1 /* prom_common.c: OF device tree support common code.
3 * Paul Mackerras August 1996.
4 * Copyright (C) 1996-2005 Paul Mackerras.
6 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
7 * {engebret|bergner}@us.ibm.com
9 * Adapted for sparc by David S. Miller davem@davemloft.net
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
17 #include <linux/kernel.h>
18 #include <linux/export.h>
19 #include <linux/errno.h>
20 #include <linux/mutex.h>
21 #include <linux/slab.h>
23 #include <linux/of_pdt.h>
25 #include <asm/oplib.h>
30 struct device_node
*of_console_device
;
31 EXPORT_SYMBOL(of_console_device
);
33 char *of_console_path
;
34 EXPORT_SYMBOL(of_console_path
);
36 char *of_console_options
;
37 EXPORT_SYMBOL(of_console_options
);
39 int of_getintprop_default(struct device_node
*np
, const char *name
, int def
)
41 struct property
*prop
;
44 prop
= of_find_property(np
, name
, &len
);
45 if (!prop
|| len
!= 4)
48 return *(int *) prop
->value
;
50 EXPORT_SYMBOL(of_getintprop_default
);
52 DEFINE_MUTEX(of_set_property_mutex
);
53 EXPORT_SYMBOL(of_set_property_mutex
);
55 int of_set_property(struct device_node
*dp
, const char *name
, void *val
, int len
)
57 struct property
**prevp
;
61 new_val
= kmalloc(len
, GFP_KERNEL
);
65 memcpy(new_val
, val
, len
);
69 mutex_lock(&of_set_property_mutex
);
70 write_lock(&devtree_lock
);
71 prevp
= &dp
->properties
;
73 struct property
*prop
= *prevp
;
75 if (!strcasecmp(prop
->name
, name
)) {
76 void *old_val
= prop
->value
;
79 ret
= prom_setprop(dp
->phandle
, name
, val
, len
);
83 prop
->value
= new_val
;
86 if (OF_IS_DYNAMIC(prop
))
89 OF_MARK_DYNAMIC(prop
);
95 prevp
= &(*prevp
)->next
;
97 write_unlock(&devtree_lock
);
98 mutex_unlock(&of_set_property_mutex
);
100 /* XXX Upate procfs if necessary... */
104 EXPORT_SYMBOL(of_set_property
);
106 int of_find_in_proplist(const char *list
, const char *match
, int len
)
111 if (!strcmp(list
, match
))
113 l
= strlen(list
) + 1;
119 EXPORT_SYMBOL(of_find_in_proplist
);
122 * SPARC32 and SPARC64's prom_nextprop() do things differently
123 * here, despite sharing the same interface. SPARC32 doesn't fill in 'buf',
124 * returning NULL on an error. SPARC64 fills in 'buf', but sets it to an
125 * empty string upon error.
127 static int __init
handle_nextprop_quirks(char *buf
, const char *name
)
129 if (!name
|| strlen(name
) == 0)
132 #ifdef CONFIG_SPARC32
138 static int __init
prom_common_nextprop(phandle node
, char *prev
, char *buf
)
143 name
= prom_nextprop(node
, prev
, buf
);
144 return handle_nextprop_quirks(buf
, name
);
147 unsigned int prom_early_allocated __initdata
;
149 static struct of_pdt_ops prom_sparc_ops __initdata
= {
150 .nextprop
= prom_common_nextprop
,
151 .getproplen
= prom_getproplen
,
152 .getproperty
= prom_getproperty
,
153 .getchild
= prom_getchild
,
154 .getsibling
= prom_getsibling
,
157 void __init
prom_build_devicetree(void)
159 of_pdt_build_devicetree(prom_root_node
, &prom_sparc_ops
);
162 pr_info("PROM: Built device tree with %u bytes of memory.\n",
163 prom_early_allocated
);