ARM: u300: add syscon node

This adds a device tree node for the U300 system controller
and remaps this dynamically instead of using hard-coded
virtual addresses. The board power set-up code is altered
to fetch a reference to the syscon using ampersand <&syscon>
notation. This way of passing a pointer to the syscon will
also be used by the clocks.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 27 insertions, 3 deletions

diff --git a/Documentation/devicetree/bindings/arm/ste-u300.txt b/Documentation/devicetree/bindings/arm/ste-u300.txt
index cd9001a667b..69b5ab0b5f4 100644
--- a/Documentation/devicetree/bindings/arm/ste-u300.txt
+++ b/Documentation/devicetree/bindings/arm/ste-u300.txt
@@ -8,15 +8,39 @@ Required root node property:
 
 compatible="stericsson,u300";
 
+Required node: syscon
+This contains the system controller.
+- compatible: must be "stericsson,u300-syscon".
+- reg: the base address and size of the system controller.
+
 Boards with the U300 SoC include:
 
 S365 "Small Board U365":
 
 Required node: s365
+This contains the board-specific information.
+- compatible: must be "stericsson,s365".
+- vana15-supply: the regulator supplying the 1.5V to drive the
+  board.
+- syscon: a pointer to the syscon node so we can acccess the
+  syscon registers to set the board as self-powered.
 
 Example:
 
-s365 {
-	compatible = "stericsson,s365";
-	vana15-supply = <&ab3100_ldo_d_reg>;
+/ {
+	model = "ST-Ericsson U300";
+	compatible = "stericsson,u300";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	s365 {
+		compatible = "stericsson,s365";
+		vana15-supply = <&ab3100_ldo_d_reg>;
+		syscon = <&syscon>;
+	};
+
+	syscon: syscon@c0011000 {
+		compatible = "stericsson,u300-syscon";
+		reg = <0xc0011000 0x1000>;
+	};
 };