20.07.2018 03:07, Andrew Jeffery wrote: >> Andrew, can you start with a list that shows what you expect us to need >> on our systems ? >> > Okay, our Witherspoon and Romulus platforms containing the ASPEED AST2500 currently need the following tuneables exposed: > > From the SCU: > - Debug UART enable > - VGA DAC mux > - VGA scratch registers 0-7 > - LPC SuperIO decode enable > - VGA MMIO decode enable > > From the LPC controller: > - iLPC2AHB enable > - SuperIO scratch registers 0x20-0x2f > > (The LPC controller is just as much of a collection of random bits as the SCU) > > Lastly, our Palmetto platform uses an AST2400 which has fewer features compared to the AST2500. Its tuneable list is the same as the above with the exception of "Debug UART enable". > > Tuneables that we may need to expose in the future include: > > From the SCU: > - PCI VID/DID for the BMC PCIe device > - VGA device enable (may need to be disabled if the platform contains a discrete graphics processor) > > From the LPC controller: > - UART mux > > Alexander, Eugene, can you chime in with your platforms' needs? In addition to what you've mentioned, we also need (and I believe you need it too) the SCU3C register (reset control/status) to determine the BMC reset reason and only perform certain actions on cold boots (see https://github.com/openbmc/openbmc/issues/3031). Although, this could probably be handled by a separate driver, don't know which though. Alexander.
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