1*4882a593Smuzhiyun* AC timing parameters of LPDDR2(JESD209-2) memories for a given speed-bin 2*4882a593Smuzhiyun 3*4882a593SmuzhiyunRequired properties: 4*4882a593Smuzhiyun- compatible : Should be "jedec,lpddr2-timings" 5*4882a593Smuzhiyun- min-freq : minimum DDR clock frequency for the speed-bin. Type is <u32> 6*4882a593Smuzhiyun- max-freq : maximum DDR clock frequency for the speed-bin. Type is <u32> 7*4882a593Smuzhiyun 8*4882a593SmuzhiyunOptional properties: 9*4882a593Smuzhiyun 10*4882a593SmuzhiyunThe following properties represent AC timing parameters from the memory 11*4882a593Smuzhiyundata-sheet of the device for a given speed-bin. All these properties are 12*4882a593Smuzhiyunof type <u32> and the default unit is ps (pico seconds). Parameters with 13*4882a593Smuzhiyuna different unit have a suffix indicating the unit such as 'tRAS-max-ns' 14*4882a593Smuzhiyun- tRCD 15*4882a593Smuzhiyun- tWR 16*4882a593Smuzhiyun- tRAS-min 17*4882a593Smuzhiyun- tRRD 18*4882a593Smuzhiyun- tWTR 19*4882a593Smuzhiyun- tXP 20*4882a593Smuzhiyun- tRTP 21*4882a593Smuzhiyun- tDQSCK-max 22*4882a593Smuzhiyun- tFAW 23*4882a593Smuzhiyun- tZQCS 24*4882a593Smuzhiyun- tZQinit 25*4882a593Smuzhiyun- tRPab 26*4882a593Smuzhiyun- tZQCL 27*4882a593Smuzhiyun- tCKESR 28*4882a593Smuzhiyun- tRAS-max-ns 29*4882a593Smuzhiyun- tDQSCK-max-derated 30*4882a593Smuzhiyun 31*4882a593SmuzhiyunExample: 32*4882a593Smuzhiyun 33*4882a593Smuzhiyuntimings_elpida_ECB240ABACN_400mhz: lpddr2-timings@0 { 34*4882a593Smuzhiyun compatible = "jedec,lpddr2-timings"; 35*4882a593Smuzhiyun min-freq = <10000000>; 36*4882a593Smuzhiyun max-freq = <400000000>; 37*4882a593Smuzhiyun tRPab = <21000>; 38*4882a593Smuzhiyun tRCD = <18000>; 39*4882a593Smuzhiyun tWR = <15000>; 40*4882a593Smuzhiyun tRAS-min = <42000>; 41*4882a593Smuzhiyun tRRD = <10000>; 42*4882a593Smuzhiyun tWTR = <7500>; 43*4882a593Smuzhiyun tXP = <7500>; 44*4882a593Smuzhiyun tRTP = <7500>; 45*4882a593Smuzhiyun tCKESR = <15000>; 46*4882a593Smuzhiyun tDQSCK-max = <5500>; 47*4882a593Smuzhiyun tFAW = <50000>; 48*4882a593Smuzhiyun tZQCS = <90000>; 49*4882a593Smuzhiyun tZQCL = <360000>; 50*4882a593Smuzhiyun tZQinit = <1000000>; 51*4882a593Smuzhiyun tRAS-max-ns = <70000>; 52*4882a593Smuzhiyun}; 53