| /* | |
| * 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/module.h> | |
| #include <linux/of.h> | |
| #include <linux/of_irq.h> | |
| #include <linux/list.h> | |
| #include <linux/mutex.h> | |
| #include <linux/slab.h> | |
| #include <linux/device.h> | |
| static struct selftest_results { | |
| int passed; | |
| int failed; | |
| } selftest_results; | |
| #define selftest(result, fmt, ...) { \ | |
| if (!(result)) { \ | |
| 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__); \ | |
| } \ | |
| } | |
| 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_match_string(void) | |
| { | |
| 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", rc); | |
| rc = of_property_match_string(np, "missing-property", "blah"); | |
| selftest(rc == -EINVAL, "missing property; rc=%i", rc); | |
| rc = of_property_match_string(np, "empty-property", "blah"); | |
| selftest(rc == -ENODATA, "empty property; rc=%i", rc); | |
| rc = of_property_match_string(np, "unterminated-string", "blah"); | |
| selftest(rc == -EILSEQ, "unterminated string; rc=%i", rc); | |
| } | |
| 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 int __init of_selftest(void) | |
| { | |
| struct device_node *np; | |
| np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); | |
| if (!np) { | |
| pr_info("No testcase data in device tree; not running tests\n"); | |
| return 0; | |
| } | |
| of_node_put(np); | |
| pr_info("start of selftest - you will see error messages\n"); | |
| of_selftest_parse_phandle_with_args(); | |
| of_selftest_property_match_string(); | |
| of_selftest_parse_interrupts(); | |
| of_selftest_parse_interrupts_extended(); | |
| pr_info("end of selftest - %i passed, %i failed\n", | |
| selftest_results.passed, selftest_results.failed); | |
| return 0; | |
| } | |
| late_initcall(of_selftest); |