324 lines
8.4 KiB
C
324 lines
8.4 KiB
C
/*
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* Self tests for device tree subsystem
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*/
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#define pr_fmt(fmt) "### dt-test ### " fmt
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_irq.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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static struct selftest_results {
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int passed;
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int failed;
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} selftest_results;
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#define selftest(result, fmt, ...) { \
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if (!(result)) { \
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selftest_results.failed++; \
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pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
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} else { \
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selftest_results.passed++; \
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pr_debug("pass %s():%i\n", __func__, __LINE__); \
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} \
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}
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static void __init of_selftest_parse_phandle_with_args(void)
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{
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struct device_node *np;
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struct of_phandle_args args;
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int i, rc;
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np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
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if (!np) {
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pr_err("missing testcase data\n");
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return;
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}
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rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
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selftest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
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for (i = 0; i < 8; i++) {
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bool passed = true;
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rc = of_parse_phandle_with_args(np, "phandle-list",
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"#phandle-cells", i, &args);
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/* Test the values from tests-phandle.dtsi */
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switch (i) {
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case 0:
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passed &= !rc;
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passed &= (args.args_count == 1);
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passed &= (args.args[0] == (i + 1));
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break;
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case 1:
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passed &= !rc;
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passed &= (args.args_count == 2);
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passed &= (args.args[0] == (i + 1));
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passed &= (args.args[1] == 0);
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break;
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case 2:
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passed &= (rc == -ENOENT);
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break;
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case 3:
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passed &= !rc;
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passed &= (args.args_count == 3);
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passed &= (args.args[0] == (i + 1));
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passed &= (args.args[1] == 4);
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passed &= (args.args[2] == 3);
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break;
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case 4:
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passed &= !rc;
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passed &= (args.args_count == 2);
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passed &= (args.args[0] == (i + 1));
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passed &= (args.args[1] == 100);
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break;
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case 5:
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passed &= !rc;
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passed &= (args.args_count == 0);
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break;
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case 6:
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passed &= !rc;
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passed &= (args.args_count == 1);
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passed &= (args.args[0] == (i + 1));
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break;
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case 7:
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passed &= (rc == -ENOENT);
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break;
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default:
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passed = false;
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}
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selftest(passed, "index %i - data error on node %s rc=%i\n",
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i, args.np->full_name, rc);
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}
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/* Check for missing list property */
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rc = of_parse_phandle_with_args(np, "phandle-list-missing",
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"#phandle-cells", 0, &args);
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selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
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rc = of_count_phandle_with_args(np, "phandle-list-missing",
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"#phandle-cells");
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selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
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/* Check for missing cells property */
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rc = of_parse_phandle_with_args(np, "phandle-list",
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"#phandle-cells-missing", 0, &args);
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selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
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rc = of_count_phandle_with_args(np, "phandle-list",
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"#phandle-cells-missing");
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selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
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/* Check for bad phandle in list */
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rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
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"#phandle-cells", 0, &args);
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selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
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rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
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"#phandle-cells");
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selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
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/* Check for incorrectly formed argument list */
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rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
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"#phandle-cells", 1, &args);
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selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
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rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
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"#phandle-cells");
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selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
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}
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static void __init of_selftest_property_match_string(void)
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{
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struct device_node *np;
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int rc;
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np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
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if (!np) {
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pr_err("No testcase data in device tree\n");
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return;
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}
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rc = of_property_match_string(np, "phandle-list-names", "first");
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selftest(rc == 0, "first expected:0 got:%i\n", rc);
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rc = of_property_match_string(np, "phandle-list-names", "second");
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selftest(rc == 1, "second expected:0 got:%i\n", rc);
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rc = of_property_match_string(np, "phandle-list-names", "third");
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selftest(rc == 2, "third expected:0 got:%i\n", rc);
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rc = of_property_match_string(np, "phandle-list-names", "fourth");
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selftest(rc == -ENODATA, "unmatched string; rc=%i", rc);
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rc = of_property_match_string(np, "missing-property", "blah");
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selftest(rc == -EINVAL, "missing property; rc=%i", rc);
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rc = of_property_match_string(np, "empty-property", "blah");
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selftest(rc == -ENODATA, "empty property; rc=%i", rc);
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rc = of_property_match_string(np, "unterminated-string", "blah");
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selftest(rc == -EILSEQ, "unterminated string; rc=%i", rc);
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}
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static void __init of_selftest_parse_interrupts(void)
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{
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struct device_node *np;
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struct of_phandle_args args;
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int i, rc;
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np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
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if (!np) {
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pr_err("missing testcase data\n");
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return;
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}
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for (i = 0; i < 4; i++) {
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bool passed = true;
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args.args_count = 0;
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rc = of_irq_parse_one(np, i, &args);
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passed &= !rc;
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passed &= (args.args_count == 1);
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passed &= (args.args[0] == (i + 1));
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selftest(passed, "index %i - data error on node %s rc=%i\n",
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i, args.np->full_name, rc);
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}
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of_node_put(np);
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np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
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if (!np) {
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pr_err("missing testcase data\n");
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return;
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}
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for (i = 0; i < 4; i++) {
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bool passed = true;
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args.args_count = 0;
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rc = of_irq_parse_one(np, i, &args);
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/* Test the values from tests-phandle.dtsi */
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switch (i) {
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case 0:
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passed &= !rc;
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passed &= (args.args_count == 1);
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passed &= (args.args[0] == 9);
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break;
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case 1:
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passed &= !rc;
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passed &= (args.args_count == 3);
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passed &= (args.args[0] == 10);
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passed &= (args.args[1] == 11);
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passed &= (args.args[2] == 12);
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break;
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case 2:
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passed &= !rc;
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passed &= (args.args_count == 2);
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passed &= (args.args[0] == 13);
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passed &= (args.args[1] == 14);
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break;
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case 3:
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passed &= !rc;
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passed &= (args.args_count == 2);
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passed &= (args.args[0] == 15);
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passed &= (args.args[1] == 16);
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break;
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default:
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passed = false;
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}
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selftest(passed, "index %i - data error on node %s rc=%i\n",
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i, args.np->full_name, rc);
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}
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of_node_put(np);
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}
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static void __init of_selftest_parse_interrupts_extended(void)
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{
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struct device_node *np;
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struct of_phandle_args args;
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int i, rc;
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np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
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if (!np) {
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pr_err("missing testcase data\n");
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return;
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}
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for (i = 0; i < 7; i++) {
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bool passed = true;
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rc = of_irq_parse_one(np, i, &args);
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/* Test the values from tests-phandle.dtsi */
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switch (i) {
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case 0:
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passed &= !rc;
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passed &= (args.args_count == 1);
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passed &= (args.args[0] == 1);
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break;
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case 1:
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passed &= !rc;
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passed &= (args.args_count == 3);
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passed &= (args.args[0] == 2);
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passed &= (args.args[1] == 3);
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passed &= (args.args[2] == 4);
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break;
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case 2:
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passed &= !rc;
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passed &= (args.args_count == 2);
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passed &= (args.args[0] == 5);
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passed &= (args.args[1] == 6);
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break;
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case 3:
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passed &= !rc;
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passed &= (args.args_count == 1);
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passed &= (args.args[0] == 9);
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break;
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case 4:
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passed &= !rc;
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passed &= (args.args_count == 3);
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passed &= (args.args[0] == 10);
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passed &= (args.args[1] == 11);
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passed &= (args.args[2] == 12);
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break;
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case 5:
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passed &= !rc;
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passed &= (args.args_count == 2);
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passed &= (args.args[0] == 13);
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passed &= (args.args[1] == 14);
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break;
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case 6:
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passed &= !rc;
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passed &= (args.args_count == 1);
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passed &= (args.args[0] == 15);
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break;
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default:
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passed = false;
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}
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selftest(passed, "index %i - data error on node %s rc=%i\n",
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i, args.np->full_name, rc);
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}
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of_node_put(np);
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}
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static int __init of_selftest(void)
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{
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struct device_node *np;
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np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
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if (!np) {
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pr_info("No testcase data in device tree; not running tests\n");
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return 0;
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}
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of_node_put(np);
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pr_info("start of selftest - you will see error messages\n");
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of_selftest_parse_phandle_with_args();
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of_selftest_property_match_string();
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of_selftest_parse_interrupts();
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of_selftest_parse_interrupts_extended();
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pr_info("end of selftest - %i passed, %i failed\n",
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selftest_results.passed, selftest_results.failed);
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return 0;
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}
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late_initcall(of_selftest);
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