1*c66ec88fSEmmanuel Vadot* AC timing parameters of LPDDR2(JESD209-2) memories for a given speed-bin 2*c66ec88fSEmmanuel Vadot 3*c66ec88fSEmmanuel VadotRequired properties: 4*c66ec88fSEmmanuel Vadot- compatible : Should be "jedec,lpddr2-timings" 5*c66ec88fSEmmanuel Vadot- min-freq : minimum DDR clock frequency for the speed-bin. Type is <u32> 6*c66ec88fSEmmanuel Vadot- max-freq : maximum DDR clock frequency for the speed-bin. Type is <u32> 7*c66ec88fSEmmanuel Vadot 8*c66ec88fSEmmanuel VadotOptional properties: 9*c66ec88fSEmmanuel Vadot 10*c66ec88fSEmmanuel VadotThe following properties represent AC timing parameters from the memory 11*c66ec88fSEmmanuel Vadotdata-sheet of the device for a given speed-bin. All these properties are 12*c66ec88fSEmmanuel Vadotof type <u32> and the default unit is ps (pico seconds). Parameters with 13*c66ec88fSEmmanuel Vadota different unit have a suffix indicating the unit such as 'tRAS-max-ns' 14*c66ec88fSEmmanuel Vadot- tRCD 15*c66ec88fSEmmanuel Vadot- tWR 16*c66ec88fSEmmanuel Vadot- tRAS-min 17*c66ec88fSEmmanuel Vadot- tRRD 18*c66ec88fSEmmanuel Vadot- tWTR 19*c66ec88fSEmmanuel Vadot- tXP 20*c66ec88fSEmmanuel Vadot- tRTP 21*c66ec88fSEmmanuel Vadot- tDQSCK-max 22*c66ec88fSEmmanuel Vadot- tFAW 23*c66ec88fSEmmanuel Vadot- tZQCS 24*c66ec88fSEmmanuel Vadot- tZQinit 25*c66ec88fSEmmanuel Vadot- tRPab 26*c66ec88fSEmmanuel Vadot- tZQCL 27*c66ec88fSEmmanuel Vadot- tCKESR 28*c66ec88fSEmmanuel Vadot- tRAS-max-ns 29*c66ec88fSEmmanuel Vadot- tDQSCK-max-derated 30*c66ec88fSEmmanuel Vadot 31*c66ec88fSEmmanuel VadotExample: 32*c66ec88fSEmmanuel Vadot 33*c66ec88fSEmmanuel Vadottimings_elpida_ECB240ABACN_400mhz: lpddr2-timings@0 { 34*c66ec88fSEmmanuel Vadot compatible = "jedec,lpddr2-timings"; 35*c66ec88fSEmmanuel Vadot min-freq = <10000000>; 36*c66ec88fSEmmanuel Vadot max-freq = <400000000>; 37*c66ec88fSEmmanuel Vadot tRPab = <21000>; 38*c66ec88fSEmmanuel Vadot tRCD = <18000>; 39*c66ec88fSEmmanuel Vadot tWR = <15000>; 40*c66ec88fSEmmanuel Vadot tRAS-min = <42000>; 41*c66ec88fSEmmanuel Vadot tRRD = <10000>; 42*c66ec88fSEmmanuel Vadot tWTR = <7500>; 43*c66ec88fSEmmanuel Vadot tXP = <7500>; 44*c66ec88fSEmmanuel Vadot tRTP = <7500>; 45*c66ec88fSEmmanuel Vadot tCKESR = <15000>; 46*c66ec88fSEmmanuel Vadot tDQSCK-max = <5500>; 47*c66ec88fSEmmanuel Vadot tFAW = <50000>; 48*c66ec88fSEmmanuel Vadot tZQCS = <90000>; 49*c66ec88fSEmmanuel Vadot tZQCL = <360000>; 50*c66ec88fSEmmanuel Vadot tZQinit = <1000000>; 51*c66ec88fSEmmanuel Vadot tRAS-max-ns = <70000>; 52*c66ec88fSEmmanuel Vadot}; 53