arch/arm/boot/dts/samsung_k3pe0e000b.dtsi

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Timings and Geometry for Samsung K3PE0E000B memory part
   4  */
   5
   6 / {
   7         samsung_K3PE0E000B: lpddr2 {
   8                 compatible      = "Samsung,K3PE0E000B","jedec,lpddr2-s4";
   9                 density         = <4096>;
  10                 io-width        = <32>;
  11
  12                 tRPab-min-tck   = <3>;
  13                 tRCD-min-tck    = <3>;
  14                 tWR-min-tck     = <3>;
  15                 tRASmin-min-tck = <3>;
  16                 tRRD-min-tck    = <2>;
  17                 tWTR-min-tck    = <2>;
  18                 tXP-min-tck     = <2>;
  19                 tRTP-min-tck    = <2>;
  20                 tCKE-min-tck    = <3>;
  21                 tCKESR-min-tck  = <3>;
  22                 tFAW-min-tck    = <8>;
  23
  24                 timings_samsung_K3PE0E000B_533MHz: lpddr2-timings@0 {
  25                         compatible      = "jedec,lpddr2-timings";
  26                         min-freq        = <10000000>;
  27                         max-freq        = <533333333>;
  28                         tRPab           = <21000>;
  29                         tRCD            = <18000>;
  30                         tWR             = <15000>;
  31                         tRAS-min        = <42000>;
  32                         tRRD            = <10000>;
  33                         tWTR            = <7500>;
  34                         tXP             = <7500>;
  35                         tRTP            = <7500>;
  36                         tCKESR          = <15000>;
  37                         tDQSCK-max      = <5500>;
  38                         tFAW            = <50000>;
  39                         tZQCS           = <90000>;
  40                         tZQCL           = <360000>;
  41                         tZQinit         = <1000000>;
  42                         tRAS-max-ns     = <70000>;
  43                         tDQSCK-max-derated = <6000>;
  44                 };
  45
  46                 timings_samsung_K3PE0E000B_266MHz: lpddr2-timings@1 {
  47                         compatible      = "jedec,lpddr2-timings";
  48                         min-freq        = <10000000>;
  49                         max-freq        = <266666666>;
  50                         tRPab           = <21000>;
  51                         tRCD            = <18000>;
  52                         tWR             = <15000>;
  53                         tRAS-min        = <42000>;
  54                         tRRD            = <10000>;
  55                         tWTR            = <7500>;
  56                         tXP             = <7500>;
  57                         tRTP            = <7500>;
  58                         tCKESR          = <15000>;
  59                         tDQSCK-max      = <5500>;
  60                         tFAW            = <50000>;
  61                         tZQCS           = <90000>;
  62                         tZQCL           = <360000>;
  63                         tZQinit         = <1000000>;
  64                         tRAS-max-ns     = <70000>;
  65                         tDQSCK-max-derated = <6000>;
  66                 };
  67         };
  68 };