanopi-K2 | Khadas-VIM | Libretech-PC | JetHub J100 | SEI510 | Khadas-VIM3 | Khadas-VIM3L |
-| | P200 | LibreTech-CC v1 | WeTek Core2 | | | GT-King/Pro | Odroid-C4 |
+| | P200 | LibreTech-CC v1 | WeTek Core2 | | Radxa Zero | GT-King/Pro | Odroid-C4 |
| | P201 | LibreTech-AC v2 | | | | GSKing-X | Odroid-HC4 |
| | | JetHub J80 | | | | | BananaPi-M5 |
+-------------------------------+-----------+-----------------+--------------+-------------+------------+-------------+--------------+
@@ -98,6 +98,7 @@
p201
p212
q200
+ radxa-zero
s400
sei510
sei610
diff --git a/doc/board/amlogic/radxa-zero.rst b/doc/board/amlogic/radxa-zero.rst
new file mode 100644
index 0000000..423403f
--- /dev/null
+++ b/doc/board/amlogic/radxa-zero.rst
@@ -0,0 +1,74 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+U-Boot for Radxa Zero
+=====================
+
+Radxa Zero is a small form factor SBC based on the Amlogic S905Y2
+chipset that ships in a number of RAM/eMMC configurations:
+
+Boards with 512MB/1GB LPDDR4 RAM have no eMMC storage and BCM43436
+wireless (2.4GHz b/g/n) while 2GB/4GB boards have 8/16/32/64/128GB
+eMMC storage and BCM4345 wireless (2.4/5GHz a/b/g/n/ac).
+
+- Amlogic S905Y2 quad-core Cortex-A53
+- Mali G31-MP2 GPU
+- HDMI 2.1 output (micro)
+- 1x USB 2.0 port - Type C (OTG)
+- 1x USB 3.0 port - Type C (Host)
+- 1x micro SD Card slot
+- 40 Pin GPIO header
+
+Schematics are available on the manufacturer website:
+
+https://dl.radxa.com/zero/docs/hw/RADAX_ZERO_V13_SCH_20210309.pdf
+
+U-Boot compilation
+------------------
+
+.. code-block:: bash
+
+ $ export CROSS_COMPILE=aarch64-none-elf-
+ $ make radxa-zero_defconfig
+ $ make
+
+Image creation
+--------------
+
+Amlogic does not provide sources for the firmware and for tools needed
+to create the bootloader image, so it is necessary to obtain them from
+git trees published by the board vendor:
+
+.. code-block:: bash
+
+ $ git clone -b radxa-zero-v2021.07 https://github.com/radxa/u-boot.git
+ $ git clone https://github.com/radxa/fip.git
+
+ $ sudo apt-get install -y gcc-aarch64-linux-gnu device-tree-compiler libncurses5 libncurses5-dev
+ $ sudo apt-get install -y bc python dosfstools flex build-essential libssl-dev mtools
+
+ $ wget https://developer.arm.com/-/media/Files/downloads/gnu-a/10.3-2021.07/binrel/gcc-arm-10.3-2021.07-x86_64-aarch64-none-elf.tar.xz
+ $ sudo tar xvf gcc-arm-10.3-2021.07-x86_64-aarch64-none-elf.tar.xz -C /opt
+
+ $ export CROSS_COMPILE=/opt/gcc-arm-10.2-2020.11-x86_64-aarch64-none-elf/bin/aarch64-none-elf-
+ $ export ARCH=arm
+ $ cd u-boot
+ $ make radxa-zero_defconfig
+ $ make
+
+ $ cp u-boot.bin ../fip/radxa-zero/bl33.bin
+ $ cd ../fip/radxa-zero
+ $ make
+
+This will generate:
+
+.. code-block:: bash
+
+ $ u-boot.bin u-boot.bin.sd.bin u-boot.bin.usb.bl2 u-boot.bin.usb.tpl
+
+Then write the image to SD with:
+
+.. code-block:: bash
+
+ $ DEV=/dev/your_sd_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