1 files changed, 121 insertions, 0 deletions

diff --git a/arch/sparc/kernel/prom_common.c b/arch/sparc/kernel/prom_common.c
new file mode 100644
index 00000000000..ded8c628811
--- /dev/null
+++ b/arch/sparc/kernel/prom_common.c
@@ -0,0 +1,121 @@
+/* prom_common.c: OF device tree support common code.
+ *
+ * Paul Mackerras       August 1996.
+ * Copyright (C) 1996-2005 Paul Mackerras.
+ *
+ *  Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
+ *    {engebret|bergner}@us.ibm.com
+ *
+ *  Adapted for sparc by David S. Miller davem@davemloft.net
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <asm/prom.h>
+#include <asm/oplib.h>
+
+#include "prom.h"
+
+struct device_node *of_find_node_by_phandle(phandle handle)
+{
+        struct device_node *np;
+
+        for (np = allnodes; np; np = np->allnext)
+                if (np->node == handle)
+                        break;
+
+        return np;
+}
+EXPORT_SYMBOL(of_find_node_by_phandle);
+
+int of_getintprop_default(struct device_node *np, const char *name, int def)
+{
+        struct property *prop;
+        int len;
+
+        prop = of_find_property(np, name, &len);
+        if (!prop || len != 4)
+                return def;
+
+        return *(int *) prop->value;
+}
+EXPORT_SYMBOL(of_getintprop_default);
+
+DEFINE_MUTEX(of_set_property_mutex);
+EXPORT_SYMBOL(of_set_property_mutex);
+
+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 (!strcasecmp(prop->name, name)) {
+                        void *old_val = prop->value;
+                        int ret;
+
+                        mutex_lock(&of_set_property_mutex);
+                        ret = prom_setprop(dp->node, name, val, len);
+                        mutex_unlock(&of_set_property_mutex);
+
+                        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);
+
+int of_find_in_proplist(const char *list, const char *match, int len)
+{
+        while (len > 0) {
+                int l;
+
+                if (!strcmp(list, match))
+                        return 1;
+                l = strlen(list) + 1;
+                list += l;
+                len -= l;
+        }
+        return 0;
+}
+EXPORT_SYMBOL(of_find_in_proplist);
+