mirror of
https://github.com/AsahiLinux/u-boot
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75 lines
2.2 KiB
ReStructuredText
75 lines
2.2 KiB
ReStructuredText
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.. SPDX-License-Identifier: GPL-2.0+
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U-Boot for Radxa Zero
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=====================
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Radxa Zero is a small form factor SBC based on the Amlogic S905Y2
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chipset that ships in a number of RAM/eMMC configurations:
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Boards with 512MB/1GB LPDDR4 RAM have no eMMC storage and BCM43436
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wireless (2.4GHz b/g/n) while 2GB/4GB boards have 8/16/32/64/128GB
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eMMC storage and BCM4345 wireless (2.4/5GHz a/b/g/n/ac).
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- Amlogic S905Y2 quad-core Cortex-A53
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- Mali G31-MP2 GPU
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- HDMI 2.1 output (micro)
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- 1x USB 2.0 port - Type C (OTG)
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- 1x USB 3.0 port - Type C (Host)
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- 1x micro SD Card slot
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- 40 Pin GPIO header
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Schematics are available on the manufacturer website:
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https://dl.radxa.com/zero/docs/hw/RADAX_ZERO_V13_SCH_20210309.pdf
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U-Boot compilation
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------------------
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.. code-block:: bash
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$ export CROSS_COMPILE=aarch64-none-elf-
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$ make radxa-zero_defconfig
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$ make
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Image creation
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--------------
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Amlogic does not provide sources for the firmware and for tools needed
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to create the bootloader image, so it is necessary to obtain them from
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git trees published by the board vendor:
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.. code-block:: bash
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$ git clone -b radxa-zero-v2021.07 https://github.com/radxa/u-boot.git
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$ git clone https://github.com/radxa/fip.git
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$ sudo apt-get install -y gcc-aarch64-linux-gnu device-tree-compiler libncurses5 libncurses5-dev
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$ sudo apt-get install -y bc python dosfstools flex build-essential libssl-dev mtools
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$ 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
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$ sudo tar xvf gcc-arm-10.3-2021.07-x86_64-aarch64-none-elf.tar.xz -C /opt
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$ export CROSS_COMPILE=/opt/gcc-arm-10.2-2020.11-x86_64-aarch64-none-elf/bin/aarch64-none-elf-
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$ export ARCH=arm
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$ cd u-boot
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$ make radxa-zero_defconfig
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$ make
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$ cp u-boot.bin ../fip/radxa-zero/bl33.bin
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$ cd ../fip/radxa-zero
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$ make
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This will generate:
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.. code-block:: bash
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$ u-boot.bin u-boot.bin.sd.bin u-boot.bin.usb.bl2 u-boot.bin.usb.tpl
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Then write the image to SD with:
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.. code-block:: bash
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$ DEV=/dev/your_sd_device
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$ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1
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$ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=444
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