| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * 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/hashtable.h> |
| #include <linux/libfdt.h> |
| #include <linux/of.h> |
| #include <linux/of_fdt.h> |
| #include <linux/of_irq.h> |
| #include <linux/of_platform.h> |
| #include <linux/list.h> |
| #include <linux/mutex.h> |
| #include <linux/slab.h> |
| #include <linux/device.h> |
| #include <linux/platform_device.h> |
| |
| #include <linux/i2c.h> |
| #include <linux/i2c-mux.h> |
| |
| #include <linux/bitops.h> |
| |
| #include "of_private.h" |
| |
| static struct unittest_results { |
| int passed; |
| int failed; |
| } unittest_results; |
| |
| #define unittest(result, fmt, ...) ({ \ |
| bool failed = !(result); \ |
| if (failed) { \ |
| unittest_results.failed++; \ |
| pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \ |
| } else { \ |
| unittest_results.passed++; \ |
| pr_debug("pass %s():%i\n", __func__, __LINE__); \ |
| } \ |
| failed; \ |
| }) |
| |
| static void __init of_unittest_find_node_by_name(void) |
| { |
| struct device_node *np; |
| const char *options, *name; |
| |
| np = of_find_node_by_path("/testcase-data"); |
| name = kasprintf(GFP_KERNEL, "%pOF", np); |
| unittest(np && !strcmp("/testcase-data", name), |
| "find /testcase-data failed\n"); |
| of_node_put(np); |
| kfree(name); |
| |
| /* Test if trailing '/' works */ |
| np = of_find_node_by_path("/testcase-data/"); |
| unittest(!np, "trailing '/' on /testcase-data/ should fail\n"); |
| |
| np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); |
| name = kasprintf(GFP_KERNEL, "%pOF", np); |
| unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name), |
| "find /testcase-data/phandle-tests/consumer-a failed\n"); |
| of_node_put(np); |
| kfree(name); |
| |
| np = of_find_node_by_path("testcase-alias"); |
| name = kasprintf(GFP_KERNEL, "%pOF", np); |
| unittest(np && !strcmp("/testcase-data", name), |
| "find testcase-alias failed\n"); |
| of_node_put(np); |
| kfree(name); |
| |
| /* Test if trailing '/' works on aliases */ |
| np = of_find_node_by_path("testcase-alias/"); |
| unittest(!np, "trailing '/' on testcase-alias/ should fail\n"); |
| |
| np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a"); |
| name = kasprintf(GFP_KERNEL, "%pOF", np); |
| unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name), |
| "find testcase-alias/phandle-tests/consumer-a failed\n"); |
| of_node_put(np); |
| kfree(name); |
| |
| np = of_find_node_by_path("/testcase-data/missing-path"); |
| unittest(!np, "non-existent path returned node %pOF\n", np); |
| of_node_put(np); |
| |
| np = of_find_node_by_path("missing-alias"); |
| unittest(!np, "non-existent alias returned node %pOF\n", np); |
| of_node_put(np); |
| |
| np = of_find_node_by_path("testcase-alias/missing-path"); |
| unittest(!np, "non-existent alias with relative path returned node %pOF\n", np); |
| of_node_put(np); |
| |
| np = of_find_node_opts_by_path("/testcase-data:testoption", &options); |
| unittest(np && !strcmp("testoption", options), |
| "option path test failed\n"); |
| of_node_put(np); |
| |
| np = of_find_node_opts_by_path("/testcase-data:test/option", &options); |
| unittest(np && !strcmp("test/option", options), |
| "option path test, subcase #1 failed\n"); |
| of_node_put(np); |
| |
| np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options); |
| unittest(np && !strcmp("test/option", options), |
| "option path test, subcase #2 failed\n"); |
| of_node_put(np); |
| |
| np = of_find_node_opts_by_path("/testcase-data:testoption", NULL); |
| unittest(np, "NULL option path test failed\n"); |
| of_node_put(np); |
| |
| np = of_find_node_opts_by_path("testcase-alias:testaliasoption", |
| &options); |
| unittest(np && !strcmp("testaliasoption", options), |
| "option alias path test failed\n"); |
| of_node_put(np); |
| |
| np = of_find_node_opts_by_path("testcase-alias:test/alias/option", |
| &options); |
| unittest(np && !strcmp("test/alias/option", options), |
| "option alias path test, subcase #1 failed\n"); |
| of_node_put(np); |
| |
| np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL); |
| unittest(np, "NULL option alias path test failed\n"); |
| of_node_put(np); |
| |
| options = "testoption"; |
| np = of_find_node_opts_by_path("testcase-alias", &options); |
| unittest(np && !options, "option clearing test failed\n"); |
| of_node_put(np); |
| |
| options = "testoption"; |
| np = of_find_node_opts_by_path("/", &options); |
| unittest(np && !options, "option clearing root node test failed\n"); |
| of_node_put(np); |
| } |
| |
| static void __init of_unittest_dynamic(void) |
| { |
| struct device_node *np; |
| struct property *prop; |
| |
| np = of_find_node_by_path("/testcase-data"); |
| if (!np) { |
| pr_err("missing testcase data\n"); |
| return; |
| } |
| |
| /* Array of 4 properties for the purpose of testing */ |
| prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL); |
| if (!prop) { |
| unittest(0, "kzalloc() failed\n"); |
| return; |
| } |
| |
| /* Add a new property - should pass*/ |
| prop->name = "new-property"; |
| prop->value = "new-property-data"; |
| prop->length = strlen(prop->value) + 1; |
| unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n"); |
| |
| /* Try to add an existing property - should fail */ |
| prop++; |
| prop->name = "new-property"; |
| prop->value = "new-property-data-should-fail"; |
| prop->length = strlen(prop->value) + 1; |
| unittest(of_add_property(np, prop) != 0, |
| "Adding an existing property should have failed\n"); |
| |
| /* Try to modify an existing property - should pass */ |
| prop->value = "modify-property-data-should-pass"; |
| prop->length = strlen(prop->value) + 1; |
| unittest(of_update_property(np, prop) == 0, |
| "Updating an existing property should have passed\n"); |
| |
| /* Try to modify non-existent property - should pass*/ |
| prop++; |
| prop->name = "modify-property"; |
| prop->value = "modify-missing-property-data-should-pass"; |
| prop->length = strlen(prop->value) + 1; |
| unittest(of_update_property(np, prop) == 0, |
| "Updating a missing property should have passed\n"); |
| |
| /* Remove property - should pass */ |
| unittest(of_remove_property(np, prop) == 0, |
| "Removing a property should have passed\n"); |
| |
| /* Adding very large property - should pass */ |
| prop++; |
| prop->name = "large-property-PAGE_SIZEx8"; |
| prop->length = PAGE_SIZE * 8; |
| prop->value = kzalloc(prop->length, GFP_KERNEL); |
| unittest(prop->value != NULL, "Unable to allocate large buffer\n"); |
| if (prop->value) |
| unittest(of_add_property(np, prop) == 0, |
| "Adding a large property should have passed\n"); |
| } |
| |
| static int __init of_unittest_check_node_linkage(struct device_node *np) |
| { |
| struct device_node *child; |
| int count = 0, rc; |
| |
| for_each_child_of_node(np, child) { |
| if (child->parent != np) { |
| pr_err("Child node %s links to wrong parent %s\n", |
| child->name, np->name); |
| rc = -EINVAL; |
| goto put_child; |
| } |
| |
| rc = of_unittest_check_node_linkage(child); |
| if (rc < 0) |
| goto put_child; |
| count += rc; |
| } |
| |
| return count + 1; |
| put_child: |
| of_node_put(child); |
| return rc; |
| } |
| |
| static void __init of_unittest_check_tree_linkage(void) |
| { |
| struct device_node *np; |
| int allnode_count = 0, child_count; |
| |
| if (!of_root) |
| return; |
| |
| for_each_of_allnodes(np) |
| allnode_count++; |
| child_count = of_unittest_check_node_linkage(of_root); |
| |
| unittest(child_count > 0, "Device node data structure is corrupted\n"); |
| unittest(child_count == allnode_count, |
| "allnodes list size (%i) doesn't match sibling lists size (%i)\n", |
| allnode_count, child_count); |
| pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count); |
| } |
| |
| static void __init of_unittest_printf_one(struct device_node *np, const char *fmt, |
| const char *expected) |
| { |
| unsigned char buf[strlen(expected)+10]; |
| int size, i; |
| |
| /* Baseline; check conversion with a large size limit */ |
| memset(buf, 0xff, sizeof(buf)); |
| size = snprintf(buf, sizeof(buf) - 2, fmt, np); |
| |
| /* use strcmp() instead of strncmp() here to be absolutely sure strings match */ |
| unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff), |
| "sprintf failed; fmt='%s' expected='%s' rslt='%s'\n", |
| fmt, expected, buf); |
| |
| /* Make sure length limits work */ |
| size++; |
| for (i = 0; i < 2; i++, size--) { |
| /* Clear the buffer, and make sure it works correctly still */ |
| memset(buf, 0xff, sizeof(buf)); |
| snprintf(buf, size+1, fmt, np); |
| unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 0xff), |
| "snprintf failed; size=%i fmt='%s' expected='%s' rslt='%s'\n", |
| size, fmt, expected, buf); |
| } |
| } |
| |
| static void __init of_unittest_printf(void) |
| { |
| struct device_node *np; |
| const char *full_name = "/testcase-data/platform-tests/test-device@1/dev@100"; |
| char phandle_str[16] = ""; |
| |
| np = of_find_node_by_path(full_name); |
| if (!np) { |
| unittest(np, "testcase data missing\n"); |
| return; |
| } |
| |
| num_to_str(phandle_str, sizeof(phandle_str), np->phandle); |
| |
| of_unittest_printf_one(np, "%pOF", full_name); |
| of_unittest_printf_one(np, "%pOFf", full_name); |
| of_unittest_printf_one(np, "%pOFp", phandle_str); |
| of_unittest_printf_one(np, "%pOFP", "dev@100"); |
| of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC"); |
| of_unittest_printf_one(np, "%10pOFP", " dev@100"); |
| of_unittest_printf_one(np, "%-10pOFP", "dev@100 "); |
| of_unittest_printf_one(of_root, "%pOFP", "/"); |
| of_unittest_printf_one(np, "%pOFF", "----"); |
| of_unittest_printf_one(np, "%pOFPF", "dev@100:----"); |
| of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device"); |
| of_unittest_printf_one(np, "%pOFc", "test-sub-device"); |
| of_unittest_printf_one(np, "%pOFC", |
| "\"test-sub-device\",\"test-compat2\",\"test-compat3\""); |
| } |
| |
| struct node_hash { |
| struct hlist_node node; |
| struct device_node *np; |
| }; |
| |
| static DEFINE_HASHTABLE(phandle_ht, 8); |
| static void __init of_unittest_check_phandles(void) |
| { |
| struct device_node *np; |
| struct node_hash *nh; |
| struct hlist_node *tmp; |
| int i, dup_count = 0, phandle_count = 0; |
| |
| for_each_of_allnodes(np) { |
| if (!np->phandle) |
| continue; |
| |
| hash_for_each_possible(phandle_ht, nh, node, np->phandle) { |
| if (nh->np->phandle == np->phandle) { |
| pr_info("Duplicate phandle! %i used by %pOF and %pOF\n", |
| np->phandle, nh->np, np); |
| dup_count++; |
| break; |
| } |
| } |
| |
| nh = kzalloc(sizeof(*nh), GFP_KERNEL); |
| if (WARN_ON(!nh)) |
| return; |
| |
| nh->np = np; |
| hash_add(phandle_ht, &nh->node, np->phandle); |
| phandle_count++; |
| } |
| unittest(dup_count == 0, "Found %i duplicates in %i phandles\n", |
| dup_count, phandle_count); |
| |
| /* Clean up */ |
| hash_for_each_safe(phandle_ht, i, tmp, nh, node) { |
| hash_del(&nh->node); |
| kfree(nh); |
| } |
| } |
| |
| static void __init of_unittest_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"); |
| unittest(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; |
| } |
| |
| unittest(passed, "index %i - data error on node %pOF rc=%i\n", |
| i, args.np, rc); |
| } |
| |
| /* Check for missing list property */ |
| rc = of_parse_phandle_with_args(np, "phandle-list-missing", |
| "#phandle-cells", 0, &args); |
| unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); |
| rc = of_count_phandle_with_args(np, "phandle-list-missing", |
| "#phandle-cells"); |
| unittest(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); |
| unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); |
| rc = of_count_phandle_with_args(np, "phandle-list", |
| "#phandle-cells-missing"); |
| unittest(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); |
| unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); |
| rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle", |
| "#phandle-cells"); |
| unittest(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); |
| unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); |
| rc = of_count_phandle_with_args(np, "phandle-list-bad-args", |
| "#phandle-cells"); |
| unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); |
| } |
| |
| static void __init of_unittest_property_string(void) |
| { |
| const char *strings[4]; |
| 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"); |
| unittest(rc == 0, "first expected:0 got:%i\n", rc); |
| rc = of_property_match_string(np, "phandle-list-names", "second"); |
| unittest(rc == 1, "second expected:1 got:%i\n", rc); |
| rc = of_property_match_string(np, "phandle-list-names", "third"); |
| unittest(rc == 2, "third expected:2 got:%i\n", rc); |
| rc = of_property_match_string(np, "phandle-list-names", "fourth"); |
| unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc); |
| rc = of_property_match_string(np, "missing-property", "blah"); |
| unittest(rc == -EINVAL, "missing property; rc=%i\n", rc); |
| rc = of_property_match_string(np, "empty-property", "blah"); |
| unittest(rc == -ENODATA, "empty property; rc=%i\n", rc); |
| rc = of_property_match_string(np, "unterminated-string", "blah"); |
| unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); |
| |
| /* of_property_count_strings() tests */ |
| rc = of_property_count_strings(np, "string-property"); |
| unittest(rc == 1, "Incorrect string count; rc=%i\n", rc); |
| rc = of_property_count_strings(np, "phandle-list-names"); |
| unittest(rc == 3, "Incorrect string count; rc=%i\n", rc); |
| rc = of_property_count_strings(np, "unterminated-string"); |
| unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); |
| rc = of_property_count_strings(np, "unterminated-string-list"); |
| unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc); |
| |
| /* of_property_read_string_index() tests */ |
| rc = of_property_read_string_index(np, "string-property", 0, strings); |
| unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc); |
| strings[0] = NULL; |
| rc = of_property_read_string_index(np, "string-property", 1, strings); |
| unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); |
| rc = of_property_read_string_index(np, "phandle-list-names", 0, strings); |
| unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc); |
| rc = of_property_read_string_index(np, "phandle-list-names", 1, strings); |
| unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc); |
| rc = of_property_read_string_index(np, "phandle-list-names", 2, strings); |
| unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc); |
| strings[0] = NULL; |
| rc = of_property_read_string_index(np, "phandle-list-names", 3, strings); |
| unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); |
| strings[0] = NULL; |
| rc = of_property_read_string_index(np, "unterminated-string", 0, strings); |
| unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); |
| rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings); |
| unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc); |
| strings[0] = NULL; |
| rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */ |
| unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); |
| strings[1] = NULL; |
| |
| /* of_property_read_string_array() tests */ |
| rc = of_property_read_string_array(np, "string-property", strings, 4); |
| unittest(rc == 1, "Incorrect string count; rc=%i\n", rc); |
| rc = of_property_read_string_array(np, "phandle-list-names", strings, 4); |
| unittest(rc == 3, "Incorrect string count; rc=%i\n", rc); |
| rc = of_property_read_string_array(np, "unterminated-string", strings, 4); |
| unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); |
| /* -- An incorrectly formed string should cause a failure */ |
| rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4); |
| unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc); |
| /* -- parsing the correctly formed strings should still work: */ |
| strings[2] = NULL; |
| rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2); |
| unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc); |
| strings[1] = NULL; |
| rc = of_property_read_string_array(np, "phandle-list-names", strings, 1); |
| unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]); |
| } |
| |
| #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \ |
| (p1)->value && (p2)->value && \ |
| !memcmp((p1)->value, (p2)->value, (p1)->length) && \ |
| !strcmp((p1)->name, (p2)->name)) |
| static void __init of_unittest_property_copy(void) |
| { |
| #ifdef CONFIG_OF_DYNAMIC |
| struct property p1 = { .name = "p1", .length = 0, .value = "" }; |
| struct property p2 = { .name = "p2", .length = 5, .value = "abcd" }; |
| struct property *new; |
| |
| new = __of_prop_dup(&p1, GFP_KERNEL); |
| unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n"); |
| kfree(new->value); |
| kfree(new->name); |
| kfree(new); |
| |
| new = __of_prop_dup(&p2, GFP_KERNEL); |
| unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n"); |
| kfree(new->value); |
| kfree(new->name); |
| kfree(new); |
| #endif |
| } |
| |
| static void __init of_unittest_changeset(void) |
| { |
| #ifdef CONFIG_OF_DYNAMIC |
| struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" }; |
| struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" }; |
| struct property *ppremove; |
| struct device_node *n1, *n2, *n21, *nremove, *parent, *np; |
| struct of_changeset chgset; |
| |
| n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1"); |
| unittest(n1, "testcase setup failure\n"); |
| n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2"); |
| unittest(n2, "testcase setup failure\n"); |
| n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21"); |
| unittest(n21, "testcase setup failure %p\n", n21); |
| nremove = of_find_node_by_path("/testcase-data/changeset/node-remove"); |
| unittest(nremove, "testcase setup failure\n"); |
| ppadd = __of_prop_dup(&padd, GFP_KERNEL); |
| unittest(ppadd, "testcase setup failure\n"); |
| ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL); |
| unittest(ppupdate, "testcase setup failure\n"); |
| parent = nremove->parent; |
| n1->parent = parent; |
| n2->parent = parent; |
| n21->parent = n2; |
| n2->child = n21; |
| ppremove = of_find_property(parent, "prop-remove", NULL); |
| unittest(ppremove, "failed to find removal prop"); |
| |
| of_changeset_init(&chgset); |
| unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n"); |
| unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n"); |
| unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n"); |
| unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n"); |
| unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n"); |
| unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n"); |
| unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n"); |
| unittest(!of_changeset_apply(&chgset), "apply failed\n"); |
| |
| /* Make sure node names are constructed correctly */ |
| unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")), |
| "'%pOF' not added\n", n21); |
| of_node_put(np); |
| |
| unittest(!of_changeset_revert(&chgset), "revert failed\n"); |
| |
| of_changeset_destroy(&chgset); |
| #endif |
| } |
| |
| static void __init of_unittest_parse_interrupts(void) |
| { |
| struct device_node *np; |
| struct of_phandle_args args; |
| int i, rc; |
| |
| if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC) |
| return; |
| |
| 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)); |
| |
| unittest(passed, "index %i - data error on node %pOF rc=%i\n", |
| i, args.np, 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; |
| } |
| unittest(passed, "index %i - data error on node %pOF rc=%i\n", |
| i, args.np, rc); |
| } |
| of_node_put(np); |
| } |
| |
| static void __init of_unittest_parse_interrupts_extended(void) |
| { |
| struct device_node *np; |
| struct of_phandle_args args; |
| int i, rc; |
| |
| if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC) |
| return; |
| |
| 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; |
| } |
| |
| unittest(passed, "index %i - data error on node %pOF rc=%i\n", |
| i, args.np, rc); |
| } |
| of_node_put(np); |
| } |
| |
| static const struct of_device_id match_node_table[] = { |
| { .data = "A", .name = "name0", }, /* Name alone is lowest priority */ |
| { .data = "B", .type = "type1", }, /* followed by type alone */ |
| |
| { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */ |
| { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */ |
| { .data = "Cc", .name = "name2", .type = "type2", }, |
| |
| { .data = "E", .compatible = "compat3" }, |
| { .data = "G", .compatible = "compat2", }, |
| { .data = "H", .compatible = "compat2", .name = "name5", }, |
| { .data = "I", .compatible = "compat2", .type = "type1", }, |
| { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", }, |
| { .data = "K", .compatible = "compat2", .name = "name9", }, |
| {} |
| }; |
| |
| static struct { |
| const char *path; |
| const char *data; |
| } match_node_tests[] = { |
| { .path = "/testcase-data/match-node/name0", .data = "A", }, |
| { .path = "/testcase-data/match-node/name1", .data = "B", }, |
| { .path = "/testcase-data/match-node/a/name2", .data = "Ca", }, |
| { .path = "/testcase-data/match-node/b/name2", .data = "Cb", }, |
| { .path = "/testcase-data/match-node/c/name2", .data = "Cc", }, |
| { .path = "/testcase-data/match-node/name3", .data = "E", }, |
| { .path = "/testcase-data/match-node/name4", .data = "G", }, |
| { .path = "/testcase-data/match-node/name5", .data = "H", }, |
| { .path = "/testcase-data/match-node/name6", .data = "G", }, |
| { .path = "/testcase-data/match-node/name7", .data = "I", }, |
| { .path = "/testcase-data/match-node/name8", .data = "J", }, |
| { .path = "/testcase-data/match-node/name9", .data = "K", }, |
| }; |
| |
| static void __init of_unittest_match_node(void) |
| { |
| struct device_node *np; |
| const struct of_device_id *match; |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) { |
| np = of_find_node_by_path(match_node_tests[i].path); |
| if (!np) { |
| unittest(0, "missing testcase node %s\n", |
| match_node_tests[i].path); |
| continue; |
| } |
| |
| match = of_match_node(match_node_table, np); |
| if (!match) { |
| unittest(0, "%s didn't match anything\n", |
| match_node_tests[i].path); |
| continue; |
| } |
| |
| if (strcmp(match->data, match_node_tests[i].data) != 0) { |
| unittest(0, "%s got wrong match. expected %s, got %s\n", |
| match_node_tests[i].path, match_node_tests[i].data, |
| (const char *)match->data); |
| continue; |
| } |
| unittest(1, "passed"); |
| } |
| } |
| |
| static struct resource test_bus_res = { |
| .start = 0xfffffff8, |
| .end = 0xfffffff9, |
| .flags = IORESOURCE_MEM, |
| }; |
| static const struct platform_device_info test_bus_info = { |
| .name = "unittest-bus", |
| }; |
| static void __init of_unittest_platform_populate(void) |
| { |
| int irq, rc; |
| struct device_node *np, *child, *grandchild; |
| struct platform_device *pdev, *test_bus; |
| const struct of_device_id match[] = { |
| { .compatible = "test-device", }, |
| {} |
| }; |
| |
| np = of_find_node_by_path("/testcase-data"); |
| of_platform_default_populate(np, NULL, NULL); |
| |
| /* Test that a missing irq domain returns -EPROBE_DEFER */ |
| np = of_find_node_by_path("/testcase-data/testcase-device1"); |
| pdev = of_find_device_by_node(np); |
| unittest(pdev, "device 1 creation failed\n"); |
| |
| if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) { |
| irq = platform_get_irq(pdev, 0); |
| unittest(irq == -EPROBE_DEFER, |
| "device deferred probe failed - %d\n", irq); |
| |
| /* Test that a parsing failure does not return -EPROBE_DEFER */ |
| np = of_find_node_by_path("/testcase-data/testcase-device2"); |
| pdev = of_find_device_by_node(np); |
| unittest(pdev, "device 2 creation failed\n"); |
| irq = platform_get_irq(pdev, 0); |
| unittest(irq < 0 && irq != -EPROBE_DEFER, |
| "device parsing error failed - %d\n", irq); |
| } |
| |
| np = of_find_node_by_path("/testcase-data/platform-tests"); |
| unittest(np, "No testcase data in device tree\n"); |
| if (!np) |
| return; |
| |
| test_bus = platform_device_register_full(&test_bus_info); |
| rc = PTR_ERR_OR_ZERO(test_bus); |
| unittest(!rc, "testbus registration failed; rc=%i\n", rc); |
| if (rc) |
| return; |
| test_bus->dev.of_node = np; |
| |
| /* |
| * Add a dummy resource to the test bus node after it is |
| * registered to catch problems with un-inserted resources. The |
| * DT code doesn't insert the resources, and it has caused the |
| * kernel to oops in the past. This makes sure the same bug |
| * doesn't crop up again. |
| */ |
| platform_device_add_resources(test_bus, &test_bus_res, 1); |
| |
| of_platform_populate(np, match, NULL, &test_bus->dev); |
| for_each_child_of_node(np, child) { |
| for_each_child_of_node(child, grandchild) |
| unittest(of_find_device_by_node(grandchild), |
| "Could not create device for node '%s'\n", |
| grandchild->name); |
| } |
| |
| of_platform_depopulate(&test_bus->dev); |
| for_each_child_of_node(np, child) { |
| for_each_child_of_node(child, grandchild) |
| unittest(!of_find_device_by_node(grandchild), |
| "device didn't get destroyed '%s'\n", |
| grandchild->name); |
| } |
| |
| platform_device_unregister(test_bus); |
| of_node_put(np); |
| } |
| |
| /** |
| * update_node_properties - adds the properties |
| * of np into dup node (present in live tree) and |
| * updates parent of children of np to dup. |
| * |
| * @np: node whose properties are being added to the live tree |
| * @dup: node present in live tree to be updated |
| */ |
| static void update_node_properties(struct device_node *np, |
| struct device_node *dup) |
| { |
| struct property *prop; |
| struct property *save_next; |
| struct device_node *child; |
| int ret; |
| |
| for_each_child_of_node(np, child) |
| child->parent = dup; |
| |
| /* |
| * "unittest internal error: unable to add testdata property" |
| * |
| * If this message reports a property in node '/__symbols__' then |
| * the respective unittest overlay contains a label that has the |
| * same name as a label in the live devicetree. The label will |
| * be in the live devicetree only if the devicetree source was |
| * compiled with the '-@' option. If you encounter this error, |
| * please consider renaming __all__ of the labels in the unittest |
| * overlay dts files with an odd prefix that is unlikely to be |
| * used in a real devicetree. |
| */ |
| |
| /* |
| * open code for_each_property_of_node() because of_add_property() |
| * sets prop->next to NULL |
| */ |
| for (prop = np->properties; prop != NULL; prop = save_next) { |
| save_next = prop->next; |
| ret = of_add_property(dup, prop); |
| if (ret) |
| pr_err("unittest internal error: unable to add testdata property %pOF/%s", |
| np, prop->name); |
| } |
| } |
| |
| /** |
| * attach_node_and_children - attaches nodes |
| * and its children to live tree |
| * |
| * @np: Node to attach to live tree |
| */ |
| static void attach_node_and_children(struct device_node *np) |
| { |
| struct device_node *next, *dup, *child; |
| unsigned long flags; |
| const char *full_name; |
| |
| full_name = kasprintf(GFP_KERNEL, "%pOF", np); |
| |
| if (!strcmp(full_name, "/__local_fixups__") || |
| !strcmp(full_name, "/__fixups__")) { |
| kfree(full_name); |
| return; |
| } |
| |
| dup = of_find_node_by_path(full_name); |
| kfree(full_name); |
| if (dup) { |
| update_node_properties(np, dup); |
| return; |
| } |
| |
| child = np->child; |
| np->child = NULL; |
| |
| mutex_lock(&of_mutex); |
| raw_spin_lock_irqsave(&devtree_lock, flags); |
| np->sibling = np->parent->child; |
| np->parent->child = np; |
| of_node_clear_flag(np, OF_DETACHED); |
| raw_spin_unlock_irqrestore(&devtree_lock, flags); |
| |
| __of_attach_node_sysfs(np); |
| mutex_unlock(&of_mutex); |
| |
| while (child) { |
| next = child->sibling; |
| attach_node_and_children(child); |
| child = next; |
| } |
| } |
| |
| /** |
| * unittest_data_add - Reads, copies data from |
| * linked tree and attaches it to the live tree |
| */ |
| static int __init unittest_data_add(void) |
| { |
| void *unittest_data; |
| struct device_node *unittest_data_node, *np; |
| /* |
| * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically |
| * created by cmd_dt_S_dtb in scripts/Makefile.lib |
| */ |
| extern uint8_t __dtb_testcases_begin[]; |
| extern uint8_t __dtb_testcases_end[]; |
| const int size = __dtb_testcases_end - __dtb_testcases_begin; |
| int rc; |
| |
| if (!size) { |
| pr_warn("%s: No testcase data to attach; not running tests\n", |
| __func__); |
| return -ENODATA; |
| } |
| |
| /* creating copy */ |
| unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL); |
| |
| if (!unittest_data) { |
| pr_warn("%s: Failed to allocate memory for unittest_data; " |
| "not running tests\n", __func__); |
| return -ENOMEM; |
| } |
| of_fdt_unflatten_tree(unittest_data, NULL, &unittest_data_node); |
| if (!unittest_data_node) { |
| pr_warn("%s: No tree to attach; not running tests\n", __func__); |
| kfree(unittest_data); |
| return -ENODATA; |
| } |
| of_node_set_flag(unittest_data_node, OF_DETACHED); |
| rc = of_resolve_phandles(unittest_data_node); |
| if (rc) { |
| pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc); |
| return -EINVAL; |
| } |
| |
| if (!of_root) { |
| of_root = unittest_data_node; |
| for_each_of_allnodes(np) |
| __of_attach_node_sysfs(np); |
| of_aliases = of_find_node_by_path("/aliases"); |
| of_chosen = of_find_node_by_path("/chosen"); |
| return 0; |
| } |
| |
| /* attach the sub-tree to live tree */ |
| np = unittest_data_node->child; |
| while (np) { |
| struct device_node *next = np->sibling; |
| |
| np->parent = of_root; |
| attach_node_and_children(np); |
| np = next; |
| } |
| return 0; |
| } |
| |
| #ifdef CONFIG_OF_OVERLAY |
| |
| static int unittest_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct device_node *np = dev->of_node; |
| |
| if (np == NULL) { |
| dev_err(dev, "No OF data for device\n"); |
| return -EINVAL; |
| |
| } |
| |
| dev_dbg(dev, "%s for node @%pOF\n", __func__, np); |
| |
| of_platform_populate(np, NULL, NULL, &pdev->dev); |
| |
| return 0; |
| } |
| |
| static int unittest_remove(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct device_node *np = dev->of_node; |
| |
| dev_dbg(dev, "%s for node @%pOF\n", __func__, np); |
| return 0; |
| } |
| |
| static const struct of_device_id unittest_match[] = { |
| { .compatible = "unittest", }, |
| {}, |
| }; |
| |
| static struct platform_driver unittest_driver = { |
| .probe = unittest_probe, |
| .remove = unittest_remove, |
| .driver = { |
| .name = "unittest", |
| .of_match_table = of_match_ptr(unittest_match), |
| }, |
| }; |
| |
| /* get the platform device instantiated at the path */ |
| static struct platform_device *of_path_to_platform_device(const char *path) |
| { |
| struct device_node *np; |
| struct platform_device *pdev; |
| |
| np = of_find_node_by_path(path); |
| if (np == NULL) |
| return NULL; |
| |
| pdev = of_find_device_by_node(np); |
| of_node_put(np); |
| |
| return pdev; |
| } |
| |
| /* find out if a platform device exists at that path */ |
| static int of_path_platform_device_exists(const char *path) |
| { |
| struct platform_device *pdev; |
| |
| pdev = of_path_to_platform_device(path); |
| platform_device_put(pdev); |
| return pdev != NULL; |
| } |
| |
| #if IS_BUILTIN(CONFIG_I2C) |
| |
| /* get the i2c client device instantiated at the path */ |
| static struct i2c_client *of_path_to_i2c_client(const char *path) |
| { |
| struct device_node *np; |
| struct i2c_client *client; |
| |
| np = of_find_node_by_path(path); |
| if (np == NULL) |
| return NULL; |
| |
| client = of_find_i2c_device_by_node(np); |
| of_node_put(np); |
| |
| return client; |
| } |
| |
| /* find out if a i2c client device exists at that path */ |
| static int of_path_i2c_client_exists(const char *path) |
| { |
| struct i2c_client *client; |
| |
| client = of_path_to_i2c_client(path); |
| if (client) |
| put_device(&client->dev); |
| return client != NULL; |
| } |
| #else |
| static int of_path_i2c_client_exists(const char *path) |
| { |
| return 0; |
| } |
| #endif |
| |
| enum overlay_type { |
| PDEV_OVERLAY, |
| I2C_OVERLAY |
| }; |
| |
| static int of_path_device_type_exists(const char *path, |
| enum overlay_type ovtype) |
| { |
| switch (ovtype) { |
| case PDEV_OVERLAY: |
| return of_path_platform_device_exists(path); |
| case I2C_OVERLAY: |
| return of_path_i2c_client_exists(path); |
| } |
| return 0; |
| } |
| |
| static const char *unittest_path(int nr, enum overlay_type ovtype) |
| { |
| const char *base; |
| static char buf[256]; |
| |
| switch (ovtype) { |
| case PDEV_OVERLAY: |
| base = "/testcase-data/overlay-node/test-bus"; |
| break; |
| case I2C_OVERLAY: |
| base = "/testcase-data/overlay-node/test-bus/i2c-test-bus"; |
| break; |
| default: |
| buf[0] = '\0'; |
| return buf; |
| } |
| snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr); |
| buf[sizeof(buf) - 1] = '\0'; |
| return buf; |
| } |
| |
| static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype) |
| { |
| const char *path; |
| |
| path = unittest_path(unittest_nr, ovtype); |
| |
| switch (ovtype) { |
| case PDEV_OVERLAY: |
| return of_path_platform_device_exists(path); |
| case I2C_OVERLAY: |
| return of_path_i2c_client_exists(path); |
| } |
| return 0; |
| } |
| |
| static const char *overlay_path(int nr) |
| { |
| static char buf[256]; |
| |
| snprintf(buf, sizeof(buf) - 1, |
| "/testcase-data/overlay%d", nr); |
| buf[sizeof(buf) - 1] = '\0'; |
| |
| return buf; |
| } |
| |
| static const char *bus_path = "/testcase-data/overlay-node/test-bus"; |
| |
| /* it is guaranteed that overlay ids are assigned in sequence */ |
| #define MAX_UNITTEST_OVERLAYS 256 |
| static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)]; |
| static int overlay_first_id = -1; |
| |
| static void of_unittest_track_overlay(int id) |
| { |
| if (overlay_first_id < 0) |
| overlay_first_id = id; |
| id -= overlay_first_id; |
| |
| /* we shouldn't need that many */ |
| BUG_ON(id >= MAX_UNITTEST_OVERLAYS); |
| overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id); |
| } |
| |
| static void of_unittest_untrack_overlay(int id) |
| { |
| if (overlay_first_id < 0) |
| return; |
| id -= overlay_first_id; |
| BUG_ON(id >= MAX_UNITTEST_OVERLAYS); |
| overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id); |
| } |
| |
| static void of_unittest_destroy_tracked_overlays(void) |
| { |
| int id, ret, defers; |
| |
| if (overlay_first_id < 0) |
| return; |
| |
| /* try until no defers */ |
| do { |
| defers = 0; |
| /* remove in reverse order */ |
| for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) { |
| if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id))) |
| continue; |
| |
| ret = of_overlay_destroy(id + overlay_first_id); |
| if (ret == -ENODEV) { |
| pr_warn("%s: no overlay to destroy for #%d\n", |
| __func__, id + overlay_first_id); |
| continue; |
| } |
| if (ret != 0) { |
| defers++; |
| pr_warn("%s: overlay destroy failed for #%d\n", |
| __func__, id + overlay_first_id); |
| continue; |
| } |
| |
| overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id); |
| } |
| } while (defers > 0); |
| } |
| |
| static int of_unittest_apply_overlay(int overlay_nr, int unittest_nr, |
| int *overlay_id) |
| { |
| struct device_node *np = NULL; |
| int ret, id = -1; |
| |
| np = of_find_node_by_path(overlay_path(overlay_nr)); |
| if (np == NULL) { |
| unittest(0, "could not find overlay node @\"%s\"\n", |
| overlay_path(overlay_nr)); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = of_overlay_create(np); |
| if (ret < 0) { |
| unittest(0, "could not create overlay from \"%s\"\n", |
| overlay_path(overlay_nr)); |
| goto out; |
| } |
| id = ret; |
| of_unittest_track_overlay(id); |
| |
| ret = 0; |
| |
| out: |
| of_node_put(np); |
| |
| if (overlay_id) |
| *overlay_id = id; |
| |
| return ret; |
| } |
| |
| /* apply an overlay while checking before and after states */ |
| static int of_unittest_apply_overlay_check(int overlay_nr, int unittest_nr, |
| int before, int after, enum overlay_type ovtype) |
| { |
| int ret; |
| |
| /* unittest device must not be in before state */ |
| if (of_unittest_device_exists(unittest_nr, ovtype) != before) { |
| unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", |
| overlay_path(overlay_nr), |
| unittest_path(unittest_nr, ovtype), |
| !before ? "enabled" : "disabled"); |
| return -EINVAL; |
| } |
| |
| ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, NULL); |
| if (ret != 0) { |
| /* of_unittest_apply_overlay already called unittest() */ |
| return ret; |
| } |
| |
| /* unittest device must be to set to after state */ |
| if (of_unittest_device_exists(unittest_nr, ovtype) != after) { |
| unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n", |
| overlay_path(overlay_nr), |
| unittest_path(unittest_nr, ovtype), |
| !after ? "enabled" : "disabled"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /* apply an overlay and then revert it while checking before, after states */ |
| static int of_unittest_apply_revert_overlay_check(int overlay_nr, |
| int unittest_nr, int before, int after, |
| enum overlay_type ovtype) |
| { |
| int ret, ov_id; |
| |
| /* unittest device must be in before state */ |
| if (of_unittest_device_exists(unittest_nr, ovtype) != before) { |
| unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", |
| overlay_path(overlay_nr), |
| unittest_path(unittest_nr, ovtype), |
| !before ? "enabled" : "disabled"); |
| return -EINVAL; |
| } |
| |
| /* apply the overlay */ |
| ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ov_id); |
| if (ret != 0) { |
| /* of_unittest_apply_overlay already called unittest() */ |
| return ret; |
| } |
| |
| /* unittest device must be in after state */ |
| if (of_unittest_device_exists(unittest_nr, ovtype) != after) { |
| unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n", |
| overlay_path(overlay_nr), |
| unittest_path(unittest_nr, ovtype), |
| !after ? "enabled" : "disabled"); |
| return -EINVAL; |
| } |
| |
| ret = of_overlay_destroy(ov_id); |
| if (ret != 0) { |
| unittest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n", |
| overlay_path(overlay_nr), |
| unittest_path(unittest_nr, ovtype)); |
| return ret; |
| } |
| |
| /* unittest device must be again in before state */ |
| if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) { |
| unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", |
| overlay_path(overlay_nr), |
| unittest_path(unittest_nr, ovtype), |
| !before ? "enabled" : "disabled"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /* test activation of device */ |
| static void of_unittest_overlay_0(void) |
| { |
| int ret; |
| |
| /* device should enable */ |
| ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY); |
| if (ret != 0) |
| return; |
| |
| unittest(1, "overlay test %d passed\n", 0); |
| } |
| |
| /* test deactivation of device */ |
| static void of_unittest_overlay_1(void) |
| { |
| int ret; |
| |
| /* device should disable */ |
| ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY); |
| if (ret != 0) |
| return; |
| |
| unittest(1, "overlay test %d passed\n", 1); |
| } |
| |
| /* test activation of device */ |
| static void of_unittest_overlay_2(void) |
| { |
| int ret; |
| |
| /* device should enable */ |
| ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY); |
| if (ret != 0) |
| return; |
| |
| unittest(1, "overlay test %d passed\n", 2); |
| } |
| |
| /* test deactivation of device */ |
| static void of_unittest_overlay_3(void) |
| { |
| int ret; |
| |
| /* device should disable */ |
| ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY); |
| if (ret != 0) |
| return; |
| |
| unittest(1, "overlay test %d passed\n", 3); |
| } |
| |
| /* test activation of a full device node */ |
| static void of_unittest_overlay_4(void) |
| { |
| int ret; |
| |
| /* device should disable */ |
| ret = of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY); |
| if (ret != 0) |
| return; |
| |
| unittest(1, "overlay test %d passed\n", 4); |
| } |
| |
| /* test overlay apply/revert sequence */ |
| static void of_unittest_overlay_5(void) |
| { |
| int ret; |
| |
| /* device should disable */ |
| ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY); |
| if (ret != 0) |
| return; |
| |
| unittest(1, "overlay test %d passed\n", 5); |
| } |
| |
| /* test overlay application in sequence */ |
| static void of_unittest_overlay_6(void) |
| { |
| struct device_node *np; |
| int ret, i, ov_id[2]; |
| int overlay_nr = 6, unittest_nr = 6; |
| int before = 0, after = 1; |
| |
| /* unittest device must be in before state */ |
| for (i = 0; i < 2; i++) { |
| if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) |
| != before) { |
| unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", |
| overlay_path(overlay_nr + i), |
| unittest_path(unittest_nr + i, |
| PDEV_OVERLAY), |
| !before ? "enabled" : "disabled"); |
| return; |
| } |
| } |
| |
| /* apply the overlays */ |
| for (i = 0; i < 2; i++) { |
| |
| np = of_find_node_by_path(overlay_path(overlay_nr + i)); |
| if (np == NULL) { |
| unittest(0, "could not find overlay node @\"%s\"\n", |
| overlay_path(overlay_nr + i)); |
| return; |
| } |
| |
| ret = of_overlay_create(np); |
| if (ret < 0) { |
| unittest(0, "could not create overlay from \"%s\"\n", |
| overlay_path(overlay_nr + i)); |
| return; |
| } |
| ov_id[i] = ret; |
| of_unittest_track_overlay(ov_id[i]); |
| } |
| |
| for (i = 0; i < 2; i++) { |
| /* unittest device must be in after state */ |
| if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) |
| != after) { |
| unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n", |
| overlay_path(overlay_nr + i), |
| unittest_path(unittest_nr + i, |
| PDEV_OVERLAY), |
| !after ? "enabled" : "disabled"); |
| return; |
| } |
| } |
| |
| for (i = 1; i >= 0; i--) { |
| ret = of_overlay_destroy(ov_id[i]); |
| if (ret != 0) { |
| unittest(0, "overlay @\"%s\" failed destroy @\"%s\"\n", |
| overlay_path(overlay_nr + i), |
| unittest_path(unittest_nr + i, |
| PDEV_OVERLAY)); |
| return; |
| } |
| of_unittest_untrack_overlay(ov_id[i]); |
| } |
| |
| for (i = 0; i < 2; i++) { |
| /* unittest device must be again in before state */ |
| if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) |
| != before) { |
| unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", |
| overlay_path(overlay_nr + i), |
| unittest_path(unittest_nr + i, |
| PDEV_OVERLAY), |
| !before ? "enabled" : "disabled"); |
| return; |
| } |
| } |
| |
| unittest(1, "overlay test %d passed\n", 6); |
| } |
| |
| /* test overlay application in sequence */ |
| static void of_unittest_overlay_8(void) |
| { |
| struct device_node *np; |
| int ret, i, ov_id[2]; |
| int overlay_nr = 8, unittest_nr = 8; |
| |
| /* we don't care about device state in this test */ |
| |
| /* apply the overlays */ |
| for (i = 0; i < 2; i++) { |
| |
| np = of_find_node_by_path(overlay_path(overlay_nr + i)); |
| if (np == NULL) { |
| unittest(0, "could not find overlay node @\"%s\"\n", |
| overlay_path(overlay_nr + i)); |
| return; |
| } |
| |
| ret = of_overlay_create(np); |
| if (ret < 0) { |
| unittest(0, "could not create overlay from \"%s\"\n", |
| overlay_path(overlay_nr + i)); |
| return; |
| } |
| ov_id[i] = ret; |
| of_unittest_track_overlay(ov_id[i]); |
| } |
| |
| /* now try to remove first overlay (it should fail) */ |
| ret = of_overlay_destroy(ov_id[0]); |
| if (ret == 0) { |
| unittest(0, "overlay @\"%s\" was destroyed @\"%s\"\n", |
| overlay_path(overlay_nr + 0), |
| unittest_path(unittest_nr, |
| PDEV_OVERLAY)); |
| return; |
| } |
| |
| /* removing them in order should work */ |
| for (i = 1; i >= 0; i--) { |
| ret = of_overlay_destroy(ov_id[i]); |
| if (ret != 0) { |
| unittest(0, "overlay @\"%s\" not destroyed @\"%s\"\n", |
| overlay_path(overlay_nr + i), |
| unittest_path(unittest_nr, |
| PDEV_OVERLAY)); |
| return; |
| } |
| of_unittest_untrack_overlay(ov_id[i]); |
| } |
| |
| unittest(1, "overlay test %d passed\n", 8); |
| } |
| |
| /* test insertion of a bus with parent devices */ |
| static void of_unittest_overlay_10(void) |
| { |
| int ret; |
| char *child_path; |
| |
| /* device should disable */ |
| ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY); |
| if (unittest(ret == 0, |
| "overlay test %d failed; overlay application\n", 10)) |
| return; |
| |
| child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101", |
| unittest_path(10, PDEV_OVERLAY)); |
| if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10)) |
| return; |
| |
| ret = of_path_device_type_exists(child_path, PDEV_OVERLAY); |
| kfree(child_path); |
| if (unittest(ret, "overlay test %d failed; no child device\n", 10)) |
| return; |
| } |
| |
| /* test insertion of a bus with parent devices (and revert) */ |
| static void of_unittest_overlay_11(void) |
| { |
| int ret; |
| |
| /* device should disable */ |
| ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1, |
| PDEV_OVERLAY); |
| if (unittest(ret == 0, |
| "overlay test %d failed; overlay application\n", 11)) |
| return; |
| } |
| |
| #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY) |
| |
| struct unittest_i2c_bus_data { |
| struct platform_device *pdev; |
| struct i2c_adapter adap; |
| }; |
| |
| static int unittest_i2c_master_xfer(struct i2c_adapter *adap, |
| struct i2c_msg *msgs, int num) |
| { |
| struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap); |
| |
| (void)std; |
| |
| return num; |
| } |
| |
| static u32 unittest_i2c_functionality(struct i2c_adapter *adap) |
| { |
| return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; |
| } |
| |
| static const struct i2c_algorithm unittest_i2c_algo = { |
| .master_xfer = unittest_i2c_master_xfer, |
| .functionality = unittest_i2c_functionality, |
| }; |
| |
| static int unittest_i2c_bus_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct device_node *np = dev->of_node; |
| struct unittest_i2c_bus_data *std; |
| struct i2c_adapter *adap; |
| int ret; |
| |
| if (np == NULL) { |
| dev_err(dev, "No OF data for device\n"); |
| return -EINVAL; |
| |
| } |
| |
| dev_dbg(dev, "%s for node @%pOF\n", __func__, np); |
| |
| std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL); |
| if (!std) { |
| dev_err(dev, "Failed to allocate unittest i2c data\n"); |
| return -ENOMEM; |
| } |
| |
| /* link them together */ |
| std->pdev = pdev; |
| platform_set_drvdata(pdev, std); |
| |
| adap = &std->adap; |
| i2c_set_adapdata(adap, std); |
| adap->nr = -1; |
| strlcpy(adap->name, pdev->name, sizeof(adap->name)); |
| adap->class = I2C_CLASS_DEPRECATED; |
| adap->algo = &unittest_i2c_algo; |
| adap->dev.parent = dev; |
| adap->dev.of_node = dev->of_node; |
| adap->timeout = 5 * HZ; |
| adap->retries = 3; |
| |
| ret = i2c_add_numbered_adapter(adap); |
| if (ret != 0) { |
| dev_err(dev, "Failed to add I2C adapter\n"); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int unittest_i2c_bus_remove(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct device_node *np = dev->of_node; |
| struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev); |
| |
| dev_dbg(dev, "%s for node @%pOF\n", __func__, np); |
| i2c_del_adapter(&std->adap); |
| |
| return 0; |
| } |
| |
| static const struct of_device_id unittest_i2c_bus_match[] = { |
| { .compatible = "unittest-i2c-bus", }, |
| {}, |
| }; |
| |
| static struct platform_driver unittest_i2c_bus_driver = { |
| .probe = unittest_i2c_bus_probe, |
| .remove = unittest_i2c_bus_remove, |
| .driver = { |
| .name = "unittest-i2c-bus", |
| .of_match_table = of_match_ptr(unittest_i2c_bus_match), |
| }, |
| }; |
| |
| static int unittest_i2c_dev_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct device *dev = &client->dev; |
| struct device_node *np = client->dev.of_node; |
| |
| if (!np) { |
| dev_err(dev, "No OF node\n"); |
| return -EINVAL; |
| } |
| |
| dev_dbg(dev, "%s for node @%pOF\n", __func__, np); |
| |
| return 0; |
| }; |
| |
| static int unittest_i2c_dev_remove(struct i2c_client *client) |
| { |
| struct device *dev = &client->dev; |
| struct device_node *np = client->dev.of_node; |
| |
| dev_dbg(dev, "%s for node @%pOF\n", __func__, np); |
| return 0; |
| } |
| |
| static const struct i2c_device_id unittest_i2c_dev_id[] = { |
| { .name = "unittest-i2c-dev" }, |
| { } |
| }; |
| |
| static struct i2c_driver unittest_i2c_dev_driver = { |
| .driver = { |
| .name = "unittest-i2c-dev", |
| }, |
| .probe = unittest_i2c_dev_probe, |
| .remove = unittest_i2c_dev_remove, |
| .id_table = unittest_i2c_dev_id, |
| }; |
| |
| #if IS_BUILTIN(CONFIG_I2C_MUX) |
| |
| static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan) |
| { |
| return 0; |
| } |
| |
| static int unittest_i2c_mux_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| int ret, i, nchans; |
| struct device *dev = &client->dev; |
| struct i2c_adapter *adap = to_i2c_adapter(dev->parent); |
| struct device_node *np = client->dev.of_node, *child; |
| struct i2c_mux_core *muxc; |
| u32 reg, max_reg; |
| |
| dev_dbg(dev, "%s for node @%pOF\n", __func__, np); |
| |
| if (!np) { |
| dev_err(dev, "No OF node\n"); |
| return -EINVAL; |
| } |
| |
| max_reg = (u32)-1; |
| for_each_child_of_node(np, child) { |
| ret = of_property_read_u32(child, "reg", ®); |
| if (ret) |
| continue; |
| if (max_reg == (u32)-1 || reg > max_reg) |
| max_reg = reg; |
| } |
| nchans = max_reg == (u32)-1 ? 0 : max_reg + 1; |
| if (nchans == 0) { |
| dev_err(dev, "No channels\n"); |
| return -EINVAL; |
| } |
| |
| muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0, |
| unittest_i2c_mux_select_chan, NULL); |
| if (!muxc) |
| return -ENOMEM; |
| for (i = 0; i < nchans; i++) { |
| ret = i2c_mux_add_adapter(muxc, 0, i, 0); |
| if (ret) { |
| dev_err(dev, "Failed to register mux #%d\n", i); |
| i2c_mux_del_adapters(muxc); |
| return -ENODEV; |
| } |
| } |
| |
| i2c_set_clientdata(client, muxc); |
| |
| return 0; |
| }; |
| |
| static int unittest_i2c_mux_remove(struct i2c_client *client) |
| { |
| struct device *dev = &client->dev; |
| struct device_node *np = client->dev.of_node; |
| struct i2c_mux_core *muxc = i2c_get_clientdata(client); |
| |
| dev_dbg(dev, "%s for node @%pOF\n", __func__, np); |
| i2c_mux_del_adapters(muxc); |
| return 0; |
| } |
| |
| static const struct i2c_device_id unittest_i2c_mux_id[] = { |
| { .name = "unittest-i2c-mux" }, |
| { } |
| }; |
| |
| static struct i2c_driver unittest_i2c_mux_driver = { |
| .driver = { |
| .name = "unittest-i2c-mux", |
| }, |
| .probe = unittest_i2c_mux_probe, |
| .remove = unittest_i2c_mux_remove, |
| .id_table = unittest_i2c_mux_id, |
| }; |
| |
| #endif |
| |
| static int of_unittest_overlay_i2c_init(void) |
| { |
| int ret; |
| |
| ret = i2c_add_driver(&unittest_i2c_dev_driver); |
| if (unittest(ret == 0, |
| "could not register unittest i2c device driver\n")) |
| return ret; |
| |
| ret = platform_driver_register(&unittest_i2c_bus_driver); |
| if (unittest(ret == 0, |
| "could not register unittest i2c bus driver\n")) |
| return ret; |
| |
| #if IS_BUILTIN(CONFIG_I2C_MUX) |
| ret = i2c_add_driver(&unittest_i2c_mux_driver); |
| if (unittest(ret == 0, |
| "could not register unittest i2c mux driver\n")) |
| return ret; |
| #endif |
| |
| return 0; |
| } |
| |
| static void of_unittest_overlay_i2c_cleanup(void) |
| { |
| #if IS_BUILTIN(CONFIG_I2C_MUX) |
| i2c_del_driver(&unittest_i2c_mux_driver); |
| #endif |
| platform_driver_unregister(&unittest_i2c_bus_driver); |
| i2c_del_driver(&unittest_i2c_dev_driver); |
| } |
| |
| static void of_unittest_overlay_i2c_12(void) |
| { |
| int ret; |
| |
| /* device should enable */ |
| ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY); |
| if (ret != 0) |
| return; |
| |
| unittest(1, "overlay test %d passed\n", 12); |
| } |
| |
| /* test deactivation of device */ |
| static void of_unittest_overlay_i2c_13(void) |
| { |
| int ret; |
| |
| /* device should disable */ |
| ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY); |
| if (ret != 0) |
| return; |
| |
| unittest(1, "overlay test %d passed\n", 13); |
| } |
| |
| /* just check for i2c mux existence */ |
| static void of_unittest_overlay_i2c_14(void) |
| { |
| } |
| |
| static void of_unittest_overlay_i2c_15(void) |
| { |
| int ret; |
| |
| /* device should enable */ |
| ret = of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY); |
| if (ret != 0) |
| return; |
| |
| unittest(1, "overlay test %d passed\n", 15); |
| } |
| |
| #else |
| |
| static inline void of_unittest_overlay_i2c_14(void) { } |
| static inline void of_unittest_overlay_i2c_15(void) { } |
| |
| #endif |
| |
| static void __init of_unittest_overlay(void) |
| { |
| struct device_node *bus_np = NULL; |
| int ret; |
| |
| ret = platform_driver_register(&unittest_driver); |
| if (ret != 0) { |
| unittest(0, "could not register unittest driver\n"); |
| goto out; |
| } |
| |
| bus_np = of_find_node_by_path(bus_path); |
| if (bus_np == NULL) { |
| unittest(0, "could not find bus_path \"%s\"\n", bus_path); |
| goto out; |
| } |
| |
| ret = of_platform_default_populate(bus_np, NULL, NULL); |
| if (ret != 0) { |
| unittest(0, "could not populate bus @ \"%s\"\n", bus_path); |
| goto out; |
| } |
| |
| if (!of_unittest_device_exists(100, PDEV_OVERLAY)) { |
| unittest(0, "could not find unittest0 @ \"%s\"\n", |
| unittest_path(100, PDEV_OVERLAY)); |
| goto out; |
| } |
| |
| if (of_unittest_device_exists(101, PDEV_OVERLAY)) { |
| unittest(0, "unittest1 @ \"%s\" should not exist\n", |
| unittest_path(101, PDEV_OVERLAY)); |
| goto out; |
| } |
| |
| unittest(1, "basic infrastructure of overlays passed"); |
| |
| /* tests in sequence */ |
| of_unittest_overlay_0(); |
| of_unittest_overlay_1(); |
| of_unittest_overlay_2(); |
| of_unittest_overlay_3(); |
| of_unittest_overlay_4(); |
| of_unittest_overlay_5(); |
| of_unittest_overlay_6(); |
| of_unittest_overlay_8(); |
| |
| of_unittest_overlay_10(); |
| of_unittest_overlay_11(); |
| |
| #if IS_BUILTIN(CONFIG_I2C) |
| if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n")) |
| goto out; |
| |
| of_unittest_overlay_i2c_12(); |
| of_unittest_overlay_i2c_13(); |
| of_unittest_overlay_i2c_14(); |
| of_unittest_overlay_i2c_15(); |
| |
| of_unittest_overlay_i2c_cleanup(); |
| #endif |
| |
| of_unittest_destroy_tracked_overlays(); |
| |
| out: |
| of_node_put(bus_np); |
| } |
| |
| #else |
| static inline void __init of_unittest_overlay(void) { } |
| #endif |
| |
| #ifdef CONFIG_OF_OVERLAY |
| |
| /* |
| * __dtb_ot_begin[] and __dtb_ot_end[] are created by cmd_dt_S_dtb |
| * in scripts/Makefile.lib |
| */ |
| |
| #define OVERLAY_INFO_EXTERN(name) \ |
| extern uint8_t __dtb_##name##_begin[]; \ |
| extern uint8_t __dtb_##name##_end[] |
| |
| #define OVERLAY_INFO(name, expected) \ |
| { .dtb_begin = __dtb_##name##_begin, \ |
| .dtb_end = __dtb_##name##_end, \ |
| .expected_result = expected, \ |
| } |
| |
| struct overlay_info { |
| uint8_t *dtb_begin; |
| uint8_t *dtb_end; |
| void *data; |
| struct device_node *np_overlay; |
| int expected_result; |
| int overlay_id; |
| }; |
| |
| OVERLAY_INFO_EXTERN(overlay_base); |
| OVERLAY_INFO_EXTERN(overlay); |
| OVERLAY_INFO_EXTERN(overlay_bad_phandle); |
| OVERLAY_INFO_EXTERN(overlay_bad_symbol); |
| |
| /* order of entries is hard-coded into users of overlays[] */ |
| static struct overlay_info overlays[] = { |
| OVERLAY_INFO(overlay_base, -9999), |
| OVERLAY_INFO(overlay, 0), |
| OVERLAY_INFO(overlay_bad_phandle, -EINVAL), |
| OVERLAY_INFO(overlay_bad_symbol, -EINVAL), |
| {} |
| }; |
| |
| static struct device_node *overlay_base_root; |
| |
| /* |
| * Create base device tree for the overlay unittest. |
| * |
| * This is called from very early boot code. |
| * |
| * Do as much as possible the same way as done in __unflatten_device_tree |
| * and other early boot steps for the normal FDT so that the overlay base |
| * unflattened tree will have the same characteristics as the real tree |
| * (such as having memory allocated by the early allocator). The goal |
| * is to test "the real thing" as much as possible, and test "test setup |
| * code" as little as possible. |
| * |
| * Have to stop before resolving phandles, because that uses kmalloc. |
| */ |
| void __init unittest_unflatten_overlay_base(void) |
| { |
| struct overlay_info *info; |
| u32 data_size; |
| u32 size; |
| |
| info = &overlays[0]; |
| |
| if (info->expected_result != -9999) { |
| pr_err("No dtb 'overlay_base' to attach\n"); |
| return; |
| } |
| |
| data_size = info->dtb_end - info->dtb_begin; |
| if (!data_size) { |
| pr_err("No dtb 'overlay_base' to attach\n"); |
| return; |
| } |
| |
| size = fdt_totalsize(info->dtb_begin); |
| if (size != data_size) { |
| pr_err("dtb 'overlay_base' header totalsize != actual size"); |
| return; |
| } |
| |
| info->data = early_init_dt_alloc_memory_arch(size, |
| roundup_pow_of_two(FDT_V17_SIZE)); |
| if (!info->data) { |
| pr_err("alloc for dtb 'overlay_base' failed"); |
| return; |
| } |
| |
| memcpy(info->data, info->dtb_begin, size); |
| |
| __unflatten_device_tree(info->data, NULL, &info->np_overlay, |
| early_init_dt_alloc_memory_arch, true); |
| overlay_base_root = info->np_overlay; |
| } |
| |
| /* |
| * The purpose of of_unittest_overlay_data_add is to add an |
| * overlay in the normal fashion. This is a test of the whole |
| * picture, instead of testing individual elements. |
| * |
| * A secondary purpose is to be able to verify that the contents of |
| * /proc/device-tree/ contains the updated structure and values from |
| * the overlay. That must be verified separately in user space. |
| * |
| * Return 0 on unexpected error. |
| */ |
| static int __init overlay_data_add(int onum) |
| { |
| struct overlay_info *info; |
| int k; |
| int ret; |
| u32 size; |
| u32 size_from_header; |
| |
| for (k = 0, info = overlays; info; info++, k++) { |
| if (k == onum) |
| break; |
| } |
| if (onum > k) |
| return 0; |
| |
| size = info->dtb_end - info->dtb_begin; |
| if (!size) { |
| pr_err("no overlay to attach, %d\n", onum); |
| ret = 0; |
| } |
| |
| size_from_header = fdt_totalsize(info->dtb_begin); |
| if (size_from_header != size) { |
| pr_err("overlay header totalsize != actual size, %d", onum); |
| return 0; |
| } |
| |
| /* |
| * Must create permanent copy of FDT because of_fdt_unflatten_tree() |
| * will create pointers to the passed in FDT in the EDT. |
| */ |
| info->data = kmemdup(info->dtb_begin, size, GFP_KERNEL); |
| if (!info->data) { |
| pr_err("unable to allocate memory for data, %d\n", onum); |
| return 0; |
| } |
| |
| of_fdt_unflatten_tree(info->data, NULL, &info->np_overlay); |
| if (!info->np_overlay) { |
| pr_err("unable to unflatten overlay, %d\n", onum); |
| ret = 0; |
| goto out_free_data; |
| } |
| of_node_set_flag(info->np_overlay, OF_DETACHED); |
| |
| ret = of_resolve_phandles(info->np_overlay); |
| if (ret) { |
| pr_err("resolve ot phandles (ret=%d), %d\n", ret, onum); |
| goto out_free_np_overlay; |
| } |
| |
| ret = of_overlay_create(info->np_overlay); |
| if (ret < 0) { |
| pr_err("of_overlay_create() (ret=%d), %d\n", ret, onum); |
| goto out_free_np_overlay; |
| } else { |
| info->overlay_id = ret; |
| ret = 0; |
| } |
| |
| pr_debug("__dtb_overlay_begin applied, overlay id %d\n", ret); |
| |
| goto out; |
| |
| out_free_np_overlay: |
| /* |
| * info->np_overlay is the unflattened device tree |
| * It has not been spliced into the live tree. |
| */ |
| |
| /* todo: function to free unflattened device tree */ |
| |
| out_free_data: |
| kfree(info->data); |
| |
| out: |
| return (ret == info->expected_result); |
| } |
| |
| /* |
| * The purpose of of_unittest_overlay_high_level is to add an overlay |
| * in the normal fashion. This is a test of the whole picture, |
| * instead of individual elements. |
| * |
| * The first part of the function is _not_ normal overlay usage; it is |
| * finishing splicing the base overlay device tree into the live tree. |
| */ |
| static __init void of_unittest_overlay_high_level(void) |
| { |
| struct device_node *last_sibling; |
| struct device_node *np; |
| struct device_node *of_symbols; |
| struct device_node *overlay_base_symbols; |
| struct device_node **pprev; |
| struct property *prop; |
| int ret; |
| |
| if (!overlay_base_root) { |
| unittest(0, "overlay_base_root not initialized\n"); |
| return; |
| } |
| |
| /* |
| * Could not fixup phandles in unittest_unflatten_overlay_base() |
| * because kmalloc() was not yet available. |
| */ |
| of_resolve_phandles(overlay_base_root); |
| |
| /* |
| * do not allow overlay_base to duplicate any node already in |
| * tree, this greatly simplifies the code |
| */ |
| |
| /* |
| * remove overlay_base_root node "__local_fixups", after |
| * being used by of_resolve_phandles() |
| */ |
| pprev = &overlay_base_root->child; |
| for (np = overlay_base_root->child; np; np = np->sibling) { |
| if (!of_node_cmp(np->name, "__local_fixups__")) { |
| *pprev = np->sibling; |
| break; |
| } |
| pprev = &np->sibling; |
| } |
| |
| /* remove overlay_base_root node "__symbols__" if in live tree */ |
| of_symbols = of_get_child_by_name(of_root, "__symbols__"); |
| if (of_symbols) { |
| /* will have to graft properties from node into live tree */ |
| pprev = &overlay_base_root->child; |
| for (np = overlay_base_root->child; np; np = np->sibling) { |
| if (!of_node_cmp(np->name, "__symbols__")) { |
| overlay_base_symbols = np; |
| *pprev = np->sibling; |
| break; |
| } |
| pprev = &np->sibling; |
| } |
| } |
| |
| for (np = overlay_base_root->child; np; np = np->sibling) { |
| if (of_get_child_by_name(of_root, np->name)) { |
| unittest(0, "illegal node name in overlay_base %s", |
| np->name); |
| return; |
| } |
| } |
| |
| /* |
| * overlay 'overlay_base' is not allowed to have root |
| * properties, so only need to splice nodes into main device tree. |
| * |
| * root node of *overlay_base_root will not be freed, it is lost |
| * memory. |
| */ |
| |
| for (np = overlay_base_root->child; np; np = np->sibling) |
| np->parent = of_root; |
| |
| mutex_lock(&of_mutex); |
| |
| for (last_sibling = np = of_root->child; np; np = np->sibling) |
| last_sibling = np; |
| |
| if (last_sibling) |
| last_sibling->sibling = overlay_base_root->child; |
| else |
| of_root->child = overlay_base_root->child; |
| |
| for_each_of_allnodes_from(overlay_base_root, np) |
| __of_attach_node_sysfs(np); |
| |
| if (of_symbols) { |
| for_each_property_of_node(overlay_base_symbols, prop) { |
| ret = __of_add_property(of_symbols, prop); |
| if (ret) { |
| unittest(0, |
| "duplicate property '%s' in overlay_base node __symbols__", |
| prop->name); |
| goto err_unlock; |
| } |
| ret = __of_add_property_sysfs(of_symbols, prop); |
| if (ret) { |
| unittest(0, |
| "unable to add property '%s' in overlay_base node __symbols__ to sysfs", |
| prop->name); |
| goto err_unlock; |
| } |
| } |
| } |
| |
| mutex_unlock(&of_mutex); |
| |
| |
| /* now do the normal overlay usage test */ |
| |
| unittest(overlay_data_add(1), |
| "Adding overlay 'overlay' failed\n"); |
| |
| unittest(overlay_data_add(2), |
| "Adding overlay 'overlay_bad_phandle' failed\n"); |
| |
| unittest(overlay_data_add(3), |
| "Adding overlay 'overlay_bad_symbol' failed\n"); |
| |
| return; |
| |
| err_unlock: |
| mutex_unlock(&of_mutex); |
| } |
| |
| #else |
| |
| static inline __init void of_unittest_overlay_high_level(void) {} |
| |
| #endif |
| |
| static int __init of_unittest(void) |
| { |
| struct device_node *np; |
| int res; |
| |
| /* adding data for unittest */ |
| res = unittest_data_add(); |
| if (res) |
| return res; |
| if (!of_aliases) |
| of_aliases = of_find_node_by_path("/aliases"); |
| |
| 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 unittest - you will see error messages\n"); |
| of_unittest_check_tree_linkage(); |
| of_unittest_check_phandles(); |
| of_unittest_find_node_by_name(); |
| of_unittest_dynamic(); |
| of_unittest_parse_phandle_with_args(); |
| of_unittest_printf(); |
| of_unittest_property_string(); |
| of_unittest_property_copy(); |
| of_unittest_changeset(); |
| of_unittest_parse_interrupts(); |
| of_unittest_parse_interrupts_extended(); |
| of_unittest_match_node(); |
| of_unittest_platform_populate(); |
| of_unittest_overlay(); |
| |
| /* Double check linkage after removing testcase data */ |
| of_unittest_check_tree_linkage(); |
| |
| of_unittest_overlay_high_level(); |
| |
| pr_info("end of unittest - %i passed, %i failed\n", |
| unittest_results.passed, unittest_results.failed); |
| |
| return 0; |
| } |
| late_initcall(of_unittest); |