diff options
Diffstat (limited to 'drivers/of/unittest.c')
| -rw-r--r-- | drivers/of/unittest.c | 1970 |
1 files changed, 1970 insertions, 0 deletions
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c new file mode 100644 index 000000000..18016341d --- /dev/null +++ b/drivers/of/unittest.c @@ -0,0 +1,1970 @@ +/* + * 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/module.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/of_platform.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; + + np = of_find_node_by_path("/testcase-data"); + unittest(np && !strcmp("/testcase-data", np->full_name), + "find /testcase-data failed\n"); + of_node_put(np); + + /* 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"); + unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name), + "find /testcase-data/phandle-tests/consumer-a failed\n"); + of_node_put(np); + + np = of_find_node_by_path("testcase-alias"); + unittest(np && !strcmp("/testcase-data", np->full_name), + "find testcase-alias failed\n"); + of_node_put(np); + + /* 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"); + unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name), + "find testcase-alias/phandle-tests/consumer-a failed\n"); + of_node_put(np); + + np = of_find_node_by_path("/testcase-data/missing-path"); + unittest(!np, "non-existent path returned node %s\n", np->full_name); + of_node_put(np); + + np = of_find_node_by_path("missing-alias"); + unittest(!np, "non-existent alias returned node %s\n", np->full_name); + of_node_put(np); + + np = of_find_node_by_path("testcase-alias/missing-path"); + unittest(!np, "non-existent alias with relative path returned node %s\n", np->full_name); + 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); + 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); + 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); + 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); + 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); + return -EINVAL; + } + + rc = of_unittest_check_node_linkage(child); + if (rc < 0) + return rc; + count += rc; + } + + return count + 1; +} + +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); +} + +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 %s and %s\n", + np->phandle, nh->np->full_name, np->full_name); + 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 %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); + 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"); + mutex_lock(&of_mutex); + unittest(!of_changeset_apply(&chgset), "apply failed\n"); + mutex_unlock(&of_mutex); + + /* Make sure node names are constructed correctly */ + unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")), + "'%s' not added\n", n21->full_name); + of_node_put(np); + + mutex_lock(&of_mutex); + unittest(!of_changeset_revert(&chgset), "revert failed\n"); + mutex_unlock(&of_mutex); + + 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; + + 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 %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; + } + unittest(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_unittest_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; + } + + unittest(passed, "index %i - data error on node %s rc=%i\n", + i, args.np->full_name, 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 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_populate(np, of_default_bus_match_table, 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"); + + 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; + + 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 already present in 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 device_node *child; + + for_each_property_of_node(np, prop) + of_add_property(dup, prop); + + for_each_child_of_node(np, child) + child->parent = dup; +} + +/** + * attach_node_and_children - attaches nodes + * and its children to live tree + * + * @np: Node to attach to live tree + */ +static int attach_node_and_children(struct device_node *np) +{ + struct device_node *next, *dup, *child; + unsigned long flags; + + dup = of_find_node_by_path(np->full_name); + if (dup) { + update_node_properties(np, dup); + return 0; + } + + 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; + } + + return 0; +} + +/** + * 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, &unittest_data_node); + if (!unittest_data_node) { + pr_warn("%s: No tree to attach; not running tests\n", __func__); + 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 @%s\n", __func__, np->full_name); + + 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 @%s\n", __func__, np->full_name); + 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", + .owner = THIS_MODULE, + .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 != 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 unittest_nr, int overlay_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 @%s\n", __func__, np->full_name); + + 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 @%s\n", __func__, np->full_name); + 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 @%s\n", __func__, np->full_name); + + 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 @%s\n", __func__, np->full_name); + 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", + .owner = THIS_MODULE, + }, + .probe = unittest_i2c_dev_probe, + .remove = unittest_i2c_dev_remove, + .id_table = unittest_i2c_dev_id, +}; + +#if IS_BUILTIN(CONFIG_I2C_MUX) + +struct unittest_i2c_mux_data { + int nchans; + struct i2c_adapter *adap[]; +}; + +static int unittest_i2c_mux_select_chan(struct i2c_adapter *adap, + void *client, u32 chan) +{ + return 0; +} + +static int unittest_i2c_mux_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret, i, nchans, size; + struct device *dev = &client->dev; + struct i2c_adapter *adap = to_i2c_adapter(dev->parent); + struct device_node *np = client->dev.of_node, *child; + struct unittest_i2c_mux_data *stm; + u32 reg, max_reg; + + dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); + + 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; + } + + size = offsetof(struct unittest_i2c_mux_data, adap[nchans]); + stm = devm_kzalloc(dev, size, GFP_KERNEL); + if (!stm) { + dev_err(dev, "Out of memory\n"); + return -ENOMEM; + } + stm->nchans = nchans; + for (i = 0; i < nchans; i++) { + stm->adap[i] = i2c_add_mux_adapter(adap, dev, client, + 0, i, 0, unittest_i2c_mux_select_chan, NULL); + if (!stm->adap[i]) { + dev_err(dev, "Failed to register mux #%d\n", i); + for (i--; i >= 0; i--) + i2c_del_mux_adapter(stm->adap[i]); + return -ENODEV; + } + } + + i2c_set_clientdata(client, stm); + + 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 unittest_i2c_mux_data *stm = i2c_get_clientdata(client); + int i; + + dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); + for (i = stm->nchans - 1; i >= 0; i--) + i2c_del_mux_adapter(stm->adap[i]); + 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", + .owner = THIS_MODULE, + }, + .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(16, 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_populate(bus_np, of_default_bus_match_table, + 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 + +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_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(); + + pr_info("end of unittest - %i passed, %i failed\n", + unittest_results.passed, unittest_results.failed); + + return 0; +} +late_initcall(of_unittest); |