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

@@ -1,7 +1,7 @@
 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

@@ -0,0 +1,36 @@
+* 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/faraday,ftmac.txt

@@ -1,8 +1,11 @@
-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;
 
@@ -469,11 +471,11 @@ 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,
-				     struct device_node *dad,
-				     struct device_node **mynodes,
-				     void *(*dt_alloc)(u64 size, u64 align),
-				     bool detached)
+void *__unflatten_device_tree(const void *blob,
+			      struct device_node *dad,
+			      struct device_node **mynodes,
+			      void *(*dt_alloc)(u64 size, u64 align),
+			      bool detached)
 {
 	int size;
 	void *mem;
@@ -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

@@ -1,7 +1,18 @@
 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 := -@