diff options
Diffstat (limited to 'Documentation/devicetree/bindings/memory-controllers/ti/emif.txt')
-rw-r--r-- | Documentation/devicetree/bindings/memory-controllers/ti/emif.txt | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/memory-controllers/ti/emif.txt b/Documentation/devicetree/bindings/memory-controllers/ti/emif.txt new file mode 100644 index 000000000000..938f8e1ba205 --- /dev/null +++ b/Documentation/devicetree/bindings/memory-controllers/ti/emif.txt | |||
@@ -0,0 +1,55 @@ | |||
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. | ||
11 | |||
12 | - phy-type : <u32> indicating the DDR phy type. Following are the | ||
13 | allowed values | ||
14 | <1> : Attila PHY | ||
15 | <2> : Intelli PHY | ||
16 | |||
17 | - device-handle : phandle to a "lpddr2" node representing the memory part | ||
18 | |||
19 | - ti,hwmods : For TI hwmods processing and omap device creation | ||
20 | the value shall be "emif<n>" where <n> is the number of the EMIF | ||
21 | instance with base 1. | ||
22 | |||
23 | Optional properties: | ||
24 | - cs1-used : Have this property if CS1 of this EMIF | ||
25 | instance has a memory part attached to it. If there is a memory | ||
26 | part attached to CS1, it should be the same type as the one on CS0, | ||
27 | so there is no need to give the details of this memory part. | ||
28 | |||
29 | - cal-resistor-per-cs : Have this property if the board has one | ||
30 | calibration resistor per chip-select. | ||
31 | |||
32 | - hw-caps-read-idle-ctrl: Have this property if the controller | ||
33 | supports read idle window programming | ||
34 | |||
35 | - hw-caps-dll-calib-ctrl: Have this property if the controller | ||
36 | supports dll calibration control | ||
37 | |||
38 | - hw-caps-ll-interface : Have this property if the controller | ||
39 | has a low latency interface and corresponding interrupt events | ||
40 | |||
41 | - hw-caps-temp-alert : Have this property if the controller | ||
42 | has capability for generating SDRAM temperature alerts | ||
43 | |||
44 | Example: | ||
45 | |||
46 | emif1: emif@0x4c000000 { | ||
47 | compatible = "ti,emif-4d"; | ||
48 | ti,hwmods = "emif2"; | ||
49 | phy-type = <1>; | ||
50 | device-handle = <&elpida_ECB240ABACN>; | ||
51 | cs1-used; | ||
52 | hw-caps-read-idle-ctrl; | ||
53 | hw-caps-ll-interface; | ||
54 | hw-caps-temp-alert; | ||
55 | }; | ||