What: /sys/bus/platform/devices/*/srpd Date: July 2022 KernelVersion: 5.21 Contact: Florian Fainelli Description: Self Refresh Power Down (SRPD) inactivity timeout counted in internal DDR controller clock cycles. Possible values range from 0 (disable inactivity timeout) to 65535 (0xffff). What: /sys/bus/platform/devices/*/frequency Date: July 2022 KernelVersion: 5.21 Contact: Florian Fainelli Description: DDR PHY frequency in Hz.