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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-14 11:53:39 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-14 11:53:39 -0400
commitae36e95cf81c98b111b84317adeb358aaffa80e2 (patch)
tree87ef144d3392cca199448117a737c657b7c4663a /drivers/of
parentcc8a44c671fd3a2c792e9e1f59ea1df52697cc8b (diff)
parent663d3f7c2e5e1b018a4c53277ccfde40329d98ca (diff)
Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux
Pull device tree updates from Grant Likely: "The branch contains the following device tree changes the v3.17 merge window: Group changes to the device tree. In preparation for adding device tree overlay support, OF_DYNAMIC is reworked so that a set of device tree changes can be prepared and applied to the tree all at once. OF_RECONFIG notifiers see the most significant change here so that users always get a consistent view of the tree. Notifiers generation is moved from before a change to after it, and notifiers for a group of changes are emitted after the entire block of changes have been applied Automatic console selection from DT. Console drivers can now use of_console_check() to see if the device node is specified as a console device. If so then it gets added as a preferred console. UART devices get this support automatically when uart_add_one_port() is called. DT unit tests no longer depend on pre-loaded data in the device tree. Data is loaded dynamically at the start of unit tests, and then unloaded again when the tests have completed. Also contains a few bugfixes for reserved regions and early memory setup" * tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux: (21 commits) of: Fixing OF Selftest build error drivers: of: add automated assignment of reserved regions to client devices of: Use proper types for checking memory overflow of: typo fix in __of_prop_dup() Adding selftest testdata dynamically into live tree of: Add todo tasklist for Devicetree of: Transactional DT support. of: Reorder device tree changes and notifiers of: Move dynamic node fixups out of powerpc and into common code of: Make sure attached nodes don't carry along extra children of: Make devicetree sysfs update functions consistent. of: Create unlocked versions of node and property add/remove functions OF: Utility helper functions for dynamic nodes of: Move CONFIG_OF_DYNAMIC code into a separate file of: rename of_aliases_mutex to just of_mutex of/platform: Fix of_platform_device_destroy iteration of devices of: Migrate of_find_node_by_name() users to for_each_node_by_name() tty: Update hypervisor tty drivers to use core stdout parsing code. arm/versatile: Add the uart as the stdout device. of: Enable console on serial ports specified by /chosen/stdout-path ...
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/Kconfig3
-rw-r--r--drivers/of/Makefile4
-rw-r--r--drivers/of/base.c451
-rw-r--r--drivers/of/device.c4
-rw-r--r--drivers/of/dynamic.c660
-rw-r--r--drivers/of/fdt.c22
-rw-r--r--drivers/of/of_private.h59
-rw-r--r--drivers/of/of_reserved_mem.c70
-rw-r--r--drivers/of/platform.c32
-rw-r--r--drivers/of/selftest.c235
-rw-r--r--drivers/of/testcase-data/testcases.dts15
-rw-r--r--drivers/of/testcase-data/testcases.dtsi4
12 files changed, 1188 insertions, 371 deletions
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index 2dcb0541012d..5160c4eb73c2 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -9,7 +9,8 @@ menu "Device Tree and Open Firmware support"
9 9
10config OF_SELFTEST 10config OF_SELFTEST
11 bool "Device Tree Runtime self tests" 11 bool "Device Tree Runtime self tests"
12 depends on OF_IRQ 12 depends on OF_IRQ && OF_EARLY_FLATTREE
13 select OF_DYNAMIC
13 help 14 help
14 This option builds in test cases for the device tree infrastructure 15 This option builds in test cases for the device tree infrastructure
15 that are executed once at boot time, and the results dumped to the 16 that are executed once at boot time, and the results dumped to the
diff --git a/drivers/of/Makefile b/drivers/of/Makefile
index 099b1fb00af4..2b6a7b129d10 100644
--- a/drivers/of/Makefile
+++ b/drivers/of/Makefile
@@ -1,11 +1,13 @@
1obj-y = base.o device.o platform.o 1obj-y = base.o device.o platform.o
2obj-$(CONFIG_OF_DYNAMIC) += dynamic.o
2obj-$(CONFIG_OF_FLATTREE) += fdt.o 3obj-$(CONFIG_OF_FLATTREE) += fdt.o
3obj-$(CONFIG_OF_EARLY_FLATTREE) += fdt_address.o 4obj-$(CONFIG_OF_EARLY_FLATTREE) += fdt_address.o
4obj-$(CONFIG_OF_PROMTREE) += pdt.o 5obj-$(CONFIG_OF_PROMTREE) += pdt.o
5obj-$(CONFIG_OF_ADDRESS) += address.o 6obj-$(CONFIG_OF_ADDRESS) += address.o
6obj-$(CONFIG_OF_IRQ) += irq.o 7obj-$(CONFIG_OF_IRQ) += irq.o
7obj-$(CONFIG_OF_NET) += of_net.o 8obj-$(CONFIG_OF_NET) += of_net.o
8obj-$(CONFIG_OF_SELFTEST) += selftest.o 9obj-$(CONFIG_OF_SELFTEST) += of_selftest.o
10of_selftest-objs := selftest.o testcase-data/testcases.dtb.o
9obj-$(CONFIG_OF_MDIO) += of_mdio.o 11obj-$(CONFIG_OF_MDIO) += of_mdio.o
10obj-$(CONFIG_OF_PCI) += of_pci.o 12obj-$(CONFIG_OF_PCI) += of_pci.o
11obj-$(CONFIG_OF_PCI_IRQ) += of_pci_irq.o 13obj-$(CONFIG_OF_PCI_IRQ) += of_pci_irq.o
diff --git a/drivers/of/base.c b/drivers/of/base.c
index b9864806e9b8..d8574adf0d62 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -17,6 +17,7 @@
17 * as published by the Free Software Foundation; either version 17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version. 18 * 2 of the License, or (at your option) any later version.
19 */ 19 */
20#include <linux/console.h>
20#include <linux/ctype.h> 21#include <linux/ctype.h>
21#include <linux/cpu.h> 22#include <linux/cpu.h>
22#include <linux/module.h> 23#include <linux/module.h>
@@ -35,15 +36,17 @@ struct device_node *of_allnodes;
35EXPORT_SYMBOL(of_allnodes); 36EXPORT_SYMBOL(of_allnodes);
36struct device_node *of_chosen; 37struct device_node *of_chosen;
37struct device_node *of_aliases; 38struct device_node *of_aliases;
38static struct device_node *of_stdout; 39struct device_node *of_stdout;
39 40
40static struct kset *of_kset; 41struct kset *of_kset;
41 42
42/* 43/*
43 * Used to protect the of_aliases; but also overloaded to hold off addition of 44 * Used to protect the of_aliases, to hold off addition of nodes to sysfs.
44 * nodes to sysfs 45 * This mutex must be held whenever modifications are being made to the
46 * device tree. The of_{attach,detach}_node() and
47 * of_{add,remove,update}_property() helpers make sure this happens.
45 */ 48 */
46DEFINE_MUTEX(of_aliases_mutex); 49DEFINE_MUTEX(of_mutex);
47 50
48/* use when traversing tree through the allnext, child, sibling, 51/* use when traversing tree through the allnext, child, sibling,
49 * or parent members of struct device_node. 52 * or parent members of struct device_node.
@@ -89,79 +92,7 @@ int __weak of_node_to_nid(struct device_node *np)
89} 92}
90#endif 93#endif
91 94
92#if defined(CONFIG_OF_DYNAMIC) 95#ifndef CONFIG_OF_DYNAMIC
93/**
94 * of_node_get - Increment refcount of a node
95 * @node: Node to inc refcount, NULL is supported to
96 * simplify writing of callers
97 *
98 * Returns node.
99 */
100struct device_node *of_node_get(struct device_node *node)
101{
102 if (node)
103 kobject_get(&node->kobj);
104 return node;
105}
106EXPORT_SYMBOL(of_node_get);
107
108static inline struct device_node *kobj_to_device_node(struct kobject *kobj)
109{
110 return container_of(kobj, struct device_node, kobj);
111}
112
113/**
114 * of_node_release - release a dynamically allocated node
115 * @kref: kref element of the node to be released
116 *
117 * In of_node_put() this function is passed to kref_put()
118 * as the destructor.
119 */
120static void of_node_release(struct kobject *kobj)
121{
122 struct device_node *node = kobj_to_device_node(kobj);
123 struct property *prop = node->properties;
124
125 /* We should never be releasing nodes that haven't been detached. */
126 if (!of_node_check_flag(node, OF_DETACHED)) {
127 pr_err("ERROR: Bad of_node_put() on %s\n", node->full_name);
128 dump_stack();
129 return;
130 }
131
132 if (!of_node_check_flag(node, OF_DYNAMIC))
133 return;
134
135 while (prop) {
136 struct property *next = prop->next;
137 kfree(prop->name);
138 kfree(prop->value);
139 kfree(prop);
140 prop = next;
141
142 if (!prop) {
143 prop = node->deadprops;
144 node->deadprops = NULL;
145 }
146 }
147 kfree(node->full_name);
148 kfree(node->data);
149 kfree(node);
150}
151
152/**
153 * of_node_put - Decrement refcount of a node
154 * @node: Node to dec refcount, NULL is supported to
155 * simplify writing of callers
156 *
157 */
158void of_node_put(struct device_node *node)
159{
160 if (node)
161 kobject_put(&node->kobj);
162}
163EXPORT_SYMBOL(of_node_put);
164#else
165static void of_node_release(struct kobject *kobj) 96static void of_node_release(struct kobject *kobj)
166{ 97{
167 /* Without CONFIG_OF_DYNAMIC, no nodes gets freed */ 98 /* Without CONFIG_OF_DYNAMIC, no nodes gets freed */
@@ -200,13 +131,16 @@ static const char *safe_name(struct kobject *kobj, const char *orig_name)
200 return name; 131 return name;
201} 132}
202 133
203static int __of_add_property_sysfs(struct device_node *np, struct property *pp) 134int __of_add_property_sysfs(struct device_node *np, struct property *pp)
204{ 135{
205 int rc; 136 int rc;
206 137
207 /* Important: Don't leak passwords */ 138 /* Important: Don't leak passwords */
208 bool secure = strncmp(pp->name, "security-", 9) == 0; 139 bool secure = strncmp(pp->name, "security-", 9) == 0;
209 140
141 if (!of_kset || !of_node_is_attached(np))
142 return 0;
143
210 sysfs_bin_attr_init(&pp->attr); 144 sysfs_bin_attr_init(&pp->attr);
211 pp->attr.attr.name = safe_name(&np->kobj, pp->name); 145 pp->attr.attr.name = safe_name(&np->kobj, pp->name);
212 pp->attr.attr.mode = secure ? S_IRUSR : S_IRUGO; 146 pp->attr.attr.mode = secure ? S_IRUSR : S_IRUGO;
@@ -218,12 +152,15 @@ static int __of_add_property_sysfs(struct device_node *np, struct property *pp)
218 return rc; 152 return rc;
219} 153}
220 154
221static int __of_node_add(struct device_node *np) 155int __of_attach_node_sysfs(struct device_node *np)
222{ 156{
223 const char *name; 157 const char *name;
224 struct property *pp; 158 struct property *pp;
225 int rc; 159 int rc;
226 160
161 if (!of_kset)
162 return 0;
163
227 np->kobj.kset = of_kset; 164 np->kobj.kset = of_kset;
228 if (!np->parent) { 165 if (!np->parent) {
229 /* Nodes without parents are new top level trees */ 166 /* Nodes without parents are new top level trees */
@@ -245,59 +182,20 @@ static int __of_node_add(struct device_node *np)
245 return 0; 182 return 0;
246} 183}
247 184
248int of_node_add(struct device_node *np)
249{
250 int rc = 0;
251
252 BUG_ON(!of_node_is_initialized(np));
253
254 /*
255 * Grab the mutex here so that in a race condition between of_init() and
256 * of_node_add(), node addition will still be consistent.
257 */
258 mutex_lock(&of_aliases_mutex);
259 if (of_kset)
260 rc = __of_node_add(np);
261 else
262 /* This scenario may be perfectly valid, but report it anyway */
263 pr_info("of_node_add(%s) before of_init()\n", np->full_name);
264 mutex_unlock(&of_aliases_mutex);
265 return rc;
266}
267
268#if defined(CONFIG_OF_DYNAMIC)
269static void of_node_remove(struct device_node *np)
270{
271 struct property *pp;
272
273 BUG_ON(!of_node_is_initialized(np));
274
275 /* only remove properties if on sysfs */
276 if (of_node_is_attached(np)) {
277 for_each_property_of_node(np, pp)
278 sysfs_remove_bin_file(&np->kobj, &pp->attr);
279 kobject_del(&np->kobj);
280 }
281
282 /* finally remove the kobj_init ref */
283 of_node_put(np);
284}
285#endif
286
287static int __init of_init(void) 185static int __init of_init(void)
288{ 186{
289 struct device_node *np; 187 struct device_node *np;
290 188
291 /* Create the kset, and register existing nodes */ 189 /* Create the kset, and register existing nodes */
292 mutex_lock(&of_aliases_mutex); 190 mutex_lock(&of_mutex);
293 of_kset = kset_create_and_add("devicetree", NULL, firmware_kobj); 191 of_kset = kset_create_and_add("devicetree", NULL, firmware_kobj);
294 if (!of_kset) { 192 if (!of_kset) {
295 mutex_unlock(&of_aliases_mutex); 193 mutex_unlock(&of_mutex);
296 return -ENOMEM; 194 return -ENOMEM;
297 } 195 }
298 for_each_of_allnodes(np) 196 for_each_of_allnodes(np)
299 __of_node_add(np); 197 __of_attach_node_sysfs(np);
300 mutex_unlock(&of_aliases_mutex); 198 mutex_unlock(&of_mutex);
301 199
302 /* Symlink in /proc as required by userspace ABI */ 200 /* Symlink in /proc as required by userspace ABI */
303 if (of_allnodes) 201 if (of_allnodes)
@@ -369,8 +267,8 @@ EXPORT_SYMBOL(of_find_all_nodes);
369 * Find a property with a given name for a given node 267 * Find a property with a given name for a given node
370 * and return the value. 268 * and return the value.
371 */ 269 */
372static const void *__of_get_property(const struct device_node *np, 270const void *__of_get_property(const struct device_node *np,
373 const char *name, int *lenp) 271 const char *name, int *lenp)
374{ 272{
375 struct property *pp = __of_find_property(np, name, lenp); 273 struct property *pp = __of_find_property(np, name, lenp);
376 274
@@ -1748,32 +1646,10 @@ int of_count_phandle_with_args(const struct device_node *np, const char *list_na
1748} 1646}
1749EXPORT_SYMBOL(of_count_phandle_with_args); 1647EXPORT_SYMBOL(of_count_phandle_with_args);
1750 1648
1751#if defined(CONFIG_OF_DYNAMIC)
1752static int of_property_notify(int action, struct device_node *np,
1753 struct property *prop)
1754{
1755 struct of_prop_reconfig pr;
1756
1757 /* only call notifiers if the node is attached */
1758 if (!of_node_is_attached(np))
1759 return 0;
1760
1761 pr.dn = np;
1762 pr.prop = prop;
1763 return of_reconfig_notify(action, &pr);
1764}
1765#else
1766static int of_property_notify(int action, struct device_node *np,
1767 struct property *prop)
1768{
1769 return 0;
1770}
1771#endif
1772
1773/** 1649/**
1774 * __of_add_property - Add a property to a node without lock operations 1650 * __of_add_property - Add a property to a node without lock operations
1775 */ 1651 */
1776static int __of_add_property(struct device_node *np, struct property *prop) 1652int __of_add_property(struct device_node *np, struct property *prop)
1777{ 1653{
1778 struct property **next; 1654 struct property **next;
1779 1655
@@ -1799,22 +1675,49 @@ int of_add_property(struct device_node *np, struct property *prop)
1799 unsigned long flags; 1675 unsigned long flags;
1800 int rc; 1676 int rc;
1801 1677
1802 rc = of_property_notify(OF_RECONFIG_ADD_PROPERTY, np, prop); 1678 mutex_lock(&of_mutex);
1803 if (rc)
1804 return rc;
1805 1679
1806 raw_spin_lock_irqsave(&devtree_lock, flags); 1680 raw_spin_lock_irqsave(&devtree_lock, flags);
1807 rc = __of_add_property(np, prop); 1681 rc = __of_add_property(np, prop);
1808 raw_spin_unlock_irqrestore(&devtree_lock, flags); 1682 raw_spin_unlock_irqrestore(&devtree_lock, flags);
1809 if (rc)
1810 return rc;
1811 1683
1812 if (of_node_is_attached(np)) 1684 if (!rc)
1813 __of_add_property_sysfs(np, prop); 1685 __of_add_property_sysfs(np, prop);
1814 1686
1687 mutex_unlock(&of_mutex);
1688
1689 if (!rc)
1690 of_property_notify(OF_RECONFIG_ADD_PROPERTY, np, prop, NULL);
1691
1815 return rc; 1692 return rc;
1816} 1693}
1817 1694
1695int __of_remove_property(struct device_node *np, struct property *prop)
1696{
1697 struct property **next;
1698
1699 for (next = &np->properties; *next; next = &(*next)->next) {
1700 if (*next == prop)
1701 break;
1702 }
1703 if (*next == NULL)
1704 return -ENODEV;
1705
1706 /* found the node */
1707 *next = prop->next;
1708 prop->next = np->deadprops;
1709 np->deadprops = prop;
1710
1711 return 0;
1712}
1713
1714void __of_remove_property_sysfs(struct device_node *np, struct property *prop)
1715{
1716 /* at early boot, bail here and defer setup to of_init() */
1717 if (of_kset && of_node_is_attached(np))
1718 sysfs_remove_bin_file(&np->kobj, &prop->attr);
1719}
1720
1818/** 1721/**
1819 * of_remove_property - Remove a property from a node. 1722 * of_remove_property - Remove a property from a node.
1820 * 1723 *
@@ -1825,211 +1728,98 @@ int of_add_property(struct device_node *np, struct property *prop)
1825 */ 1728 */
1826int of_remove_property(struct device_node *np, struct property *prop) 1729int of_remove_property(struct device_node *np, struct property *prop)
1827{ 1730{
1828 struct property **next;
1829 unsigned long flags; 1731 unsigned long flags;
1830 int found = 0;
1831 int rc; 1732 int rc;
1832 1733
1833 rc = of_property_notify(OF_RECONFIG_REMOVE_PROPERTY, np, prop); 1734 mutex_lock(&of_mutex);
1834 if (rc)
1835 return rc;
1836 1735
1837 raw_spin_lock_irqsave(&devtree_lock, flags); 1736 raw_spin_lock_irqsave(&devtree_lock, flags);
1838 next = &np->properties; 1737 rc = __of_remove_property(np, prop);
1839 while (*next) {
1840 if (*next == prop) {
1841 /* found the node */
1842 *next = prop->next;
1843 prop->next = np->deadprops;
1844 np->deadprops = prop;
1845 found = 1;
1846 break;
1847 }
1848 next = &(*next)->next;
1849 }
1850 raw_spin_unlock_irqrestore(&devtree_lock, flags); 1738 raw_spin_unlock_irqrestore(&devtree_lock, flags);
1851 1739
1852 if (!found) 1740 if (!rc)
1853 return -ENODEV; 1741 __of_remove_property_sysfs(np, prop);
1854 1742
1855 /* at early boot, bail hear and defer setup to of_init() */ 1743 mutex_unlock(&of_mutex);
1856 if (!of_kset)
1857 return 0;
1858 1744
1859 sysfs_remove_bin_file(&np->kobj, &prop->attr); 1745 if (!rc)
1746 of_property_notify(OF_RECONFIG_REMOVE_PROPERTY, np, prop, NULL);
1860 1747
1861 return 0; 1748 return rc;
1862} 1749}
1863 1750
1864/* 1751int __of_update_property(struct device_node *np, struct property *newprop,
1865 * of_update_property - Update a property in a node, if the property does 1752 struct property **oldpropp)
1866 * not exist, add it.
1867 *
1868 * Note that we don't actually remove it, since we have given out
1869 * who-knows-how-many pointers to the data using get-property.
1870 * Instead we just move the property to the "dead properties" list,
1871 * and add the new property to the property list
1872 */
1873int of_update_property(struct device_node *np, struct property *newprop)
1874{ 1753{
1875 struct property **next, *oldprop; 1754 struct property **next, *oldprop;
1876 unsigned long flags;
1877 int rc;
1878
1879 rc = of_property_notify(OF_RECONFIG_UPDATE_PROPERTY, np, newprop);
1880 if (rc)
1881 return rc;
1882 1755
1883 if (!newprop->name) 1756 for (next = &np->properties; *next; next = &(*next)->next) {
1884 return -EINVAL; 1757 if (of_prop_cmp((*next)->name, newprop->name) == 0)
1758 break;
1759 }
1760 *oldpropp = oldprop = *next;
1885 1761
1886 raw_spin_lock_irqsave(&devtree_lock, flags); 1762 if (oldprop) {
1887 next = &np->properties;
1888 oldprop = __of_find_property(np, newprop->name, NULL);
1889 if (!oldprop) {
1890 /* add the new node */
1891 rc = __of_add_property(np, newprop);
1892 } else while (*next) {
1893 /* replace the node */ 1763 /* replace the node */
1894 if (*next == oldprop) { 1764 newprop->next = oldprop->next;
1895 newprop->next = oldprop->next; 1765 *next = newprop;
1896 *next = newprop; 1766 oldprop->next = np->deadprops;
1897 oldprop->next = np->deadprops; 1767 np->deadprops = oldprop;
1898 np->deadprops = oldprop; 1768 } else {
1899 break; 1769 /* new node */
1900 } 1770 newprop->next = NULL;
1901 next = &(*next)->next; 1771 *next = newprop;
1902 } 1772 }
1903 raw_spin_unlock_irqrestore(&devtree_lock, flags);
1904 if (rc)
1905 return rc;
1906 1773
1774 return 0;
1775}
1776
1777void __of_update_property_sysfs(struct device_node *np, struct property *newprop,
1778 struct property *oldprop)
1779{
1907 /* At early boot, bail out and defer setup to of_init() */ 1780 /* At early boot, bail out and defer setup to of_init() */
1908 if (!of_kset) 1781 if (!of_kset)
1909 return 0; 1782 return;
1910 1783
1911 /* Update the sysfs attribute */
1912 if (oldprop) 1784 if (oldprop)
1913 sysfs_remove_bin_file(&np->kobj, &oldprop->attr); 1785 sysfs_remove_bin_file(&np->kobj, &oldprop->attr);
1914 __of_add_property_sysfs(np, newprop); 1786 __of_add_property_sysfs(np, newprop);
1915
1916 return 0;
1917} 1787}
1918 1788
1919#if defined(CONFIG_OF_DYNAMIC)
1920/* 1789/*
1921 * Support for dynamic device trees. 1790 * of_update_property - Update a property in a node, if the property does
1791 * not exist, add it.
1922 * 1792 *
1923 * On some platforms, the device tree can be manipulated at runtime. 1793 * Note that we don't actually remove it, since we have given out
1924 * The routines in this section support adding, removing and changing 1794 * who-knows-how-many pointers to the data using get-property.
1925 * device tree nodes. 1795 * Instead we just move the property to the "dead properties" list,
1926 */ 1796 * and add the new property to the property list
1927
1928static BLOCKING_NOTIFIER_HEAD(of_reconfig_chain);
1929
1930int of_reconfig_notifier_register(struct notifier_block *nb)
1931{
1932 return blocking_notifier_chain_register(&of_reconfig_chain, nb);
1933}
1934EXPORT_SYMBOL_GPL(of_reconfig_notifier_register);
1935
1936int of_reconfig_notifier_unregister(struct notifier_block *nb)
1937{
1938 return blocking_notifier_chain_unregister(&of_reconfig_chain, nb);
1939}
1940EXPORT_SYMBOL_GPL(of_reconfig_notifier_unregister);
1941
1942int of_reconfig_notify(unsigned long action, void *p)
1943{
1944 int rc;
1945
1946 rc = blocking_notifier_call_chain(&of_reconfig_chain, action, p);
1947 return notifier_to_errno(rc);
1948}
1949
1950/**
1951 * of_attach_node - Plug a device node into the tree and global list.
1952 */ 1797 */
1953int of_attach_node(struct device_node *np) 1798int of_update_property(struct device_node *np, struct property *newprop)
1954{ 1799{
1800 struct property *oldprop;
1955 unsigned long flags; 1801 unsigned long flags;
1956 int rc; 1802 int rc;
1957 1803
1958 rc = of_reconfig_notify(OF_RECONFIG_ATTACH_NODE, np); 1804 if (!newprop->name)
1959 if (rc) 1805 return -EINVAL;
1960 return rc;
1961
1962 raw_spin_lock_irqsave(&devtree_lock, flags);
1963 np->sibling = np->parent->child;
1964 np->allnext = np->parent->allnext;
1965 np->parent->allnext = np;
1966 np->parent->child = np;
1967 of_node_clear_flag(np, OF_DETACHED);
1968 raw_spin_unlock_irqrestore(&devtree_lock, flags);
1969
1970 of_node_add(np);
1971 return 0;
1972}
1973
1974/**
1975 * of_detach_node - "Unplug" a node from the device tree.
1976 *
1977 * The caller must hold a reference to the node. The memory associated with
1978 * the node is not freed until its refcount goes to zero.
1979 */
1980int of_detach_node(struct device_node *np)
1981{
1982 struct device_node *parent;
1983 unsigned long flags;
1984 int rc = 0;
1985 1806
1986 rc = of_reconfig_notify(OF_RECONFIG_DETACH_NODE, np); 1807 mutex_lock(&of_mutex);
1987 if (rc)
1988 return rc;
1989 1808
1990 raw_spin_lock_irqsave(&devtree_lock, flags); 1809 raw_spin_lock_irqsave(&devtree_lock, flags);
1810 rc = __of_update_property(np, newprop, &oldprop);
1811 raw_spin_unlock_irqrestore(&devtree_lock, flags);
1991 1812
1992 if (of_node_check_flag(np, OF_DETACHED)) { 1813 if (!rc)
1993 /* someone already detached it */ 1814 __of_update_property_sysfs(np, newprop, oldprop);
1994 raw_spin_unlock_irqrestore(&devtree_lock, flags);
1995 return rc;
1996 }
1997
1998 parent = np->parent;
1999 if (!parent) {
2000 raw_spin_unlock_irqrestore(&devtree_lock, flags);
2001 return rc;
2002 }
2003 1815
2004 if (of_allnodes == np) 1816 mutex_unlock(&of_mutex);
2005 of_allnodes = np->allnext;
2006 else {
2007 struct device_node *prev;
2008 for (prev = of_allnodes;
2009 prev->allnext != np;
2010 prev = prev->allnext)
2011 ;
2012 prev->allnext = np->allnext;
2013 }
2014 1817
2015 if (parent->child == np) 1818 if (!rc)
2016 parent->child = np->sibling; 1819 of_property_notify(OF_RECONFIG_UPDATE_PROPERTY, np, newprop, oldprop);
2017 else {
2018 struct device_node *prevsib;
2019 for (prevsib = np->parent->child;
2020 prevsib->sibling != np;
2021 prevsib = prevsib->sibling)
2022 ;
2023 prevsib->sibling = np->sibling;
2024 }
2025
2026 of_node_set_flag(np, OF_DETACHED);
2027 raw_spin_unlock_irqrestore(&devtree_lock, flags);
2028 1820
2029 of_node_remove(np);
2030 return rc; 1821 return rc;
2031} 1822}
2032#endif /* defined(CONFIG_OF_DYNAMIC) */
2033 1823
2034static void of_alias_add(struct alias_prop *ap, struct device_node *np, 1824static void of_alias_add(struct alias_prop *ap, struct device_node *np,
2035 int id, const char *stem, int stem_len) 1825 int id, const char *stem, int stem_len)
@@ -2062,9 +1852,12 @@ void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align))
2062 of_chosen = of_find_node_by_path("/chosen@0"); 1852 of_chosen = of_find_node_by_path("/chosen@0");
2063 1853
2064 if (of_chosen) { 1854 if (of_chosen) {
1855 /* linux,stdout-path and /aliases/stdout are for legacy compatibility */
2065 const char *name = of_get_property(of_chosen, "stdout-path", NULL); 1856 const char *name = of_get_property(of_chosen, "stdout-path", NULL);
2066 if (!name) 1857 if (!name)
2067 name = of_get_property(of_chosen, "linux,stdout-path", NULL); 1858 name = of_get_property(of_chosen, "linux,stdout-path", NULL);
1859 if (IS_ENABLED(CONFIG_PPC) && !name)
1860 name = of_get_property(of_aliases, "stdout", NULL);
2068 if (name) 1861 if (name)
2069 of_stdout = of_find_node_by_path(name); 1862 of_stdout = of_find_node_by_path(name);
2070 } 1863 }
@@ -2122,7 +1915,7 @@ int of_alias_get_id(struct device_node *np, const char *stem)
2122 struct alias_prop *app; 1915 struct alias_prop *app;
2123 int id = -ENODEV; 1916 int id = -ENODEV;
2124 1917
2125 mutex_lock(&of_aliases_mutex); 1918 mutex_lock(&of_mutex);
2126 list_for_each_entry(app, &aliases_lookup, link) { 1919 list_for_each_entry(app, &aliases_lookup, link) {
2127 if (strcmp(app->stem, stem) != 0) 1920 if (strcmp(app->stem, stem) != 0)
2128 continue; 1921 continue;
@@ -2132,7 +1925,7 @@ int of_alias_get_id(struct device_node *np, const char *stem)
2132 break; 1925 break;
2133 } 1926 }
2134 } 1927 }
2135 mutex_unlock(&of_aliases_mutex); 1928 mutex_unlock(&of_mutex);
2136 1929
2137 return id; 1930 return id;
2138} 1931}
@@ -2180,20 +1973,22 @@ const char *of_prop_next_string(struct property *prop, const char *cur)
2180EXPORT_SYMBOL_GPL(of_prop_next_string); 1973EXPORT_SYMBOL_GPL(of_prop_next_string);
2181 1974
2182/** 1975/**
2183 * of_device_is_stdout_path - check if a device node matches the 1976 * of_console_check() - Test and setup console for DT setup
2184 * linux,stdout-path property 1977 * @dn - Pointer to device node
2185 * 1978 * @name - Name to use for preferred console without index. ex. "ttyS"
2186 * Check if this device node matches the linux,stdout-path property 1979 * @index - Index to use for preferred console.
2187 * in the chosen node. return true if yes, false otherwise. 1980 *
1981 * Check if the given device node matches the stdout-path property in the
1982 * /chosen node. If it does then register it as the preferred console and return
1983 * TRUE. Otherwise return FALSE.
2188 */ 1984 */
2189int of_device_is_stdout_path(struct device_node *dn) 1985bool of_console_check(struct device_node *dn, char *name, int index)
2190{ 1986{
2191 if (!of_stdout) 1987 if (!dn || dn != of_stdout || console_set_on_cmdline)
2192 return false; 1988 return false;
2193 1989 return add_preferred_console(name, index, NULL);
2194 return of_stdout == dn;
2195} 1990}
2196EXPORT_SYMBOL_GPL(of_device_is_stdout_path); 1991EXPORT_SYMBOL_GPL(of_console_check);
2197 1992
2198/** 1993/**
2199 * of_find_next_cache_node - Find a node's subsidiary cache 1994 * of_find_next_cache_node - Find a node's subsidiary cache
diff --git a/drivers/of/device.c b/drivers/of/device.c
index dafb9736ab9b..46d6c75c1404 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -160,7 +160,7 @@ void of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
160 add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen); 160 add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen);
161 161
162 seen = 0; 162 seen = 0;
163 mutex_lock(&of_aliases_mutex); 163 mutex_lock(&of_mutex);
164 list_for_each_entry(app, &aliases_lookup, link) { 164 list_for_each_entry(app, &aliases_lookup, link) {
165 if (dev->of_node == app->np) { 165 if (dev->of_node == app->np) {
166 add_uevent_var(env, "OF_ALIAS_%d=%s", seen, 166 add_uevent_var(env, "OF_ALIAS_%d=%s", seen,
@@ -168,7 +168,7 @@ void of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
168 seen++; 168 seen++;
169 } 169 }
170 } 170 }
171 mutex_unlock(&of_aliases_mutex); 171 mutex_unlock(&of_mutex);
172} 172}
173 173
174int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env) 174int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
new file mode 100644
index 000000000000..54fecc49a1fe
--- /dev/null
+++ b/drivers/of/dynamic.c
@@ -0,0 +1,660 @@
1/*
2 * Support for dynamic device trees.
3 *
4 * On some platforms, the device tree can be manipulated at runtime.
5 * The routines in this section support adding, removing and changing
6 * device tree nodes.
7 */
8
9#include <linux/of.h>
10#include <linux/spinlock.h>
11#include <linux/slab.h>
12#include <linux/string.h>
13#include <linux/proc_fs.h>
14
15#include "of_private.h"
16
17/**
18 * of_node_get() - Increment refcount of a node
19 * @node: Node to inc refcount, NULL is supported to simplify writing of
20 * callers
21 *
22 * Returns node.
23 */
24struct device_node *of_node_get(struct device_node *node)
25{
26 if (node)
27 kobject_get(&node->kobj);
28 return node;
29}
30EXPORT_SYMBOL(of_node_get);
31
32/**
33 * of_node_put() - Decrement refcount of a node
34 * @node: Node to dec refcount, NULL is supported to simplify writing of
35 * callers
36 */
37void of_node_put(struct device_node *node)
38{
39 if (node)
40 kobject_put(&node->kobj);
41}
42EXPORT_SYMBOL(of_node_put);
43
44void __of_detach_node_sysfs(struct device_node *np)
45{
46 struct property *pp;
47
48 BUG_ON(!of_node_is_initialized(np));
49 if (!of_kset)
50 return;
51
52 /* only remove properties if on sysfs */
53 if (of_node_is_attached(np)) {
54 for_each_property_of_node(np, pp)
55 sysfs_remove_bin_file(&np->kobj, &pp->attr);
56 kobject_del(&np->kobj);
57 }
58
59 /* finally remove the kobj_init ref */
60 of_node_put(np);
61}
62
63static BLOCKING_NOTIFIER_HEAD(of_reconfig_chain);
64
65int of_reconfig_notifier_register(struct notifier_block *nb)
66{
67 return blocking_notifier_chain_register(&of_reconfig_chain, nb);
68}
69EXPORT_SYMBOL_GPL(of_reconfig_notifier_register);
70
71int of_reconfig_notifier_unregister(struct notifier_block *nb)
72{
73 return blocking_notifier_chain_unregister(&of_reconfig_chain, nb);
74}
75EXPORT_SYMBOL_GPL(of_reconfig_notifier_unregister);
76
77int of_reconfig_notify(unsigned long action, void *p)
78{
79 int rc;
80
81 rc = blocking_notifier_call_chain(&of_reconfig_chain, action, p);
82 return notifier_to_errno(rc);
83}
84
85int of_property_notify(int action, struct device_node *np,
86 struct property *prop, struct property *oldprop)
87{
88 struct of_prop_reconfig pr;
89
90 /* only call notifiers if the node is attached */
91 if (!of_node_is_attached(np))
92 return 0;
93
94 pr.dn = np;
95 pr.prop = prop;
96 pr.old_prop = oldprop;
97 return of_reconfig_notify(action, &pr);
98}
99
100void __of_attach_node(struct device_node *np)
101{
102 const __be32 *phandle;
103 int sz;
104
105 np->name = __of_get_property(np, "name", NULL) ? : "<NULL>";
106 np->type = __of_get_property(np, "device_type", NULL) ? : "<NULL>";
107
108 phandle = __of_get_property(np, "phandle", &sz);
109 if (!phandle)
110 phandle = __of_get_property(np, "linux,phandle", &sz);
111 if (IS_ENABLED(PPC_PSERIES) && !phandle)
112 phandle = __of_get_property(np, "ibm,phandle", &sz);
113 np->phandle = (phandle && (sz >= 4)) ? be32_to_cpup(phandle) : 0;
114
115 np->child = NULL;
116 np->sibling = np->parent->child;
117 np->allnext = np->parent->allnext;
118 np->parent->allnext = np;
119 np->parent->child = np;
120 of_node_clear_flag(np, OF_DETACHED);
121}
122
123/**
124 * of_attach_node() - Plug a device node into the tree and global list.
125 */
126int of_attach_node(struct device_node *np)
127{
128 unsigned long flags;
129
130 mutex_lock(&of_mutex);
131 raw_spin_lock_irqsave(&devtree_lock, flags);
132 __of_attach_node(np);
133 raw_spin_unlock_irqrestore(&devtree_lock, flags);
134
135 __of_attach_node_sysfs(np);
136 mutex_unlock(&of_mutex);
137
138 of_reconfig_notify(OF_RECONFIG_ATTACH_NODE, np);
139
140 return 0;
141}
142
143void __of_detach_node(struct device_node *np)
144{
145 struct device_node *parent;
146
147 if (WARN_ON(of_node_check_flag(np, OF_DETACHED)))
148 return;
149
150 parent = np->parent;
151 if (WARN_ON(!parent))
152 return;
153
154 if (of_allnodes == np)
155 of_allnodes = np->allnext;
156 else {
157 struct device_node *prev;
158 for (prev = of_allnodes;
159 prev->allnext != np;
160 prev = prev->allnext)
161 ;
162 prev->allnext = np->allnext;
163 }
164
165 if (parent->child == np)
166 parent->child = np->sibling;
167 else {
168 struct device_node *prevsib;
169 for (prevsib = np->parent->child;
170 prevsib->sibling != np;
171 prevsib = prevsib->sibling)
172 ;
173 prevsib->sibling = np->sibling;
174 }
175
176 of_node_set_flag(np, OF_DETACHED);
177}
178
179/**
180 * of_detach_node() - "Unplug" a node from the device tree.
181 *
182 * The caller must hold a reference to the node. The memory associated with
183 * the node is not freed until its refcount goes to zero.
184 */
185int of_detach_node(struct device_node *np)
186{
187 unsigned long flags;
188 int rc = 0;
189
190 mutex_lock(&of_mutex);
191 raw_spin_lock_irqsave(&devtree_lock, flags);
192 __of_detach_node(np);
193 raw_spin_unlock_irqrestore(&devtree_lock, flags);
194
195 __of_detach_node_sysfs(np);
196 mutex_unlock(&of_mutex);
197
198 of_reconfig_notify(OF_RECONFIG_DETACH_NODE, np);
199
200 return rc;
201}
202
203/**
204 * of_node_release() - release a dynamically allocated node
205 * @kref: kref element of the node to be released
206 *
207 * In of_node_put() this function is passed to kref_put() as the destructor.
208 */
209void of_node_release(struct kobject *kobj)
210{
211 struct device_node *node = kobj_to_device_node(kobj);
212 struct property *prop = node->properties;
213
214 /* We should never be releasing nodes that haven't been detached. */
215 if (!of_node_check_flag(node, OF_DETACHED)) {
216 pr_err("ERROR: Bad of_node_put() on %s\n", node->full_name);
217 dump_stack();
218 return;
219 }
220
221 if (!of_node_check_flag(node, OF_DYNAMIC))
222 return;
223
224 while (prop) {
225 struct property *next = prop->next;
226 kfree(prop->name);
227 kfree(prop->value);
228 kfree(prop);
229 prop = next;
230
231 if (!prop) {
232 prop = node->deadprops;
233 node->deadprops = NULL;
234 }
235 }
236 kfree(node->full_name);
237 kfree(node->data);
238 kfree(node);
239}
240
241/**
242 * __of_prop_dup - Copy a property dynamically.
243 * @prop: Property to copy
244 * @allocflags: Allocation flags (typically pass GFP_KERNEL)
245 *
246 * Copy a property by dynamically allocating the memory of both the
247 * property stucture and the property name & contents. The property's
248 * flags have the OF_DYNAMIC bit set so that we can differentiate between
249 * dynamically allocated properties and not.
250 * Returns the newly allocated property or NULL on out of memory error.
251 */
252struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags)
253{
254 struct property *new;
255
256 new = kzalloc(sizeof(*new), allocflags);
257 if (!new)
258 return NULL;
259
260 /*
261 * NOTE: There is no check for zero length value.
262 * In case of a boolean property, this will allocate a value
263 * of zero bytes. We do this to work around the use
264 * of of_get_property() calls on boolean values.
265 */
266 new->name = kstrdup(prop->name, allocflags);
267 new->value = kmemdup(prop->value, prop->length, allocflags);
268 new->length = prop->length;
269 if (!new->name || !new->value)
270 goto err_free;
271
272 /* mark the property as dynamic */
273 of_property_set_flag(new, OF_DYNAMIC);
274
275 return new;
276
277 err_free:
278 kfree(new->name);
279 kfree(new->value);
280 kfree(new);
281 return NULL;
282}
283
284/**
285 * __of_node_alloc() - Create an empty device node dynamically.
286 * @full_name: Full name of the new device node
287 * @allocflags: Allocation flags (typically pass GFP_KERNEL)
288 *
289 * Create an empty device tree node, suitable for further modification.
290 * The node data are dynamically allocated and all the node flags
291 * have the OF_DYNAMIC & OF_DETACHED bits set.
292 * Returns the newly allocated node or NULL on out of memory error.
293 */
294struct device_node *__of_node_alloc(const char *full_name, gfp_t allocflags)
295{
296 struct device_node *node;
297
298 node = kzalloc(sizeof(*node), allocflags);
299 if (!node)
300 return NULL;
301
302 node->full_name = kstrdup(full_name, allocflags);
303 of_node_set_flag(node, OF_DYNAMIC);
304 of_node_set_flag(node, OF_DETACHED);
305 if (!node->full_name)
306 goto err_free;
307
308 of_node_init(node);
309
310 return node;
311
312 err_free:
313 kfree(node->full_name);
314 kfree(node);
315 return NULL;
316}
317
318static void __of_changeset_entry_destroy(struct of_changeset_entry *ce)
319{
320 of_node_put(ce->np);
321 list_del(&ce->node);
322 kfree(ce);
323}
324
325#ifdef DEBUG
326static void __of_changeset_entry_dump(struct of_changeset_entry *ce)
327{
328 switch (ce->action) {
329 case OF_RECONFIG_ADD_PROPERTY:
330 pr_debug("%p: %s %s/%s\n",
331 ce, "ADD_PROPERTY ", ce->np->full_name,
332 ce->prop->name);
333 break;
334 case OF_RECONFIG_REMOVE_PROPERTY:
335 pr_debug("%p: %s %s/%s\n",
336 ce, "REMOVE_PROPERTY", ce->np->full_name,
337 ce->prop->name);
338 break;
339 case OF_RECONFIG_UPDATE_PROPERTY:
340 pr_debug("%p: %s %s/%s\n",
341 ce, "UPDATE_PROPERTY", ce->np->full_name,
342 ce->prop->name);
343 break;
344 case OF_RECONFIG_ATTACH_NODE:
345 pr_debug("%p: %s %s\n",
346 ce, "ATTACH_NODE ", ce->np->full_name);
347 break;
348 case OF_RECONFIG_DETACH_NODE:
349 pr_debug("%p: %s %s\n",
350 ce, "DETACH_NODE ", ce->np->full_name);
351 break;
352 }
353}
354#else
355static inline void __of_changeset_entry_dump(struct of_changeset_entry *ce)
356{
357 /* empty */
358}
359#endif
360
361static void __of_changeset_entry_invert(struct of_changeset_entry *ce,
362 struct of_changeset_entry *rce)
363{
364 memcpy(rce, ce, sizeof(*rce));
365
366 switch (ce->action) {
367 case OF_RECONFIG_ATTACH_NODE:
368 rce->action = OF_RECONFIG_DETACH_NODE;
369 break;
370 case OF_RECONFIG_DETACH_NODE:
371 rce->action = OF_RECONFIG_ATTACH_NODE;
372 break;
373 case OF_RECONFIG_ADD_PROPERTY:
374 rce->action = OF_RECONFIG_REMOVE_PROPERTY;
375 break;
376 case OF_RECONFIG_REMOVE_PROPERTY:
377 rce->action = OF_RECONFIG_ADD_PROPERTY;
378 break;
379 case OF_RECONFIG_UPDATE_PROPERTY:
380 rce->old_prop = ce->prop;
381 rce->prop = ce->old_prop;
382 break;
383 }
384}
385
386static void __of_changeset_entry_notify(struct of_changeset_entry *ce, bool revert)
387{
388 struct of_changeset_entry ce_inverted;
389 int ret;
390
391 if (revert) {
392 __of_changeset_entry_invert(ce, &ce_inverted);
393 ce = &ce_inverted;
394 }
395
396 switch (ce->action) {
397 case OF_RECONFIG_ATTACH_NODE:
398 case OF_RECONFIG_DETACH_NODE:
399 ret = of_reconfig_notify(ce->action, ce->np);
400 break;
401 case OF_RECONFIG_ADD_PROPERTY:
402 case OF_RECONFIG_REMOVE_PROPERTY:
403 case OF_RECONFIG_UPDATE_PROPERTY:
404 ret = of_property_notify(ce->action, ce->np, ce->prop, ce->old_prop);
405 break;
406 default:
407 pr_err("%s: invalid devicetree changeset action: %i\n", __func__,
408 (int)ce->action);
409 return;
410 }
411
412 if (ret)
413 pr_err("%s: notifier error @%s\n", __func__, ce->np->full_name);
414}
415
416static int __of_changeset_entry_apply(struct of_changeset_entry *ce)
417{
418 struct property *old_prop, **propp;
419 unsigned long flags;
420 int ret = 0;
421
422 __of_changeset_entry_dump(ce);
423
424 raw_spin_lock_irqsave(&devtree_lock, flags);
425 switch (ce->action) {
426 case OF_RECONFIG_ATTACH_NODE:
427 __of_attach_node(ce->np);
428 break;
429 case OF_RECONFIG_DETACH_NODE:
430 __of_detach_node(ce->np);
431 break;
432 case OF_RECONFIG_ADD_PROPERTY:
433 /* If the property is in deadprops then it must be removed */
434 for (propp = &ce->np->deadprops; *propp; propp = &(*propp)->next) {
435 if (*propp == ce->prop) {
436 *propp = ce->prop->next;
437 ce->prop->next = NULL;
438 break;
439 }
440 }
441
442 ret = __of_add_property(ce->np, ce->prop);
443 if (ret) {
444 pr_err("%s: add_property failed @%s/%s\n",
445 __func__, ce->np->full_name,
446 ce->prop->name);
447 break;
448 }
449 break;
450 case OF_RECONFIG_REMOVE_PROPERTY:
451 ret = __of_remove_property(ce->np, ce->prop);
452 if (ret) {
453 pr_err("%s: remove_property failed @%s/%s\n",
454 __func__, ce->np->full_name,
455 ce->prop->name);
456 break;
457 }
458 break;
459
460 case OF_RECONFIG_UPDATE_PROPERTY:
461 /* If the property is in deadprops then it must be removed */
462 for (propp = &ce->np->deadprops; *propp; propp = &(*propp)->next) {
463 if (*propp == ce->prop) {
464 *propp = ce->prop->next;
465 ce->prop->next = NULL;
466 break;
467 }
468 }
469
470 ret = __of_update_property(ce->np, ce->prop, &old_prop);
471 if (ret) {
472 pr_err("%s: update_property failed @%s/%s\n",
473 __func__, ce->np->full_name,
474 ce->prop->name);
475 break;
476 }
477 break;
478 default:
479 ret = -EINVAL;
480 }
481 raw_spin_unlock_irqrestore(&devtree_lock, flags);
482
483 if (ret)
484 return ret;
485
486 switch (ce->action) {
487 case OF_RECONFIG_ATTACH_NODE:
488 __of_attach_node_sysfs(ce->np);
489 break;
490 case OF_RECONFIG_DETACH_NODE:
491 __of_detach_node_sysfs(ce->np);
492 break;
493 case OF_RECONFIG_ADD_PROPERTY:
494 /* ignore duplicate names */
495 __of_add_property_sysfs(ce->np, ce->prop);
496 break;
497 case OF_RECONFIG_REMOVE_PROPERTY:
498 __of_remove_property_sysfs(ce->np, ce->prop);
499 break;
500 case OF_RECONFIG_UPDATE_PROPERTY:
501 __of_update_property_sysfs(ce->np, ce->prop, ce->old_prop);
502 break;
503 }
504
505 return 0;
506}
507
508static inline int __of_changeset_entry_revert(struct of_changeset_entry *ce)
509{
510 struct of_changeset_entry ce_inverted;
511
512 __of_changeset_entry_invert(ce, &ce_inverted);
513 return __of_changeset_entry_apply(&ce_inverted);
514}
515
516/**
517 * of_changeset_init - Initialize a changeset for use
518 *
519 * @ocs: changeset pointer
520 *
521 * Initialize a changeset structure
522 */
523void of_changeset_init(struct of_changeset *ocs)
524{
525 memset(ocs, 0, sizeof(*ocs));
526 INIT_LIST_HEAD(&ocs->entries);
527}
528
529/**
530 * of_changeset_destroy - Destroy a changeset
531 *
532 * @ocs: changeset pointer
533 *
534 * Destroys a changeset. Note that if a changeset is applied,
535 * its changes to the tree cannot be reverted.
536 */
537void of_changeset_destroy(struct of_changeset *ocs)
538{
539 struct of_changeset_entry *ce, *cen;
540
541 list_for_each_entry_safe_reverse(ce, cen, &ocs->entries, node)
542 __of_changeset_entry_destroy(ce);
543}
544
545/**
546 * of_changeset_apply - Applies a changeset
547 *
548 * @ocs: changeset pointer
549 *
550 * Applies a changeset to the live tree.
551 * Any side-effects of live tree state changes are applied here on
552 * sucess, like creation/destruction of devices and side-effects
553 * like creation of sysfs properties and directories.
554 * Returns 0 on success, a negative error value in case of an error.
555 * On error the partially applied effects are reverted.
556 */
557int of_changeset_apply(struct of_changeset *ocs)
558{
559 struct of_changeset_entry *ce;
560 int ret;
561
562 /* perform the rest of the work */
563 pr_debug("of_changeset: applying...\n");
564 list_for_each_entry(ce, &ocs->entries, node) {
565 ret = __of_changeset_entry_apply(ce);
566 if (ret) {
567 pr_err("%s: Error applying changeset (%d)\n", __func__, ret);
568 list_for_each_entry_continue_reverse(ce, &ocs->entries, node)
569 __of_changeset_entry_revert(ce);
570 return ret;
571 }
572 }
573 pr_debug("of_changeset: applied, emitting notifiers.\n");
574
575 /* drop the global lock while emitting notifiers */
576 mutex_unlock(&of_mutex);
577 list_for_each_entry(ce, &ocs->entries, node)
578 __of_changeset_entry_notify(ce, 0);
579 mutex_lock(&of_mutex);
580 pr_debug("of_changeset: notifiers sent.\n");
581
582 return 0;
583}
584
585/**
586 * of_changeset_revert - Reverts an applied changeset
587 *
588 * @ocs: changeset pointer
589 *
590 * Reverts a changeset returning the state of the tree to what it
591 * was before the application.
592 * Any side-effects like creation/destruction of devices and
593 * removal of sysfs properties and directories are applied.
594 * Returns 0 on success, a negative error value in case of an error.
595 */
596int of_changeset_revert(struct of_changeset *ocs)
597{
598 struct of_changeset_entry *ce;
599 int ret;
600
601 pr_debug("of_changeset: reverting...\n");
602 list_for_each_entry_reverse(ce, &ocs->entries, node) {
603 ret = __of_changeset_entry_revert(ce);
604 if (ret) {
605 pr_err("%s: Error reverting changeset (%d)\n", __func__, ret);
606 list_for_each_entry_continue(ce, &ocs->entries, node)
607 __of_changeset_entry_apply(ce);
608 return ret;
609 }
610 }
611 pr_debug("of_changeset: reverted, emitting notifiers.\n");
612
613 /* drop the global lock while emitting notifiers */
614 mutex_unlock(&of_mutex);
615 list_for_each_entry_reverse(ce, &ocs->entries, node)
616 __of_changeset_entry_notify(ce, 1);
617 mutex_lock(&of_mutex);
618 pr_debug("of_changeset: notifiers sent.\n");
619
620 return 0;
621}
622
623/**
624 * of_changeset_action - Perform a changeset action
625 *
626 * @ocs: changeset pointer
627 * @action: action to perform
628 * @np: Pointer to device node
629 * @prop: Pointer to property
630 *
631 * On action being one of:
632 * + OF_RECONFIG_ATTACH_NODE
633 * + OF_RECONFIG_DETACH_NODE,
634 * + OF_RECONFIG_ADD_PROPERTY
635 * + OF_RECONFIG_REMOVE_PROPERTY,
636 * + OF_RECONFIG_UPDATE_PROPERTY
637 * Returns 0 on success, a negative error value in case of an error.
638 */
639int of_changeset_action(struct of_changeset *ocs, unsigned long action,
640 struct device_node *np, struct property *prop)
641{
642 struct of_changeset_entry *ce;
643
644 ce = kzalloc(sizeof(*ce), GFP_KERNEL);
645 if (!ce) {
646 pr_err("%s: Failed to allocate\n", __func__);
647 return -ENOMEM;
648 }
649 /* get a reference to the node */
650 ce->action = action;
651 ce->np = of_node_get(np);
652 ce->prop = prop;
653
654 if (action == OF_RECONFIG_UPDATE_PROPERTY && prop)
655 ce->old_prop = of_find_property(np, prop->name, NULL);
656
657 /* add it to the list */
658 list_add_tail(&ce->node, &ocs->entries);
659 return 0;
660}
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 9aa012e6ea0a..f46a24ffa3fe 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -923,24 +923,24 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
923} 923}
924 924
925#ifdef CONFIG_HAVE_MEMBLOCK 925#ifdef CONFIG_HAVE_MEMBLOCK
926#define MAX_PHYS_ADDR ((phys_addr_t)~0)
927
926void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size) 928void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
927{ 929{
928 const u64 phys_offset = __pa(PAGE_OFFSET); 930 const u64 phys_offset = __pa(PAGE_OFFSET);
929 base &= PAGE_MASK; 931 base &= PAGE_MASK;
930 size &= PAGE_MASK; 932 size &= PAGE_MASK;
931 933
932 if (sizeof(phys_addr_t) < sizeof(u64)) { 934 if (base > MAX_PHYS_ADDR) {
933 if (base > ULONG_MAX) { 935 pr_warning("Ignoring memory block 0x%llx - 0x%llx\n",
934 pr_warning("Ignoring memory block 0x%llx - 0x%llx\n", 936 base, base + size);
935 base, base + size); 937 return;
936 return; 938 }
937 }
938 939
939 if (base + size > ULONG_MAX) { 940 if (base + size > MAX_PHYS_ADDR) {
940 pr_warning("Ignoring memory range 0x%lx - 0x%llx\n", 941 pr_warning("Ignoring memory range 0x%lx - 0x%llx\n",
941 ULONG_MAX, base + size); 942 ULONG_MAX, base + size);
942 size = ULONG_MAX - base; 943 size = MAX_PHYS_ADDR - base;
943 }
944 } 944 }
945 945
946 if (base + size < phys_offset) { 946 if (base + size < phys_offset) {
diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h
index ff350c8fa7ac..858e0a5d9a11 100644
--- a/drivers/of/of_private.h
+++ b/drivers/of/of_private.h
@@ -31,6 +31,63 @@ struct alias_prop {
31 char stem[0]; 31 char stem[0];
32}; 32};
33 33
34extern struct mutex of_aliases_mutex; 34extern struct mutex of_mutex;
35extern struct list_head aliases_lookup; 35extern struct list_head aliases_lookup;
36extern struct kset *of_kset;
37
38
39static inline struct device_node *kobj_to_device_node(struct kobject *kobj)
40{
41 return container_of(kobj, struct device_node, kobj);
42}
43
44#if defined(CONFIG_OF_DYNAMIC)
45extern int of_property_notify(int action, struct device_node *np,
46 struct property *prop, struct property *old_prop);
47extern void of_node_release(struct kobject *kobj);
48#else /* CONFIG_OF_DYNAMIC */
49static inline int of_property_notify(int action, struct device_node *np,
50 struct property *prop, struct property *old_prop)
51{
52 return 0;
53}
54#endif /* CONFIG_OF_DYNAMIC */
55
56/**
57 * General utilities for working with live trees.
58 *
59 * All functions with two leading underscores operate
60 * without taking node references, so you either have to
61 * own the devtree lock or work on detached trees only.
62 */
63struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags);
64struct device_node *__of_node_alloc(const char *full_name, gfp_t allocflags);
65
66extern const void *__of_get_property(const struct device_node *np,
67 const char *name, int *lenp);
68extern int __of_add_property(struct device_node *np, struct property *prop);
69extern int __of_add_property_sysfs(struct device_node *np,
70 struct property *prop);
71extern int __of_remove_property(struct device_node *np, struct property *prop);
72extern void __of_remove_property_sysfs(struct device_node *np,
73 struct property *prop);
74extern int __of_update_property(struct device_node *np,
75 struct property *newprop, struct property **oldprop);
76extern void __of_update_property_sysfs(struct device_node *np,
77 struct property *newprop, struct property *oldprop);
78
79extern void __of_attach_node(struct device_node *np);
80extern int __of_attach_node_sysfs(struct device_node *np);
81extern void __of_detach_node(struct device_node *np);
82extern void __of_detach_node_sysfs(struct device_node *np);
83
84/* iterators for transactions, used for overlays */
85/* forward iterator */
86#define for_each_transaction_entry(_oft, _te) \
87 list_for_each_entry(_te, &(_oft)->te_list, node)
88
89/* reverse iterator */
90#define for_each_transaction_entry_reverse(_oft, _te) \
91 list_for_each_entry_reverse(_te, &(_oft)->te_list, node)
92
36#endif /* _LINUX_OF_PRIVATE_H */ 93#endif /* _LINUX_OF_PRIVATE_H */
diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index 632aae861375..59fb12e84e6b 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -206,8 +206,16 @@ void __init fdt_init_reserved_mem(void)
206 for (i = 0; i < reserved_mem_count; i++) { 206 for (i = 0; i < reserved_mem_count; i++) {
207 struct reserved_mem *rmem = &reserved_mem[i]; 207 struct reserved_mem *rmem = &reserved_mem[i];
208 unsigned long node = rmem->fdt_node; 208 unsigned long node = rmem->fdt_node;
209 int len;
210 const __be32 *prop;
209 int err = 0; 211 int err = 0;
210 212
213 prop = of_get_flat_dt_prop(node, "phandle", &len);
214 if (!prop)
215 prop = of_get_flat_dt_prop(node, "linux,phandle", &len);
216 if (prop)
217 rmem->phandle = of_read_number(prop, len/4);
218
211 if (rmem->size == 0) 219 if (rmem->size == 0)
212 err = __reserved_mem_alloc_size(node, rmem->name, 220 err = __reserved_mem_alloc_size(node, rmem->name,
213 &rmem->base, &rmem->size); 221 &rmem->base, &rmem->size);
@@ -215,3 +223,65 @@ void __init fdt_init_reserved_mem(void)
215 __reserved_mem_init_node(rmem); 223 __reserved_mem_init_node(rmem);
216 } 224 }
217} 225}
226
227static inline struct reserved_mem *__find_rmem(struct device_node *node)
228{
229 unsigned int i;
230
231 if (!node->phandle)
232 return NULL;
233
234 for (i = 0; i < reserved_mem_count; i++)
235 if (reserved_mem[i].phandle == node->phandle)
236 return &reserved_mem[i];
237 return NULL;
238}
239
240/**
241 * of_reserved_mem_device_init() - assign reserved memory region to given device
242 *
243 * This function assign memory region pointed by "memory-region" device tree
244 * property to the given device.
245 */
246void of_reserved_mem_device_init(struct device *dev)
247{
248 struct reserved_mem *rmem;
249 struct device_node *np;
250
251 np = of_parse_phandle(dev->of_node, "memory-region", 0);
252 if (!np)
253 return;
254
255 rmem = __find_rmem(np);
256 of_node_put(np);
257
258 if (!rmem || !rmem->ops || !rmem->ops->device_init)
259 return;
260
261 rmem->ops->device_init(rmem, dev);
262 dev_info(dev, "assigned reserved memory node %s\n", rmem->name);
263}
264
265/**
266 * of_reserved_mem_device_release() - release reserved memory device structures
267 *
268 * This function releases structures allocated for memory region handling for
269 * the given device.
270 */
271void of_reserved_mem_device_release(struct device *dev)
272{
273 struct reserved_mem *rmem;
274 struct device_node *np;
275
276 np = of_parse_phandle(dev->of_node, "memory-region", 0);
277 if (!np)
278 return;
279
280 rmem = __find_rmem(np);
281 of_node_put(np);
282
283 if (!rmem || !rmem->ops || !rmem->ops->device_release)
284 return;
285
286 rmem->ops->device_release(rmem, dev);
287}
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 500436f9be7f..0197725e033a 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -422,6 +422,7 @@ static int of_platform_bus_create(struct device_node *bus,
422 break; 422 break;
423 } 423 }
424 } 424 }
425 of_node_set_flag(bus, OF_POPULATED_BUS);
425 return rc; 426 return rc;
426} 427}
427 428
@@ -508,19 +509,13 @@ EXPORT_SYMBOL_GPL(of_platform_populate);
508 509
509static int of_platform_device_destroy(struct device *dev, void *data) 510static int of_platform_device_destroy(struct device *dev, void *data)
510{ 511{
511 bool *children_left = data;
512
513 /* Do not touch devices not populated from the device tree */ 512 /* Do not touch devices not populated from the device tree */
514 if (!dev->of_node || !of_node_check_flag(dev->of_node, OF_POPULATED)) { 513 if (!dev->of_node || !of_node_check_flag(dev->of_node, OF_POPULATED))
515 *children_left = true;
516 return 0; 514 return 0;
517 }
518 515
519 /* Recurse, but don't touch this device if it has any children left */ 516 /* Recurse for any nodes that were treated as busses */
520 if (of_platform_depopulate(dev) != 0) { 517 if (of_node_check_flag(dev->of_node, OF_POPULATED_BUS))
521 *children_left = true; 518 device_for_each_child(dev, NULL, of_platform_device_destroy);
522 return 0;
523 }
524 519
525 if (dev->bus == &platform_bus_type) 520 if (dev->bus == &platform_bus_type)
526 platform_device_unregister(to_platform_device(dev)); 521 platform_device_unregister(to_platform_device(dev));
@@ -528,19 +523,15 @@ static int of_platform_device_destroy(struct device *dev, void *data)
528 else if (dev->bus == &amba_bustype) 523 else if (dev->bus == &amba_bustype)
529 amba_device_unregister(to_amba_device(dev)); 524 amba_device_unregister(to_amba_device(dev));
530#endif 525#endif
531 else {
532 *children_left = true;
533 return 0;
534 }
535 526
536 of_node_clear_flag(dev->of_node, OF_POPULATED); 527 of_node_clear_flag(dev->of_node, OF_POPULATED);
537 528 of_node_clear_flag(dev->of_node, OF_POPULATED_BUS);
538 return 0; 529 return 0;
539} 530}
540 531
541/** 532/**
542 * of_platform_depopulate() - Remove devices populated from device tree 533 * of_platform_depopulate() - Remove devices populated from device tree
543 * @parent: device which childred will be removed 534 * @parent: device which children will be removed
544 * 535 *
545 * Complementary to of_platform_populate(), this function removes children 536 * Complementary to of_platform_populate(), this function removes children
546 * of the given device (and, recurrently, their children) that have been 537 * of the given device (and, recurrently, their children) that have been
@@ -550,14 +541,9 @@ static int of_platform_device_destroy(struct device *dev, void *data)
550 * Returns 0 when all children devices have been removed or 541 * Returns 0 when all children devices have been removed or
551 * -EBUSY when some children remained. 542 * -EBUSY when some children remained.
552 */ 543 */
553int of_platform_depopulate(struct device *parent) 544void of_platform_depopulate(struct device *parent)
554{ 545{
555 bool children_left = false; 546 device_for_each_child(parent, NULL, of_platform_device_destroy);
556
557 device_for_each_child(parent, &children_left,
558 of_platform_device_destroy);
559
560 return children_left ? -EBUSY : 0;
561} 547}
562EXPORT_SYMBOL_GPL(of_platform_depopulate); 548EXPORT_SYMBOL_GPL(of_platform_depopulate);
563 549
diff --git a/drivers/of/selftest.c b/drivers/of/selftest.c
index 077314eebb95..d41002667833 100644
--- a/drivers/of/selftest.c
+++ b/drivers/of/selftest.c
@@ -9,6 +9,7 @@
9#include <linux/errno.h> 9#include <linux/errno.h>
10#include <linux/module.h> 10#include <linux/module.h>
11#include <linux/of.h> 11#include <linux/of.h>
12#include <linux/of_fdt.h>
12#include <linux/of_irq.h> 13#include <linux/of_irq.h>
13#include <linux/of_platform.h> 14#include <linux/of_platform.h>
14#include <linux/list.h> 15#include <linux/list.h>
@@ -16,11 +17,17 @@
16#include <linux/slab.h> 17#include <linux/slab.h>
17#include <linux/device.h> 18#include <linux/device.h>
18 19
20#include "of_private.h"
21
19static struct selftest_results { 22static struct selftest_results {
20 int passed; 23 int passed;
21 int failed; 24 int failed;
22} selftest_results; 25} selftest_results;
23 26
27#define NO_OF_NODES 2
28static struct device_node *nodes[NO_OF_NODES];
29static int last_node_index;
30
24#define selftest(result, fmt, ...) { \ 31#define selftest(result, fmt, ...) { \
25 if (!(result)) { \ 32 if (!(result)) { \
26 selftest_results.failed++; \ 33 selftest_results.failed++; \
@@ -266,6 +273,81 @@ static void __init of_selftest_property_match_string(void)
266 selftest(rc == -EILSEQ, "unterminated string; rc=%i", rc); 273 selftest(rc == -EILSEQ, "unterminated string; rc=%i", rc);
267} 274}
268 275
276#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
277 (p1)->value && (p2)->value && \
278 !memcmp((p1)->value, (p2)->value, (p1)->length) && \
279 !strcmp((p1)->name, (p2)->name))
280static void __init of_selftest_property_copy(void)
281{
282#ifdef CONFIG_OF_DYNAMIC
283 struct property p1 = { .name = "p1", .length = 0, .value = "" };
284 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
285 struct property *new;
286
287 new = __of_prop_dup(&p1, GFP_KERNEL);
288 selftest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
289 kfree(new->value);
290 kfree(new->name);
291 kfree(new);
292
293 new = __of_prop_dup(&p2, GFP_KERNEL);
294 selftest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
295 kfree(new->value);
296 kfree(new->name);
297 kfree(new);
298#endif
299}
300
301static void __init of_selftest_changeset(void)
302{
303#ifdef CONFIG_OF_DYNAMIC
304 struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
305 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
306 struct property *ppremove;
307 struct device_node *n1, *n2, *n21, *nremove, *parent;
308 struct of_changeset chgset;
309
310 of_changeset_init(&chgset);
311 n1 = __of_node_alloc("/testcase-data/changeset/n1", GFP_KERNEL);
312 selftest(n1, "testcase setup failure\n");
313 n2 = __of_node_alloc("/testcase-data/changeset/n2", GFP_KERNEL);
314 selftest(n2, "testcase setup failure\n");
315 n21 = __of_node_alloc("/testcase-data/changeset/n2/n21", GFP_KERNEL);
316 selftest(n21, "testcase setup failure %p\n", n21);
317 nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
318 selftest(nremove, "testcase setup failure\n");
319 ppadd = __of_prop_dup(&padd, GFP_KERNEL);
320 selftest(ppadd, "testcase setup failure\n");
321 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
322 selftest(ppupdate, "testcase setup failure\n");
323 parent = nremove->parent;
324 n1->parent = parent;
325 n2->parent = parent;
326 n21->parent = n2;
327 n2->child = n21;
328 ppremove = of_find_property(parent, "prop-remove", NULL);
329 selftest(ppremove, "failed to find removal prop");
330
331 of_changeset_init(&chgset);
332 selftest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
333 selftest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
334 selftest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
335 selftest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
336 selftest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
337 selftest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
338 selftest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
339 mutex_lock(&of_mutex);
340 selftest(!of_changeset_apply(&chgset), "apply failed\n");
341 mutex_unlock(&of_mutex);
342
343 mutex_lock(&of_mutex);
344 selftest(!of_changeset_revert(&chgset), "revert failed\n");
345 mutex_unlock(&of_mutex);
346
347 of_changeset_destroy(&chgset);
348#endif
349}
350
269static void __init of_selftest_parse_interrupts(void) 351static void __init of_selftest_parse_interrupts(void)
270{ 352{
271 struct device_node *np; 353 struct device_node *np;
@@ -517,9 +599,156 @@ static void __init of_selftest_platform_populate(void)
517 } 599 }
518} 600}
519 601
602/**
603 * update_node_properties - adds the properties
604 * of np into dup node (present in live tree) and
605 * updates parent of children of np to dup.
606 *
607 * @np: node already present in live tree
608 * @dup: node present in live tree to be updated
609 */
610static void update_node_properties(struct device_node *np,
611 struct device_node *dup)
612{
613 struct property *prop;
614 struct device_node *child;
615
616 for_each_property_of_node(np, prop)
617 of_add_property(dup, prop);
618
619 for_each_child_of_node(np, child)
620 child->parent = dup;
621}
622
623/**
624 * attach_node_and_children - attaches nodes
625 * and its children to live tree
626 *
627 * @np: Node to attach to live tree
628 */
629static int attach_node_and_children(struct device_node *np)
630{
631 struct device_node *next, *root = np, *dup;
632
633 if (!np) {
634 pr_warn("%s: No tree to attach; not running tests\n",
635 __func__);
636 return -ENODATA;
637 }
638
639
640 /* skip root node */
641 np = np->child;
642 /* storing a copy in temporary node */
643 dup = np;
644
645 while (dup) {
646 nodes[last_node_index++] = dup;
647 dup = dup->sibling;
648 }
649 dup = NULL;
650
651 while (np) {
652 next = np->allnext;
653 dup = of_find_node_by_path(np->full_name);
654 if (dup)
655 update_node_properties(np, dup);
656 else {
657 np->child = NULL;
658 if (np->parent == root)
659 np->parent = of_allnodes;
660 of_attach_node(np);
661 }
662 np = next;
663 }
664
665 return 0;
666}
667
668/**
669 * selftest_data_add - Reads, copies data from
670 * linked tree and attaches it to the live tree
671 */
672static int __init selftest_data_add(void)
673{
674 void *selftest_data;
675 struct device_node *selftest_data_node;
676 extern uint8_t __dtb_testcases_begin[];
677 extern uint8_t __dtb_testcases_end[];
678 const int size = __dtb_testcases_end - __dtb_testcases_begin;
679
680 if (!size || !of_allnodes) {
681 pr_warn("%s: No testcase data to attach; not running tests\n",
682 __func__);
683 return -ENODATA;
684 }
685
686 /* creating copy */
687 selftest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
688
689 if (!selftest_data) {
690 pr_warn("%s: Failed to allocate memory for selftest_data; "
691 "not running tests\n", __func__);
692 return -ENOMEM;
693 }
694 of_fdt_unflatten_tree(selftest_data, &selftest_data_node);
695
696 /* attach the sub-tree to live tree */
697 return attach_node_and_children(selftest_data_node);
698}
699
700/**
701 * detach_node_and_children - detaches node
702 * and its children from live tree
703 *
704 * @np: Node to detach from live tree
705 */
706static void detach_node_and_children(struct device_node *np)
707{
708 while (np->child)
709 detach_node_and_children(np->child);
710
711 while (np->sibling)
712 detach_node_and_children(np->sibling);
713
714 of_detach_node(np);
715}
716
717/**
718 * selftest_data_remove - removes the selftest data
719 * nodes from the live tree
720 */
721static void selftest_data_remove(void)
722{
723 struct device_node *np;
724 struct property *prop;
725
726 while (last_node_index >= 0) {
727 if (nodes[last_node_index]) {
728 np = of_find_node_by_path(nodes[last_node_index]->full_name);
729 if (strcmp(np->full_name, "/aliases") != 0) {
730 detach_node_and_children(np->child);
731 of_detach_node(np);
732 } else {
733 for_each_property_of_node(np, prop) {
734 if (strcmp(prop->name, "testcase-alias") == 0)
735 of_remove_property(np, prop);
736 }
737 }
738 }
739 last_node_index--;
740 }
741}
742
520static int __init of_selftest(void) 743static int __init of_selftest(void)
521{ 744{
522 struct device_node *np; 745 struct device_node *np;
746 int res;
747
748 /* adding data for selftest */
749 res = selftest_data_add();
750 if (res)
751 return res;
523 752
524 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 753 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
525 if (!np) { 754 if (!np) {
@@ -533,12 +762,18 @@ static int __init of_selftest(void)
533 of_selftest_dynamic(); 762 of_selftest_dynamic();
534 of_selftest_parse_phandle_with_args(); 763 of_selftest_parse_phandle_with_args();
535 of_selftest_property_match_string(); 764 of_selftest_property_match_string();
765 of_selftest_property_copy();
766 of_selftest_changeset();
536 of_selftest_parse_interrupts(); 767 of_selftest_parse_interrupts();
537 of_selftest_parse_interrupts_extended(); 768 of_selftest_parse_interrupts_extended();
538 of_selftest_match_node(); 769 of_selftest_match_node();
539 of_selftest_platform_populate(); 770 of_selftest_platform_populate();
540 pr_info("end of selftest - %i passed, %i failed\n", 771 pr_info("end of selftest - %i passed, %i failed\n",
541 selftest_results.passed, selftest_results.failed); 772 selftest_results.passed, selftest_results.failed);
773
774 /* removing selftest data from live tree */
775 selftest_data_remove();
776
542 return 0; 777 return 0;
543} 778}
544late_initcall(of_selftest); 779late_initcall(of_selftest);
diff --git a/drivers/of/testcase-data/testcases.dts b/drivers/of/testcase-data/testcases.dts
new file mode 100644
index 000000000000..219ef9324e9c
--- /dev/null
+++ b/drivers/of/testcase-data/testcases.dts
@@ -0,0 +1,15 @@
1/dts-v1/;
2/ {
3 testcase-data {
4 changeset {
5 prop-update = "hello";
6 prop-remove = "world";
7 node-remove {
8 };
9 };
10 };
11};
12#include "tests-phandle.dtsi"
13#include "tests-interrupts.dtsi"
14#include "tests-match.dtsi"
15#include "tests-platform.dtsi"
diff --git a/drivers/of/testcase-data/testcases.dtsi b/drivers/of/testcase-data/testcases.dtsi
deleted file mode 100644
index 6d8d980ac858..000000000000
--- a/drivers/of/testcase-data/testcases.dtsi
+++ /dev/null
@@ -1,4 +0,0 @@
1#include "tests-phandle.dtsi"
2#include "tests-interrupts.dtsi"
3#include "tests-match.dtsi"
4#include "tests-platform.dtsi"
generated by cgit v1.2.2 (git 2.25.0) at 2026-05-27 20:37:00 -0400