ARM: at91: add ram controller DT support

We can now drop the call to ioremap_registers() as we have the binding for the
SDRAM/DDR Controller.

Drop ioremap_registers() for sam9x5 too.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.txt b/Documentation/devicetree/bindings/arm/atmel-at91.txt
index a64f86717b5d..1f8782077433 100644
--- a/Documentation/devicetree/bindings/arm/atmel-at91.txt
+++ b/Documentation/devicetree/bindings/arm/atmel-at91.txt
@@ -42,3 +42,22 @@ Example:
 		compatible = "atmel,at91sam9260-rstc";
 		reg = <0xfffffd00 0x10>;
 	};
+
+RAMC SDRAM/DDR Controller required properties:
+- compatible: Should be "atmel,at91sam9260-sdramc",
+			"atmel,at91sam9g45-ddramc",
+- reg: Should contain registers location and length
+  For at91sam9263 and at91sam9g45 you must specify 2 entries.
+
+Examples:
+
+	ramc0: ramc@ffffe800 {
+		compatible = "atmel,at91sam9g45-ddramc";
+		reg = <0xffffe800 0x200>;
+	};
+
+	ramc0: ramc@ffffe400 {
+		compatible = "atmel,at91sam9g45-ddramc";
+		reg = <0xffffe400 0x200
+		       0xffffe600 0x200>;
+	};