57 lines
1.8 KiB
Plaintext
57 lines
1.8 KiB
Plaintext
|
* EMIF family of TI SDRAM controllers
|
||
|
|
|
||
|
|
EMIF - External Memory Interface - is an SDRAM controller used in
|
||
|
|
TI SoCs. EMIF supports, based on the IP revision, one or more of
|
||
|
|
DDR2/DDR3/LPDDR2 protocols. This binding describes a given instance
|
||
|
|
of the EMIF IP and memory parts attached to it.
|
||
|
|
|
||
|
|
Required properties:
|
||
|
|
- compatible : Should be of the form "ti,emif-<ip-rev>" where <ip-rev>
|
||
|
|
is the IP revision of the specific EMIF instance.
|
||
|
|
For am437x should be ti,emif-am4372.
|
||
|
|
|
||
|
|
- phy-type : <u32> indicating the DDR phy type. Following are the
|
||
|
|
allowed values
|
||
|
|
<1> : Attila PHY
|
||
|
|
<2> : Intelli PHY
|
||
|
|
|
||
|
|
- device-handle : phandle to a "lpddr2" node representing the memory part
|
||
|
|
|
||
|
|
- ti,hwmods : For TI hwmods processing and omap device creation
|
||
|
|
the value shall be "emif<n>" where <n> is the number of the EMIF
|
||
|
|
instance with base 1.
|
||
|
|
|
||
|
|
Optional properties:
|
||
|
|
- cs1-used : Have this property if CS1 of this EMIF
|
||
|
|
instance has a memory part attached to it. If there is a memory
|
||
|
|
part attached to CS1, it should be the same type as the one on CS0,
|
||
|
|
so there is no need to give the details of this memory part.
|
||
|
|
|
||
|
|
- cal-resistor-per-cs : Have this property if the board has one
|
||
|
|
calibration resistor per chip-select.
|
||
|
|
|
||
|
|
- hw-caps-read-idle-ctrl: Have this property if the controller
|
||
|
|
supports read idle window programming
|
||
|
|
|
||
|
|
- hw-caps-dll-calib-ctrl: Have this property if the controller
|
||
|
|
supports dll calibration control
|
||
|
|
|
||
|
|
- hw-caps-ll-interface : Have this property if the controller
|
||
|
|
has a low latency interface and corresponding interrupt events
|
||
|
|
|
||
|
|
- hw-caps-temp-alert : Have this property if the controller
|
||
|
|
has capability for generating SDRAM temperature alerts
|
||
|
|
|
||
|
|
Example:
|
||
|
|
|
||
|
|
emif1: emif@0x4c000000 {
|
||
|
|
compatible = "ti,emif-4d";
|
||
|
|
ti,hwmods = "emif2";
|
||
|
|
phy-type = <1>;
|
||
|
|
device-handle = <&elpida_ECB240ABACN>;
|
||
|
|
cs1-used;
|
||
|
|
hw-caps-read-idle-ctrl;
|
||
|
|
hw-caps-ll-interface;
|
||
|
|
hw-caps-temp-alert;
|
||
|
|
};
|