fs/proc/proc_devtree.c

2  * proc_devtree.c - handles /proc/device-tree
24 	np->pde = de;  in set_node_proc_entry()
31  * Supply data on a read from /proc/device-tree/node/property.
35 	struct property *pp = m->private;  in property_proc_show()
37 	seq_write(m, pp->value, pp->length);  in property_proc_show()
43 	return single_open(file, property_proc_show, PDE(inode)->data);  in property_proc_open()
55  * For a node with a name like "gc@10", we make symlinks called "gc"
60  * Add a property to a node
63 __proc_device_tree_add_prop(struct proc_dir_entry *de, struct property *pp,  in __proc_device_tree_add_prop()
73 			       strncmp(name, "security-", 9) ? S_IRUGO : S_IRUSR,  in __proc_device_tree_add_prop()
78 	if (!strncmp(name, "security-", 9))  in __proc_device_tree_add_prop()
79 		ent->size = 0; /* don't leak number of password chars */  in __proc_device_tree_add_prop()
81 		ent->size = pp->length;  in __proc_device_tree_add_prop()
87 void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop)  in proc_device_tree_add_prop()
89 	__proc_device_tree_add_prop(pde, prop, prop->name);  in proc_device_tree_add_prop()
93 				  struct property *prop)  in proc_device_tree_remove_prop()
95 	remove_proc_entry(prop->name, pde);  in proc_device_tree_remove_prop()
99 				  struct property *newprop,  in proc_device_tree_update_prop()
100 				  struct property *oldprop)  in proc_device_tree_update_prop()
104 	for (ent = pde->subdir; ent != NULL; ent = ent->next)  in proc_device_tree_update_prop()
105 		if (ent->data == oldprop)  in proc_device_tree_update_prop()
108 		printk(KERN_WARNING "device-tree: property \"%s\" "  in proc_device_tree_update_prop()
109 		       " does not exist\n", oldprop->name);  in proc_device_tree_update_prop()
111 		ent->data = newprop;  in proc_device_tree_update_prop()
112 		ent->size = newprop->length;  in proc_device_tree_update_prop()
129 	for (ent = de->subdir; ent != NULL; ent = ent->next) {  in duplicate_name()
130 		if (strcmp(ent->name, name) == 0) {  in duplicate_name()
151 		printk(KERN_ERR "device-tree: Out of memory trying to fixup "  in fixup_name()
168 		/* Multiple duplicates. Retry with a different offset. */  in fixup_name()
173 	printk(KERN_WARNING "device-tree: Duplicate name in %s, "  in fixup_name()
174 			"renamed to \"%s\"\n", np->full_name, fixed_name);  in fixup_name()
180  * Process a node, adding entries for its children and its properties.
185 	struct property *pp;  in proc_device_tree_add_node()
187 	struct device_node *child;  in proc_device_tree_add_node()  local
191 	for (child = NULL; (child = of_get_next_child(np, child));) {  in proc_device_tree_add_node()
193 		p = strrchr(child->full_name, '/');  in proc_device_tree_add_node()
195 			p = child->full_name;  in proc_device_tree_add_node()
205 		proc_device_tree_add_node(child, ent);  in proc_device_tree_add_node()
207 	of_node_put(child);  in proc_device_tree_add_node()
209 	for (pp = np->properties; pp != NULL; pp = pp->next) {  in proc_device_tree_add_node()
210 		p = pp->name;  in proc_device_tree_add_node()
225  * Called on initialization to set up the /proc/device-tree subtree
231 	proc_device_tree = proc_mkdir("device-tree", NULL);  in proc_device_tree_init()
236 		pr_debug("/proc/device-tree: can't find root\n");  in proc_device_tree_init()