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-* LPDDR2 SDRAM memories compliant to JEDEC JESD209-2
-
-Required properties:
-- compatible : Should be one of - "jedec,lpddr2-nvm", "jedec,lpddr2-s2",
- "jedec,lpddr2-s4"
-
- "ti,jedec-lpddr2-s2" should be listed if the memory part is LPDDR2-S2 type
-
- "ti,jedec-lpddr2-s4" should be listed if the memory part is LPDDR2-S4 type
-
- "ti,jedec-lpddr2-nvm" should be listed if the memory part is LPDDR2-NVM type
-
-- density : <u32> representing density in Mb (Mega bits)
-
-- io-width : <u32> representing bus width. Possible values are 8, 16, and 32
-
-Optional properties:
-
-The following optional properties represent the minimum value of some AC
-timing parameters of the DDR device in terms of number of clock cycles.
-These values shall be obtained from the device data-sheet.
-- tRRD-min-tck
-- tWTR-min-tck
-- tXP-min-tck
-- tRTP-min-tck
-- tCKE-min-tck
-- tRPab-min-tck
-- tRCD-min-tck
-- tWR-min-tck
-- tRASmin-min-tck
-- tCKESR-min-tck
-- tFAW-min-tck
-
-Child nodes:
-- The lpddr2 node may have one or more child nodes of type "lpddr2-timings".
- "lpddr2-timings" provides AC timing parameters of the device for
- a given speed-bin. The user may provide the timings for as many
- speed-bins as is required. Please see Documentation/devicetree/
- bindings/ddr/lpddr2-timings.txt for more information on "lpddr2-timings"
-
-Example:
-
-elpida_ECB240ABACN : lpddr2 {
- compatible = "Elpida,ECB240ABACN","jedec,lpddr2-s4";
- density = <2048>;
- io-width = <32>;
-
- tRPab-min-tck = <3>;
- tRCD-min-tck = <3>;
- tWR-min-tck = <3>;
- tRASmin-min-tck = <3>;
- tRRD-min-tck = <2>;
- tWTR-min-tck = <2>;
- tXP-min-tck = <2>;
- tRTP-min-tck = <2>;
- tCKE-min-tck = <3>;
- tCKESR-min-tck = <3>;
- tFAW-min-tck = <8>;
-
- timings_elpida_ECB240ABACN_400mhz: lpddr2-timings@0 {
- compatible = "jedec,lpddr2-timings";
- min-freq = <10000000>;
- max-freq = <400000000>;
- tRPab = <21000>;
- tRCD = <18000>;
- tWR = <15000>;
- tRAS-min = <42000>;
- tRRD = <10000>;
- tWTR = <7500>;
- tXP = <7500>;
- tRTP = <7500>;
- tCKESR = <15000>;
- tDQSCK-max = <5500>;
- tFAW = <50000>;
- tZQCS = <90000>;
- tZQCL = <360000>;
- tZQinit = <1000000>;
- tRAS-max-ns = <70000>;
- };
-
- timings_elpida_ECB240ABACN_200mhz: lpddr2-timings@1 {
- compatible = "jedec,lpddr2-timings";
- min-freq = <10000000>;
- max-freq = <200000000>;
- tRPab = <21000>;
- tRCD = <18000>;
- tWR = <15000>;
- tRAS-min = <42000>;
- tRRD = <10000>;
- tWTR = <10000>;
- tXP = <7500>;
- tRTP = <7500>;
- tCKESR = <15000>;
- tDQSCK-max = <5500>;
- tFAW = <50000>;
- tZQCS = <90000>;
- tZQCL = <360000>;
- tZQinit = <1000000>;
- tRAS-max-ns = <70000>;
- };
-
-}