1*8cc087a1SEmmanuel Vadot* AC timing parameters of LPDDR2(JESD209-2) memories for a given speed-bin 2*8cc087a1SEmmanuel Vadot 3*8cc087a1SEmmanuel VadotRequired properties: 4*8cc087a1SEmmanuel Vadot- compatible : Should be "jedec,lpddr2-timings" 5*8cc087a1SEmmanuel Vadot- min-freq : minimum DDR clock frequency for the speed-bin. Type is <u32> 6*8cc087a1SEmmanuel Vadot- max-freq : maximum DDR clock frequency for the speed-bin. Type is <u32> 7*8cc087a1SEmmanuel Vadot 8*8cc087a1SEmmanuel VadotOptional properties: 9*8cc087a1SEmmanuel Vadot 10*8cc087a1SEmmanuel VadotThe following properties represent AC timing parameters from the memory 11*8cc087a1SEmmanuel Vadotdata-sheet of the device for a given speed-bin. All these properties are 12*8cc087a1SEmmanuel Vadotof type <u32> and the default unit is ps (pico seconds). Parameters with 13*8cc087a1SEmmanuel Vadota different unit have a suffix indicating the unit such as 'tRAS-max-ns' 14*8cc087a1SEmmanuel Vadot- tRCD 15*8cc087a1SEmmanuel Vadot- tWR 16*8cc087a1SEmmanuel Vadot- tRAS-min 17*8cc087a1SEmmanuel Vadot- tRRD 18*8cc087a1SEmmanuel Vadot- tWTR 19*8cc087a1SEmmanuel Vadot- tXP 20*8cc087a1SEmmanuel Vadot- tRTP 21*8cc087a1SEmmanuel Vadot- tDQSCK-max 22*8cc087a1SEmmanuel Vadot- tFAW 23*8cc087a1SEmmanuel Vadot- tZQCS 24*8cc087a1SEmmanuel Vadot- tZQinit 25*8cc087a1SEmmanuel Vadot- tRPab 26*8cc087a1SEmmanuel Vadot- tZQCL 27*8cc087a1SEmmanuel Vadot- tCKESR 28*8cc087a1SEmmanuel Vadot- tRAS-max-ns 29*8cc087a1SEmmanuel Vadot- tDQSCK-max-derated 30*8cc087a1SEmmanuel Vadot 31*8cc087a1SEmmanuel VadotExample: 32*8cc087a1SEmmanuel Vadot 33*8cc087a1SEmmanuel Vadottimings_elpida_ECB240ABACN_400mhz: lpddr2-timings@0 { 34*8cc087a1SEmmanuel Vadot compatible = "jedec,lpddr2-timings"; 35*8cc087a1SEmmanuel Vadot min-freq = <10000000>; 36*8cc087a1SEmmanuel Vadot max-freq = <400000000>; 37*8cc087a1SEmmanuel Vadot tRPab = <21000>; 38*8cc087a1SEmmanuel Vadot tRCD = <18000>; 39*8cc087a1SEmmanuel Vadot tWR = <15000>; 40*8cc087a1SEmmanuel Vadot tRAS-min = <42000>; 41*8cc087a1SEmmanuel Vadot tRRD = <10000>; 42*8cc087a1SEmmanuel Vadot tWTR = <7500>; 43*8cc087a1SEmmanuel Vadot tXP = <7500>; 44*8cc087a1SEmmanuel Vadot tRTP = <7500>; 45*8cc087a1SEmmanuel Vadot tCKESR = <15000>; 46*8cc087a1SEmmanuel Vadot tDQSCK-max = <5500>; 47*8cc087a1SEmmanuel Vadot tFAW = <50000>; 48*8cc087a1SEmmanuel Vadot tZQCS = <90000>; 49*8cc087a1SEmmanuel Vadot tZQCL = <360000>; 50*8cc087a1SEmmanuel Vadot tZQinit = <1000000>; 51*8cc087a1SEmmanuel Vadot tRAS-max-ns = <70000>; 52*8cc087a1SEmmanuel Vadot}; 53