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IMX7D power saving mode result

Question asked by Franky Hsu on Jun 19, 2017
Latest reply on Jul 31, 2017 by igorpadykov

Hi Support,


1. DSM mode

We are trying to get some testing data on DSM mode description in AN5383. We set "echo mem > /sys/power/state" and measure the result. Each power rail to IMX7D pins look well except the VDD_SOC that is still about 60mA. Seems the VDD_SOC is not in the right idle mode. How do we check it?


2. normal mode

After power on, the system will run system idle mode when no thread, we can see the VDD_ARM is about 5mA, it's acceptable for us, but we found the VDD_SOC is about 200mA. It's so large and just like we run 100% on M4 processor but we do nothing. How do we check it?