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unittest.c
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/*
* Self tests for device tree subsystem
*/
#define pr_fmt(fmt) "### dt-test ### " fmt
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/hashtable.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_fdt.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/of_platform.h>
#include <linux/i2c.h>
#include <linux/i2c-mux.h>
#include "of_private.h"
static struct selftest_results {
int passed;
int failed;
} selftest_results;
#define selftest(result, fmt, ...) ({ \
bool failed = !(result); \
if (failed) { \
selftest_results.failed++; \
pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
} else { \
selftest_results.passed++; \
pr_debug("pass %s():%i\n", __func__, __LINE__); \
} \
failed; \
})
static void __init of_selftest_find_node_by_name(void)
{
struct device_node *np;
const char *options;
np = of_find_node_by_path("/testcase-data");
selftest(np && !strcmp("/testcase-data", np->full_name),
"find /testcase-data failed\n");
of_node_put(np);
/* Test if trailing '/' works */
np = of_find_node_by_path("/testcase-data/");
selftest(!np, "trailing '/' on /testcase-data/ should fail\n");
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
"find /testcase-data/phandle-tests/consumer-a failed\n");
of_node_put(np);
np = of_find_node_by_path("testcase-alias");
selftest(np && !strcmp("/testcase-data", np->full_name),
"find testcase-alias failed\n");
of_node_put(np);
/* Test if trailing '/' works on aliases */
np = of_find_node_by_path("testcase-alias/");
selftest(!np, "trailing '/' on testcase-alias/ should fail\n");
np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
"find testcase-alias/phandle-tests/consumer-a failed\n");
of_node_put(np);
np = of_find_node_by_path("/testcase-data/missing-path");
selftest(!np, "non-existent path returned node %s\n", np->full_name);
of_node_put(np);
np = of_find_node_by_path("missing-alias");
selftest(!np, "non-existent alias returned node %s\n", np->full_name);
of_node_put(np);
np = of_find_node_by_path("testcase-alias/missing-path");
selftest(!np, "non-existent alias with relative path returned node %s\n", np->full_name);
of_node_put(np);
np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
selftest(np && !strcmp("testoption", options),
"option path test failed\n");
of_node_put(np);
np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
selftest(np, "NULL option path test failed\n");
of_node_put(np);
np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
&options);
selftest(np && !strcmp("testaliasoption", options),
"option alias path test failed\n");
of_node_put(np);
np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
selftest(np, "NULL option alias path test failed\n");
of_node_put(np);
options = "testoption";
np = of_find_node_opts_by_path("testcase-alias", &options);
selftest(np && !options, "option clearing test failed\n");
of_node_put(np);
options = "testoption";
np = of_find_node_opts_by_path("/", &options);
selftest(np && !options, "option clearing root node test failed\n");
of_node_put(np);
}
static void __init of_selftest_dynamic(void)
{
struct device_node *np;
struct property *prop;
np = of_find_node_by_path("/testcase-data");
if (!np) {
pr_err("missing testcase data\n");
return;
}
/* Array of 4 properties for the purpose of testing */
prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
if (!prop) {
selftest(0, "kzalloc() failed\n");
return;
}
/* Add a new property - should pass*/
prop->name = "new-property";
prop->value = "new-property-data";
prop->length = strlen(prop->value);
selftest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
/* Try to add an existing property - should fail */
prop++;
prop->name = "new-property";
prop->value = "new-property-data-should-fail";
prop->length = strlen(prop->value);
selftest(of_add_property(np, prop) != 0,
"Adding an existing property should have failed\n");
/* Try to modify an existing property - should pass */
prop->value = "modify-property-data-should-pass";
prop->length = strlen(prop->value);
selftest(of_update_property(np, prop) == 0,
"Updating an existing property should have passed\n");
/* Try to modify non-existent property - should pass*/
prop++;
prop->name = "modify-property";
prop->value = "modify-missing-property-data-should-pass";
prop->length = strlen(prop->value);
selftest(of_update_property(np, prop) == 0,
"Updating a missing property should have passed\n");
/* Remove property - should pass */
selftest(of_remove_property(np, prop) == 0,
"Removing a property should have passed\n");
/* Adding very large property - should pass */
prop++;
prop->name = "large-property-PAGE_SIZEx8";
prop->length = PAGE_SIZE * 8;
prop->value = kzalloc(prop->length, GFP_KERNEL);
selftest(prop->value != NULL, "Unable to allocate large buffer\n");
if (prop->value)
selftest(of_add_property(np, prop) == 0,
"Adding a large property should have passed\n");
}
static int __init of_selftest_check_node_linkage(struct device_node *np)
{
struct device_node *child;
int count = 0, rc;
for_each_child_of_node(np, child) {
if (child->parent != np) {
pr_err("Child node %s links to wrong parent %s\n",
child->name, np->name);
return -EINVAL;
}
rc = of_selftest_check_node_linkage(child);
if (rc < 0)
return rc;
count += rc;
}
return count + 1;
}
static void __init of_selftest_check_tree_linkage(void)
{
struct device_node *np;
int allnode_count = 0, child_count;
if (!of_root)
return;
for_each_of_allnodes(np)
allnode_count++;
child_count = of_selftest_check_node_linkage(of_root);
selftest(child_count > 0, "Device node data structure is corrupted\n");
selftest(child_count == allnode_count, "allnodes list size (%i) doesn't match"
"sibling lists size (%i)\n", allnode_count, child_count);
pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
}
struct node_hash {
struct hlist_node node;
struct device_node *np;
};
static DEFINE_HASHTABLE(phandle_ht, 8);
static void __init of_selftest_check_phandles(void)
{
struct device_node *np;
struct node_hash *nh;
struct hlist_node *tmp;
int i, dup_count = 0, phandle_count = 0;
for_each_of_allnodes(np) {
if (!np->phandle)
continue;
hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
if (nh->np->phandle == np->phandle) {
pr_info("Duplicate phandle! %i used by %s and %s\n",
np->phandle, nh->np->full_name, np->full_name);
dup_count++;
break;
}
}
nh = kzalloc(sizeof(*nh), GFP_KERNEL);
if (WARN_ON(!nh))
return;
nh->np = np;
hash_add(phandle_ht, &nh->node, np->phandle);
phandle_count++;
}
selftest(dup_count == 0, "Found %i duplicates in %i phandles\n",
dup_count, phandle_count);
/* Clean up */
hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
hash_del(&nh->node);
kfree(nh);
}
}
static void __init of_selftest_parse_phandle_with_args(void)
{
struct device_node *np;
struct of_phandle_args args;
int i, rc;
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
if (!np) {
pr_err("missing testcase data\n");
return;
}
rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
selftest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
for (i = 0; i < 8; i++) {
bool passed = true;
rc = of_parse_phandle_with_args(np, "phandle-list",
"#phandle-cells", i, &args);
/* Test the values from tests-phandle.dtsi */
switch (i) {
case 0:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == (i + 1));
break;
case 1:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == (i + 1));
passed &= (args.args[1] == 0);
break;
case 2:
passed &= (rc == -ENOENT);
break;
case 3:
passed &= !rc;
passed &= (args.args_count == 3);
passed &= (args.args[0] == (i + 1));
passed &= (args.args[1] == 4);
passed &= (args.args[2] == 3);
break;
case 4:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == (i + 1));
passed &= (args.args[1] == 100);
break;
case 5:
passed &= !rc;
passed &= (args.args_count == 0);
break;
case 6:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == (i + 1));
break;
case 7:
passed &= (rc == -ENOENT);
break;
default:
passed = false;
}
selftest(passed, "index %i - data error on node %s rc=%i\n",
i, args.np->full_name, rc);
}
/* Check for missing list property */
rc = of_parse_phandle_with_args(np, "phandle-list-missing",
"#phandle-cells", 0, &args);
selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
rc = of_count_phandle_with_args(np, "phandle-list-missing",
"#phandle-cells");
selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
/* Check for missing cells property */
rc = of_parse_phandle_with_args(np, "phandle-list",
"#phandle-cells-missing", 0, &args);
selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
rc = of_count_phandle_with_args(np, "phandle-list",
"#phandle-cells-missing");
selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
/* Check for bad phandle in list */
rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
"#phandle-cells", 0, &args);
selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
"#phandle-cells");
selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
/* Check for incorrectly formed argument list */
rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
"#phandle-cells", 1, &args);
selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
"#phandle-cells");
selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
}
static void __init of_selftest_property_string(void)
{
const char *strings[4];
struct device_node *np;
int rc;
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
if (!np) {
pr_err("No testcase data in device tree\n");
return;
}
rc = of_property_match_string(np, "phandle-list-names", "first");
selftest(rc == 0, "first expected:0 got:%i\n", rc);
rc = of_property_match_string(np, "phandle-list-names", "second");
selftest(rc == 1, "second expected:0 got:%i\n", rc);
rc = of_property_match_string(np, "phandle-list-names", "third");
selftest(rc == 2, "third expected:0 got:%i\n", rc);
rc = of_property_match_string(np, "phandle-list-names", "fourth");
selftest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
rc = of_property_match_string(np, "missing-property", "blah");
selftest(rc == -EINVAL, "missing property; rc=%i\n", rc);
rc = of_property_match_string(np, "empty-property", "blah");
selftest(rc == -ENODATA, "empty property; rc=%i\n", rc);
rc = of_property_match_string(np, "unterminated-string", "blah");
selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
/* of_property_count_strings() tests */
rc = of_property_count_strings(np, "string-property");
selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
rc = of_property_count_strings(np, "phandle-list-names");
selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
rc = of_property_count_strings(np, "unterminated-string");
selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
rc = of_property_count_strings(np, "unterminated-string-list");
selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
/* of_property_read_string_index() tests */
rc = of_property_read_string_index(np, "string-property", 0, strings);
selftest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
strings[0] = NULL;
rc = of_property_read_string_index(np, "string-property", 1, strings);
selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
selftest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
selftest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
strings[0] = NULL;
rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
strings[0] = NULL;
rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
strings[0] = NULL;
rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
strings[1] = NULL;
/* of_property_read_string_array() tests */
rc = of_property_read_string_array(np, "string-property", strings, 4);
selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
/* -- An incorrectly formed string should cause a failure */
rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
/* -- parsing the correctly formed strings should still work: */
strings[2] = NULL;
rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
selftest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
strings[1] = NULL;
rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
selftest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
}
#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
(p1)->value && (p2)->value && \
!memcmp((p1)->value, (p2)->value, (p1)->length) && \
!strcmp((p1)->name, (p2)->name))
static void __init of_selftest_property_copy(void)
{
#ifdef CONFIG_OF_DYNAMIC
struct property p1 = { .name = "p1", .length = 0, .value = "" };
struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
struct property *new;
new = __of_prop_dup(&p1, GFP_KERNEL);
selftest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
kfree(new->value);
kfree(new->name);
kfree(new);
new = __of_prop_dup(&p2, GFP_KERNEL);
selftest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
kfree(new->value);
kfree(new->name);
kfree(new);
#endif
}
static void __init of_selftest_changeset(void)
{
#ifdef CONFIG_OF_DYNAMIC
struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
struct property *ppremove;
struct device_node *n1, *n2, *n21, *nremove, *parent, *np;
struct of_changeset chgset;
of_changeset_init(&chgset);
n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1");
selftest(n1, "testcase setup failure\n");
n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2");
selftest(n2, "testcase setup failure\n");
n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21");
selftest(n21, "testcase setup failure %p\n", n21);
nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
selftest(nremove, "testcase setup failure\n");
ppadd = __of_prop_dup(&padd, GFP_KERNEL);
selftest(ppadd, "testcase setup failure\n");
ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
selftest(ppupdate, "testcase setup failure\n");
parent = nremove->parent;
n1->parent = parent;
n2->parent = parent;
n21->parent = n2;
n2->child = n21;
ppremove = of_find_property(parent, "prop-remove", NULL);
selftest(ppremove, "failed to find removal prop");
of_changeset_init(&chgset);
selftest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
selftest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
selftest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
selftest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
selftest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
selftest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
selftest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
mutex_lock(&of_mutex);
selftest(!of_changeset_apply(&chgset), "apply failed\n");
mutex_unlock(&of_mutex);
/* Make sure node names are constructed correctly */
selftest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
"'%s' not added\n", n21->full_name);
of_node_put(np);
mutex_lock(&of_mutex);
selftest(!of_changeset_revert(&chgset), "revert failed\n");
mutex_unlock(&of_mutex);
of_changeset_destroy(&chgset);
#endif
}
static void __init of_selftest_parse_interrupts(void)
{
struct device_node *np;
struct of_phandle_args args;
int i, rc;
np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
if (!np) {
pr_err("missing testcase data\n");
return;
}
for (i = 0; i < 4; i++) {
bool passed = true;
args.args_count = 0;
rc = of_irq_parse_one(np, i, &args);
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == (i + 1));
selftest(passed, "index %i - data error on node %s rc=%i\n",
i, args.np->full_name, rc);
}
of_node_put(np);
np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
if (!np) {
pr_err("missing testcase data\n");
return;
}
for (i = 0; i < 4; i++) {
bool passed = true;
args.args_count = 0;
rc = of_irq_parse_one(np, i, &args);
/* Test the values from tests-phandle.dtsi */
switch (i) {
case 0:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == 9);
break;
case 1:
passed &= !rc;
passed &= (args.args_count == 3);
passed &= (args.args[0] == 10);
passed &= (args.args[1] == 11);
passed &= (args.args[2] == 12);
break;
case 2:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == 13);
passed &= (args.args[1] == 14);
break;
case 3:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == 15);
passed &= (args.args[1] == 16);
break;
default:
passed = false;
}
selftest(passed, "index %i - data error on node %s rc=%i\n",
i, args.np->full_name, rc);
}
of_node_put(np);
}
static void __init of_selftest_parse_interrupts_extended(void)
{
struct device_node *np;
struct of_phandle_args args;
int i, rc;
np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
if (!np) {
pr_err("missing testcase data\n");
return;
}
for (i = 0; i < 7; i++) {
bool passed = true;
rc = of_irq_parse_one(np, i, &args);
/* Test the values from tests-phandle.dtsi */
switch (i) {
case 0:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == 1);
break;
case 1:
passed &= !rc;
passed &= (args.args_count == 3);
passed &= (args.args[0] == 2);
passed &= (args.args[1] == 3);
passed &= (args.args[2] == 4);
break;
case 2:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == 5);
passed &= (args.args[1] == 6);
break;
case 3:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == 9);
break;
case 4:
passed &= !rc;
passed &= (args.args_count == 3);
passed &= (args.args[0] == 10);
passed &= (args.args[1] == 11);
passed &= (args.args[2] == 12);
break;
case 5:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == 13);
passed &= (args.args[1] == 14);
break;
case 6:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == 15);
break;
default:
passed = false;
}
selftest(passed, "index %i - data error on node %s rc=%i\n",
i, args.np->full_name, rc);
}
of_node_put(np);
}
static struct of_device_id match_node_table[] = {
{ .data = "A", .name = "name0", }, /* Name alone is lowest priority */
{ .data = "B", .type = "type1", }, /* followed by type alone */
{ .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
{ .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
{ .data = "Cc", .name = "name2", .type = "type2", },
{ .data = "E", .compatible = "compat3" },
{ .data = "G", .compatible = "compat2", },
{ .data = "H", .compatible = "compat2", .name = "name5", },
{ .data = "I", .compatible = "compat2", .type = "type1", },
{ .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
{ .data = "K", .compatible = "compat2", .name = "name9", },
{}
};
static struct {
const char *path;
const char *data;
} match_node_tests[] = {
{ .path = "/testcase-data/match-node/name0", .data = "A", },
{ .path = "/testcase-data/match-node/name1", .data = "B", },
{ .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
{ .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
{ .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
{ .path = "/testcase-data/match-node/name3", .data = "E", },
{ .path = "/testcase-data/match-node/name4", .data = "G", },
{ .path = "/testcase-data/match-node/name5", .data = "H", },
{ .path = "/testcase-data/match-node/name6", .data = "G", },
{ .path = "/testcase-data/match-node/name7", .data = "I", },
{ .path = "/testcase-data/match-node/name8", .data = "J", },
{ .path = "/testcase-data/match-node/name9", .data = "K", },
};
static void __init of_selftest_match_node(void)
{
struct device_node *np;
const struct of_device_id *match;
int i;
for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
np = of_find_node_by_path(match_node_tests[i].path);
if (!np) {
selftest(0, "missing testcase node %s\n",
match_node_tests[i].path);
continue;
}
match = of_match_node(match_node_table, np);
if (!match) {
selftest(0, "%s didn't match anything\n",
match_node_tests[i].path);
continue;
}
if (strcmp(match->data, match_node_tests[i].data) != 0) {
selftest(0, "%s got wrong match. expected %s, got %s\n",
match_node_tests[i].path, match_node_tests[i].data,
(const char *)match->data);
continue;
}
selftest(1, "passed");
}
}
struct device test_bus = {
.init_name = "unittest-bus",
};
static void __init of_selftest_platform_populate(void)
{
int irq, rc;
struct device_node *np, *child, *grandchild;
struct platform_device *pdev;
struct of_device_id match[] = {
{ .compatible = "test-device", },
{}
};
np = of_find_node_by_path("/testcase-data");
of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
/* Test that a missing irq domain returns -EPROBE_DEFER */
np = of_find_node_by_path("/testcase-data/testcase-device1");
pdev = of_find_device_by_node(np);
selftest(pdev, "device 1 creation failed\n");
irq = platform_get_irq(pdev, 0);
selftest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
/* Test that a parsing failure does not return -EPROBE_DEFER */
np = of_find_node_by_path("/testcase-data/testcase-device2");
pdev = of_find_device_by_node(np);
selftest(pdev, "device 2 creation failed\n");
irq = platform_get_irq(pdev, 0);
selftest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
if (selftest(np = of_find_node_by_path("/testcase-data/platform-tests"),
"No testcase data in device tree\n"));
return;
if (selftest(!(rc = device_register(&test_bus)),
"testbus registration failed; rc=%i\n", rc));
return;
for_each_child_of_node(np, child) {
of_platform_populate(child, match, NULL, &test_bus);
for_each_child_of_node(child, grandchild)
selftest(of_find_device_by_node(grandchild),
"Could not create device for node '%s'\n",
grandchild->name);
}
of_platform_depopulate(&test_bus);
for_each_child_of_node(np, child) {
for_each_child_of_node(child, grandchild)
selftest(!of_find_device_by_node(grandchild),
"device didn't get destroyed '%s'\n",
grandchild->name);
}
device_unregister(&test_bus);
of_node_put(np);
}
/**
* update_node_properties - adds the properties
* of np into dup node (present in live tree) and
* updates parent of children of np to dup.
*
* @np: node already present in live tree
* @dup: node present in live tree to be updated
*/
static void update_node_properties(struct device_node *np,
struct device_node *dup)
{
struct property *prop;
struct device_node *child;
for_each_property_of_node(np, prop)
of_add_property(dup, prop);
for_each_child_of_node(np, child)
child->parent = dup;
}
/**
* attach_node_and_children - attaches nodes
* and its children to live tree
*
* @np: Node to attach to live tree
*/
static int attach_node_and_children(struct device_node *np)
{
struct device_node *next, *dup, *child;
unsigned long flags;
dup = of_find_node_by_path(np->full_name);
if (dup) {
update_node_properties(np, dup);
return 0;
}
child = np->child;
np->child = NULL;
mutex_lock(&of_mutex);
raw_spin_lock_irqsave(&devtree_lock, flags);
np->sibling = np->parent->child;
np->parent->child = np;
of_node_clear_flag(np, OF_DETACHED);
raw_spin_unlock_irqrestore(&devtree_lock, flags);
__of_attach_node_sysfs(np);
mutex_unlock(&of_mutex);
while (child) {
next = child->sibling;
attach_node_and_children(child);
child = next;
}
return 0;
}
/**
* selftest_data_add - Reads, copies data from
* linked tree and attaches it to the live tree
*/
static int __init selftest_data_add(void)
{
void *selftest_data;
struct device_node *selftest_data_node, *np;
extern uint8_t __dtb_testcases_begin[];
extern uint8_t __dtb_testcases_end[];
const int size = __dtb_testcases_end - __dtb_testcases_begin;
int rc;
if (!size) {
pr_warn("%s: No testcase data to attach; not running tests\n",
__func__);
return -ENODATA;
}
/* creating copy */
selftest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
if (!selftest_data) {
pr_warn("%s: Failed to allocate memory for selftest_data; "
"not running tests\n", __func__);
return -ENOMEM;
}
of_fdt_unflatten_tree(selftest_data, &selftest_data_node);
if (!selftest_data_node) {
pr_warn("%s: No tree to attach; not running tests\n", __func__);
return -ENODATA;
}
of_node_set_flag(selftest_data_node, OF_DETACHED);
rc = of_resolve_phandles(selftest_data_node);
if (rc) {
pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
return -EINVAL;
}
if (!of_root) {
of_root = selftest_data_node;
for_each_of_allnodes(np)
__of_attach_node_sysfs(np);
of_aliases = of_find_node_by_path("/aliases");
of_chosen = of_find_node_by_path("/chosen");
return 0;
}
/* attach the sub-tree to live tree */
np = selftest_data_node->child;
while (np) {
struct device_node *next = np->sibling;
np->parent = of_root;
attach_node_and_children(np);
np = next;
}
return 0;
}
#ifdef CONFIG_OF_OVERLAY
static int selftest_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
if (np == NULL) {
dev_err(dev, "No OF data for device\n");
return -EINVAL;
}
dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
of_platform_populate(np, NULL, NULL, &pdev->dev);
return 0;
}
static int selftest_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
return 0;
}
static struct of_device_id selftest_match[] = {
{ .compatible = "selftest", },
{},
};
static struct platform_driver selftest_driver = {
.probe = selftest_probe,
.remove = selftest_remove,
.driver = {
.name = "selftest",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(selftest_match),
},
};
/* get the platform device instantiated at the path */
static struct platform_device *of_path_to_platform_device(const char *path)
{
struct device_node *np;
struct platform_device *pdev;
np = of_find_node_by_path(path);
if (np == NULL)
return NULL;
pdev = of_find_device_by_node(np);
of_node_put(np);
return pdev;
}
/* find out if a platform device exists at that path */
static int of_path_platform_device_exists(const char *path)
{
struct platform_device *pdev;
pdev = of_path_to_platform_device(path);
platform_device_put(pdev);
return pdev != NULL;
}
#if IS_ENABLED(CONFIG_I2C)
/* get the i2c client device instantiated at the path */
static struct i2c_client *of_path_to_i2c_client(const char *path)
{
struct device_node *np;
struct i2c_client *client;
np = of_find_node_by_path(path);
if (np == NULL)
return NULL;
client = of_find_i2c_device_by_node(np);
of_node_put(np);
return client;
}
/* find out if a i2c client device exists at that path */