tree f0cf33cd624a0bc3f11f7b266da3bbd282af96bd
parent 8d9c391a84a35b4649edfc21a762b44ba09c8d68
author Matt Spinler <spinler@us.ibm.com> 1699556131 -0600
committer Matt Spinler <spinler@us.ibm.com> 1699558298 -0600

control:configs:rainier-2u: Use memory DVFS temps

Instead of hardcoding the increase and decrease temperatures for the
memory related sensors, do the same as what was done for the processor
core and ioring temps and use an offset from the DVFS (dynamic
voltage and frequency scaling) sensor for that sensor type.

This is being done because DDR4 and DDR5 memory have different DVFS
temperatures where the OCC starts throttling/slewing, and so just
hardcoding a single temperature value wouldn't work.

The *_increase_temp and *_decrease_temp modifier values were chosen such that
the final increase and decrease parameter temperature values were the
same as what the hardcoded temperatures were for DDR4.  They were
calculated by subtracting the old increase/decrease temp values from the
DVFS value.

Tested:
Checked the parameters that were present on a Rainier-2U:
    "dram_extmb_dvfs_decrease_temp": 52.0,
    "dram_extmb_dvfs_increase_temp": 55.0,
    "pmic_dvfs_decrease_temp": 65.0,
    "pmic_dvfs_increase_temp": 68.0,

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I339df9e803f81ba0e6c1f05bb9403dc4a59ade8e