ARMADA A388 SOM U-Boot ODT Update

Summary

Old versions of U-Boot did not configure correctly the ODT on data signals of DDR RAM on ARMADA A388 SOMs. This article provides information about the affected hardware and U-Boot versions.

Impact

Incorrect ODT configuration might cause data corruption on write to RAM due to electric reflection of data signal.

Affected Hardware

All systems with ARMADA A388 SOM are affected. Actual corruption has only been observed on SOM rev 2.1.

Fixed U-Boot Versions

U-Boot versions older than version 2018.03 are affected. Upstream U-Boot versions 2018.03 and newer are fixed, but only for SOMs with 1GB RAM. The mainline U-Boot fix is in commit dbaf09590df9ad.

SolidRun U-Boot for ARMADA A388 based on upstream version 2018.01 is fixed since commit ab15b2d5b6ee.

SolidRun U-Boot for ARMADA A388 based on Marvell provided source tree version 2013.01-15t1 is fixed since commit aba763a611e69f.

Solution

To make sure Armada A38x RAM ODT is configured correctly on your system, do one of the following:

• Update U-Boot on your system to a fixed version

• Apply the applicable fix commit to your U-Boot source tree