Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (27 commits)
  x86: Clean up apic.c and apic.h
  x86: Remove superflous goal definition of tsc_sync
  x86: dt: Correct local apic documentation in device tree bindings
  x86: dt: Cleanup local apic setup
  x86: dt: Fix OLPC=y/INTEL_CE=n build
  rtc: cmos: Add OF bindings
  x86: ce4100: Use OF to setup devices
  x86: ioapic: Add OF bindings for IO_APIC
  x86: dtb: Add generic bus probe
  x86: dtb: Add support for PCI devices backed by dtb nodes
  x86: dtb: Add device tree support for HPET
  x86: dtb: Add early parsing of IO_APIC
  x86: dtb: Add irq domain abstraction
  x86: dtb: Add a device tree for CE4100
  x86: Add device tree support
  x86: e820: Remove conditional early mapping in parse_e820_ext
  x86: OLPC: Make OLPC=n build again
  x86: OLPC: Remove extra OLPC_OPENFIRMWARE_DT indirection
  x86: OLPC: Cleanup config maze completely
  x86: OLPC: Hide OLPC_OPENFIRMWARE config switch
  ...

Fix up conflicts in arch/x86/platform/ce4100/ce4100.c

56 files changed, 1478 insertions, 417 deletions

diff --git a/Documentation/devicetree/bindings/i2c/ce4100-i2c.txt b/Documentation/devicetree/bindings/i2c/ce4100-i2c.txt
new file mode 100644
index 00000000000..569b1624851
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/ce4100-i2c.txt
@@ -0,0 +1,93 @@
+CE4100 I2C
+----------
+
+CE4100 has one PCI device which is described as the I2C-Controller. This
+PCI device has three PCI-bars, each bar contains a complete I2C
+controller. So we have a total of three independent I2C-Controllers
+which share only an interrupt line.
+The driver is probed via the PCI-ID and is gathering the information of
+attached devices from the devices tree.
+Grant Likely recommended to use the ranges property to map the PCI-Bar
+number to its physical address and to use this to find the child nodes
+of the specific I2C controller. This were his exact words:
+
+       Here's where the magic happens.  Each entry in
+       ranges describes how the parent pci address space
+       (middle group of 3) is translated to the local
+       address space (first group of 2) and the size of
+       each range (last cell).  In this particular case,
+       the first cell of the local address is chosen to be
+       1:1 mapped to the BARs, and the second is the
+       offset from be base of the BAR (which would be
+       non-zero if you had 2 or more devices mapped off
+       the same BAR)
+
+       ranges allows the address mapping to be described
+       in a way that the OS can interpret without
+       requiring custom device driver code.
+
+This is an example which is used on FalconFalls:
+------------------------------------------------
+	i2c-controller@b,2 {
+		#address-cells = <2>;
+		#size-cells = <1>;
+		compatible = "pci8086,2e68.2",
+				"pci8086,2e68",
+				"pciclass,ff0000",
+				"pciclass,ff00";
+
+		reg = <0x15a00 0x0 0x0 0x0 0x0>;
+		interrupts = <16 1>;
+
+		/* as described by Grant, the first number in the group of
+		* three is the bar number followed by the 64bit bar address
+		* followed by size of the mapping. The bar address
+		* requires also a valid translation in parents ranges
+		* property.
+		*/
+		ranges = <0 0   0x02000000 0 0xdffe0500 0x100
+			  1 0   0x02000000 0 0xdffe0600 0x100
+			  2 0   0x02000000 0 0xdffe0700 0x100>;
+
+		i2c@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "intel,ce4100-i2c-controller";
+
+			/* The first number in the reg property is the
+			* number of the bar
+			*/
+			reg = <0 0 0x100>;
+
+			/* This I2C controller has no devices */
+		};
+
+		i2c@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "intel,ce4100-i2c-controller";
+			reg = <1 0 0x100>;
+
+			/* This I2C controller has one gpio controller */
+			gpio@26 {
+				#gpio-cells = <2>;
+				compatible = "ti,pcf8575";
+				reg = <0x26>;
+				gpio-controller;
+			};
+		};
+
+		i2c@2 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "intel,ce4100-i2c-controller";
+			reg = <2 0 0x100>;
+
+			gpio@26 {
+				#gpio-cells = <2>;
+				compatible = "ti,pcf8575";
+				reg = <0x26>;
+				gpio-controller;
+			};
+		};
+	};
diff --git a/Documentation/devicetree/bindings/rtc/rtc-cmos.txt b/Documentation/devicetree/bindings/rtc/rtc-cmos.txt
new file mode 100644
index 00000000000..7382989b305
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/rtc-cmos.txt
@@ -0,0 +1,28 @@
+ Motorola mc146818 compatible RTC
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Required properties:
+  - compatible : "motorola,mc146818"
+  - reg : should contain registers location and length.
+
+Optional properties:
+  - interrupts : should contain interrupt.
+  - interrupt-parent : interrupt source phandle.
+  - ctrl-reg : Contains the initial value of the control register also
+    called "Register B".
+  - freq-reg : Contains the initial value of the frequency register also
+    called "Regsiter A".
+
+"Register A" and "B" are usually initialized by the firmware (BIOS for
+instance). If this is not done, it can be performed by the driver.
+
+ISA Example:
+
+	rtc@70 {
+	         compatible = "motorola,mc146818";
+	         interrupts = <8 3>;
+	         interrupt-parent = <&ioapic1>;
+	         ctrl-reg = <2>;
+	         freq-reg = <0x26>;
+	         reg = <1 0x70 2>;
+	 };
diff --git a/Documentation/devicetree/bindings/x86/ce4100.txt b/Documentation/devicetree/bindings/x86/ce4100.txt
new file mode 100644
index 00000000000..b49ae593a60
--- /dev/null
+++ b/Documentation/devicetree/bindings/x86/ce4100.txt
@@ -0,0 +1,38 @@
+CE4100 Device Tree Bindings
+---------------------------
+
+The CE4100 SoC uses for in core peripherals the following compatible
+format: <vendor>,<chip>-<device>.
+Many of the "generic" devices like HPET or IO APIC have the ce4100
+name in their compatible property because they first appeared in this
+SoC.
+
+The CPU node
+------------
+	cpu@0 {
+		device_type = "cpu";
+		compatible = "intel,ce4100";
+		reg = <0>;
+		lapic = <&lapic0>;
+	};
+
+The reg property describes the CPU number. The lapic property points to
+the local APIC timer.
+
+The SoC node
+------------
+
+This node describes the in-core peripherals. Required property:
+  compatible = "intel,ce4100-cp";
+
+The PCI node
+------------
+This node describes the PCI bus on the SoC. Its property should be
+  compatible = "intel,ce4100-pci", "pci";
+
+If the OS is using the IO-APIC for interrupt routing then the reported
+interrupt numbers for devices is no longer true. In order to obtain the
+correct interrupt number, the child node which represents the device has
+to contain the interrupt property. Besides the interrupt property it has
+to contain at least the reg property containing the PCI bus address and
+compatible property according to "PCI Bus Binding Revision 2.1".
diff --git a/Documentation/devicetree/bindings/x86/interrupt.txt b/Documentation/devicetree/bindings/x86/interrupt.txt
new file mode 100644
index 00000000000..7d19f494f19
--- /dev/null
+++ b/Documentation/devicetree/bindings/x86/interrupt.txt
@@ -0,0 +1,26 @@
+Interrupt chips
+---------------
+
+* Intel I/O Advanced Programmable Interrupt Controller (IO APIC)
+
+  Required properties:
+  --------------------
+     compatible = "intel,ce4100-ioapic";
+     #interrupt-cells = <2>;
+
+  Device's interrupt property:
+
+     interrupts = <P S>;
+
+  The first number (P) represents the interrupt pin which is wired to the
+  IO APIC. The second number (S) represents the sense of interrupt which
+  should be configured and can be one of:
+    0 - Edge Rising
+    1 - Level Low
+    2 - Level High
+    3 - Edge Falling
+
+* Local APIC
+  Required property:
+
+     compatible = "intel,ce4100-lapic";
diff --git a/Documentation/devicetree/bindings/x86/timer.txt b/Documentation/devicetree/bindings/x86/timer.txt
new file mode 100644
index 00000000000..c688af58e3b
--- /dev/null
+++ b/Documentation/devicetree/bindings/x86/timer.txt
@@ -0,0 +1,6 @@
+Timers
+------
+
+* High Precision Event Timer (HPET)
+  Required property:
+     compatible = "intel,ce4100-hpet";
diff --git a/Documentation/devicetree/booting-without-of.txt b/Documentation/devicetree/booting-without-of.txt
index 28b1c9d3d35..55fd2623445 100644
--- a/Documentation/devicetree/booting-without-of.txt
+++ b/Documentation/devicetree/booting-without-of.txt
@@ -13,6 +13,7 @@ Table of Contents
 
   I - Introduction
     1) Entry point for arch/powerpc
+    2) Entry point for arch/x86
 
   II - The DT block format
     1) Header
@@ -225,6 +226,25 @@ it with special cases.
   cannot support both configurations with Book E and configurations
   with classic Powerpc architectures.
 
+2) Entry point for arch/x86
+-------------------------------
+
+  There is one single 32bit entry point to the kernel at code32_start,
+  the decompressor (the real mode entry point goes to the same  32bit
+  entry point once it switched into protected mode). That entry point
+  supports one calling convention which is documented in
+  Documentation/x86/boot.txt
+  The physical pointer to the device-tree block (defined in chapter II)
+  is passed via setup_data which requires at least boot protocol 2.09.
+  The type filed is defined as
+
+  #define SETUP_DTB                      2
+
+  This device-tree is used as an extension to the "boot page". As such it
+  does not parse / consider data which is already covered by the boot
+  page. This includes memory size, reserved ranges, command line arguments
+  or initrd address. It simply holds information which can not be retrieved
+  otherwise like interrupt routing or a list of devices behind an I2C bus.
 
 II - The DT block format
 ========================
diff --git a/arch/microblaze/include/asm/pci-bridge.h b/arch/microblaze/include/asm/pci-bridge.h
index 0c68764ab54..10717669e0c 100644
--- a/arch/microblaze/include/asm/pci-bridge.h
+++ b/arch/microblaze/include/asm/pci-bridge.h
@@ -104,11 +104,22 @@ struct pci_controller {
 	int global_number;	/* PCI domain number */
 };
 
+#ifdef CONFIG_PCI
 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
 {
 	return bus->sysdata;
 }
 
+static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
+{
+	struct pci_controller *host;
+
+	if (bus->self)
+		return pci_device_to_OF_node(bus->self);
+	host = pci_bus_to_host(bus);
+	return host ? host->dn : NULL;
+}
+
 static inline int isa_vaddr_is_ioport(void __iomem *address)
 {
 	/* No specific ISA handling on ppc32 at this stage, it
@@ -116,6 +127,7 @@ static inline int isa_vaddr_is_ioport(void __iomem *address)
 	 */
 	return 0;
 }
+#endif /* CONFIG_PCI */
 
 /* These are used for config access before all the PCI probing
    has been done. */
diff --git a/arch/microblaze/include/asm/prom.h b/arch/microblaze/include/asm/prom.h
index 2e72af078b0..d0890d36ef6 100644
--- a/arch/microblaze/include/asm/prom.h
+++ b/arch/microblaze/include/asm/prom.h
@@ -64,21 +64,6 @@ extern void kdump_move_device_tree(void);
 /* CPU OF node matching */
 struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
 
-/**
- * of_irq_map_pci - Resolve the interrupt for a PCI device
- * @pdev:	the device whose interrupt is to be resolved
- * @out_irq:	structure of_irq filled by this function
- *
- * This function resolves the PCI interrupt for a given PCI device. If a
- * device-node exists for a given pci_dev, it will use normal OF tree
- * walking. If not, it will implement standard swizzling and walk up the
- * PCI tree until an device-node is found, at which point it will finish
- * resolving using the OF tree walking.
- */
-struct pci_dev;
-struct of_irq;
-extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
-
 #endif /* __ASSEMBLY__ */
 #endif /* __KERNEL__ */
 
diff --git a/arch/microblaze/kernel/prom_parse.c b/arch/microblaze/kernel/prom_parse.c
index 9ae24f4b882..47187cc2cf0 100644
--- a/arch/microblaze/kernel/prom_parse.c
+++ b/arch/microblaze/kernel/prom_parse.c
@@ -2,88 +2,11 @@
 
 #include <linux/kernel.h>
 #include <linux/string.h>
-#include <linux/pci_regs.h>
 #include <linux/module.h>
 #include <linux/ioport.h>
 #include <linux/etherdevice.h>
 #include <linux/of_address.h>
 #include <asm/prom.h>
-#include <asm/pci-bridge.h>
-
-#ifdef CONFIG_PCI
-int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
-{
-	struct device_node *dn, *ppnode;
-	struct pci_dev *ppdev;
-	u32 lspec;
-	u32 laddr[3];
-	u8 pin;
-	int rc;
-
-	/* Check if we have a device node, if yes, fallback to standard OF
-	 * parsing
-	 */
-	dn = pci_device_to_OF_node(pdev);
-	if (dn)
-		return of_irq_map_one(dn, 0, out_irq);
-
-	/* Ok, we don't, time to have fun. Let's start by building up an
-	 * interrupt spec.  we assume #interrupt-cells is 1, which is standard
-	 * for PCI. If you do different, then don't use that routine.
-	 */
-	rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
-	if (rc != 0)
-		return rc;
-	/* No pin, exit */
-	if (pin == 0)
-		return -ENODEV;
-
-	/* Now we walk up the PCI tree */
-	lspec = pin;
-	for (;;) {
-		/* Get the pci_dev of our parent */
-		ppdev = pdev->bus->self;
-
-		/* Ouch, it's a host bridge... */
-		if (ppdev == NULL) {
-			struct pci_controller *host;
-			host = pci_bus_to_host(pdev->bus);
-			ppnode = host ? host->dn : NULL;
-			/* No node for host bridge ? give up */
-			if (ppnode == NULL)
-				return -EINVAL;
-		} else
-			/* We found a P2P bridge, check if it has a node */
-			ppnode = pci_device_to_OF_node(ppdev);
-
-		/* Ok, we have found a parent with a device-node, hand over to
-		 * the OF parsing code.
-		 * We build a unit address from the linux device to be used for
-		 * resolution. Note that we use the linux bus number which may
-		 * not match your firmware bus numbering.
-		 * Fortunately, in most cases, interrupt-map-mask doesn't
-		 * include the bus number as part of the matching.
-		 * You should still be careful about that though if you intend
-		 * to rely on this function (you ship  a firmware that doesn't
-		 * create device nodes for all PCI devices).
-		 */
-		if (ppnode)
-			break;
-
-		/* We can only get here if we hit a P2P bridge with no node,
-		 * let's do standard swizzling and try again
-		 */
-		lspec = pci_swizzle_interrupt_pin(pdev, lspec);
-		pdev = ppdev;
-	}
-
-	laddr[0] = (pdev->bus->number << 16)
-		| (pdev->devfn << 8);
-	laddr[1]  = laddr[2] = 0;
-	return of_irq_map_raw(ppnode, &lspec, 1, laddr, out_irq);
-}
-EXPORT_SYMBOL_GPL(of_irq_map_pci);
-#endif /* CONFIG_PCI */
 
 void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
 		unsigned long *busno, unsigned long *phys, unsigned long *size)
diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c
index e363615d679..1e01a125363 100644
--- a/arch/microblaze/pci/pci-common.c
+++ b/arch/microblaze/pci/pci-common.c
@@ -29,6 +29,7 @@
 #include <linux/slab.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
+#include <linux/of_pci.h>
 
 #include <asm/processor.h>
 #include <asm/io.h>
diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index 51e9e6f90d1..edeb80fdd2c 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -171,6 +171,16 @@ static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
 	return bus->sysdata;
 }
 
+static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
+{
+	struct pci_controller *host;
+
+	if (bus->self)
+		return pci_device_to_OF_node(bus->self);
+	host = pci_bus_to_host(bus);
+	return host ? host->dn : NULL;
+}
+
 static inline int isa_vaddr_is_ioport(void __iomem *address)
 {
 	/* No specific ISA handling on ppc32 at this stage, it
diff --git a/arch/powerpc/include/asm/prom.h b/arch/powerpc/include/asm/prom.h
index d7275758559..c189aa5fe1f 100644
--- a/arch/powerpc/include/asm/prom.h
+++ b/arch/powerpc/include/asm/prom.h
@@ -70,21 +70,6 @@ static inline int of_node_to_nid(struct device_node *device) { return 0; }
 #endif
 #define of_node_to_nid of_node_to_nid
 
-/**
- * of_irq_map_pci - Resolve the interrupt for a PCI device
- * @pdev:	the device whose interrupt is to be resolved
- * @out_irq:	structure of_irq filled by this function
- *
- * This function resolves the PCI interrupt for a given PCI device. If a
- * device-node exists for a given pci_dev, it will use normal OF tree
- * walking. If not, it will implement standard swizzling and walk up the
- * PCI tree until an device-node is found, at which point it will finish
- * resolving using the OF tree walking.
- */
-struct pci_dev;
-struct of_irq;
-extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
-
 extern void of_instantiate_rtc(void);
 
 /* These includes are put at the bottom because they may contain things
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 10a44e68ef1..eb341be9a4d 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -22,6 +22,7 @@
 #include <linux/init.h>
 #include <linux/bootmem.h>
 #include <linux/of_address.h>
+#include <linux/of_pci.h>
 #include <linux/mm.h>
 #include <linux/list.h>
 #include <linux/syscalls.h>
diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c
index c2b7a07cc3d..47187cc2cf0 100644
--- a/arch/powerpc/kernel/prom_parse.c
+++ b/arch/powerpc/kernel/prom_parse.c
@@ -2,95 +2,11 @@
 
 #include <linux/kernel.h>
 #include <linux/string.h>
-#include <linux/pci_regs.h>
 #include <linux/module.h>
 #include <linux/ioport.h>
 #include <linux/etherdevice.h>
 #include <linux/of_address.h>
 #include <asm/prom.h>
-#include <asm/pci-bridge.h>
-
-#ifdef CONFIG_PCI
-int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
-{
-	struct device_node *dn, *ppnode;
-	struct pci_dev *ppdev;
-	u32 lspec;
-	u32 laddr[3];
-	u8 pin;
-	int rc;
-
-	/* Check if we have a device node, if yes, fallback to standard OF
-	 * parsing
-	 */
-	dn = pci_device_to_OF_node(pdev);
-	if (dn) {
-		rc = of_irq_map_one(dn, 0, out_irq);
-		if (!rc)
-			return rc;
-	}
-
-	/* Ok, we don't, time to have fun. Let's start by building up an
-	 * interrupt spec.  we assume #interrupt-cells is 1, which is standard
-	 * for PCI. If you do different, then don't use that routine.
-	 */
-	rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
-	if (rc != 0)
-		return rc;
-	/* No pin, exit */
-	if (pin == 0)
-		return -ENODEV;
-
-	/* Now we walk up the PCI tree */
-	lspec = pin;
-	for (;;) {
-		/* Get the pci_dev of our parent */
-		ppdev = pdev->bus->self;
-
-		/* Ouch, it's a host bridge... */
-		if (ppdev == NULL) {
-#ifdef CONFIG_PPC64
-			ppnode = pci_bus_to_OF_node(pdev->bus);
-#else
-			struct pci_controller *host;
-			host = pci_bus_to_host(pdev->bus);
-			ppnode = host ? host->dn : NULL;
-#endif
-			/* No node for host bridge ? give up */
-			if (ppnode == NULL)
-				return -EINVAL;
-		} else
-			/* We found a P2P bridge, check if it has a node */
-			ppnode = pci_device_to_OF_node(ppdev);
-
-		/* Ok, we have found a parent with a device-node, hand over to
-		 * the OF parsing code.
-		 * We build a unit address from the linux device to be used for
-		 * resolution. Note that we use the linux bus number which may
-		 * not match your firmware bus numbering.
-		 * Fortunately, in most cases, interrupt-map-mask doesn't include
-		 * the bus number as part of the matching.
-		 * You should still be careful about that though if you intend
-		 * to rely on this function (you ship  a firmware that doesn't
-		 * create device nodes for all PCI devices).
-		 */
-		if (ppnode)
-			break;
-
-		/* We can only get here if we hit a P2P bridge with no node,
-		 * let's do standard swizzling and try again
-		 */
-		lspec = pci_swizzle_interrupt_pin(pdev, lspec);
-		pdev = ppdev;
-	}
-
-	laddr[0] = (pdev->bus->number << 16)
-		| (pdev->devfn << 8);
-	laddr[1]  = laddr[2] = 0;
-	return of_irq_map_raw(ppnode, &lspec, 1, laddr, out_irq);
-}
-EXPORT_SYMBOL_GPL(of_irq_map_pci);
-#endif /* CONFIG_PCI */
 
 void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
 		unsigned long *busno, unsigned long *phys, unsigned long *size)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 159c2ff9c12..f8958b01b97 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -386,6 +386,8 @@ config X86_INTEL_CE
 	depends on X86_32
 	depends on X86_EXTENDED_PLATFORM
 	select X86_REBOOTFIXUPS
+	select OF
+	select OF_EARLY_FLATTREE
 	---help---
 	  Select for the Intel CE media processor (CE4100) SOC.
 	  This option compiles in support for the CE4100 SOC for settop
@@ -2070,9 +2072,10 @@ config SCx200HR_TIMER
 
 config OLPC
 	bool "One Laptop Per Child support"
+	depends on !X86_PAE
 	select GPIOLIB
-	select OLPC_OPENFIRMWARE
-	depends on !X86_64 && !X86_PAE
+	select OF
+	select OF_PROMTREE if PROC_DEVICETREE
 	---help---
 	  Add support for detecting the unique features of the OLPC
 	  XO hardware.
@@ -2083,21 +2086,6 @@ config OLPC_XO1
 	---help---
 	  Add support for non-essential features of the OLPC XO-1 laptop.
 
-config OLPC_OPENFIRMWARE
-	bool "Support for OLPC's Open Firmware"
-	depends on !X86_64 && !X86_PAE
-	default n
-	select OF
-	help
-	  This option adds support for the implementation of Open Firmware
-	  that is used on the OLPC XO-1 Children's Machine.
-	  If unsure, say N here.
-
-config OLPC_OPENFIRMWARE_DT
-	bool
-	default y if OLPC_OPENFIRMWARE && PROC_DEVICETREE
-	select OF_PROMTREE
-
 endif # X86_32
 
 config AMD_NB
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index b8a3484d69e..a279d98ea95 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -220,7 +220,6 @@ extern void enable_IR_x2apic(void);
 
 extern int get_physical_broadcast(void);
 
-extern void apic_disable(void);
 extern int lapic_get_maxlvt(void);
 extern void clear_local_APIC(void);
 extern void connect_bsp_APIC(void);
@@ -228,7 +227,6 @@ extern void disconnect_bsp_APIC(int virt_wire_setup);
 extern void disable_local_APIC(void);
 extern void lapic_shutdown(void);
 extern int verify_local_APIC(void);
-extern void cache_APIC_registers(void);
 extern void sync_Arb_IDs(void);
 extern void init_bsp_APIC(void);
 extern void setup_local_APIC(void);
@@ -239,8 +237,7 @@ void register_lapic_address(unsigned long address);
 extern void setup_boot_APIC_clock(void);
 extern void setup_secondary_APIC_clock(void);
 extern int APIC_init_uniprocessor(void);
-extern void enable_NMI_through_LVT0(void);
-extern int apic_force_enable(void);
+extern int apic_force_enable(unsigned long addr);
 
 /*
  * On 32bit this is mach-xxx local
@@ -261,7 +258,6 @@ static inline void lapic_shutdown(void) { }
 #define local_apic_timer_c2_ok		1
 static inline void init_apic_mappings(void) { }
 static inline void disable_local_APIC(void) { }
-static inline void apic_disable(void) { }
 # define setup_boot_APIC_clock x86_init_noop
 # define setup_secondary_APIC_clock x86_init_noop
 #endif /* !CONFIG_X86_LOCAL_APIC */
diff --git a/arch/x86/include/asm/bootparam.h b/arch/x86/include/asm/bootparam.h
index c8bfe63a06d..e020d88ec02 100644
--- a/arch/x86/include/asm/bootparam.h
+++ b/arch/x86/include/asm/bootparam.h
@@ -12,6 +12,7 @@
 /* setup data types */
 #define SETUP_NONE			0
 #define SETUP_E820_EXT			1
+#define SETUP_DTB			2
 
 /* extensible setup data list node */
 struct setup_data {
diff --git a/arch/x86/include/asm/e820.h b/arch/x86/include/asm/e820.h
index e99d55d74df..908b96957d8 100644
--- a/arch/x86/include/asm/e820.h
+++ b/arch/x86/include/asm/e820.h
@@ -96,7 +96,7 @@ extern void e820_setup_gap(void);
 extern int e820_search_gap(unsigned long *gapstart, unsigned long *gapsize,
 			unsigned long start_addr, unsigned long long end_addr);
 struct setup_data;
-extern void parse_e820_ext(struct setup_data *data, unsigned long pa_data);
+extern void parse_e820_ext(struct setup_data *data);
 
 #if defined(CONFIG_X86_64) || \
 	(defined(CONFIG_X86_32) && defined(CONFIG_HIBERNATION))
diff --git a/arch/x86/include/asm/irq.h b/arch/x86/include/asm/irq.h
index c704b38c57a..ba870bb6dd8 100644
--- a/arch/x86/include/asm/irq.h
+++ b/arch/x86/include/asm/irq.h
@@ -10,9 +10,6 @@
 #include <asm/apicdef.h>
 #include <asm/irq_vectors.h>
 
-/* Even though we don't support this, supply it to appease OF */
-static inline void irq_dispose_mapping(unsigned int virq) { }
-
 static inline int irq_canonicalize(int irq)
 {
 	return ((irq == 2) ? 9 : irq);
diff --git a/arch/x86/include/asm/irq_controller.h b/arch/x86/include/asm/irq_controller.h
new file mode 100644
index 00000000000..423bbbddf36
--- /dev/null
+++ b/arch/x86/include/asm/irq_controller.h
@@ -0,0 +1,12 @@
+#ifndef __IRQ_CONTROLLER__
+#define __IRQ_CONTROLLER__
+
+struct irq_domain {
+	int (*xlate)(struct irq_domain *h, const u32 *intspec, u32 intsize,
+			u32 *out_hwirq, u32 *out_type);
+	void *priv;
+	struct device_node *controller;
+	struct list_head l;
+};
+
+#endif
diff --git a/arch/x86/include/asm/olpc_ofw.h b/arch/x86/include/asm/olpc_ofw.h
index 641988efe06..c5d3a5abbb9 100644
--- a/arch/x86/include/asm/olpc_ofw.h
+++ b/arch/x86/include/asm/olpc_ofw.h
@@ -6,7 +6,7 @@
 
 #define OLPC_OFW_SIG 0x2057464F	/* aka "OFW " */
 
-#ifdef CONFIG_OLPC_OPENFIRMWARE
+#ifdef CONFIG_OLPC
 
 extern bool olpc_ofw_is_installed(void);
 
@@ -26,19 +26,15 @@ extern void setup_olpc_ofw_pgd(void);
 /* check if OFW was detected during boot */
 extern bool olpc_ofw_present(void);
 
-#else /* !CONFIG_OLPC_OPENFIRMWARE */
-
-static inline bool olpc_ofw_is_installed(void) { return false; }
+#else /* !CONFIG_OLPC */
 static inline void olpc_ofw_detect(void) { }
 static inline void setup_olpc_ofw_pgd(void) { }
-static inline bool olpc_ofw_present(void) { return false; }
-
-#endif /* !CONFIG_OLPC_OPENFIRMWARE */
+#endif /* !CONFIG_OLPC */
 
-#ifdef CONFIG_OLPC_OPENFIRMWARE_DT
+#ifdef CONFIG_OF_PROMTREE
 extern void olpc_dt_build_devicetree(void);
 #else
 static inline void olpc_dt_build_devicetree(void) { }
-#endif /* CONFIG_OLPC_OPENFIRMWARE_DT */
+#endif
 
 #endif /* _ASM_X86_OLPC_OFW_H */
diff --git a/arch/x86/include/asm/prom.h b/arch/x86/include/asm/prom.h
index b4ec95f0751..971e0b46446 100644
--- a/arch/x86/include/asm/prom.h
+++ b/arch/x86/include/asm/prom.h
@@ -1 +1,69 @@
-/* dummy prom.h; here to make linux/of.h's #includes happy */
+/*
+ * Definitions for Device tree / OpenFirmware handling on X86
+ *
+ * based on arch/powerpc/include/asm/prom.h which is
+ *         Copyright (C) 1996-2005 Paul Mackerras.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _ASM_X86_PROM_H
+#define _ASM_X86_PROM_H
+#ifndef __ASSEMBLY__
+
+#include <linux/of.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+
+#include <asm/irq.h>
+#include <asm/atomic.h>
+#include <asm/setup.h>
+#include <asm/irq_controller.h>
+
+#ifdef CONFIG_OF
+extern int of_ioapic;
+extern u64 initial_dtb;
+extern void add_dtb(u64 data);
+extern void x86_add_irq_domains(void);
+void __cpuinit x86_of_pci_init(void);
+void x86_dtb_init(void);
+
+static inline struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
+{
+	return pdev ? pdev->dev.of_node : NULL;
+}
+
+static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
+{
+	return pci_device_to_OF_node(bus->self);
+}
+
+#else
+static inline void add_dtb(u64 data) { }
+static inline void x86_add_irq_domains(void) { }
+static inline void x86_of_pci_init(void) { }
+static inline void x86_dtb_init(void) { }
+#define of_ioapic 0
+#endif
+
+extern char cmd_line[COMMAND_LINE_SIZE];
+
+#define pci_address_to_pio pci_address_to_pio
+unsigned long pci_address_to_pio(phys_addr_t addr);
+
+/**
+ * irq_dispose_mapping - Unmap an interrupt
+ * @virq: linux virq number of the interrupt to unmap
+ *
+ * FIXME: We really should implement proper virq handling like power,
+ * but that's going to be major surgery.
+ */
+static inline void irq_dispose_mapping(unsigned int virq) { }
+
+#define HAVE_ARCH_DEVTREE_FIXUPS
+
+#endif /* __ASSEMBLY__ */
+#endif
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index 64642ad019f..643ebf2e2ad 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -83,11 +83,13 @@ struct x86_init_paging {
  *				boot cpu
  * @tsc_pre_init:		platform function called before TSC init
  * @timer_init:			initialize the platform timer (default PIT/HPET)
+ * @wallclock_init:		init the wallclock device
  */
 struct x86_init_timers {
 	void (*setup_percpu_clockev)(void);
 	void (*tsc_pre_init)(void);
 	void (*timer_init)(void);
+	void (*wallclock_init)(void);
 };
 
 /**
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 34244b2cd88..62445ba2f8a 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -66,9 +66,9 @@ obj-$(CONFIG_PCI)		+= early-quirks.o
 apm-y				:= apm_32.o
 obj-$(CONFIG_APM)		+= apm.o
 obj-$(CONFIG_SMP)		+= smp.o
-obj-$(CONFIG_SMP)		+= smpboot.o tsc_sync.o
+obj-$(CONFIG_SMP)		+= smpboot.o
+obj-$(CONFIG_SMP)		+= tsc_sync.o
 obj-$(CONFIG_SMP)		+= setup_percpu.o
-obj-$(CONFIG_X86_64_SMP)	+= tsc_sync.o
 obj-$(CONFIG_X86_TRAMPOLINE)	+= trampoline_$(BITS).o
 obj-$(CONFIG_X86_MPPARSE)	+= mpparse.o
 obj-y				+= apic/
@@ -109,6 +109,7 @@ obj-$(CONFIG_MICROCODE)			+= microcode.o
 obj-$(CONFIG_X86_CHECK_BIOS_CORRUPTION) += check.o
 
 obj-$(CONFIG_SWIOTLB)			+= pci-swiotlb.o
+obj-$(CONFIG_OF)			+= devicetree.o
 
 ###
 # 64 bit specific files
diff --git a/arch/x86/kernel/apb_timer.c b/arch/x86/kernel/apb_timer.c
index 51d4e166306..1293c709ee8 100644
--- a/arch/x86/kernel/apb_timer.c
+++ b/arch/x86/kernel/apb_timer.c
@@ -508,64 +508,12 @@ static int apbt_next_event(unsigned long delta,
 	return 0;
 }
 
-/*
- * APB timer clock is not in sync with pclk on Langwell, which translates to
- * unreliable read value caused by sampling error. the error does not add up
- * overtime and only happens when sampling a 0 as a 1 by mistake. so the time
- * would go backwards. the following code is trying to prevent time traveling
- * backwards. little bit paranoid.
- */
 static cycle_t apbt_read_clocksource(struct clocksource *cs)
 {
-	unsigned long t0, t1, t2;
-	static unsigned long last_read;
-
-bad_count:
-	t1 = apbt_readl(phy_cs_timer_id,
-			APBTMR_N_CURRENT_VALUE);
-	t2 = apbt_readl(phy_cs_timer_id,
-			APBTMR_N_CURRENT_VALUE);
-	if (unlikely(t1 < t2)) {
-		pr_debug("APBT: read current count error %lx:%lx:%lx\n",
-			 t1, t2, t2 - t1);
-		goto bad_count;
-	}
-	/*
-	 * check against cached last read, makes sure time does not go back.
-	 * it could be a normal rollover but we will do tripple check anyway
-	 */
-	if (unlikely(t2 > last_read)) {
-		/* check if we have a normal rollover */
-		unsigned long raw_intr_status =
-			apbt_readl_reg(APBTMRS_RAW_INT_STATUS);
-		/*
-		 * cs timer interrupt is masked but raw intr bit is set if
-		 * rollover occurs. then we read EOI reg to clear it.
-		 */
-		if (raw_intr_status & (1 << phy_cs_timer_id)) {
-			apbt_readl(phy_cs_timer_id, APBTMR_N_EOI);
-			goto out;
-		}
-		pr_debug("APB CS going back %lx:%lx:%lx ",
-			 t2, last_read, t2 - last_read);
-bad_count_x3:
-		pr_debug("triple check enforced\n");
-		t0 = apbt_readl(phy_cs_timer_id,
-				APBTMR_N_CURRENT_VALUE);
-		udelay(1);
-		t1 = apbt_readl(phy_cs_timer_id,
-				APBTMR_N_CURRENT_VALUE);
-		udelay(1);
-		t2 = apbt_readl(phy_cs_timer_id,
-				APBTMR_N_CURRENT_VALUE);
-		if ((t2 > t1) || (t1 > t0)) {
-			printk(KERN_ERR "Error: APB CS tripple check failed\n");
-			goto bad_count_x3;
-		}
-	}
-out:
-	last_read = t2;
-	return (cycle_t)~t2;
+	unsigned long current_count;
+
+	current_count = apbt_readl(phy_cs_timer_id, APBTMR_N_CURRENT_VALUE);
+	return (cycle_t)~current_count;
 }
 
 static int apbt_clocksource_register(void)
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 562a8325cc1..966673f4414 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -93,7 +93,7 @@ DEFINE_EARLY_PER_CPU(int, x86_cpu_to_logical_apicid, BAD_APICID);
  *
  * +1=force-enable
  */
-static int force_enable_local_apic;
+static int force_enable_local_apic __initdata;
 /*
  * APIC command line parameters
  */
@@ -163,7 +163,7 @@ early_param("nox2apic", setup_nox2apic);
 unsigned long mp_lapic_addr;
 int disable_apic;
 /* Disable local APIC timer from the kernel commandline or via dmi quirk */
-static int disable_apic_timer __cpuinitdata;
+static int disable_apic_timer __initdata;
 /* Local APIC timer works in C2 */
 int local_apic_timer_c2_ok;
 EXPORT_SYMBOL_GPL(local_apic_timer_c2_ok);
@@ -187,29 +187,8 @@ static struct resource lapic_resource = {
 
 static unsigned int calibration_result;
 
-static int lapic_next_event(unsigned long delta,
-			    struct clock_event_device *evt);
-static void lapic_timer_setup(enum clock_event_mode mode,
-			      struct clock_event_device *evt);
-static void lapic_timer_broadcast(const struct cpumask *mask);
 static void apic_pm_activate(void);
 
-/*
- * The local apic timer can be used for any function which is CPU local.
- */
-static struct clock_event_device lapic_clockevent = {
-	.name		= "lapic",
-	.features	= CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT
-			| CLOCK_EVT_FEAT_C3STOP | CLOCK_EVT_FEAT_DUMMY,
-	.shift		= 32,
-	.set_mode	= lapic_timer_setup,
-	.set_next_event	= lapic_next_event,
-	.broadcast	= lapic_timer_broadcast,
-	.rating		= 100,
-	.irq		= -1,
-};
-static DEFINE_PER_CPU(struct clock_event_device, lapic_events);
-
 static unsigned long apic_phys;
 
 /*
@@ -248,7 +227,7 @@ static int modern_apic(void)
  * right after this call apic become NOOP driven
  * so apic->write/read doesn't do anything
  */
-void apic_disable(void)
+static void __init apic_disable(void)
 {
 	pr_info("APIC: switched to apic NOOP\n");
 	apic = &apic_noop;
@@ -292,23 +271,6 @@ u64 native_apic_icr_read(void)
 	return icr1 | ((u64)icr2 << 32);
 }
 
-/**
- * enable_NMI_through_LVT0 - enable NMI through local vector table 0
- */
-void __cpuinit enable_NMI_through_LVT0(void)
-{
-	unsigned int v;
-
-	/* unmask and set to NMI */
-	v = APIC_DM_NMI;
-
-	/* Level triggered for 82489DX (32bit mode) */
-	if (!lapic_is_integrated())
-		v |= APIC_LVT_LEVEL_TRIGGER;
-
-	apic_write(APIC_LVT0, v);
-}
-
 #ifdef CONFIG_X86_32
 /**
  * get_physical_broadcast - Get number of physical broadcast IDs
@@ -518,6 +480,23 @@ static void lapic_timer_broadcast(const struct cpumask *mask)
 #endif
 }
 
+
+/*
+ * The local apic timer can be used for any function which is CPU local.
+ */
+static struct clock_event_device lapic_clockevent = {
+	.name		= "lapic",
+	.features	= CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT
+			| CLOCK_EVT_FEAT_C3STOP | CLOCK_EVT_FEAT_DUMMY,
+	.shift		= 32,
+	.set_mode	= lapic_timer_setup,
+	.set_next_event	= lapic_next_event,
+	.broadcast	= lapic_timer_broadcast,
+	.rating		= 100,
+	.irq		= -1,
+};
+static DEFINE_PER_CPU(struct clock_event_device, lapic_events);
+
 /*
  * Setup the local APIC timer for this CPU. Copy the initialized values
  * of the boot CPU and register the clock event in the framework.
@@ -1560,7 +1539,7 @@ static int __init detect_init_APIC(void)
 }
 #else
 
-static int apic_verify(void)
+static int __init apic_verify(void)
 {
 	u32 features, h, l;
 
@@ -1585,7 +1564,7 @@ static int apic_verify(void)
 	return 0;
 }
 
-int apic_force_enable(void)
+int __init apic_force_enable(unsigned long addr)
 {
 	u32 h, l;
 
@@ -1601,7 +1580,7 @@ int apic_force_enable(void)
 	if (!(l & MSR_IA32_APICBASE_ENABLE)) {
 		pr_info("Local APIC disabled by BIOS -- reenabling.\n");
 		l &= ~MSR_IA32_APICBASE_BASE;
-		l |= MSR_IA32_APICBASE_ENABLE | APIC_DEFAULT_PHYS_BASE;
+		l |= MSR_IA32_APICBASE_ENABLE | addr;
 		wrmsr(MSR_IA32_APICBASE, l, h);
 		enabled_via_apicbase = 1;
 	}
@@ -1642,7 +1621,7 @@ static int __init detect_init_APIC(void)
 				"you can enable it with \"lapic\"\n");
 			return -1;
 		}
-		if (apic_force_enable())
+		if (apic_force_enable(APIC_DEFAULT_PHYS_BASE))
 			return -1;
 	} else {
 		if (apic_verify())
diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
new file mode 100644
index 00000000000..7a8cebc9ff2
--- /dev/null
+++ b/arch/x86/kernel/devicetree.c
@@ -0,0 +1,441 @@
+/*
+ * Architecture specific OF callbacks.
+ */
+#include <linux/bootmem.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/of.h>
+#include <linux/of_fdt.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/of_irq.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/of_pci.h>
+
+#include <asm/hpet.h>
+#include <asm/irq_controller.h>
+#include <asm/apic.h>
+#include <asm/pci_x86.h>
+
+__initdata u64 initial_dtb;
+char __initdata cmd_line[COMMAND_LINE_SIZE];
+static LIST_HEAD(irq_domains);
+static DEFINE_RAW_SPINLOCK(big_irq_lock);
+
+int __initdata of_ioapic;
+
+#ifdef CONFIG_X86_IO_APIC
+static void add_interrupt_host(struct irq_domain *ih)
+{
+	unsigned long flags;
+
+	raw_spin_lock_irqsave(&big_irq_lock, flags);
+	list_add(&ih->l, &irq_domains);
+	raw_spin_unlock_irqrestore(&big_irq_lock, flags);
+}
+#endif
+
+static struct irq_domain *get_ih_from_node(struct device_node *controller)
+{
+	struct irq_domain *ih, *found = NULL;
+	unsigned long flags;
+
+	raw_spin_lock_irqsave(&big_irq_lock, flags);
+	list_for_each_entry(ih, &irq_domains, l) {
+		if (ih->controller ==  controller) {
+			found = ih;
+			break;
+		}
+	}
+	raw_spin_unlock_irqrestore(&big_irq_lock, flags);
+	return found;
+}
+
+unsigned int irq_create_of_mapping(struct device_node *controller,
+				   const u32 *intspec, unsigned int intsize)
+{
+	struct irq_domain *ih;
+	u32 virq, type;
+	int ret;
+
+	ih = get_ih_from_node(controller);
+	if (!ih)
+		return 0;
+	ret = ih->xlate(ih, intspec, intsize, &virq, &type);
+	if (ret)
+		return ret;
+	if (type == IRQ_TYPE_NONE)
+		return virq;
+	/* set the mask if it is different from current */
+	if (type == (irq_to_desc(virq)->status & IRQF_TRIGGER_MASK))
+		set_irq_type(virq, type);
+	return virq;
+}
+EXPORT_SYMBOL_GPL(irq_create_of_mapping);
+
+unsigned long pci_address_to_pio(phys_addr_t address)
+{
+	/*
+	 * The ioport address can be directly used by inX / outX
+	 */
+	BUG_ON(address >= (1 << 16));
+	return (unsigned long)address;
+}
+EXPORT_SYMBOL_GPL(pci_address_to_pio);
+
+void __init early_init_dt_scan_chosen_arch(unsigned long node)
+{
+	BUG();
+}
+
+void __init early_init_dt_add_memory_arch(u64 base, u64 size)
+{
+	BUG();
+}
+
+void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
+{
+	return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
+}
+
+void __init add_dtb(u64 data)
+{
+	initial_dtb = data + offsetof(struct setup_data, data);
+}
+
+/*
+ * CE4100 ids. Will be moved to machine_device_initcall() once we have it.
+ */
+static struct of_device_id __initdata ce4100_ids[] = {
+	{ .compatible = "intel,ce4100-cp", },
+	{ .compatible = "isa", },
+	{ .compatible = "pci", },
+	{},
+};
+
+static int __init add_bus_probe(void)
+{
+	if (!of_have_populated_dt())
+		return 0;
+
+	return of_platform_bus_probe(NULL, ce4100_ids, NULL);
+}
+module_init(add_bus_probe);
+
+#ifdef CONFIG_PCI
+static int x86_of_pci_irq_enable(struct pci_dev *dev)
+{
+	struct of_irq oirq;
+	u32 virq;
+	int ret;
+	u8 pin;
+
+	ret = pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
+	if (ret)
+		return ret;
+	if (!pin)
+		return 0;
+
+	ret = of_irq_map_pci(dev, &oirq);
+	if (ret)
+		return ret;
+
+	virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
+			oirq.size);
+	if (virq == 0)
+		return -EINVAL;
+	dev->irq = virq;
+	return 0;
+}
+
+static void x86_of_pci_irq_disable(struct pci_dev *dev)
+{
+}
+
+void __cpuinit x86_of_pci_init(void)
+{
+	struct device_node *np;
+
+	pcibios_enable_irq = x86_of_pci_irq_enable;
+	pcibios_disable_irq = x86_of_pci_irq_disable;
+
+	for_each_node_by_type(np, "pci") {
+		const void *prop;
+		struct pci_bus *bus;
+		unsigned int bus_min;
+		struct device_node *child;
+
+		prop = of_get_property(np, "bus-range", NULL);
+		if (!prop)
+			continue;
+		bus_min = be32_to_cpup(prop);
+
+		bus = pci_find_bus(0, bus_min);
+		if (!bus) {
+			printk(KERN_ERR "Can't find a node for bus %s.\n",
+					np->full_name);
+			continue;
+		}
+
+		if (bus->self)
+			bus->self->dev.of_node = np;
+		else
+			bus->dev.of_node = np;
+
+		for_each_child_of_node(np, child) {
+			struct pci_dev *dev;
+			u32 devfn;
+
+			prop = of_get_property(child, "reg", NULL);
+			if (!prop)
+				continue;
+
+			devfn = (be32_to_cpup(prop) >> 8) & 0xff;
+			dev = pci_get_slot(bus, devfn);
+			if (!dev)
+				continue;
+			dev->dev.of_node = child;
+			pci_dev_put(dev);
+		}
+	}
+}
+#endif
+
+static void __init dtb_setup_hpet(void)
+{
+#ifdef CONFIG_HPET_TIMER
+	struct device_node *dn;
+	struct resource r;
+	int ret;
+
+	dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-hpet");
+	if (!dn)
+		return;
+	ret = of_address_to_resource(dn, 0, &r);
+	if (ret) {
+		WARN_ON(1);
+		return;
+	}
+	hpet_address = r.start;
+#endif
+}
+
+static void __init dtb_lapic_setup(void)
+{
+#ifdef CONFIG_X86_LOCAL_APIC
+	struct device_node *dn;
+	struct resource r;
+	int ret;
+
+	dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-lapic");
+	if (!dn)
+		return;
+
+	ret = of_address_to_resource(dn, 0, &r);
+	if (WARN_ON(ret))
+		return;
+
+	/* Did the boot loader setup the local APIC ? */
+	if (!cpu_has_apic) {
+		if (apic_force_enable(r.start))
+			return;
+	}
+	smp_found_config = 1;
+	pic_mode = 1;
+	register_lapic_address(r.start);
+	generic_processor_info(boot_cpu_physical_apicid,
+			       GET_APIC_VERSION(apic_read(APIC_LVR)));
+#endif
+}
+
+#ifdef CONFIG_X86_IO_APIC
+static unsigned int ioapic_id;
+
+static void __init dtb_add_ioapic(struct device_node *dn)
+{
+	struct resource r;
+	int ret;
+
+	ret = of_address_to_resource(dn, 0, &r);
+	if (ret) {
+		printk(KERN_ERR "Can't obtain address from node %s.\n",
+				dn->full_name);
+		return;
+	}
+	mp_register_ioapic(++ioapic_id, r.start, gsi_top);
+}
+
+static void __init dtb_ioapic_setup(void)
+{
+	struct device_node *dn;
+
+	for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
+		dtb_add_ioapic(dn);
+
+	if (nr_ioapics) {
+		of_ioapic = 1;
+		return;
+	}
+	printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
+}
+#else
+static void __init dtb_ioapic_setup(void) {}
+#endif
+
+static void __init dtb_apic_setup(void)
+{
+	dtb_lapic_setup();
+	dtb_ioapic_setup();
+}
+
+#ifdef CONFIG_OF_FLATTREE
+static void __init x86_flattree_get_config(void)
+{
+	u32 size, map_len;
+	void *new_dtb;
+
+	if (!initial_dtb)
+		return;
+
+	map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK),
+			(u64)sizeof(struct boot_param_header));
+
+	initial_boot_params = early_memremap(initial_dtb, map_len);
+	size = be32_to_cpu(initial_boot_params->totalsize);
+	if (map_len < size) {
+		early_iounmap(initial_boot_params, map_len);
+		initial_boot_params = early_memremap(initial_dtb, size);
+		map_len = size;
+	}
+
+	new_dtb = alloc_bootmem(size);
+	memcpy(new_dtb, initial_boot_params, size);
+	early_iounmap(initial_boot_params, map_len);
+
+	initial_boot_params = new_dtb;
+
+	/* root level address cells */
+	of_scan_flat_dt(early_init_dt_scan_root, NULL);
+
+	unflatten_device_tree();
+}
+#else
+static inline void x86_flattree_get_config(void) { }
+#endif
+
+void __init x86_dtb_init(void)
+{
+	x86_flattree_get_config();
+
+	if (!of_have_populated_dt())
+		return;
+
+	dtb_setup_hpet();
+	dtb_apic_setup();
+}
+
+#ifdef CONFIG_X86_IO_APIC
+
+struct of_ioapic_type {
+	u32 out_type;
+	u32 trigger;
+	u32 polarity;
+};
+
+static struct of_ioapic_type of_ioapic_type[] =
+{
+	{
+		.out_type	= IRQ_TYPE_EDGE_RISING,
+		.trigger	= IOAPIC_EDGE,
+		.polarity	= 1,
+	},
+	{
+		.out_type	= IRQ_TYPE_LEVEL_LOW,
+		.trigger	= IOAPIC_LEVEL,
+		.polarity	= 0,
+	},
+	{
+		.out_type	= IRQ_TYPE_LEVEL_HIGH,
+		.trigger	= IOAPIC_LEVEL,
+		.polarity	= 1,
+	},
+	{
+		.out_type	= IRQ_TYPE_EDGE_FALLING,
+		.trigger	= IOAPIC_EDGE,
+		.polarity	= 0,
+	},
+};
+
+static int ioapic_xlate(struct irq_domain *id, const u32 *intspec, u32 intsize,
+			u32 *out_hwirq, u32 *out_type)
+{
+	struct io_apic_irq_attr attr;
+	struct of_ioapic_type *it;
+	u32 line, idx, type;
+
+	if (intsize < 2)
+		return -EINVAL;
+
+	line = *intspec;
+	idx = (u32) id->priv;
+	*out_hwirq = line + mp_gsi_routing[idx].gsi_base;
+
+	intspec++;
+	type = *intspec;
+
+	if (type >= ARRAY_SIZE(of_ioapic_type))
+		return -EINVAL;
+
+	it = of_ioapic_type + type;
+	*out_type = it->out_type;
+
+	set_io_apic_irq_attr(&attr, idx, line, it->trigger, it->polarity);
+
+	return io_apic_setup_irq_pin(*out_hwirq, cpu_to_node(0), &attr);
+}
+
+static void __init ioapic_add_ofnode(struct device_node *np)
+{
+	struct resource r;
+	int i, ret;
+
+	ret = of_address_to_resource(np, 0, &r);
+	if (ret) {
+		printk(KERN_ERR "Failed to obtain address for %s\n",
+				np->full_name);
+		return;
+	}
+
+	for (i = 0; i < nr_ioapics; i++) {
+		if (r.start == mp_ioapics[i].apicaddr) {
+			struct irq_domain *id;
+
+			id = kzalloc(sizeof(*id), GFP_KERNEL);
+			BUG_ON(!id);
+			id->controller = np;
+			id->xlate = ioapic_xlate;
+			id->priv = (void *)i;
+			add_interrupt_host(id);
+			return;
+		}
+	}
+	printk(KERN_ERR "IOxAPIC at %s is not registered.\n", np->full_name);
+}
+
+void __init x86_add_irq_domains(void)
+{
+	struct device_node *dp;
+
+	if (!of_have_populated_dt())
+		return;
+
+	for_each_node_with_property(dp, "interrupt-controller") {
+		if (of_device_is_compatible(dp, "intel,ce4100-ioapic"))
+			ioapic_add_ofnode(dp);
+	}
+}
+#else
+void __init x86_add_irq_domains(void) { }
+#endif
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 0b5e2b54656..cdf5bfd9d4d 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -667,21 +667,15 @@ __init void e820_setup_gap(void)
  * boot_params.e820_map, others are passed via SETUP_E820_EXT node of
  * linked list of struct setup_data, which is parsed here.
  */
-void __init parse_e820_ext(struct setup_data *sdata, unsigned long pa_data)
+void __init parse_e820_ext(struct setup_data *sdata)
 {
-	u32 map_len;
 	int entries;
 	struct e820entry *extmap;
 
 	entries = sdata->len / sizeof(struct e820entry);
-	map_len = sdata->len + sizeof(struct setup_data);
-	if (map_len > PAGE_SIZE)
-		sdata = early_ioremap(pa_data, map_len);
 	extmap = (struct e820entry *)(sdata->data);
 	__append_e820_map(extmap, entries);
 	sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
-	if (map_len > PAGE_SIZE)
-		early_iounmap(sdata, map_len);
 	printk(KERN_INFO "extended physical RAM map:\n");
 	e820_print_map("extended");
 }
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index 187aa63b321..ce0be7cd085 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -137,7 +137,7 @@ ENTRY(startup_32)
 	movsl
 1:
 
-#ifdef CONFIG_OLPC_OPENFIRMWARE
+#ifdef CONFIG_OLPC
 	/* save OFW's pgdir table for later use when calling into OFW */
 	movl %cr3, %eax
 	movl %eax, pa(olpc_ofw_pgd)
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 5ee693faa11..948a31eae75 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -223,15 +223,6 @@ void smp_x86_platform_ipi(struct pt_regs *regs)
 
 EXPORT_SYMBOL_GPL(vector_used_by_percpu_irq);
 
-#ifdef CONFIG_OF
-unsigned int irq_create_of_mapping(struct device_node *controller,
-		const u32 *intspec, unsigned int intsize)
-{
-	return intspec[0];
-}
-EXPORT_SYMBOL_GPL(irq_create_of_mapping);
-#endif
-
 #ifdef CONFIG_HOTPLUG_CPU
 /* A cpu has been removed from cpu_online_mask.  Reset irq affinities. */
 void fixup_irqs(void)
diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c
index d30854b18d2..f470e4ef993 100644
--- a/arch/x86/kernel/irqinit.c
+++ b/arch/x86/kernel/irqinit.c
@@ -25,6 +25,7 @@
 #include <asm/setup.h>
 #include <asm/i8259.h>
 #include <asm/traps.h>
+#include <asm/prom.h>
 
 /*
  * ISA PIC or low IO-APIC triggered (INTA-cycle or APIC) interrupts:
@@ -120,6 +121,12 @@ void __init init_IRQ(void)
 	int i;
 
 	/*
+	 * We probably need a better place for this, but it works for
+	 * now ...
+	 */
+	x86_add_irq_domains();
+
+	/*
 	 * On cpu 0, Assign IRQ0_VECTOR..IRQ15_VECTOR's to IRQ 0..15.
 	 * If these IRQ's are handled by legacy interrupt-controllers like PIC,
 	 * then this configuration will likely be static after the boot. If
@@ -308,7 +315,7 @@ void __init native_init_IRQ(void)
 			set_intr_gate(i, interrupt[i-FIRST_EXTERNAL_VECTOR]);
 	}
 
-	if (!acpi_ioapic)
+	if (!acpi_ioapic && !of_ioapic)
 		setup_irq(2, &irq2);
 
 #ifdef CONFIG_X86_32
diff --git a/arch/x86/kernel/rtc.c b/arch/x86/kernel/rtc.c
index 6f39cab052d..3f2ad2640d8 100644
--- a/arch/x86/kernel/rtc.c
+++ b/arch/x86/kernel/rtc.c
@@ -6,6 +6,7 @@
 #include <linux/acpi.h>
 #include <linux/bcd.h>
 #include <linux/pnp.h>
+#include <linux/of.h>
 
 #include <asm/vsyscall.h>
 #include <asm/x86_init.h>
@@ -236,6 +237,8 @@ static __init int add_rtc_cmos(void)
 		}
 	}
 #endif
+	if (of_have_populated_dt())
+		return 0;
 
 	platform_device_register(&rtc_device);
 	dev_info(&rtc_device.dev,
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index c3a606c41ce..b176f2b1f45 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -113,6 +113,7 @@
 #endif
 #include <asm/mce.h>
 #include <asm/alternative.h>
+#include <asm/prom.h>
 
 /*
  * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
@@ -453,16 +454,30 @@ static void __init parse_setup_data(void)
 		return;
 	pa_data = boot_params.hdr.setup_data;
 	while (pa_data) {
-		data = early_memremap(pa_data, PAGE_SIZE);
+		u32 data_len, map_len;
+
+		map_len = max(PAGE_SIZE - (pa_data & ~PAGE_MASK),
+			      (u64)sizeof(struct setup_data));
+		data = early_memremap(pa_data, map_len);
+		data_len = data->len + sizeof(struct setup_data);
+		if (data_len > map_len) {
+			early_iounmap(data, map_len);
+			data = early_memremap(pa_data, data_len);
+			map_len = data_len;
+		}
+
 		switch (data->type) {
 		case SETUP_E820_EXT:
-			parse_e820_ext(data, pa_data);
+			parse_e820_ext(data);
+			break;
+		case SETUP_DTB:
+			add_dtb(pa_data);
 			break;
 		default:
 			break;
 		}
 		pa_data = data->next;
-		early_iounmap(data, PAGE_SIZE);
+		early_iounmap(data, map_len);
 	}
 }
 
@@ -1030,8 +1045,8 @@ void __init setup_arch(char **cmdline_p)
 	 * Read APIC and some other early information from ACPI tables.
 	 */
 	acpi_boot_init();
-
 	sfi_init();
+	x86_dtb_init();
 
 	/*
 	 * get boot-time SMP configuration:
@@ -1065,6 +1080,8 @@ void __init setup_arch(char **cmdline_p)
 #endif
 	x86_init.oem.banner();
 
+	x86_init.timers.wallclock_init();
+
 	mcheck_init();
 
 	local_irq_save(flags);
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index ceb2911aa43..c11514e9128 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -70,6 +70,7 @@ struct x86_init_ops x86_init __initdata = {
 		.setup_percpu_clockev	= setup_boot_APIC_clock,
 		.tsc_pre_init		= x86_init_noop,
 		.timer_init		= hpet_time_init,
+		.wallclock_init		= x86_init_noop,
 	},
 
 	.iommu = {
diff --git a/arch/x86/pci/ce4100.c b/arch/x86/pci/ce4100.c
index 9260b3eb18d..67858be4b52 100644
--- a/arch/x86/pci/ce4100.c
+++ b/arch/x86/pci/ce4100.c
@@ -255,7 +255,7 @@ int bridge_read(unsigned int devfn, int reg, int len, u32 *value)
 static int ce4100_conf_read(unsigned int seg, unsigned int bus,
 			    unsigned int devfn, int reg, int len, u32 *value)
 {
-	int i, retval = 1;
+	int i;
 
 	if (bus == 1) {
 		for (i = 0; i < ARRAY_SIZE(bus1_fixups); i++) {
diff --git a/arch/x86/platform/ce4100/ce4100.c b/arch/x86/platform/ce4100/ce4100.c
index cd6f184c3b3..28071bb31db 100644
--- a/arch/x86/platform/ce4100/ce4100.c
+++ b/arch/x86/platform/ce4100/ce4100.c
@@ -16,21 +16,19 @@
 #include <linux/serial_8250.h>
 
 #include <asm/ce4100.h>
+#include <asm/prom.h>
 #include <asm/setup.h>
+#include <asm/i8259.h>
 #include <asm/io.h>
+#include <asm/io_apic.h>
 
 static int ce4100_i8042_detect(void)
 {
 	return 0;
 }
 
-static void __init sdv_find_smp_config(void)
-{
-}
-
 #ifdef CONFIG_SERIAL_8250
 
-
 static unsigned int mem_serial_in(struct uart_port *p, int offset)
 {
 	offset = offset << p->regshift;
@@ -119,6 +117,15 @@ static void __init sdv_arch_setup(void)
 	sdv_serial_fixup();
 }
 
+#ifdef CONFIG_X86_IO_APIC
+static void __cpuinit sdv_pci_init(void)
+{
+	x86_of_pci_init();
+	/* We can't set this earlier, because we need to calibrate the timer */
+	legacy_pic = &null_legacy_pic;
+}
+#endif
+
 /*
  * CE4100 specific x86_init function overrides and early setup
  * calls.
@@ -129,6 +136,11 @@ void __init x86_ce4100_early_setup(void)
 	x86_platform.i8042_detect = ce4100_i8042_detect;
 	x86_init.resources.probe_roms = x86_init_noop;
 	x86_init.mpparse.get_smp_config = x86_init_uint_noop;
-	x86_init.mpparse.find_smp_config = sdv_find_smp_config;
+	x86_init.mpparse.find_smp_config = x86_init_noop;
 	x86_init.pci.init = ce4100_pci_init;
+
+#ifdef CONFIG_X86_IO_APIC
+	x86_init.pci.init_irq = sdv_pci_init;
+	x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc_nocheck;
+#endif
 }
diff --git a/arch/x86/platform/ce4100/falconfalls.dts b/arch/x86/platform/ce4100/falconfalls.dts
new file mode 100644
index 00000000000..dc701ea5854
--- /dev/null
+++ b/arch/x86/platform/ce4100/falconfalls.dts
@@ -0,0 +1,428 @@
+/*
+ * CE4100 on Falcon Falls
+ *
+ * (c) Copyright 2010 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2 of the License.
+ */
+/dts-v1/;
+/ {
+	model = "intel,falconfalls";
+	compatible = "intel,falconfalls";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "intel,ce4100";
+			reg = <0>;
+			lapic = <&lapic0>;
+		};
+	};
+
+	soc@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "intel,ce4100-cp";
+		ranges;
+
+		ioapic1: interrupt-controller@fec00000 {
+			#interrupt-cells = <2>;
+			compatible = "intel,ce4100-ioapic";
+			interrupt-controller;
+			reg = <0xfec00000 0x1000>;
+		};
+
+		timer@fed00000 {
+			compatible = "intel,ce4100-hpet";
+			reg = <0xfed00000 0x200>;
+		};
+
+		lapic0: interrupt-controller@fee00000 {
+			compatible = "intel,ce4100-lapic";
+			reg = <0xfee00000 0x1000>;
+		};
+
+		pci@3fc {
+			#address-cells = <3>;
+			#size-cells = <2>;
+			compatible = "intel,ce4100-pci", "pci";
+			device_type = "pci";
+			bus-range = <0 0>;
+			ranges = <0x2000000 0 0xbffff000 0xbffff000 0 0x1000
+				  0x2000000 0 0xdffe0000 0xdffe0000 0 0x1000
+				  0x0000000 0 0x0	 0x0	    0 0x100>;
+
+			/* Secondary IO-APIC */
+			ioapic2: interrupt-controller@0,1 {
+				#interrupt-cells = <2>;
+				compatible = "intel,ce4100-ioapic";
+				interrupt-controller;
+				reg = <0x100 0x0 0x0 0x0 0x0>;
+				assigned-addresses = <0x02000000 0x0 0xbffff000 0x0 0x1000>;
+			};
+
+			pci@1,0 {
+				#address-cells = <3>;
+				#size-cells = <2>;
+				compatible = "intel,ce4100-pci", "pci";
+				device_type = "pci";
+				bus-range = <1 1>;
+				ranges = <0x2000000 0 0xdffe0000 0x2000000 0 0xdffe0000 0 0x1000>;
+
+				interrupt-parent = <&ioapic2>;
+
+				display@2,0 {
+					compatible = "pci8086,2e5b.2",
+						   "pci8086,2e5b",
+						   "pciclass038000",
+						   "pciclass0380";
+
+					reg = <0x11000 0x0 0x0 0x0 0x0>;
+					interrupts = <0 1>;
+				};
+
+				multimedia@3,0 {
+					compatible = "pci8086,2e5c.2",
+						   "pci8086,2e5c",
+						   "pciclass048000",
+						   "pciclass0480";
+
+					reg = <0x11800 0x0 0x0 0x0 0x0>;
+					interrupts = <2 1>;
+				};
+
+				multimedia@4,0 {
+					compatible = "pci8086,2e5d.2",
+						   "pci8086,2e5d",
+						   "pciclass048000",
+						   "pciclass0480";
+
+					reg = <0x12000 0x0 0x0 0x0 0x0>;
+					interrupts = <4 1>;
+				};
+
+				multimedia@4,1 {
+					compatible = "pci8086,2e5e.2",
+						   "pci8086,2e5e",
+						   "pciclass048000",
+						   "pciclass0480";
+
+					reg = <0x12100 0x0 0x0 0x0 0x0>;
+					interrupts = <5 1>;
+				};
+
+				sound@6,0 {
+					compatible = "pci8086,2e5f.2",
+						   "pci8086,2e5f",
+						   "pciclass040100",
+						   "pciclass0401";
+
+					reg = <0x13000 0x0 0x0 0x0 0x0>;
+					interrupts = <6 1>;
+				};
+
+				sound@6,1 {
+					compatible = "pci8086,2e5f.2",
+						   "pci8086,2e5f",
+						   "pciclass040100",
+						   "pciclass0401";
+
+					reg = <0x13100 0x0 0x0 0x0 0x0>;
+					interrupts = <7 1>;
+				};
+
+				sound@6,2 {
+					compatible = "pci8086,2e60.2",
+						   "pci8086,2e60",
+						   "pciclass040100",
+						   "pciclass0401";
+
+					reg = <0x13200 0x0 0x0 0x0 0x0>;
+					interrupts = <8 1>;
+				};
+
+				display@8,0 {
+					compatible = "pci8086,2e61.2",
+						   "pci8086,2e61",
+						   "pciclass038000",
+						   "pciclass0380";
+
+					reg = <0x14000 0x0 0x0 0x0 0x0>;
+					interrupts = <9 1>;
+				};
+
+				display@8,1 {
+					compatible = "pci8086,2e62.2",
+						   "pci8086,2e62",
+						   "pciclass038000",
+						   "pciclass0380";
+
+					reg = <0x14100 0x0 0x0 0x0 0x0>;
+					interrupts = <10 1>;
+				};
+
+				multimedia@8,2 {
+					compatible = "pci8086,2e63.2",
+						   "pci8086,2e63",
+						   "pciclass048000",
+						   "pciclass0480";
+
+					reg = <0x14200 0x0 0x0 0x0 0x0>;
+					interrupts = <11 1>;
+				};
+
+				entertainment-encryption@9,0 {
+					compatible = "pci8086,2e64.2",
+						   "pci8086,2e64",
+						   "pciclass101000",
+						   "pciclass1010";
+
+					reg = <0x14800 0x0 0x0 0x0 0x0>;
+					interrupts = <12 1>;
+				};
+
+				localbus@a,0 {
+					compatible = "pci8086,2e65.2",
+						   "pci8086,2e65",
+						   "pciclassff0000",
+						   "pciclassff00";
+
+					reg = <0x15000 0x0 0x0 0x0 0x0>;
+				};
+
+				serial@b,0 {
+					compatible = "pci8086,2e66.2",
+						   "pci8086,2e66",
+						   "pciclass070003",
+						   "pciclass0700";
+
+					reg = <0x15800 0x0 0x0 0x0 0x0>;
+					interrupts = <14 1>;
+				};
+
+				gpio@b,1 {
+					compatible = "pci8086,2e67.2",
+						   "pci8086,2e67",
+						   "pciclassff0000",
+						   "pciclassff00";
+
+					#gpio-cells = <2>;
+					reg = <0x15900 0x0 0x0 0x0 0x0>;
+					interrupts = <15 1>;
+					gpio-controller;
+				};
+
+				i2c-controller@b,2 {
+					#address-cells = <2>;
+					#size-cells = <1>;
+					compatible = "pci8086,2e68.2",
+						   "pci8086,2e68",
+						   "pciclass,ff0000",
+						   "pciclass,ff00";
+
+					reg = <0x15a00 0x0 0x0 0x0 0x0>;
+					interrupts = <16 1>;
+					ranges = <0 0	0x02000000 0 0xdffe0500	0x100
+						  1 0	0x02000000 0 0xdffe0600	0x100
+						  2 0	0x02000000 0 0xdffe0700	0x100>;
+
+					i2c@0 {
+						#address-cells = <1>;
+						#size-cells = <0>;
+						compatible = "intel,ce4100-i2c-controller";
+						reg = <0 0 0x100>;
+					};
+
+					i2c@1 {
+						#address-cells = <1>;
+						#size-cells = <0>;
+						compatible = "intel,ce4100-i2c-controller";
+						reg = <1 0 0x100>;
+
+						gpio@26 {
+							#gpio-cells = <2>;
+							compatible = "ti,pcf8575";
+							reg = <0x26>;
+							gpio-controller;
+						};
+					};
+
+					i2c@2 {
+						#address-cells = <1>;
+						#size-cells = <0>;
+						compatible = "intel,ce4100-i2c-controller";
+						reg = <2 0 0x100>;
+
+						gpio@26 {
+							#gpio-cells = <2>;
+							compatible = "ti,pcf8575";
+							reg = <0x26>;
+							gpio-controller;
+						};
+					};
+				};
+
+				smard-card@b,3 {
+					compatible = "pci8086,2e69.2",
+						   "pci8086,2e69",
+						   "pciclass070500",
+						   "pciclass0705";
+
+					reg = <0x15b00 0x0 0x0 0x0 0x0>;
+					interrupts = <15 1>;
+				};
+
+				spi-controller@b,4 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					compatible =
+						"pci8086,2e6a.2",
+						"pci8086,2e6a",
+						"pciclass,ff0000",
+						"pciclass,ff00";
+
+					reg = <0x15c00 0x0 0x0 0x0 0x0>;
+					interrupts = <15 1>;
+
+					dac@0 {
+						compatible = "ti,pcm1755";
+						reg = <0>;
+						spi-max-frequency = <115200>;
+					};
+
+					dac@1 {
+						compatible = "ti,pcm1609a";
+						reg = <1>;
+						spi-max-frequency = <115200>;
+					};
+
+					eeprom@2 {
+						compatible = "atmel,at93c46";
+						reg = <2>;
+						spi-max-frequency = <115200>;
+					};
+				};
+
+				multimedia@b,7 {
+					compatible = "pci8086,2e6d.2",
+						   "pci8086,2e6d",
+						   "pciclassff0000",
+						   "pciclassff00";
+
+					reg = <0x15f00 0x0 0x0 0x0 0x0>;
+				};
+
+				ethernet@c,0 {
+					compatible = "pci8086,2e6e.2",
+						   "pci8086,2e6e",
+						   "pciclass020000",
+						   "pciclass0200";
+
+					reg = <0x16000 0x0 0x0 0x0 0x0>;
+					interrupts = <21 1>;
+				};
+
+				clock@c,1 {
+					compatible = "pci8086,2e6f.2",
+						   "pci8086,2e6f",
+						   "pciclassff0000",
+						   "pciclassff00";
+
+					reg = <0x16100 0x0 0x0 0x0 0x0>;
+					interrupts = <3 1>;
+				};
+
+				usb@d,0 {
+					compatible = "pci8086,2e70.2",
+						   "pci8086,2e70",
+						   "pciclass0c0320",
+						   "pciclass0c03";
+
+					reg = <0x16800 0x0 0x0 0x0 0x0>;
+					interrupts = <22 3>;
+				};
+
+				usb@d,1 {
+					compatible = "pci8086,2e70.2",
+						   "pci8086,2e70",
+						   "pciclass0c0320",
+						   "pciclass0c03";
+
+					reg = <0x16900 0x0 0x0 0x0 0x0>;
+					interrupts = <22 3>;
+				};
+
+				sata@e,0 {
+					compatible = "pci8086,2e71.0",
+						   "pci8086,2e71",
+						   "pciclass010601",
+						   "pciclass0106";
+
+					reg = <0x17000 0x0 0x0 0x0 0x0>;
+					interrupts = <23 3>;
+				};
+
+				flash@f,0 {
+					compatible = "pci8086,701.1",
+						   "pci8086,701",
+						   "pciclass050100",
+						   "pciclass0501";
+
+					reg = <0x17800 0x0 0x0 0x0 0x0>;
+					interrupts = <13 1>;
+				};
+
+				entertainment-encryption@10,0 {
+					compatible = "pci8086,702.1",
+						   "pci8086,702",
+						   "pciclass101000",
+						   "pciclass1010";
+
+					reg = <0x18000 0x0 0x0 0x0 0x0>;
+				};
+
+				co-processor@11,0 {
+					compatible = "pci8086,703.1",
+						   "pci8086,703",
+						   "pciclass0b4000",
+						   "pciclass0b40";
+
+					reg = <0x18800 0x0 0x0 0x0 0x0>;
+					interrupts = <1 1>;
+				};
+
+				multimedia@12,0 {
+					compatible = "pci8086,704.0",
+						   "pci8086,704",
+						   "pciclass048000",
+						   "pciclass0480";
+
+					reg = <0x19000 0x0 0x0 0x0 0x0>;
+				};
+			};
+
+			isa@1f,0 {
+				#address-cells = <2>;
+				#size-cells = <1>;
+				compatible = "isa";
+				ranges = <1 0 0 0 0 0x100>;
+
+				rtc@70 {
+					compatible = "intel,ce4100-rtc", "motorola,mc146818";
+					interrupts = <8 3>;
+					interrupt-parent = <&ioapic1>;
+					ctrl-reg = <2>;
+					freq-reg = <0x26>;
+					reg = <1 0x70 2>;
+				};
+			};
+		};
+	};
+};
diff --git a/arch/x86/platform/mrst/mrst.c b/arch/x86/platform/mrst/mrst.c
index ea6529e93c6..5c0207bf959 100644
--- a/arch/x86/platform/mrst/mrst.c
+++ b/arch/x86/platform/mrst/mrst.c
@@ -31,6 +31,7 @@
 #include <asm/apic.h>
 #include <asm/io_apic.h>
 #include <asm/mrst.h>
+#include <asm/mrst-vrtc.h>
 #include <asm/io.h>
 #include <asm/i8259.h>
 #include <asm/intel_scu_ipc.h>
@@ -268,6 +269,7 @@ void __init x86_mrst_early_setup(void)
 
 	x86_platform.calibrate_tsc = mrst_calibrate_tsc;
 	x86_platform.i8042_detect = mrst_i8042_detect;
+	x86_init.timers.wallclock_init = mrst_rtc_init;
 	x86_init.pci.init = pci_mrst_init;
 	x86_init.pci.fixup_irqs = x86_init_noop;
 
diff --git a/arch/x86/platform/mrst/vrtc.c b/arch/x86/platform/mrst/vrtc.c
index 32cd7edd71a..04cf645feb9 100644
--- a/arch/x86/platform/mrst/vrtc.c
+++ b/arch/x86/platform/mrst/vrtc.c
@@ -100,22 +100,14 @@ int vrtc_set_mmss(unsigned long nowtime)
 
 void __init mrst_rtc_init(void)
 {
-	unsigned long rtc_paddr;
-	void __iomem *virt_base;
+	unsigned long vrtc_paddr = sfi_mrtc_array[0].phys_addr;
 
 	sfi_table_parse(SFI_SIG_MRTC, NULL, NULL, sfi_parse_mrtc);
-	if (!sfi_mrtc_num)
+	if (!sfi_mrtc_num || !vrtc_paddr)
 		return;
 
-	rtc_paddr = sfi_mrtc_array[0].phys_addr;
-
-	/* vRTC's register address may not be page aligned */
-	set_fixmap_nocache(FIX_LNW_VRTC, rtc_paddr);
-
-	virt_base = (void __iomem *)__fix_to_virt(FIX_LNW_VRTC);
-	virt_base += rtc_paddr & ~PAGE_MASK;
-	vrtc_virt_base = virt_base;
-
+	vrtc_virt_base = (void __iomem *)set_fixmap_offset_nocache(FIX_LNW_VRTC,
+								vrtc_paddr);
 	x86_platform.get_wallclock = vrtc_get_time;
 	x86_platform.set_wallclock = vrtc_set_mmss;
 }
diff --git a/arch/x86/platform/olpc/Makefile b/arch/x86/platform/olpc/Makefile
index e797428b163..c2a8cab65e5 100644
--- a/arch/x86/platform/olpc/Makefile
+++ b/arch/x86/platform/olpc/Makefile
@@ -1,4 +1,4 @@
 obj-$(CONFIG_OLPC)		+= olpc.o
 obj-$(CONFIG_OLPC_XO1)		+= olpc-xo1.o
-obj-$(CONFIG_OLPC_OPENFIRMWARE)	+= olpc_ofw.o
-obj-$(CONFIG_OLPC_OPENFIRMWARE_DT)	+= olpc_dt.o
+obj-$(CONFIG_OLPC)		+= olpc_ofw.o
+obj-$(CONFIG_OF_PROMTREE)	+= olpc_dt.o
diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c
index 61653f07967..1b46a9d9f90 100644
--- a/drivers/i2c/busses/i2c-ocores.c
+++ b/drivers/i2c/busses/i2c-ocores.c
@@ -330,9 +330,7 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
 	i2c->adap = ocores_adapter;
 	i2c_set_adapdata(&i2c->adap, i2c);
 	i2c->adap.dev.parent = &pdev->dev;
-#ifdef CONFIG_OF
 	i2c->adap.dev.of_node = pdev->dev.of_node;
-#endif
 
 	/* add i2c adapter to i2c tree */
 	ret = i2c_add_adapter(&i2c->adap);
@@ -390,15 +388,11 @@ static int ocores_i2c_resume(struct platform_device *pdev)
 #define ocores_i2c_resume	NULL
 #endif
 
-#ifdef CONFIG_OF
 static struct of_device_id ocores_i2c_match[] = {
-        {
-                .compatible = "opencores,i2c-ocores",
-        },
-        {},
+	{ .compatible = "opencores,i2c-ocores", },
+	{},
 };
 MODULE_DEVICE_TABLE(of, ocores_i2c_match);
-#endif
 
 /* work with hotplug and coldplug */
 MODULE_ALIAS("platform:ocores-i2c");
@@ -411,9 +405,7 @@ static struct platform_driver ocores_i2c_driver = {
 	.driver  = {
 		.owner = THIS_MODULE,
 		.name = "ocores-i2c",
-#ifdef CONFIG_OF
-                .of_match_table = ocores_i2c_match,
-#endif
+		.of_match_table = ocores_i2c_match,
 	},
 };
 
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index f0bd5bcdf56..045ba6efea4 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -537,9 +537,7 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
 	client->dev.parent = &client->adapter->dev;
 	client->dev.bus = &i2c_bus_type;
 	client->dev.type = &i2c_client_type;
-#ifdef CONFIG_OF
 	client->dev.of_node = info->of_node;
-#endif
 
 	dev_set_name(&client->dev, "%d-%04x", i2c_adapter_id(adap),
 		     client->addr);
diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c
index fd877f633dd..2f7fc0c5146 100644
--- a/drivers/mmc/host/mmc_spi.c
+++ b/drivers/mmc/host/mmc_spi.c
@@ -1516,21 +1516,17 @@ static int __devexit mmc_spi_remove(struct spi_device *spi)
 	return 0;
 }
 
-#if defined(CONFIG_OF)
 static struct of_device_id mmc_spi_of_match_table[] __devinitdata = {
 	{ .compatible = "mmc-spi-slot", },
 	{},
 };
-#endif
 
 static struct spi_driver mmc_spi_driver = {
 	.driver = {
 		.name =		"mmc_spi",
 		.bus =		&spi_bus_type,
 		.owner =	THIS_MODULE,
-#if defined(CONFIG_OF)
 		.of_match_table = mmc_spi_of_match_table,
-#endif
 	},
 	.probe =	mmc_spi_probe,
 	.remove =	__devexit_p(mmc_spi_remove),
diff --git a/drivers/net/ethoc.c b/drivers/net/ethoc.c
index b79d7e1555d..db0290f05bd 100644
--- a/drivers/net/ethoc.c
+++ b/drivers/net/ethoc.c
@@ -1163,15 +1163,11 @@ static int ethoc_resume(struct platform_device *pdev)
 # define ethoc_resume  NULL
 #endif
 
-#ifdef CONFIG_OF
 static struct of_device_id ethoc_match[] = {
-	{
-		.compatible = "opencores,ethoc",
-	},
+	{ .compatible = "opencores,ethoc", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, ethoc_match);
-#endif
 
 static struct platform_driver ethoc_driver = {
 	.probe   = ethoc_probe,
@@ -1181,9 +1177,7 @@ static struct platform_driver ethoc_driver = {
 	.driver  = {
 		.name = "ethoc",
 		.owner = THIS_MODULE,
-#ifdef CONFIG_OF
 		.of_match_table = ethoc_match,
-#endif
 	},
 };
 
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index 3c6e100a3ad..d06a6374ed6 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -69,4 +69,10 @@ config OF_MDIO
 	help
 	  OpenFirmware MDIO bus (Ethernet PHY) accessors
 
+config OF_PCI
+	def_tristate PCI
+	depends on PCI && (PPC || MICROBLAZE || X86)
+	help
+	  OpenFirmware PCI bus accessors
+
 endmenu # OF
diff --git a/drivers/of/Makefile b/drivers/of/Makefile
index 3ab21a0a490..f7861ed2f28 100644
--- a/drivers/of/Makefile
+++ b/drivers/of/Makefile
@@ -9,3 +9,4 @@ obj-$(CONFIG_OF_I2C)	+= of_i2c.o
 obj-$(CONFIG_OF_NET)	+= of_net.o
 obj-$(CONFIG_OF_SPI)	+= of_spi.o
 obj-$(CONFIG_OF_MDIO)	+= of_mdio.o
+obj-$(CONFIG_OF_PCI)	+= of_pci.o
diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
new file mode 100644
index 00000000000..ac1ec54e4fd
--- /dev/null
+++ b/drivers/of/of_pci.c
@@ -0,0 +1,92 @@
+#include <linux/kernel.h>
+#include <linux/of_pci.h>
+#include <linux/of_irq.h>
+#include <asm/prom.h>
+
+/**
+ * of_irq_map_pci - Resolve the interrupt for a PCI device
+ * @pdev:       the device whose interrupt is to be resolved
+ * @out_irq:    structure of_irq filled by this function
+ *
+ * This function resolves the PCI interrupt for a given PCI device. If a
+ * device-node exists for a given pci_dev, it will use normal OF tree
+ * walking. If not, it will implement standard swizzling and walk up the
+ * PCI tree until an device-node is found, at which point it will finish
+ * resolving using the OF tree walking.
+ */
+int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
+{
+	struct device_node *dn, *ppnode;
+	struct pci_dev *ppdev;
+	u32 lspec;
+	__be32 lspec_be;
+	__be32 laddr[3];
+	u8 pin;
+	int rc;
+
+	/* Check if we have a device node, if yes, fallback to standard
+	 * device tree parsing
+	 */
+	dn = pci_device_to_OF_node(pdev);
+	if (dn) {
+		rc = of_irq_map_one(dn, 0, out_irq);
+		if (!rc)
+			return rc;
+	}
+
+	/* Ok, we don't, time to have fun. Let's start by building up an
+	 * interrupt spec.  we assume #interrupt-cells is 1, which is standard
+	 * for PCI. If you do different, then don't use that routine.
+	 */
+	rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
+	if (rc != 0)
+		return rc;
+	/* No pin, exit */
+	if (pin == 0)
+		return -ENODEV;
+
+	/* Now we walk up the PCI tree */
+	lspec = pin;
+	for (;;) {
+		/* Get the pci_dev of our parent */
+		ppdev = pdev->bus->self;
+
+		/* Ouch, it's a host bridge... */
+		if (ppdev == NULL) {
+			ppnode = pci_bus_to_OF_node(pdev->bus);
+
+			/* No node for host bridge ? give up */
+			if (ppnode == NULL)
+				return -EINVAL;
+		} else {
+			/* We found a P2P bridge, check if it has a node */
+			ppnode = pci_device_to_OF_node(ppdev);
+		}
+
+		/* Ok, we have found a parent with a device-node, hand over to
+		 * the OF parsing code.
+		 * We build a unit address from the linux device to be used for
+		 * resolution. Note that we use the linux bus number which may
+		 * not match your firmware bus numbering.
+		 * Fortunately, in most cases, interrupt-map-mask doesn't
+		 * include the bus number as part of the matching.
+		 * You should still be careful about that though if you intend
+		 * to rely on this function (you ship  a firmware that doesn't
+		 * create device nodes for all PCI devices).
+		 */
+		if (ppnode)
+			break;
+
+		/* We can only get here if we hit a P2P bridge with no node,
+		 * let's do standard swizzling and try again
+		 */
+		lspec = pci_swizzle_interrupt_pin(pdev, lspec);
+		pdev = ppdev;
+	}
+
+	lspec_be = cpu_to_be32(lspec);
+	laddr[0] = cpu_to_be32((pdev->bus->number << 16) | (pdev->devfn << 8));
+	laddr[1]  = laddr[2] = cpu_to_be32(0);
+	return of_irq_map_raw(ppnode, &lspec_be, 1, laddr, out_irq);
+}
+EXPORT_SYMBOL_GPL(of_irq_map_pci);
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index dc2a0ba969c..911e75cdc12 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -37,6 +37,8 @@
 #include <linux/mod_devicetable.h>
 #include <linux/log2.h>
 #include <linux/pm.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
 
 /* this is for "generic access to PC-style RTC" using CMOS_READ/CMOS_WRITE */
 #include <asm-generic/rtc.h>
@@ -1057,6 +1059,47 @@ static struct pnp_driver cmos_pnp_driver = {
 
 #endif	/* CONFIG_PNP */
 
+#ifdef CONFIG_OF
+static const struct of_device_id of_cmos_match[] = {
+	{
+		.compatible = "motorola,mc146818",
+	},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, of_cmos_match);
+
+static __init void cmos_of_init(struct platform_device *pdev)
+{
+	struct device_node *node = pdev->dev.of_node;
+	struct rtc_time time;
+	int ret;
+	const __be32 *val;
+
+	if (!node)
+		return;
+
+	val = of_get_property(node, "ctrl-reg", NULL);
+	if (val)
+		CMOS_WRITE(be32_to_cpup(val), RTC_CONTROL);
+
+	val = of_get_property(node, "freq-reg", NULL);
+	if (val)
+		CMOS_WRITE(be32_to_cpup(val), RTC_FREQ_SELECT);
+
+	get_rtc_time(&time);
+	ret = rtc_valid_tm(&time);
+	if (ret) {
+		struct rtc_time def_time = {
+			.tm_year = 1,
+			.tm_mday = 1,
+		};
+		set_rtc_time(&def_time);
+	}
+}
+#else
+static inline void cmos_of_init(struct platform_device *pdev) {}
+#define of_cmos_match NULL
+#endif
 /*----------------------------------------------------------------*/
 
 /* Platform setup should have set up an RTC device, when PNP is
@@ -1065,6 +1108,7 @@ static struct pnp_driver cmos_pnp_driver = {
 
 static int __init cmos_platform_probe(struct platform_device *pdev)
 {
+	cmos_of_init(pdev);
 	cmos_wake_setup(&pdev->dev);
 	return cmos_do_probe(&pdev->dev,
 			platform_get_resource(pdev, IORESOURCE_IO, 0),
@@ -1096,6 +1140,7 @@ static struct platform_driver cmos_platform_driver = {
 #ifdef CONFIG_PM
 		.pm		= &cmos_pm_ops,
 #endif
+		.of_match_table = of_cmos_match,
 	}
 };
 
diff --git a/drivers/rtc/rtc-mrst.c b/drivers/rtc/rtc-mrst.c
index 4db96fa306f..b86bc328463 100644
--- a/drivers/rtc/rtc-mrst.c
+++ b/drivers/rtc/rtc-mrst.c
@@ -62,6 +62,17 @@ static inline int is_intr(u8 rtc_intr)
 	return rtc_intr & RTC_IRQMASK;
 }
 
+static inline unsigned char vrtc_is_updating(void)
+{
+	unsigned char uip;
+	unsigned long flags;
+
+	spin_lock_irqsave(&rtc_lock, flags);
+	uip = (vrtc_cmos_read(RTC_FREQ_SELECT) & RTC_UIP);
+	spin_unlock_irqrestore(&rtc_lock, flags);
+	return uip;
+}
+
 /*
  * rtc_time's year contains the increment over 1900, but vRTC's YEAR
  * register can't be programmed to value larger than 0x64, so vRTC
@@ -76,7 +87,7 @@ static int mrst_read_time(struct device *dev, struct rtc_time *time)
 {
 	unsigned long flags;
 
-	if (rtc_is_updating())
+	if (vrtc_is_updating())
 		mdelay(20);
 
 	spin_lock_irqsave(&rtc_lock, flags);
diff --git a/drivers/spi/pxa2xx_spi.c b/drivers/spi/pxa2xx_spi.c
index 95928833855..a429b01d028 100644
--- a/drivers/spi/pxa2xx_spi.c
+++ b/drivers/spi/pxa2xx_spi.c
@@ -1557,9 +1557,7 @@ static int __devinit pxa2xx_spi_probe(struct platform_device *pdev)
 	drv_data->ssp = ssp;
 
 	master->dev.parent = &pdev->dev;
-#ifdef CONFIG_OF
 	master->dev.of_node = pdev->dev.of_node;
-#endif
 	/* the spi->mode bits understood by this driver: */
 	master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
 
diff --git a/drivers/spi/pxa2xx_spi_pci.c b/drivers/spi/pxa2xx_spi_pci.c
index 19752b09e15..378e504f89e 100644
--- a/drivers/spi/pxa2xx_spi_pci.c
+++ b/drivers/spi/pxa2xx_spi_pci.c
@@ -89,9 +89,7 @@ static int __devinit ce4100_spi_probe(struct pci_dev *dev,
 		goto err_nomem;
 
 	pdev->dev.parent = &dev->dev;
-#ifdef CONFIG_OF
 	pdev->dev.of_node = dev->dev.of_node;
-#endif
 	ssp = &spi_info->ssp;
 	ssp->phys_base = pci_resource_start(dev, 0);
 	ssp->mmio_base = ioremap(phys_beg, phys_len);
diff --git a/drivers/spi/xilinx_spi.c b/drivers/spi/xilinx_spi.c
index 7adaef62a99..4d2c75df886 100644
--- a/drivers/spi/xilinx_spi.c
+++ b/drivers/spi/xilinx_spi.c
@@ -351,14 +351,12 @@ static irqreturn_t xilinx_spi_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-#ifdef CONFIG_OF
 static const struct of_device_id xilinx_spi_of_match[] = {
 	{ .compatible = "xlnx,xps-spi-2.00.a", },
 	{ .compatible = "xlnx,xps-spi-2.00.b", },
 	{}
 };
 MODULE_DEVICE_TABLE(of, xilinx_spi_of_match);
-#endif
 
 struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
 	u32 irq, s16 bus_num, int num_cs, int little_endian, int bits_per_word)
@@ -394,9 +392,7 @@ struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
 
 	master->bus_num = bus_num;
 	master->num_chipselect = num_cs;
-#ifdef CONFIG_OF
 	master->dev.of_node = dev->of_node;
-#endif
 
 	xspi->mem = *mem;
 	xspi->irq = irq;
@@ -539,9 +535,7 @@ static struct platform_driver xilinx_spi_driver = {
 	.driver = {
 		.name = XILINX_SPI_NAME,
 		.owner = THIS_MODULE,
-#ifdef CONFIG_OF
 		.of_match_table = xilinx_spi_of_match,
-#endif
 	},
 };
 
diff --git a/include/linux/device.h b/include/linux/device.h
index 1bf5cf0b451..ca5d25225aa 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -128,9 +128,7 @@ struct device_driver {
 
 	bool suppress_bind_attrs;	/* disables bind/unbind via sysfs */
 
-#if defined(CONFIG_OF)
 	const struct of_device_id	*of_match_table;
-#endif
 
 	int (*probe) (struct device *dev);
 	int (*remove) (struct device *dev);
@@ -441,9 +439,8 @@ struct device {
 					     override */
 	/* arch specific additions */
 	struct dev_archdata	archdata;
-#ifdef CONFIG_OF
-	struct device_node	*of_node;
-#endif
+
+	struct device_node	*of_node; /* associated device tree node */
 
 	dev_t			devt;	/* dev_t, creates the sysfs "dev" */
 
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 903576df88d..06a8d9c7de9 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -258,9 +258,7 @@ struct i2c_board_info {
 	unsigned short	addr;
 	void		*platform_data;
 	struct dev_archdata	*archdata;
-#ifdef CONFIG_OF
 	struct device_node *of_node;
-#endif
 	int		irq;
 };
 
diff --git a/include/linux/of.h b/include/linux/of.h
index cad7cf0ab27..266db1d0baa 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -23,8 +23,6 @@
 
 #include <asm/byteorder.h>
 
-#ifdef CONFIG_OF
-
 typedef u32 phandle;
 typedef u32 ihandle;
 
@@ -65,11 +63,18 @@ struct device_node {
 #endif
 };
 
+#ifdef CONFIG_OF
+
 /* Pointer for first entry in chain of all nodes. */
 extern struct device_node *allnodes;
 extern struct device_node *of_chosen;
 extern rwlock_t devtree_lock;
 
+static inline bool of_have_populated_dt(void)
+{
+	return allnodes != NULL;
+}
+
 static inline bool of_node_is_root(const struct device_node *node)
 {
 	return node && (node->parent == NULL);
@@ -222,5 +227,12 @@ extern void of_attach_node(struct device_node *);
 extern void of_detach_node(struct device_node *);
 #endif
 
+#else
+
+static inline bool of_have_populated_dt(void)
+{
+	return false;
+}
+
 #endif /* CONFIG_OF */
 #endif /* _LINUX_OF_H */
diff --git a/include/linux/of_pci.h b/include/linux/of_pci.h
new file mode 100644
index 00000000000..85a27b650d7
--- /dev/null
+++ b/include/linux/of_pci.h
@@ -0,0 +1,9 @@
+#ifndef __OF_PCI_H
+#define __OF_PCI_H
+
+#include <linux/pci.h>
+
+struct pci_dev;
+struct of_irq;
+int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
+#endif