/ { cpuapp_sram@2002e000 { compatible = "zephyr,memory-region", "mmio-sram"; reg = <0x2002e000 DT_SIZE_K(4)>; zephyr,memory-region = "RetainedMem"; status = "okay"; retainedmem0: retainedmem { compatible = "zephyr,retained-ram"; status = "okay"; }; }; aliases { retainedmemtestdevice = &retainedmem0; }; }; &cpuapp_sram { reg = <0x20000000 DT_SIZE_K(184)>; ranges = <0x0 0x20000000 0x2e000>; };