Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

Pull powerpc update from Benjamin Herrenschmidt:
 "The main highlight is probably some base POWER8 support.  There's more
  to come such as transactional memory support but that will wait for
  the next one.

  Overall it's pretty quiet, or rather I've been pretty poor at picking
  things up from patchwork and reviewing them this time around and Kumar
  no better on the FSL side it seems..."

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (73 commits)
  powerpc+of: Rename and fix OF reconfig notifier error inject module
  powerpc: mpc5200: Add a3m071 board support
  powerpc/512x: don't compile any platform DIU code if the DIU is not enabled
  powerpc/mpc52xx: use module_platform_driver macro
  powerpc+of: Export of_reconfig_notifier_[register,unregister]
  powerpc/dma/raidengine: add raidengine device
  powerpc/iommu/fsl: Add PAMU bypass enable register to ccsr_guts struct
  powerpc/mpc85xx: Change spin table to cached memory
  powerpc/fsl-pci: Add PCI controller ATMU PM support
  powerpc/86xx: fsl_pcibios_fixup_bus requires CONFIG_PCI
  drivers/virt: the Freescale hypervisor driver doesn't need to check MSR[GS]
  powerpc/85xx: p1022ds: Use NULL instead of 0 for pointers
  powerpc: Disable relocation on exceptions when kexecing
  powerpc: Enable relocation on during exceptions at boot
  powerpc: Move get_longbusy_msecs into hvcall.h and remove duplicate function
  powerpc: Add wrappers to enable/disable relocation on exceptions
  powerpc: Add set_mode hcall
  powerpc: Setup relocation on exceptions for bare metal systems
  powerpc: Move initial mfspr LPCR out of __init_LPCR
  powerpc: Add relocation on exception vector handlers
  ...

1 files changed, 127 insertions, 15 deletions

diff --git a/drivers/of/base.c b/drivers/of/base.c
index be84640..db8d211 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1114,13 +1114,36 @@ int of_parse_phandle_with_args(const struct device_node *np, const char *list_na
 }
 EXPORT_SYMBOL(of_parse_phandle_with_args);
 
+#if defined(CONFIG_OF_DYNAMIC)
+static int of_property_notify(int action, struct device_node *np,
+			      struct property *prop)
+{
+	struct of_prop_reconfig pr;
+
+	pr.dn = np;
+	pr.prop = prop;
+	return of_reconfig_notify(action, &pr);
+}
+#else
+static int of_property_notify(int action, struct device_node *np,
+			      struct property *prop)
+{
+	return 0;
+}
+#endif
+
 /**
- * prom_add_property - Add a property to a node
+ * of_add_property - Add a property to a node
  */
-int prom_add_property(struct device_node *np, struct property *prop)
+int of_add_property(struct device_node *np, struct property *prop)
 {
 	struct property **next;
 	unsigned long flags;
+	int rc;
+
+	rc = of_property_notify(OF_RECONFIG_ADD_PROPERTY, np, prop);
+	if (rc)
+		return rc;
 
 	prop->next = NULL;
 	write_lock_irqsave(&devtree_lock, flags);
@@ -1146,18 +1169,23 @@ int prom_add_property(struct device_node *np, struct property *prop)
 }
 
 /**
- * prom_remove_property - Remove a property from a node.
+ * of_remove_property - Remove a property from a node.
  *
  * Note that we don't actually remove it, since we have given out
  * who-knows-how-many pointers to the data using get-property.
  * Instead we just move the property to the "dead properties"
  * list, so it won't be found any more.
  */
-int prom_remove_property(struct device_node *np, struct property *prop)
+int of_remove_property(struct device_node *np, struct property *prop)
 {
 	struct property **next;
 	unsigned long flags;
 	int found = 0;
+	int rc;
+
+	rc = of_property_notify(OF_RECONFIG_REMOVE_PROPERTY, np, prop);
+	if (rc)
+		return rc;
 
 	write_lock_irqsave(&devtree_lock, flags);
 	next = &np->properties;
@@ -1187,7 +1215,7 @@ int prom_remove_property(struct device_node *np, struct property *prop)
 }
 
 /*
- * prom_update_property - Update a property in a node, if the property does
+ * of_update_property - Update a property in a node, if the property does
  * not exist, add it.
  *
  * Note that we don't actually remove it, since we have given out
@@ -1195,19 +1223,22 @@ int prom_remove_property(struct device_node *np, struct property *prop)
  * Instead we just move the property to the "dead properties" list,
  * and add the new property to the property list
  */
-int prom_update_property(struct device_node *np,
-			 struct property *newprop)
+int of_update_property(struct device_node *np, struct property *newprop)
 {
 	struct property **next, *oldprop;
 	unsigned long flags;
-	int found = 0;
+	int rc, found = 0;
+
+	rc = of_property_notify(OF_RECONFIG_UPDATE_PROPERTY, np, newprop);
+	if (rc)
+		return rc;
 
 	if (!newprop->name)
 		return -EINVAL;
 
 	oldprop = of_find_property(np, newprop->name, NULL);
 	if (!oldprop)
-		return prom_add_property(np, newprop);
+		return of_add_property(np, newprop);
 
 	write_lock_irqsave(&devtree_lock, flags);
 	next = &np->properties;
@@ -1246,12 +1277,55 @@ int prom_update_property(struct device_node *np,
  * device tree nodes.
  */
 
+static BLOCKING_NOTIFIER_HEAD(of_reconfig_chain);
+
+int of_reconfig_notifier_register(struct notifier_block *nb)
+{
+	return blocking_notifier_chain_register(&of_reconfig_chain, nb);
+}
+EXPORT_SYMBOL_GPL(of_reconfig_notifier_register);
+
+int of_reconfig_notifier_unregister(struct notifier_block *nb)
+{
+	return blocking_notifier_chain_unregister(&of_reconfig_chain, nb);
+}
+EXPORT_SYMBOL_GPL(of_reconfig_notifier_unregister);
+
+int of_reconfig_notify(unsigned long action, void *p)
+{
+	int rc;
+
+	rc = blocking_notifier_call_chain(&of_reconfig_chain, action, p);
+	return notifier_to_errno(rc);
+}
+
+#ifdef CONFIG_PROC_DEVICETREE
+static void of_add_proc_dt_entry(struct device_node *dn)
+{
+	struct proc_dir_entry *ent;
+
+	ent = proc_mkdir(strrchr(dn->full_name, '/') + 1, dn->parent->pde);
+	if (ent)
+		proc_device_tree_add_node(dn, ent);
+}
+#else
+static void of_add_proc_dt_entry(struct device_node *dn)
+{
+	return;
+}
+#endif
+
 /**
  * of_attach_node - Plug a device node into the tree and global list.
  */
-void of_attach_node(struct device_node *np)
+int of_attach_node(struct device_node *np)
 {
 	unsigned long flags;
+	int rc;
+
+	rc = of_reconfig_notify(OF_RECONFIG_ATTACH_NODE, np);
+	if (rc)
+		return rc;
 
 	write_lock_irqsave(&devtree_lock, flags);
 	np->sibling = np->parent->child;
@@ -1259,24 +1333,61 @@ void of_attach_node(struct device_node *np)
 	np->parent->child = np;
 	of_allnodes = np;
 	write_unlock_irqrestore(&devtree_lock, flags);
+
+	of_add_proc_dt_entry(np);
+	return 0;
 }
 
+#ifdef CONFIG_PROC_DEVICETREE
+static void of_remove_proc_dt_entry(struct device_node *dn)
+{
+	struct device_node *parent = dn->parent;
+	struct property *prop = dn->properties;
+
+	while (prop) {
+		remove_proc_entry(prop->name, dn->pde);
+		prop = prop->next;
+	}
+
+	if (dn->pde)
+		remove_proc_entry(dn->pde->name, parent->pde);
+}
+#else
+static void of_remove_proc_dt_entry(struct device_node *dn)
+{
+	return;
+}
+#endif
+
 /**
  * of_detach_node - "Unplug" a node from the device tree.
  *
  * The caller must hold a reference to the node.  The memory associated with
  * the node is not freed until its refcount goes to zero.
  */
-void of_detach_node(struct device_node *np)
+int of_detach_node(struct device_node *np)
 {
 	struct device_node *parent;
 	unsigned long flags;
+	int rc = 0;
+
+	rc = of_reconfig_notify(OF_RECONFIG_DETACH_NODE, np);
+	if (rc)
+		return rc;
 
 	write_lock_irqsave(&devtree_lock, flags);
 
+	if (of_node_check_flag(np, OF_DETACHED)) {
+		/* someone already detached it */
+		write_unlock_irqrestore(&devtree_lock, flags);
+		return rc;
+	}
+
 	parent = np->parent;
-	if (!parent)
-		goto out_unlock;
+	if (!parent) {
+		write_unlock_irqrestore(&devtree_lock, flags);
+		return rc;
+	}
 
 	if (of_allnodes == np)
 		of_allnodes = np->allnext;
@@ -1301,9 +1412,10 @@ void of_detach_node(struct device_node *np)
 	}
 
 	of_node_set_flag(np, OF_DETACHED);
-
-out_unlock:
 	write_unlock_irqrestore(&devtree_lock, flags);
+
+	of_remove_proc_dt_entry(np);
+	return rc;
 }
 #endif /* defined(CONFIG_OF_DYNAMIC) */