mirror of
https://github.com/AsahiLinux/u-boot
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48 lines
1.4 KiB
ReStructuredText
48 lines
1.4 KiB
ReStructuredText
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.. SPDX-License-Identifier: GPL-2.0+
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U-Boot for Anbernic RGxx3 Devices
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=================================
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This allows U-Boot to boot the following Anbernic devices:
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- Anbernic RG353M
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- Anbernic RG353P
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- Anbernic RG353V
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- Anbernic RG353VS
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- Anbernic RG503
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The correct device is detected automatically by comparing ADC values
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from ADC channel 1. In the event of an RG353V, an attempt is then made
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to probe for an eMMC and if it fails the device is assumed to be an
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RG353VS. Based on the detected device, the environment variables
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"board", "board_name", and "fdtfile" are set to the correct values
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corresponding to the board which can be read by a boot script to boot
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with the correct device tree.
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Please note that there are some versions of the RG353 devices with
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different panels. Panel auto-detection is planned for a later date.
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Building U-Boot
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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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$ export BL31=../rkbin/bin/rk35/rk3568_bl31_v1.34.elf
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$ export ROCKCHIP_TPL=../rkbin/bin/rk35/rk3568_ddr_1056MHz_v1.13.bin
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$ make anbernic-rgxx3_defconfig
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$ make
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This will build ``u-boot-rockchip.bin`` which can be written to an SD
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card.
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Image installation
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------------------
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Write the ``u-boot-rockchip.bin`` to an SD card offset 32kb from the
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start.
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.. code-block:: bash
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$ dd if=u-boot-rockchip.bin of=/dev/mmcblk0 bs=512 seek=64
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