From: Frank Rowand <[email protected]> Move of_unittest.c into unittest-data/
This is based on v4.0-rc3. All checkpatch errors are ignored, as this is just a file move. At least two of the checkpatch errors appear to be real bugs, to be addressed in a future patch. Signed-off-by: Frank Rowand <[email protected]> --- drivers/of/unittest-data/unittest.c | 1879 ++++++++++++++++++++++++++++++++++++ drivers/of/unittest.c | 1879 ------------------------------------ 2 files changed, 1879 insertions(+), 1879 deletions(-) Index: b/drivers/of/unittest-data/unittest.c =================================================================== --- /dev/null +++ b/drivers/of/unittest-data/unittest.c @@ -0,0 +1,1879 @@ +/* + * 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 "of_private.h" + +static struct selftest_results { + int passed; + int failed; +} selftest_results; + +#define selftest(result, fmt, ...) ({ \ + bool failed = !(result); \ + if (failed) { \ + selftest_results.failed++; \ + pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \ + } else { \ + selftest_results.passed++; \ + pr_debug("pass %s():%i\n", __func__, __LINE__); \ + } \ + failed; \ +}) + +static void __init of_selftest_find_node_by_name(void) +{ + struct device_node *np; + const char *options; + + np = of_find_node_by_path("/testcase-data"); + selftest(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/"); + selftest(!np, "trailing '/' on /testcase-data/ should fail\n"); + + np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); + selftest(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"); + selftest(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/"); + selftest(!np, "trailing '/' on testcase-alias/ should fail\n"); + + np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a"); + selftest(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"); + selftest(!np, "non-existent path returned node %s\n", np->full_name); + of_node_put(np); + + np = of_find_node_by_path("missing-alias"); + selftest(!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"); + selftest(!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); + selftest(np && !strcmp("testoption", options), + "option path test failed\n"); + of_node_put(np); + + np = of_find_node_opts_by_path("/testcase-data:testoption", NULL); + selftest(np, "NULL option path test failed\n"); + of_node_put(np); + + np = of_find_node_opts_by_path("testcase-alias:testaliasoption", + &options); + selftest(np && !strcmp("testaliasoption", options), + "option alias path test failed\n"); + of_node_put(np); + + np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL); + selftest(np, "NULL option alias path test failed\n"); + of_node_put(np); + + options = "testoption"; + np = of_find_node_opts_by_path("testcase-alias", &options); + selftest(np && !options, "option clearing test failed\n"); + of_node_put(np); + + options = "testoption"; + np = of_find_node_opts_by_path("/", &options); + selftest(np && !options, "option clearing root node test failed\n"); + of_node_put(np); +} + +static void __init of_selftest_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) { + selftest(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); + selftest(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); + selftest(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); + selftest(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); + selftest(of_update_property(np, prop) == 0, + "Updating a missing property should have passed\n"); + + /* Remove property - should pass */ + selftest(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); + selftest(prop->value != NULL, "Unable to allocate large buffer\n"); + if (prop->value) + selftest(of_add_property(np, prop) == 0, + "Adding a large property should have passed\n"); +} + +static int __init of_selftest_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_selftest_check_node_linkage(child); + if (rc < 0) + return rc; + count += rc; + } + + return count + 1; +} + +static void __init of_selftest_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_selftest_check_node_linkage(of_root); + + selftest(child_count > 0, "Device node data structure is corrupted\n"); + selftest(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_selftest_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++; + } + selftest(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_selftest_parse_phandle_with_args(void) +{ + struct device_node *np; + struct of_phandle_args args; + int i, rc; + + np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); + if (!np) { + pr_err("missing testcase data\n"); + return; + } + + rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells"); + selftest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc); + + for (i = 0; i < 8; i++) { + bool passed = true; + rc = of_parse_phandle_with_args(np, "phandle-list", + "#phandle-cells", i, &args); + + /* Test the values from tests-phandle.dtsi */ + switch (i) { + case 0: + passed &= !rc; + passed &= (args.args_count == 1); + passed &= (args.args[0] == (i + 1)); + break; + case 1: + passed &= !rc; + passed &= (args.args_count == 2); + passed &= (args.args[0] == (i + 1)); + passed &= (args.args[1] == 0); + break; + case 2: + passed &= (rc == -ENOENT); + break; + case 3: + passed &= !rc; + passed &= (args.args_count == 3); + passed &= (args.args[0] == (i + 1)); + passed &= (args.args[1] == 4); + passed &= (args.args[2] == 3); + break; + case 4: + passed &= !rc; + passed &= (args.args_count == 2); + passed &= (args.args[0] == (i + 1)); + passed &= (args.args[1] == 100); + break; + case 5: + passed &= !rc; + passed &= (args.args_count == 0); + break; + case 6: + passed &= !rc; + passed &= (args.args_count == 1); + passed &= (args.args[0] == (i + 1)); + break; + case 7: + passed &= (rc == -ENOENT); + break; + default: + passed = false; + } + + selftest(passed, "index %i - data error on node %s rc=%i\n", + i, args.np->full_name, rc); + } + + /* Check for missing list property */ + rc = of_parse_phandle_with_args(np, "phandle-list-missing", + "#phandle-cells", 0, &args); + selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); + rc = of_count_phandle_with_args(np, "phandle-list-missing", + "#phandle-cells"); + selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); + + /* Check for missing cells property */ + rc = of_parse_phandle_with_args(np, "phandle-list", + "#phandle-cells-missing", 0, &args); + selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); + rc = of_count_phandle_with_args(np, "phandle-list", + "#phandle-cells-missing"); + selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); + + /* Check for bad phandle in list */ + rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle", + "#phandle-cells", 0, &args); + selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); + rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle", + "#phandle-cells"); + selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); + + /* Check for incorrectly formed argument list */ + rc = of_parse_phandle_with_args(np, "phandle-list-bad-args", + "#phandle-cells", 1, &args); + selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); + rc = of_count_phandle_with_args(np, "phandle-list-bad-args", + "#phandle-cells"); + selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); +} + +static void __init of_selftest_property_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"); + selftest(rc == 0, "first expected:0 got:%i\n", rc); + rc = of_property_match_string(np, "phandle-list-names", "second"); + selftest(rc == 1, "second expected:0 got:%i\n", rc); + rc = of_property_match_string(np, "phandle-list-names", "third"); + selftest(rc == 2, "third expected:0 got:%i\n", rc); + rc = of_property_match_string(np, "phandle-list-names", "fourth"); + selftest(rc == -ENODATA, "unmatched string; rc=%i\n", rc); + rc = of_property_match_string(np, "missing-property", "blah"); + selftest(rc == -EINVAL, "missing property; rc=%i\n", rc); + rc = of_property_match_string(np, "empty-property", "blah"); + selftest(rc == -ENODATA, "empty property; rc=%i\n", rc); + rc = of_property_match_string(np, "unterminated-string", "blah"); + selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); + + /* of_property_count_strings() tests */ + rc = of_property_count_strings(np, "string-property"); + selftest(rc == 1, "Incorrect string count; rc=%i\n", rc); + rc = of_property_count_strings(np, "phandle-list-names"); + selftest(rc == 3, "Incorrect string count; rc=%i\n", rc); + rc = of_property_count_strings(np, "unterminated-string"); + selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); + rc = of_property_count_strings(np, "unterminated-string-list"); + selftest(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); + selftest(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); + selftest(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); + selftest(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); + selftest(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); + selftest(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); + selftest(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); + selftest(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); + selftest(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 */ + selftest(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); + selftest(rc == 1, "Incorrect string count; rc=%i\n", rc); + rc = of_property_read_string_array(np, "phandle-list-names", strings, 4); + selftest(rc == 3, "Incorrect string count; rc=%i\n", rc); + rc = of_property_read_string_array(np, "unterminated-string", strings, 4); + selftest(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); + selftest(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); + selftest(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); + selftest(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_selftest_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); + selftest(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); + selftest(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_selftest_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; + + of_changeset_init(&chgset); + n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1"); + selftest(n1, "testcase setup failure\n"); + n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2"); + selftest(n2, "testcase setup failure\n"); + n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21"); + selftest(n21, "testcase setup failure %p\n", n21); + nremove = of_find_node_by_path("/testcase-data/changeset/node-remove"); + selftest(nremove, "testcase setup failure\n"); + ppadd = __of_prop_dup(&padd, GFP_KERNEL); + selftest(ppadd, "testcase setup failure\n"); + ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL); + selftest(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); + selftest(ppremove, "failed to find removal prop"); + + of_changeset_init(&chgset); + selftest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n"); + selftest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n"); + selftest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n"); + selftest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n"); + selftest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n"); + selftest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n"); + selftest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n"); + mutex_lock(&of_mutex); + selftest(!of_changeset_apply(&chgset), "apply failed\n"); + mutex_unlock(&of_mutex); + + /* Make sure node names are constructed correctly */ + selftest((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); + selftest(!of_changeset_revert(&chgset), "revert failed\n"); + mutex_unlock(&of_mutex); + + of_changeset_destroy(&chgset); +#endif +} + +static void __init of_selftest_parse_interrupts(void) +{ + struct device_node *np; + struct of_phandle_args args; + int i, rc; + + np = of_find_node_by_path("/testcase-data/interrupts/interrupts0"); + if (!np) { + pr_err("missing testcase data\n"); + return; + } + + for (i = 0; i < 4; i++) { + bool passed = true; + args.args_count = 0; + rc = of_irq_parse_one(np, i, &args); + + passed &= !rc; + passed &= (args.args_count == 1); + passed &= (args.args[0] == (i + 1)); + + selftest(passed, "index %i - data error on node %s rc=%i\n", + i, args.np->full_name, rc); + } + of_node_put(np); + + np = of_find_node_by_path("/testcase-data/interrupts/interrupts1"); + if (!np) { + pr_err("missing testcase data\n"); + return; + } + + for (i = 0; i < 4; i++) { + bool passed = true; + args.args_count = 0; + rc = of_irq_parse_one(np, i, &args); + + /* Test the values from tests-phandle.dtsi */ + switch (i) { + case 0: + passed &= !rc; + passed &= (args.args_count == 1); + passed &= (args.args[0] == 9); + break; + case 1: + passed &= !rc; + passed &= (args.args_count == 3); + passed &= (args.args[0] == 10); + passed &= (args.args[1] == 11); + passed &= (args.args[2] == 12); + break; + case 2: + passed &= !rc; + passed &= (args.args_count == 2); + passed &= (args.args[0] == 13); + passed &= (args.args[1] == 14); + break; + case 3: + passed &= !rc; + passed &= (args.args_count == 2); + passed &= (args.args[0] == 15); + passed &= (args.args[1] == 16); + break; + default: + passed = false; + } + selftest(passed, "index %i - data error on node %s rc=%i\n", + i, args.np->full_name, rc); + } + of_node_put(np); +} + +static void __init of_selftest_parse_interrupts_extended(void) +{ + struct device_node *np; + struct of_phandle_args args; + int i, rc; + + np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0"); + if (!np) { + pr_err("missing testcase data\n"); + return; + } + + for (i = 0; i < 7; i++) { + bool passed = true; + rc = of_irq_parse_one(np, i, &args); + + /* Test the values from tests-phandle.dtsi */ + switch (i) { + case 0: + passed &= !rc; + passed &= (args.args_count == 1); + passed &= (args.args[0] == 1); + break; + case 1: + passed &= !rc; + passed &= (args.args_count == 3); + passed &= (args.args[0] == 2); + passed &= (args.args[1] == 3); + passed &= (args.args[2] == 4); + break; + case 2: + passed &= !rc; + passed &= (args.args_count == 2); + passed &= (args.args[0] == 5); + passed &= (args.args[1] == 6); + break; + case 3: + passed &= !rc; + passed &= (args.args_count == 1); + passed &= (args.args[0] == 9); + break; + case 4: + passed &= !rc; + passed &= (args.args_count == 3); + passed &= (args.args[0] == 10); + passed &= (args.args[1] == 11); + passed &= (args.args[2] == 12); + break; + case 5: + passed &= !rc; + passed &= (args.args_count == 2); + passed &= (args.args[0] == 13); + passed &= (args.args[1] == 14); + break; + case 6: + passed &= !rc; + passed &= (args.args_count == 1); + passed &= (args.args[0] == 15); + break; + default: + passed = false; + } + + selftest(passed, "index %i - data error on node %s rc=%i\n", + i, args.np->full_name, rc); + } + of_node_put(np); +} + +static 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_selftest_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) { + selftest(0, "missing testcase node %s\n", + match_node_tests[i].path); + continue; + } + + match = of_match_node(match_node_table, np); + if (!match) { + selftest(0, "%s didn't match anything\n", + match_node_tests[i].path); + continue; + } + + if (strcmp(match->data, match_node_tests[i].data) != 0) { + selftest(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; + } + selftest(1, "passed"); + } +} + +struct device test_bus = { + .init_name = "unittest-bus", +}; +static void __init of_selftest_platform_populate(void) +{ + int irq, rc; + struct device_node *np, *child, *grandchild; + struct platform_device *pdev; + 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); + selftest(pdev, "device 1 creation failed\n"); + + irq = platform_get_irq(pdev, 0); + selftest(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); + selftest(pdev, "device 2 creation failed\n"); + irq = platform_get_irq(pdev, 0); + selftest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq); + + if (selftest(np = of_find_node_by_path("/testcase-data/platform-tests"), + "No testcase data in device tree\n")); + return; + + if (selftest(!(rc = device_register(&test_bus)), + "testbus registration failed; rc=%i\n", rc)); + return; + + for_each_child_of_node(np, child) { + of_platform_populate(child, match, NULL, &test_bus); + for_each_child_of_node(child, grandchild) + selftest(of_find_device_by_node(grandchild), + "Could not create device for node '%s'\n", + grandchild->name); + } + + of_platform_depopulate(&test_bus); + for_each_child_of_node(np, child) { + for_each_child_of_node(child, grandchild) + selftest(!of_find_device_by_node(grandchild), + "device didn't get destroyed '%s'\n", + grandchild->name); + } + + 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; +} + +/** + * selftest_data_add - Reads, copies data from + * linked tree and attaches it to the live tree + */ +static int __init selftest_data_add(void) +{ + void *selftest_data; + struct device_node *selftest_data_node, *np; + 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 */ + selftest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL); + + if (!selftest_data) { + pr_warn("%s: Failed to allocate memory for selftest_data; " + "not running tests\n", __func__); + return -ENOMEM; + } + of_fdt_unflatten_tree(selftest_data, &selftest_data_node); + if (!selftest_data_node) { + pr_warn("%s: No tree to attach; not running tests\n", __func__); + return -ENODATA; + } + of_node_set_flag(selftest_data_node, OF_DETACHED); + rc = of_resolve_phandles(selftest_data_node); + if (rc) { + pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc); + return -EINVAL; + } + + if (!of_root) { + of_root = selftest_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 = selftest_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 selftest_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 selftest_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 struct of_device_id selftest_match[] = { + { .compatible = "selftest", }, + {}, +}; + +static struct platform_driver selftest_driver = { + .probe = selftest_probe, + .remove = selftest_remove, + .driver = { + .name = "selftest", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(selftest_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_ENABLED(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 *selftest_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-selftest%d", base, nr); + buf[sizeof(buf) - 1] = '\0'; + return buf; +} + +static int of_selftest_device_exists(int selftest_nr, enum overlay_type ovtype) +{ + const char *path; + + path = selftest_path(selftest_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"; + +static int of_selftest_apply_overlay(int selftest_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) { + selftest(0, "could not find overlay node @\"%s\"\n", + overlay_path(overlay_nr)); + ret = -EINVAL; + goto out; + } + + ret = of_overlay_create(np); + if (ret < 0) { + selftest(0, "could not create overlay from \"%s\"\n", + overlay_path(overlay_nr)); + goto out; + } + id = ret; + + 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_selftest_apply_overlay_check(int overlay_nr, int selftest_nr, + int before, int after, enum overlay_type ovtype) +{ + int ret; + + /* selftest device must not be in before state */ + if (of_selftest_device_exists(selftest_nr, ovtype) != before) { + selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n", + overlay_path(overlay_nr), + selftest_path(selftest_nr, ovtype), + !before ? "enabled" : "disabled"); + return -EINVAL; + } + + ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, NULL); + if (ret != 0) { + /* of_selftest_apply_overlay already called selftest() */ + return ret; + } + + /* selftest device must be to set to after state */ + if (of_selftest_device_exists(selftest_nr, ovtype) != after) { + selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n", + overlay_path(overlay_nr), + selftest_path(selftest_nr, ovtype), + !after ? "enabled" : "disabled"); + return -EINVAL; + } + + return 0; +} + +/* apply an overlay and then revert it while checking before, after states */ +static int of_selftest_apply_revert_overlay_check(int overlay_nr, + int selftest_nr, int before, int after, + enum overlay_type ovtype) +{ + int ret, ov_id; + + /* selftest device must be in before state */ + if (of_selftest_device_exists(selftest_nr, ovtype) != before) { + selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n", + overlay_path(overlay_nr), + selftest_path(selftest_nr, ovtype), + !before ? "enabled" : "disabled"); + return -EINVAL; + } + + /* apply the overlay */ + ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, &ov_id); + if (ret != 0) { + /* of_selftest_apply_overlay already called selftest() */ + return ret; + } + + /* selftest device must be in after state */ + if (of_selftest_device_exists(selftest_nr, ovtype) != after) { + selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n", + overlay_path(overlay_nr), + selftest_path(selftest_nr, ovtype), + !after ? "enabled" : "disabled"); + return -EINVAL; + } + + ret = of_overlay_destroy(ov_id); + if (ret != 0) { + selftest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n", + overlay_path(overlay_nr), + selftest_path(selftest_nr, ovtype)); + return ret; + } + + /* selftest device must be again in before state */ + if (of_selftest_device_exists(selftest_nr, PDEV_OVERLAY) != before) { + selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n", + overlay_path(overlay_nr), + selftest_path(selftest_nr, ovtype), + !before ? "enabled" : "disabled"); + return -EINVAL; + } + + return 0; +} + +/* test activation of device */ +static void of_selftest_overlay_0(void) +{ + int ret; + + /* device should enable */ + ret = of_selftest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY); + if (ret != 0) + return; + + selftest(1, "overlay test %d passed\n", 0); +} + +/* test deactivation of device */ +static void of_selftest_overlay_1(void) +{ + int ret; + + /* device should disable */ + ret = of_selftest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY); + if (ret != 0) + return; + + selftest(1, "overlay test %d passed\n", 1); +} + +/* test activation of device */ +static void of_selftest_overlay_2(void) +{ + int ret; + + /* device should enable */ + ret = of_selftest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY); + if (ret != 0) + return; + + selftest(1, "overlay test %d passed\n", 2); +} + +/* test deactivation of device */ +static void of_selftest_overlay_3(void) +{ + int ret; + + /* device should disable */ + ret = of_selftest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY); + if (ret != 0) + return; + + selftest(1, "overlay test %d passed\n", 3); +} + +/* test activation of a full device node */ +static void of_selftest_overlay_4(void) +{ + int ret; + + /* device should disable */ + ret = of_selftest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY); + if (ret != 0) + return; + + selftest(1, "overlay test %d passed\n", 4); +} + +/* test overlay apply/revert sequence */ +static void of_selftest_overlay_5(void) +{ + int ret; + + /* device should disable */ + ret = of_selftest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY); + if (ret != 0) + return; + + selftest(1, "overlay test %d passed\n", 5); +} + +/* test overlay application in sequence */ +static void of_selftest_overlay_6(void) +{ + struct device_node *np; + int ret, i, ov_id[2]; + int overlay_nr = 6, selftest_nr = 6; + int before = 0, after = 1; + + /* selftest device must be in before state */ + for (i = 0; i < 2; i++) { + if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY) + != before) { + selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n", + overlay_path(overlay_nr + i), + selftest_path(selftest_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) { + selftest(0, "could not find overlay node @\"%s\"\n", + overlay_path(overlay_nr + i)); + return; + } + + ret = of_overlay_create(np); + if (ret < 0) { + selftest(0, "could not create overlay from \"%s\"\n", + overlay_path(overlay_nr + i)); + return; + } + ov_id[i] = ret; + } + + for (i = 0; i < 2; i++) { + /* selftest device must be in after state */ + if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY) + != after) { + selftest(0, "overlay @\"%s\" failed @\"%s\" %s\n", + overlay_path(overlay_nr + i), + selftest_path(selftest_nr + i, + PDEV_OVERLAY), + !after ? "enabled" : "disabled"); + return; + } + } + + for (i = 1; i >= 0; i--) { + ret = of_overlay_destroy(ov_id[i]); + if (ret != 0) { + selftest(0, "overlay @\"%s\" failed destroy @\"%s\"\n", + overlay_path(overlay_nr + i), + selftest_path(selftest_nr + i, + PDEV_OVERLAY)); + return; + } + } + + for (i = 0; i < 2; i++) { + /* selftest device must be again in before state */ + if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY) + != before) { + selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n", + overlay_path(overlay_nr + i), + selftest_path(selftest_nr + i, + PDEV_OVERLAY), + !before ? "enabled" : "disabled"); + return; + } + } + + selftest(1, "overlay test %d passed\n", 6); +} + +/* test overlay application in sequence */ +static void of_selftest_overlay_8(void) +{ + struct device_node *np; + int ret, i, ov_id[2]; + int overlay_nr = 8, selftest_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) { + selftest(0, "could not find overlay node @\"%s\"\n", + overlay_path(overlay_nr + i)); + return; + } + + ret = of_overlay_create(np); + if (ret < 0) { + selftest(0, "could not create overlay from \"%s\"\n", + overlay_path(overlay_nr + i)); + return; + } + ov_id[i] = ret; + } + + /* now try to remove first overlay (it should fail) */ + ret = of_overlay_destroy(ov_id[0]); + if (ret == 0) { + selftest(0, "overlay @\"%s\" was destroyed @\"%s\"\n", + overlay_path(overlay_nr + 0), + selftest_path(selftest_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) { + selftest(0, "overlay @\"%s\" not destroyed @\"%s\"\n", + overlay_path(overlay_nr + i), + selftest_path(selftest_nr, + PDEV_OVERLAY)); + return; + } + } + + selftest(1, "overlay test %d passed\n", 8); +} + +/* test insertion of a bus with parent devices */ +static void of_selftest_overlay_10(void) +{ + int ret; + char *child_path; + + /* device should disable */ + ret = of_selftest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY); + if (selftest(ret == 0, + "overlay test %d failed; overlay application\n", 10)) + return; + + child_path = kasprintf(GFP_KERNEL, "%s/test-selftest101", + selftest_path(10, PDEV_OVERLAY)); + if (selftest(child_path, "overlay test %d failed; kasprintf\n", 10)) + return; + + ret = of_path_device_type_exists(child_path, PDEV_OVERLAY); + kfree(child_path); + if (selftest(ret, "overlay test %d failed; no child device\n", 10)) + return; +} + +/* test insertion of a bus with parent devices (and revert) */ +static void of_selftest_overlay_11(void) +{ + int ret; + + /* device should disable */ + ret = of_selftest_apply_revert_overlay_check(11, 11, 0, 1, + PDEV_OVERLAY); + if (selftest(ret == 0, + "overlay test %d failed; overlay application\n", 11)) + return; +} + +#if IS_ENABLED(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY) + +struct selftest_i2c_bus_data { + struct platform_device *pdev; + struct i2c_adapter adap; +}; + +static int selftest_i2c_master_xfer(struct i2c_adapter *adap, + struct i2c_msg *msgs, int num) +{ + struct selftest_i2c_bus_data *std = i2c_get_adapdata(adap); + + (void)std; + + return num; +} + +static u32 selftest_i2c_functionality(struct i2c_adapter *adap) +{ + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; +} + +static const struct i2c_algorithm selftest_i2c_algo = { + .master_xfer = selftest_i2c_master_xfer, + .functionality = selftest_i2c_functionality, +}; + +static int selftest_i2c_bus_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct selftest_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 selftest 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 = &selftest_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 selftest_i2c_bus_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct selftest_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 struct of_device_id selftest_i2c_bus_match[] = { + { .compatible = "selftest-i2c-bus", }, + {}, +}; + +static struct platform_driver selftest_i2c_bus_driver = { + .probe = selftest_i2c_bus_probe, + .remove = selftest_i2c_bus_remove, + .driver = { + .name = "selftest-i2c-bus", + .of_match_table = of_match_ptr(selftest_i2c_bus_match), + }, +}; + +static int selftest_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 selftest_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 selftest_i2c_dev_id[] = { + { .name = "selftest-i2c-dev" }, + { } +}; + +static struct i2c_driver selftest_i2c_dev_driver = { + .driver = { + .name = "selftest-i2c-dev", + .owner = THIS_MODULE, + }, + .probe = selftest_i2c_dev_probe, + .remove = selftest_i2c_dev_remove, + .id_table = selftest_i2c_dev_id, +}; + +#if IS_ENABLED(CONFIG_I2C_MUX) + +struct selftest_i2c_mux_data { + int nchans; + struct i2c_adapter *adap[]; +}; + +static int selftest_i2c_mux_select_chan(struct i2c_adapter *adap, + void *client, u32 chan) +{ + return 0; +} + +static int selftest_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 selftest_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 selftest_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, selftest_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 selftest_i2c_mux_remove(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct device_node *np = client->dev.of_node; + struct selftest_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 selftest_i2c_mux_id[] = { + { .name = "selftest-i2c-mux" }, + { } +}; + +static struct i2c_driver selftest_i2c_mux_driver = { + .driver = { + .name = "selftest-i2c-mux", + .owner = THIS_MODULE, + }, + .probe = selftest_i2c_mux_probe, + .remove = selftest_i2c_mux_remove, + .id_table = selftest_i2c_mux_id, +}; + +#endif + +static int of_selftest_overlay_i2c_init(void) +{ + int ret; + + ret = i2c_add_driver(&selftest_i2c_dev_driver); + if (selftest(ret == 0, + "could not register selftest i2c device driver\n")) + return ret; + + ret = platform_driver_register(&selftest_i2c_bus_driver); + if (selftest(ret == 0, + "could not register selftest i2c bus driver\n")) + return ret; + +#if IS_ENABLED(CONFIG_I2C_MUX) + ret = i2c_add_driver(&selftest_i2c_mux_driver); + if (selftest(ret == 0, + "could not register selftest i2c mux driver\n")) + return ret; +#endif + + return 0; +} + +static void of_selftest_overlay_i2c_cleanup(void) +{ +#if IS_ENABLED(CONFIG_I2C_MUX) + i2c_del_driver(&selftest_i2c_mux_driver); +#endif + platform_driver_unregister(&selftest_i2c_bus_driver); + i2c_del_driver(&selftest_i2c_dev_driver); +} + +static void of_selftest_overlay_i2c_12(void) +{ + int ret; + + /* device should enable */ + ret = of_selftest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY); + if (ret != 0) + return; + + selftest(1, "overlay test %d passed\n", 12); +} + +/* test deactivation of device */ +static void of_selftest_overlay_i2c_13(void) +{ + int ret; + + /* device should disable */ + ret = of_selftest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY); + if (ret != 0) + return; + + selftest(1, "overlay test %d passed\n", 13); +} + +/* just check for i2c mux existence */ +static void of_selftest_overlay_i2c_14(void) +{ +} + +static void of_selftest_overlay_i2c_15(void) +{ + int ret; + + /* device should enable */ + ret = of_selftest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY); + if (ret != 0) + return; + + selftest(1, "overlay test %d passed\n", 15); +} + +#else + +static inline void of_selftest_overlay_i2c_14(void) { } +static inline void of_selftest_overlay_i2c_15(void) { } + +#endif + +static void __init of_selftest_overlay(void) +{ + struct device_node *bus_np = NULL; + int ret; + + ret = platform_driver_register(&selftest_driver); + if (ret != 0) { + selftest(0, "could not register selftest driver\n"); + goto out; + } + + bus_np = of_find_node_by_path(bus_path); + if (bus_np == NULL) { + selftest(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) { + selftest(0, "could not populate bus @ \"%s\"\n", bus_path); + goto out; + } + + if (!of_selftest_device_exists(100, PDEV_OVERLAY)) { + selftest(0, "could not find selftest0 @ \"%s\"\n", + selftest_path(100, PDEV_OVERLAY)); + goto out; + } + + if (of_selftest_device_exists(101, PDEV_OVERLAY)) { + selftest(0, "selftest1 @ \"%s\" should not exist\n", + selftest_path(101, PDEV_OVERLAY)); + goto out; + } + + selftest(1, "basic infrastructure of overlays passed"); + + /* tests in sequence */ + of_selftest_overlay_0(); + of_selftest_overlay_1(); + of_selftest_overlay_2(); + of_selftest_overlay_3(); + of_selftest_overlay_4(); + of_selftest_overlay_5(); + of_selftest_overlay_6(); + of_selftest_overlay_8(); + + of_selftest_overlay_10(); + of_selftest_overlay_11(); + +#if IS_ENABLED(CONFIG_I2C) + if (selftest(of_selftest_overlay_i2c_init() == 0, "i2c init failed\n")) + goto out; + + of_selftest_overlay_i2c_12(); + of_selftest_overlay_i2c_13(); + of_selftest_overlay_i2c_14(); + of_selftest_overlay_i2c_15(); + + of_selftest_overlay_i2c_cleanup(); +#endif + +out: + of_node_put(bus_np); +} + +#else +static inline void __init of_selftest_overlay(void) { } +#endif + +static int __init of_selftest(void) +{ + struct device_node *np; + int res; + + /* adding data for selftest */ + res = selftest_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 selftest - you will see error messages\n"); + of_selftest_check_tree_linkage(); + of_selftest_check_phandles(); + of_selftest_find_node_by_name(); + of_selftest_dynamic(); + of_selftest_parse_phandle_with_args(); + of_selftest_property_string(); + of_selftest_property_copy(); + of_selftest_changeset(); + of_selftest_parse_interrupts(); + of_selftest_parse_interrupts_extended(); + of_selftest_match_node(); + of_selftest_platform_populate(); + of_selftest_overlay(); + + /* Double check linkage after removing testcase data */ + of_selftest_check_tree_linkage(); + + pr_info("end of selftest - %i passed, %i failed\n", + selftest_results.passed, selftest_results.failed); + + return 0; +} +late_initcall(of_selftest); Index: b/drivers/of/unittest.c =================================================================== --- a/drivers/of/unittest.c +++ /dev/null @@ -1,1879 +0,0 @@ -/* - * 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/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 "of_private.h" - -static struct selftest_results { - int passed; - int failed; -} selftest_results; - -#define selftest(result, fmt, ...) ({ \ - bool failed = !(result); \ - if (failed) { \ - selftest_results.failed++; \ - pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \ - } else { \ - selftest_results.passed++; \ - pr_debug("pass %s():%i\n", __func__, __LINE__); \ - } \ - failed; \ -}) - -static void __init of_selftest_find_node_by_name(void) -{ - struct device_node *np; - const char *options; - - np = of_find_node_by_path("/testcase-data"); - selftest(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/"); - selftest(!np, "trailing '/' on /testcase-data/ should fail\n"); - - np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); - selftest(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"); - selftest(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/"); - selftest(!np, "trailing '/' on testcase-alias/ should fail\n"); - - np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a"); - selftest(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"); - selftest(!np, "non-existent path returned node %s\n", np->full_name); - of_node_put(np); - - np = of_find_node_by_path("missing-alias"); - selftest(!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"); - selftest(!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); - selftest(np && !strcmp("testoption", options), - "option path test failed\n"); - of_node_put(np); - - np = of_find_node_opts_by_path("/testcase-data:testoption", NULL); - selftest(np, "NULL option path test failed\n"); - of_node_put(np); - - np = of_find_node_opts_by_path("testcase-alias:testaliasoption", - &options); - selftest(np && !strcmp("testaliasoption", options), - "option alias path test failed\n"); - of_node_put(np); - - np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL); - selftest(np, "NULL option alias path test failed\n"); - of_node_put(np); - - options = "testoption"; - np = of_find_node_opts_by_path("testcase-alias", &options); - selftest(np && !options, "option clearing test failed\n"); - of_node_put(np); - - options = "testoption"; - np = of_find_node_opts_by_path("/", &options); - selftest(np && !options, "option clearing root node test failed\n"); - of_node_put(np); -} - -static void __init of_selftest_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) { - selftest(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); - selftest(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); - selftest(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); - selftest(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); - selftest(of_update_property(np, prop) == 0, - "Updating a missing property should have passed\n"); - - /* Remove property - should pass */ - selftest(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); - selftest(prop->value != NULL, "Unable to allocate large buffer\n"); - if (prop->value) - selftest(of_add_property(np, prop) == 0, - "Adding a large property should have passed\n"); -} - -static int __init of_selftest_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_selftest_check_node_linkage(child); - if (rc < 0) - return rc; - count += rc; - } - - return count + 1; -} - -static void __init of_selftest_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_selftest_check_node_linkage(of_root); - - selftest(child_count > 0, "Device node data structure is corrupted\n"); - selftest(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_selftest_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++; - } - selftest(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_selftest_parse_phandle_with_args(void) -{ - struct device_node *np; - struct of_phandle_args args; - int i, rc; - - np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); - if (!np) { - pr_err("missing testcase data\n"); - return; - } - - rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells"); - selftest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc); - - for (i = 0; i < 8; i++) { - bool passed = true; - rc = of_parse_phandle_with_args(np, "phandle-list", - "#phandle-cells", i, &args); - - /* Test the values from tests-phandle.dtsi */ - switch (i) { - case 0: - passed &= !rc; - passed &= (args.args_count == 1); - passed &= (args.args[0] == (i + 1)); - break; - case 1: - passed &= !rc; - passed &= (args.args_count == 2); - passed &= (args.args[0] == (i + 1)); - passed &= (args.args[1] == 0); - break; - case 2: - passed &= (rc == -ENOENT); - break; - case 3: - passed &= !rc; - passed &= (args.args_count == 3); - passed &= (args.args[0] == (i + 1)); - passed &= (args.args[1] == 4); - passed &= (args.args[2] == 3); - break; - case 4: - passed &= !rc; - passed &= (args.args_count == 2); - passed &= (args.args[0] == (i + 1)); - passed &= (args.args[1] == 100); - break; - case 5: - passed &= !rc; - passed &= (args.args_count == 0); - break; - case 6: - passed &= !rc; - passed &= (args.args_count == 1); - passed &= (args.args[0] == (i + 1)); - break; - case 7: - passed &= (rc == -ENOENT); - break; - default: - passed = false; - } - - selftest(passed, "index %i - data error on node %s rc=%i\n", - i, args.np->full_name, rc); - } - - /* Check for missing list property */ - rc = of_parse_phandle_with_args(np, "phandle-list-missing", - "#phandle-cells", 0, &args); - selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); - rc = of_count_phandle_with_args(np, "phandle-list-missing", - "#phandle-cells"); - selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); - - /* Check for missing cells property */ - rc = of_parse_phandle_with_args(np, "phandle-list", - "#phandle-cells-missing", 0, &args); - selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); - rc = of_count_phandle_with_args(np, "phandle-list", - "#phandle-cells-missing"); - selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); - - /* Check for bad phandle in list */ - rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle", - "#phandle-cells", 0, &args); - selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); - rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle", - "#phandle-cells"); - selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); - - /* Check for incorrectly formed argument list */ - rc = of_parse_phandle_with_args(np, "phandle-list-bad-args", - "#phandle-cells", 1, &args); - selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); - rc = of_count_phandle_with_args(np, "phandle-list-bad-args", - "#phandle-cells"); - selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); -} - -static void __init of_selftest_property_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"); - selftest(rc == 0, "first expected:0 got:%i\n", rc); - rc = of_property_match_string(np, "phandle-list-names", "second"); - selftest(rc == 1, "second expected:0 got:%i\n", rc); - rc = of_property_match_string(np, "phandle-list-names", "third"); - selftest(rc == 2, "third expected:0 got:%i\n", rc); - rc = of_property_match_string(np, "phandle-list-names", "fourth"); - selftest(rc == -ENODATA, "unmatched string; rc=%i\n", rc); - rc = of_property_match_string(np, "missing-property", "blah"); - selftest(rc == -EINVAL, "missing property; rc=%i\n", rc); - rc = of_property_match_string(np, "empty-property", "blah"); - selftest(rc == -ENODATA, "empty property; rc=%i\n", rc); - rc = of_property_match_string(np, "unterminated-string", "blah"); - selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); - - /* of_property_count_strings() tests */ - rc = of_property_count_strings(np, "string-property"); - selftest(rc == 1, "Incorrect string count; rc=%i\n", rc); - rc = of_property_count_strings(np, "phandle-list-names"); - selftest(rc == 3, "Incorrect string count; rc=%i\n", rc); - rc = of_property_count_strings(np, "unterminated-string"); - selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); - rc = of_property_count_strings(np, "unterminated-string-list"); - selftest(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); - selftest(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); - selftest(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); - selftest(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); - selftest(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); - selftest(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); - selftest(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); - selftest(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); - selftest(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 */ - selftest(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); - selftest(rc == 1, "Incorrect string count; rc=%i\n", rc); - rc = of_property_read_string_array(np, "phandle-list-names", strings, 4); - selftest(rc == 3, "Incorrect string count; rc=%i\n", rc); - rc = of_property_read_string_array(np, "unterminated-string", strings, 4); - selftest(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); - selftest(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); - selftest(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); - selftest(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_selftest_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); - selftest(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); - selftest(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_selftest_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; - - of_changeset_init(&chgset); - n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1"); - selftest(n1, "testcase setup failure\n"); - n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2"); - selftest(n2, "testcase setup failure\n"); - n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21"); - selftest(n21, "testcase setup failure %p\n", n21); - nremove = of_find_node_by_path("/testcase-data/changeset/node-remove"); - selftest(nremove, "testcase setup failure\n"); - ppadd = __of_prop_dup(&padd, GFP_KERNEL); - selftest(ppadd, "testcase setup failure\n"); - ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL); - selftest(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); - selftest(ppremove, "failed to find removal prop"); - - of_changeset_init(&chgset); - selftest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n"); - selftest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n"); - selftest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n"); - selftest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n"); - selftest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n"); - selftest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n"); - selftest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n"); - mutex_lock(&of_mutex); - selftest(!of_changeset_apply(&chgset), "apply failed\n"); - mutex_unlock(&of_mutex); - - /* Make sure node names are constructed correctly */ - selftest((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); - selftest(!of_changeset_revert(&chgset), "revert failed\n"); - mutex_unlock(&of_mutex); - - of_changeset_destroy(&chgset); -#endif -} - -static void __init of_selftest_parse_interrupts(void) -{ - struct device_node *np; - struct of_phandle_args args; - int i, rc; - - np = of_find_node_by_path("/testcase-data/interrupts/interrupts0"); - if (!np) { - pr_err("missing testcase data\n"); - return; - } - - for (i = 0; i < 4; i++) { - bool passed = true; - args.args_count = 0; - rc = of_irq_parse_one(np, i, &args); - - passed &= !rc; - passed &= (args.args_count == 1); - passed &= (args.args[0] == (i + 1)); - - selftest(passed, "index %i - data error on node %s rc=%i\n", - i, args.np->full_name, rc); - } - of_node_put(np); - - np = of_find_node_by_path("/testcase-data/interrupts/interrupts1"); - if (!np) { - pr_err("missing testcase data\n"); - return; - } - - for (i = 0; i < 4; i++) { - bool passed = true; - args.args_count = 0; - rc = of_irq_parse_one(np, i, &args); - - /* Test the values from tests-phandle.dtsi */ - switch (i) { - case 0: - passed &= !rc; - passed &= (args.args_count == 1); - passed &= (args.args[0] == 9); - break; - case 1: - passed &= !rc; - passed &= (args.args_count == 3); - passed &= (args.args[0] == 10); - passed &= (args.args[1] == 11); - passed &= (args.args[2] == 12); - break; - case 2: - passed &= !rc; - passed &= (args.args_count == 2); - passed &= (args.args[0] == 13); - passed &= (args.args[1] == 14); - break; - case 3: - passed &= !rc; - passed &= (args.args_count == 2); - passed &= (args.args[0] == 15); - passed &= (args.args[1] == 16); - break; - default: - passed = false; - } - selftest(passed, "index %i - data error on node %s rc=%i\n", - i, args.np->full_name, rc); - } - of_node_put(np); -} - -static void __init of_selftest_parse_interrupts_extended(void) -{ - struct device_node *np; - struct of_phandle_args args; - int i, rc; - - np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0"); - if (!np) { - pr_err("missing testcase data\n"); - return; - } - - for (i = 0; i < 7; i++) { - bool passed = true; - rc = of_irq_parse_one(np, i, &args); - - /* Test the values from tests-phandle.dtsi */ - switch (i) { - case 0: - passed &= !rc; - passed &= (args.args_count == 1); - passed &= (args.args[0] == 1); - break; - case 1: - passed &= !rc; - passed &= (args.args_count == 3); - passed &= (args.args[0] == 2); - passed &= (args.args[1] == 3); - passed &= (args.args[2] == 4); - break; - case 2: - passed &= !rc; - passed &= (args.args_count == 2); - passed &= (args.args[0] == 5); - passed &= (args.args[1] == 6); - break; - case 3: - passed &= !rc; - passed &= (args.args_count == 1); - passed &= (args.args[0] == 9); - break; - case 4: - passed &= !rc; - passed &= (args.args_count == 3); - passed &= (args.args[0] == 10); - passed &= (args.args[1] == 11); - passed &= (args.args[2] == 12); - break; - case 5: - passed &= !rc; - passed &= (args.args_count == 2); - passed &= (args.args[0] == 13); - passed &= (args.args[1] == 14); - break; - case 6: - passed &= !rc; - passed &= (args.args_count == 1); - passed &= (args.args[0] == 15); - break; - default: - passed = false; - } - - selftest(passed, "index %i - data error on node %s rc=%i\n", - i, args.np->full_name, rc); - } - of_node_put(np); -} - -static 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_selftest_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) { - selftest(0, "missing testcase node %s\n", - match_node_tests[i].path); - continue; - } - - match = of_match_node(match_node_table, np); - if (!match) { - selftest(0, "%s didn't match anything\n", - match_node_tests[i].path); - continue; - } - - if (strcmp(match->data, match_node_tests[i].data) != 0) { - selftest(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; - } - selftest(1, "passed"); - } -} - -struct device test_bus = { - .init_name = "unittest-bus", -}; -static void __init of_selftest_platform_populate(void) -{ - int irq, rc; - struct device_node *np, *child, *grandchild; - struct platform_device *pdev; - 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); - selftest(pdev, "device 1 creation failed\n"); - - irq = platform_get_irq(pdev, 0); - selftest(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); - selftest(pdev, "device 2 creation failed\n"); - irq = platform_get_irq(pdev, 0); - selftest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq); - - if (selftest(np = of_find_node_by_path("/testcase-data/platform-tests"), - "No testcase data in device tree\n")); - return; - - if (selftest(!(rc = device_register(&test_bus)), - "testbus registration failed; rc=%i\n", rc)); - return; - - for_each_child_of_node(np, child) { - of_platform_populate(child, match, NULL, &test_bus); - for_each_child_of_node(child, grandchild) - selftest(of_find_device_by_node(grandchild), - "Could not create device for node '%s'\n", - grandchild->name); - } - - of_platform_depopulate(&test_bus); - for_each_child_of_node(np, child) { - for_each_child_of_node(child, grandchild) - selftest(!of_find_device_by_node(grandchild), - "device didn't get destroyed '%s'\n", - grandchild->name); - } - - 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; -} - -/** - * selftest_data_add - Reads, copies data from - * linked tree and attaches it to the live tree - */ -static int __init selftest_data_add(void) -{ - void *selftest_data; - struct device_node *selftest_data_node, *np; - 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 */ - selftest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL); - - if (!selftest_data) { - pr_warn("%s: Failed to allocate memory for selftest_data; " - "not running tests\n", __func__); - return -ENOMEM; - } - of_fdt_unflatten_tree(selftest_data, &selftest_data_node); - if (!selftest_data_node) { - pr_warn("%s: No tree to attach; not running tests\n", __func__); - return -ENODATA; - } - of_node_set_flag(selftest_data_node, OF_DETACHED); - rc = of_resolve_phandles(selftest_data_node); - if (rc) { - pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc); - return -EINVAL; - } - - if (!of_root) { - of_root = selftest_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 = selftest_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 selftest_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 selftest_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 struct of_device_id selftest_match[] = { - { .compatible = "selftest", }, - {}, -}; - -static struct platform_driver selftest_driver = { - .probe = selftest_probe, - .remove = selftest_remove, - .driver = { - .name = "selftest", - .owner = THIS_MODULE, - .of_match_table = of_match_ptr(selftest_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_ENABLED(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 *selftest_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-selftest%d", base, nr); - buf[sizeof(buf) - 1] = '\0'; - return buf; -} - -static int of_selftest_device_exists(int selftest_nr, enum overlay_type ovtype) -{ - const char *path; - - path = selftest_path(selftest_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"; - -static int of_selftest_apply_overlay(int selftest_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) { - selftest(0, "could not find overlay node @\"%s\"\n", - overlay_path(overlay_nr)); - ret = -EINVAL; - goto out; - } - - ret = of_overlay_create(np); - if (ret < 0) { - selftest(0, "could not create overlay from \"%s\"\n", - overlay_path(overlay_nr)); - goto out; - } - id = ret; - - 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_selftest_apply_overlay_check(int overlay_nr, int selftest_nr, - int before, int after, enum overlay_type ovtype) -{ - int ret; - - /* selftest device must not be in before state */ - if (of_selftest_device_exists(selftest_nr, ovtype) != before) { - selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n", - overlay_path(overlay_nr), - selftest_path(selftest_nr, ovtype), - !before ? "enabled" : "disabled"); - return -EINVAL; - } - - ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, NULL); - if (ret != 0) { - /* of_selftest_apply_overlay already called selftest() */ - return ret; - } - - /* selftest device must be to set to after state */ - if (of_selftest_device_exists(selftest_nr, ovtype) != after) { - selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n", - overlay_path(overlay_nr), - selftest_path(selftest_nr, ovtype), - !after ? "enabled" : "disabled"); - return -EINVAL; - } - - return 0; -} - -/* apply an overlay and then revert it while checking before, after states */ -static int of_selftest_apply_revert_overlay_check(int overlay_nr, - int selftest_nr, int before, int after, - enum overlay_type ovtype) -{ - int ret, ov_id; - - /* selftest device must be in before state */ - if (of_selftest_device_exists(selftest_nr, ovtype) != before) { - selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n", - overlay_path(overlay_nr), - selftest_path(selftest_nr, ovtype), - !before ? "enabled" : "disabled"); - return -EINVAL; - } - - /* apply the overlay */ - ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, &ov_id); - if (ret != 0) { - /* of_selftest_apply_overlay already called selftest() */ - return ret; - } - - /* selftest device must be in after state */ - if (of_selftest_device_exists(selftest_nr, ovtype) != after) { - selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n", - overlay_path(overlay_nr), - selftest_path(selftest_nr, ovtype), - !after ? "enabled" : "disabled"); - return -EINVAL; - } - - ret = of_overlay_destroy(ov_id); - if (ret != 0) { - selftest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n", - overlay_path(overlay_nr), - selftest_path(selftest_nr, ovtype)); - return ret; - } - - /* selftest device must be again in before state */ - if (of_selftest_device_exists(selftest_nr, PDEV_OVERLAY) != before) { - selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n", - overlay_path(overlay_nr), - selftest_path(selftest_nr, ovtype), - !before ? "enabled" : "disabled"); - return -EINVAL; - } - - return 0; -} - -/* test activation of device */ -static void of_selftest_overlay_0(void) -{ - int ret; - - /* device should enable */ - ret = of_selftest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY); - if (ret != 0) - return; - - selftest(1, "overlay test %d passed\n", 0); -} - -/* test deactivation of device */ -static void of_selftest_overlay_1(void) -{ - int ret; - - /* device should disable */ - ret = of_selftest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY); - if (ret != 0) - return; - - selftest(1, "overlay test %d passed\n", 1); -} - -/* test activation of device */ -static void of_selftest_overlay_2(void) -{ - int ret; - - /* device should enable */ - ret = of_selftest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY); - if (ret != 0) - return; - - selftest(1, "overlay test %d passed\n", 2); -} - -/* test deactivation of device */ -static void of_selftest_overlay_3(void) -{ - int ret; - - /* device should disable */ - ret = of_selftest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY); - if (ret != 0) - return; - - selftest(1, "overlay test %d passed\n", 3); -} - -/* test activation of a full device node */ -static void of_selftest_overlay_4(void) -{ - int ret; - - /* device should disable */ - ret = of_selftest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY); - if (ret != 0) - return; - - selftest(1, "overlay test %d passed\n", 4); -} - -/* test overlay apply/revert sequence */ -static void of_selftest_overlay_5(void) -{ - int ret; - - /* device should disable */ - ret = of_selftest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY); - if (ret != 0) - return; - - selftest(1, "overlay test %d passed\n", 5); -} - -/* test overlay application in sequence */ -static void of_selftest_overlay_6(void) -{ - struct device_node *np; - int ret, i, ov_id[2]; - int overlay_nr = 6, selftest_nr = 6; - int before = 0, after = 1; - - /* selftest device must be in before state */ - for (i = 0; i < 2; i++) { - if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY) - != before) { - selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n", - overlay_path(overlay_nr + i), - selftest_path(selftest_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) { - selftest(0, "could not find overlay node @\"%s\"\n", - overlay_path(overlay_nr + i)); - return; - } - - ret = of_overlay_create(np); - if (ret < 0) { - selftest(0, "could not create overlay from \"%s\"\n", - overlay_path(overlay_nr + i)); - return; - } - ov_id[i] = ret; - } - - for (i = 0; i < 2; i++) { - /* selftest device must be in after state */ - if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY) - != after) { - selftest(0, "overlay @\"%s\" failed @\"%s\" %s\n", - overlay_path(overlay_nr + i), - selftest_path(selftest_nr + i, - PDEV_OVERLAY), - !after ? "enabled" : "disabled"); - return; - } - } - - for (i = 1; i >= 0; i--) { - ret = of_overlay_destroy(ov_id[i]); - if (ret != 0) { - selftest(0, "overlay @\"%s\" failed destroy @\"%s\"\n", - overlay_path(overlay_nr + i), - selftest_path(selftest_nr + i, - PDEV_OVERLAY)); - return; - } - } - - for (i = 0; i < 2; i++) { - /* selftest device must be again in before state */ - if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY) - != before) { - selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n", - overlay_path(overlay_nr + i), - selftest_path(selftest_nr + i, - PDEV_OVERLAY), - !before ? "enabled" : "disabled"); - return; - } - } - - selftest(1, "overlay test %d passed\n", 6); -} - -/* test overlay application in sequence */ -static void of_selftest_overlay_8(void) -{ - struct device_node *np; - int ret, i, ov_id[2]; - int overlay_nr = 8, selftest_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) { - selftest(0, "could not find overlay node @\"%s\"\n", - overlay_path(overlay_nr + i)); - return; - } - - ret = of_overlay_create(np); - if (ret < 0) { - selftest(0, "could not create overlay from \"%s\"\n", - overlay_path(overlay_nr + i)); - return; - } - ov_id[i] = ret; - } - - /* now try to remove first overlay (it should fail) */ - ret = of_overlay_destroy(ov_id[0]); - if (ret == 0) { - selftest(0, "overlay @\"%s\" was destroyed @\"%s\"\n", - overlay_path(overlay_nr + 0), - selftest_path(selftest_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) { - selftest(0, "overlay @\"%s\" not destroyed @\"%s\"\n", - overlay_path(overlay_nr + i), - selftest_path(selftest_nr, - PDEV_OVERLAY)); - return; - } - } - - selftest(1, "overlay test %d passed\n", 8); -} - -/* test insertion of a bus with parent devices */ -static void of_selftest_overlay_10(void) -{ - int ret; - char *child_path; - - /* device should disable */ - ret = of_selftest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY); - if (selftest(ret == 0, - "overlay test %d failed; overlay application\n", 10)) - return; - - child_path = kasprintf(GFP_KERNEL, "%s/test-selftest101", - selftest_path(10, PDEV_OVERLAY)); - if (selftest(child_path, "overlay test %d failed; kasprintf\n", 10)) - return; - - ret = of_path_device_type_exists(child_path, PDEV_OVERLAY); - kfree(child_path); - if (selftest(ret, "overlay test %d failed; no child device\n", 10)) - return; -} - -/* test insertion of a bus with parent devices (and revert) */ -static void of_selftest_overlay_11(void) -{ - int ret; - - /* device should disable */ - ret = of_selftest_apply_revert_overlay_check(11, 11, 0, 1, - PDEV_OVERLAY); - if (selftest(ret == 0, - "overlay test %d failed; overlay application\n", 11)) - return; -} - -#if IS_ENABLED(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY) - -struct selftest_i2c_bus_data { - struct platform_device *pdev; - struct i2c_adapter adap; -}; - -static int selftest_i2c_master_xfer(struct i2c_adapter *adap, - struct i2c_msg *msgs, int num) -{ - struct selftest_i2c_bus_data *std = i2c_get_adapdata(adap); - - (void)std; - - return num; -} - -static u32 selftest_i2c_functionality(struct i2c_adapter *adap) -{ - return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; -} - -static const struct i2c_algorithm selftest_i2c_algo = { - .master_xfer = selftest_i2c_master_xfer, - .functionality = selftest_i2c_functionality, -}; - -static int selftest_i2c_bus_probe(struct platform_device *pdev) -{ - struct device *dev = &pdev->dev; - struct device_node *np = dev->of_node; - struct selftest_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 selftest 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 = &selftest_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 selftest_i2c_bus_remove(struct platform_device *pdev) -{ - struct device *dev = &pdev->dev; - struct device_node *np = dev->of_node; - struct selftest_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 struct of_device_id selftest_i2c_bus_match[] = { - { .compatible = "selftest-i2c-bus", }, - {}, -}; - -static struct platform_driver selftest_i2c_bus_driver = { - .probe = selftest_i2c_bus_probe, - .remove = selftest_i2c_bus_remove, - .driver = { - .name = "selftest-i2c-bus", - .of_match_table = of_match_ptr(selftest_i2c_bus_match), - }, -}; - -static int selftest_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 selftest_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 selftest_i2c_dev_id[] = { - { .name = "selftest-i2c-dev" }, - { } -}; - -static struct i2c_driver selftest_i2c_dev_driver = { - .driver = { - .name = "selftest-i2c-dev", - .owner = THIS_MODULE, - }, - .probe = selftest_i2c_dev_probe, - .remove = selftest_i2c_dev_remove, - .id_table = selftest_i2c_dev_id, -}; - -#if IS_ENABLED(CONFIG_I2C_MUX) - -struct selftest_i2c_mux_data { - int nchans; - struct i2c_adapter *adap[]; -}; - -static int selftest_i2c_mux_select_chan(struct i2c_adapter *adap, - void *client, u32 chan) -{ - return 0; -} - -static int selftest_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 selftest_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 selftest_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, selftest_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 selftest_i2c_mux_remove(struct i2c_client *client) -{ - struct device *dev = &client->dev; - struct device_node *np = client->dev.of_node; - struct selftest_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 selftest_i2c_mux_id[] = { - { .name = "selftest-i2c-mux" }, - { } -}; - -static struct i2c_driver selftest_i2c_mux_driver = { - .driver = { - .name = "selftest-i2c-mux", - .owner = THIS_MODULE, - }, - .probe = selftest_i2c_mux_probe, - .remove = selftest_i2c_mux_remove, - .id_table = selftest_i2c_mux_id, -}; - -#endif - -static int of_selftest_overlay_i2c_init(void) -{ - int ret; - - ret = i2c_add_driver(&selftest_i2c_dev_driver); - if (selftest(ret == 0, - "could not register selftest i2c device driver\n")) - return ret; - - ret = platform_driver_register(&selftest_i2c_bus_driver); - if (selftest(ret == 0, - "could not register selftest i2c bus driver\n")) - return ret; - -#if IS_ENABLED(CONFIG_I2C_MUX) - ret = i2c_add_driver(&selftest_i2c_mux_driver); - if (selftest(ret == 0, - "could not register selftest i2c mux driver\n")) - return ret; -#endif - - return 0; -} - -static void of_selftest_overlay_i2c_cleanup(void) -{ -#if IS_ENABLED(CONFIG_I2C_MUX) - i2c_del_driver(&selftest_i2c_mux_driver); -#endif - platform_driver_unregister(&selftest_i2c_bus_driver); - i2c_del_driver(&selftest_i2c_dev_driver); -} - -static void of_selftest_overlay_i2c_12(void) -{ - int ret; - - /* device should enable */ - ret = of_selftest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY); - if (ret != 0) - return; - - selftest(1, "overlay test %d passed\n", 12); -} - -/* test deactivation of device */ -static void of_selftest_overlay_i2c_13(void) -{ - int ret; - - /* device should disable */ - ret = of_selftest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY); - if (ret != 0) - return; - - selftest(1, "overlay test %d passed\n", 13); -} - -/* just check for i2c mux existence */ -static void of_selftest_overlay_i2c_14(void) -{ -} - -static void of_selftest_overlay_i2c_15(void) -{ - int ret; - - /* device should enable */ - ret = of_selftest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY); - if (ret != 0) - return; - - selftest(1, "overlay test %d passed\n", 15); -} - -#else - -static inline void of_selftest_overlay_i2c_14(void) { } -static inline void of_selftest_overlay_i2c_15(void) { } - -#endif - -static void __init of_selftest_overlay(void) -{ - struct device_node *bus_np = NULL; - int ret; - - ret = platform_driver_register(&selftest_driver); - if (ret != 0) { - selftest(0, "could not register selftest driver\n"); - goto out; - } - - bus_np = of_find_node_by_path(bus_path); - if (bus_np == NULL) { - selftest(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) { - selftest(0, "could not populate bus @ \"%s\"\n", bus_path); - goto out; - } - - if (!of_selftest_device_exists(100, PDEV_OVERLAY)) { - selftest(0, "could not find selftest0 @ \"%s\"\n", - selftest_path(100, PDEV_OVERLAY)); - goto out; - } - - if (of_selftest_device_exists(101, PDEV_OVERLAY)) { - selftest(0, "selftest1 @ \"%s\" should not exist\n", - selftest_path(101, PDEV_OVERLAY)); - goto out; - } - - selftest(1, "basic infrastructure of overlays passed"); - - /* tests in sequence */ - of_selftest_overlay_0(); - of_selftest_overlay_1(); - of_selftest_overlay_2(); - of_selftest_overlay_3(); - of_selftest_overlay_4(); - of_selftest_overlay_5(); - of_selftest_overlay_6(); - of_selftest_overlay_8(); - - of_selftest_overlay_10(); - of_selftest_overlay_11(); - -#if IS_ENABLED(CONFIG_I2C) - if (selftest(of_selftest_overlay_i2c_init() == 0, "i2c init failed\n")) - goto out; - - of_selftest_overlay_i2c_12(); - of_selftest_overlay_i2c_13(); - of_selftest_overlay_i2c_14(); - of_selftest_overlay_i2c_15(); - - of_selftest_overlay_i2c_cleanup(); -#endif - -out: - of_node_put(bus_np); -} - -#else -static inline void __init of_selftest_overlay(void) { } -#endif - -static int __init of_selftest(void) -{ - struct device_node *np; - int res; - - /* adding data for selftest */ - res = selftest_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 selftest - you will see error messages\n"); - of_selftest_check_tree_linkage(); - of_selftest_check_phandles(); - of_selftest_find_node_by_name(); - of_selftest_dynamic(); - of_selftest_parse_phandle_with_args(); - of_selftest_property_string(); - of_selftest_property_copy(); - of_selftest_changeset(); - of_selftest_parse_interrupts(); - of_selftest_parse_interrupts_extended(); - of_selftest_match_node(); - of_selftest_platform_populate(); - of_selftest_overlay(); - - /* Double check linkage after removing testcase data */ - of_selftest_check_tree_linkage(); - - pr_info("end of selftest - %i passed, %i failed\n", - selftest_results.passed, selftest_results.failed); - - return 0; -} -late_initcall(of_selftest); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
