Linux-libre 4.8.2-gnupck-4.8.2-gnu

15 files changed, 320 insertions, 155 deletions

diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index b3bec3aaa..bc07ad30c 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -74,6 +74,7 @@ config OF_NET
 config OF_MDIO
 	def_tristate PHYLIB
 	depends on PHYLIB
+	select FIXED_PHY
 	help
 	  OpenFirmware MDIO bus (Ethernet PHY) accessors
 
diff --git a/drivers/of/address.c b/drivers/of/address.c
index 0a553c084..02b2903fe 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -1,4 +1,6 @@
 
+#define pr_fmt(fmt)	"OF: " fmt
+
 #include <linux/device.h>
 #include <linux/io.h>
 #include <linux/ioport.h>
@@ -24,10 +26,10 @@ static int __of_address_to_resource(struct device_node *dev,
 #ifdef DEBUG
 static void of_dump_addr(const char *s, const __be32 *addr, int na)
 {
-	printk(KERN_DEBUG "%s", s);
+	pr_debug("%s", s);
 	while (na--)
-		printk(" %08x", be32_to_cpu(*(addr++)));
-	printk("\n");
+		pr_cont(" %08x", be32_to_cpu(*(addr++)));
+	pr_cont("\n");
 }
 #else
 static void of_dump_addr(const char *s, const __be32 *addr, int na) { }
@@ -68,7 +70,7 @@ static u64 of_bus_default_map(__be32 *addr, const __be32 *range,
 	s  = of_read_number(range + na + pna, ns);
 	da = of_read_number(addr, na);
 
-	pr_debug("OF: default map, cp=%llx, s=%llx, da=%llx\n",
+	pr_debug("default map, cp=%llx, s=%llx, da=%llx\n",
 		 (unsigned long long)cp, (unsigned long long)s,
 		 (unsigned long long)da);
 
@@ -156,7 +158,7 @@ static u64 of_bus_pci_map(__be32 *addr, const __be32 *range, int na, int ns,
 	s  = of_read_number(range + na + pna, ns);
 	da = of_read_number(addr + 1, na - 1);
 
-	pr_debug("OF: PCI map, cp=%llx, s=%llx, da=%llx\n",
+	pr_debug("PCI map, cp=%llx, s=%llx, da=%llx\n",
 		 (unsigned long long)cp, (unsigned long long)s,
 		 (unsigned long long)da);
 
@@ -381,7 +383,7 @@ static u64 of_bus_isa_map(__be32 *addr, const __be32 *range, int na, int ns,
 	s  = of_read_number(range + na + pna, ns);
 	da = of_read_number(addr + 1, na - 1);
 
-	pr_debug("OF: ISA map, cp=%llx, s=%llx, da=%llx\n",
+	pr_debug("ISA map, cp=%llx, s=%llx, da=%llx\n",
 		 (unsigned long long)cp, (unsigned long long)s,
 		 (unsigned long long)da);
 
@@ -504,17 +506,17 @@ static int of_translate_one(struct device_node *parent, struct of_bus *bus,
 	 */
 	ranges = of_get_property(parent, rprop, &rlen);
 	if (ranges == NULL && !of_empty_ranges_quirk(parent)) {
-		pr_debug("OF: no ranges; cannot translate\n");
+		pr_debug("no ranges; cannot translate\n");
 		return 1;
 	}
 	if (ranges == NULL || rlen == 0) {
 		offset = of_read_number(addr, na);
 		memset(addr, 0, pna * 4);
-		pr_debug("OF: empty ranges; 1:1 translation\n");
+		pr_debug("empty ranges; 1:1 translation\n");
 		goto finish;
 	}
 
-	pr_debug("OF: walking ranges...\n");
+	pr_debug("walking ranges...\n");
 
 	/* Now walk through the ranges */
 	rlen /= 4;
@@ -525,14 +527,14 @@ static int of_translate_one(struct device_node *parent, struct of_bus *bus,
 			break;
 	}
 	if (offset == OF_BAD_ADDR) {
-		pr_debug("OF: not found !\n");
+		pr_debug("not found !\n");
 		return 1;
 	}
 	memcpy(addr, ranges + na, 4 * pna);
 
  finish:
-	of_dump_addr("OF: parent translation for:", addr, pna);
-	pr_debug("OF: with offset: %llx\n", (unsigned long long)offset);
+	of_dump_addr("parent translation for:", addr, pna);
+	pr_debug("with offset: %llx\n", (unsigned long long)offset);
 
 	/* Translate it into parent bus space */
 	return pbus->translate(addr, offset, pna);
@@ -557,7 +559,7 @@ static u64 __of_translate_address(struct device_node *dev,
 	int na, ns, pna, pns;
 	u64 result = OF_BAD_ADDR;
 
-	pr_debug("OF: ** translation for device %s **\n", of_node_full_name(dev));
+	pr_debug("** translation for device %s **\n", of_node_full_name(dev));
 
 	/* Increase refcount at current level */
 	of_node_get(dev);
@@ -571,14 +573,14 @@ static u64 __of_translate_address(struct device_node *dev,
 	/* Count address cells & copy address locally */
 	bus->count_cells(dev, &na, &ns);
 	if (!OF_CHECK_COUNTS(na, ns)) {
-		pr_debug("OF: Bad cell count for %s\n", of_node_full_name(dev));
+		pr_debug("Bad cell count for %s\n", of_node_full_name(dev));
 		goto bail;
 	}
 	memcpy(addr, in_addr, na * 4);
 
-	pr_debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
+	pr_debug("bus is %s (na=%d, ns=%d) on %s\n",
 	    bus->name, na, ns, of_node_full_name(parent));
-	of_dump_addr("OF: translating address:", addr, na);
+	of_dump_addr("translating address:", addr, na);
 
 	/* Translate */
 	for (;;) {
@@ -589,7 +591,7 @@ static u64 __of_translate_address(struct device_node *dev,
 
 		/* If root, we have finished */
 		if (parent == NULL) {
-			pr_debug("OF: reached root node\n");
+			pr_debug("reached root node\n");
 			result = of_read_number(addr, na);
 			break;
 		}
@@ -598,12 +600,12 @@ static u64 __of_translate_address(struct device_node *dev,
 		pbus = of_match_bus(parent);
 		pbus->count_cells(dev, &pna, &pns);
 		if (!OF_CHECK_COUNTS(pna, pns)) {
-			pr_err("prom_parse: Bad cell count for %s\n",
+			pr_err("Bad cell count for %s\n",
 			       of_node_full_name(dev));
 			break;
 		}
 
-		pr_debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
+		pr_debug("parent bus is %s (na=%d, ns=%d) on %s\n",
 		    pbus->name, pna, pns, of_node_full_name(parent));
 
 		/* Apply bus translation */
@@ -615,7 +617,7 @@ static u64 __of_translate_address(struct device_node *dev,
 		ns = pns;
 		bus = pbus;
 
-		of_dump_addr("OF: one level translation:", addr, na);
+		of_dump_addr("one level translation:", addr, na);
 	}
  bail:
 	of_node_put(parent);
@@ -853,8 +855,7 @@ int of_dma_get_range(struct device_node *np, u64 *dma_addr, u64 *paddr, u64 *siz
 	}
 
 	if (!ranges) {
-		pr_debug("%s: no dma-ranges found for node(%s)\n",
-			 __func__, np->full_name);
+		pr_debug("no dma-ranges found for node(%s)\n", np->full_name);
 		ret = -ENODEV;
 		goto out;
 	}
@@ -871,8 +872,8 @@ int of_dma_get_range(struct device_node *np, u64 *dma_addr, u64 *paddr, u64 *siz
 	dmaaddr = of_read_number(ranges, naddr);
 	*paddr = of_translate_dma_address(np, ranges);
 	if (*paddr == OF_BAD_ADDR) {
-		pr_err("%s: translation of DMA address(%pad) to CPU address failed node(%s)\n",
-		       __func__, dma_addr, np->full_name);
+		pr_err("translation of DMA address(%pad) to CPU address failed node(%s)\n",
+		       dma_addr, np->full_name);
 		ret = -EINVAL;
 		goto out;
 	}
diff --git a/drivers/of/base.c b/drivers/of/base.c
index c6a8f47f5..3ce69536a 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -17,6 +17,9 @@
  *      as published by the Free Software Foundation; either version
  *      2 of the License, or (at your option) any later version.
  */
+
+#define pr_fmt(fmt)	"OF: " fmt
+
 #include <linux/console.h>
 #include <linux/ctype.h>
 #include <linux/cpu.h>
@@ -130,7 +133,7 @@ static const char *safe_name(struct kobject *kobj, const char *orig_name)
 	if (name == orig_name) {
 		name = kstrdup(orig_name, GFP_KERNEL);
 	} else {
-		pr_warn("device-tree: Duplicate name in %s, renamed to \"%s\"\n",
+		pr_warn("Duplicate name in %s, renamed to \"%s\"\n",
 			kobject_name(kobj), name);
 	}
 	return name;
@@ -204,7 +207,7 @@ void __init of_core_init(void)
 	of_kset = kset_create_and_add("devicetree", NULL, firmware_kobj);
 	if (!of_kset) {
 		mutex_unlock(&of_mutex);
-		pr_err("devicetree: failed to register existing nodes\n");
+		pr_err("failed to register existing nodes\n");
 		return;
 	}
 	for_each_of_allnodes(np)
@@ -499,6 +502,28 @@ int of_device_is_compatible(const struct device_node *device,
 }
 EXPORT_SYMBOL(of_device_is_compatible);
 
+/** Checks if the device is compatible with any of the entries in
+ *  a NULL terminated array of strings. Returns the best match
+ *  score or 0.
+ */
+int of_device_compatible_match(struct device_node *device,
+			       const char *const *compat)
+{
+	unsigned int tmp, score = 0;
+
+	if (!compat)
+		return 0;
+
+	while (*compat) {
+		tmp = of_device_is_compatible(device, *compat);
+		if (tmp > score)
+			score = tmp;
+		compat++;
+	}
+
+	return score;
+}
+
 /**
  * of_machine_is_compatible - Test root of device tree for a given compatible value
  * @compat: compatible string to look for in root node's compatible property.
@@ -1606,8 +1631,7 @@ static int __of_parse_phandle_with_args(const struct device_node *np,
 	 */
 
  err:
-	if (it.node)
-		of_node_put(it.node);
+	of_node_put(it.node);
 	return rc;
 }
 
@@ -2269,8 +2293,8 @@ struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
 		of_node_put(node);
 
 		if (!port) {
-			pr_err("%s(): no port node found in %s\n",
-			       __func__, parent->full_name);
+			pr_err("graph: no port node found in %s\n",
+			       parent->full_name);
 			return NULL;
 		}
 	} else {
diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
index a2015599e..888fdbc09 100644
--- a/drivers/of/dynamic.c
+++ b/drivers/of/dynamic.c
@@ -6,6 +6,8 @@
  * device tree nodes.
  */
 
+#define pr_fmt(fmt)	"OF: " fmt
+
 #include <linux/of.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
@@ -96,13 +98,13 @@ int of_reconfig_notify(unsigned long action, struct of_reconfig_data *p)
 	switch (action) {
 	case OF_RECONFIG_ATTACH_NODE:
 	case OF_RECONFIG_DETACH_NODE:
-		pr_debug("of/notify %-15s %s\n", action_names[action],
+		pr_debug("notify %-15s %s\n", action_names[action],
 			pr->dn->full_name);
 		break;
 	case OF_RECONFIG_ADD_PROPERTY:
 	case OF_RECONFIG_REMOVE_PROPERTY:
 	case OF_RECONFIG_UPDATE_PROPERTY:
-		pr_debug("of/notify %-15s %s:%s\n", action_names[action],
+		pr_debug("notify %-15s %s:%s\n", action_names[action],
 			pr->dn->full_name, pr->prop->name);
 		break;
 
@@ -460,12 +462,12 @@ static void __of_changeset_entry_dump(struct of_changeset_entry *ce)
 	case OF_RECONFIG_ADD_PROPERTY:
 	case OF_RECONFIG_REMOVE_PROPERTY:
 	case OF_RECONFIG_UPDATE_PROPERTY:
-		pr_debug("of/cset<%p> %-15s %s/%s\n", ce, action_names[ce->action],
+		pr_debug("cset<%p> %-15s %s/%s\n", ce, action_names[ce->action],
 			ce->np->full_name, ce->prop->name);
 		break;
 	case OF_RECONFIG_ATTACH_NODE:
 	case OF_RECONFIG_DETACH_NODE:
-		pr_debug("of/cset<%p> %-15s %s\n", ce, action_names[ce->action],
+		pr_debug("cset<%p> %-15s %s\n", ce, action_names[ce->action],
 			ce->np->full_name);
 		break;
 	}
@@ -531,13 +533,13 @@ static void __of_changeset_entry_notify(struct of_changeset_entry *ce, bool reve
 		ret = of_property_notify(ce->action, ce->np, ce->prop, ce->old_prop);
 		break;
 	default:
-		pr_err("%s: invalid devicetree changeset action: %i\n", __func__,
+		pr_err("invalid devicetree changeset action: %i\n",
 			(int)ce->action);
 		return;
 	}
 
 	if (ret)
-		pr_err("%s: notifier error @%s\n", __func__, ce->np->full_name);
+		pr_err("changeset notifier error @%s\n", ce->np->full_name);
 }
 
 static int __of_changeset_entry_apply(struct of_changeset_entry *ce)
@@ -568,8 +570,8 @@ static int __of_changeset_entry_apply(struct of_changeset_entry *ce)
 
 		ret = __of_add_property(ce->np, ce->prop);
 		if (ret) {
-			pr_err("%s: add_property failed @%s/%s\n",
-				__func__, ce->np->full_name,
+			pr_err("changeset: add_property failed @%s/%s\n",
+				ce->np->full_name,
 				ce->prop->name);
 			break;
 		}
@@ -577,8 +579,8 @@ static int __of_changeset_entry_apply(struct of_changeset_entry *ce)
 	case OF_RECONFIG_REMOVE_PROPERTY:
 		ret = __of_remove_property(ce->np, ce->prop);
 		if (ret) {
-			pr_err("%s: remove_property failed @%s/%s\n",
-				__func__, ce->np->full_name,
+			pr_err("changeset: remove_property failed @%s/%s\n",
+				ce->np->full_name,
 				ce->prop->name);
 			break;
 		}
@@ -596,8 +598,8 @@ static int __of_changeset_entry_apply(struct of_changeset_entry *ce)
 
 		ret = __of_update_property(ce->np, ce->prop, &old_prop);
 		if (ret) {
-			pr_err("%s: update_property failed @%s/%s\n",
-				__func__, ce->np->full_name,
+			pr_err("changeset: update_property failed @%s/%s\n",
+				ce->np->full_name,
 				ce->prop->name);
 			break;
 		}
@@ -677,24 +679,24 @@ int __of_changeset_apply(struct of_changeset *ocs)
 	int ret;
 
 	/* perform the rest of the work */
-	pr_debug("of_changeset: applying...\n");
+	pr_debug("changeset: applying...\n");
 	list_for_each_entry(ce, &ocs->entries, node) {
 		ret = __of_changeset_entry_apply(ce);
 		if (ret) {
-			pr_err("%s: Error applying changeset (%d)\n", __func__, ret);
+			pr_err("Error applying changeset (%d)\n", ret);
 			list_for_each_entry_continue_reverse(ce, &ocs->entries, node)
 				__of_changeset_entry_revert(ce);
 			return ret;
 		}
 	}
-	pr_debug("of_changeset: applied, emitting notifiers.\n");
+	pr_debug("changeset: applied, emitting notifiers.\n");
 
 	/* drop the global lock while emitting notifiers */
 	mutex_unlock(&of_mutex);
 	list_for_each_entry(ce, &ocs->entries, node)
 		__of_changeset_entry_notify(ce, 0);
 	mutex_lock(&of_mutex);
-	pr_debug("of_changeset: notifiers sent.\n");
+	pr_debug("changeset: notifiers sent.\n");
 
 	return 0;
 }
@@ -728,24 +730,24 @@ int __of_changeset_revert(struct of_changeset *ocs)
 	struct of_changeset_entry *ce;
 	int ret;
 
-	pr_debug("of_changeset: reverting...\n");
+	pr_debug("changeset: reverting...\n");
 	list_for_each_entry_reverse(ce, &ocs->entries, node) {
 		ret = __of_changeset_entry_revert(ce);
 		if (ret) {
-			pr_err("%s: Error reverting changeset (%d)\n", __func__, ret);
+			pr_err("Error reverting changeset (%d)\n", ret);
 			list_for_each_entry_continue(ce, &ocs->entries, node)
 				__of_changeset_entry_apply(ce);
 			return ret;
 		}
 	}
-	pr_debug("of_changeset: reverted, emitting notifiers.\n");
+	pr_debug("changeset: reverted, emitting notifiers.\n");
 
 	/* drop the global lock while emitting notifiers */
 	mutex_unlock(&of_mutex);
 	list_for_each_entry_reverse(ce, &ocs->entries, node)
 		__of_changeset_entry_notify(ce, 1);
 	mutex_lock(&of_mutex);
-	pr_debug("of_changeset: notifiers sent.\n");
+	pr_debug("changeset: notifiers sent.\n");
 
 	return 0;
 }
@@ -795,10 +797,9 @@ int of_changeset_action(struct of_changeset *ocs, unsigned long action,
 	struct of_changeset_entry *ce;
 
 	ce = kzalloc(sizeof(*ce), GFP_KERNEL);
-	if (!ce) {
-		pr_err("%s: Failed to allocate\n", __func__);
+	if (!ce)
 		return -ENOMEM;
-	}
+
 	/* get a reference to the node */
 	ce->action = action;
 	ce->np = of_node_get(np);
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 33daffc43..085c6389a 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -9,6 +9,8 @@
  * version 2 as published by the Free Software Foundation.
  */
 
+#define pr_fmt(fmt)	"OF: fdt:" fmt
+
 #include <linux/crc32.h>
 #include <linux/kernel.h>
 #include <linux/initrd.h>
@@ -182,14 +184,12 @@ static void populate_properties(const void *blob,
 
 		val = fdt_getprop_by_offset(blob, cur, &pname, &sz);
 		if (!val) {
-			pr_warn("%s: Cannot locate property at 0x%x\n",
-				__func__, cur);
+			pr_warn("Cannot locate property at 0x%x\n", cur);
 			continue;
 		}
 
 		if (!pname) {
-			pr_warn("%s: Cannot find property name at 0x%x\n",
-				__func__, cur);
+			pr_warn("Cannot find property name at 0x%x\n", cur);
 			continue;
 		}
 
@@ -439,7 +439,7 @@ static int unflatten_dt_nodes(const void *blob,
 	}
 
 	if (offset < 0 && offset != -FDT_ERR_NOTFOUND) {
-		pr_err("%s: Error %d processing FDT\n", __func__, offset);
+		pr_err("Error %d processing FDT\n", offset);
 		return -EINVAL;
 	}
 
@@ -472,7 +472,8 @@ static int unflatten_dt_nodes(const void *blob,
 static void *__unflatten_device_tree(const void *blob,
 				     struct device_node *dad,
 				     struct device_node **mynodes,
-				     void *(*dt_alloc)(u64 size, u64 align))
+				     void *(*dt_alloc)(u64 size, u64 align),
+				     bool detached)
 {
 	int size;
 	void *mem;
@@ -516,6 +517,11 @@ static void *__unflatten_device_tree(const void *blob,
 		pr_warning("End of tree marker overwritten: %08x\n",
 			   be32_to_cpup(mem + size));
 
+	if (detached && mynodes) {
+		of_node_set_flag(*mynodes, OF_DETACHED);
+		pr_debug("unflattened tree is detached\n");
+	}
+
 	pr_debug(" <- unflatten_device_tree()\n");
 	return mem;
 }
@@ -548,7 +554,8 @@ void *of_fdt_unflatten_tree(const unsigned long *blob,
 	void *mem;
 
 	mutex_lock(&of_fdt_unflatten_mutex);
-	mem = __unflatten_device_tree(blob, dad, mynodes, &kernel_tree_alloc);
+	mem = __unflatten_device_tree(blob, dad, mynodes, &kernel_tree_alloc,
+				      true);
 	mutex_unlock(&of_fdt_unflatten_mutex);
 
 	return mem;
@@ -744,6 +751,19 @@ int __init of_scan_flat_dt(int (*it)(unsigned long node,
 }
 
 /**
+ * of_get_flat_dt_subnode_by_name - get the subnode by given name
+ *
+ * @node: the parent node
+ * @uname: the name of subnode
+ * @return offset of the subnode, or -FDT_ERR_NOTFOUND if there is none
+ */
+
+int of_get_flat_dt_subnode_by_name(unsigned long node, const char *uname)
+{
+	return fdt_subnode_offset(initial_boot_params, node, uname);
+}
+
+/**
  * of_get_flat_dt_root - find the root node in the flat blob
  */
 unsigned long __init of_get_flat_dt_root(void)
@@ -1224,7 +1244,7 @@ bool __init early_init_dt_scan(void *params)
 void __init unflatten_device_tree(void)
 {
 	__unflatten_device_tree(initial_boot_params, NULL, &of_root,
-				early_init_dt_alloc_memory_arch);
+				early_init_dt_alloc_memory_arch, false);
 
 	/* Get pointer to "/chosen" and "/aliases" nodes for use everywhere */
 	of_alias_scan(early_init_dt_alloc_memory_arch);
@@ -1281,7 +1301,7 @@ static int __init of_fdt_raw_init(void)
 
 	if (of_fdt_crc32 != crc32_be(~0, initial_boot_params,
 				     fdt_totalsize(initial_boot_params))) {
-		pr_warn("fdt: not creating '/sys/firmware/fdt': CRC check failed\n");
+		pr_warn("not creating '/sys/firmware/fdt': CRC check failed\n");
 		return 0;
 	}
 	of_fdt_raw_attr.size = fdt_totalsize(initial_boot_params);
diff --git a/drivers/of/fdt_address.c b/drivers/of/fdt_address.c
index dca8f9b93..843a542da 100644
--- a/drivers/of/fdt_address.c
+++ b/drivers/of/fdt_address.c
@@ -12,6 +12,9 @@
  * the Free Software Foundation; either version 2, or (at your option)
  * any later version.
  */
+
+#define pr_fmt(fmt)	"OF: fdt: " fmt
+
 #include <linux/kernel.h>
 #include <linux/libfdt.h>
 #include <linux/of.h>
@@ -30,7 +33,7 @@ static void __init of_dump_addr(const char *s, const __be32 *addr, int na)
 	pr_debug("%s", s);
 	while(na--)
 		pr_cont(" %08x", *(addr++));
-	pr_debug("\n");
+	pr_cont("\n");
 }
 #else
 static void __init of_dump_addr(const char *s, const __be32 *addr, int na) { }
@@ -77,7 +80,7 @@ static u64 __init fdt_bus_default_map(__be32 *addr, const __be32 *range,
 	s  = of_read_number(range + na + pna, ns);
 	da = of_read_number(addr, na);
 
-	pr_debug("FDT: default map, cp=%llx, s=%llx, da=%llx\n",
+	pr_debug("default map, cp=%llx, s=%llx, da=%llx\n",
 	    cp, s, da);
 
 	if (da < cp || da >= (cp + s))
@@ -123,11 +126,11 @@ static int __init fdt_translate_one(const void *blob, int parent,
 	if (rlen == 0) {
 		offset = of_read_number(addr, na);
 		memset(addr, 0, pna * 4);
-		pr_debug("FDT: empty ranges, 1:1 translation\n");
+		pr_debug("empty ranges, 1:1 translation\n");
 		goto finish;
 	}
 
-	pr_debug("FDT: walking ranges...\n");
+	pr_debug("walking ranges...\n");
 
 	/* Now walk through the ranges */
 	rlen /= 4;
@@ -138,14 +141,14 @@ static int __init fdt_translate_one(const void *blob, int parent,
 			break;
 	}
 	if (offset == OF_BAD_ADDR) {
-		pr_debug("FDT: not found !\n");
+		pr_debug("not found !\n");
 		return 1;
 	}
 	memcpy(addr, ranges + na, 4 * pna);
 
  finish:
-	of_dump_addr("FDT: parent translation for:", addr, pna);
-	pr_debug("FDT: with offset: %llx\n", offset);
+	of_dump_addr("parent translation for:", addr, pna);
+	pr_debug("with offset: %llx\n", offset);
 
 	/* Translate it into parent bus space */
 	return pbus->translate(addr, offset, pna);
@@ -170,12 +173,12 @@ static u64 __init fdt_translate_address(const void *blob, int node_offset)
 	int na, ns, pna, pns;
 	u64 result = OF_BAD_ADDR;
 
-	pr_debug("FDT: ** translation for device %s **\n",
+	pr_debug("** translation for device %s **\n",
 		 fdt_get_name(blob, node_offset, NULL));
 
 	reg = fdt_getprop(blob, node_offset, "reg", &len);
 	if (!reg) {
-		pr_err("FDT: warning: device tree node '%s' has no address.\n",
+		pr_err("warning: device tree node '%s' has no address.\n",
 			fdt_get_name(blob, node_offset, NULL));
 		goto bail;
 	}
@@ -189,15 +192,15 @@ static u64 __init fdt_translate_address(const void *blob, int node_offset)
 	/* Cound address cells & copy address locally */
 	bus->count_cells(blob, parent, &na, &ns);
 	if (!OF_CHECK_COUNTS(na, ns)) {
-		pr_err("FDT: Bad cell count for %s\n",
+		pr_err("Bad cell count for %s\n",
 		       fdt_get_name(blob, node_offset, NULL));
 		goto bail;
 	}
 	memcpy(addr, reg, na * 4);
 
-	pr_debug("FDT: bus (na=%d, ns=%d) on %s\n",
+	pr_debug("bus (na=%d, ns=%d) on %s\n",
 		 na, ns, fdt_get_name(blob, parent, NULL));
-	of_dump_addr("OF: translating address:", addr, na);
+	of_dump_addr("translating address:", addr, na);
 
 	/* Translate */
 	for (;;) {
@@ -207,7 +210,7 @@ static u64 __init fdt_translate_address(const void *blob, int node_offset)
 
 		/* If root, we have finished */
 		if (parent < 0) {
-			pr_debug("FDT: reached root node\n");
+			pr_debug("reached root node\n");
 			result = of_read_number(addr, na);
 			break;
 		}
@@ -216,12 +219,12 @@ static u64 __init fdt_translate_address(const void *blob, int node_offset)
 		pbus = &of_busses[0];
 		pbus->count_cells(blob, parent, &pna, &pns);
 		if (!OF_CHECK_COUNTS(pna, pns)) {
-			pr_err("FDT: Bad cell count for %s\n",
+			pr_err("Bad cell count for %s\n",
 				fdt_get_name(blob, node_offset, NULL));
 			break;
 		}
 
-		pr_debug("FDT: parent bus (na=%d, ns=%d) on %s\n",
+		pr_debug("parent bus (na=%d, ns=%d) on %s\n",
 			 pna, pns, fdt_get_name(blob, parent, NULL));
 
 		/* Apply bus translation */
@@ -234,7 +237,7 @@ static u64 __init fdt_translate_address(const void *blob, int node_offset)
 		ns = pns;
 		bus = pbus;
 
-		of_dump_addr("FDT: one level translation:", addr, na);
+		of_dump_addr("one level translation:", addr, na);
 	}
  bail:
 	return result;
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 6ec743faa..a2e68f740 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -18,6 +18,8 @@
  * driver.
  */
 
+#define pr_fmt(fmt)	"OF: " fmt
+
 #include <linux/device.h>
 #include <linux/errno.h>
 #include <linux/list.h>
@@ -542,12 +544,15 @@ void __init of_irq_init(const struct of_device_id *matches)
 
 			list_del(&desc->list);
 
+			of_node_set_flag(desc->dev, OF_POPULATED);
+
 			pr_debug("of_irq_init: init %s (%p), parent %p\n",
 				 desc->dev->full_name,
 				 desc->dev, desc->interrupt_parent);
 			ret = desc->irq_init_cb(desc->dev,
 						desc->interrupt_parent);
 			if (ret) {
+				of_node_clear_flag(desc->dev, OF_POPULATED);
 				kfree(desc);
 				continue;
 			}
diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index e051e1b57..b470f7e35 100644
--- a/drivers/of/of_mdio.c
+++ b/drivers/of/of_mdio.c
@@ -19,6 +19,7 @@
 #include <linux/of_gpio.h>
 #include <linux/of_irq.h>
 #include <linux/of_mdio.h>
+#include <linux/of_net.h>
 #include <linux/module.h>
 
 MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
@@ -332,6 +333,41 @@ struct phy_device *of_phy_connect(struct net_device *dev,
 EXPORT_SYMBOL(of_phy_connect);
 
 /**
+ * of_phy_get_and_connect
+ * - Get phy node and connect to the phy described in the device tree
+ * @dev: pointer to net_device claiming the phy
+ * @np: Pointer to device tree node for the net_device claiming the phy
+ * @hndlr: Link state callback for the network device
+ *
+ * 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_get_and_connect(struct net_device *dev,
+					  struct device_node *np,
+					  void (*hndlr)(struct net_device *))
+{
+	phy_interface_t iface;
+	struct device_node *phy_np;
+	struct phy_device *phy;
+
+	iface = of_get_phy_mode(np);
+	if (iface < 0)
+		return NULL;
+
+	phy_np = of_parse_phandle(np, "phy-handle", 0);
+	if (!phy_np)
+		return NULL;
+
+	phy = of_phy_connect(dev, phy_np, hndlr, 0, iface);
+
+	of_node_put(phy_np);
+
+	return phy;
+}
+EXPORT_SYMBOL(of_phy_get_and_connect);
+
+/**
  * of_phy_attach - Attach to a PHY without starting the state machine
  * @dev: pointer to net_device claiming the phy
  * @phy_np: Node pointer for the PHY
@@ -361,7 +397,6 @@ struct phy_device *of_phy_attach(struct net_device *dev,
 }
 EXPORT_SYMBOL(of_phy_attach);
 
-#if defined(CONFIG_FIXED_PHY)
 /*
  * of_phy_is_fixed_link() and of_phy_register_fixed_link() must
  * support two DT bindings:
@@ -451,4 +486,3 @@ int of_phy_register_fixed_link(struct device_node *np)
 	return -ENODEV;
 }
 EXPORT_SYMBOL(of_phy_register_fixed_link);
-#endif
diff --git a/drivers/of/of_numa.c b/drivers/of/of_numa.c
index 0f2784bc1..ed5a097f0 100644
--- a/drivers/of/of_numa.c
+++ b/drivers/of/of_numa.c
@@ -91,8 +91,8 @@ static int __init of_numa_parse_memory_nodes(void)
 		pr_debug("NUMA:  base = %llx len = %llx, node = %u\n",
 			 rsrc.start, rsrc.end - rsrc.start + 1, nid);
 
-		r = numa_add_memblk(nid, rsrc.start,
-				    rsrc.end - rsrc.start + 1);
+
+		r = numa_add_memblk(nid, rsrc.start, rsrc.end + 1);
 		if (r)
 			break;
 	}
diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
index 13f4fed38..589b30c68 100644
--- a/drivers/of/of_pci.c
+++ b/drivers/of/of_pci.c
@@ -1,3 +1,5 @@
+#define pr_fmt(fmt)	"OF: PCI: " fmt
+
 #include <linux/kernel.h>
 #include <linux/export.h>
 #include <linux/of.h>
@@ -138,7 +140,7 @@ void of_pci_check_probe_only(void)
 	else
 		pci_clear_flags(PCI_PROBE_ONLY);
 
-	pr_info("PCI: PROBE_ONLY %sabled\n", val ? "en" : "dis");
+	pr_info("PROBE_ONLY %sabled\n", val ? "en" : "dis");
 }
 EXPORT_SYMBOL_GPL(of_pci_check_probe_only);
 
@@ -181,7 +183,7 @@ int of_pci_get_host_bridge_resources(struct device_node *dev,
 	if (!bus_range)
 		return -ENOMEM;
 
-	pr_info("PCI host bridge %s ranges:\n", dev->full_name);
+	pr_info("host bridge %s ranges:\n", dev->full_name);
 
 	err = of_pci_parse_bus_range(dev, bus_range);
 	if (err) {
diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index 216648233..366d8c3c7 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -13,6 +13,8 @@
  * License or (at your optional) any later version of the license.
  */
 
+#define pr_fmt(fmt)	"OF: reserved mem: " fmt
+
 #include <linux/err.h>
 #include <linux/of.h>
 #include <linux/of_fdt.h>
@@ -21,6 +23,7 @@
 #include <linux/sizes.h>
 #include <linux/of_reserved_mem.h>
 #include <linux/sort.h>
+#include <linux/slab.h>
 
 #define MAX_RESERVED_REGIONS	16
 static struct reserved_mem reserved_mem[MAX_RESERVED_REGIONS];
@@ -75,7 +78,7 @@ void __init fdt_reserved_mem_save_node(unsigned long node, const char *uname,
 	struct reserved_mem *rmem = &reserved_mem[reserved_mem_count];
 
 	if (reserved_mem_count == ARRAY_SIZE(reserved_mem)) {
-		pr_err("Reserved memory: not enough space all defined regions.\n");
+		pr_err("not enough space all defined regions.\n");
 		return;
 	}
 
@@ -108,8 +111,7 @@ static int __init __reserved_mem_alloc_size(unsigned long node,
 		return -EINVAL;
 
 	if (len != dt_root_size_cells * sizeof(__be32)) {
-		pr_err("Reserved memory: invalid size property in '%s' node.\n",
-				uname);
+		pr_err("invalid size property in '%s' node.\n", uname);
 		return -EINVAL;
 	}
 	size = dt_mem_next_cell(dt_root_size_cells, &prop);
@@ -119,7 +121,7 @@ static int __init __reserved_mem_alloc_size(unsigned long node,
 	prop = of_get_flat_dt_prop(node, "alignment", &len);
 	if (prop) {
 		if (len != dt_root_addr_cells * sizeof(__be32)) {
-			pr_err("Reserved memory: invalid alignment property in '%s' node.\n",
+			pr_err("invalid alignment property in '%s' node.\n",
 				uname);
 			return -EINVAL;
 		}
@@ -141,7 +143,7 @@ static int __init __reserved_mem_alloc_size(unsigned long node,
 	if (prop) {
 
 		if (len % t_len != 0) {
-			pr_err("Reserved memory: invalid alloc-ranges property in '%s', skipping node.\n",
+			pr_err("invalid alloc-ranges property in '%s', skipping node.\n",
 			       uname);
 			return -EINVAL;
 		}
@@ -156,7 +158,7 @@ static int __init __reserved_mem_alloc_size(unsigned long node,
 			ret = early_init_dt_alloc_reserved_memory_arch(size,
 					align, start, end, nomap, &base);
 			if (ret == 0) {
-				pr_debug("Reserved memory: allocated memory for '%s' node: base %pa, size %ld MiB\n",
+				pr_debug("allocated memory for '%s' node: base %pa, size %ld MiB\n",
 					uname, &base,
 					(unsigned long)size / SZ_1M);
 				break;
@@ -168,13 +170,12 @@ static int __init __reserved_mem_alloc_size(unsigned long node,
 		ret = early_init_dt_alloc_reserved_memory_arch(size, align,
 							0, 0, nomap, &base);
 		if (ret == 0)
-			pr_debug("Reserved memory: allocated memory for '%s' node: base %pa, size %ld MiB\n",
+			pr_debug("allocated memory for '%s' node: base %pa, size %ld MiB\n",
 				uname, &base, (unsigned long)size / SZ_1M);
 	}
 
 	if (base == 0) {
-		pr_info("Reserved memory: failed to allocate memory for node '%s'\n",
-			uname);
+		pr_info("failed to allocate memory for node '%s'\n", uname);
 		return -ENOMEM;
 	}
 
@@ -203,7 +204,7 @@ static int __init __reserved_mem_init_node(struct reserved_mem *rmem)
 			continue;
 
 		if (initfn(rmem) == 0) {
-			pr_info("Reserved memory: initialized node %s, compatible id %s\n",
+			pr_info("initialized node %s, compatible id %s\n",
 				rmem->name, compat);
 			return 0;
 		}
@@ -245,7 +246,7 @@ static void __init __rmem_check_for_overlap(void)
 
 			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",
+			pr_err("OVERLAP DETECTED!\n%s (%pa--%pa) overlaps with %s (%pa--%pa)\n",
 			       this->name, &this->base, &this_end,
 			       next->name, &next->base, &next_end);
 		}
@@ -296,53 +297,95 @@ static inline struct reserved_mem *__find_rmem(struct device_node *node)
 	return NULL;
 }
 
+struct rmem_assigned_device {
+	struct device *dev;
+	struct reserved_mem *rmem;
+	struct list_head list;
+};
+
+static LIST_HEAD(of_rmem_assigned_device_list);
+static DEFINE_MUTEX(of_rmem_assigned_device_mutex);
+
 /**
- * of_reserved_mem_device_init() - assign reserved memory region to given device
+ * of_reserved_mem_device_init_by_idx() - assign reserved memory region to
+ *					  given device
+ * @dev:	Pointer to the device to configure
+ * @np:		Pointer to the device_node with 'reserved-memory' property
+ * @idx:	Index of selected region
  *
- * This function assign memory region pointed by "memory-region" device tree
- * property to the given device.
+ * This function assigns respective DMA-mapping operations based on reserved
+ * memory region specified by 'memory-region' property in @np node to the @dev
+ * device. When driver needs to use more than one reserved memory region, it
+ * should allocate child devices and initialize regions by name for each of
+ * child device.
+ *
+ * Returns error code or zero on success.
  */
-int of_reserved_mem_device_init(struct device *dev)
+int of_reserved_mem_device_init_by_idx(struct device *dev,
+				       struct device_node *np, int idx)
 {
+	struct rmem_assigned_device *rd;
+	struct device_node *target;
 	struct reserved_mem *rmem;
-	struct device_node *np;
 	int ret;
 
-	np = of_parse_phandle(dev->of_node, "memory-region", 0);
-	if (!np)
+	if (!np || !dev)
+		return -EINVAL;
+
+	target = of_parse_phandle(np, "memory-region", idx);
+	if (!target)
 		return -ENODEV;
 
-	rmem = __find_rmem(np);
-	of_node_put(np);
+	rmem = __find_rmem(target);
+	of_node_put(target);
 
 	if (!rmem || !rmem->ops || !rmem->ops->device_init)
 		return -EINVAL;
 
+	rd = kmalloc(sizeof(struct rmem_assigned_device), GFP_KERNEL);
+	if (!rd)
+		return -ENOMEM;
+
 	ret = rmem->ops->device_init(rmem, dev);
-	if (ret == 0)
+	if (ret == 0) {
+		rd->dev = dev;
+		rd->rmem = rmem;
+
+		mutex_lock(&of_rmem_assigned_device_mutex);
+		list_add(&rd->list, &of_rmem_assigned_device_list);
+		mutex_unlock(&of_rmem_assigned_device_mutex);
+
 		dev_info(dev, "assigned reserved memory node %s\n", rmem->name);
+	} else {
+		kfree(rd);
+	}
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(of_reserved_mem_device_init);
+EXPORT_SYMBOL_GPL(of_reserved_mem_device_init_by_idx);
 
 /**
  * of_reserved_mem_device_release() - release reserved memory device structures
+ * @dev:	Pointer to the device to deconfigure
  *
  * This function releases structures allocated for memory region handling for
  * the given device.
  */
 void of_reserved_mem_device_release(struct device *dev)
 {
-	struct reserved_mem *rmem;
-	struct device_node *np;
-
-	np = of_parse_phandle(dev->of_node, "memory-region", 0);
-	if (!np)
-		return;
-
-	rmem = __find_rmem(np);
-	of_node_put(np);
+	struct rmem_assigned_device *rd;
+	struct reserved_mem *rmem = NULL;
+
+	mutex_lock(&of_rmem_assigned_device_mutex);
+	list_for_each_entry(rd, &of_rmem_assigned_device_list, list) {
+		if (rd->dev == dev) {
+			rmem = rd->rmem;
+			list_del(&rd->list);
+			kfree(rd);
+			break;
+		}
+	}
+	mutex_unlock(&of_rmem_assigned_device_mutex);
 
 	if (!rmem || !rmem->ops || !rmem->ops->device_release)
 		return;
diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c
index 82250815e..318dbb51e 100644
--- a/drivers/of/overlay.c
+++ b/drivers/of/overlay.c
@@ -8,7 +8,9 @@
  * modify it under the terms of the GNU General Public License
  * version 2 as published by the Free Software Foundation.
  */
-#undef DEBUG
+
+#define pr_fmt(fmt)	"OF: overlay: " fmt
+
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of.h>
@@ -137,8 +139,8 @@ static int of_overlay_apply_one(struct of_overlay *ov,
 	for_each_property_of_node(overlay, prop) {
 		ret = of_overlay_apply_single_property(ov, target, prop);
 		if (ret) {
-			pr_err("%s: Failed to apply prop @%s/%s\n",
-				__func__, target->full_name, prop->name);
+			pr_err("Failed to apply prop @%s/%s\n",
+			       target->full_name, prop->name);
 			return ret;
 		}
 	}
@@ -146,9 +148,8 @@ static int of_overlay_apply_one(struct of_overlay *ov,
 	for_each_child_of_node(overlay, child) {
 		ret = of_overlay_apply_single_device_node(ov, target, child);
 		if (ret != 0) {
-			pr_err("%s: Failed to apply single node @%s/%s\n",
-					__func__, target->full_name,
-					child->name);
+			pr_err("Failed to apply single node @%s/%s\n",
+			       target->full_name, child->name);
 			of_node_put(child);
 			return ret;
 		}
@@ -176,8 +177,7 @@ static int of_overlay_apply(struct of_overlay *ov)
 
 		err = of_overlay_apply_one(ov, ovinfo->target, ovinfo->overlay);
 		if (err != 0) {
-			pr_err("%s: overlay failed '%s'\n",
-				__func__, ovinfo->target->full_name);
+			pr_err("apply failed '%s'\n", ovinfo->target->full_name);
 			return err;
 		}
 	}
@@ -208,7 +208,7 @@ static struct device_node *find_target_node(struct device_node *info_node)
 	if (ret == 0)
 		return of_find_node_by_path(path);
 
-	pr_err("%s: Failed to find target for node %p (%s)\n", __func__,
+	pr_err("Failed to find target for node %p (%s)\n",
 		info_node, info_node->name);
 
 	return NULL;
@@ -355,8 +355,6 @@ int of_overlay_create(struct device_node *tree)
 
 	id = idr_alloc(&ov_idr, ov, 0, 0, GFP_KERNEL);
 	if (id < 0) {
-		pr_err("%s: idr_alloc() failed for tree@%s\n",
-				__func__, tree->full_name);
 		err = id;
 		goto err_destroy_trans;
 	}
@@ -365,26 +363,21 @@ int of_overlay_create(struct device_node *tree)
 	/* build the overlay info structures */
 	err = of_build_overlay_info(ov, tree);
 	if (err) {
-		pr_err("%s: of_build_overlay_info() failed for tree@%s\n",
-				__func__, tree->full_name);
+		pr_err("of_build_overlay_info() failed for tree@%s\n",
+		       tree->full_name);
 		goto err_free_idr;
 	}
 
 	/* apply the overlay */
 	err = of_overlay_apply(ov);
-	if (err) {
-		pr_err("%s: of_overlay_apply() failed for tree@%s\n",
-				__func__, tree->full_name);
+	if (err)
 		goto err_abort_trans;
-	}
 
 	/* apply the changeset */
 	err = __of_changeset_apply(&ov->cset);
-	if (err) {
-		pr_err("%s: __of_changeset_apply() failed for tree@%s\n",
-				__func__, tree->full_name);
+	if (err)
 		goto err_revert_overlay;
-	}
+
 
 	/* add to the tail of the overlay list */
 	list_add_tail(&ov->node, &ov_list);
@@ -469,8 +462,7 @@ static int overlay_removal_is_ok(struct of_overlay *ov)
 
 	list_for_each_entry(ce, &ov->cset.entries, node) {
 		if (!overlay_is_topmost(ov, ce->np)) {
-			pr_err("%s: overlay #%d is not topmost\n",
-					__func__, ov->id);
+			pr_err("overlay #%d is not topmost\n", ov->id);
 			return 0;
 		}
 	}
@@ -496,16 +488,13 @@ int of_overlay_destroy(int id)
 	ov = idr_find(&ov_idr, id);
 	if (ov == NULL) {
 		err = -ENODEV;
-		pr_err("%s: Could not find overlay #%d\n",
-				__func__, id);
+		pr_err("destroy: Could not find overlay #%d\n", id);
 		goto out;
 	}
 
 	/* check whether the overlay is safe to remove */
 	if (!overlay_removal_is_ok(ov)) {
 		err = -EBUSY;
-		pr_err("%s: removal check failed for overlay #%d\n",
-				__func__, id);
 		goto out;
 	}
 
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 16e8daffa..f39ccd5aa 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -11,6 +11,9 @@
  *  2 of the License, or (at your option) any later version.
  *
  */
+
+#define pr_fmt(fmt)	"OF: " fmt
+
 #include <linux/errno.h>
 #include <linux/module.h>
 #include <linux/amba/bus.h>
@@ -31,7 +34,6 @@ const struct of_device_id of_default_bus_match_table[] = {
 #endif /* CONFIG_ARM_AMBA */
 	{} /* Empty terminated list */
 };
-EXPORT_SYMBOL(of_default_bus_match_table);
 
 static int of_dev_node_match(struct device *dev, void *data)
 {
@@ -234,11 +236,8 @@ static struct amba_device *of_amba_device_create(struct device_node *node,
 		return NULL;
 
 	dev = amba_device_alloc(NULL, 0, 0);
-	if (!dev) {
-		pr_err("%s(): amba_device_alloc() failed for %s\n",
-		       __func__, node->full_name);
+	if (!dev)
 		goto err_clear_flag;
-	}
 
 	/* setup generic device info */
 	dev->dev.of_node = of_node_get(node);
@@ -261,15 +260,15 @@ static struct amba_device *of_amba_device_create(struct device_node *node,
 
 	ret = of_address_to_resource(node, 0, &dev->res);
 	if (ret) {
-		pr_err("%s(): of_address_to_resource() failed (%d) for %s\n",
-		       __func__, ret, node->full_name);
+		pr_err("amba: of_address_to_resource() failed (%d) for %s\n",
+		       ret, node->full_name);
 		goto err_free;
 	}
 
 	ret = amba_device_add(dev, &iomem_resource);
 	if (ret) {
-		pr_err("%s(): amba_device_add() failed (%d) for %s\n",
-		       __func__, ret, node->full_name);
+		pr_err("amba_device_add() failed (%d) for %s\n",
+		       ret, node->full_name);
 		goto err_free;
 	}
 
@@ -363,6 +362,12 @@ static int of_platform_bus_create(struct device_node *bus,
 		return 0;
 	}
 
+	if (of_node_check_flag(bus, OF_POPULATED_BUS)) {
+		pr_debug("%s() - skipping %s, already populated\n",
+			__func__, bus->full_name);
+		return 0;
+	}
+
 	auxdata = of_dev_lookup(lookup, bus);
 	if (auxdata) {
 		bus_id = auxdata->name;
@@ -414,7 +419,7 @@ int of_platform_bus_probe(struct device_node *root,
 	if (!root)
 		return -EINVAL;
 
-	pr_debug("of_platform_bus_probe()\n");
+	pr_debug("%s()\n", __func__);
 	pr_debug(" starting at: %s\n", root->full_name);
 
 	/* Do a self check of bus type, if there's a match, create children */
@@ -466,6 +471,9 @@ int of_platform_populate(struct device_node *root,
 	if (!root)
 		return -EINVAL;
 
+	pr_debug("%s()\n", __func__);
+	pr_debug(" starting at: %s\n", root->full_name);
+
 	for_each_child_of_node(root, child) {
 		rc = of_platform_bus_create(child, matches, lookup, parent, true);
 		if (rc) {
@@ -489,6 +497,33 @@ int of_platform_default_populate(struct device_node *root,
 }
 EXPORT_SYMBOL_GPL(of_platform_default_populate);
 
+#ifndef CONFIG_PPC
+static int __init of_platform_default_populate_init(void)
+{
+	struct device_node *node;
+
+	if (!of_have_populated_dt())
+		return -ENODEV;
+
+	/*
+	 * Handle ramoops explicitly, since it is inside /reserved-memory,
+	 * which lacks a "compatible" property.
+	 */
+	node = of_find_node_by_path("/reserved-memory");
+	if (node) {
+		node = of_find_compatible_node(node, NULL, "ramoops");
+		if (node)
+			of_platform_device_create(node, NULL, NULL);
+	}
+
+	/* Populate everything else. */
+	of_platform_default_populate(NULL, NULL, NULL);
+
+	return 0;
+}
+arch_initcall_sync(of_platform_default_populate_init);
+#endif
+
 static int of_platform_device_destroy(struct device *dev, void *data)
 {
 	/* Do not touch devices not populated from the device tree */
diff --git a/drivers/of/resolver.c b/drivers/of/resolver.c
index d313d492f..46325d639 100644
--- a/drivers/of/resolver.c
+++ b/drivers/of/resolver.c
@@ -9,6 +9,8 @@
  * version 2 as published by the Free Software Foundation.
  */
 
+#define pr_fmt(fmt)	"OF: resolver: " fmt
+
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of.h>
@@ -313,6 +315,11 @@ int of_resolve_phandles(struct device_node *resolve)
 	phandle phandle, phandle_delta;
 	int err;
 
+	if (!resolve)
+		pr_err("%s: null node\n", __func__);
+	if (resolve && !of_node_check_flag(resolve, OF_DETACHED))
+		pr_err("%s: node %s not detached\n", __func__,
+			 resolve->full_name);
 	/* the resolve node must exist, and be detached */
 	if (!resolve || !of_node_check_flag(resolve, OF_DETACHED))
 		return -EINVAL;
@@ -369,6 +376,7 @@ int of_resolve_phandles(struct device_node *resolve)
 
 	/* we need to fixup, but no root symbols... */
 	if (!root_sym) {
+		pr_err("%s: no symbols in root of device tree.\n", __func__);
 		err = -EINVAL;
 		goto out;
 	}
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index f34ed9310..53c83d66e 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -771,7 +771,7 @@ static void __init of_unittest_platform_populate(void)
 	};
 
 	np = of_find_node_by_path("/testcase-data");
-	of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
+	of_platform_default_populate(np, NULL, NULL);
 
 	/* Test that a missing irq domain returns -EPROBE_DEFER */
 	np = of_find_node_by_path("/testcase-data/testcase-device1");
@@ -1871,8 +1871,7 @@ static void __init of_unittest_overlay(void)
 		goto out;
 	}
 
-	ret = of_platform_populate(bus_np, of_default_bus_match_table,
-			NULL, NULL);
+	ret = of_platform_default_populate(bus_np, NULL, NULL);
 	if (ret != 0) {
 		unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
 		goto out;