1* AC timing parameters of LPDDR3 memories for a given speed-bin. 2 3The structures are based on LPDDR2 and extended where needed. 4 5Required properties: 6- compatible : Should be "jedec,lpddr3-timings" 7- min-freq : minimum DDR clock frequency for the speed-bin. Type is <u32> 8- reg : maximum DDR clock frequency for the speed-bin. Type is <u32> 9 10Optional properties: 11 12The following properties represent AC timing parameters from the memory 13data-sheet of the device for a given speed-bin. All these properties are 14of type <u32> and the default unit is ps (pico seconds). 15- tRFC 16- tRRD 17- tRPab 18- tRPpb 19- tRCD 20- tRC 21- tRAS 22- tWTR 23- tWR 24- tRTP 25- tW2W-C2C 26- tR2R-C2C 27- tFAW 28- tXSR 29- tXP 30- tCKE 31- tCKESR 32- tMRD 33 34Example: 35 36timings_samsung_K3QF2F20DB_800mhz: lpddr3-timings@800000000 { 37 compatible = "jedec,lpddr3-timings"; 38 reg = <800000000>; /* workaround: it shows max-freq */ 39 min-freq = <100000000>; 40 tRFC = <65000>; 41 tRRD = <6000>; 42 tRPab = <12000>; 43 tRPpb = <12000>; 44 tRCD = <10000>; 45 tRC = <33750>; 46 tRAS = <23000>; 47 tWTR = <3750>; 48 tWR = <7500>; 49 tRTP = <3750>; 50 tW2W-C2C = <0>; 51 tR2R-C2C = <0>; 52 tFAW = <25000>; 53 tXSR = <70000>; 54 tXP = <3750>; 55 tCKE = <3750>; 56 tCKESR = <3750>; 57 tMRD = <7000>; 58}; 59