These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

14 files changed, 487 insertions, 83 deletions

diff --git a/kernel/drivers/of/Kconfig b/kernel/drivers/of/Kconfig
index 07bb3c8f1..e2a48415d 100644
--- a/kernel/drivers/of/Kconfig
+++ b/kernel/drivers/of/Kconfig
@@ -1,15 +1,20 @@
 config DTC
 	bool
 
-config OF
-	bool
+menuconfig OF
+	bool "Device Tree and Open Firmware support"
+	help
+	  This option enables the device tree infrastructure.
+	  It is automatically selected by platforms that need it or can
+	  be enabled manually for unittests, overlays or
+	  compile-coverage.
 
-menu "Device Tree and Open Firmware support"
-	depends on OF
+if OF
 
 config OF_UNITTEST
 	bool "Device Tree runtime unit tests"
-	depends on OF_IRQ && OF_EARLY_FLATTREE
+	depends on OF_IRQ
+	select OF_EARLY_FLATTREE
 	select OF_RESOLVE
 	help
 	  This option builds in test cases for the device tree infrastructure
@@ -18,6 +23,16 @@ config OF_UNITTEST
 
 	  If unsure, say N here, but this option is safe to enable.
 
+config OF_ALL_DTBS
+	bool "Build all Device Tree Blobs"
+	depends on COMPILE_TEST
+	select DTC
+	help
+	  This option builds all possible Device Tree Blobs (DTBs) for the
+	  current architecture.
+
+	  If unsure, say N here, but this option is safe to enable.
+
 config OF_FLATTREE
 	bool
 	select DTC
@@ -42,7 +57,7 @@ config OF_DYNAMIC
 
 config OF_ADDRESS
 	def_bool y
-	depends on !SPARC
+	depends on !SPARC && HAS_IOMEM
 	select OF_ADDRESS_PCI if PCI
 
 config OF_ADDRESS_PCI
@@ -97,4 +112,4 @@ config OF_OVERLAY
 	  While this option is selected automatically when needed, you can
 	  enable it manually to improve device tree unit test coverage.
 
-endmenu # OF
+endif # OF
diff --git a/kernel/drivers/of/Makefile b/kernel/drivers/of/Makefile
index fcacb186a..156c072b3 100644
--- a/kernel/drivers/of/Makefile
+++ b/kernel/drivers/of/Makefile
@@ -16,6 +16,3 @@ obj-$(CONFIG_OF_RESOLVE)  += resolver.o
 obj-$(CONFIG_OF_OVERLAY) += overlay.o
 
 obj-$(CONFIG_OF_UNITTEST) += unittest-data/
-
-CFLAGS_fdt.o = -I$(src)/../../scripts/dtc/libfdt
-CFLAGS_fdt_address.o = -I$(src)/../../scripts/dtc/libfdt
diff --git a/kernel/drivers/of/address.c b/kernel/drivers/of/address.c
index 384574c39..9582c5703 100644
--- a/kernel/drivers/of/address.c
+++ b/kernel/drivers/of/address.c
@@ -330,6 +330,12 @@ int of_pci_range_to_resource(struct of_pci_range *range,
 		}
 		res->start = port;
 	} else {
+		if ((sizeof(resource_size_t) < 8) &&
+		    upper_32_bits(range->cpu_addr)) {
+			err = -EINVAL;
+			goto invalid_range;
+		}
+
 		res->start = range->cpu_addr;
 	}
 	res->end = res->start + range->size - 1;
@@ -479,9 +485,10 @@ static int of_translate_one(struct device_node *parent, struct of_bus *bus,
 	int rone;
 	u64 offset = OF_BAD_ADDR;
 
-	/* Normally, an absence of a "ranges" property means we are
+	/*
+	 * Normally, an absence of a "ranges" property means we are
 	 * crossing a non-translatable boundary, and thus the addresses
-	 * below the current not cannot be converted to CPU physical ones.
+	 * below the current cannot be converted to CPU physical ones.
 	 * Unfortunately, while this is very clear in the spec, it's not
 	 * what Apple understood, and they do have things like /uni-n or
 	 * /ht nodes with no "ranges" property and a lot of perfectly
diff --git a/kernel/drivers/of/base.c b/kernel/drivers/of/base.c
index 5ed97246c..017dd94f1 100644
--- a/kernel/drivers/of/base.c
+++ b/kernel/drivers/of/base.c
@@ -375,10 +375,7 @@ bool __weak arch_find_n_match_cpu_physical_id(struct device_node *cpun,
 					   cpu, thread))
 		return true;
 
-	if (__of_find_n_match_cpu_property(cpun, "reg", cpu, thread))
-		return true;
-
-	return false;
+	return __of_find_n_match_cpu_property(cpun, "reg", cpu, thread);
 }
 
 /**
@@ -2231,6 +2228,40 @@ struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
 EXPORT_SYMBOL(of_graph_get_next_endpoint);
 
 /**
+ * of_graph_get_endpoint_by_regs() - get endpoint node of specific identifiers
+ * @parent: pointer to the parent device node
+ * @port_reg: identifier (value of reg property) of the parent port node
+ * @reg: identifier (value of reg property) of the endpoint node
+ *
+ * Return: An 'endpoint' node pointer which is identified by reg and at the same
+ * is the child of a port node identified by port_reg. reg and port_reg are
+ * ignored when they are -1.
+ */
+struct device_node *of_graph_get_endpoint_by_regs(
+	const struct device_node *parent, int port_reg, int reg)
+{
+	struct of_endpoint endpoint;
+	struct device_node *node, *prev_node = NULL;
+
+	while (1) {
+		node = of_graph_get_next_endpoint(parent, prev_node);
+		of_node_put(prev_node);
+		if (!node)
+			break;
+
+		of_graph_parse_endpoint(node, &endpoint);
+		if (((port_reg == -1) || (endpoint.port == port_reg)) &&
+			((reg == -1) || (endpoint.id == reg)))
+			return node;
+
+		prev_node = node;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL(of_graph_get_endpoint_by_regs);
+
+/**
  * of_graph_get_remote_port_parent() - get remote port's parent node
  * @node: pointer to a local endpoint device_node
  *
diff --git a/kernel/drivers/of/device.c b/kernel/drivers/of/device.c
index 20c1332a0..e5f47cec7 100644
--- a/kernel/drivers/of/device.c
+++ b/kernel/drivers/of/device.c
@@ -60,11 +60,12 @@ int of_device_add(struct platform_device *ofdev)
 	ofdev->name = dev_name(&ofdev->dev);
 	ofdev->id = -1;
 
-	/* device_add will assume that this device is on the same node as
-	 * the parent. If there is no parent defined, set the node
-	 * explicitly */
-	if (!ofdev->dev.parent)
-		set_dev_node(&ofdev->dev, of_node_to_nid(ofdev->dev.of_node));
+	/*
+	 * If this device has not binding numa node in devicetree, that is
+	 * of_node_to_nid returns NUMA_NO_NODE. device_add will assume that this
+	 * device is on the same node as the parent.
+	 */
+	set_dev_node(&ofdev->dev, of_node_to_nid(ofdev->dev.of_node));
 
 	return device_add(&ofdev->dev);
 }
@@ -163,6 +164,18 @@ void of_device_unregister(struct platform_device *ofdev)
 }
 EXPORT_SYMBOL(of_device_unregister);
 
+const void *of_device_get_match_data(const struct device *dev)
+{
+	const struct of_device_id *match;
+
+	match = of_match_device(dev->driver->of_match_table, dev);
+	if (!match)
+		return NULL;
+
+	return match->data;
+}
+EXPORT_SYMBOL(of_device_get_match_data);
+
 ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
 {
 	const char *compat;
diff --git a/kernel/drivers/of/fdt.c b/kernel/drivers/of/fdt.c
index d91f721a0..655f79db7 100644
--- a/kernel/drivers/of/fdt.c
+++ b/kernel/drivers/of/fdt.c
@@ -13,6 +13,7 @@
 #include <linux/kernel.h>
 #include <linux/initrd.h>
 #include <linux/memblock.h>
+#include <linux/mutex.h>
 #include <linux/of.h>
 #include <linux/of_fdt.h>
 #include <linux/of_reserved_mem.h>
@@ -164,11 +165,14 @@ static void *unflatten_dt_alloc(void **mem, unsigned long size,
  * unflatten_dt_node - Alloc and populate a device_node from the flat tree
  * @blob: The parent device tree blob
  * @mem: Memory chunk to use for allocating device nodes and properties
- * @p: pointer to node in flat tree
+ * @poffset: pointer to node in flat tree
  * @dad: Parent struct device_node
+ * @nodepp: The device_node tree created by the call
  * @fpsize: Size of the node path up at the current depth.
+ * @dryrun: If true, do not allocate device nodes but still calculate needed
+ * memory size
  */
-static void * unflatten_dt_node(void *blob,
+static void * unflatten_dt_node(const void *blob,
 				void *mem,
 				int *poffset,
 				struct device_node *dad,
@@ -181,7 +185,7 @@ static void * unflatten_dt_node(void *blob,
 	struct property *pp, **prev_pp = NULL;
 	const char *pathp;
 	unsigned int l, allocl;
-	static int depth = 0;
+	static int depth;
 	int old_depth;
 	int offset;
 	int has_name = 0;
@@ -378,7 +382,7 @@ static void * unflatten_dt_node(void *blob,
  * @dt_alloc: An allocator that provides a virtual address to memory
  * for the resulting tree
  */
-static void __unflatten_device_tree(void *blob,
+static void __unflatten_device_tree(const void *blob,
 			     struct device_node **mynodes,
 			     void * (*dt_alloc)(u64 size, u64 align))
 {
@@ -433,6 +437,8 @@ static void *kernel_tree_alloc(u64 size, u64 align)
 	return kzalloc(size, GFP_KERNEL);
 }
 
+static DEFINE_MUTEX(of_fdt_unflatten_mutex);
+
 /**
  * of_fdt_unflatten_tree - create tree of device_nodes from flat blob
  *
@@ -441,10 +447,12 @@ static void *kernel_tree_alloc(u64 size, u64 align)
  * pointers of the nodes so the normal device-tree walking functions
  * can be used.
  */
-void of_fdt_unflatten_tree(unsigned long *blob,
+void of_fdt_unflatten_tree(const unsigned long *blob,
 			struct device_node **mynodes)
 {
+	mutex_lock(&of_fdt_unflatten_mutex);
 	__unflatten_device_tree(blob, mynodes, &kernel_tree_alloc);
+	mutex_unlock(&of_fdt_unflatten_mutex);
 }
 EXPORT_SYMBOL_GPL(of_fdt_unflatten_tree);
 
@@ -580,11 +588,6 @@ void __init early_init_fdt_scan_reserved_mem(void)
 	if (!initial_boot_params)
 		return;
 
-	/* Reserve the dtb region */
-	early_init_dt_reserve_memory_arch(__pa(initial_boot_params),
-					  fdt_totalsize(initial_boot_params),
-					  0);
-
 	/* Process header /memreserve/ fields */
 	for (n = 0; ; n++) {
 		fdt_get_mem_rsv(initial_boot_params, n, &base, &size);
@@ -598,6 +601,20 @@ void __init early_init_fdt_scan_reserved_mem(void)
 }
 
 /**
+ * early_init_fdt_reserve_self() - reserve the memory used by the FDT blob
+ */
+void __init early_init_fdt_reserve_self(void)
+{
+	if (!initial_boot_params)
+		return;
+
+	/* Reserve the dtb region */
+	early_init_dt_reserve_memory_arch(__pa(initial_boot_params),
+					  fdt_totalsize(initial_boot_params),
+					  0);
+}
+
+/**
  * of_scan_flat_dt - scan flattened tree blob and call callback on each.
  * @it: callback function
  * @data: context data pointer
@@ -801,20 +818,24 @@ static int __init early_init_dt_scan_chosen_serial(void)
 	if (!p || !l)
 		return -ENOENT;
 
+	/* Remove console options if present */
+	l = strchrnul(p, ':') - p;
+
 	/* Get the node specified by stdout-path */
-	offset = fdt_path_offset(fdt, p);
+	offset = fdt_path_offset_namelen(fdt, p, l);
 	if (offset < 0)
 		return -ENODEV;
 
 	while (match->compatible[0]) {
-		unsigned long addr;
+		u64 addr;
+
 		if (fdt_node_check_compatible(fdt, offset, match->compatible)) {
 			match++;
 			continue;
 		}
 
 		addr = fdt_translate_address(fdt, offset);
-		if (!addr)
+		if (addr == OF_BAD_ADDR)
 			return -ENXIO;
 
 		of_setup_earlycon(addr, match->data);
@@ -1017,13 +1038,24 @@ void * __init __weak early_init_dt_alloc_memory_arch(u64 size, u64 align)
 	return __va(memblock_alloc(size, align));
 }
 #else
+void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
+{
+	WARN_ON(1);
+}
+
 int __init __weak early_init_dt_reserve_memory_arch(phys_addr_t base,
 					phys_addr_t size, bool nomap)
 {
-	pr_err("Reserved memory not supported, ignoring range 0x%pa - 0x%pa%s\n",
+	pr_err("Reserved memory not supported, ignoring range %pa - %pa%s\n",
 		  &base, &size, nomap ? " (nomap)" : "");
 	return -ENOSYS;
 }
+
+void * __init __weak early_init_dt_alloc_memory_arch(u64 size, u64 align)
+{
+	WARN_ON(1);
+	return NULL;
+}
 #endif
 
 bool __init early_init_dt_verify(void *params)
diff --git a/kernel/drivers/of/irq.c b/kernel/drivers/of/irq.c
index 1a7980692..72a2c1969 100644
--- a/kernel/drivers/of/irq.c
+++ b/kernel/drivers/of/irq.c
@@ -18,6 +18,7 @@
  * driver.
  */
 
+#include <linux/device.h>
 #include <linux/errno.h>
 #include <linux/list.h>
 #include <linux/module.h>
@@ -76,6 +77,7 @@ struct device_node *of_irq_find_parent(struct device_node *child)
 
 	return p;
 }
+EXPORT_SYMBOL_GPL(of_irq_find_parent);
 
 /**
  * of_irq_parse_raw - Low level interrupt tree parsing
@@ -252,8 +254,6 @@ int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq)
 		 * Successfully parsed an interrrupt-map translation; copy new
 		 * interrupt specifier into the out_irq structure
 		 */
-		out_irq->np = newpar;
-
 		match_array = imap - newaddrsize - newintsize;
 		for (i = 0; i < newintsize; i++)
 			out_irq->args[i] = be32_to_cpup(imap - newintsize + i);
@@ -262,6 +262,7 @@ int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq)
 
 	skiplevel:
 		/* Iterate again with new parent */
+		out_irq->np = newpar;
 		pr_debug(" -> new parent: %s\n", of_node_full_name(newpar));
 		of_node_put(ipar);
 		ipar = newpar;
@@ -432,6 +433,7 @@ int of_irq_get_byname(struct device_node *dev, const char *name)
 
 	return of_irq_get(dev, index);
 }
+EXPORT_SYMBOL_GPL(of_irq_get_byname);
 
 /**
  * of_irq_count - Count the number of IRQs a node uses
@@ -469,7 +471,7 @@ int of_irq_to_resource_table(struct device_node *dev, struct resource *res,
 }
 EXPORT_SYMBOL_GPL(of_irq_to_resource_table);
 
-struct intc_desc {
+struct of_intc_desc {
 	struct list_head	list;
 	struct device_node	*dev;
 	struct device_node	*interrupt_parent;
@@ -485,7 +487,7 @@ struct intc_desc {
 void __init of_irq_init(const struct of_device_id *matches)
 {
 	struct device_node *np, *parent = NULL;
-	struct intc_desc *desc, *temp_desc;
+	struct of_intc_desc *desc, *temp_desc;
 	struct list_head intc_desc_list, intc_parent_list;
 
 	INIT_LIST_HEAD(&intc_desc_list);
@@ -496,14 +498,16 @@ void __init of_irq_init(const struct of_device_id *matches)
 				!of_device_is_available(np))
 			continue;
 		/*
-		 * Here, we allocate and populate an intc_desc with the node
+		 * Here, we allocate and populate an of_intc_desc with the node
 		 * pointer, interrupt-parent device_node etc.
 		 */
 		desc = kzalloc(sizeof(*desc), GFP_KERNEL);
-		if (WARN_ON(!desc))
+		if (WARN_ON(!desc)) {
+			of_node_put(np);
 			goto err;
+		}
 
-		desc->dev = np;
+		desc->dev = of_node_get(np);
 		desc->interrupt_parent = of_irq_find_parent(np);
 		if (desc->interrupt_parent == np)
 			desc->interrupt_parent = NULL;
@@ -574,6 +578,199 @@ void __init of_irq_init(const struct of_device_id *matches)
 err:
 	list_for_each_entry_safe(desc, temp_desc, &intc_desc_list, list) {
 		list_del(&desc->list);
+		of_node_put(desc->dev);
 		kfree(desc);
 	}
 }
+
+static u32 __of_msi_map_rid(struct device *dev, struct device_node **np,
+			    u32 rid_in)
+{
+	struct device *parent_dev;
+	struct device_node *msi_controller_node;
+	struct device_node *msi_np = *np;
+	u32 map_mask, masked_rid, rid_base, msi_base, rid_len, phandle;
+	int msi_map_len;
+	bool matched;
+	u32 rid_out = rid_in;
+	const __be32 *msi_map = NULL;
+
+	/*
+	 * Walk up the device parent links looking for one with a
+	 * "msi-map" property.
+	 */
+	for (parent_dev = dev; parent_dev; parent_dev = parent_dev->parent) {
+		if (!parent_dev->of_node)
+			continue;
+
+		msi_map = of_get_property(parent_dev->of_node,
+					  "msi-map", &msi_map_len);
+		if (!msi_map)
+			continue;
+
+		if (msi_map_len % (4 * sizeof(__be32))) {
+			dev_err(parent_dev, "Error: Bad msi-map length: %d\n",
+				msi_map_len);
+			return rid_out;
+		}
+		/* We have a good parent_dev and msi_map, let's use them. */
+		break;
+	}
+	if (!msi_map)
+		return rid_out;
+
+	/* The default is to select all bits. */
+	map_mask = 0xffffffff;
+
+	/*
+	 * Can be overridden by "msi-map-mask" property.  If
+	 * of_property_read_u32() fails, the default is used.
+	 */
+	of_property_read_u32(parent_dev->of_node, "msi-map-mask", &map_mask);
+
+	masked_rid = map_mask & rid_in;
+	matched = false;
+	while (!matched && msi_map_len >= 4 * sizeof(__be32)) {
+		rid_base = be32_to_cpup(msi_map + 0);
+		phandle = be32_to_cpup(msi_map + 1);
+		msi_base = be32_to_cpup(msi_map + 2);
+		rid_len = be32_to_cpup(msi_map + 3);
+
+		if (rid_base & ~map_mask) {
+			dev_err(parent_dev,
+				"Invalid msi-map translation - msi-map-mask (0x%x) ignores rid-base (0x%x)\n",
+				map_mask, rid_base);
+			return rid_out;
+		}
+
+		msi_controller_node = of_find_node_by_phandle(phandle);
+
+		matched = (masked_rid >= rid_base &&
+			   masked_rid < rid_base + rid_len);
+		if (msi_np)
+			matched &= msi_np == msi_controller_node;
+
+		if (matched && !msi_np) {
+			*np = msi_np = msi_controller_node;
+			break;
+		}
+
+		of_node_put(msi_controller_node);
+		msi_map_len -= 4 * sizeof(__be32);
+		msi_map += 4;
+	}
+	if (!matched)
+		return rid_out;
+
+	rid_out = masked_rid - rid_base + msi_base;
+	dev_dbg(dev,
+		"msi-map at: %s, using mask %08x, rid-base: %08x, msi-base: %08x, length: %08x, rid: %08x -> %08x\n",
+		dev_name(parent_dev), map_mask, rid_base, msi_base,
+		rid_len, rid_in, rid_out);
+
+	return rid_out;
+}
+
+/**
+ * of_msi_map_rid - Map a MSI requester ID for a device.
+ * @dev: device for which the mapping is to be done.
+ * @msi_np: device node of the expected msi controller.
+ * @rid_in: unmapped MSI requester ID for the device.
+ *
+ * Walk up the device hierarchy looking for devices with a "msi-map"
+ * property.  If found, apply the mapping to @rid_in.
+ *
+ * Returns the mapped MSI requester ID.
+ */
+u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in)
+{
+	return __of_msi_map_rid(dev, &msi_np, rid_in);
+}
+
+static struct irq_domain *__of_get_msi_domain(struct device_node *np,
+					      enum irq_domain_bus_token token)
+{
+	struct irq_domain *d;
+
+	d = irq_find_matching_host(np, token);
+	if (!d)
+		d = irq_find_host(np);
+
+	return d;
+}
+
+/**
+ * of_msi_map_get_device_domain - Use msi-map to find the relevant MSI domain
+ * @dev: device for which the mapping is to be done.
+ * @rid: Requester ID for the device.
+ *
+ * Walk up the device hierarchy looking for devices with a "msi-map"
+ * property.
+ *
+ * Returns: the MSI domain for this device (or NULL on failure)
+ */
+struct irq_domain *of_msi_map_get_device_domain(struct device *dev, u32 rid)
+{
+	struct device_node *np = NULL;
+
+	__of_msi_map_rid(dev, &np, rid);
+	return __of_get_msi_domain(np, DOMAIN_BUS_PCI_MSI);
+}
+
+/**
+ * of_msi_get_domain - Use msi-parent to find the relevant MSI domain
+ * @dev: device for which the domain is requested
+ * @np: device node for @dev
+ * @token: bus type for this domain
+ *
+ * Parse the msi-parent property (both the simple and the complex
+ * versions), and returns the corresponding MSI domain.
+ *
+ * Returns: the MSI domain for this device (or NULL on failure).
+ */
+struct irq_domain *of_msi_get_domain(struct device *dev,
+				     struct device_node *np,
+				     enum irq_domain_bus_token token)
+{
+	struct device_node *msi_np;
+	struct irq_domain *d;
+
+	/* Check for a single msi-parent property */
+	msi_np = of_parse_phandle(np, "msi-parent", 0);
+	if (msi_np && !of_property_read_bool(msi_np, "#msi-cells")) {
+		d = __of_get_msi_domain(msi_np, token);
+		if (!d)
+			of_node_put(msi_np);
+		return d;
+	}
+
+	if (token == DOMAIN_BUS_PLATFORM_MSI) {
+		/* Check for the complex msi-parent version */
+		struct of_phandle_args args;
+		int index = 0;
+
+		while (!of_parse_phandle_with_args(np, "msi-parent",
+						   "#msi-cells",
+						   index, &args)) {
+			d = __of_get_msi_domain(args.np, token);
+			if (d)
+				return d;
+
+			of_node_put(args.np);
+			index++;
+		}
+	}
+
+	return NULL;
+}
+
+/**
+ * of_msi_configure - Set the msi_domain field of a device
+ * @dev: device structure to associate with an MSI irq domain
+ * @np: device node for that device
+ */
+void of_msi_configure(struct device *dev, struct device_node *np)
+{
+	dev_set_msi_domain(dev,
+			   of_msi_get_domain(dev, np, DOMAIN_BUS_PLATFORM_MSI));
+}
diff --git a/kernel/drivers/of/of_mdio.c b/kernel/drivers/of/of_mdio.c
index bec8ec2b3..a87a868fe 100644
--- a/kernel/drivers/of/of_mdio.c
+++ b/kernel/drivers/of/of_mdio.c
@@ -16,6 +16,7 @@
 #include <linux/phy.h>
 #include <linux/phy_fixed.h>
 #include <linux/of.h>
+#include <linux/of_gpio.h>
 #include <linux/of_irq.h>
 #include <linux/of_mdio.h>
 #include <linux/module.h>
@@ -68,6 +69,9 @@ static int of_mdiobus_register_phy(struct mii_bus *mdio, struct device_node *chi
 			phy->irq = mdio->irq[addr];
 	}
 
+	if (of_property_read_bool(child, "broken-turn-around"))
+		mdio->phy_ignore_ta_mask |= 1 << addr;
+
 	/* Associate the OF node with the device structure so it
 	 * can be looked up later */
 	of_node_get(child);
@@ -193,7 +197,8 @@ static int of_phy_match(struct device *dev, void *phy_np)
  * of_phy_find_device - Give a PHY node, find the phy_device
  * @phy_np: Pointer to the phy's device tree node
  *
- * Returns a pointer to the phy_device.
+ * If successful, returns a pointer to the phy_device with the embedded
+ * struct device refcount incremented by one, or NULL on failure.
  */
 struct phy_device *of_phy_find_device(struct device_node *phy_np)
 {
@@ -213,7 +218,9 @@ EXPORT_SYMBOL(of_phy_find_device);
  * @hndlr: Link state callback for the network device
  * @iface: PHY data interface type
  *
- * Returns a pointer to the phy_device if successful.  NULL otherwise
+ * If successful, returns a pointer to the phy_device with the embedded
+ * struct device refcount incremented by one, or NULL on failure. The
+ * refcount must be dropped by calling phy_disconnect() or phy_detach().
  */
 struct phy_device *of_phy_connect(struct net_device *dev,
 				  struct device_node *phy_np,
@@ -221,13 +228,19 @@ struct phy_device *of_phy_connect(struct net_device *dev,
 				  phy_interface_t iface)
 {
 	struct phy_device *phy = of_phy_find_device(phy_np);
+	int ret;
 
 	if (!phy)
 		return NULL;
 
 	phy->dev_flags = flags;
 
-	return phy_connect_direct(dev, phy, hndlr, iface) ? NULL : phy;
+	ret = phy_connect_direct(dev, phy, hndlr, iface);
+
+	/* refcount is held by phy_connect_direct() on success */
+	put_device(&phy->dev);
+
+	return ret ? NULL : phy;
 }
 EXPORT_SYMBOL(of_phy_connect);
 
@@ -237,17 +250,27 @@ EXPORT_SYMBOL(of_phy_connect);
  * @phy_np: Node pointer for the PHY
  * @flags: flags to pass to the PHY
  * @iface: PHY data interface type
+ *
+ * If successful, returns a pointer to the phy_device with the embedded
+ * struct device refcount incremented by one, or NULL on failure. The
+ * refcount must be dropped by calling phy_disconnect() or phy_detach().
  */
 struct phy_device *of_phy_attach(struct net_device *dev,
 				 struct device_node *phy_np, u32 flags,
 				 phy_interface_t iface)
 {
 	struct phy_device *phy = of_phy_find_device(phy_np);
+	int ret;
 
 	if (!phy)
 		return NULL;
 
-	return phy_attach_direct(dev, phy, flags, iface) ? NULL : phy;
+	ret = phy_attach_direct(dev, phy, flags, iface);
+
+	/* refcount is held by phy_attach_direct() on success */
+	put_device(&phy->dev);
+
+	return ret ? NULL : phy;
 }
 EXPORT_SYMBOL(of_phy_attach);
 
@@ -291,6 +314,7 @@ int of_phy_register_fixed_link(struct device_node *np)
 	struct fixed_phy_status status = {};
 	struct device_node *fixed_link_node;
 	const __be32 *fixed_link_prop;
+	int link_gpio;
 	int len, err;
 	struct phy_device *phy;
 	const char *managed;
@@ -299,7 +323,7 @@ int of_phy_register_fixed_link(struct device_node *np)
 	if (err == 0) {
 		if (strcmp(managed, "in-band-status") == 0) {
 			/* status is zeroed, namely its .link member */
-			phy = fixed_phy_register(PHY_POLL, &status, np);
+			phy = fixed_phy_register(PHY_POLL, &status, -1, np);
 			return IS_ERR(phy) ? PTR_ERR(phy) : 0;
 		}
 	}
@@ -315,8 +339,13 @@ int of_phy_register_fixed_link(struct device_node *np)
 		status.pause = of_property_read_bool(fixed_link_node, "pause");
 		status.asym_pause = of_property_read_bool(fixed_link_node,
 							  "asym-pause");
+		link_gpio = of_get_named_gpio_flags(fixed_link_node,
+						    "link-gpios", 0, NULL);
 		of_node_put(fixed_link_node);
-		phy = fixed_phy_register(PHY_POLL, &status, np);
+		if (link_gpio == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+
+		phy = fixed_phy_register(PHY_POLL, &status, link_gpio, np);
 		return IS_ERR(phy) ? PTR_ERR(phy) : 0;
 	}
 
@@ -328,7 +357,7 @@ int of_phy_register_fixed_link(struct device_node *np)
 		status.speed = be32_to_cpu(fixed_link_prop[2]);
 		status.pause = be32_to_cpu(fixed_link_prop[3]);
 		status.asym_pause = be32_to_cpu(fixed_link_prop[4]);
-		phy = fixed_phy_register(PHY_POLL, &status, np);
+		phy = fixed_phy_register(PHY_POLL, &status, -1, np);
 		return IS_ERR(phy) ? PTR_ERR(phy) : 0;
 	}
 
diff --git a/kernel/drivers/of/of_pci.c b/kernel/drivers/of/of_pci.c
index 5751dc5b6..b1449f716 100644
--- a/kernel/drivers/of/of_pci.c
+++ b/kernel/drivers/of/of_pci.c
@@ -5,6 +5,7 @@
 #include <linux/of_device.h>
 #include <linux/of_pci.h>
 #include <linux/slab.h>
+#include <asm-generic/pci-bridge.h>
 
 static inline int __of_pci_pci_compare(struct device_node *node,
 				       unsigned int data)
@@ -118,24 +119,29 @@ int of_get_pci_domain_nr(struct device_node *node)
 EXPORT_SYMBOL_GPL(of_get_pci_domain_nr);
 
 /**
- * of_pci_dma_configure - Setup DMA configuration
- * @dev: ptr to pci_dev struct of the PCI device
- *
- * Function to update PCI devices's DMA configuration using the same
- * info from the OF node of host bridge's parent (if any).
+ * of_pci_check_probe_only - Setup probe only mode if linux,pci-probe-only
+ *                           is present and valid
  */
-void of_pci_dma_configure(struct pci_dev *pci_dev)
+void of_pci_check_probe_only(void)
 {
-	struct device *dev = &pci_dev->dev;
-	struct device *bridge = pci_get_host_bridge_device(pci_dev);
+	u32 val;
+	int ret;
 
-	if (!bridge->parent)
+	ret = of_property_read_u32(of_chosen, "linux,pci-probe-only", &val);
+	if (ret) {
+		if (ret == -ENODATA || ret == -EOVERFLOW)
+			pr_warn("linux,pci-probe-only without valid value, ignoring\n");
 		return;
+	}
+
+	if (val)
+		pci_add_flags(PCI_PROBE_ONLY);
+	else
+		pci_clear_flags(PCI_PROBE_ONLY);
 
-	of_dma_configure(dev, bridge->parent->of_node);
-	pci_put_host_bridge_device(bridge);
+	pr_info("PCI: PROBE_ONLY %sabled\n", val ? "en" : "dis");
 }
-EXPORT_SYMBOL_GPL(of_pci_dma_configure);
+EXPORT_SYMBOL_GPL(of_pci_check_probe_only);
 
 #if defined(CONFIG_OF_ADDRESS)
 /**
@@ -223,8 +229,10 @@ int of_pci_get_host_bridge_resources(struct device_node *dev,
 		}
 
 		err = of_pci_range_to_resource(&range, dev, res);
-		if (err)
-			goto conversion_failed;
+		if (err) {
+			kfree(res);
+			continue;
+		}
 
 		if (resource_type(res) == IORESOURCE_IO) {
 			if (!io_base) {
diff --git a/kernel/drivers/of/of_pci_irq.c b/kernel/drivers/of/of_pci_irq.c
index 1710d9dc7..2306313c0 100644
--- a/kernel/drivers/of/of_pci_irq.c
+++ b/kernel/drivers/of/of_pci_irq.c
@@ -38,8 +38,8 @@ int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq
 	 */
 	rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
 	if (rc != 0)
-		return rc;
-	/* No pin, exit */
+		goto err;
+	/* No pin, exit with no error message. */
 	if (pin == 0)
 		return -ENODEV;
 
@@ -53,8 +53,10 @@ int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq
 			ppnode = pci_bus_to_OF_node(pdev->bus);
 
 			/* No node for host bridge ? give up */
-			if (ppnode == NULL)
-				return -EINVAL;
+			if (ppnode == NULL) {
+				rc = -EINVAL;
+				goto err;
+			}
 		} else {
 			/* We found a P2P bridge, check if it has a node */
 			ppnode = pci_device_to_OF_node(ppdev);
@@ -86,7 +88,13 @@ int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq
 	out_irq->args[0] = pin;
 	laddr[0] = cpu_to_be32((pdev->bus->number << 16) | (pdev->devfn << 8));
 	laddr[1] = laddr[2] = cpu_to_be32(0);
-	return of_irq_parse_raw(laddr, out_irq);
+	rc = of_irq_parse_raw(laddr, out_irq);
+	if (rc)
+		goto err;
+	return 0;
+err:
+	dev_err(&pdev->dev, "of_irq_parse_pci() failed with rc=%d\n", rc);
+	return rc;
 }
 EXPORT_SYMBOL_GPL(of_irq_parse_pci);
 
@@ -105,10 +113,8 @@ int of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin)
 	int ret;
 
 	ret = of_irq_parse_pci(dev, &oirq);
-	if (ret) {
-		dev_err(&dev->dev, "of_irq_parse_pci() failed with rc=%d\n", ret);
+	if (ret)
 		return 0; /* Proper return code 0 == NO_IRQ */
-	}
 
 	return irq_create_of_mapping(&oirq);
 }
diff --git a/kernel/drivers/of/of_reserved_mem.c b/kernel/drivers/of/of_reserved_mem.c
index 726ebe792..1a3556a9e 100644
--- a/kernel/drivers/of/of_reserved_mem.c
+++ b/kernel/drivers/of/of_reserved_mem.c
@@ -1,7 +1,7 @@
 /*
  * Device tree based initialization code for reserved memory.
  *
- * Copyright (c) 2013, The Linux Foundation. All Rights Reserved.
+ * Copyright (c) 2013, 2015 The Linux Foundation. All Rights Reserved.
  * Copyright (c) 2013,2014 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  * Author: Marek Szyprowski <m.szyprowski@samsung.com>
@@ -20,6 +20,7 @@
 #include <linux/mm.h>
 #include <linux/sizes.h>
 #include <linux/of_reserved_mem.h>
+#include <linux/sort.h>
 
 #define MAX_RESERVED_REGIONS	16
 static struct reserved_mem reserved_mem[MAX_RESERVED_REGIONS];
@@ -123,6 +124,10 @@ static int __init __reserved_mem_alloc_size(unsigned long node,
 		align = dt_mem_next_cell(dt_root_addr_cells, &prop);
 	}
 
+	/* Need adjust the alignment to satisfy the CMA requirement */
+	if (IS_ENABLED(CONFIG_CMA) && of_flat_dt_is_compatible(node, "shared-dma-pool"))
+		align = max(align, (phys_addr_t)PAGE_SIZE << max(MAX_ORDER - 1, pageblock_order));
+
 	prop = of_get_flat_dt_prop(node, "alloc-ranges", &len);
 	if (prop) {
 
@@ -197,12 +202,57 @@ static int __init __reserved_mem_init_node(struct reserved_mem *rmem)
 	return -ENOENT;
 }
 
+static int __init __rmem_cmp(const void *a, const void *b)
+{
+	const struct reserved_mem *ra = a, *rb = b;
+
+	if (ra->base < rb->base)
+		return -1;
+
+	if (ra->base > rb->base)
+		return 1;
+
+	return 0;
+}
+
+static void __init __rmem_check_for_overlap(void)
+{
+	int i;
+
+	if (reserved_mem_count < 2)
+		return;
+
+	sort(reserved_mem, reserved_mem_count, sizeof(reserved_mem[0]),
+	     __rmem_cmp, NULL);
+	for (i = 0; i < reserved_mem_count - 1; i++) {
+		struct reserved_mem *this, *next;
+
+		this = &reserved_mem[i];
+		next = &reserved_mem[i + 1];
+		if (!(this->base && next->base))
+			continue;
+		if (this->base + this->size > next->base) {
+			phys_addr_t this_end, next_end;
+
+			this_end = this->base + this->size;
+			next_end = next->base + next->size;
+			pr_err("Reserved memory: OVERLAP DETECTED!\n%s (%pa--%pa) overlaps with %s (%pa--%pa)\n",
+			       this->name, &this->base, &this_end,
+			       next->name, &next->base, &next_end);
+		}
+	}
+}
+
 /**
  * fdt_init_reserved_mem - allocate and init all saved reserved memory regions
  */
 void __init fdt_init_reserved_mem(void)
 {
 	int i;
+
+	/* check for overlapping reserved regions */
+	__rmem_check_for_overlap();
+
 	for (i = 0; i < reserved_mem_count; i++) {
 		struct reserved_mem *rmem = &reserved_mem[i];
 		unsigned long node = rmem->fdt_node;
diff --git a/kernel/drivers/of/overlay.c b/kernel/drivers/of/overlay.c
index dee9270ba..54e5af9d7 100644
--- a/kernel/drivers/of/overlay.c
+++ b/kernel/drivers/of/overlay.c
@@ -149,6 +149,7 @@ static int of_overlay_apply_one(struct of_overlay *ov,
 			pr_err("%s: Failed to apply single node @%s/%s\n",
 					__func__, target->full_name,
 					child->name);
+			of_node_put(child);
 			return ret;
 		}
 	}
@@ -333,7 +334,7 @@ static DEFINE_IDR(ov_idr);
  * of the overlay in a list. This list can be used to prevent
  * illegal overlay removals.
  *
- * Returns the id of the created overlay, or an negative error number
+ * Returns the id of the created overlay, or a negative error number
  */
 int of_overlay_create(struct device_node *tree)
 {
@@ -417,8 +418,10 @@ static int overlay_subtree_check(struct device_node *tree,
 		return 1;
 
 	for_each_child_of_node(tree, child) {
-		if (overlay_subtree_check(child, dn))
+		if (overlay_subtree_check(child, dn)) {
+			of_node_put(child);
 			return 1;
+		}
 	}
 
 	return 0;
@@ -481,7 +484,7 @@ static int overlay_removal_is_ok(struct of_overlay *ov)
  *
  * Removes an overlay if it is permissible.
  *
- * Returns 0 on success, or an negative error number
+ * Returns 0 on success, or a negative error number
  */
 int of_overlay_destroy(int id)
 {
@@ -528,7 +531,7 @@ EXPORT_SYMBOL_GPL(of_overlay_destroy);
  *
  * Removes all overlays from the system in the correct order.
  *
- * Returns 0 on success, or an negative error number
+ * Returns 0 on success, or a negative error number
  */
 int of_overlay_destroy_all(void)
 {
diff --git a/kernel/drivers/of/platform.c b/kernel/drivers/of/platform.c
index a01f57c9e..af9834361 100644
--- a/kernel/drivers/of/platform.c
+++ b/kernel/drivers/of/platform.c
@@ -25,6 +25,7 @@
 
 const struct of_device_id of_default_bus_match_table[] = {
 	{ .compatible = "simple-bus", },
+	{ .compatible = "simple-mfd", },
 #ifdef CONFIG_ARM_AMBA
 	{ .compatible = "arm,amba-bus", },
 #endif /* CONFIG_ARM_AMBA */
@@ -183,6 +184,7 @@ static struct platform_device *of_platform_device_create_pdata(
 	dev->dev.bus = &platform_bus_type;
 	dev->dev.platform_data = platform_data;
 	of_dma_configure(&dev->dev, dev->dev.of_node);
+	of_msi_configure(&dev->dev, dev->dev.of_node);
 
 	if (of_device_add(dev) != 0) {
 		of_dma_deconfigure(&dev->dev);
@@ -403,8 +405,10 @@ int of_platform_bus_probe(struct device_node *root,
 		if (!of_match_node(matches, child))
 			continue;
 		rc = of_platform_bus_create(child, matches, NULL, parent, false);
-		if (rc)
+		if (rc) {
+			of_node_put(child);
 			break;
+		}
 	}
 
 	of_node_put(root);
@@ -445,8 +449,10 @@ int of_platform_populate(struct device_node *root,
 
 	for_each_child_of_node(root, child) {
 		rc = of_platform_bus_create(child, matches, lookup, parent, true);
-		if (rc)
+		if (rc) {
+			of_node_put(child);
 			break;
+		}
 	}
 	of_node_set_flag(root, OF_POPULATED_BUS);
 
@@ -455,6 +461,15 @@ int of_platform_populate(struct device_node *root,
 }
 EXPORT_SYMBOL_GPL(of_platform_populate);
 
+int of_platform_default_populate(struct device_node *root,
+				 const struct of_dev_auxdata *lookup,
+				 struct device *parent)
+{
+	return of_platform_populate(root, of_default_bus_match_table, lookup,
+				    parent);
+}
+EXPORT_SYMBOL_GPL(of_platform_default_populate);
+
 static int of_platform_device_destroy(struct device *dev, void *data)
 {
 	/* Do not touch devices not populated from the device tree */
diff --git a/kernel/drivers/of/unittest.c b/kernel/drivers/of/unittest.c
index 18016341d..e16ea5717 100644
--- a/kernel/drivers/of/unittest.c
+++ b/kernel/drivers/of/unittest.c
@@ -205,16 +205,20 @@ static int __init of_unittest_check_node_linkage(struct device_node *np)
 		if (child->parent != np) {
 			pr_err("Child node %s links to wrong parent %s\n",
 				 child->name, np->name);
-			return -EINVAL;
+			rc = -EINVAL;
+			goto put_child;
 		}
 
 		rc = of_unittest_check_node_linkage(child);
 		if (rc < 0)
-			return rc;
+			goto put_child;
 		count += rc;
 	}
 
 	return count + 1;
+put_child:
+	of_node_put(child);
+	return rc;
 }
 
 static void __init of_unittest_check_tree_linkage(void)
@@ -979,7 +983,6 @@ static struct platform_driver unittest_driver = {
 	.remove			= unittest_remove,
 	.driver = {
 		.name		= "unittest",
-		.owner		= THIS_MODULE,
 		.of_match_table	= of_match_ptr(unittest_match),
 	},
 };
@@ -1666,7 +1669,6 @@ static const struct i2c_device_id unittest_i2c_dev_id[] = {
 static struct i2c_driver unittest_i2c_dev_driver = {
 	.driver = {
 		.name = "unittest-i2c-dev",
-		.owner = THIS_MODULE,
 	},
 	.probe = unittest_i2c_dev_probe,
 	.remove = unittest_i2c_dev_remove,
@@ -1761,7 +1763,6 @@ static const struct i2c_device_id unittest_i2c_mux_id[] = {
 static struct i2c_driver unittest_i2c_mux_driver = {
 	.driver = {
 		.name = "unittest-i2c-mux",
-		.owner = THIS_MODULE,
 	},
 	.probe = unittest_i2c_mux_probe,
 	.remove = unittest_i2c_mux_remove,