* AC timing parameters of LPDDR3 memories for a given speed-bin.

The structures are based on LPDDR2 and extended where needed.

Required properties:
- compatible : Should be "jedec,lpddr3-timings"
- min-freq : minimum DDR clock frequency for the speed-bin. Type is <u32>
- reg : maximum DDR clock frequency for the speed-bin. Type is <u32>

Optional properties:

The following properties represent AC timing parameters from the memory
data-sheet of the device for a given speed-bin. All these properties are
of type <u32> and the default unit is ps (pico seconds).
- tRFC
- tRRD
- tRPab
- tRPpb
- tRCD
- tRC
- tRAS
- tWTR
- tWR
- tRTP
- tW2W-C2C
- tR2R-C2C
- tFAW
- tXSR
- tXP
- tCKE
- tCKESR
- tMRD

Example:

timings_samsung_K3QF2F20DB_800mhz: lpddr3-timings@800000000 {
	compatible	= "jedec,lpddr3-timings";
	reg		= <800000000>; /* workaround: it shows max-freq */
	min-freq	= <100000000>;
	tRFC		= <65000>;
	tRRD		= <6000>;
	tRPab		= <12000>;
	tRPpb		= <12000>;
	tRCD		= <10000>;
	tRC		= <33750>;
	tRAS		= <23000>;
	tWTR		= <3750>;
	tWR		= <7500>;
	tRTP		= <3750>;
	tW2W-C2C	= <0>;
	tR2R-C2C	= <0>;
	tFAW		= <25000>;
	tXSR		= <70000>;
	tXP		= <3750>;
	tCKE		= <3750>;
	tCKESR		= <3750>;
	tMRD		= <7000>;
};