Documentation/devicetree/bindings/memory-controllers/ti/emif.txt

   1 * EMIF family of TI SDRAM controllers
   2
   3 EMIF - External Memory Interface - is an SDRAM controller used in
   4 TI SoCs. EMIF supports, based on the IP revision, one or more of
   5 DDR2/DDR3/LPDDR2 protocols. This binding describes a given instance
   6 of the EMIF IP and memory parts attached to it.
   7
   8 Required properties:
   9 - compatible    : Should be of the form "ti,emif-<ip-rev>" where <ip-rev>
  10   is the IP revision of the specific EMIF instance. For newer controllers,
  11   compatible should be one of the following:
  12              "ti,emif-am3352"
  13              "ti,emif-am4372"
  14
  15 - phy-type      : <u32> indicating the DDR phy type. Following are the
  16   allowed values
  17   <1>   : Attila PHY
  18   <2>   : Intelli PHY
  19
  20 - device-handle : phandle to a "lpddr2" node representing the memory part
  21
  22 - ti,hwmods     : For TI hwmods processing and omap device creation
  23   the value shall be "emif<n>" where <n> is the number of the EMIF
  24   instance with base 1.
  25
  26 Optional properties:
  27 - cs1-used              : Have this property if CS1 of this EMIF
  28   instance has a memory part attached to it. If there is a memory
  29   part attached to CS1, it should be the same type as the one on CS0,
  30   so there is no need to give the details of this memory part.
  31
  32 - cal-resistor-per-cs   : Have this property if the board has one
  33   calibration resistor per chip-select.
  34
  35 - hw-caps-read-idle-ctrl: Have this property if the controller
  36   supports read idle window programming
  37
  38 - hw-caps-dll-calib-ctrl: Have this property if the controller
  39   supports dll calibration control
  40
  41 - hw-caps-ll-interface  : Have this property if the controller
  42   has a low latency interface and corresponding interrupt events
  43
  44 - hw-caps-temp-alert    : Have this property if the controller
  45   has capability for generating SDRAM temperature alerts
  46
  47 Example:
  48
  49 emif1: emif@4c000000 {
  50         compatible      = "ti,emif-4d";
  51         ti,hwmods       = "emif2";
  52         phy-type        = <1>;
  53         device-handle   = <&elpida_ECB240ABACN>;
  54         cs1-used;
  55         hw-caps-read-idle-ctrl;
  56         hw-caps-ll-interface;
  57         hw-caps-temp-alert;
  58 };