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-rw-r--r--arch/sparc/kernel/prom.c53
-rw-r--r--arch/sparc64/kernel/prom.c53
-rw-r--r--include/asm-sparc/prom.h8
-rw-r--r--include/asm-sparc64/prom.h8
4 files changed, 122 insertions, 0 deletions
diff --git a/arch/sparc/kernel/prom.c b/arch/sparc/kernel/prom.c
index 63b2b9bd778e..f3f53f2e0e1e 100644
--- a/arch/sparc/kernel/prom.c
+++ b/arch/sparc/kernel/prom.c
@@ -27,6 +27,11 @@
static struct device_node *allnodes;
+/* use when traversing tree through the allnext, child, sibling,
+ * or parent members of struct device_node.
+ */
+static DEFINE_RWLOCK(devtree_lock);
+
int of_device_is_compatible(struct device_node *device, const char *compat)
{
const char* cp;
@@ -185,6 +190,54 @@ int of_getintprop_default(struct device_node *np, const char *name, int def)
}
EXPORT_SYMBOL(of_getintprop_default);
+int of_set_property(struct device_node *dp, const char *name, void *val, int len)
+{
+ struct property **prevp;
+ void *new_val;
+ int err;
+
+ new_val = kmalloc(len, GFP_KERNEL);
+ if (!new_val)
+ return -ENOMEM;
+
+ memcpy(new_val, val, len);
+
+ err = -ENODEV;
+
+ write_lock(&devtree_lock);
+ prevp = &dp->properties;
+ while (*prevp) {
+ struct property *prop = *prevp;
+
+ if (!strcmp(prop->name, name)) {
+ void *old_val = prop->value;
+ int ret;
+
+ ret = prom_setprop(dp->node, name, val, len);
+ err = -EINVAL;
+ if (ret >= 0) {
+ prop->value = new_val;
+ prop->length = len;
+
+ if (OF_IS_DYNAMIC(prop))
+ kfree(old_val);
+
+ OF_MARK_DYNAMIC(prop);
+
+ err = 0;
+ }
+ break;
+ }
+ prevp = &(*prevp)->next;
+ }
+ write_unlock(&devtree_lock);
+
+ /* XXX Upate procfs if necessary... */
+
+ return err;
+}
+EXPORT_SYMBOL(of_set_property);
+
static unsigned int prom_early_allocated;
static void * __init prom_early_alloc(unsigned long size)
diff --git a/arch/sparc64/kernel/prom.c b/arch/sparc64/kernel/prom.c
index e9d703eea806..c62fd3e7a0f8 100644
--- a/arch/sparc64/kernel/prom.c
+++ b/arch/sparc64/kernel/prom.c
@@ -27,6 +27,11 @@
static struct device_node *allnodes;
+/* use when traversing tree through the allnext, child, sibling,
+ * or parent members of struct device_node.
+ */
+static DEFINE_RWLOCK(devtree_lock);
+
int of_device_is_compatible(struct device_node *device, const char *compat)
{
const char* cp;
@@ -185,6 +190,54 @@ int of_getintprop_default(struct device_node *np, const char *name, int def)
}
EXPORT_SYMBOL(of_getintprop_default);
+int of_set_property(struct device_node *dp, const char *name, void *val, int len)
+{
+ struct property **prevp;
+ void *new_val;
+ int err;
+
+ new_val = kmalloc(len, GFP_KERNEL);
+ if (!new_val)
+ return -ENOMEM;
+
+ memcpy(new_val, val, len);
+
+ err = -ENODEV;
+
+ write_lock(&devtree_lock);
+ prevp = &dp->properties;
+ while (*prevp) {
+ struct property *prop = *prevp;
+
+ if (!strcmp(prop->name, name)) {
+ void *old_val = prop->value;
+ int ret;
+
+ ret = prom_setprop(dp->node, name, val, len);
+ err = -EINVAL;
+ if (ret >= 0) {
+ prop->value = new_val;
+ prop->length = len;
+
+ if (OF_IS_DYNAMIC(prop))
+ kfree(old_val);
+
+ OF_MARK_DYNAMIC(prop);
+
+ err = 0;
+ }
+ break;
+ }
+ prevp = &(*prevp)->next;
+ }
+ write_unlock(&devtree_lock);
+
+ /* XXX Upate procfs if necessary... */
+
+ return err;
+}
+EXPORT_SYMBOL(of_set_property);
+
static unsigned int prom_early_allocated;
static void * __init prom_early_alloc(unsigned long size)
diff --git a/include/asm-sparc/prom.h b/include/asm-sparc/prom.h
index c5e3d26eabd3..e9b8047470fe 100644
--- a/include/asm-sparc/prom.h
+++ b/include/asm-sparc/prom.h
@@ -35,6 +35,7 @@ struct property {
int length;
void *value;
struct property *next;
+ unsigned long _flags;
};
struct device_node {
@@ -60,6 +61,12 @@ struct device_node {
void *data;
};
+/* flag descriptions */
+#define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
+
+#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
+#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
+
static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de)
{
dn->pde = de;
@@ -88,6 +95,7 @@ extern struct property *of_find_property(struct device_node *np,
extern int of_device_is_compatible(struct device_node *device, const char *);
extern void *of_get_property(struct device_node *node, const char *name,
int *lenp);
+extern int of_set_property(struct device_node *node, const char *name, void *val, int len);
extern int of_getintprop_default(struct device_node *np,
const char *name,
int def);
diff --git a/include/asm-sparc64/prom.h b/include/asm-sparc64/prom.h
index 6d1556c0c263..c8022a337380 100644
--- a/include/asm-sparc64/prom.h
+++ b/include/asm-sparc64/prom.h
@@ -35,6 +35,7 @@ struct property {
int length;
void *value;
struct property *next;
+ unsigned long _flags;
};
struct device_node {
@@ -60,6 +61,12 @@ struct device_node {
void *data;
};
+/* flag descriptions */
+#define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
+
+#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
+#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
+
static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de)
{
dn->pde = de;
@@ -88,6 +95,7 @@ extern struct property *of_find_property(struct device_node *np,
extern int of_device_is_compatible(struct device_node *device, const char *);
extern void *of_get_property(struct device_node *node, const char *name,
int *lenp);
+extern int of_set_property(struct device_node *node, const char *name, void *val, int len);
extern int of_getintprop_default(struct device_node *np,
const char *name,
int def);