/ { cpuapp_ram0_ret@22004000 { compatible = "zephyr,memory-region", "mmio-sram"; reg = <0x22004000 DT_SIZE_K(16)>; zephyr,memory-region = "RetainedMem"; status = "okay"; retainedmem0: retainedmem { compatible = "zephyr,retained-ram"; status = "okay"; }; }; aliases { retainedmemtestdevice = &retainedmem0; }; }; &cpuapp_ram0 { reg = <0x22000000 DT_SIZE_K(16)>; ranges = <0x0 0x22000000 0x4000>; };