Merge tag 'devicetree-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull DeviceTree updates from Rob Herring:

 - fix sparse warnings in drivers/of/

 - add more overlay unittests

 - update dtc to v1.4.4-8-g756ffc4f52f6. This adds more checks on dts
   files such as unit-address formatting and stricter character sets for
   node and property names

 - add a common DT modalias function

 - move trivial-devices.txt up and out of i2c dir

 - ARM NVIC interrupt controller binding

 - vendor prefixes for Sensirion, Dioo, Nordic, ROHM

 - correct some binding file locations

* tag 'devicetree-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (24 commits)
  of: fix sparse warnings in fdt, irq, reserved mem, and resolver code
  of: fix sparse warning in of_pci_range_parser_one
  of: fix sparse warnings in of_find_next_cache_node
  of/unittest: Missing unlocks on error
  of: fix uninitialized variable warning for overlay test
  of: fix unittest build without CONFIG_OF_OVERLAY
  of: Add unit tests for applying overlays
  of: per-file dtc compiler flags
  fpga: region: add missing DT documentation for config complete timeout
  of: Add vendor prefix for ROHM Semiconductor
  of: fix "/cpus" reference leak in of_numa_parse_cpu_nodes()
  of: Add vendor prefix for Nordic Semiconductor
  dt-bindings: arm,nvic: Binding for ARM NVIC interrupt controller on Cortex-M
  dtc: update warning settings for new bus and node/property name checks
  scripts/dtc: Update to upstream version v1.4.4-8-g756ffc4f52f6
  scripts/dtc: automate getting dtc version and log in update script
  of: Add function for generating a DT modalias with a newline
  of: fix of_device_get_modalias returned length when truncating buffers
  Documentation: devicetree: move trivial-devices out of I2C realm
  dt-bindings: add vendor prefix for Dioo
  ..

Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt

 Device-Tree bindings for Atmel's HLCDC (High LCD Controller) DRM driver
 
 The Atmel HLCDC Display Controller is subdevice of the HLCDC MFD device.
-See ../mfd/atmel-hlcdc.txt for more details.
+See ../../mfd/atmel-hlcdc.txt for more details.
 
 Required properties:
  - compatible: value should be "atmel,hlcdc-display-controller"

Documentation/devicetree/bindings/fpga/fpga-region.txt

@@ -193,6 +193,8 @@ Optional properties:
 - region-freeze-timeout-us : The maximum time in microseconds to wait for
 	bridges to successfully become disabled before the region has been
 	programmed.
+- config-complete-timeout-us : The maximum time in microseconds time for the
+	FPGA to go to operating mode after the region has been programmed.
 - child nodes : devices in the FPGA after programming.
 
 In the example below, when an overlay is applied targeting fpga-region0,

Documentation/devicetree/bindings/interrupt-controller/arm,nvic.txt

+* ARM Nested Vector Interrupt Controller (NVIC)
+
+The NVIC provides an interrupt controller that is tightly coupled to
+Cortex-M based processor cores.  The NVIC implemented on different SoCs
+vary in the number of interrupts and priority bits per interrupt.
+
+Main node required properties:
+
+- compatible : should be one of:
+	"arm,v6m-nvic"
+	"arm,v7m-nvic"
+	"arm,v8m-nvic"
+- interrupt-controller : Identifies the node as an interrupt controller
+- #interrupt-cells : Specifies the number of cells needed to encode an
+  interrupt source.  The type shall be a <u32> and the value shall be 2.
+
+  The 1st cell contains the interrupt number for the interrupt type.
+
+  The 2nd cell is the priority of the interrupt.
+
+- reg : Specifies base physical address(s) and size of the NVIC registers.
+  This is at a fixed address (0xe000e100) and size (0xc00).
+
+- arm,num-irq-priority-bits: The number of priority bits implemented by the
+  given SoC
+
+Example:
+
+	intc: interrupt-controller@e000e100 {
+		compatible = "arm,v7m-nvic";
+		#interrupt-cells = <2>;
+		#address-cells = <1>;
+		interrupt-controller;
+		reg = <0xe000e100 0xc00>;
+		arm,num-irq-priority-bits = <4>;
+	};

Documentation/devicetree/bindings/mfd/atmel-hlcdc.txt

@@ -15,7 +15,7 @@ Required properties:
 
 The HLCDC IP exposes two subdevices:
  - a PWM chip: see ../pwm/atmel-hlcdc-pwm.txt
- - a Display Controller: see ../display/atmel-hlcdc-dc.txt
+ - a Display Controller: see ../display/atmel/hlcdc-dc.txt
 
 Example:
 

Documentation/devicetree/bindings/net/moxa,moxart-mac.txt → Documentation/devicetree/bindings/net/faraday,ftmac.txt

-MOXA ART Ethernet Controller
+Faraday Ethernet Controller
 
 Required properties:
 
-- compatible : Must be "moxa,moxart-mac"
+- compatible : Must contain "faraday,ftmac", as well as one of
+		the SoC specific identifiers:
+		"andestech,atmac100"
+		"moxa,moxart-mac"
 - reg : Should contain register location and length
 - interrupts : Should contain the mac interrupt number
 

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -80,6 +80,7 @@ denx	Denx Software Engineering
 devantech	Devantech, Ltd.
 digi	Digi International Inc.
 digilent	Diglent, Inc.
+dioo	Dioo Microcircuit Co., Ltd
 dlg	Dialog Semiconductor
 dlink	D-Link Corporation
 dmo	Data Modul AG
@@ -215,6 +216,7 @@ newhaven	Newhaven Display International
 ni	National Instruments
 nintendo	Nintendo
 nokia	Nokia
+nordic	Nordic Semiconductor
 nuvoton	Nuvoton Technology Corporation
 nvd	New Vision Display
 nvidia	NVIDIA
@@ -261,6 +263,7 @@ richtek	Richtek Technology Corporation
 ricoh	Ricoh Co. Ltd.
 rikomagic	Rikomagic Tech Corp. Ltd
 rockchip	Fuzhou Rockchip Electronics Co., Ltd
+rohm	ROHM Semiconductor Co., Ltd
 samsung	Samsung Semiconductor
 samtec	Samtec/Softing company
 sandisk	Sandisk Corporation

arch/powerpc/platforms/pseries/ibmebus.c

@@ -410,10 +410,7 @@ static ssize_t name_show(struct device *dev,
 static ssize_t modalias_show(struct device *dev,
 				struct device_attribute *attr, char *buf)
 {
-	ssize_t len = of_device_get_modalias(dev, buf, PAGE_SIZE - 2);
-	buf[len] = '\n';
-	buf[len+1] = 0;
-	return len+1;
+	return of_device_modalias(dev, buf, PAGE_SIZE);
 }
 
 static struct device_attribute ibmebus_bus_device_attrs[] = {

drivers/base/platform.c

@@ -847,7 +847,7 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
 	struct platform_device	*pdev = to_platform_device(dev);
 	int len;
 
-	len = of_device_get_modalias(dev, buf, PAGE_SIZE -1);
+	len = of_device_modalias(dev, buf, PAGE_SIZE);
 	if (len != -ENODEV)
 		return len;
 

drivers/macintosh/macio_sysfs.c

@@ -41,12 +41,7 @@ compatible_show (struct device *dev, struct device_attribute *attr, char *buf)
 static ssize_t modalias_show (struct device *dev, struct device_attribute *attr,
 			      char *buf)
 {
-	int len = of_device_get_modalias(dev, buf, PAGE_SIZE - 2);
-
-	buf[len] = '\n';
-	buf[len+1] = 0;
-
-	return len+1;
+	return of_device_modalias(dev, buf, PAGE_SIZE);
 }
 
 static ssize_t devspec_show(struct device *dev,

drivers/of/address.c

@@ -263,7 +263,7 @@ struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,
 	if (!parser->range || parser->range + parser->np > parser->end)
 		return NULL;
 
-	range->pci_space = parser->range[0];
+	range->pci_space = be32_to_cpup(parser->range);
 	range->flags = of_bus_pci_get_flags(parser->range);
 	range->pci_addr = of_read_number(parser->range + 1, ns);
 	range->cpu_addr = of_translate_address(parser->node,

drivers/of/base.c

@@ -2281,15 +2281,14 @@ EXPORT_SYMBOL_GPL(of_console_check);
  */
 struct device_node *of_find_next_cache_node(const struct device_node *np)
 {
-	struct device_node *child;
-	const phandle *handle;
+	struct device_node *child, *cache_node;
 
-	handle = of_get_property(np, "l2-cache", NULL);
-	if (!handle)
-		handle = of_get_property(np, "next-level-cache", NULL);
+	cache_node = of_parse_phandle(np, "l2-cache", 0);
+	if (!cache_node)
+		cache_node = of_parse_phandle(np, "next-level-cache", 0);
 
-	if (handle)
-		return of_find_node_by_phandle(be32_to_cpup(handle));
+	if (cache_node)
+		return cache_node;
 
 	/* OF on pmac has nodes instead of properties named "l2-cache"
 	 * beneath CPU nodes.

drivers/of/device.c

@@ -176,7 +176,7 @@ const void *of_device_get_match_data(const struct device *dev)
 }
 EXPORT_SYMBOL(of_device_get_match_data);
 
-ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
+static ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
 {
 	const char *compat;
 	int cplen, i;
@@ -223,9 +223,8 @@ ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
 			str[i] = '_';
 	}
 
-	return tsize;
+	return repend;
 }
-EXPORT_SYMBOL_GPL(of_device_get_modalias);
 
 int of_device_request_module(struct device *dev)
 {
@@ -250,6 +249,21 @@ int of_device_request_module(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(of_device_request_module);
 
+/**
+ * of_device_modalias - Fill buffer with newline terminated modalias string
+ */
+ssize_t of_device_modalias(struct device *dev, char *str, ssize_t len)
+{
+	ssize_t sl = of_device_get_modalias(dev, str, len - 2);
+	if (sl < 0)
+		return sl;
+
+	str[sl++] = '\n';
+	str[sl] = 0;
+	return sl;
+}
+EXPORT_SYMBOL_GPL(of_device_modalias);
+
 /**
  * of_device_uevent - Display OF related uevent information
  */

drivers/of/fdt.c

@@ -31,6 +31,8 @@
 #include <asm/setup.h>  /* for COMMAND_LINE_SIZE */
 #include <asm/page.h>
 
+#include "of_private.h"
+
 /*
  * of_fdt_limit_memory - limit the number of regions in the /memory node
  * @limit: maximum entries
@@ -46,8 +48,8 @@ void of_fdt_limit_memory(int limit)
 	const void *val;
 	int nr_address_cells = OF_ROOT_NODE_ADDR_CELLS_DEFAULT;
 	int nr_size_cells = OF_ROOT_NODE_SIZE_CELLS_DEFAULT;
-	const uint32_t *addr_prop;
-	const uint32_t *size_prop;
+	const __be32 *addr_prop;
+	const __be32 *size_prop;
 	int root_offset;
 	int cell_size;
 
@@ -469,7 +471,7 @@ static int unflatten_dt_nodes(const void *blob,
  * Returns NULL on failure or the memory chunk containing the unflattened
  * device tree on success.
  */
-static void *__unflatten_device_tree(const void *blob,
+void *__unflatten_device_tree(const void *blob,
 			      struct device_node *dad,
 			      struct device_node **mynodes,
 			      void *(*dt_alloc)(u64 size, u64 align),
@@ -1261,6 +1263,8 @@ void __init unflatten_device_tree(void)
 
 	/* Get pointer to "/chosen" and "/aliases" nodes for use everywhere */
 	of_alias_scan(early_init_dt_alloc_memory_arch);
+
+	unittest_unflatten_overlay_base();
 }
 
 /**

drivers/of/irq.c

@@ -102,7 +102,7 @@ int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq)
 	struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL;
 	__be32 initial_match_array[MAX_PHANDLE_ARGS];
 	const __be32 *match_array = initial_match_array;
-	const __be32 *tmp, *imap, *imask, dummy_imask[] = { [0 ... MAX_PHANDLE_ARGS] = ~0 };
+	const __be32 *tmp, *imap, *imask, dummy_imask[] = { [0 ... MAX_PHANDLE_ARGS] = cpu_to_be32(~0) };
 	u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0;
 	int imaplen, match, i, rc = -EINVAL;
 

drivers/of/of_numa.c

@@ -57,6 +57,8 @@ static void __init of_numa_parse_cpu_nodes(void)
 		else
 			node_set(nid, numa_nodes_parsed);
 	}
+
+	of_node_put(cpus);
 }
 
 static int __init of_numa_parse_memory_nodes(void)

drivers/of/of_private.h

@@ -55,6 +55,18 @@ static inline int of_property_notify(int action, struct device_node *np,
 }
 #endif /* CONFIG_OF_DYNAMIC */
 
+#if defined(CONFIG_OF_UNITTEST) && defined(CONFIG_OF_OVERLAY)
+extern void __init unittest_unflatten_overlay_base(void);
+#else
+static inline void unittest_unflatten_overlay_base(void) {};
+#endif
+
+extern void *__unflatten_device_tree(const void *blob,
+			      struct device_node *dad,
+			      struct device_node **mynodes,
+			      void *(*dt_alloc)(u64 size, u64 align),
+			      bool detached);
+
 /**
  * General utilities for working with live trees.
  *

drivers/of/of_reserved_mem.c

@@ -197,7 +197,7 @@ static int __init __reserved_mem_init_node(struct reserved_mem *rmem)
 	const struct of_device_id *i;
 
 	for (i = __reservedmem_of_table; i < &__rmem_of_table_sentinel; i++) {
-		reservedmem_of_init_fn initfn = i->data;
+		int const (*initfn)(struct reserved_mem *rmem) = i->data;
 		const char *compat = i->compatible;
 
 		if (!of_flat_dt_is_compatible(rmem->fdt_node, compat))

drivers/of/resolver.c

@@ -92,7 +92,7 @@ static void adjust_overlay_phandles(struct device_node *overlay,
 		if (phandle == OF_PHANDLE_ILLEGAL)
 			continue;
 
-		*(uint32_t *)prop->value = cpu_to_be32(overlay->phandle);
+		*(__be32 *)prop->value = cpu_to_be32(overlay->phandle);
 	}
 
 	for_each_child_of_node(overlay, child)

drivers/of/unittest-data/Makefile

 obj-y += testcases.dtb.o
+obj-y += overlay.dtb.o
+obj-y += overlay_bad_phandle.dtb.o
+obj-y += overlay_base.dtb.o
 
 targets += testcases.dtb testcases.dtb.S
+targets += overlay.dtb overlay.dtb.S
+targets += overlay_bad_phandle.dtb overlay_bad_phandle.dtb.S
+targets += overlay_base.dtb overlay_base.dtb.S
 
-.SECONDARY: \
-	$(obj)/testcases.dtb.S \
-	$(obj)/testcases.dtb
+.PRECIOUS: \
+	$(obj)/%.dtb.S \
+	$(obj)/%.dtb
+
+# enable creation of __symbols__ node
+DTC_FLAGS_overlay := -@
+DTC_FLAGS_overlay_bad_phandle := -@
+DTC_FLAGS_overlay_base := -@

drivers/of/unittest-data/overlay.dts

+/dts-v1/;
+/plugin/;
+
+/ {
+
+	fragment@0 {
+		target = <&electric_1>;
+
+		__overlay__ {
+			status = "ok";
+
+			hvac_2: hvac-large-1 {
+				compatible = "ot,hvac-large";
+				heat-range = < 40 75 >;
+				cool-range = < 65 80 >;
+			};
+		};
+	};
+
+	fragment@1 {
+		target = <&rides_1>;
+
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			status = "ok";
+
+			ride@200 {
+				compatible = "ot,ferris-wheel";
+				reg = < 0x00000200 0x100 >;
+				hvac-provider = < &hvac_2 >;
+				hvac-thermostat = < 27 32 > ;
+				hvac-zones = < 12 5 >;
+				hvac-zone-names = "operator", "snack-bar";
+				spin-controller = < &spin_ctrl_1 3 >;
+				spin-rph = < 30 >;
+				gondolas = < 16 >;
+				gondola-capacity = < 6 >;
+			};
+		};
+	};
+
+	fragment@2 {
+		target = <&lights_2>;
+
+		__overlay__ {
+			status = "ok";
+			color = "purple", "white", "red", "green";
+			rate = < 3 256 >;
+		};
+	};
+
+};

drivers/of/unittest-data/overlay_bad_phandle.dts

+/dts-v1/;
+/plugin/;
+
+/ {
+
+	fragment@0 {
+		target = <&electric_1>;
+
+		__overlay__ {
+
+			// This label should cause an error when the overlay
+			// is applied.  There is already a phandle value
+			// in the base tree for motor-1.
+			spin_ctrl_1_conflict: motor-1 {
+				accelerate = < 3 >;
+				decelerate = < 5 >;
+			};
+		};
+	};
+};

drivers/of/unittest-data/overlay_base.dts

+/dts-v1/;
+/plugin/;
+
+/*
+ * Base device tree that overlays will be applied against.
+ *
+ * Do not add any properties in node "/".
+ * Do not add any nodes other than "/testcase-data-2" in node "/".
+ * Do not add anything that would result in dtc creating node "/__fixups__".
+ * dtc will create nodes "/__symbols__" and "/__local_fixups__".
+ */
+
+/ {
+	testcase-data-2 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		electric_1: substation@100 {
+			compatible = "ot,big-volts-control";
+			reg = < 0x00000100 0x100 >;
+			status = "disabled";
+
+			hvac_1: hvac-medium-1 {
+				compatible = "ot,hvac-medium";
+				heat-range = < 50 75 >;
+				cool-range = < 60 80 >;
+			};
+
+			spin_ctrl_1: motor-1 {
+				compatible = "ot,ferris-wheel-motor";
+				spin = "clockwise";
+			};
+
+			spin_ctrl_2: motor-8 {
+				compatible = "ot,roller-coaster-motor";
+			};
+		};
+
+		rides_1: fairway-1 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "ot,rides";
+			status = "disabled";
+			orientation = < 127 >;
+
+			ride@100 {
+				compatible = "ot,roller-coaster";
+				reg = < 0x00000100 0x100 >;
+				hvac-provider = < &hvac_1 >;
+				hvac-thermostat = < 29 > ;
+				hvac-zones = < 14 >;
+				hvac-zone-names = "operator";
+				spin-controller = < &spin_ctrl_2 5 &spin_ctrl_2 7 >;
+				spin-controller-names = "track_1", "track_2";
+				queues = < 2 >;
+			};
+		};
+
+		lights_1: lights@30000 {
+			compatible = "ot,work-lights";
+			reg = < 0x00030000 0x1000 >;
+			status = "disabled";
+		};
+
+		lights_2: lights@40000 {
+			compatible = "ot,show-lights";
+			reg = < 0x00040000 0x1000 >;
+			status = "disabled";
+			rate = < 13 138 >;
+		};
+
+		retail_1: vending@50000 {
+			reg = < 0x00050000 0x1000 >;
+			compatible = "ot,tickets";
+			status = "disabled";
+		};
+
+	};
+};
+

drivers/of/unittest.c

@@ -8,6 +8,7 @@
 #include <linux/err.h>
 #include <linux/errno.h>
 #include <linux/hashtable.h>
+#include <linux/libfdt.h>
 #include <linux/of.h>
 #include <linux/of_fdt.h>
 #include <linux/of_irq.h>
@@ -1925,6 +1926,324 @@ static void __init of_unittest_overlay(void)
 static inline void __init of_unittest_overlay(void) { }
 #endif
 
+/*
+ * __dtb_ot_begin[] and __dtb_ot_end[] are created by cmd_dt_S_dtb
+ * in scripts/Makefile.lib
+ */
+
+#define OVERLAY_INFO_EXTERN(name) \
+	extern uint8_t __dtb_##name##_begin[]; \
+	extern uint8_t __dtb_##name##_end[]
+
+#define OVERLAY_INFO(name, expected) \
+{	.dtb_begin	 = __dtb_##name##_begin, \
+	.dtb_end	 = __dtb_##name##_end, \
+	.expected_result = expected, \
+}
+
+struct overlay_info {
+	uint8_t		   *dtb_begin;
+	uint8_t		   *dtb_end;
+	void		   *data;
+	struct device_node *np_overlay;
+	int		   expected_result;
+	int		   overlay_id;
+};
+
+OVERLAY_INFO_EXTERN(overlay_base);
+OVERLAY_INFO_EXTERN(overlay);
+OVERLAY_INFO_EXTERN(overlay_bad_phandle);
+
+#ifdef CONFIG_OF_OVERLAY
+
+/* order of entries is hard-coded into users of overlays[] */
+static struct overlay_info overlays[] = {
+	OVERLAY_INFO(overlay_base, -9999),
+	OVERLAY_INFO(overlay, 0),
+	OVERLAY_INFO(overlay_bad_phandle, -EINVAL),
+	{}
+};
+
+static struct device_node *overlay_base_root;
+
+/*
+ * Create base device tree for the overlay unittest.
+ *
+ * This is called from very early boot code.
+ *
+ * Do as much as possible the same way as done in __unflatten_device_tree
+ * and other early boot steps for the normal FDT so that the overlay base
+ * unflattened tree will have the same characteristics as the real tree
+ * (such as having memory allocated by the early allocator).  The goal
+ * is to test "the real thing" as much as possible, and test "test setup
+ * code" as little as possible.
+ *
+ * Have to stop before resolving phandles, because that uses kmalloc.
+ */
+void __init unittest_unflatten_overlay_base(void)
+{
+	struct overlay_info *info;
+	u32 data_size;
+	u32 size;
+
+	info = &overlays[0];
+
+	if (info->expected_result != -9999) {
+		pr_err("No dtb 'overlay_base' to attach\n");
+		return;
+	}
+
+	data_size = info->dtb_end - info->dtb_begin;
+	if (!data_size) {
+		pr_err("No dtb 'overlay_base' to attach\n");
+		return;
+	}
+
+	size = fdt_totalsize(info->dtb_begin);
+	if (size != data_size) {
+		pr_err("dtb 'overlay_base' header totalsize != actual size");
+		return;
+	}
+
+	info->data = early_init_dt_alloc_memory_arch(size,
+					     roundup_pow_of_two(FDT_V17_SIZE));
+	if (!info->data) {
+		pr_err("alloc for dtb 'overlay_base' failed");
+		return;
+	}
+
+	memcpy(info->data, info->dtb_begin, size);
+
+	__unflatten_device_tree(info->data, NULL, &info->np_overlay,
+				early_init_dt_alloc_memory_arch, true);
+	overlay_base_root = info->np_overlay;
+}
+
+/*
+ * The purpose of of_unittest_overlay_data_add is to add an
+ * overlay in the normal fashion.  This is a test of the whole
+ * picture, instead of testing individual elements.
+ *
+ * A secondary purpose is to be able to verify that the contents of
+ * /proc/device-tree/ contains the updated structure and values from
+ * the overlay.  That must be verified separately in user space.
+ *
+ * Return 0 on unexpected error.
+ */
+static int __init overlay_data_add(int onum)
+{
+	struct overlay_info *info;
+	int k;
+	int ret;
+	u32 size;
+	u32 size_from_header;
+
+	for (k = 0, info = overlays; info; info++, k++) {
+		if (k == onum)
+			break;
+	}
+	if (onum > k)
+		return 0;
+
+	size = info->dtb_end - info->dtb_begin;
+	if (!size) {
+		pr_err("no overlay to attach, %d\n", onum);
+		ret = 0;
+	}
+
+	size_from_header = fdt_totalsize(info->dtb_begin);
+	if (size_from_header != size) {
+		pr_err("overlay header totalsize != actual size, %d", onum);
+		return 0;
+	}
+
+	/*
+	 * Must create permanent copy of FDT because of_fdt_unflatten_tree()
+	 * will create pointers to the passed in FDT in the EDT.
+	 */
+	info->data = kmemdup(info->dtb_begin, size, GFP_KERNEL);
+	if (!info->data) {
+		pr_err("unable to allocate memory for data, %d\n", onum);
+		return 0;
+	}
+
+	of_fdt_unflatten_tree(info->data, NULL, &info->np_overlay);
+	if (!info->np_overlay) {
+		pr_err("unable to unflatten overlay, %d\n", onum);
+		ret = 0;
+		goto out_free_data;
+	}
+	of_node_set_flag(info->np_overlay, OF_DETACHED);
+
+	ret = of_resolve_phandles(info->np_overlay);
+	if (ret) {
+		pr_err("resolve ot phandles (ret=%d), %d\n", ret, onum);
+		goto out_free_np_overlay;
+	}
+
+	ret = of_overlay_create(info->np_overlay);
+	if (ret < 0) {
+		pr_err("of_overlay_create() (ret=%d), %d\n", ret, onum);
+		goto out_free_np_overlay;
+	} else {
+		info->overlay_id = ret;
+		ret = 0;
+	}
+
+	pr_debug("__dtb_overlay_begin applied, overlay id %d\n", ret);
+
+	goto out;
+
+out_free_np_overlay:
+	/*
+	 * info->np_overlay is the unflattened device tree
+	 * It has not been spliced into the live tree.
+	 */
+
+	/* todo: function to free unflattened device tree */
+
+out_free_data:
+	kfree(info->data);
+
+out:
+	return (ret == info->expected_result);
+}
+
+/*
+ * The purpose of of_unittest_overlay_high_level is to add an overlay
+ * in the normal fashion.  This is a test of the whole picture,
+ * instead of individual elements.
+ *
+ * The first part of the function is _not_ normal overlay usage; it is
+ * finishing splicing the base overlay device tree into the live tree.
+ */
+static __init void of_unittest_overlay_high_level(void)
+{
+	struct device_node *last_sibling;
+	struct device_node *np;
+	struct device_node *of_symbols;
+	struct device_node *overlay_base_symbols;
+	struct device_node **pprev;
+	struct property *prop;
+	int ret;
+
+	if (!overlay_base_root) {
+		unittest(0, "overlay_base_root not initialized\n");
+		return;
+	}
+
+	/*
+	 * Could not fixup phandles in unittest_unflatten_overlay_base()
+	 * because kmalloc() was not yet available.
+	 */
+	of_resolve_phandles(overlay_base_root);
+
+	/*
+	 * do not allow overlay_base to duplicate any node already in
+	 * tree, this greatly simplifies the code
+	 */
+
+	/*
+	 * remove overlay_base_root node "__local_fixups", after
+	 * being used by of_resolve_phandles()
+	 */
+	pprev = &overlay_base_root->child;
+	for (np = overlay_base_root->child; np; np = np->sibling) {
+		if (!of_node_cmp(np->name, "__local_fixups__")) {
+			*pprev = np->sibling;
+			break;
+		}
+		pprev = &np->sibling;
+	}
+
+	/* remove overlay_base_root node "__symbols__" if in live tree */
+	of_symbols = of_get_child_by_name(of_root, "__symbols__");
+	if (of_symbols) {
+		/* will have to graft properties from node into live tree */
+		pprev = &overlay_base_root->child;
+		for (np = overlay_base_root->child; np; np = np->sibling) {
+			if (!of_node_cmp(np->name, "__symbols__")) {
+				overlay_base_symbols = np;
+				*pprev = np->sibling;
+				break;
+			}
+			pprev = &np->sibling;
+		}
+	}
+
+	for (np = overlay_base_root->child; np; np = np->sibling) {
+		if (of_get_child_by_name(of_root, np->name)) {
+			unittest(0, "illegal node name in overlay_base %s",
+				np->name);
+			return;
+		}
+	}
+
+	/*
+	 * overlay 'overlay_base' is not allowed to have root
+	 * properties, so only need to splice nodes into main device tree.
+	 *
+	 * root node of *overlay_base_root will not be freed, it is lost
+	 * memory.
+	 */
+
+	for (np = overlay_base_root->child; np; np = np->sibling)
+		np->parent = of_root;
+
+	mutex_lock(&of_mutex);
+
+	for (last_sibling = np = of_root->child; np; np = np->sibling)
+		last_sibling = np;
+
+	if (last_sibling)
+		last_sibling->sibling = overlay_base_root->child;
+	else
+		of_root->child = overlay_base_root->child;
+
+	for_each_of_allnodes_from(overlay_base_root, np)
+		__of_attach_node_sysfs(np);
+
+	if (of_symbols) {
+		for_each_property_of_node(overlay_base_symbols, prop) {
+			ret = __of_add_property(of_symbols, prop);
+			if (ret) {
+				unittest(0,
+					 "duplicate property '%s' in overlay_base node __symbols__",
+					 prop->name);
+				goto err_unlock;
+			}
+			ret = __of_add_property_sysfs(of_symbols, prop);
+			if (ret) {
+				unittest(0,
+					 "unable to add property '%s' in overlay_base node __symbols__ to sysfs",
+					 prop->name);
+				goto err_unlock;
+			}
+		}
+	}
+
+	mutex_unlock(&of_mutex);
+
+
+	/* now do the normal overlay usage test */
+
+	unittest(overlay_data_add(1),
+		 "Adding overlay 'overlay' failed\n");
+
+	unittest(overlay_data_add(2),
+		 "Adding overlay 'overlay_bad_phandle' failed\n");
+	return;
+
+err_unlock:
+	mutex_unlock(&of_mutex);
+}
+
+#else
+
+static inline __init void of_unittest_overlay_high_level(void) {}
+
+#endif
+
 static int __init of_unittest(void)
 {
 	struct device_node *np;
@@ -1962,6 +2281,8 @@ static int __init of_unittest(void)
 	/* Double check linkage after removing testcase data */
 	of_unittest_check_tree_linkage();
 
+	of_unittest_overlay_high_level();
+
 	pr_info("end of unittest - %i passed, %i failed\n",
 		unittest_results.passed, unittest_results.failed);
 

drivers/tty/serdev/core.c

@@ -224,10 +224,7 @@ static int serdev_drv_remove(struct device *dev)
 static ssize_t modalias_show(struct device *dev,
 			     struct device_attribute *attr, char *buf)
 {
-	ssize_t len = of_device_get_modalias(dev, buf, PAGE_SIZE - 2);
-	buf[len] = '\n';
-	buf[len+1] = 0;
-	return len+1;
+	return of_device_modalias(dev, buf, PAGE_SIZE);
 }
 
 static struct device_attribute serdev_device_attrs[] = {

drivers/usb/common/ulpi.c

@@ -107,7 +107,7 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
 	int len;
 	struct ulpi *ulpi = to_ulpi_dev(dev);
 
-	len = of_device_get_modalias(dev, buf, PAGE_SIZE - 1);
+	len = of_device_modalias(dev, buf, PAGE_SIZE);
 	if (len != -ENODEV)
 		return len;
 

include/linux/of_device.h

@@ -34,8 +34,7 @@ extern void of_device_unregister(struct platform_device *ofdev);
 
 extern const void *of_device_get_match_data(const struct device *dev);
 
-extern ssize_t of_device_get_modalias(struct device *dev,
-					char *str, ssize_t len);
+extern ssize_t of_device_modalias(struct device *dev, char *str, ssize_t len);
 extern int of_device_request_module(struct device *dev);
 
 extern void of_device_uevent(struct device *dev, struct kobj_uevent_env *env);
@@ -72,7 +71,7 @@ static inline const void *of_device_get_match_data(const struct device *dev)
 	return NULL;
 }
 
-static inline int of_device_get_modalias(struct device *dev,
+static inline int of_device_modalias(struct device *dev,
 				     char *str, ssize_t len)
 {
 	return -ENODEV;

include/linux/of_irq.h

@@ -8,7 +8,7 @@
 #include <linux/ioport.h>
 #include <linux/of.h>
 
-typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
+typedef int const (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
 
 /*
  * Workarounds only applied to 32bit powermac machines

scripts/Makefile.lib

@@ -280,9 +280,21 @@ DTC ?= $(objtree)/scripts/dtc/dtc
 
 # Disable noisy checks by default
 ifeq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),)
-DTC_FLAGS += -Wno-unit_address_vs_reg
+DTC_FLAGS += -Wno-unit_address_vs_reg \
+	-Wno-simple_bus_reg \
+	-Wno-unit_address_format \
+	-Wno-pci_bridge \
+	-Wno-pci_device_bus_num \
+	-Wno-pci_device_reg
 endif
 
+ifeq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),2)
+DTC_FLAGS += -Wnode_name_chars_strict \
+	-Wproperty_name_chars_strict
+endif
+
+DTC_FLAGS += $(DTC_FLAGS_$(basetarget))
+
 # Generate an assembly file to wrap the output of the device tree compiler
 quiet_cmd_dt_S_dtb= DTB     $@
 cmd_dt_S_dtb=						\

scripts/dtc/data.c

@@ -171,9 +171,9 @@ struct data data_merge(struct data d1, struct data d2)
 struct data data_append_integer(struct data d, uint64_t value, int bits)
 {
 	uint8_t value_8;
-	uint16_t value_16;
-	uint32_t value_32;
-	uint64_t value_64;
+	fdt16_t value_16;
+	fdt32_t value_32;
+	fdt64_t value_64;
 
 	switch (bits) {
 	case 8:
@@ -197,14 +197,14 @@ struct data data_append_integer(struct data d, uint64_t value, int bits)
 	}
 }
 
-struct data data_append_re(struct data d, const struct fdt_reserve_entry *re)
+struct data data_append_re(struct data d, uint64_t address, uint64_t size)
 {
-	struct fdt_reserve_entry bere;
+	struct fdt_reserve_entry re;
 
-	bere.address = cpu_to_fdt64(re->address);
-	bere.size = cpu_to_fdt64(re->size);
+	re.address = cpu_to_fdt64(address);
+	re.size = cpu_to_fdt64(size);
 
-	return data_append_data(d, &bere, sizeof(bere));
+	return data_append_data(d, &re, sizeof(re));
 }
 
 struct data data_append_cell(struct data d, cell_t word)

scripts/dtc/dtc-lexer.l

@@ -62,7 +62,8 @@ static int dts_version = 1;
 
 static void push_input_file(const char *filename);
 static bool pop_input_file(void);
-static void lexical_error(const char *fmt, ...);
+static void PRINTF(1, 2) lexical_error(const char *fmt, ...);
+
 %}
 
 %%

scripts/dtc/dtc-lexer.lex.c_shipped

@@ -655,8 +655,9 @@ static int dts_version = 1;
 
 static void push_input_file(const char *filename);
 static bool pop_input_file(void);
-static void lexical_error(const char *fmt, ...);
-#line 660 "dtc-lexer.lex.c"
+static void PRINTF(1, 2) lexical_error(const char *fmt, ...);
+
+#line 661 "dtc-lexer.lex.c"
 
 #define INITIAL 0
 #define BYTESTRING 1
@@ -878,9 +879,9 @@ YY_DECL
 		}
 
 	{
-#line 68 "dtc-lexer.l"
+#line 69 "dtc-lexer.l"
 
-#line 884 "dtc-lexer.lex.c"
+#line 885 "dtc-lexer.lex.c"
 
 	while ( /*CONSTCOND*/1 )		/* loops until end-of-file is reached */
 		{
@@ -937,7 +938,7 @@ do_action:	/* This label is used only to access EOF actions. */
 case 1:
 /* rule 1 can match eol */
 YY_RULE_SETUP
-#line 69 "dtc-lexer.l"
+#line 70 "dtc-lexer.l"
 {
 			char *name = strchr(yytext, '\"') + 1;
 			yytext[yyleng-1] = '\0';
@@ -947,7 +948,7 @@ YY_RULE_SETUP
 case 2:
 /* rule 2 can match eol */
 YY_RULE_SETUP
-#line 75 "dtc-lexer.l"
+#line 76 "dtc-lexer.l"
 {
 			char *line, *fnstart, *fnend;
 			struct data fn;
@@ -981,7 +982,7 @@ case YY_STATE_EOF(INITIAL):
 case YY_STATE_EOF(BYTESTRING):
 case YY_STATE_EOF(PROPNODENAME):
 case YY_STATE_EOF(V1):
-#line 104 "dtc-lexer.l"
+#line 105 "dtc-lexer.l"
 {
 			if (!pop_input_file()) {
 				yyterminate();
@@ -991,7 +992,7 @@ case YY_STATE_EOF(V1):
 case 3:
 /* rule 3 can match eol */
 YY_RULE_SETUP
-#line 110 "dtc-lexer.l"
+#line 111 "dtc-lexer.l"
 {
 			DPRINT("String: %s\n", yytext);
 			yylval.data = data_copy_escape_string(yytext+1,
@@ -1001,7 +1002,7 @@ YY_RULE_SETUP
 	YY_BREAK
 case 4:
 YY_RULE_SETUP
-#line 117 "dtc-lexer.l"
+#line 118 "dtc-lexer.l"
 {
 			DPRINT("Keyword: /dts-v1/\n");
 			dts_version = 1;
@@ -1011,7 +1012,7 @@ YY_RULE_SETUP
 	YY_BREAK
 case 5:
 YY_RULE_SETUP
-#line 124 "dtc-lexer.l"
+#line 125 "dtc-lexer.l"
 {
 			DPRINT("Keyword: /plugin/\n");
 			return DT_PLUGIN;
@@ -1019,7 +1020,7 @@ YY_RULE_SETUP
 	YY_BREAK
 case 6:
 YY_RULE_SETUP
-#line 129 "dtc-lexer.l"
+#line 130 "dtc-lexer.l"
 {
 			DPRINT("Keyword: /memreserve/\n");
 			BEGIN_DEFAULT();
@@ -1028,7 +1029,7 @@ YY_RULE_SETUP
 	YY_BREAK
 case 7:
 YY_RULE_SETUP
-#line 135 "dtc-lexer.l"
+#line 136 "dtc-lexer.l"
 {
 			DPRINT("Keyword: /bits/\n");
 			BEGIN_DEFAULT();
@@ -1037,7 +1038,7 @@ YY_RULE_SETUP
 	YY_BREAK
 case 8:
 YY_RULE_SETUP
-#line 141 "dtc-lexer.l"
+#line 142 "dtc-lexer.l"
 {
 			DPRINT("Keyword: /delete-property/\n");
 			DPRINT("<PROPNODENAME>\n");
@@ -1047,7 +1048,7 @@ YY_RULE_SETUP
 	YY_BREAK
 case 9:
 YY_RULE_SETUP
-#line 148 "dtc-lexer.l"
+#line 149 "dtc-lexer.l"
 {
 			DPRINT("Keyword: /delete-node/\n");
 			DPRINT("<PROPNODENAME>\n");
@@ -1057,7 +1058,7 @@ YY_RULE_SETUP
 	YY_BREAK
 case 10:
 YY_RULE_SETUP
-#line 155 "dtc-lexer.l"
+#line 156 "dtc-lexer.l"
 {
 			DPRINT("Label: %s\n", yytext);
 			yylval.labelref = xstrdup(yytext);
@@ -1067,7 +1068,7 @@ YY_RULE_SETUP
 	YY_BREAK
 case 11:
 YY_RULE_SETUP
-#line 162 "dtc-lexer.l"
+#line 163 "dtc-lexer.l"
 {
 			char *e;
 			DPRINT("Integer Literal: '%s'\n", yytext);
@@ -1093,7 +1094,7 @@ YY_RULE_SETUP
 case 12:
 /* rule 12 can match eol */
 YY_RULE_SETUP
-#line 184 "dtc-lexer.l"
+#line 185 "dtc-lexer.l"
 {
 			struct data d;
 			DPRINT("Character literal: %s\n", yytext);
@@ -1117,7 +1118,7 @@ YY_RULE_SETUP
 	YY_BREAK
 case 13:
 YY_RULE_SETUP
-#line 205 "dtc-lexer.l"
+#line 206 "dtc-lexer.l"
 {	/* label reference */
 			DPRINT("Ref: %s\n", yytext+1);
 			yylval.labelref = xstrdup(yytext+1);
@@ -1126,7 +1127,7 @@ YY_RULE_SETUP
 	YY_BREAK
 case 14:
 YY_RULE_SETUP
-#line 211 "dtc-lexer.l"
+#line 212 "dtc-lexer.l"
 {	/* new-style path reference */
 			yytext[yyleng-1] = '\0';
 			DPRINT("Ref: %s\n", yytext+2);
@@ -1136,7 +1137,7 @@ YY_RULE_SETUP
 	YY_BREAK
 case 15:
 YY_RULE_SETUP
-#line 218 "dtc-lexer.l"
+#line 219 "dtc-lexer.l"
 {
 			yylval.byte = strtol(yytext, NULL, 16);
 			DPRINT("Byte: %02x\n", (int)yylval.byte);
@@ -1145,7 +1146,7 @@ YY_RULE_SETUP
 	YY_BREAK
 case 16:
 YY_RULE_SETUP
-#line 224 "dtc-lexer.l"
+#line 225 "dtc-lexer.l"
 {
 			DPRINT("/BYTESTRING\n");
 			BEGIN_DEFAULT();
@@ -1154,7 +1155,7 @@ YY_RULE_SETUP
 	YY_BREAK
 case 17:
 YY_RULE_SETUP
-#line 230 "dtc-lexer.l"
+#line 231 "dtc-lexer.l"
 {
 			DPRINT("PropNodeName: %s\n", yytext);
 			yylval.propnodename = xstrdup((yytext[0] == '\\') ?
@@ -1165,7 +1166,7 @@ YY_RULE_SETUP
 	YY_BREAK
 case 18:
 YY_RULE_SETUP
-#line 238 "dtc-lexer.l"
+#line 239 "dtc-lexer.l"
 {
 			DPRINT("Binary Include\n");
 			return DT_INCBIN;
@@ -1174,64 +1175,64 @@ YY_RULE_SETUP
 case 19:
 /* rule 19 can match eol */
 YY_RULE_SETUP
-#line 243 "dtc-lexer.l"
+#line 244 "dtc-lexer.l"
 /* eat whitespace */
 	YY_BREAK
 case 20:
 /* rule 20 can match eol */
 YY_RULE_SETUP
-#line 244 "dtc-lexer.l"
+#line 245 "dtc-lexer.l"
 /* eat C-style comments */
 	YY_BREAK
 case 21:
 /* rule 21 can match eol */
 YY_RULE_SETUP
-#line 245 "dtc-lexer.l"
+#line 246 "dtc-lexer.l"
 /* eat C++-style comments */
 	YY_BREAK
 case 22:
 YY_RULE_SETUP
-#line 247 "dtc-lexer.l"
+#line 248 "dtc-lexer.l"
 { return DT_LSHIFT; };
 	YY_BREAK
 case 23:
 YY_RULE_SETUP
-#line 248 "dtc-lexer.l"
+#line 249 "dtc-lexer.l"
 { return DT_RSHIFT; };
 	YY_BREAK
 case 24:
 YY_RULE_SETUP
-#line 249 "dtc-lexer.l"
+#line 250 "dtc-lexer.l"
 { return DT_LE; };
 	YY_BREAK
 case 25:
 YY_RULE_SETUP
-#line 250 "dtc-lexer.l"
+#line 251 "dtc-lexer.l"
 { return DT_GE; };
 	YY_BREAK
 case 26:
 YY_RULE_SETUP
-#line 251 "dtc-lexer.l"
+#line 252 "dtc-lexer.l"
 { return DT_EQ; };
 	YY_BREAK
 case 27:
 YY_RULE_SETUP
-#line 252 "dtc-lexer.l"
+#line 253 "dtc-lexer.l"
 { return DT_NE; };
 	YY_BREAK
 case 28:
 YY_RULE_SETUP
-#line 253 "dtc-lexer.l"
+#line 254 "dtc-lexer.l"
 { return DT_AND; };
 	YY_BREAK
 case 29:
 YY_RULE_SETUP
-#line 254 "dtc-lexer.l"
+#line 255 "dtc-lexer.l"
 { return DT_OR; };
 	YY_BREAK
 case 30:
 YY_RULE_SETUP
-#line 256 "dtc-lexer.l"
+#line 257 "dtc-lexer.l"
 {
 			DPRINT("Char: %c (\\x%02x)\n", yytext[0],
 				(unsigned)yytext[0]);
@@ -1249,10 +1250,10 @@ YY_RULE_SETUP
 	YY_BREAK
 case 31:
 YY_RULE_SETUP
-#line 271 "dtc-lexer.l"
+#line 272 "dtc-lexer.l"
 ECHO;
 	YY_BREAK
-#line 1256 "dtc-lexer.lex.c"
+#line 1257 "dtc-lexer.lex.c"
 
 	case YY_END_OF_BUFFER:
 		{
@@ -2218,7 +2219,7 @@ void yyfree (void * ptr )
 
 #define YYTABLES_NAME "yytables"
 
-#line 271 "dtc-lexer.l"
+#line 272 "dtc-lexer.l"
 
 
 

scripts/dtc/dtc-parser.tab.c_shipped

@@ -1557,10 +1557,10 @@ yyreduce:
     {
 			struct node *target = get_node_by_ref((yyvsp[-3].node), (yyvsp[-1].labelref));
 
+			if (target) {
 				add_label(&target->labels, (yyvsp[-2].labelref));
-			if (target)
 				merge_nodes(target, (yyvsp[0].node));
-			else
+			} else
 				ERROR(&(yylsp[-1]), "Label or path %s not found", (yyvsp[-1].labelref));
 			(yyval.node) = (yyvsp[-3].node);
 		}

scripts/dtc/dtc-parser.y

@@ -171,10 +171,10 @@ devicetree:
 		{
 			struct node *target = get_node_by_ref($1, $3);
 
+			if (target) {
 				add_label(&target->labels, $2);
-			if (target)
 				merge_nodes(target, $4);
-			else
+			} else
 				ERROR(&@3, "Label or path %s not found", $3);
 			$$ = $1;
 		}

scripts/dtc/dtc.c

@@ -138,7 +138,7 @@ static const char *guess_type_by_name(const char *fname, const char *fallback)
 static const char *guess_input_format(const char *fname, const char *fallback)
 {
 	struct stat statbuf;
-	uint32_t magic;
+	fdt32_t magic;
 	FILE *f;
 
 	if (stat(fname, &statbuf) != 0)
@@ -159,8 +159,7 @@ static const char *guess_input_format(const char *fname, const char *fallback)
 	}
 	fclose(f);
 
-	magic = fdt32_to_cpu(magic);
-	if (magic == FDT_MAGIC)
+	if (fdt32_to_cpu(magic) == FDT_MAGIC)
 		return "dtb";
 
 	return guess_type_by_name(fname, fallback);
@@ -216,7 +215,7 @@ int main(int argc, char *argv[])
 			alignsize = strtol(optarg, NULL, 0);
 			if (!is_power_of_2(alignsize))
 				die("Invalid argument \"%d\" to -a option\n",
-				    optarg);
+				    alignsize);
 			break;
 		case 'f':
 			force = true;
@@ -309,6 +308,8 @@ int main(int argc, char *argv[])
 	else
 		die("Unknown input format \"%s\"\n", inform);
 
+	dti->outname = outname;
+
 	if (depfile) {
 		fputc('\n', depfile);
 		fclose(depfile);

scripts/dtc/dtc.h

@@ -43,7 +43,6 @@
 #define debug(...)
 #endif
 
-
 #define DEFAULT_FDT_VERSION	17
 
 /*
@@ -114,7 +113,7 @@ struct data data_insert_at_marker(struct data d, struct marker *m,
 struct data data_merge(struct data d1, struct data d2);
 struct data data_append_cell(struct data d, cell_t word);
 struct data data_append_integer(struct data d, uint64_t word, int bits);
-struct data data_append_re(struct data d, const struct fdt_reserve_entry *re);
+struct data data_append_re(struct data d, uint64_t address, uint64_t size);
 struct data data_append_addr(struct data d, uint64_t addr);
 struct data data_append_byte(struct data d, uint8_t byte);
 struct data data_append_zeroes(struct data d, int len);
@@ -136,6 +135,10 @@ struct label {
 	struct label *next;
 };
 
+struct bus_type {
+	const char *name;
+};
+
 struct property {
 	bool deleted;
 	char *name;
@@ -162,6 +165,7 @@ struct node {
 	int addr_cells, size_cells;
 
 	struct label *labels;
+	const struct bus_type *bus;
 };
 
 #define for_each_label_withdel(l0, l) \
@@ -227,7 +231,7 @@ uint32_t guess_boot_cpuid(struct node *tree);
 /* Boot info (tree plus memreserve information */
 
 struct reserve_info {
-	struct fdt_reserve_entry re;
+	uint64_t address, size;
 
 	struct reserve_info *next;
 
@@ -246,6 +250,7 @@ struct dt_info {
 	struct reserve_info *reservelist;
 	uint32_t boot_cpuid_phys;
 	struct node *dt;		/* the device tree */
+	const char *outname;		/* filename being written to, "-" for stdout */
 };
 
 /* DTS version flags definitions */

scripts/dtc/flattree.c

@@ -49,7 +49,7 @@ static struct version_info {
 
 struct emitter {
 	void (*cell)(void *, cell_t);
-	void (*string)(void *, char *, int);
+	void (*string)(void *, const char *, int);
 	void (*align)(void *, int);
 	void (*data)(void *, struct data);
 	void (*beginnode)(void *, struct label *labels);
@@ -64,7 +64,7 @@ static void bin_emit_cell(void *e, cell_t val)
 	*dtbuf = data_append_cell(*dtbuf, val);
 }
 
-static void bin_emit_string(void *e, char *str, int len)
+static void bin_emit_string(void *e, const char *str, int len)
 {
 	struct data *dtbuf = e;
 
@@ -144,22 +144,14 @@ static void asm_emit_cell(void *e, cell_t val)
 		(val >> 8) & 0xff, val & 0xff);
 }
 
-static void asm_emit_string(void *e, char *str, int len)
+static void asm_emit_string(void *e, const char *str, int len)
 {
 	FILE *f = e;
-	char c = 0;
-
-	if (len != 0) {
-		/* XXX: ewww */
-		c = str[len];
-		str[len] = '\0';
-	}
 
+	if (len != 0)
+		fprintf(f, "\t.string\t\"%.*s\"\n", len, str);
+	else
 		fprintf(f, "\t.string\t\"%s\"\n", str);
-
-	if (len != 0) {
-		str[len] = c;
-	}
 }
 
 static void asm_emit_align(void *e, int a)
@@ -179,7 +171,7 @@ static void asm_emit_data(void *e, struct data d)
 		emit_offset_label(f, m->ref, m->offset);
 
 	while ((d.len - off) >= sizeof(uint32_t)) {
-		asm_emit_cell(e, fdt32_to_cpu(*((uint32_t *)(d.val+off))));
+		asm_emit_cell(e, fdt32_to_cpu(*((fdt32_t *)(d.val+off))));
 		off += sizeof(uint32_t);
 	}
 
@@ -318,17 +310,16 @@ static struct data flatten_reserve_list(struct reserve_info *reservelist,
 {
 	struct reserve_info *re;
 	struct data d = empty_data;
-	static struct fdt_reserve_entry null_re = {0,0};
 	int    j;
 
 	for (re = reservelist; re; re = re->next) {
-		d = data_append_re(d, &re->re);
+		d = data_append_re(d, re->address, re->size);
 	}
 	/*
 	 * Add additional reserved slots if the user asked for them.
 	 */
 	for (j = 0; j < reservenum; j++) {
-		d = data_append_re(d, &null_re);
+		d = data_append_re(d, 0, 0);
 	}
 
 	return d;
@@ -544,11 +535,11 @@ void dt_to_asm(FILE *f, struct dt_info *dti, int version)
 			fprintf(f, "\t.globl\t%s\n", l->label);
 			fprintf(f, "%s:\n", l->label);
 		}
-		ASM_EMIT_BELONG(f, "0x%08x", (unsigned int)(re->re.address >> 32));
+		ASM_EMIT_BELONG(f, "0x%08x", (unsigned int)(re->address >> 32));
 		ASM_EMIT_BELONG(f, "0x%08x",
-				(unsigned int)(re->re.address & 0xffffffff));
-		ASM_EMIT_BELONG(f, "0x%08x", (unsigned int)(re->re.size >> 32));
-		ASM_EMIT_BELONG(f, "0x%08x", (unsigned int)(re->re.size & 0xffffffff));
+				(unsigned int)(re->address & 0xffffffff));
+		ASM_EMIT_BELONG(f, "0x%08x", (unsigned int)(re->size >> 32));
+		ASM_EMIT_BELONG(f, "0x%08x", (unsigned int)(re->size & 0xffffffff));
 	}
 	for (i = 0; i < reservenum; i++) {
 		fprintf(f, "\t.long\t0, 0\n\t.long\t0, 0\n");
@@ -609,7 +600,7 @@ static void flat_read_chunk(struct inbuf *inb, void *p, int len)
 
 static uint32_t flat_read_word(struct inbuf *inb)
 {
-	uint32_t val;
+	fdt32_t val;
 
 	assert(((inb->ptr - inb->base) % sizeof(val)) == 0);
 
@@ -718,13 +709,15 @@ static struct reserve_info *flat_read_mem_reserve(struct inbuf *inb)
 	 * First pass, count entries.
 	 */
 	while (1) {
+		uint64_t address, size;
+
 		flat_read_chunk(inb, &re, sizeof(re));
-		re.address  = fdt64_to_cpu(re.address);
-		re.size = fdt64_to_cpu(re.size);
-		if (re.size == 0)
+		address  = fdt64_to_cpu(re.address);
+		size = fdt64_to_cpu(re.size);
+		if (size == 0)
 			break;
 
-		new = build_reserve_entry(re.address, re.size);
+		new = build_reserve_entry(address, size);
 		reservelist = add_reserve_entry(reservelist, new);
 	}
 
@@ -817,6 +810,7 @@ static struct node *unflatten_tree(struct inbuf *dtbuf,
 struct dt_info *dt_from_blob(const char *fname)
 {
 	FILE *f;
+	fdt32_t magic_buf, totalsize_buf;
 	uint32_t magic, totalsize, version, size_dt, boot_cpuid_phys;
 	uint32_t off_dt, off_str, off_mem_rsvmap;
 	int rc;
@@ -833,7 +827,7 @@ struct dt_info *dt_from_blob(const char *fname)
 
 	f = srcfile_relative_open(fname, NULL);
 
-	rc = fread(&magic, sizeof(magic), 1, f);
+	rc = fread(&magic_buf, sizeof(magic_buf), 1, f);
 	if (ferror(f))
 		die("Error reading DT blob magic number: %s\n",
 		    strerror(errno));
@@ -844,11 +838,11 @@ struct dt_info *dt_from_blob(const char *fname)
 			die("Mysterious short read reading magic number\n");
 	}
 
-	magic = fdt32_to_cpu(magic);
+	magic = fdt32_to_cpu(magic_buf);
 	if (magic != FDT_MAGIC)
 		die("Blob has incorrect magic number\n");
 
-	rc = fread(&totalsize, sizeof(totalsize), 1, f);
+	rc = fread(&totalsize_buf, sizeof(totalsize_buf), 1, f);
 	if (ferror(f))
 		die("Error reading DT blob size: %s\n", strerror(errno));
 	if (rc < 1) {
@@ -858,7 +852,7 @@ struct dt_info *dt_from_blob(const char *fname)
 			die("Mysterious short read reading blob size\n");
 	}
 
-	totalsize = fdt32_to_cpu(totalsize);
+	totalsize = fdt32_to_cpu(totalsize_buf);
 	if (totalsize < FDT_V1_SIZE)
 		die("DT blob size (%d) is too small\n", totalsize);
 

scripts/dtc/libfdt/fdt_rw.c

@@ -283,6 +283,7 @@ int fdt_setprop(void *fdt, int nodeoffset, const char *name,
 	if (err)
 		return err;
 
+	if (len)
 		memcpy(prop->data, val, len);
 	return 0;
 }

scripts/dtc/libfdt/libfdt.h

@@ -143,7 +143,9 @@
 /* Low-level functions (you probably don't need these)                */
 /**********************************************************************/
 
+#ifndef SWIG /* This function is not useful in Python */
 const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int checklen);
+#endif
 static inline void *fdt_offset_ptr_w(void *fdt, int offset, int checklen)
 {
 	return (void *)(uintptr_t)fdt_offset_ptr(fdt, offset, checklen);
@@ -210,7 +212,6 @@ int fdt_next_subnode(const void *fdt, int offset);
 /**********************************************************************/
 /* General functions                                                  */
 /**********************************************************************/
-
 #define fdt_get_header(fdt, field) \
 	(fdt32_to_cpu(((const struct fdt_header *)(fdt))->field))
 #define fdt_magic(fdt)			(fdt_get_header(fdt, magic))
@@ -354,8 +355,10 @@ int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size);
  * useful for finding subnodes based on a portion of a larger string,
  * such as a full path.
  */
+#ifndef SWIG /* Not available in Python */
 int fdt_subnode_offset_namelen(const void *fdt, int parentoffset,
 			       const char *name, int namelen);
+#endif
 /**
  * fdt_subnode_offset - find a subnode of a given node
  * @fdt: pointer to the device tree blob
@@ -391,7 +394,9 @@ int fdt_subnode_offset(const void *fdt, int parentoffset, const char *name);
  * Identical to fdt_path_offset(), but only consider the first namelen
  * characters of path as the path name.
  */
+#ifndef SWIG /* Not available in Python */
 int fdt_path_offset_namelen(const void *fdt, const char *path, int namelen);
+#endif
 
 /**
  * fdt_path_offset - find a tree node by its full path
@@ -550,10 +555,12 @@ const struct fdt_property *fdt_get_property_by_offset(const void *fdt,
  * Identical to fdt_get_property(), but only examine the first namelen
  * characters of name for matching the property name.
  */
+#ifndef SWIG /* Not available in Python */
 const struct fdt_property *fdt_get_property_namelen(const void *fdt,
 						    int nodeoffset,
 						    const char *name,
 						    int namelen, int *lenp);
+#endif
 
 /**
  * fdt_get_property - find a given property in a given node
@@ -624,8 +631,10 @@ static inline struct fdt_property *fdt_get_property_w(void *fdt, int nodeoffset,
  *		-FDT_ERR_BADSTRUCTURE,
  *		-FDT_ERR_TRUNCATED, standard meanings
  */
+#ifndef SWIG /* This function is not useful in Python */
 const void *fdt_getprop_by_offset(const void *fdt, int offset,
 				  const char **namep, int *lenp);
+#endif
 
 /**
  * fdt_getprop_namelen - get property value based on substring
@@ -638,6 +647,7 @@ const void *fdt_getprop_by_offset(const void *fdt, int offset,
  * Identical to fdt_getprop(), but only examine the first namelen
  * characters of name for matching the property name.
  */
+#ifndef SWIG /* Not available in Python */
 const void *fdt_getprop_namelen(const void *fdt, int nodeoffset,
 				const char *name, int namelen, int *lenp);
 static inline void *fdt_getprop_namelen_w(void *fdt, int nodeoffset,
@@ -647,6 +657,7 @@ static inline void *fdt_getprop_namelen_w(void *fdt, int nodeoffset,
 	return (void *)(uintptr_t)fdt_getprop_namelen(fdt, nodeoffset, name,
 						      namelen, lenp);
 }
+#endif
 
 /**
  * fdt_getprop - retrieve the value of a given property
@@ -707,8 +718,10 @@ uint32_t fdt_get_phandle(const void *fdt, int nodeoffset);
  * Identical to fdt_get_alias(), but only examine the first namelen
  * characters of name for matching the alias name.
  */
+#ifndef SWIG /* Not available in Python */
 const char *fdt_get_alias_namelen(const void *fdt,
 				  const char *name, int namelen);
+#endif
 
 /**
  * fdt_get_alias - retrieve the path referenced by a given alias
@@ -1106,10 +1119,12 @@ int fdt_size_cells(const void *fdt, int nodeoffset);
  * of the name. It is useful when you want to manipulate only one value of
  * an array and you have a string that doesn't end with \0.
  */
+#ifndef SWIG /* Not available in Python */
 int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset,
 					const char *name, int namelen,
 					uint32_t idx, const void *val,
 					int len);
+#endif
 
 /**
  * fdt_setprop_inplace - change a property's value, but not its size
@@ -1139,8 +1154,10 @@ int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset,
  *	-FDT_ERR_BADSTRUCTURE,
  *	-FDT_ERR_TRUNCATED, standard meanings
  */
+#ifndef SWIG /* Not available in Python */
 int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
 			const void *val, int len);
+#endif
 
 /**
  * fdt_setprop_inplace_u32 - change the value of a 32-bit integer property
@@ -1527,6 +1544,36 @@ static inline int fdt_setprop_cell(void *fdt, int nodeoffset, const char *name,
 #define fdt_setprop_string(fdt, nodeoffset, name, str) \
 	fdt_setprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)
 
+
+/**
+ * fdt_setprop_empty - set a property to an empty value
+ * @fdt: pointer to the device tree blob
+ * @nodeoffset: offset of the node whose property to change
+ * @name: name of the property to change
+ *
+ * fdt_setprop_empty() sets the value of the named property in the
+ * given node to an empty (zero length) value, or creates a new empty
+ * property if it does not already exist.
+ *
+ * This function may insert or delete data from the blob, and will
+ * therefore change the offsets of some existing nodes.
+ *
+ * returns:
+ *	0, on success
+ *	-FDT_ERR_NOSPACE, there is insufficient free space in the blob to
+ *		contain the new property value
+ *	-FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
+ *	-FDT_ERR_BADLAYOUT,
+ *	-FDT_ERR_BADMAGIC,
+ *	-FDT_ERR_BADVERSION,
+ *	-FDT_ERR_BADSTATE,
+ *	-FDT_ERR_BADSTRUCTURE,
+ *	-FDT_ERR_BADLAYOUT,
+ *	-FDT_ERR_TRUNCATED, standard meanings
+ */
+#define fdt_setprop_empty(fdt, nodeoffset, name) \
+	fdt_setprop((fdt), (nodeoffset), (name), NULL, 0)
+
 /**
  * fdt_appendprop - append to or create a property
  * @fdt: pointer to the device tree blob
@@ -1704,8 +1751,10 @@ int fdt_delprop(void *fdt, int nodeoffset, const char *name);
  * creating subnodes based on a portion of a larger string, such as a
  * full path.
  */
+#ifndef SWIG /* Not available in Python */
 int fdt_add_subnode_namelen(void *fdt, int parentoffset,
 			    const char *name, int namelen);
+#endif
 
 /**
  * fdt_add_subnode - creates a new node

scripts/dtc/libfdt/libfdt_env.h

@@ -58,16 +58,16 @@
 #include <string.h>
 
 #ifdef __CHECKER__
-#define __force __attribute__((force))
-#define __bitwise __attribute__((bitwise))
+#define FDT_FORCE __attribute__((force))
+#define FDT_BITWISE __attribute__((bitwise))
 #else
-#define __force
-#define __bitwise
+#define FDT_FORCE
+#define FDT_BITWISE
 #endif
 
-typedef uint16_t __bitwise fdt16_t;
-typedef uint32_t __bitwise fdt32_t;
-typedef uint64_t __bitwise fdt64_t;
+typedef uint16_t FDT_BITWISE fdt16_t;
+typedef uint32_t FDT_BITWISE fdt32_t;
+typedef uint64_t FDT_BITWISE fdt64_t;
 
 #define EXTRACT_BYTE(x, n)	((unsigned long long)((uint8_t *)&x)[n])
 #define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1))
@@ -80,29 +80,29 @@ typedef uint64_t __bitwise fdt64_t;
 
 static inline uint16_t fdt16_to_cpu(fdt16_t x)
 {
-	return (__force uint16_t)CPU_TO_FDT16(x);
+	return (FDT_FORCE uint16_t)CPU_TO_FDT16(x);
 }
 static inline fdt16_t cpu_to_fdt16(uint16_t x)
 {
-	return (__force fdt16_t)CPU_TO_FDT16(x);
+	return (FDT_FORCE fdt16_t)CPU_TO_FDT16(x);
 }
 
 static inline uint32_t fdt32_to_cpu(fdt32_t x)
 {
-	return (__force uint32_t)CPU_TO_FDT32(x);
+	return (FDT_FORCE uint32_t)CPU_TO_FDT32(x);
 }
 static inline fdt32_t cpu_to_fdt32(uint32_t x)
 {
-	return (__force fdt32_t)CPU_TO_FDT32(x);
+	return (FDT_FORCE fdt32_t)CPU_TO_FDT32(x);
 }
 
 static inline uint64_t fdt64_to_cpu(fdt64_t x)
 {
-	return (__force uint64_t)CPU_TO_FDT64(x);
+	return (FDT_FORCE uint64_t)CPU_TO_FDT64(x);
 }
 static inline fdt64_t cpu_to_fdt64(uint64_t x)
 {
-	return (__force fdt64_t)CPU_TO_FDT64(x);
+	return (FDT_FORCE fdt64_t)CPU_TO_FDT64(x);
 }
 #undef CPU_TO_FDT64
 #undef CPU_TO_FDT32

scripts/dtc/livetree.c

@@ -242,7 +242,7 @@ void delete_property_by_name(struct node *node, char *name)
 	struct property *prop = node->proplist;
 
 	while (prop) {
-		if (!strcmp(prop->name, name)) {
+		if (streq(prop->name, name)) {
 			delete_property(prop);
 			return;
 		}
@@ -275,7 +275,7 @@ void delete_node_by_name(struct node *parent, char *name)
 	struct node *node = parent->children;
 
 	while (node) {
-		if (!strcmp(node->name, name)) {
+		if (streq(node->name, name)) {
 			delete_node(node);
 			return;
 		}
@@ -319,8 +319,8 @@ struct reserve_info *build_reserve_entry(uint64_t address, uint64_t size)
 
 	memset(new, 0, sizeof(*new));
 
-	new->re.address = address;
-	new->re.size = size;
+	new->address = address;
+	new->size = size;
 
 	return new;
 }
@@ -393,7 +393,7 @@ struct property *get_property(struct node *node, const char *propname)
 cell_t propval_cell(struct property *prop)
 {
 	assert(prop->val.len == sizeof(cell_t));
-	return fdt32_to_cpu(*((cell_t *)prop->val.val));
+	return fdt32_to_cpu(*((fdt32_t *)prop->val.val));
 }
 
 struct property *get_property_by_label(struct node *tree, const char *label,
@@ -599,13 +599,13 @@ static int cmp_reserve_info(const void *ax, const void *bx)
 	a = *((const struct reserve_info * const *)ax);
 	b = *((const struct reserve_info * const *)bx);
 
-	if (a->re.address < b->re.address)
+	if (a->address < b->address)
 		return -1;
-	else if (a->re.address > b->re.address)
+	else if (a->address > b->address)
 		return 1;
-	else if (a->re.size < b->re.size)
+	else if (a->size < b->size)
 		return -1;
-	else if (a->re.size > b->re.size)
+	else if (a->size > b->size)
 		return 1;
 	else
 		return 0;
@@ -847,6 +847,8 @@ static void add_fixup_entry(struct dt_info *dti, struct node *fn,
 	xasprintf(&entry, "%s:%s:%u",
 			node->fullpath, prop->name, m->offset);
 	append_to_property(fn, m->ref, entry, strlen(entry) + 1);
+
+	free(entry);
 }
 
 static void generate_fixups_tree_internal(struct dt_info *dti,
@@ -900,7 +902,7 @@ static void add_local_fixup_entry(struct dt_info *dti,
 		struct node *refnode)
 {
 	struct node *wn, *nwn;	/* local fixup node, walk node, new */
-	uint32_t value_32;
+	fdt32_t value_32;
 	char **compp;
 	int i, depth;
 

scripts/dtc/srcpos.c

@@ -252,7 +252,7 @@ srcpos_string(struct srcpos *pos)
 	const char *fname = "<no-file>";
 	char *pos_str;
 
-	if (pos)
+	if (pos->file && pos->file->name)
 		fname = pos->file->name;
 
 

scripts/dtc/srcpos.h

@@ -22,6 +22,7 @@
 
 #include <stdio.h>
 #include <stdbool.h>
+#include "util.h"
 
 struct srcfile_state {
 	FILE *f;
@@ -106,12 +107,10 @@ extern void srcpos_update(struct srcpos *pos, const char *text, int len);
 extern struct srcpos *srcpos_copy(struct srcpos *pos);
 extern char *srcpos_string(struct srcpos *pos);
 
-extern void srcpos_verror(struct srcpos *pos, const char *prefix,
-			  const char *fmt, va_list va)
-	__attribute__((format(printf, 3, 0)));
-extern void srcpos_error(struct srcpos *pos, const char *prefix,
-			 const char *fmt, ...)
-	__attribute__((format(printf, 3, 4)));
+extern void PRINTF(3, 0) srcpos_verror(struct srcpos *pos, const char *prefix,
+					const char *fmt, va_list va);
+extern void PRINTF(3, 4) srcpos_error(struct srcpos *pos, const char *prefix,
+				      const char *fmt, ...);
 
 extern void srcpos_set_line(char *f, int l);
 

scripts/dtc/treesource.c

@@ -137,7 +137,7 @@ static void write_propval_string(FILE *f, struct data val)
 static void write_propval_cells(FILE *f, struct data val)
 {
 	void *propend = val.val + val.len;
-	cell_t *cp = (cell_t *)val.val;
+	fdt32_t *cp = (fdt32_t *)val.val;
 	struct marker *m = val.markers;
 
 	fprintf(f, "<");
@@ -275,8 +275,8 @@ void dt_to_source(FILE *f, struct dt_info *dti)
 		for_each_label(re->labels, l)
 			fprintf(f, "%s: ", l->label);
 		fprintf(f, "/memreserve/\t0x%016llx 0x%016llx;\n",
-			(unsigned long long)re->re.address,
-			(unsigned long long)re->re.size);
+			(unsigned long long)re->address,
+			(unsigned long long)re->size);
 	}
 
 	write_tree_source_node(f, dti->dt, 0);

scripts/dtc/update-dtc-source.sh

@@ -36,10 +36,19 @@ DTC_SOURCE="checks.c data.c dtc.c dtc.h flattree.c fstree.c livetree.c srcpos.c
 DTC_GENERATED="dtc-lexer.lex.c dtc-parser.tab.c dtc-parser.tab.h"
 LIBFDT_SOURCE="Makefile.libfdt fdt.c fdt.h fdt_empty_tree.c fdt_ro.c fdt_rw.c fdt_strerror.c fdt_sw.c fdt_wip.c libfdt.h libfdt_env.h libfdt_internal.h"
 
+get_last_dtc_version() {
+	git log --oneline scripts/dtc/ | grep 'upstream' | head -1 | sed -e 's/^.* \(.*\)/\1/'
+}
+
+last_dtc_ver=$(get_last_dtc_version)
+
 # Build DTC
 cd $DTC_UPSTREAM_PATH
 make clean
 make check
+dtc_version=$(git describe HEAD)
+dtc_log=$(git log --oneline ${last_dtc_ver}..)
+
 
 # Copy the files into the Linux tree
 cd $DTC_LINUX_PATH
@@ -60,4 +69,13 @@ sed -i -- 's/#include <libfdt_env.h>/#include "libfdt_env.h"/g' ./libfdt/libfdt.
 sed -i -- 's/#include <fdt.h>/#include "fdt.h"/g' ./libfdt/libfdt.h
 git add ./libfdt/libfdt.h
 
-git commit -e -v -m "scripts/dtc: Update to upstream version [CHANGEME]"
+commit_msg=$(cat << EOF
+scripts/dtc: Update to upstream version ${dtc_version}
+
+This adds the following commits from upstream:
+
+${dtc_log}
+EOF
+)
+
+git commit -e -v -s -m "${commit_msg}"

scripts/dtc/util.c

@@ -396,7 +396,7 @@ void utilfdt_print_data(const char *data, int len)
 		} while (s < data + len);
 
 	} else if ((len % 4) == 0) {
-		const uint32_t *cell = (const uint32_t *)data;
+		const fdt32_t *cell = (const fdt32_t *)data;
 
 		printf(" = <");
 		for (i = 0, len /= 4; i < len; i++)
@@ -412,14 +412,15 @@ void utilfdt_print_data(const char *data, int len)
 	}
 }
 
-void util_version(void)
+void NORETURN util_version(void)
 {
 	printf("Version: %s\n", DTC_VERSION);
 	exit(0);
 }
 
-void util_usage(const char *errmsg, const char *synopsis,
-		const char *short_opts, struct option const long_opts[],
+void NORETURN util_usage(const char *errmsg, const char *synopsis,
+			 const char *short_opts,
+			 struct option const long_opts[],
 			 const char * const opts_help[])
 {
 	FILE *fp = errmsg ? stderr : stdout;

scripts/dtc/util.h

@@ -25,9 +25,17 @@
  *                                                                   USA
  */
 
+#ifdef __GNUC__
+#define PRINTF(i, j)	__attribute__((format (printf, i, j)))
+#define NORETURN	__attribute__((noreturn))
+#else
+#define PRINTF(i, j)
+#define NORETURN
+#endif
+
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 
-static inline void __attribute__((noreturn)) die(const char *str, ...)
+static inline void NORETURN PRINTF(1, 2) die(const char *str, ...)
 {
 	va_list ap;
 
@@ -53,13 +61,14 @@ static inline void *xrealloc(void *p, size_t len)
 	void *new = realloc(p, len);
 
 	if (!new)
-		die("realloc() failed (len=%d)\n", len);
+		die("realloc() failed (len=%zd)\n", len);
 
 	return new;
 }
 
 extern char *xstrdup(const char *s);
-extern int xasprintf(char **strp, const char *fmt, ...);
+
+extern int PRINTF(2, 3) xasprintf(char **strp, const char *fmt, ...);
 extern char *join_path(const char *path, const char *name);
 
 /**
@@ -188,7 +197,7 @@ void utilfdt_print_data(const char *data, int len);
 /**
  * Show source version and exit
  */
-void util_version(void) __attribute__((noreturn));
+void NORETURN util_version(void);
 
 /**
  * Show usage and exit
@@ -202,9 +211,10 @@ void util_version(void) __attribute__((noreturn));
  * @param long_opts	The structure of long options
  * @param opts_help	An array of help strings (should align with long_opts)
  */
-void util_usage(const char *errmsg, const char *synopsis,
-		const char *short_opts, struct option const long_opts[],
-		const char * const opts_help[]) __attribute__((noreturn));
+void NORETURN util_usage(const char *errmsg, const char *synopsis,
+			 const char *short_opts,
+			 struct option const long_opts[],
+			 const char * const opts_help[]);
 
 /**
  * Show usage and exit

scripts/dtc/version_gen.h

-#define DTC_VERSION "DTC 1.4.2-g0931cea3"
+#define DTC_VERSION "DTC 1.4.4-g756ffc4f"