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authorWerner Zeh <werner.zeh@siemens.com>2019-04-12 09:10:27 +0200
committerWerner Zeh <werner.zeh@siemens.com>2019-04-15 11:05:34 +0000
commita4e5236e8945d0acab13e9d6c69daf1efa7ea726 (patch)
tree621af0f75032089b428f497c311dcb8329ca111a /src/cpu
parent43bb6554a24e1dd9944a7d3f518e4374f9e0be79 (diff)
mb/siemens/mc_apl1: Enable HDA in devicetree for all mainboard variants
With commit '4074ce0cc7 (intel/apollolake: Add HDA to disable_dev function)' FSP is now requested to switch off HDA PCI device if it is disabled in devicetree. Doing so results in a warm restart. Normally this event will be stored in CMOS RAM (if the descriptor is configured to do so) and therefore no further resets are requested by FSP on the next boots as long as CMOS RAM is kept alive. The Siemens mainboards based on Apollo Lake do not have a CMOS battery and therefore the CMOS is not backed up. This leads to reset requests from FSP after PCI enumeration on every boot. To avoid this reset enable HDA in devicetree for these mainboards. Though we do not have any usage of HDA it should not be an issue that the HDA device is now enabled. The benefit is though that no reset is requested anymore by FSP. Change-Id: I637c7c01d73350700c6066fee74fecbb5b93b221 Signed-off-by: Werner Zeh <werner.zeh@siemens.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/32295 Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-by: Uwe Poeche <uwe.poeche@siemens.com> Reviewed-by: Mario Scheithauer <mario.scheithauer@siemens.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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