Documentation: dt: Update ti,emif bindings

Update the Texas Instruments EMIF binding document to include the device
tree bindings for ti,emif-am3352 and ti,emif-am4372 which are used by
the ti-emif-sram driver to provide low-level PM functionality.

Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>

diff --git a/Documentation/devicetree/bindings/memory-controllers/ti/emif.txt b/Documentation/devicetree/bindings/memory-controllers/ti/emif.txt
index fd823d6091b29514e0db29a3b73b1c47edbf064f..29a99871e808c5ca146dd8f04407f9b0b6f7b30c 100644 (file)
--- a/Documentation/devicetree/bindings/memory-controllers/ti/emif.txt
+++ b/Documentation/devicetree/bindings/memory-controllers/ti/emif.txt
@@ -23,6 +23,13 @@ Required properties:
   the value shall be "emif<n>" where <n> is the number of the EMIF
   instance with base 1.
 
+Required only for "ti,emif-am3352" and "ti,emif-am4372":
+- sram                 : Phandles for generic sram driver nodes,
+  first should be type 'protect-exec' for the driver to use to copy
+  and run PM functions, second should be regular pool to be used for
+  data region for code. See Documentation/devicetree/bindings/sram/sram.txt
+  for more details.
+
 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
@@ -44,7 +51,7 @@ Optional properties:
 - hw-caps-temp-alert   : Have this property if the controller
   has capability for generating SDRAM temperature alerts
 
-Example:
+-Examples:
 
 emif1: emif@0x4c000000 {
        compatible      = "ti,emif-4d";
@@ -56,3 +63,11 @@ emif1: emif@0x4c000000 {
        hw-caps-ll-interface;
        hw-caps-temp-alert;
 };
+
+/* From am33xx.dtsi */
+emif: emif@4c000000 {
+        compatible = "ti,emif-am3352";
+        reg =   <0x4C000000 0x1000>;
+        sram = <&pm_sram_code
+                &pm_sram_data>;
+};