Following is the code snippet in a device tree file:   flash@0 {                compatible = n25q128;                reg = <0x0>;                spi-max-frequency = <50000000>;                #address-cells = <1>;                #size-cells = <1>;                partition@qspi-fsbl-uboot {                    label = qspi-fsbl-uboot;                    reg = <0x0 0x100000>;                };                partition@qspi-linux {                    label = qspi-linux;                    reg = <0x100000 0x500000>;                };                partition@qspi-device-tree {                    label = qspi-device-tree;                    reg = <0x600000 0x20000>;                };                partition@qspi-rootfs {                    label = qspi-rootfs;                    reg = <0x620000 0x5E0000>;                };                partition@qspi-bitstream {                    label = qspi-bitstream;                    reg = <0xC00000 0x400000>;                };            };My simple question is what are the two values in < >? for example in reg = <0x600000 0x20000>; I thought it is initial and final address , but this will be meaning less here since final cannot be lower than initial. 
What are the two values in < > in a device tree .dts file?
embedded;devices;device tree