ARM: dts: ixp4xx: Use the expansion bus

Replace the "simple-bus" simplification by the proper bus for
IXP4xx memory or device expansion.

Use chip-select addressing with two address cells on all the
flashes mounted on the IXP4xx devices. This includes all flash
chips.

Change the unit-name from @50000000 to @c4000000 as the DTS
validation screams. The registers for controlling the bus are
at c4000000 but the actual memory windows and ranges are at
50000000. Well it is just syntax, we can live with it.

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

9 files changed, 62 insertions, 24 deletions

diff --git a/arch/arm/boot/dts/intel-ixp42x-dlink-dsm-g600.dts b/arch/arm/boot/dts/intel-ixp42x-dlink-dsm-g600.dts
index 4ea8be3449f9..8b32e9f22d81 100644
--- a/arch/arm/boot/dts/intel-ixp42x-dlink-dsm-g600.dts
+++ b/arch/arm/boot/dts/intel-ixp42x-dlink-dsm-g600.dts
@@ -99,16 +99,16 @@
 	};
 
 	soc {
-		bus@50000000 {
+		bus@c4000000 {
 			/* The first 16MB region at CS0 on the expansion bus */
-			flash@0 {
+			flash@0,0 {
 				compatible = "intel,ixp4xx-flash", "cfi-flash";
 				bank-width = <2>;
 				/*
 				 * 16 MB of Flash in 128 0x20000 sized blocks
 				 * mapped in at CS0.
 				 */
-				reg = <0x00000000 0x1000000>;
+				reg = <0 0x00000000 0x1000000>;
 
 				partitions {
 					compatible = "redboot-fis";
diff --git a/arch/arm/boot/dts/intel-ixp42x-iomega-nas100d.dts b/arch/arm/boot/dts/intel-ixp42x-iomega-nas100d.dts
index 8905aa33ca61..8c18d802c849 100644
--- a/arch/arm/boot/dts/intel-ixp42x-iomega-nas100d.dts
+++ b/arch/arm/boot/dts/intel-ixp42x-iomega-nas100d.dts
@@ -89,16 +89,16 @@
 	};
 
 	soc {
-		bus@50000000 {
+		bus@c4000000 {
 			/* The first 16MB region at CS0 on the expansion bus */
-			flash@0 {
+			flash@0,0 {
 				compatible = "intel,ixp4xx-flash", "cfi-flash";
 				bank-width = <2>;
 				/*
 				 * 8 MB of Flash in 0x20000 byte blocks
 				 * mapped in at CS0.
 				 */
-				reg = <0x00000000 0x800000>;
+				reg = <0 0x00000000 0x800000>;
 
 				partitions {
 					compatible = "redboot-fis";
diff --git a/arch/arm/boot/dts/intel-ixp42x-linksys-nslu2.dts b/arch/arm/boot/dts/intel-ixp42x-linksys-nslu2.dts
index b9a5268fe7ad..e3a32b08d167 100644
--- a/arch/arm/boot/dts/intel-ixp42x-linksys-nslu2.dts
+++ b/arch/arm/boot/dts/intel-ixp42x-linksys-nslu2.dts
@@ -96,16 +96,16 @@
 	};
 
 	soc {
-		bus@50000000 {
+		bus@c4000000 {
 			/* The first 16MB region at CS0 on the expansion bus */
-			flash@0 {
+			flash@0,0 {
 				compatible = "intel,ixp4xx-flash", "cfi-flash";
 				bank-width = <2>;
 				/*
 				 * 8 MB of Flash in 0x20000 byte blocks
 				 * mapped in at CS0.
 				 */
-				reg = <0x00000000 0x800000>;
+				reg = <0 0x00000000 0x800000>;
 
 				partitions {
 					compatible = "redboot-fis";
diff --git a/arch/arm/boot/dts/intel-ixp42x-welltech-epbx100.dts b/arch/arm/boot/dts/intel-ixp42x-welltech-epbx100.dts
index 220605e297c3..f5846a50e4d4 100644
--- a/arch/arm/boot/dts/intel-ixp42x-welltech-epbx100.dts
+++ b/arch/arm/boot/dts/intel-ixp42x-welltech-epbx100.dts
@@ -29,14 +29,14 @@
 	};
 
 	soc {
-		bus@50000000 {
-			flash@0 {
+		bus@c4000000 {
+			flash@0,0 {
 				compatible = "intel,ixp4xx-flash", "cfi-flash";
 				bank-width = <2>;
 				/*
 				 * 16 MB of Flash
 				 */
-				reg = <0x00000000 0x1000000>;
+				reg = <0 0x00000000 0x1000000>;
 
 				partitions {
 					compatible = "fixed-partitions";
diff --git a/arch/arm/boot/dts/intel-ixp42x.dtsi b/arch/arm/boot/dts/intel-ixp42x.dtsi
index 5fa063ed396c..d0e0f8afb7c9 100644
--- a/arch/arm/boot/dts/intel-ixp42x.dtsi
+++ b/arch/arm/boot/dts/intel-ixp42x.dtsi
@@ -7,6 +7,11 @@
 
 / {
 	soc {
+		bus@c4000000 {
+			compatible = "intel,ixp42x-expansion-bus-controller", "syscon";
+			reg = <0xc4000000 0x28>;
+		};
+
 		pci@c0000000 {
 			compatible = "intel,ixp42x-pci";
 		};
diff --git a/arch/arm/boot/dts/intel-ixp43x-gateworks-gw2358.dts b/arch/arm/boot/dts/intel-ixp43x-gateworks-gw2358.dts
index f5fe309f7762..1a2f9a808270 100644
--- a/arch/arm/boot/dts/intel-ixp43x-gateworks-gw2358.dts
+++ b/arch/arm/boot/dts/intel-ixp43x-gateworks-gw2358.dts
@@ -77,15 +77,17 @@
 	};
 
 	soc {
-		bus@50000000 {
-			flash@0 {
+		bus@c4000000 {
+			flash@0,0 {
 				compatible = "intel,ixp4xx-flash", "cfi-flash";
 				bank-width = <2>;
+				/* Enable writes on the expansion bus */
+				intel,ixp4xx-eb-write-enable = <1>;
 				/*
 				 * 32 MB of Flash in 0x20000 byte blocks
-				 * mapped in at CS0.
+				 * mapped in at CS0 and CS1
 				 */
-				reg = <0x00000000 0x2000000>;
+				reg = <0 0x00000000 0x2000000>;
 
 				partitions {
 					compatible = "redboot-fis";
diff --git a/arch/arm/boot/dts/intel-ixp43x.dtsi b/arch/arm/boot/dts/intel-ixp43x.dtsi
index 1d0817c6e3f9..60bf9903e0f8 100644
--- a/arch/arm/boot/dts/intel-ixp43x.dtsi
+++ b/arch/arm/boot/dts/intel-ixp43x.dtsi
@@ -8,6 +8,12 @@
 
 / {
 	soc {
+		bus@c4000000 {
+			compatible = "intel,ixp43x-expansion-bus-controller", "syscon";
+			/* Uses at least up to 0x230 */
+			reg = <0xc4000000 0x1000>;
+		};
+
 		pci@c0000000 {
 			compatible = "intel,ixp43x-pci";
 		};
diff --git a/arch/arm/boot/dts/intel-ixp45x-ixp46x.dtsi b/arch/arm/boot/dts/intel-ixp45x-ixp46x.dtsi
index cce49e809043..b6ff614dadc6 100644
--- a/arch/arm/boot/dts/intel-ixp45x-ixp46x.dtsi
+++ b/arch/arm/boot/dts/intel-ixp45x-ixp46x.dtsi
@@ -9,6 +9,17 @@
 
 / {
 	soc {
+		bus@c4000000 {
+			compatible = "intel,ixp46x-expansion-bus-controller", "syscon";
+			/* Uses at least up to 0x124 */
+			reg = <0xc4000000 0x1000>;
+		};
+
+		rng@70002100 {
+			compatible = "intel,ixp46x-rng";
+			reg = <0x70002100 4>;
+		};
+
 		interrupt-controller@c8003000 {
 			compatible = "intel,ixp43x-interrupt";
 		};
diff --git a/arch/arm/boot/dts/intel-ixp4xx.dtsi b/arch/arm/boot/dts/intel-ixp4xx.dtsi
index 45cb3ad954c1..e5af2d463074 100644
--- a/arch/arm/boot/dts/intel-ixp4xx.dtsi
+++ b/arch/arm/boot/dts/intel-ixp4xx.dtsi
@@ -15,16 +15,30 @@
 		interrupt-parent = <&intcon>;
 
 		/*
-		 * The IXP4xx expansion bus is a set of 16 or 32MB
-		 * windows in the 256MB space from 0x50000000 to
-		 * 0x5fffffff.
+		 * The IXP4xx expansion bus is a set of up to 7 each up to 16MB
+		 * windows in the 256MB space from 0x50000000 to 0x5fffffff.
 		 */
-		bus@50000000 {
-			compatible = "simple-bus";
-			#address-cells = <1>;
+		bus@c4000000 {
+			/* compatible and reg filled in by per-soc device tree */
+			native-endian;
+			#address-cells = <2>;
 			#size-cells = <1>;
-			ranges = <0x00000000 0x50000000 0x10000000>;
-			dma-ranges = <0x00000000 0x50000000 0x10000000>;
+			ranges = <0 0x0 0x50000000 0x01000000>,
+				 <1 0x0 0x51000000 0x01000000>,
+				 <2 0x0 0x52000000 0x01000000>,
+				 <3 0x0 0x53000000 0x01000000>,
+				 <4 0x0 0x54000000 0x01000000>,
+				 <5 0x0 0x55000000 0x01000000>,
+				 <6 0x0 0x56000000 0x01000000>,
+				 <7 0x0 0x57000000 0x01000000>;
+			dma-ranges = <0 0x0 0x50000000 0x01000000>,
+				 <1 0x0 0x51000000 0x01000000>,
+				 <2 0x0 0x52000000 0x01000000>,
+				 <3 0x0 0x53000000 0x01000000>,
+				 <4 0x0 0x54000000 0x01000000>,
+				 <5 0x0 0x55000000 0x01000000>,
+				 <6 0x0 0x56000000 0x01000000>,
+				 <7 0x0 0x57000000 0x01000000>;
 		};
 
 		qmgr: queue-manager@60000000 {