What:		/sys/bus/platform/devices/*/srpd
Date:		July 2022
KernelVersion:	5.21
Contact:	Florian Fainelli <f.fainelli@gmail.com>
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 <f.fainelli@gmail.com>
Description:
		DDR PHY frequency in Hz.