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R37/R38 enable high-speed mode (10Gbps) for TX and RX on SFP modules.
Without this change CN9130 SoM SFP port will be limited to sgmii (2.5Gbps and lower) speeds even though the cpu side supports up to 10Gbps.
SoC Clocking Bootstrap
Note: Clearfog Base revision 1.4.8 and later already include these changes.
Dis-/Assemble the components from table below:
# | RefDes | Action | Comments |
1 | R153 | Add | resistor 470Ω |
Impact
R153 pulls CP_MPP[15] high during reset, which makes possible (but does not activate by itself) 2.2GHz cpu speed.