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-rw-r--r--arch/microblaze/include/asm/prom.h4
-rw-r--r--arch/microblaze/kernel/prom.c59
-rw-r--r--arch/powerpc/include/asm/prom.h4
-rw-r--r--arch/powerpc/kernel/prom.c59
-rw-r--r--drivers/of/Kconfig4
-rw-r--r--drivers/of/base.c71
-rw-r--r--include/linux/of.h6
7 files changed, 81 insertions, 126 deletions
diff --git a/arch/microblaze/include/asm/prom.h b/arch/microblaze/include/asm/prom.h
index 07d1063f9aa..6c6b386cf3c 100644
--- a/arch/microblaze/include/asm/prom.h
+++ b/arch/microblaze/include/asm/prom.h
@@ -39,10 +39,6 @@ extern struct device_node *of_chosen;
extern rwlock_t devtree_lock; /* temporary while merging */
-/* For updating the device tree at runtime */
-extern void of_attach_node(struct device_node *);
-extern void of_detach_node(struct device_node *);
-
/* Other Prototypes */
extern int early_uartlite_console(void);
diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c
index cd158ef5b58..8171282a0b0 100644
--- a/arch/microblaze/kernel/prom.c
+++ b/arch/microblaze/kernel/prom.c
@@ -197,65 +197,6 @@ struct device_node *of_find_node_by_phandle(phandle handle)
}
EXPORT_SYMBOL(of_find_node_by_phandle);
-/*
- * Plug a device node into the tree and global list.
- */
-void of_attach_node(struct device_node *np)
-{
- unsigned long flags;
-
- write_lock_irqsave(&devtree_lock, flags);
- np->sibling = np->parent->child;
- np->allnext = allnodes;
- np->parent->child = np;
- allnodes = np;
- write_unlock_irqrestore(&devtree_lock, flags);
-}
-
-/*
- * "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)
-{
- struct device_node *parent;
- unsigned long flags;
-
- write_lock_irqsave(&devtree_lock, flags);
-
- parent = np->parent;
- if (!parent)
- goto out_unlock;
-
- if (allnodes == np)
- allnodes = np->allnext;
- else {
- struct device_node *prev;
- for (prev = allnodes;
- prev->allnext != np;
- prev = prev->allnext)
- ;
- prev->allnext = np->allnext;
- }
-
- if (parent->child == np)
- parent->child = np->sibling;
- else {
- struct device_node *prevsib;
- for (prevsib = np->parent->child;
- prevsib->sibling != np;
- prevsib = prevsib->sibling)
- ;
- prevsib->sibling = np->sibling;
- }
-
- of_node_set_flag(np, OF_DETACHED);
-
-out_unlock:
- write_unlock_irqrestore(&devtree_lock, flags);
-}
-
#if defined(CONFIG_DEBUG_FS) && defined(DEBUG)
static struct debugfs_blob_wrapper flat_dt_blob;
diff --git a/arch/powerpc/include/asm/prom.h b/arch/powerpc/include/asm/prom.h
index 2ab9cbd9882..f384db815ea 100644
--- a/arch/powerpc/include/asm/prom.h
+++ b/arch/powerpc/include/asm/prom.h
@@ -34,10 +34,6 @@ extern struct device_node *of_chosen;
#define HAVE_ARCH_DEVTREE_FIXUPS
-/* For updating the device tree at runtime */
-extern void of_attach_node(struct device_node *);
-extern void of_detach_node(struct device_node *);
-
#ifdef CONFIG_PPC32
/*
* PCI <-> OF matching functions
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 1ed2ec2ea05..f954c718d7e 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -817,65 +817,6 @@ struct device_node *of_find_next_cache_node(struct device_node *np)
return NULL;
}
-/*
- * Plug a device node into the tree and global list.
- */
-void of_attach_node(struct device_node *np)
-{
- unsigned long flags;
-
- write_lock_irqsave(&devtree_lock, flags);
- np->sibling = np->parent->child;
- np->allnext = allnodes;
- np->parent->child = np;
- allnodes = np;
- write_unlock_irqrestore(&devtree_lock, flags);
-}
-
-/*
- * "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)
-{
- struct device_node *parent;
- unsigned long flags;
-
- write_lock_irqsave(&devtree_lock, flags);
-
- parent = np->parent;
- if (!parent)
- goto out_unlock;
-
- if (allnodes == np)
- allnodes = np->allnext;
- else {
- struct device_node *prev;
- for (prev = allnodes;
- prev->allnext != np;
- prev = prev->allnext)
- ;
- prev->allnext = np->allnext;
- }
-
- if (parent->child == np)
- parent->child = np->sibling;
- else {
- struct device_node *prevsib;
- for (prevsib = np->parent->child;
- prevsib->sibling != np;
- prevsib = prevsib->sibling)
- ;
- prevsib->sibling = np->sibling;
- }
-
- of_node_set_flag(np, OF_DETACHED);
-
-out_unlock:
- write_unlock_irqrestore(&devtree_lock, flags);
-}
-
#ifdef CONFIG_PPC_PSERIES
/*
* Fix up the uninitialized fields in a new device node:
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index 462825e0312..7cecc8fea9b 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -2,6 +2,10 @@ config OF_FLATTREE
bool
depends on OF
+config OF_DYNAMIC
+ def_bool y
+ depends on OF && PPC_OF
+
config OF_DEVICE
def_bool y
depends on OF && (SPARC || PPC_OF || MICROBLAZE)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index cf89ee6253f..2ce58be314a 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -870,3 +870,74 @@ int prom_update_property(struct device_node *np,
return 0;
}
+
+#if defined(CONFIG_OF_DYNAMIC)
+/*
+ * Support for dynamic device trees.
+ *
+ * On some platforms, the device tree can be manipulated at runtime.
+ * The routines in this section support adding, removing and changing
+ * device tree nodes.
+ */
+
+/**
+ * of_attach_node - Plug a device node into the tree and global list.
+ */
+void of_attach_node(struct device_node *np)
+{
+ unsigned long flags;
+
+ write_lock_irqsave(&devtree_lock, flags);
+ np->sibling = np->parent->child;
+ np->allnext = allnodes;
+ np->parent->child = np;
+ allnodes = np;
+ write_unlock_irqrestore(&devtree_lock, flags);
+}
+
+/**
+ * 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)
+{
+ struct device_node *parent;
+ unsigned long flags;
+
+ write_lock_irqsave(&devtree_lock, flags);
+
+ parent = np->parent;
+ if (!parent)
+ goto out_unlock;
+
+ if (allnodes == np)
+ allnodes = np->allnext;
+ else {
+ struct device_node *prev;
+ for (prev = allnodes;
+ prev->allnext != np;
+ prev = prev->allnext)
+ ;
+ prev->allnext = np->allnext;
+ }
+
+ if (parent->child == np)
+ parent->child = np->sibling;
+ else {
+ struct device_node *prevsib;
+ for (prevsib = np->parent->child;
+ prevsib->sibling != np;
+ prevsib = prevsib->sibling)
+ ;
+ prevsib->sibling = np->sibling;
+ }
+
+ of_node_set_flag(np, OF_DETACHED);
+
+out_unlock:
+ write_unlock_irqrestore(&devtree_lock, flags);
+}
+#endif /* defined(CONFIG_OF_DYNAMIC) */
+
diff --git a/include/linux/of.h b/include/linux/of.h
index dbabf86e0b7..3cc0d7ae290 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -184,4 +184,10 @@ extern int of_parse_phandles_with_args(struct device_node *np,
const char *list_name, const char *cells_name, int index,
struct device_node **out_node, const void **out_args);
+#if defined(CONFIG_OF_DYNAMIC)
+/* For updating the device tree at runtime */
+extern void of_attach_node(struct device_node *);
+extern void of_detach_node(struct device_node *);
+#endif
+
#endif /* _LINUX_OF_H */
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-25 10:24:34 +0000