Computer/Olimex Lime2

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1 Device information

This computer continues to be produced over the years. Because of that it's normal to have small to medium variations of the device over time to continue to be able to produce it.

While tiny variations are probably not a noticeable, at some point the chip used for the Ethernet changed two times (probably because the older one was not available anymore).

The differences and support for it in Parabola were summarized in the table below:

Revisions Chip Supported
A to E Realtek RTL8211CL Probably works
F to G2 Realtek RTL8211E PHY Yes
H to L Micrel KSZ9031 PHY in rev. Work in progress: A special u-boot that is needed to make Ethernet work is available outside of Parabola in the meantime.

2 Other resources

There is a wiki page on the Lime2 and Lime2 eMMC on the wiki.

3 Upstream status

For the supported versions:

Software Status
  • (Almost) complete support in Linux.
u-boot (bootloader)
  • (Almost) complete support in u-boot.
  • HDMI displays and USB keyboards work in u-boot for this board

4 Booting

The bootloader cannot be installed on all storage devices, as the bootrom only supports loading it from certain storage devices.

See the table below to see which storage devices you can install the booloader on:

Storage device Bootloader can be installed
MicroSD Yes
USB keys, USB Hard drive, etc No

Once the bootloader runs, it can access files on USB keys, SATA HDD / SSD, etc.

However ARM bootloaders like u-boot often lags behind Linux:

  • u-boot doesn't support all the newer ext4 filesystem features
  • u-boot cannot open encrypted partitions

The installation instructions already takes all that into account, so you will either need to format the ext4 filesystem in a special way or convert it to not use certain features.

5 Installation

Available bootloaders:

6 Free software status

  • To use it you probably need a microSD and potentially other mass storage devices. MicroSD and most of the mass storage devices (HDD, SSD, eMMC, USB keys, etc) have a firmware inside.
  • The board could probably meet the RYF requirements pretty easily as as far as I know everything works with free software (including the GPU and the video decoding offload). Note that certain software configurations might be needed to use the GPU such as Wayland or configuring randr render offload in Xorg.

7 Technical references

dts sun7i-a20-olinuxino-lime2.dts
u-boot configuration A20-OLinuXino-Lime_defconfig

8 See also