53a42093d9
Add some runtime test cases for the library of device tree parsing functions.
v2: - Add testcase for phandle with 0 args
- Don't run testcases if testcase data isn't present in device tree
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
139 lines
3.3 KiB
C
139 lines
3.3 KiB
C
/*
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* Self tests for device tree subsystem
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*/
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#define pr_fmt(fmt) "### %s(): " fmt, __func__
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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/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 bool selftest_passed = true;
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#define selftest(result, fmt, ...) { \
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selftest_passed &= (result); \
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if (!(result)) \
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pr_err("FAIL %s:%i " fmt, __FILE__, __LINE__, ##__VA_ARGS__); \
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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 rc, i;
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bool passed_all = true;
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pr_info("start\n");
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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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for (i = 0; i < 7; 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 == -EINVAL);
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break;
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default:
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passed = false;
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}
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if (!passed) {
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int j;
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pr_err("index %i - data error on node %s rc=%i regs=[",
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i, args.np->full_name, rc);
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for (j = 0; j < args.args_count; j++)
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printk(" %i", args.args[j]);
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printk(" ]\n");
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passed_all = false;
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}
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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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passed_all &= (rc == -EINVAL);
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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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passed_all &= (rc == -EINVAL);
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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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passed_all &= (rc == -EINVAL);
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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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passed_all &= (rc == -EINVAL);
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pr_info("end - %s\n", passed_all ? "PASS" : "FAIL");
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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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pr_info("end of selftest - %s\n", selftest_passed ? "PASS" : "FAIL");
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return 0;
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}
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late_initcall(of_selftest);
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