2 * Self tests for device tree subsystem
5 #define pr_fmt(fmt) "### dt-test ### " fmt
9 #include <linux/errno.h>
10 #include <linux/module.h>
12 #include <linux/list.h>
13 #include <linux/mutex.h>
14 #include <linux/slab.h>
15 #include <linux/device.h>
17 static bool selftest_passed
= true;
18 #define selftest(result, fmt, ...) { \
20 pr_err("FAIL %s:%i " fmt, __FILE__, __LINE__, ##__VA_ARGS__); \
21 selftest_passed = false; \
23 pr_info("pass %s:%i\n", __FILE__, __LINE__); \
27 static void __init
of_selftest_parse_phandle_with_args(void)
29 struct device_node
*np
;
30 struct of_phandle_args args
;
33 np
= of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
35 pr_err("missing testcase data\n");
39 rc
= of_count_phandle_with_args(np
, "phandle-list", "#phandle-cells");
40 selftest(rc
== 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc
);
42 for (i
= 0; i
< 8; i
++) {
44 rc
= of_parse_phandle_with_args(np
, "phandle-list",
45 "#phandle-cells", i
, &args
);
47 /* Test the values from tests-phandle.dtsi */
51 passed
&= (args
.args_count
== 1);
52 passed
&= (args
.args
[0] == (i
+ 1));
56 passed
&= (args
.args_count
== 2);
57 passed
&= (args
.args
[0] == (i
+ 1));
58 passed
&= (args
.args
[1] == 0);
61 passed
&= (rc
== -ENOENT
);
65 passed
&= (args
.args_count
== 3);
66 passed
&= (args
.args
[0] == (i
+ 1));
67 passed
&= (args
.args
[1] == 4);
68 passed
&= (args
.args
[2] == 3);
72 passed
&= (args
.args_count
== 2);
73 passed
&= (args
.args
[0] == (i
+ 1));
74 passed
&= (args
.args
[1] == 100);
78 passed
&= (args
.args_count
== 0);
82 passed
&= (args
.args_count
== 1);
83 passed
&= (args
.args
[0] == (i
+ 1));
86 passed
&= (rc
== -ENOENT
);
92 selftest(passed
, "index %i - data error on node %s rc=%i\n",
93 i
, args
.np
->full_name
, rc
);
96 /* Check for missing list property */
97 rc
= of_parse_phandle_with_args(np
, "phandle-list-missing",
98 "#phandle-cells", 0, &args
);
99 selftest(rc
== -ENOENT
, "expected:%i got:%i\n", -ENOENT
, rc
);
100 rc
= of_count_phandle_with_args(np
, "phandle-list-missing",
102 selftest(rc
== -ENOENT
, "expected:%i got:%i\n", -ENOENT
, rc
);
104 /* Check for missing cells property */
105 rc
= of_parse_phandle_with_args(np
, "phandle-list",
106 "#phandle-cells-missing", 0, &args
);
107 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
108 rc
= of_count_phandle_with_args(np
, "phandle-list",
109 "#phandle-cells-missing");
110 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
112 /* Check for bad phandle in list */
113 rc
= of_parse_phandle_with_args(np
, "phandle-list-bad-phandle",
114 "#phandle-cells", 0, &args
);
115 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
116 rc
= of_count_phandle_with_args(np
, "phandle-list-bad-phandle",
118 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
120 /* Check for incorrectly formed argument list */
121 rc
= of_parse_phandle_with_args(np
, "phandle-list-bad-args",
122 "#phandle-cells", 1, &args
);
123 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
124 rc
= of_count_phandle_with_args(np
, "phandle-list-bad-args",
126 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
129 static void __init
of_selftest_property_match_string(void)
131 struct device_node
*np
;
135 np
= of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
137 pr_err("No testcase data in device tree\n");
141 rc
= of_property_match_string(np
, "phandle-list-names", "first");
142 selftest(rc
== 0, "first expected:0 got:%i\n", rc
);
143 rc
= of_property_match_string(np
, "phandle-list-names", "second");
144 selftest(rc
== 1, "second expected:0 got:%i\n", rc
);
145 rc
= of_property_match_string(np
, "phandle-list-names", "third");
146 selftest(rc
== 2, "third expected:0 got:%i\n", rc
);
147 rc
= of_property_match_string(np
, "phandle-list-names", "fourth");
148 selftest(rc
== -ENODATA
, "unmatched string; rc=%i", rc
);
149 rc
= of_property_match_string(np
, "missing-property", "blah");
150 selftest(rc
== -EINVAL
, "missing property; rc=%i", rc
);
151 rc
= of_property_match_string(np
, "empty-property", "blah");
152 selftest(rc
== -ENODATA
, "empty property; rc=%i", rc
);
153 rc
= of_property_match_string(np
, "unterminated-string", "blah");
154 selftest(rc
== -EILSEQ
, "unterminated string; rc=%i", rc
);
157 static int __init
of_selftest(void)
159 struct device_node
*np
;
161 np
= of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
163 pr_info("No testcase data in device tree; not running tests\n");
168 pr_info("start of selftest - you will see error messages\n");
169 of_selftest_parse_phandle_with_args();
170 of_selftest_property_match_string();
171 pr_info("end of selftest - %s\n", selftest_passed
? "PASS" : "FAIL");
174 late_initcall(of_selftest
);
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