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authorMate Kukri <kukri.mate@gmail.com>2024-04-23 18:04:38 +0100
committerFelix Held <felix-coreboot@felixheld.de>2024-04-24 17:42:40 +0000
commit75dd80649925a5a30486a40068b7bb287c07b167 (patch)
treeb0f988cd57edecef37d2dcbcda46e3312fa2f631 /src/acpi
parent51e472d568339fd76222933b16b88ddafaa8177b (diff)
mb/dell/optiplex_9020: Implement late HWM initialization
There are 4 different chassis types specified by vendor firmware, each with a slightly different HWM configuration. The chassis type to use is determined at runtime by reading a set of 4 PCH GPIOs: 70, 38, 17, and 1. Additionally vendor firmware also provides an option to run the fans at full speed. This is substituted with a coreboot nvram option in this implementation. This was tested to make fan control work on my OptiPlex 7020 SFF. NOTE: This is superficially similar to the OptiPlex 9010's SCH5545 however the OptiPlex 9020's SCH5555 does not use externally programmed EC firmware. Change-Id: Ibdccd3fc7364e03e84ca606592928410624eed43 Signed-off-by: Mate Kukri <kukri.mate@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/81529 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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