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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/of/unittest.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/of/unittest.c')
-rw-r--r--drivers/of/unittest.c4065
1 files changed, 4065 insertions, 0 deletions
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
new file mode 100644
index 0000000000..f278def7ef
--- /dev/null
+++ b/drivers/of/unittest.c
@@ -0,0 +1,4065 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Self tests for device tree subsystem
+ */
+
+#define pr_fmt(fmt) "### dt-test ### " fmt
+
+#include <linux/memblock.h>
+#include <linux/clk.h>
+#include <linux/dma-direct.h> /* to test phys_to_dma/dma_to_phys */
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/hashtable.h>
+#include <linux/libfdt.h>
+#include <linux/of.h>
+#include <linux/of_address.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/pci.h>
+#include <linux/kernel.h>
+
+#include <linux/i2c.h>
+#include <linux/i2c-mux.h>
+#include <linux/gpio/driver.h>
+
+#include <linux/bitops.h>
+
+#include "of_private.h"
+
+static struct unittest_results {
+ int passed;
+ int failed;
+} unittest_results;
+
+#define unittest(result, fmt, ...) ({ \
+ bool failed = !(result); \
+ if (failed) { \
+ unittest_results.failed++; \
+ pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
+ } else { \
+ unittest_results.passed++; \
+ pr_info("pass %s():%i\n", __func__, __LINE__); \
+ } \
+ failed; \
+})
+
+/*
+ * Expected message may have a message level other than KERN_INFO.
+ * Print the expected message only if the current loglevel will allow
+ * the actual message to print.
+ *
+ * Do not use EXPECT_BEGIN(), EXPECT_END(), EXPECT_NOT_BEGIN(), or
+ * EXPECT_NOT_END() to report messages expected to be reported or not
+ * reported by pr_debug().
+ */
+#define EXPECT_BEGIN(level, fmt, ...) \
+ printk(level pr_fmt("EXPECT \\ : ") fmt, ##__VA_ARGS__)
+
+#define EXPECT_END(level, fmt, ...) \
+ printk(level pr_fmt("EXPECT / : ") fmt, ##__VA_ARGS__)
+
+#define EXPECT_NOT_BEGIN(level, fmt, ...) \
+ printk(level pr_fmt("EXPECT_NOT \\ : ") fmt, ##__VA_ARGS__)
+
+#define EXPECT_NOT_END(level, fmt, ...) \
+ printk(level pr_fmt("EXPECT_NOT / : ") fmt, ##__VA_ARGS__)
+
+static void __init of_unittest_find_node_by_name(void)
+{
+ struct device_node *np;
+ const char *options, *name;
+
+ np = of_find_node_by_path("/testcase-data");
+ name = kasprintf(GFP_KERNEL, "%pOF", np);
+ unittest(np && name && !strcmp("/testcase-data", name),
+ "find /testcase-data failed\n");
+ of_node_put(np);
+ kfree(name);
+
+ /* Test if trailing '/' works */
+ np = of_find_node_by_path("/testcase-data/");
+ unittest(!np, "trailing '/' on /testcase-data/ should fail\n");
+
+ np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
+ name = kasprintf(GFP_KERNEL, "%pOF", np);
+ unittest(np && name && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
+ "find /testcase-data/phandle-tests/consumer-a failed\n");
+ of_node_put(np);
+ kfree(name);
+
+ np = of_find_node_by_path("testcase-alias");
+ name = kasprintf(GFP_KERNEL, "%pOF", np);
+ unittest(np && name && !strcmp("/testcase-data", name),
+ "find testcase-alias failed\n");
+ of_node_put(np);
+ kfree(name);
+
+ /* Test if trailing '/' works on aliases */
+ np = of_find_node_by_path("testcase-alias/");
+ unittest(!np, "trailing '/' on testcase-alias/ should fail\n");
+
+ np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
+ name = kasprintf(GFP_KERNEL, "%pOF", np);
+ unittest(np && name && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
+ "find testcase-alias/phandle-tests/consumer-a failed\n");
+ of_node_put(np);
+ kfree(name);
+
+ np = of_find_node_by_path("/testcase-data/missing-path");
+ unittest(!np, "non-existent path returned node %pOF\n", np);
+ of_node_put(np);
+
+ np = of_find_node_by_path("missing-alias");
+ unittest(!np, "non-existent alias returned node %pOF\n", np);
+ of_node_put(np);
+
+ np = of_find_node_by_path("testcase-alias/missing-path");
+ unittest(!np, "non-existent alias with relative path returned node %pOF\n", np);
+ of_node_put(np);
+
+ np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
+ unittest(np && !strcmp("testoption", options),
+ "option path test failed\n");
+ of_node_put(np);
+
+ np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
+ unittest(np && !strcmp("test/option", options),
+ "option path test, subcase #1 failed\n");
+ of_node_put(np);
+
+ np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options);
+ unittest(np && !strcmp("test/option", options),
+ "option path test, subcase #2 failed\n");
+ of_node_put(np);
+
+ np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
+ unittest(np, "NULL option path test failed\n");
+ of_node_put(np);
+
+ np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
+ &options);
+ unittest(np && !strcmp("testaliasoption", options),
+ "option alias path test failed\n");
+ of_node_put(np);
+
+ np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
+ &options);
+ unittest(np && !strcmp("test/alias/option", options),
+ "option alias path test, subcase #1 failed\n");
+ of_node_put(np);
+
+ np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
+ unittest(np, "NULL option alias path test failed\n");
+ of_node_put(np);
+
+ options = "testoption";
+ np = of_find_node_opts_by_path("testcase-alias", &options);
+ unittest(np && !options, "option clearing test failed\n");
+ of_node_put(np);
+
+ options = "testoption";
+ np = of_find_node_opts_by_path("/", &options);
+ unittest(np && !options, "option clearing root node test failed\n");
+ of_node_put(np);
+}
+
+static void __init of_unittest_dynamic(void)
+{
+ struct device_node *np;
+ struct property *prop;
+
+ np = of_find_node_by_path("/testcase-data");
+ if (!np) {
+ pr_err("missing testcase data\n");
+ return;
+ }
+
+ /* Array of 4 properties for the purpose of testing */
+ prop = kcalloc(4, sizeof(*prop), GFP_KERNEL);
+ if (!prop) {
+ unittest(0, "kzalloc() failed\n");
+ return;
+ }
+
+ /* Add a new property - should pass*/
+ prop->name = "new-property";
+ prop->value = "new-property-data";
+ prop->length = strlen(prop->value) + 1;
+ unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
+
+ /* Try to add an existing property - should fail */
+ prop++;
+ prop->name = "new-property";
+ prop->value = "new-property-data-should-fail";
+ prop->length = strlen(prop->value) + 1;
+ unittest(of_add_property(np, prop) != 0,
+ "Adding an existing property should have failed\n");
+
+ /* Try to modify an existing property - should pass */
+ prop->value = "modify-property-data-should-pass";
+ prop->length = strlen(prop->value) + 1;
+ unittest(of_update_property(np, prop) == 0,
+ "Updating an existing property should have passed\n");
+
+ /* Try to modify non-existent property - should pass*/
+ prop++;
+ prop->name = "modify-property";
+ prop->value = "modify-missing-property-data-should-pass";
+ prop->length = strlen(prop->value) + 1;
+ unittest(of_update_property(np, prop) == 0,
+ "Updating a missing property should have passed\n");
+
+ /* Remove property - should pass */
+ unittest(of_remove_property(np, prop) == 0,
+ "Removing a property should have passed\n");
+
+ /* Adding very large property - should pass */
+ prop++;
+ prop->name = "large-property-PAGE_SIZEx8";
+ prop->length = PAGE_SIZE * 8;
+ prop->value = kzalloc(prop->length, GFP_KERNEL);
+ unittest(prop->value != NULL, "Unable to allocate large buffer\n");
+ if (prop->value)
+ unittest(of_add_property(np, prop) == 0,
+ "Adding a large property should have passed\n");
+}
+
+static int __init of_unittest_check_node_linkage(struct device_node *np)
+{
+ struct device_node *child;
+ int count = 0, rc;
+
+ for_each_child_of_node(np, child) {
+ if (child->parent != np) {
+ pr_err("Child node %pOFn links to wrong parent %pOFn\n",
+ child, np);
+ rc = -EINVAL;
+ goto put_child;
+ }
+
+ rc = of_unittest_check_node_linkage(child);
+ if (rc < 0)
+ goto put_child;
+ count += rc;
+ }
+
+ return count + 1;
+put_child:
+ of_node_put(child);
+ return rc;
+}
+
+static void __init of_unittest_check_tree_linkage(void)
+{
+ struct device_node *np;
+ int allnode_count = 0, child_count;
+
+ if (!of_root)
+ return;
+
+ for_each_of_allnodes(np)
+ allnode_count++;
+ child_count = of_unittest_check_node_linkage(of_root);
+
+ unittest(child_count > 0, "Device node data structure is corrupted\n");
+ unittest(child_count == allnode_count,
+ "allnodes list size (%i) doesn't match sibling lists size (%i)\n",
+ allnode_count, child_count);
+ pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
+}
+
+static void __init of_unittest_printf_one(struct device_node *np, const char *fmt,
+ const char *expected)
+{
+ unsigned char *buf;
+ int buf_size;
+ int size, i;
+
+ buf_size = strlen(expected) + 10;
+ buf = kmalloc(buf_size, GFP_KERNEL);
+ if (!buf)
+ return;
+
+ /* Baseline; check conversion with a large size limit */
+ memset(buf, 0xff, buf_size);
+ size = snprintf(buf, buf_size - 2, fmt, np);
+
+ /* use strcmp() instead of strncmp() here to be absolutely sure strings match */
+ unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff),
+ "sprintf failed; fmt='%s' expected='%s' rslt='%s'\n",
+ fmt, expected, buf);
+
+ /* Make sure length limits work */
+ size++;
+ for (i = 0; i < 2; i++, size--) {
+ /* Clear the buffer, and make sure it works correctly still */
+ memset(buf, 0xff, buf_size);
+ snprintf(buf, size+1, fmt, np);
+ unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 0xff),
+ "snprintf failed; size=%i fmt='%s' expected='%s' rslt='%s'\n",
+ size, fmt, expected, buf);
+ }
+ kfree(buf);
+}
+
+static void __init of_unittest_printf(void)
+{
+ struct device_node *np;
+ const char *full_name = "/testcase-data/platform-tests/test-device@1/dev@100";
+ char phandle_str[16] = "";
+
+ np = of_find_node_by_path(full_name);
+ if (!np) {
+ unittest(np, "testcase data missing\n");
+ return;
+ }
+
+ num_to_str(phandle_str, sizeof(phandle_str), np->phandle, 0);
+
+ of_unittest_printf_one(np, "%pOF", full_name);
+ of_unittest_printf_one(np, "%pOFf", full_name);
+ of_unittest_printf_one(np, "%pOFn", "dev");
+ of_unittest_printf_one(np, "%2pOFn", "dev");
+ of_unittest_printf_one(np, "%5pOFn", " dev");
+ of_unittest_printf_one(np, "%pOFnc", "dev:test-sub-device");
+ of_unittest_printf_one(np, "%pOFp", phandle_str);
+ of_unittest_printf_one(np, "%pOFP", "dev@100");
+ of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC");
+ of_unittest_printf_one(np, "%10pOFP", " dev@100");
+ of_unittest_printf_one(np, "%-10pOFP", "dev@100 ");
+ of_unittest_printf_one(of_root, "%pOFP", "/");
+ of_unittest_printf_one(np, "%pOFF", "----");
+ of_unittest_printf_one(np, "%pOFPF", "dev@100:----");
+ of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device");
+ of_unittest_printf_one(np, "%pOFc", "test-sub-device");
+ of_unittest_printf_one(np, "%pOFC",
+ "\"test-sub-device\",\"test-compat2\",\"test-compat3\"");
+}
+
+struct node_hash {
+ struct hlist_node node;
+ struct device_node *np;
+};
+
+static DEFINE_HASHTABLE(phandle_ht, 8);
+static void __init of_unittest_check_phandles(void)
+{
+ struct device_node *np;
+ struct node_hash *nh;
+ struct hlist_node *tmp;
+ int i, dup_count = 0, phandle_count = 0;
+
+ for_each_of_allnodes(np) {
+ if (!np->phandle)
+ continue;
+
+ hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
+ if (nh->np->phandle == np->phandle) {
+ pr_info("Duplicate phandle! %i used by %pOF and %pOF\n",
+ np->phandle, nh->np, np);
+ dup_count++;
+ break;
+ }
+ }
+
+ nh = kzalloc(sizeof(*nh), GFP_KERNEL);
+ if (!nh)
+ return;
+
+ nh->np = np;
+ hash_add(phandle_ht, &nh->node, np->phandle);
+ phandle_count++;
+ }
+ unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
+ dup_count, phandle_count);
+
+ /* Clean up */
+ hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
+ hash_del(&nh->node);
+ kfree(nh);
+ }
+}
+
+static void __init of_unittest_parse_phandle_with_args(void)
+{
+ struct device_node *np;
+ struct of_phandle_args args;
+ int i, rc;
+
+ np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
+ if (!np) {
+ pr_err("missing testcase data\n");
+ return;
+ }
+
+ rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
+ unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
+
+ for (i = 0; i < 8; i++) {
+ bool passed = true;
+
+ memset(&args, 0, sizeof(args));
+ rc = of_parse_phandle_with_args(np, "phandle-list",
+ "#phandle-cells", i, &args);
+
+ /* Test the values from tests-phandle.dtsi */
+ switch (i) {
+ case 0:
+ passed &= !rc;
+ passed &= (args.args_count == 1);
+ passed &= (args.args[0] == (i + 1));
+ break;
+ case 1:
+ passed &= !rc;
+ passed &= (args.args_count == 2);
+ passed &= (args.args[0] == (i + 1));
+ passed &= (args.args[1] == 0);
+ break;
+ case 2:
+ passed &= (rc == -ENOENT);
+ break;
+ case 3:
+ passed &= !rc;
+ passed &= (args.args_count == 3);
+ passed &= (args.args[0] == (i + 1));
+ passed &= (args.args[1] == 4);
+ passed &= (args.args[2] == 3);
+ break;
+ case 4:
+ passed &= !rc;
+ passed &= (args.args_count == 2);
+ passed &= (args.args[0] == (i + 1));
+ passed &= (args.args[1] == 100);
+ break;
+ case 5:
+ passed &= !rc;
+ passed &= (args.args_count == 0);
+ break;
+ case 6:
+ passed &= !rc;
+ passed &= (args.args_count == 1);
+ passed &= (args.args[0] == (i + 1));
+ break;
+ case 7:
+ passed &= (rc == -ENOENT);
+ break;
+ default:
+ passed = false;
+ }
+
+ unittest(passed, "index %i - data error on node %pOF rc=%i\n",
+ i, args.np, rc);
+
+ if (rc == 0)
+ of_node_put(args.np);
+ }
+
+ /* Check for missing list property */
+ memset(&args, 0, sizeof(args));
+ rc = of_parse_phandle_with_args(np, "phandle-list-missing",
+ "#phandle-cells", 0, &args);
+ unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
+ rc = of_count_phandle_with_args(np, "phandle-list-missing",
+ "#phandle-cells");
+ unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
+
+ /* Check for missing cells property */
+ memset(&args, 0, sizeof(args));
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
+
+ rc = of_parse_phandle_with_args(np, "phandle-list",
+ "#phandle-cells-missing", 0, &args);
+
+ EXPECT_END(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
+
+ unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
+
+ rc = of_count_phandle_with_args(np, "phandle-list",
+ "#phandle-cells-missing");
+
+ EXPECT_END(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
+
+ unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+
+ /* Check for bad phandle in list */
+ memset(&args, 0, sizeof(args));
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
+
+ rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
+ "#phandle-cells", 0, &args);
+
+ EXPECT_END(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
+
+ unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
+
+ rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
+ "#phandle-cells");
+
+ EXPECT_END(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
+
+ unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+
+ /* Check for incorrectly formed argument list */
+ memset(&args, 0, sizeof(args));
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
+
+ rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
+ "#phandle-cells", 1, &args);
+
+ EXPECT_END(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
+
+ unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
+
+ rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
+ "#phandle-cells");
+
+ EXPECT_END(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
+
+ unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+}
+
+static void __init of_unittest_parse_phandle_with_args_map(void)
+{
+ struct device_node *np, *p[6] = {};
+ struct of_phandle_args args;
+ unsigned int prefs[6];
+ int i, rc;
+
+ np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-b");
+ if (!np) {
+ pr_err("missing testcase data\n");
+ return;
+ }
+
+ p[0] = of_find_node_by_path("/testcase-data/phandle-tests/provider0");
+ p[1] = of_find_node_by_path("/testcase-data/phandle-tests/provider1");
+ p[2] = of_find_node_by_path("/testcase-data/phandle-tests/provider2");
+ p[3] = of_find_node_by_path("/testcase-data/phandle-tests/provider3");
+ p[4] = of_find_node_by_path("/testcase-data/phandle-tests/provider4");
+ p[5] = of_find_node_by_path("/testcase-data/phandle-tests/provider5");
+ for (i = 0; i < ARRAY_SIZE(p); ++i) {
+ if (!p[i]) {
+ pr_err("missing testcase data\n");
+ return;
+ }
+ prefs[i] = kref_read(&p[i]->kobj.kref);
+ }
+
+ rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
+ unittest(rc == 8, "of_count_phandle_with_args() returned %i, expected 8\n", rc);
+
+ for (i = 0; i < 9; i++) {
+ bool passed = true;
+
+ memset(&args, 0, sizeof(args));
+ rc = of_parse_phandle_with_args_map(np, "phandle-list",
+ "phandle", i, &args);
+
+ /* Test the values from tests-phandle.dtsi */
+ switch (i) {
+ case 0:
+ passed &= !rc;
+ passed &= (args.np == p[1]);
+ passed &= (args.args_count == 1);
+ passed &= (args.args[0] == 1);
+ break;
+ case 1:
+ passed &= !rc;
+ passed &= (args.np == p[3]);
+ passed &= (args.args_count == 3);
+ passed &= (args.args[0] == 2);
+ passed &= (args.args[1] == 5);
+ passed &= (args.args[2] == 3);
+ break;
+ case 2:
+ passed &= (rc == -ENOENT);
+ break;
+ case 3:
+ passed &= !rc;
+ passed &= (args.np == p[0]);
+ passed &= (args.args_count == 0);
+ break;
+ case 4:
+ passed &= !rc;
+ passed &= (args.np == p[1]);
+ passed &= (args.args_count == 1);
+ passed &= (args.args[0] == 3);
+ break;
+ case 5:
+ passed &= !rc;
+ passed &= (args.np == p[0]);
+ passed &= (args.args_count == 0);
+ break;
+ case 6:
+ passed &= !rc;
+ passed &= (args.np == p[2]);
+ passed &= (args.args_count == 2);
+ passed &= (args.args[0] == 15);
+ passed &= (args.args[1] == 0x20);
+ break;
+ case 7:
+ passed &= !rc;
+ passed &= (args.np == p[3]);
+ passed &= (args.args_count == 3);
+ passed &= (args.args[0] == 2);
+ passed &= (args.args[1] == 5);
+ passed &= (args.args[2] == 3);
+ break;
+ case 8:
+ passed &= (rc == -ENOENT);
+ break;
+ default:
+ passed = false;
+ }
+
+ unittest(passed, "index %i - data error on node %s rc=%i\n",
+ i, args.np->full_name, rc);
+
+ if (rc == 0)
+ of_node_put(args.np);
+ }
+
+ /* Check for missing list property */
+ memset(&args, 0, sizeof(args));
+ rc = of_parse_phandle_with_args_map(np, "phandle-list-missing",
+ "phandle", 0, &args);
+ unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
+
+ /* Check for missing cells,map,mask property */
+ memset(&args, 0, sizeof(args));
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1");
+
+ rc = of_parse_phandle_with_args_map(np, "phandle-list",
+ "phandle-missing", 0, &args);
+ EXPECT_END(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1");
+
+ unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+
+ /* Check for bad phandle in list */
+ memset(&args, 0, sizeof(args));
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle 12345678");
+
+ rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-phandle",
+ "phandle", 0, &args);
+ EXPECT_END(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle 12345678");
+
+ unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+
+ /* Check for incorrectly formed argument list */
+ memset(&args, 0, sizeof(args));
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-b: #phandle-cells = 2 found 1");
+
+ rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-args",
+ "phandle", 1, &args);
+ EXPECT_END(KERN_INFO,
+ "OF: /testcase-data/phandle-tests/consumer-b: #phandle-cells = 2 found 1");
+
+ unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+
+ for (i = 0; i < ARRAY_SIZE(p); ++i) {
+ unittest(prefs[i] == kref_read(&p[i]->kobj.kref),
+ "provider%d: expected:%d got:%d\n",
+ i, prefs[i], kref_read(&p[i]->kobj.kref));
+ of_node_put(p[i]);
+ }
+}
+
+static void __init of_unittest_property_string(void)
+{
+ const char *strings[4];
+ struct device_node *np;
+ int rc;
+
+ np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
+ if (!np) {
+ pr_err("No testcase data in device tree\n");
+ return;
+ }
+
+ rc = of_property_match_string(np, "phandle-list-names", "first");
+ unittest(rc == 0, "first expected:0 got:%i\n", rc);
+ rc = of_property_match_string(np, "phandle-list-names", "second");
+ unittest(rc == 1, "second expected:1 got:%i\n", rc);
+ rc = of_property_match_string(np, "phandle-list-names", "third");
+ unittest(rc == 2, "third expected:2 got:%i\n", rc);
+ rc = of_property_match_string(np, "phandle-list-names", "fourth");
+ unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
+ rc = of_property_match_string(np, "missing-property", "blah");
+ unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
+ rc = of_property_match_string(np, "empty-property", "blah");
+ unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
+ rc = of_property_match_string(np, "unterminated-string", "blah");
+ unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
+
+ /* of_property_count_strings() tests */
+ rc = of_property_count_strings(np, "string-property");
+ unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
+ rc = of_property_count_strings(np, "phandle-list-names");
+ unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
+ rc = of_property_count_strings(np, "unterminated-string");
+ unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
+ rc = of_property_count_strings(np, "unterminated-string-list");
+ unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
+
+ /* of_property_read_string_index() tests */
+ rc = of_property_read_string_index(np, "string-property", 0, strings);
+ unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
+ strings[0] = NULL;
+ rc = of_property_read_string_index(np, "string-property", 1, strings);
+ unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
+ rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
+ unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
+ rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
+ unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
+ rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
+ unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
+ strings[0] = NULL;
+ rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
+ unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
+ strings[0] = NULL;
+ rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
+ unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
+ rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
+ unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
+ strings[0] = NULL;
+ rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
+ unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
+ strings[1] = NULL;
+
+ /* of_property_read_string_array() tests */
+ rc = of_property_read_string_array(np, "string-property", strings, 4);
+ unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
+ rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
+ unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
+ rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
+ unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
+ /* -- An incorrectly formed string should cause a failure */
+ rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
+ unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
+ /* -- parsing the correctly formed strings should still work: */
+ strings[2] = NULL;
+ rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
+ unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
+ strings[1] = NULL;
+ rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
+ unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
+}
+
+#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
+ (p1)->value && (p2)->value && \
+ !memcmp((p1)->value, (p2)->value, (p1)->length) && \
+ !strcmp((p1)->name, (p2)->name))
+static void __init of_unittest_property_copy(void)
+{
+#ifdef CONFIG_OF_DYNAMIC
+ struct property p1 = { .name = "p1", .length = 0, .value = "" };
+ struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
+ struct property *new;
+
+ new = __of_prop_dup(&p1, GFP_KERNEL);
+ unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
+ kfree(new->value);
+ kfree(new->name);
+ kfree(new);
+
+ new = __of_prop_dup(&p2, GFP_KERNEL);
+ unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
+ kfree(new->value);
+ kfree(new->name);
+ kfree(new);
+#endif
+}
+
+static void __init of_unittest_changeset(void)
+{
+#ifdef CONFIG_OF_DYNAMIC
+ int ret;
+ struct property *ppadd, padd = { .name = "prop-add", .length = 1, .value = "" };
+ struct property *ppname_n1, pname_n1 = { .name = "name", .length = 3, .value = "n1" };
+ struct property *ppname_n2, pname_n2 = { .name = "name", .length = 3, .value = "n2" };
+ struct property *ppname_n21, pname_n21 = { .name = "name", .length = 3, .value = "n21" };
+ struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
+ struct property *ppremove;
+ struct device_node *n1, *n2, *n21, *n22, *nchangeset, *nremove, *parent, *np;
+ static const char * const str_array[] = { "str1", "str2", "str3" };
+ const u32 u32_array[] = { 1, 2, 3 };
+ struct of_changeset chgset;
+ const char *propstr = NULL;
+
+ n1 = __of_node_dup(NULL, "n1");
+ unittest(n1, "testcase setup failure\n");
+
+ n2 = __of_node_dup(NULL, "n2");
+ unittest(n2, "testcase setup failure\n");
+
+ n21 = __of_node_dup(NULL, "n21");
+ unittest(n21, "testcase setup failure %p\n", n21);
+
+ nchangeset = of_find_node_by_path("/testcase-data/changeset");
+ nremove = of_get_child_by_name(nchangeset, "node-remove");
+ unittest(nremove, "testcase setup failure\n");
+
+ ppadd = __of_prop_dup(&padd, GFP_KERNEL);
+ unittest(ppadd, "testcase setup failure\n");
+
+ ppname_n1 = __of_prop_dup(&pname_n1, GFP_KERNEL);
+ unittest(ppname_n1, "testcase setup failure\n");
+
+ ppname_n2 = __of_prop_dup(&pname_n2, GFP_KERNEL);
+ unittest(ppname_n2, "testcase setup failure\n");
+
+ ppname_n21 = __of_prop_dup(&pname_n21, GFP_KERNEL);
+ unittest(ppname_n21, "testcase setup failure\n");
+
+ ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
+ unittest(ppupdate, "testcase setup failure\n");
+
+ parent = nchangeset;
+ n1->parent = parent;
+ n2->parent = parent;
+ n21->parent = n2;
+
+ ppremove = of_find_property(parent, "prop-remove", NULL);
+ unittest(ppremove, "failed to find removal prop");
+
+ of_changeset_init(&chgset);
+
+ unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
+ unittest(!of_changeset_add_property(&chgset, n1, ppname_n1), "fail add prop name\n");
+
+ unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
+ unittest(!of_changeset_add_property(&chgset, n2, ppname_n2), "fail add prop name\n");
+
+ unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
+ unittest(!of_changeset_add_property(&chgset, n21, ppname_n21), "fail add prop name\n");
+
+ unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
+
+ unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop prop-add\n");
+ unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
+ unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
+ n22 = of_changeset_create_node(&chgset, n2, "n22");
+ unittest(n22, "fail create n22\n");
+ unittest(!of_changeset_add_prop_string(&chgset, n22, "prop-str", "abcd"),
+ "fail add prop prop-str");
+ unittest(!of_changeset_add_prop_string_array(&chgset, n22, "prop-str-array",
+ (const char **)str_array,
+ ARRAY_SIZE(str_array)),
+ "fail add prop prop-str-array");
+ unittest(!of_changeset_add_prop_u32_array(&chgset, n22, "prop-u32-array",
+ u32_array, ARRAY_SIZE(u32_array)),
+ "fail add prop prop-u32-array");
+
+ unittest(!of_changeset_apply(&chgset), "apply failed\n");
+
+ of_node_put(nchangeset);
+
+ /* Make sure node names are constructed correctly */
+ unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
+ "'%pOF' not added\n", n21);
+ of_node_put(np);
+ unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n22")),
+ "'%pOF' not added\n", n22);
+ of_node_put(np);
+
+ unittest(!of_changeset_revert(&chgset), "revert failed\n");
+
+ unittest(!of_find_node_by_path("/testcase-data/changeset/n2/n21"),
+ "'%pOF' still present after revert\n", n21);
+
+ ppremove = of_find_property(parent, "prop-remove", NULL);
+ unittest(ppremove, "failed to find removed prop after revert\n");
+
+ ret = of_property_read_string(parent, "prop-update", &propstr);
+ unittest(!ret, "failed to find updated prop after revert\n");
+ if (!ret)
+ unittest(strcmp(propstr, "hello") == 0, "original value not in updated property after revert");
+
+ of_changeset_destroy(&chgset);
+
+ of_node_put(n1);
+ of_node_put(n2);
+ of_node_put(n21);
+ of_node_put(n22);
+#endif
+}
+
+static void __init of_unittest_dma_get_max_cpu_address(void)
+{
+ struct device_node *np;
+ phys_addr_t cpu_addr;
+
+ if (!IS_ENABLED(CONFIG_OF_ADDRESS))
+ return;
+
+ np = of_find_node_by_path("/testcase-data/address-tests");
+ if (!np) {
+ pr_err("missing testcase data\n");
+ return;
+ }
+
+ cpu_addr = of_dma_get_max_cpu_address(np);
+ unittest(cpu_addr == 0x4fffffff,
+ "of_dma_get_max_cpu_address: wrong CPU addr %pad (expecting %x)\n",
+ &cpu_addr, 0x4fffffff);
+}
+
+static void __init of_unittest_dma_ranges_one(const char *path,
+ u64 expect_dma_addr, u64 expect_paddr)
+{
+#ifdef CONFIG_HAS_DMA
+ struct device_node *np;
+ const struct bus_dma_region *map = NULL;
+ int rc;
+
+ np = of_find_node_by_path(path);
+ if (!np) {
+ pr_err("missing testcase data\n");
+ return;
+ }
+
+ rc = of_dma_get_range(np, &map);
+
+ unittest(!rc, "of_dma_get_range failed on node %pOF rc=%i\n", np, rc);
+
+ if (!rc) {
+ phys_addr_t paddr;
+ dma_addr_t dma_addr;
+ struct device *dev_bogus;
+
+ dev_bogus = kzalloc(sizeof(struct device), GFP_KERNEL);
+ if (!dev_bogus) {
+ unittest(0, "kzalloc() failed\n");
+ kfree(map);
+ return;
+ }
+
+ dev_bogus->dma_range_map = map;
+ paddr = dma_to_phys(dev_bogus, expect_dma_addr);
+ dma_addr = phys_to_dma(dev_bogus, expect_paddr);
+
+ unittest(paddr == expect_paddr,
+ "of_dma_get_range: wrong phys addr %pap (expecting %llx) on node %pOF\n",
+ &paddr, expect_paddr, np);
+ unittest(dma_addr == expect_dma_addr,
+ "of_dma_get_range: wrong DMA addr %pad (expecting %llx) on node %pOF\n",
+ &dma_addr, expect_dma_addr, np);
+
+ kfree(map);
+ kfree(dev_bogus);
+ }
+ of_node_put(np);
+#endif
+}
+
+static void __init of_unittest_parse_dma_ranges(void)
+{
+ of_unittest_dma_ranges_one("/testcase-data/address-tests/device@70000000",
+ 0x0, 0x20000000);
+ if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT))
+ of_unittest_dma_ranges_one("/testcase-data/address-tests/bus@80000000/device@1000",
+ 0x100000000, 0x20000000);
+ of_unittest_dma_ranges_one("/testcase-data/address-tests/pci@90000000",
+ 0x80000000, 0x20000000);
+}
+
+static void __init of_unittest_pci_dma_ranges(void)
+{
+ struct device_node *np;
+ struct of_pci_range range;
+ struct of_pci_range_parser parser;
+ int i = 0;
+
+ if (!IS_ENABLED(CONFIG_PCI))
+ return;
+
+ np = of_find_node_by_path("/testcase-data/address-tests/pci@90000000");
+ if (!np) {
+ pr_err("missing testcase data\n");
+ return;
+ }
+
+ if (of_pci_dma_range_parser_init(&parser, np)) {
+ pr_err("missing dma-ranges property\n");
+ return;
+ }
+
+ /*
+ * Get the dma-ranges from the device tree
+ */
+ for_each_of_pci_range(&parser, &range) {
+ if (!i) {
+ unittest(range.size == 0x10000000,
+ "for_each_of_pci_range wrong size on node %pOF size=%llx\n",
+ np, range.size);
+ unittest(range.cpu_addr == 0x20000000,
+ "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF",
+ range.cpu_addr, np);
+ unittest(range.pci_addr == 0x80000000,
+ "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF",
+ range.pci_addr, np);
+ } else {
+ unittest(range.size == 0x10000000,
+ "for_each_of_pci_range wrong size on node %pOF size=%llx\n",
+ np, range.size);
+ unittest(range.cpu_addr == 0x40000000,
+ "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF",
+ range.cpu_addr, np);
+ unittest(range.pci_addr == 0xc0000000,
+ "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF",
+ range.pci_addr, np);
+ }
+ i++;
+ }
+
+ of_node_put(np);
+}
+
+static void __init of_unittest_bus_ranges(void)
+{
+ struct device_node *np;
+ struct of_range range;
+ struct of_range_parser parser;
+ struct resource res;
+ int ret, count, i = 0;
+
+ np = of_find_node_by_path("/testcase-data/address-tests");
+ if (!np) {
+ pr_err("missing testcase data\n");
+ return;
+ }
+
+ if (of_range_parser_init(&parser, np)) {
+ pr_err("missing ranges property\n");
+ return;
+ }
+
+ ret = of_range_to_resource(np, 1, &res);
+ unittest(!ret, "of_range_to_resource returned error (%d) node %pOF\n",
+ ret, np);
+ unittest(resource_type(&res) == IORESOURCE_MEM,
+ "of_range_to_resource wrong resource type on node %pOF res=%pR\n",
+ np, &res);
+ unittest(res.start == 0xd0000000,
+ "of_range_to_resource wrong resource start address on node %pOF res=%pR\n",
+ np, &res);
+ unittest(resource_size(&res) == 0x20000000,
+ "of_range_to_resource wrong resource start address on node %pOF res=%pR\n",
+ np, &res);
+
+ count = of_range_count(&parser);
+ unittest(count == 2,
+ "of_range_count wrong size on node %pOF count=%d\n",
+ np, count);
+
+ /*
+ * Get the "ranges" from the device tree
+ */
+ for_each_of_range(&parser, &range) {
+ unittest(range.flags == IORESOURCE_MEM,
+ "for_each_of_range wrong flags on node %pOF flags=%x (expected %x)\n",
+ np, range.flags, IORESOURCE_MEM);
+ if (!i) {
+ unittest(range.size == 0x50000000,
+ "for_each_of_range wrong size on node %pOF size=%llx\n",
+ np, range.size);
+ unittest(range.cpu_addr == 0x70000000,
+ "for_each_of_range wrong CPU addr (%llx) on node %pOF",
+ range.cpu_addr, np);
+ unittest(range.bus_addr == 0x70000000,
+ "for_each_of_range wrong bus addr (%llx) on node %pOF",
+ range.pci_addr, np);
+ } else {
+ unittest(range.size == 0x20000000,
+ "for_each_of_range wrong size on node %pOF size=%llx\n",
+ np, range.size);
+ unittest(range.cpu_addr == 0xd0000000,
+ "for_each_of_range wrong CPU addr (%llx) on node %pOF",
+ range.cpu_addr, np);
+ unittest(range.bus_addr == 0x00000000,
+ "for_each_of_range wrong bus addr (%llx) on node %pOF",
+ range.pci_addr, np);
+ }
+ i++;
+ }
+
+ of_node_put(np);
+}
+
+static void __init of_unittest_bus_3cell_ranges(void)
+{
+ struct device_node *np;
+ struct of_range range;
+ struct of_range_parser parser;
+ int i = 0;
+
+ np = of_find_node_by_path("/testcase-data/address-tests/bus@a0000000");
+ if (!np) {
+ pr_err("missing testcase data\n");
+ return;
+ }
+
+ if (of_range_parser_init(&parser, np)) {
+ pr_err("missing ranges property\n");
+ return;
+ }
+
+ /*
+ * Get the "ranges" from the device tree
+ */
+ for_each_of_range(&parser, &range) {
+ if (!i) {
+ unittest(range.flags == 0xf00baa,
+ "for_each_of_range wrong flags on node %pOF flags=%x\n",
+ np, range.flags);
+ unittest(range.size == 0x100000,
+ "for_each_of_range wrong size on node %pOF size=%llx\n",
+ np, range.size);
+ unittest(range.cpu_addr == 0xa0000000,
+ "for_each_of_range wrong CPU addr (%llx) on node %pOF",
+ range.cpu_addr, np);
+ unittest(range.bus_addr == 0x0,
+ "for_each_of_range wrong bus addr (%llx) on node %pOF",
+ range.pci_addr, np);
+ } else {
+ unittest(range.flags == 0xf00bee,
+ "for_each_of_range wrong flags on node %pOF flags=%x\n",
+ np, range.flags);
+ unittest(range.size == 0x200000,
+ "for_each_of_range wrong size on node %pOF size=%llx\n",
+ np, range.size);
+ unittest(range.cpu_addr == 0xb0000000,
+ "for_each_of_range wrong CPU addr (%llx) on node %pOF",
+ range.cpu_addr, np);
+ unittest(range.bus_addr == 0x100000000,
+ "for_each_of_range wrong bus addr (%llx) on node %pOF",
+ range.pci_addr, np);
+ }
+ i++;
+ }
+
+ of_node_put(np);
+}
+
+static void __init of_unittest_reg(void)
+{
+ struct device_node *np;
+ int ret;
+ u64 addr, size;
+
+ np = of_find_node_by_path("/testcase-data/address-tests/bus@80000000/device@1000");
+ if (!np) {
+ pr_err("missing testcase data\n");
+ return;
+ }
+
+ ret = of_property_read_reg(np, 0, &addr, &size);
+ unittest(!ret, "of_property_read_reg(%pOF) returned error %d\n",
+ np, ret);
+ unittest(addr == 0x1000, "of_property_read_reg(%pOF) untranslated address (%llx) incorrect\n",
+ np, addr);
+
+ of_node_put(np);
+}
+
+static void __init of_unittest_parse_interrupts(void)
+{
+ struct device_node *np;
+ struct of_phandle_args args;
+ int i, rc;
+
+ if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
+ return;
+
+ np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
+ if (!np) {
+ pr_err("missing testcase data\n");
+ return;
+ }
+
+ for (i = 0; i < 4; i++) {
+ bool passed = true;
+
+ memset(&args, 0, sizeof(args));
+ rc = of_irq_parse_one(np, i, &args);
+
+ passed &= !rc;
+ passed &= (args.args_count == 1);
+ passed &= (args.args[0] == (i + 1));
+
+ unittest(passed, "index %i - data error on node %pOF rc=%i\n",
+ i, args.np, rc);
+ }
+ of_node_put(np);
+
+ np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
+ if (!np) {
+ pr_err("missing testcase data\n");
+ return;
+ }
+
+ for (i = 0; i < 4; i++) {
+ bool passed = true;
+
+ memset(&args, 0, sizeof(args));
+ rc = of_irq_parse_one(np, i, &args);
+
+ /* Test the values from tests-phandle.dtsi */
+ switch (i) {
+ case 0:
+ passed &= !rc;
+ passed &= (args.args_count == 1);
+ passed &= (args.args[0] == 9);
+ break;
+ case 1:
+ passed &= !rc;
+ passed &= (args.args_count == 3);
+ passed &= (args.args[0] == 10);
+ passed &= (args.args[1] == 11);
+ passed &= (args.args[2] == 12);
+ break;
+ case 2:
+ passed &= !rc;
+ passed &= (args.args_count == 2);
+ passed &= (args.args[0] == 13);
+ passed &= (args.args[1] == 14);
+ break;
+ case 3:
+ passed &= !rc;
+ passed &= (args.args_count == 2);
+ passed &= (args.args[0] == 15);
+ passed &= (args.args[1] == 16);
+ break;
+ default:
+ passed = false;
+ }
+ unittest(passed, "index %i - data error on node %pOF rc=%i\n",
+ i, args.np, rc);
+ }
+ of_node_put(np);
+}
+
+static void __init of_unittest_parse_interrupts_extended(void)
+{
+ struct device_node *np;
+ struct of_phandle_args args;
+ int i, rc;
+
+ if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
+ return;
+
+ np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
+ if (!np) {
+ pr_err("missing testcase data\n");
+ return;
+ }
+
+ for (i = 0; i < 7; i++) {
+ bool passed = true;
+
+ memset(&args, 0, sizeof(args));
+ 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:
+ /*
+ * Tests child node that is missing property
+ * #address-cells. See the comments in
+ * drivers/of/unittest-data/tests-interrupts.dtsi
+ * nodes intmap1 and interrupts-extended0
+ */
+ passed &= !rc;
+ passed &= (args.args_count == 1);
+ passed &= (args.args[0] == 15);
+ break;
+ default:
+ passed = false;
+ }
+
+ unittest(passed, "index %i - data error on node %pOF rc=%i\n",
+ i, args.np, rc);
+ }
+ of_node_put(np);
+}
+
+static const struct of_device_id match_node_table[] = {
+ { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
+ { .data = "B", .type = "type1", }, /* followed by type alone */
+
+ { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
+ { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
+ { .data = "Cc", .name = "name2", .type = "type2", },
+
+ { .data = "E", .compatible = "compat3" },
+ { .data = "G", .compatible = "compat2", },
+ { .data = "H", .compatible = "compat2", .name = "name5", },
+ { .data = "I", .compatible = "compat2", .type = "type1", },
+ { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
+ { .data = "K", .compatible = "compat2", .name = "name9", },
+ {}
+};
+
+static struct {
+ const char *path;
+ const char *data;
+} match_node_tests[] = {
+ { .path = "/testcase-data/match-node/name0", .data = "A", },
+ { .path = "/testcase-data/match-node/name1", .data = "B", },
+ { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
+ { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
+ { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
+ { .path = "/testcase-data/match-node/name3", .data = "E", },
+ { .path = "/testcase-data/match-node/name4", .data = "G", },
+ { .path = "/testcase-data/match-node/name5", .data = "H", },
+ { .path = "/testcase-data/match-node/name6", .data = "G", },
+ { .path = "/testcase-data/match-node/name7", .data = "I", },
+ { .path = "/testcase-data/match-node/name8", .data = "J", },
+ { .path = "/testcase-data/match-node/name9", .data = "K", },
+};
+
+static void __init of_unittest_match_node(void)
+{
+ struct device_node *np;
+ const struct of_device_id *match;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
+ np = of_find_node_by_path(match_node_tests[i].path);
+ if (!np) {
+ unittest(0, "missing testcase node %s\n",
+ match_node_tests[i].path);
+ continue;
+ }
+
+ match = of_match_node(match_node_table, np);
+ if (!match) {
+ unittest(0, "%s didn't match anything\n",
+ match_node_tests[i].path);
+ continue;
+ }
+
+ if (strcmp(match->data, match_node_tests[i].data) != 0) {
+ unittest(0, "%s got wrong match. expected %s, got %s\n",
+ match_node_tests[i].path, match_node_tests[i].data,
+ (const char *)match->data);
+ continue;
+ }
+ unittest(1, "passed");
+ }
+}
+
+static struct resource test_bus_res = DEFINE_RES_MEM(0xfffffff8, 2);
+static const struct platform_device_info test_bus_info = {
+ .name = "unittest-bus",
+};
+static void __init of_unittest_platform_populate(void)
+{
+ int irq, rc;
+ struct device_node *np, *child, *grandchild;
+ struct platform_device *pdev, *test_bus;
+ const struct of_device_id match[] = {
+ { .compatible = "test-device", },
+ {}
+ };
+
+ np = of_find_node_by_path("/testcase-data");
+ of_platform_default_populate(np, NULL, NULL);
+
+ /* Test that a missing irq domain returns -EPROBE_DEFER */
+ np = of_find_node_by_path("/testcase-data/testcase-device1");
+ pdev = of_find_device_by_node(np);
+ unittest(pdev, "device 1 creation failed\n");
+
+ if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) {
+ irq = platform_get_irq(pdev, 0);
+ unittest(irq == -EPROBE_DEFER,
+ "device deferred probe failed - %d\n", irq);
+
+ /* Test that a parsing failure does not return -EPROBE_DEFER */
+ np = of_find_node_by_path("/testcase-data/testcase-device2");
+ pdev = of_find_device_by_node(np);
+ unittest(pdev, "device 2 creation failed\n");
+
+ EXPECT_BEGIN(KERN_INFO,
+ "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found");
+
+ irq = platform_get_irq(pdev, 0);
+
+ EXPECT_END(KERN_INFO,
+ "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found");
+
+ unittest(irq < 0 && irq != -EPROBE_DEFER,
+ "device parsing error failed - %d\n", irq);
+ }
+
+ np = of_find_node_by_path("/testcase-data/platform-tests");
+ unittest(np, "No testcase data in device tree\n");
+ if (!np)
+ return;
+
+ test_bus = platform_device_register_full(&test_bus_info);
+ rc = PTR_ERR_OR_ZERO(test_bus);
+ unittest(!rc, "testbus registration failed; rc=%i\n", rc);
+ if (rc) {
+ of_node_put(np);
+ return;
+ }
+ test_bus->dev.of_node = np;
+
+ /*
+ * Add a dummy resource to the test bus node after it is
+ * registered to catch problems with un-inserted resources. The
+ * DT code doesn't insert the resources, and it has caused the
+ * kernel to oops in the past. This makes sure the same bug
+ * doesn't crop up again.
+ */
+ platform_device_add_resources(test_bus, &test_bus_res, 1);
+
+ of_platform_populate(np, match, NULL, &test_bus->dev);
+ for_each_child_of_node(np, child) {
+ for_each_child_of_node(child, grandchild) {
+ pdev = of_find_device_by_node(grandchild);
+ unittest(pdev,
+ "Could not create device for node '%pOFn'\n",
+ grandchild);
+ platform_device_put(pdev);
+ }
+ }
+
+ of_platform_depopulate(&test_bus->dev);
+ for_each_child_of_node(np, child) {
+ for_each_child_of_node(child, grandchild)
+ unittest(!of_find_device_by_node(grandchild),
+ "device didn't get destroyed '%pOFn'\n",
+ grandchild);
+ }
+
+ platform_device_unregister(test_bus);
+ of_node_put(np);
+}
+
+/**
+ * update_node_properties - adds the properties
+ * of np into dup node (present in live tree) and
+ * updates parent of children of np to dup.
+ *
+ * @np: node whose properties are being added to the live tree
+ * @dup: node present in live tree to be updated
+ */
+static void update_node_properties(struct device_node *np,
+ struct device_node *dup)
+{
+ struct property *prop;
+ struct property *save_next;
+ struct device_node *child;
+ int ret;
+
+ for_each_child_of_node(np, child)
+ child->parent = dup;
+
+ /*
+ * "unittest internal error: unable to add testdata property"
+ *
+ * If this message reports a property in node '/__symbols__' then
+ * the respective unittest overlay contains a label that has the
+ * same name as a label in the live devicetree. The label will
+ * be in the live devicetree only if the devicetree source was
+ * compiled with the '-@' option. If you encounter this error,
+ * please consider renaming __all__ of the labels in the unittest
+ * overlay dts files with an odd prefix that is unlikely to be
+ * used in a real devicetree.
+ */
+
+ /*
+ * open code for_each_property_of_node() because of_add_property()
+ * sets prop->next to NULL
+ */
+ for (prop = np->properties; prop != NULL; prop = save_next) {
+ save_next = prop->next;
+ ret = of_add_property(dup, prop);
+ if (ret) {
+ if (ret == -EEXIST && !strcmp(prop->name, "name"))
+ continue;
+ pr_err("unittest internal error: unable to add testdata property %pOF/%s",
+ np, prop->name);
+ }
+ }
+}
+
+/**
+ * attach_node_and_children - attaches nodes
+ * and its children to live tree.
+ * CAUTION: misleading function name - if node @np already exists in
+ * the live tree then children of @np are *not* attached to the live
+ * tree. This works for the current test devicetree nodes because such
+ * nodes do not have child nodes.
+ *
+ * @np: Node to attach to live tree
+ */
+static void attach_node_and_children(struct device_node *np)
+{
+ struct device_node *next, *dup, *child;
+ unsigned long flags;
+ const char *full_name;
+
+ full_name = kasprintf(GFP_KERNEL, "%pOF", np);
+ if (!full_name)
+ return;
+
+ if (!strcmp(full_name, "/__local_fixups__") ||
+ !strcmp(full_name, "/__fixups__")) {
+ kfree(full_name);
+ return;
+ }
+
+ dup = of_find_node_by_path(full_name);
+ kfree(full_name);
+ if (dup) {
+ update_node_properties(np, dup);
+ return;
+ }
+
+ child = np->child;
+ np->child = NULL;
+
+ mutex_lock(&of_mutex);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
+ np->sibling = np->parent->child;
+ np->parent->child = np;
+ of_node_clear_flag(np, OF_DETACHED);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
+
+ __of_attach_node_sysfs(np);
+ mutex_unlock(&of_mutex);
+
+ while (child) {
+ next = child->sibling;
+ attach_node_and_children(child);
+ child = next;
+ }
+}
+
+/**
+ * unittest_data_add - Reads, copies data from
+ * linked tree and attaches it to the live tree
+ */
+static int __init unittest_data_add(void)
+{
+ void *unittest_data;
+ void *unittest_data_align;
+ struct device_node *unittest_data_node = NULL, *np;
+ /*
+ * __dtbo_testcases_begin[] and __dtbo_testcases_end[] are magically
+ * created by cmd_dt_S_dtbo in scripts/Makefile.lib
+ */
+ extern uint8_t __dtbo_testcases_begin[];
+ extern uint8_t __dtbo_testcases_end[];
+ const int size = __dtbo_testcases_end - __dtbo_testcases_begin;
+ int rc;
+ void *ret;
+
+ if (!size) {
+ pr_warn("%s: testcases is empty\n", __func__);
+ return -ENODATA;
+ }
+
+ /* creating copy */
+ unittest_data = kmalloc(size + FDT_ALIGN_SIZE, GFP_KERNEL);
+ if (!unittest_data)
+ return -ENOMEM;
+
+ unittest_data_align = PTR_ALIGN(unittest_data, FDT_ALIGN_SIZE);
+ memcpy(unittest_data_align, __dtbo_testcases_begin, size);
+
+ ret = of_fdt_unflatten_tree(unittest_data_align, NULL, &unittest_data_node);
+ if (!ret) {
+ pr_warn("%s: unflatten testcases tree failed\n", __func__);
+ kfree(unittest_data);
+ return -ENODATA;
+ }
+ if (!unittest_data_node) {
+ pr_warn("%s: testcases tree is empty\n", __func__);
+ kfree(unittest_data);
+ return -ENODATA;
+ }
+
+ /*
+ * This lock normally encloses of_resolve_phandles()
+ */
+ of_overlay_mutex_lock();
+
+ rc = of_resolve_phandles(unittest_data_node);
+ if (rc) {
+ pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
+ of_overlay_mutex_unlock();
+ return -EINVAL;
+ }
+
+ if (!of_root) {
+ of_root = unittest_data_node;
+ for_each_of_allnodes(np)
+ __of_attach_node_sysfs(np);
+ of_aliases = of_find_node_by_path("/aliases");
+ of_chosen = of_find_node_by_path("/chosen");
+ of_overlay_mutex_unlock();
+ return 0;
+ }
+
+ EXPECT_BEGIN(KERN_INFO,
+ "Duplicate name in testcase-data, renamed to \"duplicate-name#1\"");
+
+ /* attach the sub-tree to live tree */
+ np = unittest_data_node->child;
+ while (np) {
+ struct device_node *next = np->sibling;
+
+ np->parent = of_root;
+ /* this will clear OF_DETACHED in np and children */
+ attach_node_and_children(np);
+ np = next;
+ }
+
+ EXPECT_END(KERN_INFO,
+ "Duplicate name in testcase-data, renamed to \"duplicate-name#1\"");
+
+ of_overlay_mutex_unlock();
+
+ return 0;
+}
+
+#ifdef CONFIG_OF_OVERLAY
+static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id);
+
+static int unittest_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+
+ if (np == NULL) {
+ dev_err(dev, "No OF data for device\n");
+ return -EINVAL;
+
+ }
+
+ dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
+
+ of_platform_populate(np, NULL, NULL, &pdev->dev);
+
+ return 0;
+}
+
+static void unittest_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+
+ dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
+}
+
+static const struct of_device_id unittest_match[] = {
+ { .compatible = "unittest", },
+ {},
+};
+
+static struct platform_driver unittest_driver = {
+ .probe = unittest_probe,
+ .remove_new = unittest_remove,
+ .driver = {
+ .name = "unittest",
+ .of_match_table = unittest_match,
+ },
+};
+
+/* get the platform device instantiated at the path */
+static struct platform_device *of_path_to_platform_device(const char *path)
+{
+ struct device_node *np;
+ struct platform_device *pdev;
+
+ np = of_find_node_by_path(path);
+ if (np == NULL)
+ return NULL;
+
+ pdev = of_find_device_by_node(np);
+ of_node_put(np);
+
+ return pdev;
+}
+
+/* find out if a platform device exists at that path */
+static int of_path_platform_device_exists(const char *path)
+{
+ struct platform_device *pdev;
+
+ pdev = of_path_to_platform_device(path);
+ platform_device_put(pdev);
+ return pdev != NULL;
+}
+
+#ifdef CONFIG_OF_GPIO
+
+struct unittest_gpio_dev {
+ struct gpio_chip chip;
+};
+
+static int unittest_gpio_chip_request_count;
+static int unittest_gpio_probe_count;
+static int unittest_gpio_probe_pass_count;
+
+static int unittest_gpio_chip_request(struct gpio_chip *chip, unsigned int offset)
+{
+ unittest_gpio_chip_request_count++;
+
+ pr_debug("%s(): %s %d %d\n", __func__, chip->label, offset,
+ unittest_gpio_chip_request_count);
+ return 0;
+}
+
+static int unittest_gpio_probe(struct platform_device *pdev)
+{
+ struct unittest_gpio_dev *devptr;
+ int ret;
+
+ unittest_gpio_probe_count++;
+
+ devptr = kzalloc(sizeof(*devptr), GFP_KERNEL);
+ if (!devptr)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, devptr);
+
+ devptr->chip.fwnode = dev_fwnode(&pdev->dev);
+ devptr->chip.label = "of-unittest-gpio";
+ devptr->chip.base = -1; /* dynamic allocation */
+ devptr->chip.ngpio = 5;
+ devptr->chip.request = unittest_gpio_chip_request;
+
+ ret = gpiochip_add_data(&devptr->chip, NULL);
+
+ unittest(!ret,
+ "gpiochip_add_data() for node @%pfw failed, ret = %d\n", devptr->chip.fwnode, ret);
+
+ if (!ret)
+ unittest_gpio_probe_pass_count++;
+ return ret;
+}
+
+static void unittest_gpio_remove(struct platform_device *pdev)
+{
+ struct unittest_gpio_dev *devptr = platform_get_drvdata(pdev);
+ struct device *dev = &pdev->dev;
+
+ dev_dbg(dev, "%s for node @%pfw\n", __func__, devptr->chip.fwnode);
+
+ if (devptr->chip.base != -1)
+ gpiochip_remove(&devptr->chip);
+
+ kfree(devptr);
+}
+
+static const struct of_device_id unittest_gpio_id[] = {
+ { .compatible = "unittest-gpio", },
+ {}
+};
+
+static struct platform_driver unittest_gpio_driver = {
+ .probe = unittest_gpio_probe,
+ .remove_new = unittest_gpio_remove,
+ .driver = {
+ .name = "unittest-gpio",
+ .of_match_table = unittest_gpio_id,
+ },
+};
+
+static void __init of_unittest_overlay_gpio(void)
+{
+ int chip_request_count;
+ int probe_pass_count;
+ int ret;
+
+ /*
+ * tests: apply overlays before registering driver
+ * Similar to installing a driver as a module, the
+ * driver is registered after applying the overlays.
+ *
+ * The overlays are applied by overlay_data_apply()
+ * instead of of_unittest_apply_overlay() so that they
+ * will not be tracked. Thus they will not be removed
+ * by of_unittest_remove_tracked_overlays().
+ *
+ * - apply overlay_gpio_01
+ * - apply overlay_gpio_02a
+ * - apply overlay_gpio_02b
+ * - register driver
+ *
+ * register driver will result in
+ * - probe and processing gpio hog for overlay_gpio_01
+ * - probe for overlay_gpio_02a
+ * - processing gpio for overlay_gpio_02b
+ */
+
+ probe_pass_count = unittest_gpio_probe_pass_count;
+ chip_request_count = unittest_gpio_chip_request_count;
+
+ /*
+ * overlay_gpio_01 contains gpio node and child gpio hog node
+ * overlay_gpio_02a contains gpio node
+ * overlay_gpio_02b contains child gpio hog node
+ */
+
+ unittest(overlay_data_apply("overlay_gpio_01", NULL),
+ "Adding overlay 'overlay_gpio_01' failed\n");
+
+ unittest(overlay_data_apply("overlay_gpio_02a", NULL),
+ "Adding overlay 'overlay_gpio_02a' failed\n");
+
+ unittest(overlay_data_apply("overlay_gpio_02b", NULL),
+ "Adding overlay 'overlay_gpio_02b' failed\n");
+
+ ret = platform_driver_register(&unittest_gpio_driver);
+ if (unittest(ret == 0, "could not register unittest gpio driver\n"))
+ return;
+
+ unittest(probe_pass_count + 2 == unittest_gpio_probe_pass_count,
+ "unittest_gpio_probe() failed or not called\n");
+
+ unittest(chip_request_count + 2 == unittest_gpio_chip_request_count,
+ "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
+ unittest_gpio_chip_request_count - chip_request_count);
+
+ /*
+ * tests: apply overlays after registering driver
+ *
+ * Similar to a driver built-in to the kernel, the
+ * driver is registered before applying the overlays.
+ *
+ * overlay_gpio_03 contains gpio node and child gpio hog node
+ *
+ * - apply overlay_gpio_03
+ *
+ * apply overlay will result in
+ * - probe and processing gpio hog.
+ */
+
+ probe_pass_count = unittest_gpio_probe_pass_count;
+ chip_request_count = unittest_gpio_chip_request_count;
+
+ /* overlay_gpio_03 contains gpio node and child gpio hog node */
+
+ unittest(overlay_data_apply("overlay_gpio_03", NULL),
+ "Adding overlay 'overlay_gpio_03' failed\n");
+
+ unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
+ "unittest_gpio_probe() failed or not called\n");
+
+ unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
+ "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
+ unittest_gpio_chip_request_count - chip_request_count);
+
+ /*
+ * overlay_gpio_04a contains gpio node
+ *
+ * - apply overlay_gpio_04a
+ *
+ * apply the overlay will result in
+ * - probe for overlay_gpio_04a
+ */
+
+ probe_pass_count = unittest_gpio_probe_pass_count;
+ chip_request_count = unittest_gpio_chip_request_count;
+
+ /* overlay_gpio_04a contains gpio node */
+
+ unittest(overlay_data_apply("overlay_gpio_04a", NULL),
+ "Adding overlay 'overlay_gpio_04a' failed\n");
+
+ unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
+ "unittest_gpio_probe() failed or not called\n");
+
+ /*
+ * overlay_gpio_04b contains child gpio hog node
+ *
+ * - apply overlay_gpio_04b
+ *
+ * apply the overlay will result in
+ * - processing gpio for overlay_gpio_04b
+ */
+
+ /* overlay_gpio_04b contains child gpio hog node */
+
+ unittest(overlay_data_apply("overlay_gpio_04b", NULL),
+ "Adding overlay 'overlay_gpio_04b' failed\n");
+
+ unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
+ "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
+ unittest_gpio_chip_request_count - chip_request_count);
+}
+
+#else
+
+static void __init of_unittest_overlay_gpio(void)
+{
+ /* skip tests */
+}
+
+#endif
+
+#if IS_BUILTIN(CONFIG_I2C)
+
+/* get the i2c client device instantiated at the path */
+static struct i2c_client *of_path_to_i2c_client(const char *path)
+{
+ struct device_node *np;
+ struct i2c_client *client;
+
+ np = of_find_node_by_path(path);
+ if (np == NULL)
+ return NULL;
+
+ client = of_find_i2c_device_by_node(np);
+ of_node_put(np);
+
+ return client;
+}
+
+/* find out if a i2c client device exists at that path */
+static int of_path_i2c_client_exists(const char *path)
+{
+ struct i2c_client *client;
+
+ client = of_path_to_i2c_client(path);
+ if (client)
+ put_device(&client->dev);
+ return client != NULL;
+}
+#else
+static int of_path_i2c_client_exists(const char *path)
+{
+ return 0;
+}
+#endif
+
+enum overlay_type {
+ PDEV_OVERLAY,
+ I2C_OVERLAY
+};
+
+static int of_path_device_type_exists(const char *path,
+ enum overlay_type ovtype)
+{
+ switch (ovtype) {
+ case PDEV_OVERLAY:
+ return of_path_platform_device_exists(path);
+ case I2C_OVERLAY:
+ return of_path_i2c_client_exists(path);
+ }
+ return 0;
+}
+
+static const char *unittest_path(int nr, enum overlay_type ovtype)
+{
+ const char *base;
+ static char buf[256];
+
+ switch (ovtype) {
+ case PDEV_OVERLAY:
+ base = "/testcase-data/overlay-node/test-bus";
+ break;
+ case I2C_OVERLAY:
+ base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
+ break;
+ default:
+ buf[0] = '\0';
+ return buf;
+ }
+ snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
+ buf[sizeof(buf) - 1] = '\0';
+ return buf;
+}
+
+static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
+{
+ const char *path;
+
+ path = unittest_path(unittest_nr, ovtype);
+
+ switch (ovtype) {
+ case PDEV_OVERLAY:
+ return of_path_platform_device_exists(path);
+ case I2C_OVERLAY:
+ return of_path_i2c_client_exists(path);
+ }
+ return 0;
+}
+
+static const char *overlay_name_from_nr(int nr)
+{
+ static char buf[256];
+
+ snprintf(buf, sizeof(buf) - 1,
+ "overlay_%d", nr);
+ buf[sizeof(buf) - 1] = '\0';
+
+ return buf;
+}
+
+static const char *bus_path = "/testcase-data/overlay-node/test-bus";
+
+#define MAX_TRACK_OVCS_IDS 256
+
+static int track_ovcs_id[MAX_TRACK_OVCS_IDS];
+static int track_ovcs_id_overlay_nr[MAX_TRACK_OVCS_IDS];
+static int track_ovcs_id_cnt;
+
+static void of_unittest_track_overlay(int ovcs_id, int overlay_nr)
+{
+ if (WARN_ON(track_ovcs_id_cnt >= MAX_TRACK_OVCS_IDS))
+ return;
+
+ track_ovcs_id[track_ovcs_id_cnt] = ovcs_id;
+ track_ovcs_id_overlay_nr[track_ovcs_id_cnt] = overlay_nr;
+ track_ovcs_id_cnt++;
+}
+
+static void of_unittest_untrack_overlay(int ovcs_id)
+{
+ if (WARN_ON(track_ovcs_id_cnt < 1))
+ return;
+
+ track_ovcs_id_cnt--;
+
+ /* If out of synch then test is broken. Do not try to recover. */
+ WARN_ON(track_ovcs_id[track_ovcs_id_cnt] != ovcs_id);
+}
+
+static void of_unittest_remove_tracked_overlays(void)
+{
+ int ret, ovcs_id, overlay_nr, save_ovcs_id;
+ const char *overlay_name;
+
+ while (track_ovcs_id_cnt > 0) {
+
+ ovcs_id = track_ovcs_id[track_ovcs_id_cnt - 1];
+ overlay_nr = track_ovcs_id_overlay_nr[track_ovcs_id_cnt - 1];
+ save_ovcs_id = ovcs_id;
+ ret = of_overlay_remove(&ovcs_id);
+ if (ret == -ENODEV) {
+ overlay_name = overlay_name_from_nr(overlay_nr);
+ pr_warn("%s: of_overlay_remove() for overlay \"%s\" failed, ret = %d\n",
+ __func__, overlay_name, ret);
+ }
+ of_unittest_untrack_overlay(save_ovcs_id);
+ }
+
+}
+
+static int __init of_unittest_apply_overlay(int overlay_nr, int *ovcs_id)
+{
+ /*
+ * The overlay will be tracked, thus it will be removed
+ * by of_unittest_remove_tracked_overlays().
+ */
+
+ const char *overlay_name;
+
+ overlay_name = overlay_name_from_nr(overlay_nr);
+
+ if (!overlay_data_apply(overlay_name, ovcs_id)) {
+ unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
+ return -EFAULT;
+ }
+ of_unittest_track_overlay(*ovcs_id, overlay_nr);
+
+ return 0;
+}
+
+static int __init __of_unittest_apply_overlay_check(int overlay_nr,
+ int unittest_nr, int before, int after,
+ enum overlay_type ovtype)
+{
+ int ret, ovcs_id;
+
+ /* unittest device must be in before state */
+ if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
+ unittest(0, "%s with device @\"%s\" %s\n",
+ overlay_name_from_nr(overlay_nr),
+ unittest_path(unittest_nr, ovtype),
+ !before ? "enabled" : "disabled");
+ return -EINVAL;
+ }
+
+ /* apply the overlay */
+ ovcs_id = 0;
+ ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id);
+ if (ret != 0) {
+ /* of_unittest_apply_overlay already called unittest() */
+ return ret;
+ }
+
+ /* unittest device must be in after state */
+ if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
+ unittest(0, "%s with device @\"%s\" %s\n",
+ overlay_name_from_nr(overlay_nr),
+ unittest_path(unittest_nr, ovtype),
+ !after ? "enabled" : "disabled");
+ return -EINVAL;
+ }
+
+ return ovcs_id;
+}
+
+/* apply an overlay while checking before and after states */
+static int __init of_unittest_apply_overlay_check(int overlay_nr,
+ int unittest_nr, int before, int after,
+ enum overlay_type ovtype)
+{
+ int ovcs_id = __of_unittest_apply_overlay_check(overlay_nr,
+ unittest_nr, before, after, ovtype);
+ if (ovcs_id < 0)
+ return ovcs_id;
+
+ return 0;
+}
+
+/* apply an overlay and then revert it while checking before, after states */
+static int __init of_unittest_apply_revert_overlay_check(int overlay_nr,
+ int unittest_nr, int before, int after,
+ enum overlay_type ovtype)
+{
+ int ret, ovcs_id, save_ovcs_id;
+
+ ovcs_id = __of_unittest_apply_overlay_check(overlay_nr, unittest_nr,
+ before, after, ovtype);
+ if (ovcs_id < 0)
+ return ovcs_id;
+
+ /* remove the overlay */
+ save_ovcs_id = ovcs_id;
+ ret = of_overlay_remove(&ovcs_id);
+ if (ret != 0) {
+ unittest(0, "%s failed to be destroyed @\"%s\"\n",
+ overlay_name_from_nr(overlay_nr),
+ unittest_path(unittest_nr, ovtype));
+ return ret;
+ }
+ of_unittest_untrack_overlay(save_ovcs_id);
+
+ /* unittest device must be again in before state */
+ if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
+ unittest(0, "%s with device @\"%s\" %s\n",
+ overlay_name_from_nr(overlay_nr),
+ unittest_path(unittest_nr, ovtype),
+ !before ? "enabled" : "disabled");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* test activation of device */
+static void __init of_unittest_overlay_0(void)
+{
+ int ret;
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status");
+
+ /* device should enable */
+ ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
+
+ EXPECT_END(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status");
+
+ if (ret)
+ return;
+
+ unittest(1, "overlay test %d passed\n", 0);
+}
+
+/* test deactivation of device */
+static void __init of_unittest_overlay_1(void)
+{
+ int ret;
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status");
+
+ /* device should disable */
+ ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
+
+ EXPECT_END(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status");
+
+ if (ret)
+ return;
+
+ unittest(1, "overlay test %d passed\n", 1);
+
+}
+
+/* test activation of device */
+static void __init of_unittest_overlay_2(void)
+{
+ int ret;
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status");
+
+ /* device should enable */
+ ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
+
+ EXPECT_END(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status");
+
+ if (ret)
+ return;
+ unittest(1, "overlay test %d passed\n", 2);
+}
+
+/* test deactivation of device */
+static void __init of_unittest_overlay_3(void)
+{
+ int ret;
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status");
+
+ /* device should disable */
+ ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
+
+ EXPECT_END(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status");
+
+ if (ret)
+ return;
+
+ unittest(1, "overlay test %d passed\n", 3);
+}
+
+/* test activation of a full device node */
+static void __init of_unittest_overlay_4(void)
+{
+ /* device should disable */
+ if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY))
+ return;
+
+ unittest(1, "overlay test %d passed\n", 4);
+}
+
+/* test overlay apply/revert sequence */
+static void __init of_unittest_overlay_5(void)
+{
+ int ret;
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status");
+
+ /* device should disable */
+ ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
+
+ EXPECT_END(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status");
+
+ if (ret)
+ return;
+
+ unittest(1, "overlay test %d passed\n", 5);
+}
+
+/* test overlay application in sequence */
+static void __init of_unittest_overlay_6(void)
+{
+ int i, save_ovcs_id[2], ovcs_id;
+ int overlay_nr = 6, unittest_nr = 6;
+ int before = 0, after = 1;
+ const char *overlay_name;
+
+ int ret;
+
+ /* unittest device must be in before state */
+ for (i = 0; i < 2; i++) {
+ if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
+ != before) {
+ unittest(0, "%s with device @\"%s\" %s\n",
+ overlay_name_from_nr(overlay_nr + i),
+ unittest_path(unittest_nr + i,
+ PDEV_OVERLAY),
+ !before ? "enabled" : "disabled");
+ return;
+ }
+ }
+
+ /* apply the overlays */
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status");
+
+ overlay_name = overlay_name_from_nr(overlay_nr + 0);
+
+ ret = overlay_data_apply(overlay_name, &ovcs_id);
+
+ if (!ret) {
+ unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
+ return;
+ }
+ save_ovcs_id[0] = ovcs_id;
+ of_unittest_track_overlay(ovcs_id, overlay_nr + 0);
+
+ EXPECT_END(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status");
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status");
+
+ overlay_name = overlay_name_from_nr(overlay_nr + 1);
+
+ ret = overlay_data_apply(overlay_name, &ovcs_id);
+
+ if (!ret) {
+ unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
+ return;
+ }
+ save_ovcs_id[1] = ovcs_id;
+ of_unittest_track_overlay(ovcs_id, overlay_nr + 1);
+
+ EXPECT_END(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status");
+
+
+ for (i = 0; i < 2; i++) {
+ /* unittest device must be in after state */
+ if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
+ != after) {
+ unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
+ overlay_name_from_nr(overlay_nr + i),
+ unittest_path(unittest_nr + i,
+ PDEV_OVERLAY),
+ !after ? "enabled" : "disabled");
+ return;
+ }
+ }
+
+ for (i = 1; i >= 0; i--) {
+ ovcs_id = save_ovcs_id[i];
+ if (of_overlay_remove(&ovcs_id)) {
+ unittest(0, "%s failed destroy @\"%s\"\n",
+ overlay_name_from_nr(overlay_nr + i),
+ unittest_path(unittest_nr + i,
+ PDEV_OVERLAY));
+ return;
+ }
+ of_unittest_untrack_overlay(save_ovcs_id[i]);
+ }
+
+ for (i = 0; i < 2; i++) {
+ /* unittest device must be again in before state */
+ if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
+ != before) {
+ unittest(0, "%s with device @\"%s\" %s\n",
+ overlay_name_from_nr(overlay_nr + i),
+ unittest_path(unittest_nr + i,
+ PDEV_OVERLAY),
+ !before ? "enabled" : "disabled");
+ return;
+ }
+ }
+
+ unittest(1, "overlay test %d passed\n", 6);
+
+}
+
+/* test overlay application in sequence */
+static void __init of_unittest_overlay_8(void)
+{
+ int i, save_ovcs_id[2], ovcs_id;
+ int overlay_nr = 8, unittest_nr = 8;
+ const char *overlay_name;
+ int ret;
+
+ /* we don't care about device state in this test */
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status");
+
+ overlay_name = overlay_name_from_nr(overlay_nr + 0);
+
+ ret = overlay_data_apply(overlay_name, &ovcs_id);
+ if (!ret)
+ unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
+
+ EXPECT_END(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status");
+
+ if (!ret)
+ return;
+
+ save_ovcs_id[0] = ovcs_id;
+ of_unittest_track_overlay(ovcs_id, overlay_nr + 0);
+
+ overlay_name = overlay_name_from_nr(overlay_nr + 1);
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo");
+
+ /* apply the overlays */
+ ret = overlay_data_apply(overlay_name, &ovcs_id);
+
+ EXPECT_END(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo");
+
+ if (!ret) {
+ unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
+ return;
+ }
+
+ save_ovcs_id[1] = ovcs_id;
+ of_unittest_track_overlay(ovcs_id, overlay_nr + 1);
+
+ /* now try to remove first overlay (it should fail) */
+ ovcs_id = save_ovcs_id[0];
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8");
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: overlay: overlay #6 is not topmost");
+
+ ret = of_overlay_remove(&ovcs_id);
+
+ EXPECT_END(KERN_INFO,
+ "OF: overlay: overlay #6 is not topmost");
+
+ EXPECT_END(KERN_INFO,
+ "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8");
+
+ if (!ret) {
+ /*
+ * Should never get here. If we do, expect a lot of
+ * subsequent tracking and overlay removal related errors.
+ */
+ unittest(0, "%s was destroyed @\"%s\"\n",
+ overlay_name_from_nr(overlay_nr + 0),
+ unittest_path(unittest_nr,
+ PDEV_OVERLAY));
+ return;
+ }
+
+ /* removing them in order should work */
+ for (i = 1; i >= 0; i--) {
+ ovcs_id = save_ovcs_id[i];
+ if (of_overlay_remove(&ovcs_id)) {
+ unittest(0, "%s not destroyed @\"%s\"\n",
+ overlay_name_from_nr(overlay_nr + i),
+ unittest_path(unittest_nr,
+ PDEV_OVERLAY));
+ return;
+ }
+ of_unittest_untrack_overlay(save_ovcs_id[i]);
+ }
+
+ unittest(1, "overlay test %d passed\n", 8);
+}
+
+/* test insertion of a bus with parent devices */
+static void __init of_unittest_overlay_10(void)
+{
+ int ret;
+ char *child_path;
+
+ /* device should disable */
+ ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
+
+ if (unittest(ret == 0,
+ "overlay test %d failed; overlay application\n", 10))
+ return;
+
+ child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
+ unittest_path(10, PDEV_OVERLAY));
+ if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
+ return;
+
+ ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
+ kfree(child_path);
+
+ unittest(ret, "overlay test %d failed; no child device\n", 10);
+}
+
+/* test insertion of a bus with parent devices (and revert) */
+static void __init of_unittest_overlay_11(void)
+{
+ int ret;
+
+ /* device should disable */
+ ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
+ PDEV_OVERLAY);
+
+ unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11);
+}
+
+#if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
+
+struct unittest_i2c_bus_data {
+ struct platform_device *pdev;
+ struct i2c_adapter adap;
+};
+
+static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
+ struct i2c_msg *msgs, int num)
+{
+ struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
+
+ (void)std;
+
+ return num;
+}
+
+static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
+{
+ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+static const struct i2c_algorithm unittest_i2c_algo = {
+ .master_xfer = unittest_i2c_master_xfer,
+ .functionality = unittest_i2c_functionality,
+};
+
+static int unittest_i2c_bus_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct unittest_i2c_bus_data *std;
+ struct i2c_adapter *adap;
+ int ret;
+
+ if (np == NULL) {
+ dev_err(dev, "No OF data for device\n");
+ return -EINVAL;
+
+ }
+
+ dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
+
+ std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
+ if (!std)
+ return -ENOMEM;
+
+ /* link them together */
+ std->pdev = pdev;
+ platform_set_drvdata(pdev, std);
+
+ adap = &std->adap;
+ i2c_set_adapdata(adap, std);
+ adap->nr = -1;
+ strscpy(adap->name, pdev->name, sizeof(adap->name));
+ adap->class = I2C_CLASS_DEPRECATED;
+ adap->algo = &unittest_i2c_algo;
+ adap->dev.parent = dev;
+ adap->dev.of_node = dev->of_node;
+ adap->timeout = 5 * HZ;
+ adap->retries = 3;
+
+ ret = i2c_add_numbered_adapter(adap);
+ if (ret != 0) {
+ dev_err(dev, "Failed to add I2C adapter\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static void unittest_i2c_bus_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
+
+ dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
+ i2c_del_adapter(&std->adap);
+}
+
+static const struct of_device_id unittest_i2c_bus_match[] = {
+ { .compatible = "unittest-i2c-bus", },
+ {},
+};
+
+static struct platform_driver unittest_i2c_bus_driver = {
+ .probe = unittest_i2c_bus_probe,
+ .remove_new = unittest_i2c_bus_remove,
+ .driver = {
+ .name = "unittest-i2c-bus",
+ .of_match_table = unittest_i2c_bus_match,
+ },
+};
+
+static int unittest_i2c_dev_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct device_node *np = client->dev.of_node;
+
+ if (!np) {
+ dev_err(dev, "No OF node\n");
+ return -EINVAL;
+ }
+
+ dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
+
+ return 0;
+};
+
+static void unittest_i2c_dev_remove(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct device_node *np = client->dev.of_node;
+
+ dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
+}
+
+static const struct i2c_device_id unittest_i2c_dev_id[] = {
+ { .name = "unittest-i2c-dev" },
+ { }
+};
+
+static struct i2c_driver unittest_i2c_dev_driver = {
+ .driver = {
+ .name = "unittest-i2c-dev",
+ },
+ .probe = unittest_i2c_dev_probe,
+ .remove = unittest_i2c_dev_remove,
+ .id_table = unittest_i2c_dev_id,
+};
+
+#if IS_BUILTIN(CONFIG_I2C_MUX)
+
+static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan)
+{
+ return 0;
+}
+
+static int unittest_i2c_mux_probe(struct i2c_client *client)
+{
+ int i, nchans;
+ struct device *dev = &client->dev;
+ struct i2c_adapter *adap = client->adapter;
+ struct device_node *np = client->dev.of_node, *child;
+ struct i2c_mux_core *muxc;
+ u32 reg, max_reg;
+
+ dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
+
+ if (!np) {
+ dev_err(dev, "No OF node\n");
+ return -EINVAL;
+ }
+
+ max_reg = (u32)-1;
+ for_each_child_of_node(np, child) {
+ if (of_property_read_u32(child, "reg", &reg))
+ continue;
+ if (max_reg == (u32)-1 || reg > max_reg)
+ max_reg = reg;
+ }
+ nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
+ if (nchans == 0) {
+ dev_err(dev, "No channels\n");
+ return -EINVAL;
+ }
+
+ muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0,
+ unittest_i2c_mux_select_chan, NULL);
+ if (!muxc)
+ return -ENOMEM;
+ for (i = 0; i < nchans; i++) {
+ if (i2c_mux_add_adapter(muxc, 0, i, 0)) {
+ dev_err(dev, "Failed to register mux #%d\n", i);
+ i2c_mux_del_adapters(muxc);
+ return -ENODEV;
+ }
+ }
+
+ i2c_set_clientdata(client, muxc);
+
+ return 0;
+};
+
+static void unittest_i2c_mux_remove(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct device_node *np = client->dev.of_node;
+ struct i2c_mux_core *muxc = i2c_get_clientdata(client);
+
+ dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
+ i2c_mux_del_adapters(muxc);
+}
+
+static const struct i2c_device_id unittest_i2c_mux_id[] = {
+ { .name = "unittest-i2c-mux" },
+ { }
+};
+
+static struct i2c_driver unittest_i2c_mux_driver = {
+ .driver = {
+ .name = "unittest-i2c-mux",
+ },
+ .probe = unittest_i2c_mux_probe,
+ .remove = unittest_i2c_mux_remove,
+ .id_table = unittest_i2c_mux_id,
+};
+
+#endif
+
+static int of_unittest_overlay_i2c_init(void)
+{
+ int ret;
+
+ ret = i2c_add_driver(&unittest_i2c_dev_driver);
+ if (unittest(ret == 0,
+ "could not register unittest i2c device driver\n"))
+ return ret;
+
+ ret = platform_driver_register(&unittest_i2c_bus_driver);
+
+ if (unittest(ret == 0,
+ "could not register unittest i2c bus driver\n"))
+ return ret;
+
+#if IS_BUILTIN(CONFIG_I2C_MUX)
+
+ EXPECT_BEGIN(KERN_INFO,
+ "i2c i2c-1: Added multiplexed i2c bus 2");
+
+ ret = i2c_add_driver(&unittest_i2c_mux_driver);
+
+ EXPECT_END(KERN_INFO,
+ "i2c i2c-1: Added multiplexed i2c bus 2");
+
+ if (unittest(ret == 0,
+ "could not register unittest i2c mux driver\n"))
+ return ret;
+#endif
+
+ return 0;
+}
+
+static void of_unittest_overlay_i2c_cleanup(void)
+{
+#if IS_BUILTIN(CONFIG_I2C_MUX)
+ i2c_del_driver(&unittest_i2c_mux_driver);
+#endif
+ platform_driver_unregister(&unittest_i2c_bus_driver);
+ i2c_del_driver(&unittest_i2c_dev_driver);
+}
+
+static void __init of_unittest_overlay_i2c_12(void)
+{
+ int ret;
+
+ /* device should enable */
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status");
+
+ ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
+
+ EXPECT_END(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status");
+
+ if (ret)
+ return;
+
+ unittest(1, "overlay test %d passed\n", 12);
+}
+
+/* test deactivation of device */
+static void __init of_unittest_overlay_i2c_13(void)
+{
+ int ret;
+
+ EXPECT_BEGIN(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status");
+
+ /* device should disable */
+ ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
+
+ EXPECT_END(KERN_INFO,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status");
+
+ if (ret)
+ return;
+
+ unittest(1, "overlay test %d passed\n", 13);
+}
+
+/* just check for i2c mux existence */
+static void of_unittest_overlay_i2c_14(void)
+{
+}
+
+static void __init of_unittest_overlay_i2c_15(void)
+{
+ int ret;
+
+ /* device should enable */
+ EXPECT_BEGIN(KERN_INFO,
+ "i2c i2c-1: Added multiplexed i2c bus 3");
+
+ ret = of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY);
+
+ EXPECT_END(KERN_INFO,
+ "i2c i2c-1: Added multiplexed i2c bus 3");
+
+ if (ret)
+ return;
+
+ unittest(1, "overlay test %d passed\n", 15);
+}
+
+#else
+
+static inline void of_unittest_overlay_i2c_14(void) { }
+static inline void of_unittest_overlay_i2c_15(void) { }
+
+#endif
+
+static int of_notify(struct notifier_block *nb, unsigned long action,
+ void *arg)
+{
+ struct of_overlay_notify_data *nd = arg;
+ struct device_node *found;
+ int ret;
+
+ /*
+ * For overlay_16 .. overlay_19, check that returning an error
+ * works for each of the actions by setting an arbitrary return
+ * error number that matches the test number. e.g. for unittest16,
+ * ret = -EBUSY which is -16.
+ *
+ * OVERLAY_INFO() for the overlays is declared to expect the same
+ * error number, so overlay_data_apply() will return no error.
+ *
+ * overlay_20 will return NOTIFY_DONE
+ */
+
+ ret = 0;
+ of_node_get(nd->overlay);
+
+ switch (action) {
+
+ case OF_OVERLAY_PRE_APPLY:
+ found = of_find_node_by_name(nd->overlay, "test-unittest16");
+ if (found) {
+ of_node_put(found);
+ ret = -EBUSY;
+ }
+ break;
+
+ case OF_OVERLAY_POST_APPLY:
+ found = of_find_node_by_name(nd->overlay, "test-unittest17");
+ if (found) {
+ of_node_put(found);
+ ret = -EEXIST;
+ }
+ break;
+
+ case OF_OVERLAY_PRE_REMOVE:
+ found = of_find_node_by_name(nd->overlay, "test-unittest18");
+ if (found) {
+ of_node_put(found);
+ ret = -EXDEV;
+ }
+ break;
+
+ case OF_OVERLAY_POST_REMOVE:
+ found = of_find_node_by_name(nd->overlay, "test-unittest19");
+ if (found) {
+ of_node_put(found);
+ ret = -ENODEV;
+ }
+ break;
+
+ default: /* should not happen */
+ of_node_put(nd->overlay);
+ ret = -EINVAL;
+ break;
+ }
+
+ if (ret)
+ return notifier_from_errno(ret);
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block of_nb = {
+ .notifier_call = of_notify,
+};
+
+static void __init of_unittest_overlay_notify(void)
+{
+ int ovcs_id;
+ int ret;
+
+ ret = of_overlay_notifier_register(&of_nb);
+ unittest(!ret,
+ "of_overlay_notifier_register() failed, ret = %d\n", ret);
+ if (ret)
+ return;
+
+ /*
+ * The overlays are applied by overlay_data_apply()
+ * instead of of_unittest_apply_overlay() so that they
+ * will not be tracked. Thus they will not be removed
+ * by of_unittest_remove_tracked_overlays().
+ *
+ * Applying overlays 16 - 19 will each trigger an error for a
+ * different action in of_notify().
+ *
+ * Applying overlay 20 will not trigger any error in of_notify().
+ */
+
+ /* --- overlay 16 --- */
+
+ EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus");
+
+ unittest(overlay_data_apply("overlay_16", &ovcs_id),
+ "test OF_OVERLAY_PRE_APPLY notify injected error\n");
+
+ EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus");
+
+ unittest(ovcs_id, "ovcs_id not created for overlay_16\n");
+
+ /* --- overlay 17 --- */
+
+ EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus");
+
+ unittest(overlay_data_apply("overlay_17", &ovcs_id),
+ "test OF_OVERLAY_POST_APPLY notify injected error\n");
+
+ EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus");
+
+ unittest(ovcs_id, "ovcs_id not created for overlay_17\n");
+
+ /* --- overlay 18 --- */
+
+ unittest(overlay_data_apply("overlay_18", &ovcs_id),
+ "OF_OVERLAY_PRE_REMOVE notify injected error\n");
+
+ unittest(ovcs_id, "ovcs_id not created for overlay_18\n");
+
+ if (ovcs_id) {
+ EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus");
+
+ ret = of_overlay_remove(&ovcs_id);
+ EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus");
+ if (ret == -EXDEV) {
+ /*
+ * change set ovcs_id should still exist
+ */
+ unittest(1, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE\n");
+ } else {
+ unittest(0, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE not returned\n");
+ }
+ } else {
+ unittest(1, "ovcs_id not created for overlay_18\n");
+ }
+
+ unittest(ovcs_id, "ovcs_id removed for overlay_18\n");
+
+ /* --- overlay 19 --- */
+
+ unittest(overlay_data_apply("overlay_19", &ovcs_id),
+ "OF_OVERLAY_POST_REMOVE notify injected error\n");
+
+ unittest(ovcs_id, "ovcs_id not created for overlay_19\n");
+
+ if (ovcs_id) {
+ EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus");
+ ret = of_overlay_remove(&ovcs_id);
+ EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus");
+ if (ret == -ENODEV)
+ unittest(1, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE\n");
+ else
+ unittest(0, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE not returned\n");
+ } else {
+ unittest(1, "ovcs_id removed for overlay_19\n");
+ }
+
+ unittest(!ovcs_id, "changeset ovcs_id = %d not removed for overlay_19\n",
+ ovcs_id);
+
+ /* --- overlay 20 --- */
+
+ unittest(overlay_data_apply("overlay_20", &ovcs_id),
+ "overlay notify no injected error\n");
+
+ if (ovcs_id) {
+ ret = of_overlay_remove(&ovcs_id);
+ if (ret)
+ unittest(1, "overlay_20 failed to be destroyed, ret = %d\n",
+ ret);
+ } else {
+ unittest(1, "ovcs_id not created for overlay_20\n");
+ }
+
+ unittest(!of_overlay_notifier_unregister(&of_nb),
+ "of_overlay_notifier_unregister() failed, ret = %d\n", ret);
+}
+
+static void __init of_unittest_overlay(void)
+{
+ struct device_node *bus_np = NULL;
+ unsigned int i;
+
+ if (platform_driver_register(&unittest_driver)) {
+ unittest(0, "could not register unittest driver\n");
+ goto out;
+ }
+
+ bus_np = of_find_node_by_path(bus_path);
+ if (bus_np == NULL) {
+ unittest(0, "could not find bus_path \"%s\"\n", bus_path);
+ goto out;
+ }
+
+ if (of_platform_default_populate(bus_np, NULL, NULL)) {
+ unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
+ goto out;
+ }
+
+ if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
+ unittest(0, "could not find unittest0 @ \"%s\"\n",
+ unittest_path(100, PDEV_OVERLAY));
+ goto out;
+ }
+
+ if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
+ unittest(0, "unittest1 @ \"%s\" should not exist\n",
+ unittest_path(101, PDEV_OVERLAY));
+ goto out;
+ }
+
+ unittest(1, "basic infrastructure of overlays passed");
+
+ /* tests in sequence */
+ of_unittest_overlay_0();
+ of_unittest_overlay_1();
+ of_unittest_overlay_2();
+ of_unittest_overlay_3();
+ of_unittest_overlay_4();
+ for (i = 0; i < 3; i++)
+ of_unittest_overlay_5();
+ of_unittest_overlay_6();
+ of_unittest_overlay_8();
+
+ of_unittest_overlay_10();
+ of_unittest_overlay_11();
+
+#if IS_BUILTIN(CONFIG_I2C)
+ if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
+ goto out;
+
+ of_unittest_overlay_i2c_12();
+ of_unittest_overlay_i2c_13();
+ of_unittest_overlay_i2c_14();
+ of_unittest_overlay_i2c_15();
+
+ of_unittest_overlay_i2c_cleanup();
+#endif
+
+ of_unittest_overlay_gpio();
+
+ of_unittest_remove_tracked_overlays();
+
+ of_unittest_overlay_notify();
+
+out:
+ of_node_put(bus_np);
+}
+
+#else
+static inline void __init of_unittest_overlay(void) { }
+#endif
+
+static void __init of_unittest_lifecycle(void)
+{
+#ifdef CONFIG_OF_DYNAMIC
+ unsigned int refcount;
+ int found_refcount_one = 0;
+ int put_count = 0;
+ struct device_node *np;
+ struct device_node *prev_sibling, *next_sibling;
+ const char *refcount_path = "/testcase-data/refcount-node";
+ const char *refcount_parent_path = "/testcase-data";
+
+ /*
+ * Node lifecycle tests, non-dynamic node:
+ *
+ * - Decrementing refcount to zero via of_node_put() should cause the
+ * attempt to free the node memory by of_node_release() to fail
+ * because the node is not a dynamic node.
+ *
+ * - Decrementing refcount past zero should result in additional
+ * errors reported.
+ */
+
+ np = of_find_node_by_path(refcount_path);
+ unittest(np, "find refcount_path \"%s\"\n", refcount_path);
+ if (np == NULL)
+ goto out_skip_tests;
+
+ while (!found_refcount_one) {
+
+ if (put_count++ > 10) {
+ unittest(0, "guardrail to avoid infinite loop\n");
+ goto out_skip_tests;
+ }
+
+ refcount = kref_read(&np->kobj.kref);
+ if (refcount == 1)
+ found_refcount_one = 1;
+ else
+ of_node_put(np);
+ }
+
+ EXPECT_BEGIN(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node");
+
+ /*
+ * refcount is now one, decrementing to zero will result in a call to
+ * of_node_release() to free the node's memory, which should result
+ * in an error
+ */
+ unittest(1, "/testcase-data/refcount-node is one");
+ of_node_put(np);
+
+ EXPECT_END(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node");
+
+
+ /*
+ * expect stack trace for subsequent of_node_put():
+ * __refcount_sub_and_test() calls:
+ * refcount_warn_saturate(r, REFCOUNT_SUB_UAF)
+ *
+ * Not capturing entire WARN_ONCE() trace with EXPECT_*(), just
+ * the first three lines, and the last line.
+ */
+ EXPECT_BEGIN(KERN_INFO, "------------[ cut here ]------------");
+ EXPECT_BEGIN(KERN_INFO, "WARNING: <<all>>");
+ EXPECT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free.");
+ EXPECT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---");
+
+ /* refcount is now zero, this should fail */
+ unittest(1, "/testcase-data/refcount-node is zero");
+ of_node_put(np);
+
+ EXPECT_END(KERN_INFO, "---[ end trace <<int>> ]---");
+ EXPECT_END(KERN_INFO, "refcount_t: underflow; use-after-free.");
+ EXPECT_END(KERN_INFO, "WARNING: <<all>>");
+ EXPECT_END(KERN_INFO, "------------[ cut here ]------------");
+
+ /*
+ * Q. do we expect to get yet another warning?
+ * A. no, the WARNING is from WARN_ONCE()
+ */
+ EXPECT_NOT_BEGIN(KERN_INFO, "------------[ cut here ]------------");
+ EXPECT_NOT_BEGIN(KERN_INFO, "WARNING: <<all>>");
+ EXPECT_NOT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free.");
+ EXPECT_NOT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---");
+
+ unittest(1, "/testcase-data/refcount-node is zero, second time");
+ of_node_put(np);
+
+ EXPECT_NOT_END(KERN_INFO, "---[ end trace <<int>> ]---");
+ EXPECT_NOT_END(KERN_INFO, "refcount_t: underflow; use-after-free.");
+ EXPECT_NOT_END(KERN_INFO, "WARNING: <<all>>");
+ EXPECT_NOT_END(KERN_INFO, "------------[ cut here ]------------");
+
+ /*
+ * refcount of zero will trigger stack traces from any further
+ * attempt to of_node_get() node "refcount-node". One example of
+ * this is where of_unittest_check_node_linkage() will recursively
+ * scan the tree, with 'for_each_child_of_node()' doing an
+ * of_node_get() of the children of a node.
+ *
+ * Prevent the stack trace by removing node "refcount-node" from
+ * its parent's child list.
+ *
+ * WARNING: EVIL, EVIL, EVIL:
+ *
+ * Directly manipulate the child list of node /testcase-data to
+ * remove child refcount-node. This is ignoring all proper methods
+ * of removing a child and will leak a small amount of memory.
+ */
+
+ np = of_find_node_by_path(refcount_parent_path);
+ unittest(np, "find refcount_parent_path \"%s\"\n", refcount_parent_path);
+ unittest(np, "ERROR: devicetree live tree left in a 'bad state' if test fail\n");
+ if (np == NULL)
+ return;
+
+ prev_sibling = np->child;
+ next_sibling = prev_sibling->sibling;
+ if (!strcmp(prev_sibling->full_name, "refcount-node")) {
+ np->child = next_sibling;
+ next_sibling = next_sibling->sibling;
+ }
+ while (next_sibling) {
+ if (!strcmp(next_sibling->full_name, "refcount-node"))
+ prev_sibling->sibling = next_sibling->sibling;
+ prev_sibling = next_sibling;
+ next_sibling = next_sibling->sibling;
+ }
+ of_node_put(np);
+
+ return;
+
+out_skip_tests:
+#endif
+ unittest(0, "One or more lifecycle tests skipped\n");
+}
+
+#ifdef CONFIG_OF_OVERLAY
+
+/*
+ * __dtbo_##overlay_name##_begin[] and __dtbo_##overlay_name##_end[] are
+ * created by cmd_dt_S_dtbo in scripts/Makefile.lib
+ */
+
+#define OVERLAY_INFO_EXTERN(overlay_name) \
+ extern uint8_t __dtbo_##overlay_name##_begin[]; \
+ extern uint8_t __dtbo_##overlay_name##_end[]
+
+#define OVERLAY_INFO(overlay_name, expected, expected_remove) \
+{ .dtbo_begin = __dtbo_##overlay_name##_begin, \
+ .dtbo_end = __dtbo_##overlay_name##_end, \
+ .expected_result = expected, \
+ .expected_result_remove = expected_remove, \
+ .name = #overlay_name, \
+}
+
+struct overlay_info {
+ uint8_t *dtbo_begin;
+ uint8_t *dtbo_end;
+ int expected_result;
+ int expected_result_remove; /* if apply failed */
+ int ovcs_id;
+ char *name;
+};
+
+OVERLAY_INFO_EXTERN(overlay_base);
+OVERLAY_INFO_EXTERN(overlay);
+OVERLAY_INFO_EXTERN(overlay_0);
+OVERLAY_INFO_EXTERN(overlay_1);
+OVERLAY_INFO_EXTERN(overlay_2);
+OVERLAY_INFO_EXTERN(overlay_3);
+OVERLAY_INFO_EXTERN(overlay_4);
+OVERLAY_INFO_EXTERN(overlay_5);
+OVERLAY_INFO_EXTERN(overlay_6);
+OVERLAY_INFO_EXTERN(overlay_7);
+OVERLAY_INFO_EXTERN(overlay_8);
+OVERLAY_INFO_EXTERN(overlay_9);
+OVERLAY_INFO_EXTERN(overlay_10);
+OVERLAY_INFO_EXTERN(overlay_11);
+OVERLAY_INFO_EXTERN(overlay_12);
+OVERLAY_INFO_EXTERN(overlay_13);
+OVERLAY_INFO_EXTERN(overlay_15);
+OVERLAY_INFO_EXTERN(overlay_16);
+OVERLAY_INFO_EXTERN(overlay_17);
+OVERLAY_INFO_EXTERN(overlay_18);
+OVERLAY_INFO_EXTERN(overlay_19);
+OVERLAY_INFO_EXTERN(overlay_20);
+OVERLAY_INFO_EXTERN(overlay_gpio_01);
+OVERLAY_INFO_EXTERN(overlay_gpio_02a);
+OVERLAY_INFO_EXTERN(overlay_gpio_02b);
+OVERLAY_INFO_EXTERN(overlay_gpio_03);
+OVERLAY_INFO_EXTERN(overlay_gpio_04a);
+OVERLAY_INFO_EXTERN(overlay_gpio_04b);
+OVERLAY_INFO_EXTERN(overlay_pci_node);
+OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node);
+OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop);
+OVERLAY_INFO_EXTERN(overlay_bad_phandle);
+OVERLAY_INFO_EXTERN(overlay_bad_symbol);
+OVERLAY_INFO_EXTERN(overlay_bad_unresolved);
+
+/* entries found by name */
+static struct overlay_info overlays[] = {
+ OVERLAY_INFO(overlay_base, -9999, 0),
+ OVERLAY_INFO(overlay, 0, 0),
+ OVERLAY_INFO(overlay_0, 0, 0),
+ OVERLAY_INFO(overlay_1, 0, 0),
+ OVERLAY_INFO(overlay_2, 0, 0),
+ OVERLAY_INFO(overlay_3, 0, 0),
+ OVERLAY_INFO(overlay_4, 0, 0),
+ OVERLAY_INFO(overlay_5, 0, 0),
+ OVERLAY_INFO(overlay_6, 0, 0),
+ OVERLAY_INFO(overlay_7, 0, 0),
+ OVERLAY_INFO(overlay_8, 0, 0),
+ OVERLAY_INFO(overlay_9, 0, 0),
+ OVERLAY_INFO(overlay_10, 0, 0),
+ OVERLAY_INFO(overlay_11, 0, 0),
+ OVERLAY_INFO(overlay_12, 0, 0),
+ OVERLAY_INFO(overlay_13, 0, 0),
+ OVERLAY_INFO(overlay_15, 0, 0),
+ OVERLAY_INFO(overlay_16, -EBUSY, 0),
+ OVERLAY_INFO(overlay_17, -EEXIST, 0),
+ OVERLAY_INFO(overlay_18, 0, 0),
+ OVERLAY_INFO(overlay_19, 0, 0),
+ OVERLAY_INFO(overlay_20, 0, 0),
+ OVERLAY_INFO(overlay_gpio_01, 0, 0),
+ OVERLAY_INFO(overlay_gpio_02a, 0, 0),
+ OVERLAY_INFO(overlay_gpio_02b, 0, 0),
+ OVERLAY_INFO(overlay_gpio_03, 0, 0),
+ OVERLAY_INFO(overlay_gpio_04a, 0, 0),
+ OVERLAY_INFO(overlay_gpio_04b, 0, 0),
+ OVERLAY_INFO(overlay_pci_node, 0, 0),
+ OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL, -ENODEV),
+ OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL, -ENODEV),
+ OVERLAY_INFO(overlay_bad_phandle, -EINVAL, 0),
+ OVERLAY_INFO(overlay_bad_symbol, -EINVAL, -ENODEV),
+ OVERLAY_INFO(overlay_bad_unresolved, -EINVAL, 0),
+ /* end marker */
+ { }
+};
+
+static struct device_node *overlay_base_root;
+
+static void * __init dt_alloc_memory(u64 size, u64 align)
+{
+ void *ptr = memblock_alloc(size, align);
+
+ if (!ptr)
+ panic("%s: Failed to allocate %llu bytes align=0x%llx\n",
+ __func__, size, align);
+
+ return ptr;
+}
+
+/*
+ * Create base device tree for the overlay unittest.
+ *
+ * This is called from very early boot code.
+ *
+ * Do as much as possible the same way as done in __unflatten_device_tree
+ * and other early boot steps for the normal FDT so that the overlay base
+ * unflattened tree will have the same characteristics as the real tree
+ * (such as having memory allocated by the early allocator). The goal
+ * is to test "the real thing" as much as possible, and test "test setup
+ * code" as little as possible.
+ *
+ * Have to stop before resolving phandles, because that uses kmalloc.
+ */
+void __init unittest_unflatten_overlay_base(void)
+{
+ struct overlay_info *info;
+ u32 data_size;
+ void *new_fdt;
+ u32 size;
+ int found = 0;
+ const char *overlay_name = "overlay_base";
+
+ for (info = overlays; info && info->name; info++) {
+ if (!strcmp(overlay_name, info->name)) {
+ found = 1;
+ break;
+ }
+ }
+ if (!found) {
+ pr_err("no overlay data for %s\n", overlay_name);
+ return;
+ }
+
+ info = &overlays[0];
+
+ if (info->expected_result != -9999) {
+ pr_err("No dtb 'overlay_base' to attach\n");
+ return;
+ }
+
+ data_size = info->dtbo_end - info->dtbo_begin;
+ if (!data_size) {
+ pr_err("No dtb 'overlay_base' to attach\n");
+ return;
+ }
+
+ size = fdt_totalsize(info->dtbo_begin);
+ if (size != data_size) {
+ pr_err("dtb 'overlay_base' header totalsize != actual size");
+ return;
+ }
+
+ new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE));
+ if (!new_fdt) {
+ pr_err("alloc for dtb 'overlay_base' failed");
+ return;
+ }
+
+ memcpy(new_fdt, info->dtbo_begin, size);
+
+ __unflatten_device_tree(new_fdt, NULL, &overlay_base_root,
+ dt_alloc_memory, true);
+}
+
+/*
+ * The purpose of of_unittest_overlay_data_add is to add an
+ * overlay in the normal fashion. This is a test of the whole
+ * picture, instead of testing individual elements.
+ *
+ * A secondary purpose is to be able to verify that the contents of
+ * /proc/device-tree/ contains the updated structure and values from
+ * the overlay. That must be verified separately in user space.
+ *
+ * Return 0 on unexpected error.
+ */
+static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id)
+{
+ struct overlay_info *info;
+ int passed = 1;
+ int found = 0;
+ int ret, ret2;
+ u32 size;
+
+ for (info = overlays; info && info->name; info++) {
+ if (!strcmp(overlay_name, info->name)) {
+ found = 1;
+ break;
+ }
+ }
+ if (!found) {
+ pr_err("no overlay data for %s\n", overlay_name);
+ return 0;
+ }
+
+ size = info->dtbo_end - info->dtbo_begin;
+ if (!size)
+ pr_err("no overlay data for %s\n", overlay_name);
+
+ ret = of_overlay_fdt_apply(info->dtbo_begin, size, &info->ovcs_id,
+ NULL);
+ if (ovcs_id)
+ *ovcs_id = info->ovcs_id;
+ if (ret < 0)
+ goto out;
+
+ pr_debug("%s applied\n", overlay_name);
+
+out:
+ if (ret != info->expected_result) {
+ pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n",
+ info->expected_result, ret, overlay_name);
+ passed = 0;
+ }
+
+ if (ret < 0) {
+ /* changeset may be partially applied */
+ ret2 = of_overlay_remove(&info->ovcs_id);
+ if (ret2 != info->expected_result_remove) {
+ pr_err("of_overlay_remove() expected %d, ret=%d, %s\n",
+ info->expected_result_remove, ret2,
+ overlay_name);
+ passed = 0;
+ }
+ }
+
+ return passed;
+}
+
+/*
+ * The purpose of of_unittest_overlay_high_level is to add an overlay
+ * in the normal fashion. This is a test of the whole picture,
+ * instead of individual elements.
+ *
+ * The first part of the function is _not_ normal overlay usage; it is
+ * finishing splicing the base overlay device tree into the live tree.
+ */
+static __init void of_unittest_overlay_high_level(void)
+{
+ struct device_node *last_sibling;
+ struct device_node *np;
+ struct device_node *of_symbols;
+ struct device_node *overlay_base_symbols;
+ struct device_node **pprev;
+ struct property *prop;
+ int ret;
+
+ if (!overlay_base_root) {
+ unittest(0, "overlay_base_root not initialized\n");
+ return;
+ }
+
+ /*
+ * Could not fixup phandles in unittest_unflatten_overlay_base()
+ * because kmalloc() was not yet available.
+ */
+ of_overlay_mutex_lock();
+ of_resolve_phandles(overlay_base_root);
+ of_overlay_mutex_unlock();
+
+
+ /*
+ * do not allow overlay_base to duplicate any node already in
+ * tree, this greatly simplifies the code
+ */
+
+ /*
+ * remove overlay_base_root node "__local_fixups", after
+ * being used by of_resolve_phandles()
+ */
+ pprev = &overlay_base_root->child;
+ for (np = overlay_base_root->child; np; np = np->sibling) {
+ if (of_node_name_eq(np, "__local_fixups__")) {
+ *pprev = np->sibling;
+ break;
+ }
+ pprev = &np->sibling;
+ }
+
+ /* remove overlay_base_root node "__symbols__" if in live tree */
+ of_symbols = of_get_child_by_name(of_root, "__symbols__");
+ if (of_symbols) {
+ /* will have to graft properties from node into live tree */
+ pprev = &overlay_base_root->child;
+ for (np = overlay_base_root->child; np; np = np->sibling) {
+ if (of_node_name_eq(np, "__symbols__")) {
+ overlay_base_symbols = np;
+ *pprev = np->sibling;
+ break;
+ }
+ pprev = &np->sibling;
+ }
+ }
+
+ for_each_child_of_node(overlay_base_root, np) {
+ struct device_node *base_child;
+ for_each_child_of_node(of_root, base_child) {
+ if (!strcmp(np->full_name, base_child->full_name)) {
+ unittest(0, "illegal node name in overlay_base %pOFn",
+ np);
+ of_node_put(np);
+ of_node_put(base_child);
+ return;
+ }
+ }
+ }
+
+ /*
+ * overlay 'overlay_base' is not allowed to have root
+ * properties, so only need to splice nodes into main device tree.
+ *
+ * root node of *overlay_base_root will not be freed, it is lost
+ * memory.
+ */
+
+ for (np = overlay_base_root->child; np; np = np->sibling)
+ np->parent = of_root;
+
+ mutex_lock(&of_mutex);
+
+ for (last_sibling = np = of_root->child; np; np = np->sibling)
+ last_sibling = np;
+
+ if (last_sibling)
+ last_sibling->sibling = overlay_base_root->child;
+ else
+ of_root->child = overlay_base_root->child;
+
+ for_each_of_allnodes_from(overlay_base_root, np)
+ __of_attach_node_sysfs(np);
+
+ if (of_symbols) {
+ struct property *new_prop;
+ for_each_property_of_node(overlay_base_symbols, prop) {
+
+ new_prop = __of_prop_dup(prop, GFP_KERNEL);
+ if (!new_prop) {
+ unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__",
+ prop->name);
+ goto err_unlock;
+ }
+ if (__of_add_property(of_symbols, new_prop)) {
+ kfree(new_prop->name);
+ kfree(new_prop->value);
+ kfree(new_prop);
+ /* "name" auto-generated by unflatten */
+ if (!strcmp(prop->name, "name"))
+ continue;
+ unittest(0, "duplicate property '%s' in overlay_base node __symbols__",
+ prop->name);
+ goto err_unlock;
+ }
+ if (__of_add_property_sysfs(of_symbols, new_prop)) {
+ unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs",
+ prop->name);
+ goto err_unlock;
+ }
+ }
+ }
+
+ mutex_unlock(&of_mutex);
+
+
+ /* now do the normal overlay usage test */
+
+ /* --- overlay --- */
+
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right");
+
+ ret = overlay_data_apply("overlay", NULL);
+
+ EXPECT_END(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right");
+ EXPECT_END(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left");
+ EXPECT_END(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200");
+ EXPECT_END(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2");
+ EXPECT_END(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate");
+ EXPECT_END(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color");
+ EXPECT_END(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status");
+ EXPECT_END(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up");
+ EXPECT_END(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up");
+ EXPECT_END(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status");
+ EXPECT_END(KERN_ERR,
+ "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status");
+
+ unittest(ret, "Adding overlay 'overlay' failed\n");
+
+ /* --- overlay_bad_add_dup_node --- */
+
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/motor-1/controller:name");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: Error reverting changeset (-19)");
+
+ unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL),
+ "Adding overlay 'overlay_bad_add_dup_node' failed\n");
+
+ EXPECT_END(KERN_ERR,
+ "OF: Error reverting changeset (-19)");
+ EXPECT_END(KERN_ERR,
+ "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/motor-1/controller:name");
+ EXPECT_END(KERN_ERR,
+ "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name");
+ EXPECT_END(KERN_ERR,
+ "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller");
+
+ /* --- overlay_bad_add_dup_prop --- */
+
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/motor-1/electric:name");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: Error reverting changeset (-19)");
+
+ unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL),
+ "Adding overlay 'overlay_bad_add_dup_prop' failed\n");
+
+ EXPECT_END(KERN_ERR,
+ "OF: Error reverting changeset (-19)");
+ EXPECT_END(KERN_ERR,
+ "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/motor-1/electric:name");
+ EXPECT_END(KERN_ERR,
+ "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name");
+ EXPECT_END(KERN_ERR,
+ "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail");
+ EXPECT_END(KERN_ERR,
+ "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric");
+
+ /* --- overlay_bad_phandle --- */
+
+ unittest(overlay_data_apply("overlay_bad_phandle", NULL),
+ "Adding overlay 'overlay_bad_phandle' failed\n");
+
+ /* --- overlay_bad_symbol --- */
+
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/hvac-medium-2:name");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: Error reverting changeset (-19)");
+
+ unittest(overlay_data_apply("overlay_bad_symbol", NULL),
+ "Adding overlay 'overlay_bad_symbol' failed\n");
+
+ EXPECT_END(KERN_ERR,
+ "OF: Error reverting changeset (-19)");
+ EXPECT_END(KERN_ERR,
+ "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/hvac-medium-2:name");
+
+ /* --- overlay_bad_unresolved --- */
+
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: resolver: node label 'this_label_does_not_exist' not found in live devicetree symbols table");
+ EXPECT_BEGIN(KERN_ERR,
+ "OF: resolver: overlay phandle fixup failed: -22");
+
+ unittest(overlay_data_apply("overlay_bad_unresolved", NULL),
+ "Adding overlay 'overlay_bad_unresolved' failed\n");
+
+ EXPECT_END(KERN_ERR,
+ "OF: resolver: overlay phandle fixup failed: -22");
+ EXPECT_END(KERN_ERR,
+ "OF: resolver: node label 'this_label_does_not_exist' not found in live devicetree symbols table");
+
+ return;
+
+err_unlock:
+ mutex_unlock(&of_mutex);
+}
+
+static int of_unittest_pci_dev_num;
+static int of_unittest_pci_child_num;
+
+/*
+ * PCI device tree node test driver
+ */
+static const struct pci_device_id testdrv_pci_ids[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_REDHAT, 0x5), }, /* PCI_VENDOR_ID_REDHAT */
+ { 0, }
+};
+
+static int testdrv_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ struct overlay_info *info;
+ struct device_node *dn;
+ int ret, ovcs_id;
+ u32 size;
+
+ dn = pdev->dev.of_node;
+ if (!dn) {
+ dev_err(&pdev->dev, "does not find bus endpoint");
+ return -EINVAL;
+ }
+
+ for (info = overlays; info && info->name; info++) {
+ if (!strcmp(info->name, "overlay_pci_node"))
+ break;
+ }
+ if (!info || !info->name) {
+ dev_err(&pdev->dev, "no overlay data for overlay_pci_node");
+ return -ENODEV;
+ }
+
+ size = info->dtbo_end - info->dtbo_begin;
+ ret = of_overlay_fdt_apply(info->dtbo_begin, size, &ovcs_id, dn);
+ of_node_put(dn);
+ if (ret)
+ return ret;
+
+ of_platform_default_populate(dn, NULL, &pdev->dev);
+ pci_set_drvdata(pdev, (void *)(uintptr_t)ovcs_id);
+
+ return 0;
+}
+
+static void testdrv_remove(struct pci_dev *pdev)
+{
+ int ovcs_id = (int)(uintptr_t)pci_get_drvdata(pdev);
+
+ of_platform_depopulate(&pdev->dev);
+ of_overlay_remove(&ovcs_id);
+}
+
+static struct pci_driver testdrv_driver = {
+ .name = "pci_dt_testdrv",
+ .id_table = testdrv_pci_ids,
+ .probe = testdrv_probe,
+ .remove = testdrv_remove,
+};
+
+static int unittest_pci_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct device *dev;
+ u64 exp_addr;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+
+ dev = &pdev->dev;
+ while (dev && !dev_is_pci(dev))
+ dev = dev->parent;
+ if (!dev) {
+ pr_err("unable to find parent device\n");
+ return -ENODEV;
+ }
+
+ exp_addr = pci_resource_start(to_pci_dev(dev), 0) + 0x100;
+ unittest(res->start == exp_addr, "Incorrect translated address %llx, expected %llx\n",
+ (u64)res->start, exp_addr);
+
+ of_unittest_pci_child_num++;
+
+ return 0;
+}
+
+static const struct of_device_id unittest_pci_of_match[] = {
+ { .compatible = "unittest-pci" },
+ { }
+};
+
+static struct platform_driver unittest_pci_driver = {
+ .probe = unittest_pci_probe,
+ .driver = {
+ .name = "unittest-pci",
+ .of_match_table = unittest_pci_of_match,
+ },
+};
+
+static int of_unittest_pci_node_verify(struct pci_dev *pdev, bool add)
+{
+ struct device_node *pnp, *np = NULL;
+ struct device *child_dev;
+ char *path = NULL;
+ const __be32 *reg;
+ int rc = 0;
+
+ pnp = pdev->dev.of_node;
+ unittest(pnp, "Failed creating PCI dt node\n");
+ if (!pnp)
+ return -ENODEV;
+
+ if (add) {
+ path = kasprintf(GFP_KERNEL, "%pOF/pci-ep-bus@0/unittest-pci@100", pnp);
+ np = of_find_node_by_path(path);
+ unittest(np, "Failed to get unittest-pci node under PCI node\n");
+ if (!np) {
+ rc = -ENODEV;
+ goto failed;
+ }
+
+ reg = of_get_property(np, "reg", NULL);
+ unittest(reg, "Failed to get reg property\n");
+ if (!reg)
+ rc = -ENODEV;
+ } else {
+ path = kasprintf(GFP_KERNEL, "%pOF/pci-ep-bus@0", pnp);
+ np = of_find_node_by_path(path);
+ unittest(!np, "Child device tree node is not removed\n");
+ child_dev = device_find_any_child(&pdev->dev);
+ unittest(!child_dev, "Child device is not removed\n");
+ }
+
+failed:
+ kfree(path);
+ if (np)
+ of_node_put(np);
+
+ return rc;
+}
+
+static void __init of_unittest_pci_node(void)
+{
+ struct pci_dev *pdev = NULL;
+ int rc;
+
+ if (!IS_ENABLED(CONFIG_PCI_DYNAMIC_OF_NODES))
+ return;
+
+ rc = pci_register_driver(&testdrv_driver);
+ unittest(!rc, "Failed to register pci test driver; rc = %d\n", rc);
+ if (rc)
+ return;
+
+ rc = platform_driver_register(&unittest_pci_driver);
+ if (unittest(!rc, "Failed to register unittest pci driver\n")) {
+ pci_unregister_driver(&testdrv_driver);
+ return;
+ }
+
+ while ((pdev = pci_get_device(PCI_VENDOR_ID_REDHAT, 0x5, pdev)) != NULL) {
+ of_unittest_pci_node_verify(pdev, true);
+ of_unittest_pci_dev_num++;
+ }
+ if (pdev)
+ pci_dev_put(pdev);
+
+ unittest(of_unittest_pci_dev_num,
+ "No test PCI device been found. Please run QEMU with '-device pci-testdev'\n");
+ unittest(of_unittest_pci_dev_num == of_unittest_pci_child_num,
+ "Child device number %d is not expected %d", of_unittest_pci_child_num,
+ of_unittest_pci_dev_num);
+
+ platform_driver_unregister(&unittest_pci_driver);
+ pci_unregister_driver(&testdrv_driver);
+
+ while ((pdev = pci_get_device(PCI_VENDOR_ID_REDHAT, 0x5, pdev)) != NULL)
+ of_unittest_pci_node_verify(pdev, false);
+ if (pdev)
+ pci_dev_put(pdev);
+}
+#else
+
+static inline __init void of_unittest_overlay_high_level(void) {}
+static inline __init void of_unittest_pci_node(void) { }
+
+#endif
+
+static int __init of_unittest(void)
+{
+ struct device_node *np;
+ int res;
+
+ pr_info("start of unittest - you will see error messages\n");
+
+ /* Taint the kernel so we know we've run tests. */
+ add_taint(TAINT_TEST, LOCKDEP_STILL_OK);
+
+ /* adding data for unittest */
+
+ if (IS_ENABLED(CONFIG_UML))
+ unittest_unflatten_overlay_base();
+
+ res = unittest_data_add();
+ if (res)
+ return res;
+ if (!of_aliases)
+ of_aliases = of_find_node_by_path("/aliases");
+
+ np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
+ if (!np) {
+ pr_info("No testcase data in device tree; not running tests\n");
+ return 0;
+ }
+ of_node_put(np);
+
+ of_unittest_check_tree_linkage();
+ of_unittest_check_phandles();
+ of_unittest_find_node_by_name();
+ of_unittest_dynamic();
+ of_unittest_parse_phandle_with_args();
+ of_unittest_parse_phandle_with_args_map();
+ of_unittest_printf();
+ of_unittest_property_string();
+ of_unittest_property_copy();
+ of_unittest_changeset();
+ of_unittest_parse_interrupts();
+ of_unittest_parse_interrupts_extended();
+ of_unittest_dma_get_max_cpu_address();
+ of_unittest_parse_dma_ranges();
+ of_unittest_pci_dma_ranges();
+ of_unittest_bus_ranges();
+ of_unittest_bus_3cell_ranges();
+ of_unittest_reg();
+ of_unittest_match_node();
+ of_unittest_platform_populate();
+ of_unittest_overlay();
+ of_unittest_lifecycle();
+ of_unittest_pci_node();
+
+ /* Double check linkage after removing testcase data */
+ of_unittest_check_tree_linkage();
+
+ of_unittest_overlay_high_level();
+
+ pr_info("end of unittest - %i passed, %i failed\n",
+ unittest_results.passed, unittest_results.failed);
+
+ return 0;
+}
+late_initcall(of_unittest);