tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Self tests for device tree subsystem
3 */
4
5#define pr_fmt(fmt) "### %s(): " fmt, __func__
6
7#include <linux/clk.h>
8#include <linux/err.h>
9#include <linux/errno.h>
10#include <linux/module.h>
11#include <linux/of.h>
12#include <linux/list.h>
13#include <linux/mutex.h>
14#include <linux/slab.h>
15#include <linux/device.h>
16
17static bool selftest_passed = true;
18#define selftest(result, fmt, ...) { \
19 selftest_passed &= (result); \
20 if (!(result)) \
21 pr_err("FAIL %s:%i " fmt, __FILE__, __LINE__, ##__VA_ARGS__); \
22}
23
24static void __init of_selftest_parse_phandle_with_args(void)
25{
26 struct device_node *np;
27 struct of_phandle_args args;
28 int rc, i;
29 bool passed_all = true;
30
31 pr_info("start\n");
32 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
33 if (!np) {
34 pr_err("missing testcase data\n");
35 return;
36 }
37
38 for (i = 0; i < 7; i++) {
39 bool passed = true;
40 rc = of_parse_phandle_with_args(np, "phandle-list",
41 "#phandle-cells", i, &args);
42
43 /* Test the values from tests-phandle.dtsi */
44 switch (i) {
45 case 0:
46 passed &= !rc;
47 passed &= (args.args_count == 1);
48 passed &= (args.args[0] == (i + 1));
49 break;
50 case 1:
51 passed &= !rc;
52 passed &= (args.args_count == 2);
53 passed &= (args.args[0] == (i + 1));
54 passed &= (args.args[1] == 0);
55 break;
56 case 2:
57 passed &= (rc == -ENOENT);
58 break;
59 case 3:
60 passed &= !rc;
61 passed &= (args.args_count == 3);
62 passed &= (args.args[0] == (i + 1));
63 passed &= (args.args[1] == 4);
64 passed &= (args.args[2] == 3);
65 break;
66 case 4:
67 passed &= !rc;
68 passed &= (args.args_count == 2);
69 passed &= (args.args[0] == (i + 1));
70 passed &= (args.args[1] == 100);
71 break;
72 case 5:
73 passed &= !rc;
74 passed &= (args.args_count == 0);
75 break;
76 case 6:
77 passed &= !rc;
78 passed &= (args.args_count == 1);
79 passed &= (args.args[0] == (i + 1));
80 break;
81 case 7:
82 passed &= (rc == -EINVAL);
83 break;
84 default:
85 passed = false;
86 }
87
88 if (!passed) {
89 int j;
90 pr_err("index %i - data error on node %s rc=%i regs=[",
91 i, args.np->full_name, rc);
92 for (j = 0; j < args.args_count; j++)
93 printk(" %i", args.args[j]);
94 printk(" ]\n");
95
96 passed_all = false;
97 }
98 }
99
100 /* Check for missing list property */
101 rc = of_parse_phandle_with_args(np, "phandle-list-missing",
102 "#phandle-cells", 0, &args);
103 passed_all &= (rc == -EINVAL);
104
105 /* Check for missing cells property */
106 rc = of_parse_phandle_with_args(np, "phandle-list",
107 "#phandle-cells-missing", 0, &args);
108 passed_all &= (rc == -EINVAL);
109
110 /* Check for bad phandle in list */
111 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
112 "#phandle-cells", 0, &args);
113 passed_all &= (rc == -EINVAL);
114
115 /* Check for incorrectly formed argument list */
116 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
117 "#phandle-cells", 1, &args);
118 passed_all &= (rc == -EINVAL);
119
120 pr_info("end - %s\n", passed_all ? "PASS" : "FAIL");
121}
122
123static void __init of_selftest_property_match_string(void)
124{
125 struct device_node *np;
126 int rc;
127
128 pr_info("start\n");
129 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
130 if (!np) {
131 pr_err("No testcase data in device tree\n");
132 return;
133 }
134
135 rc = of_property_match_string(np, "phandle-list-names", "first");
136 selftest(rc == 0, "first expected:0 got:%i\n", rc);
137 rc = of_property_match_string(np, "phandle-list-names", "second");
138 selftest(rc == 1, "second expected:0 got:%i\n", rc);
139 rc = of_property_match_string(np, "phandle-list-names", "third");
140 selftest(rc == 2, "third expected:0 got:%i\n", rc);
141 rc = of_property_match_string(np, "phandle-list-names", "fourth");
142 selftest(rc == -ENODATA, "unmatched string; rc=%i", rc);
143 rc = of_property_match_string(np, "missing-property", "blah");
144 selftest(rc == -EINVAL, "missing property; rc=%i", rc);
145 rc = of_property_match_string(np, "empty-property", "blah");
146 selftest(rc == -ENODATA, "empty property; rc=%i", rc);
147 rc = of_property_match_string(np, "unterminated-string", "blah");
148 selftest(rc == -EILSEQ, "unterminated string; rc=%i", rc);
149}
150
151static int __init of_selftest(void)
152{
153 struct device_node *np;
154
155 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
156 if (!np) {
157 pr_info("No testcase data in device tree; not running tests\n");
158 return 0;
159 }
160 of_node_put(np);
161
162 pr_info("start of selftest - you will see error messages\n");
163 of_selftest_parse_phandle_with_args();
164 of_selftest_property_match_string();
165 pr_info("end of selftest - %s\n", selftest_passed ? "PASS" : "FAIL");
166 return 0;
167}
168late_initcall(of_selftest);