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sparc: Create common area for OF device layer code.
This is where common code implementations will go as we unify 32-bit and 64-bit OF device tree code. Signed-off-by: David S. Miller <davem@davemloft.net>
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David S. Miller
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Dec 6, 2008
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -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. | ||
| */ | ||
|
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||
| #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> | ||
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| #include "prom.h" | ||
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| struct device_node *of_find_node_by_phandle(phandle handle) | ||
| { | ||
| struct device_node *np; | ||
|
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| for (np = allnodes; np; np = np->allnext) | ||
| if (np->node == handle) | ||
| break; | ||
|
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| return np; | ||
| } | ||
| EXPORT_SYMBOL(of_find_node_by_phandle); | ||
|
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| int of_getintprop_default(struct device_node *np, const char *name, int def) | ||
| { | ||
| struct property *prop; | ||
| int len; | ||
|
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| prop = of_find_property(np, name, &len); | ||
| if (!prop || len != 4) | ||
| return def; | ||
|
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| return *(int *) prop->value; | ||
| } | ||
| EXPORT_SYMBOL(of_getintprop_default); | ||
|
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| DEFINE_MUTEX(of_set_property_mutex); | ||
| EXPORT_SYMBOL(of_set_property_mutex); | ||
|
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| int of_set_property(struct device_node *dp, const char *name, void *val, int len) | ||
| { | ||
| struct property **prevp; | ||
| void *new_val; | ||
| int err; | ||
|
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| new_val = kmalloc(len, GFP_KERNEL); | ||
| if (!new_val) | ||
| return -ENOMEM; | ||
|
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| memcpy(new_val, val, len); | ||
|
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| err = -ENODEV; | ||
|
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| write_lock(&devtree_lock); | ||
| prevp = &dp->properties; | ||
| while (*prevp) { | ||
| struct property *prop = *prevp; | ||
|
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| if (!strcasecmp(prop->name, name)) { | ||
| void *old_val = prop->value; | ||
| int ret; | ||
|
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| mutex_lock(&of_set_property_mutex); | ||
| ret = prom_setprop(dp->node, name, val, len); | ||
| mutex_unlock(&of_set_property_mutex); | ||
|
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| err = -EINVAL; | ||
| if (ret >= 0) { | ||
| prop->value = new_val; | ||
| prop->length = len; | ||
|
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| if (OF_IS_DYNAMIC(prop)) | ||
| kfree(old_val); | ||
|
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| OF_MARK_DYNAMIC(prop); | ||
|
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| err = 0; | ||
| } | ||
| break; | ||
| } | ||
| prevp = &(*prevp)->next; | ||
| } | ||
| write_unlock(&devtree_lock); | ||
|
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| /* XXX Upate procfs if necessary... */ | ||
|
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| return err; | ||
| } | ||
| EXPORT_SYMBOL(of_set_property); | ||
|
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| int of_find_in_proplist(const char *list, const char *match, int len) | ||
| { | ||
| while (len > 0) { | ||
| int l; | ||
|
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||
| if (!strcmp(list, match)) | ||
| return 1; | ||
| l = strlen(list) + 1; | ||
| list += l; | ||
| len -= l; | ||
| } | ||
| return 0; | ||
| } | ||
| EXPORT_SYMBOL(of_find_in_proplist); | ||
|
|