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linux-next/drivers/of/unittest.c
Greg Kroah-Hartman b24413180f License cleanup: add SPDX GPL-2.0 license identifier to files with no license 
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.

By default all files without license information are under the default
license of the kernel, which is GPL version 2.

Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier.  The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.

How this work was done:

Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
 - file had no licensing information it it.
 - file was a */uapi/* one with no licensing information in it,
 - file was a */uapi/* one with existing licensing information,

Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.

The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne.  Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.

The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed.  Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.

Criteria used to select files for SPDX license identifier tagging was:
 - Files considered eligible had to be source code files.
 - Make and config files were included as candidates if they contained >5
   lines of source
 - File already had some variant of a license header in it (even if <5
   lines).

All documentation files were explicitly excluded.

The following heuristics were used to determine which SPDX license
identifiers to apply.

 - when both scanners couldn't find any license traces, file was
   considered to have no license information in it, and the top level
   COPYING file license applied.

   For non */uapi/* files that summary was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0                                              11139

   and resulted in the first patch in this series.

   If that file was a */uapi/* path one, it was "GPL-2.0 WITH
   Linux-syscall-note" otherwise it was "GPL-2.0".  Results of that was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0 WITH Linux-syscall-note                        930

   and resulted in the second patch in this series.

 - if a file had some form of licensing information in it, and was one
   of the */uapi/* ones, it was denoted with the Linux-syscall-note if
   any GPL family license was found in the file or had no licensing in
   it (per prior point).  Results summary:

   SPDX license identifier                            # files
   ---------------------------------------------------|------
   GPL-2.0 WITH Linux-syscall-note                       270
   GPL-2.0+ WITH Linux-syscall-note                      169
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause)    21
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)    17
   LGPL-2.1+ WITH Linux-syscall-note                      15
   GPL-1.0+ WITH Linux-syscall-note                       14
   ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause)    5
   LGPL-2.0+ WITH Linux-syscall-note                       4
   LGPL-2.1 WITH Linux-syscall-note                        3
   ((GPL-2.0 WITH Linux-syscall-note) OR MIT)              3
   ((GPL-2.0 WITH Linux-syscall-note) AND MIT)             1

   and that resulted in the third patch in this series.

 - when the two scanners agreed on the detected license(s), that became
   the concluded license(s).

 - when there was disagreement between the two scanners (one detected a
   license but the other didn't, or they both detected different
   licenses) a manual inspection of the file occurred.

 - In most cases a manual inspection of the information in the file
   resulted in a clear resolution of the license that should apply (and
   which scanner probably needed to revisit its heuristics).

 - When it was not immediately clear, the license identifier was
   confirmed with lawyers working with the Linux Foundation.

 - If there was any question as to the appropriate license identifier,
   the file was flagged for further research and to be revisited later
   in time.

In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.

Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights.  The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.

Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.

In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.

Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
 - a full scancode scan run, collecting the matched texts, detected
   license ids and scores
 - reviewing anything where there was a license detected (about 500+
   files) to ensure that the applied SPDX license was correct
 - reviewing anything where there was no detection but the patch license
   was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
   SPDX license was correct

This produced a worksheet with 20 files needing minor correction.  This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.

These .csv files were then reviewed by Greg.  Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected.  This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.)  Finally Greg ran the script using the .csv files to
generate the patches.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-02 11:10:55 +01:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Self tests for device tree subsystem
*/
#define pr_fmt(fmt) "### dt-test ### " fmt
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/hashtable.h>
#include <linux/libfdt.h>
#include <linux/of.h>
#include <linux/of_fdt.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/i2c-mux.h>
#include <linux/bitops.h>
#include "of_private.h"
static struct unittest_results {
int passed;
int failed;
} unittest_results;
#define unittest(result, fmt, ...) ({ \
bool failed = !(result); \
if (failed) { \
unittest_results.failed++; \
pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
} else { \
unittest_results.passed++; \
pr_debug("pass %s():%i\n", __func__, __LINE__); \
} \
failed; \
})
static void __init of_unittest_find_node_by_name(void)
{
struct device_node *np;
const char *options, *name;
np = of_find_node_by_path("/testcase-data");
name = kasprintf(GFP_KERNEL, "%pOF", np);
unittest(np && !strcmp("/testcase-data", name),
"find /testcase-data failed\n");
of_node_put(np);
kfree(name);
/* Test if trailing '/' works */
np = of_find_node_by_path("/testcase-data/");
unittest(!np, "trailing '/' on /testcase-data/ should fail\n");
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
name = kasprintf(GFP_KERNEL, "%pOF", np);
unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
"find /testcase-data/phandle-tests/consumer-a failed\n");
of_node_put(np);
kfree(name);
np = of_find_node_by_path("testcase-alias");
name = kasprintf(GFP_KERNEL, "%pOF", np);
unittest(np && !strcmp("/testcase-data", name),
"find testcase-alias failed\n");
of_node_put(np);
kfree(name);
/* Test if trailing '/' works on aliases */
np = of_find_node_by_path("testcase-alias/");
unittest(!np, "trailing '/' on testcase-alias/ should fail\n");
np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
name = kasprintf(GFP_KERNEL, "%pOF", np);
unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
"find testcase-alias/phandle-tests/consumer-a failed\n");
of_node_put(np);
kfree(name);
np = of_find_node_by_path("/testcase-data/missing-path");
unittest(!np, "non-existent path returned node %pOF\n", np);
of_node_put(np);
np = of_find_node_by_path("missing-alias");
unittest(!np, "non-existent alias returned node %pOF\n", np);
of_node_put(np);
np = of_find_node_by_path("testcase-alias/missing-path");
unittest(!np, "non-existent alias with relative path returned node %pOF\n", np);
of_node_put(np);
np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
unittest(np && !strcmp("testoption", options),
"option path test failed\n");
of_node_put(np);
np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
unittest(np && !strcmp("test/option", options),
"option path test, subcase #1 failed\n");
of_node_put(np);
np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options);
unittest(np && !strcmp("test/option", options),
"option path test, subcase #2 failed\n");
of_node_put(np);
np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
unittest(np, "NULL option path test failed\n");
of_node_put(np);
np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
&options);
unittest(np && !strcmp("testaliasoption", options),
"option alias path test failed\n");
of_node_put(np);
np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
&options);
unittest(np && !strcmp("test/alias/option", options),
"option alias path test, subcase #1 failed\n");
of_node_put(np);
np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
unittest(np, "NULL option alias path test failed\n");
of_node_put(np);
options = "testoption";
np = of_find_node_opts_by_path("testcase-alias", &options);
unittest(np && !options, "option clearing test failed\n");
of_node_put(np);
options = "testoption";
np = of_find_node_opts_by_path("/", &options);
unittest(np && !options, "option clearing root node test failed\n");
of_node_put(np);
}
static void __init of_unittest_dynamic(void)
{
struct device_node *np;
struct property *prop;
np = of_find_node_by_path("/testcase-data");
if (!np) {
pr_err("missing testcase data\n");
return;
}
/* Array of 4 properties for the purpose of testing */
prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
if (!prop) {
unittest(0, "kzalloc() failed\n");
return;
}
/* Add a new property - should pass*/
prop->name = "new-property";
prop->value = "new-property-data";
prop->length = strlen(prop->value);
unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
/* Try to add an existing property - should fail */
prop++;
prop->name = "new-property";
prop->value = "new-property-data-should-fail";
prop->length = strlen(prop->value);
unittest(of_add_property(np, prop) != 0,
"Adding an existing property should have failed\n");
/* Try to modify an existing property - should pass */
prop->value = "modify-property-data-should-pass";
prop->length = strlen(prop->value);
unittest(of_update_property(np, prop) == 0,
"Updating an existing property should have passed\n");
/* Try to modify non-existent property - should pass*/
prop++;
prop->name = "modify-property";
prop->value = "modify-missing-property-data-should-pass";
prop->length = strlen(prop->value);
unittest(of_update_property(np, prop) == 0,
"Updating a missing property should have passed\n");
/* Remove property - should pass */
unittest(of_remove_property(np, prop) == 0,
"Removing a property should have passed\n");
/* Adding very large property - should pass */
prop++;
prop->name = "large-property-PAGE_SIZEx8";
prop->length = PAGE_SIZE * 8;
prop->value = kzalloc(prop->length, GFP_KERNEL);
unittest(prop->value != NULL, "Unable to allocate large buffer\n");
if (prop->value)
unittest(of_add_property(np, prop) == 0,
"Adding a large property should have passed\n");
}
static int __init of_unittest_check_node_linkage(struct device_node *np)
{
struct device_node *child;
int count = 0, rc;
for_each_child_of_node(np, child) {
if (child->parent != np) {
pr_err("Child node %s links to wrong parent %s\n",
child->name, np->name);
rc = -EINVAL;
goto put_child;
}
rc = of_unittest_check_node_linkage(child);
if (rc < 0)
goto put_child;
count += rc;
}
return count + 1;
put_child:
of_node_put(child);
return rc;
}
static void __init of_unittest_check_tree_linkage(void)
{
struct device_node *np;
int allnode_count = 0, child_count;
if (!of_root)
return;
for_each_of_allnodes(np)
allnode_count++;
child_count = of_unittest_check_node_linkage(of_root);
unittest(child_count > 0, "Device node data structure is corrupted\n");
unittest(child_count == allnode_count,
"allnodes list size (%i) doesn't match sibling lists size (%i)\n",
allnode_count, child_count);
pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
}
static void __init of_unittest_printf_one(struct device_node *np, const char *fmt,
const char *expected)
{
unsigned char buf[strlen(expected)+10];
int size, i;
/* Baseline; check conversion with a large size limit */
memset(buf, 0xff, sizeof(buf));
size = snprintf(buf, sizeof(buf) - 2, fmt, np);
/* use strcmp() instead of strncmp() here to be absolutely sure strings match */
unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff),
"sprintf failed; fmt='%s' expected='%s' rslt='%s'\n",
fmt, expected, buf);
/* Make sure length limits work */
size++;
for (i = 0; i < 2; i++, size--) {
/* Clear the buffer, and make sure it works correctly still */
memset(buf, 0xff, sizeof(buf));
snprintf(buf, size+1, fmt, np);
unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 0xff),
"snprintf failed; size=%i fmt='%s' expected='%s' rslt='%s'\n",
size, fmt, expected, buf);
}
}
static void __init of_unittest_printf(void)
{
struct device_node *np;
const char *full_name = "/testcase-data/platform-tests/test-device@1/dev@100";
char phandle_str[16] = "";
np = of_find_node_by_path(full_name);
if (!np) {
unittest(np, "testcase data missing\n");
return;
}
num_to_str(phandle_str, sizeof(phandle_str), np->phandle);
of_unittest_printf_one(np, "%pOF", full_name);
of_unittest_printf_one(np, "%pOFf", full_name);
of_unittest_printf_one(np, "%pOFp", phandle_str);
of_unittest_printf_one(np, "%pOFP", "dev@100");
of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC");
of_unittest_printf_one(np, "%10pOFP", " dev@100");
of_unittest_printf_one(np, "%-10pOFP", "dev@100 ");
of_unittest_printf_one(of_root, "%pOFP", "/");
of_unittest_printf_one(np, "%pOFF", "----");
of_unittest_printf_one(np, "%pOFPF", "dev@100:----");
of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device");
of_unittest_printf_one(np, "%pOFc", "test-sub-device");
of_unittest_printf_one(np, "%pOFC",
"\"test-sub-device\",\"test-compat2\",\"test-compat3\"");
}
struct node_hash {
struct hlist_node node;
struct device_node *np;
};
static DEFINE_HASHTABLE(phandle_ht, 8);
static void __init of_unittest_check_phandles(void)
{
struct device_node *np;
struct node_hash *nh;
struct hlist_node *tmp;
int i, dup_count = 0, phandle_count = 0;
for_each_of_allnodes(np) {
if (!np->phandle)
continue;
hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
if (nh->np->phandle == np->phandle) {
pr_info("Duplicate phandle! %i used by %pOF and %pOF\n",
np->phandle, nh->np, np);
dup_count++;
break;
}
}
nh = kzalloc(sizeof(*nh), GFP_KERNEL);
if (WARN_ON(!nh))
return;
nh->np = np;
hash_add(phandle_ht, &nh->node, np->phandle);
phandle_count++;
}
unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
dup_count, phandle_count);
/* Clean up */
hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
hash_del(&nh->node);
kfree(nh);
}
}
static void __init of_unittest_parse_phandle_with_args(void)
{
struct device_node *np;
struct of_phandle_args args;
int i, rc;
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
if (!np) {
pr_err("missing testcase data\n");
return;
}
rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
for (i = 0; i < 8; i++) {
bool passed = true;
rc = of_parse_phandle_with_args(np, "phandle-list",
"#phandle-cells", i, &args);
/* Test the values from tests-phandle.dtsi */
switch (i) {
case 0:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == (i + 1));
break;
case 1:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == (i + 1));
passed &= (args.args[1] == 0);
break;
case 2:
passed &= (rc == -ENOENT);
break;
case 3:
passed &= !rc;
passed &= (args.args_count == 3);
passed &= (args.args[0] == (i + 1));
passed &= (args.args[1] == 4);
passed &= (args.args[2] == 3);
break;
case 4:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == (i + 1));
passed &= (args.args[1] == 100);
break;
case 5:
passed &= !rc;
passed &= (args.args_count == 0);
break;
case 6:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == (i + 1));
break;
case 7:
passed &= (rc == -ENOENT);
break;
default:
passed = false;
}
unittest(passed, "index %i - data error on node %pOF rc=%i\n",
i, args.np, rc);
}
/* Check for missing list property */
rc = of_parse_phandle_with_args(np, "phandle-list-missing",
"#phandle-cells", 0, &args);
unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
rc = of_count_phandle_with_args(np, "phandle-list-missing",
"#phandle-cells");
unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
/* Check for missing cells property */
rc = of_parse_phandle_with_args(np, "phandle-list",
"#phandle-cells-missing", 0, &args);
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
rc = of_count_phandle_with_args(np, "phandle-list",
"#phandle-cells-missing");
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
/* Check for bad phandle in list */
rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
"#phandle-cells", 0, &args);
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
"#phandle-cells");
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
/* Check for incorrectly formed argument list */
rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
"#phandle-cells", 1, &args);
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
"#phandle-cells");
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
}
static void __init of_unittest_property_string(void)
{
const char *strings[4];
struct device_node *np;
int rc;
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
if (!np) {
pr_err("No testcase data in device tree\n");
return;
}
rc = of_property_match_string(np, "phandle-list-names", "first");
unittest(rc == 0, "first expected:0 got:%i\n", rc);
rc = of_property_match_string(np, "phandle-list-names", "second");
unittest(rc == 1, "second expected:1 got:%i\n", rc);
rc = of_property_match_string(np, "phandle-list-names", "third");
unittest(rc == 2, "third expected:2 got:%i\n", rc);
rc = of_property_match_string(np, "phandle-list-names", "fourth");
unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
rc = of_property_match_string(np, "missing-property", "blah");
unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
rc = of_property_match_string(np, "empty-property", "blah");
unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
rc = of_property_match_string(np, "unterminated-string", "blah");
unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
/* of_property_count_strings() tests */
rc = of_property_count_strings(np, "string-property");
unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
rc = of_property_count_strings(np, "phandle-list-names");
unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
rc = of_property_count_strings(np, "unterminated-string");
unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
rc = of_property_count_strings(np, "unterminated-string-list");
unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
/* of_property_read_string_index() tests */
rc = of_property_read_string_index(np, "string-property", 0, strings);
unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
strings[0] = NULL;
rc = of_property_read_string_index(np, "string-property", 1, strings);
unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
strings[0] = NULL;
rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
strings[0] = NULL;
rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
strings[0] = NULL;
rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
strings[1] = NULL;
/* of_property_read_string_array() tests */
rc = of_property_read_string_array(np, "string-property", strings, 4);
unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
/* -- An incorrectly formed string should cause a failure */
rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
/* -- parsing the correctly formed strings should still work: */
strings[2] = NULL;
rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
strings[1] = NULL;
rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
}
#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
(p1)->value && (p2)->value && \
!memcmp((p1)->value, (p2)->value, (p1)->length) && \
!strcmp((p1)->name, (p2)->name))
static void __init of_unittest_property_copy(void)
{
#ifdef CONFIG_OF_DYNAMIC
struct property p1 = { .name = "p1", .length = 0, .value = "" };
struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
struct property *new;
new = __of_prop_dup(&p1, GFP_KERNEL);
unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
kfree(new->value);
kfree(new->name);
kfree(new);
new = __of_prop_dup(&p2, GFP_KERNEL);
unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
kfree(new->value);
kfree(new->name);
kfree(new);
#endif
}
static void __init of_unittest_changeset(void)
{
#ifdef CONFIG_OF_DYNAMIC
struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
struct property *ppremove;
struct device_node *n1, *n2, *n21, *nremove, *parent, *np;
struct of_changeset chgset;
n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1");
unittest(n1, "testcase setup failure\n");
n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2");
unittest(n2, "testcase setup failure\n");
n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21");
unittest(n21, "testcase setup failure %p\n", n21);
nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
unittest(nremove, "testcase setup failure\n");
ppadd = __of_prop_dup(&padd, GFP_KERNEL);
unittest(ppadd, "testcase setup failure\n");
ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
unittest(ppupdate, "testcase setup failure\n");
parent = nremove->parent;
n1->parent = parent;
n2->parent = parent;
n21->parent = n2;
n2->child = n21;
ppremove = of_find_property(parent, "prop-remove", NULL);
unittest(ppremove, "failed to find removal prop");
of_changeset_init(&chgset);
unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
unittest(!of_changeset_apply(&chgset), "apply failed\n");
/* Make sure node names are constructed correctly */
unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
"'%pOF' not added\n", n21);
of_node_put(np);
unittest(!of_changeset_revert(&chgset), "revert failed\n");
of_changeset_destroy(&chgset);
#endif
}
static void __init of_unittest_parse_interrupts(void)
{
struct device_node *np;
struct of_phandle_args args;
int i, rc;
np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
if (!np) {
pr_err("missing testcase data\n");
return;
}
for (i = 0; i < 4; i++) {
bool passed = true;
args.args_count = 0;
rc = of_irq_parse_one(np, i, &args);
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == (i + 1));
unittest(passed, "index %i - data error on node %pOF rc=%i\n",
i, args.np, rc);
}
of_node_put(np);
np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
if (!np) {
pr_err("missing testcase data\n");
return;
}
for (i = 0; i < 4; i++) {
bool passed = true;
args.args_count = 0;
rc = of_irq_parse_one(np, i, &args);
/* Test the values from tests-phandle.dtsi */
switch (i) {
case 0:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == 9);
break;
case 1:
passed &= !rc;
passed &= (args.args_count == 3);
passed &= (args.args[0] == 10);
passed &= (args.args[1] == 11);
passed &= (args.args[2] == 12);
break;
case 2:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == 13);
passed &= (args.args[1] == 14);
break;
case 3:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == 15);
passed &= (args.args[1] == 16);
break;
default:
passed = false;
}
unittest(passed, "index %i - data error on node %pOF rc=%i\n",
i, args.np, rc);
}
of_node_put(np);
}
static void __init of_unittest_parse_interrupts_extended(void)
{
struct device_node *np;
struct of_phandle_args args;
int i, rc;
np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
if (!np) {
pr_err("missing testcase data\n");
return;
}
for (i = 0; i < 7; i++) {
bool passed = true;
rc = of_irq_parse_one(np, i, &args);
/* Test the values from tests-phandle.dtsi */
switch (i) {
case 0:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == 1);
break;
case 1:
passed &= !rc;
passed &= (args.args_count == 3);
passed &= (args.args[0] == 2);
passed &= (args.args[1] == 3);
passed &= (args.args[2] == 4);
break;
case 2:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == 5);
passed &= (args.args[1] == 6);
break;
case 3:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == 9);
break;
case 4:
passed &= !rc;
passed &= (args.args_count == 3);
passed &= (args.args[0] == 10);
passed &= (args.args[1] == 11);
passed &= (args.args[2] == 12);
break;
case 5:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == 13);
passed &= (args.args[1] == 14);
break;
case 6:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == 15);
break;
default:
passed = false;
}
unittest(passed, "index %i - data error on node %pOF rc=%i\n",
i, args.np, rc);
}
of_node_put(np);
}
static const struct of_device_id match_node_table[] = {
{ .data = "A", .name = "name0", }, /* Name alone is lowest priority */
{ .data = "B", .type = "type1", }, /* followed by type alone */
{ .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
{ .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
{ .data = "Cc", .name = "name2", .type = "type2", },
{ .data = "E", .compatible = "compat3" },
{ .data = "G", .compatible = "compat2", },
{ .data = "H", .compatible = "compat2", .name = "name5", },
{ .data = "I", .compatible = "compat2", .type = "type1", },
{ .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
{ .data = "K", .compatible = "compat2", .name = "name9", },
{}
};
static struct {
const char *path;
const char *data;
} match_node_tests[] = {
{ .path = "/testcase-data/match-node/name0", .data = "A", },
{ .path = "/testcase-data/match-node/name1", .data = "B", },
{ .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
{ .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
{ .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
{ .path = "/testcase-data/match-node/name3", .data = "E", },
{ .path = "/testcase-data/match-node/name4", .data = "G", },
{ .path = "/testcase-data/match-node/name5", .data = "H", },
{ .path = "/testcase-data/match-node/name6", .data = "G", },
{ .path = "/testcase-data/match-node/name7", .data = "I", },
{ .path = "/testcase-data/match-node/name8", .data = "J", },
{ .path = "/testcase-data/match-node/name9", .data = "K", },
};
static void __init of_unittest_match_node(void)
{
struct device_node *np;
const struct of_device_id *match;
int i;
for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
np = of_find_node_by_path(match_node_tests[i].path);
if (!np) {
unittest(0, "missing testcase node %s\n",
match_node_tests[i].path);
continue;
}
match = of_match_node(match_node_table, np);
if (!match) {
unittest(0, "%s didn't match anything\n",
match_node_tests[i].path);
continue;
}
if (strcmp(match->data, match_node_tests[i].data) != 0) {
unittest(0, "%s got wrong match. expected %s, got %s\n",
match_node_tests[i].path, match_node_tests[i].data,
(const char *)match->data);
continue;
}
unittest(1, "passed");
}
}
static struct resource test_bus_res = {
.start = 0xfffffff8,
.end = 0xfffffff9,
.flags = IORESOURCE_MEM,
};
static const struct platform_device_info test_bus_info = {
.name = "unittest-bus",
};
static void __init of_unittest_platform_populate(void)
{
int irq, rc;
struct device_node *np, *child, *grandchild;
struct platform_device *pdev, *test_bus;
const struct of_device_id match[] = {
{ .compatible = "test-device", },
{}
};
np = of_find_node_by_path("/testcase-data");
of_platform_default_populate(np, NULL, NULL);
/* Test that a missing irq domain returns -EPROBE_DEFER */
np = of_find_node_by_path("/testcase-data/testcase-device1");
pdev = of_find_device_by_node(np);
unittest(pdev, "device 1 creation failed\n");
irq = platform_get_irq(pdev, 0);
unittest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
/* Test that a parsing failure does not return -EPROBE_DEFER */
np = of_find_node_by_path("/testcase-data/testcase-device2");
pdev = of_find_device_by_node(np);
unittest(pdev, "device 2 creation failed\n");
irq = platform_get_irq(pdev, 0);
unittest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
np = of_find_node_by_path("/testcase-data/platform-tests");
unittest(np, "No testcase data in device tree\n");
if (!np)
return;
test_bus = platform_device_register_full(&test_bus_info);
rc = PTR_ERR_OR_ZERO(test_bus);
unittest(!rc, "testbus registration failed; rc=%i\n", rc);
if (rc)
return;
test_bus->dev.of_node = np;
/*
* Add a dummy resource to the test bus node after it is
* registered to catch problems with un-inserted resources. The
* DT code doesn't insert the resources, and it has caused the
* kernel to oops in the past. This makes sure the same bug
* doesn't crop up again.
*/
platform_device_add_resources(test_bus, &test_bus_res, 1);
of_platform_populate(np, match, NULL, &test_bus->dev);
for_each_child_of_node(np, child) {
for_each_child_of_node(child, grandchild)
unittest(of_find_device_by_node(grandchild),
"Could not create device for node '%s'\n",
grandchild->name);
}
of_platform_depopulate(&test_bus->dev);
for_each_child_of_node(np, child) {
for_each_child_of_node(child, grandchild)
unittest(!of_find_device_by_node(grandchild),
"device didn't get destroyed '%s'\n",
grandchild->name);
}
platform_device_unregister(test_bus);
of_node_put(np);
}
/**
* update_node_properties - adds the properties
* of np into dup node (present in live tree) and
* updates parent of children of np to dup.
*
* @np: node already present in live tree
* @dup: node present in live tree to be updated
*/
static void update_node_properties(struct device_node *np,
struct device_node *dup)
{
struct property *prop;
struct device_node *child;
for_each_property_of_node(np, prop)
of_add_property(dup, prop);
for_each_child_of_node(np, child)
child->parent = dup;
}
/**
* attach_node_and_children - attaches nodes
* and its children to live tree
*
* @np: Node to attach to live tree
*/
static int attach_node_and_children(struct device_node *np)
{
struct device_node *next, *dup, *child;
unsigned long flags;
const char *full_name;
full_name = kasprintf(GFP_KERNEL, "%pOF", np);
dup = of_find_node_by_path(full_name);
kfree(full_name);
if (dup) {
update_node_properties(np, dup);
return 0;
}
child = np->child;
np->child = NULL;
mutex_lock(&of_mutex);
raw_spin_lock_irqsave(&devtree_lock, flags);
np->sibling = np->parent->child;
np->parent->child = np;
of_node_clear_flag(np, OF_DETACHED);
raw_spin_unlock_irqrestore(&devtree_lock, flags);
__of_attach_node_sysfs(np);
mutex_unlock(&of_mutex);
while (child) {
next = child->sibling;
attach_node_and_children(child);
child = next;
}
return 0;
}
/**
* unittest_data_add - Reads, copies data from
* linked tree and attaches it to the live tree
*/
static int __init unittest_data_add(void)
{
void *unittest_data;
struct device_node *unittest_data_node, *np;
/*
* __dtb_testcases_begin[] and __dtb_testcases_end[] are magically
* created by cmd_dt_S_dtb in scripts/Makefile.lib
*/
extern uint8_t __dtb_testcases_begin[];
extern uint8_t __dtb_testcases_end[];
const int size = __dtb_testcases_end - __dtb_testcases_begin;
int rc;
if (!size) {
pr_warn("%s: No testcase data to attach; not running tests\n",
__func__);
return -ENODATA;
}
/* creating copy */
unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
if (!unittest_data) {
pr_warn("%s: Failed to allocate memory for unittest_data; "
"not running tests\n", __func__);
return -ENOMEM;
}
of_fdt_unflatten_tree(unittest_data, NULL, &unittest_data_node);
if (!unittest_data_node) {
pr_warn("%s: No tree to attach; not running tests\n", __func__);
return -ENODATA;
}
of_node_set_flag(unittest_data_node, OF_DETACHED);
rc = of_resolve_phandles(unittest_data_node);
if (rc) {
pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
return -EINVAL;
}
if (!of_root) {
of_root = unittest_data_node;
for_each_of_allnodes(np)
__of_attach_node_sysfs(np);
of_aliases = of_find_node_by_path("/aliases");
of_chosen = of_find_node_by_path("/chosen");
return 0;
}
/* attach the sub-tree to live tree */
np = unittest_data_node->child;
while (np) {
struct device_node *next = np->sibling;
np->parent = of_root;
attach_node_and_children(np);
np = next;
}
return 0;
}
#ifdef CONFIG_OF_OVERLAY
static int unittest_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
if (np == NULL) {
dev_err(dev, "No OF data for device\n");
return -EINVAL;
}
dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
of_platform_populate(np, NULL, NULL, &pdev->dev);
return 0;
}
static int unittest_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
return 0;
}
static const struct of_device_id unittest_match[] = {
{ .compatible = "unittest", },
{},
};
static struct platform_driver unittest_driver = {
.probe = unittest_probe,
.remove = unittest_remove,
.driver = {
.name = "unittest",
.of_match_table = of_match_ptr(unittest_match),
},
};
/* get the platform device instantiated at the path */
static struct platform_device *of_path_to_platform_device(const char *path)
{
struct device_node *np;
struct platform_device *pdev;
np = of_find_node_by_path(path);
if (np == NULL)
return NULL;
pdev = of_find_device_by_node(np);
of_node_put(np);
return pdev;
}
/* find out if a platform device exists at that path */
static int of_path_platform_device_exists(const char *path)
{
struct platform_device *pdev;
pdev = of_path_to_platform_device(path);
platform_device_put(pdev);
return pdev != NULL;
}
#if IS_BUILTIN(CONFIG_I2C)
/* get the i2c client device instantiated at the path */
static struct i2c_client *of_path_to_i2c_client(const char *path)
{
struct device_node *np;
struct i2c_client *client;
np = of_find_node_by_path(path);
if (np == NULL)
return NULL;
client = of_find_i2c_device_by_node(np);
of_node_put(np);
return client;
}
/* find out if a i2c client device exists at that path */
static int of_path_i2c_client_exists(const char *path)
{
struct i2c_client *client;
client = of_path_to_i2c_client(path);
if (client)
put_device(&client->dev);
return client != NULL;
}
#else
static int of_path_i2c_client_exists(const char *path)
{
return 0;
}
#endif
enum overlay_type {
PDEV_OVERLAY,
I2C_OVERLAY
};
static int of_path_device_type_exists(const char *path,
enum overlay_type ovtype)
{
switch (ovtype) {
case PDEV_OVERLAY:
return of_path_platform_device_exists(path);
case I2C_OVERLAY:
return of_path_i2c_client_exists(path);
}
return 0;
}
static const char *unittest_path(int nr, enum overlay_type ovtype)
{
const char *base;
static char buf[256];
switch (ovtype) {
case PDEV_OVERLAY:
base = "/testcase-data/overlay-node/test-bus";
break;
case I2C_OVERLAY:
base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
break;
default:
buf[0] = '\0';
return buf;
}
snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
buf[sizeof(buf) - 1] = '\0';
return buf;
}
static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
{
const char *path;
path = unittest_path(unittest_nr, ovtype);
switch (ovtype) {
case PDEV_OVERLAY:
return of_path_platform_device_exists(path);
case I2C_OVERLAY:
return of_path_i2c_client_exists(path);
}
return 0;
}
static const char *overlay_path(int nr)
{
static char buf[256];
snprintf(buf, sizeof(buf) - 1,
"/testcase-data/overlay%d", nr);
buf[sizeof(buf) - 1] = '\0';
return buf;
}
static const char *bus_path = "/testcase-data/overlay-node/test-bus";
/* it is guaranteed that overlay ids are assigned in sequence */
#define MAX_UNITTEST_OVERLAYS 256
static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)];
static int overlay_first_id = -1;
static void of_unittest_track_overlay(int id)
{
if (overlay_first_id < 0)
overlay_first_id = id;
id -= overlay_first_id;
/* we shouldn't need that many */
BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id);
}
static void of_unittest_untrack_overlay(int id)
{
if (overlay_first_id < 0)
return;
id -= overlay_first_id;
BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
}
static void of_unittest_destroy_tracked_overlays(void)
{
int id, ret, defers;
if (overlay_first_id < 0)
return;
/* try until no defers */
do {
defers = 0;
/* remove in reverse order */
for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) {
if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id)))
continue;
ret = of_overlay_destroy(id + overlay_first_id);
if (ret == -ENODEV) {
pr_warn("%s: no overlay to destroy for #%d\n",
__func__, id + overlay_first_id);
continue;
}
if (ret != 0) {
defers++;
pr_warn("%s: overlay destroy failed for #%d\n",
__func__, id + overlay_first_id);
continue;
}
overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
}
} while (defers > 0);
}
static int of_unittest_apply_overlay(int overlay_nr, int unittest_nr,
int *overlay_id)
{
struct device_node *np = NULL;
int ret, id = -1;
np = of_find_node_by_path(overlay_path(overlay_nr));
if (np == NULL) {
unittest(0, "could not find overlay node @\"%s\"\n",
overlay_path(overlay_nr));
ret = -EINVAL;
goto out;
}
ret = of_overlay_create(np);
if (ret < 0) {
unittest(0, "could not create overlay from \"%s\"\n",
overlay_path(overlay_nr));
goto out;
}
id = ret;
of_unittest_track_overlay(id);
ret = 0;
out:
of_node_put(np);
if (overlay_id)
*overlay_id = id;
return ret;
}
/* apply an overlay while checking before and after states */
static int of_unittest_apply_overlay_check(int overlay_nr, int unittest_nr,
int before, int after, enum overlay_type ovtype)
{
int ret;
/* unittest device must not be in before state */
if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
overlay_path(overlay_nr),
unittest_path(unittest_nr, ovtype),
!before ? "enabled" : "disabled");
return -EINVAL;
}
ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, NULL);
if (ret != 0) {
/* of_unittest_apply_overlay already called unittest() */
return ret;
}
/* unittest device must be to set to after state */
if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
overlay_path(overlay_nr),
unittest_path(unittest_nr, ovtype),
!after ? "enabled" : "disabled");
return -EINVAL;
}
return 0;
}
/* apply an overlay and then revert it while checking before, after states */
static int of_unittest_apply_revert_overlay_check(int overlay_nr,
int unittest_nr, int before, int after,
enum overlay_type ovtype)
{
int ret, ov_id;
/* unittest device must be in before state */
if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
overlay_path(overlay_nr),
unittest_path(unittest_nr, ovtype),
!before ? "enabled" : "disabled");
return -EINVAL;
}
/* apply the overlay */
ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ov_id);
if (ret != 0) {
/* of_unittest_apply_overlay already called unittest() */
return ret;
}
/* unittest device must be in after state */
if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
overlay_path(overlay_nr),
unittest_path(unittest_nr, ovtype),
!after ? "enabled" : "disabled");
return -EINVAL;
}
ret = of_overlay_destroy(ov_id);
if (ret != 0) {
unittest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
overlay_path(overlay_nr),
unittest_path(unittest_nr, ovtype));
return ret;
}
/* unittest device must be again in before state */
if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
overlay_path(overlay_nr),
unittest_path(unittest_nr, ovtype),
!before ? "enabled" : "disabled");
return -EINVAL;
}
return 0;
}
/* test activation of device */
static void of_unittest_overlay_0(void)
{
int ret;
/* device should enable */
ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 0);
}
/* test deactivation of device */
static void of_unittest_overlay_1(void)
{
int ret;
/* device should disable */
ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 1);
}
/* test activation of device */
static void of_unittest_overlay_2(void)
{
int ret;
/* device should enable */
ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 2);
}
/* test deactivation of device */
static void of_unittest_overlay_3(void)
{
int ret;
/* device should disable */
ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 3);
}
/* test activation of a full device node */
static void of_unittest_overlay_4(void)
{
int ret;
/* device should disable */
ret = of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 4);
}
/* test overlay apply/revert sequence */
static void of_unittest_overlay_5(void)
{
int ret;
/* device should disable */
ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 5);
}
/* test overlay application in sequence */
static void of_unittest_overlay_6(void)
{
struct device_node *np;
int ret, i, ov_id[2];
int overlay_nr = 6, unittest_nr = 6;
int before = 0, after = 1;
/* unittest device must be in before state */
for (i = 0; i < 2; i++) {
if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
!= before) {
unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
overlay_path(overlay_nr + i),
unittest_path(unittest_nr + i,
PDEV_OVERLAY),
!before ? "enabled" : "disabled");
return;
}
}
/* apply the overlays */
for (i = 0; i < 2; i++) {
np = of_find_node_by_path(overlay_path(overlay_nr + i));
if (np == NULL) {
unittest(0, "could not find overlay node @\"%s\"\n",
overlay_path(overlay_nr + i));
return;
}
ret = of_overlay_create(np);
if (ret < 0) {
unittest(0, "could not create overlay from \"%s\"\n",
overlay_path(overlay_nr + i));
return;
}
ov_id[i] = ret;
of_unittest_track_overlay(ov_id[i]);
}
for (i = 0; i < 2; i++) {
/* unittest device must be in after state */
if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
!= after) {
unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
overlay_path(overlay_nr + i),
unittest_path(unittest_nr + i,
PDEV_OVERLAY),
!after ? "enabled" : "disabled");
return;
}
}
for (i = 1; i >= 0; i--) {
ret = of_overlay_destroy(ov_id[i]);
if (ret != 0) {
unittest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
overlay_path(overlay_nr + i),
unittest_path(unittest_nr + i,
PDEV_OVERLAY));
return;
}
of_unittest_untrack_overlay(ov_id[i]);
}
for (i = 0; i < 2; i++) {
/* unittest device must be again in before state */
if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
!= before) {
unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
overlay_path(overlay_nr + i),
unittest_path(unittest_nr + i,
PDEV_OVERLAY),
!before ? "enabled" : "disabled");
return;
}
}
unittest(1, "overlay test %d passed\n", 6);
}
/* test overlay application in sequence */
static void of_unittest_overlay_8(void)
{
struct device_node *np;
int ret, i, ov_id[2];
int overlay_nr = 8, unittest_nr = 8;
/* we don't care about device state in this test */
/* apply the overlays */
for (i = 0; i < 2; i++) {
np = of_find_node_by_path(overlay_path(overlay_nr + i));
if (np == NULL) {
unittest(0, "could not find overlay node @\"%s\"\n",
overlay_path(overlay_nr + i));
return;
}
ret = of_overlay_create(np);
if (ret < 0) {
unittest(0, "could not create overlay from \"%s\"\n",
overlay_path(overlay_nr + i));
return;
}
ov_id[i] = ret;
of_unittest_track_overlay(ov_id[i]);
}
/* now try to remove first overlay (it should fail) */
ret = of_overlay_destroy(ov_id[0]);
if (ret == 0) {
unittest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
overlay_path(overlay_nr + 0),
unittest_path(unittest_nr,
PDEV_OVERLAY));
return;
}
/* removing them in order should work */
for (i = 1; i >= 0; i--) {
ret = of_overlay_destroy(ov_id[i]);
if (ret != 0) {
unittest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
overlay_path(overlay_nr + i),
unittest_path(unittest_nr,
PDEV_OVERLAY));
return;
}
of_unittest_untrack_overlay(ov_id[i]);
}
unittest(1, "overlay test %d passed\n", 8);
}
/* test insertion of a bus with parent devices */
static void of_unittest_overlay_10(void)
{
int ret;
char *child_path;
/* device should disable */
ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
if (unittest(ret == 0,
"overlay test %d failed; overlay application\n", 10))
return;
child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
unittest_path(10, PDEV_OVERLAY));
if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
return;
ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
kfree(child_path);
if (unittest(ret, "overlay test %d failed; no child device\n", 10))
return;
}
/* test insertion of a bus with parent devices (and revert) */
static void of_unittest_overlay_11(void)
{
int ret;
/* device should disable */
ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
PDEV_OVERLAY);
if (unittest(ret == 0,
"overlay test %d failed; overlay application\n", 11))
return;
}
#if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
struct unittest_i2c_bus_data {
struct platform_device *pdev;
struct i2c_adapter adap;
};
static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
struct i2c_msg *msgs, int num)
{
struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
(void)std;
return num;
}
static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
{
return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
}
static const struct i2c_algorithm unittest_i2c_algo = {
.master_xfer = unittest_i2c_master_xfer,
.functionality = unittest_i2c_functionality,
};
static int unittest_i2c_bus_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct unittest_i2c_bus_data *std;
struct i2c_adapter *adap;
int ret;
if (np == NULL) {
dev_err(dev, "No OF data for device\n");
return -EINVAL;
}
dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
if (!std) {
dev_err(dev, "Failed to allocate unittest i2c data\n");
return -ENOMEM;
}
/* link them together */
std->pdev = pdev;
platform_set_drvdata(pdev, std);
adap = &std->adap;
i2c_set_adapdata(adap, std);
adap->nr = -1;
strlcpy(adap->name, pdev->name, sizeof(adap->name));
adap->class = I2C_CLASS_DEPRECATED;
adap->algo = &unittest_i2c_algo;
adap->dev.parent = dev;
adap->dev.of_node = dev->of_node;
adap->timeout = 5 * HZ;
adap->retries = 3;
ret = i2c_add_numbered_adapter(adap);
if (ret != 0) {
dev_err(dev, "Failed to add I2C adapter\n");
return ret;
}
return 0;
}
static int unittest_i2c_bus_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
i2c_del_adapter(&std->adap);
return 0;
}
static const struct of_device_id unittest_i2c_bus_match[] = {
{ .compatible = "unittest-i2c-bus", },
{},
};
static struct platform_driver unittest_i2c_bus_driver = {
.probe = unittest_i2c_bus_probe,
.remove = unittest_i2c_bus_remove,
.driver = {
.name = "unittest-i2c-bus",
.of_match_table = of_match_ptr(unittest_i2c_bus_match),
},
};
static int unittest_i2c_dev_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct device_node *np = client->dev.of_node;
if (!np) {
dev_err(dev, "No OF node\n");
return -EINVAL;
}
dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
return 0;
};
static int unittest_i2c_dev_remove(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct device_node *np = client->dev.of_node;
dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
return 0;
}
static const struct i2c_device_id unittest_i2c_dev_id[] = {
{ .name = "unittest-i2c-dev" },
{ }
};
static struct i2c_driver unittest_i2c_dev_driver = {
.driver = {
.name = "unittest-i2c-dev",
},
.probe = unittest_i2c_dev_probe,
.remove = unittest_i2c_dev_remove,
.id_table = unittest_i2c_dev_id,
};
#if IS_BUILTIN(CONFIG_I2C_MUX)
static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan)
{
return 0;
}
static int unittest_i2c_mux_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret, i, nchans;
struct device *dev = &client->dev;
struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
struct device_node *np = client->dev.of_node, *child;
struct i2c_mux_core *muxc;
u32 reg, max_reg;
dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
if (!np) {
dev_err(dev, "No OF node\n");
return -EINVAL;
}
max_reg = (u32)-1;
for_each_child_of_node(np, child) {
ret = of_property_read_u32(child, "reg", &reg);
if (ret)
continue;
if (max_reg == (u32)-1 || reg > max_reg)
max_reg = reg;
}
nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
if (nchans == 0) {
dev_err(dev, "No channels\n");
return -EINVAL;
}
muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0,
unittest_i2c_mux_select_chan, NULL);
if (!muxc)
return -ENOMEM;
for (i = 0; i < nchans; i++) {
ret = i2c_mux_add_adapter(muxc, 0, i, 0);
if (ret) {
dev_err(dev, "Failed to register mux #%d\n", i);
i2c_mux_del_adapters(muxc);
return -ENODEV;
}
}
i2c_set_clientdata(client, muxc);
return 0;
};
static int unittest_i2c_mux_remove(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct device_node *np = client->dev.of_node;
struct i2c_mux_core *muxc = i2c_get_clientdata(client);
dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
i2c_mux_del_adapters(muxc);
return 0;
}
static const struct i2c_device_id unittest_i2c_mux_id[] = {
{ .name = "unittest-i2c-mux" },
{ }
};
static struct i2c_driver unittest_i2c_mux_driver = {
.driver = {
.name = "unittest-i2c-mux",
},
.probe = unittest_i2c_mux_probe,
.remove = unittest_i2c_mux_remove,
.id_table = unittest_i2c_mux_id,
};
#endif
static int of_unittest_overlay_i2c_init(void)
{
int ret;
ret = i2c_add_driver(&unittest_i2c_dev_driver);
if (unittest(ret == 0,
"could not register unittest i2c device driver\n"))
return ret;
ret = platform_driver_register(&unittest_i2c_bus_driver);
if (unittest(ret == 0,
"could not register unittest i2c bus driver\n"))
return ret;
#if IS_BUILTIN(CONFIG_I2C_MUX)
ret = i2c_add_driver(&unittest_i2c_mux_driver);
if (unittest(ret == 0,
"could not register unittest i2c mux driver\n"))
return ret;
#endif
return 0;
}
static void of_unittest_overlay_i2c_cleanup(void)
{
#if IS_BUILTIN(CONFIG_I2C_MUX)
i2c_del_driver(&unittest_i2c_mux_driver);
#endif
platform_driver_unregister(&unittest_i2c_bus_driver);
i2c_del_driver(&unittest_i2c_dev_driver);
}
static void of_unittest_overlay_i2c_12(void)
{
int ret;
/* device should enable */
ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 12);
}
/* test deactivation of device */
static void of_unittest_overlay_i2c_13(void)
{
int ret;
/* device should disable */
ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 13);
}
/* just check for i2c mux existence */
static void of_unittest_overlay_i2c_14(void)
{
}
static void of_unittest_overlay_i2c_15(void)
{
int ret;
/* device should enable */
ret = of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 15);
}
#else
static inline void of_unittest_overlay_i2c_14(void) { }
static inline void of_unittest_overlay_i2c_15(void) { }
#endif
static void __init of_unittest_overlay(void)
{
struct device_node *bus_np = NULL;
int ret;
ret = platform_driver_register(&unittest_driver);
if (ret != 0) {
unittest(0, "could not register unittest driver\n");
goto out;
}
bus_np = of_find_node_by_path(bus_path);
if (bus_np == NULL) {
unittest(0, "could not find bus_path \"%s\"\n", bus_path);
goto out;
}
ret = of_platform_default_populate(bus_np, NULL, NULL);
if (ret != 0) {
unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
goto out;
}
if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
unittest(0, "could not find unittest0 @ \"%s\"\n",
unittest_path(100, PDEV_OVERLAY));
goto out;
}
if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
unittest(0, "unittest1 @ \"%s\" should not exist\n",
unittest_path(101, PDEV_OVERLAY));
goto out;
}
unittest(1, "basic infrastructure of overlays passed");
/* tests in sequence */
of_unittest_overlay_0();
of_unittest_overlay_1();
of_unittest_overlay_2();
of_unittest_overlay_3();
of_unittest_overlay_4();
of_unittest_overlay_5();
of_unittest_overlay_6();
of_unittest_overlay_8();
of_unittest_overlay_10();
of_unittest_overlay_11();
#if IS_BUILTIN(CONFIG_I2C)
if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
goto out;
of_unittest_overlay_i2c_12();
of_unittest_overlay_i2c_13();
of_unittest_overlay_i2c_14();
of_unittest_overlay_i2c_15();
of_unittest_overlay_i2c_cleanup();
#endif
of_unittest_destroy_tracked_overlays();
out:
of_node_put(bus_np);
}
#else
static inline void __init of_unittest_overlay(void) { }
#endif
#ifdef CONFIG_OF_OVERLAY
/*
* __dtb_ot_begin[] and __dtb_ot_end[] are created by cmd_dt_S_dtb
* in scripts/Makefile.lib
*/
#define OVERLAY_INFO_EXTERN(name) \
extern uint8_t __dtb_##name##_begin[]; \
extern uint8_t __dtb_##name##_end[]
#define OVERLAY_INFO(name, expected) \
{ .dtb_begin = __dtb_##name##_begin, \
.dtb_end = __dtb_##name##_end, \
.expected_result = expected, \
}
struct overlay_info {
uint8_t *dtb_begin;
uint8_t *dtb_end;
void *data;
struct device_node *np_overlay;
int expected_result;
int overlay_id;
};
OVERLAY_INFO_EXTERN(overlay_base);
OVERLAY_INFO_EXTERN(overlay);
OVERLAY_INFO_EXTERN(overlay_bad_phandle);
OVERLAY_INFO_EXTERN(overlay_bad_symbol);
/* order of entries is hard-coded into users of overlays[] */
static struct overlay_info overlays[] = {
OVERLAY_INFO(overlay_base, -9999),
OVERLAY_INFO(overlay, 0),
OVERLAY_INFO(overlay_bad_phandle, -EINVAL),
OVERLAY_INFO(overlay_bad_symbol, -EINVAL),
{}
};
static struct device_node *overlay_base_root;
/*
* Create base device tree for the overlay unittest.
*
* This is called from very early boot code.
*
* Do as much as possible the same way as done in __unflatten_device_tree
* and other early boot steps for the normal FDT so that the overlay base
* unflattened tree will have the same characteristics as the real tree
* (such as having memory allocated by the early allocator). The goal
* is to test "the real thing" as much as possible, and test "test setup
* code" as little as possible.
*
* Have to stop before resolving phandles, because that uses kmalloc.
*/
void __init unittest_unflatten_overlay_base(void)
{
struct overlay_info *info;
u32 data_size;
u32 size;
info = &overlays[0];
if (info->expected_result != -9999) {
pr_err("No dtb 'overlay_base' to attach\n");
return;
}
data_size = info->dtb_end - info->dtb_begin;
if (!data_size) {
pr_err("No dtb 'overlay_base' to attach\n");
return;
}
size = fdt_totalsize(info->dtb_begin);
if (size != data_size) {
pr_err("dtb 'overlay_base' header totalsize != actual size");
return;
}
info->data = early_init_dt_alloc_memory_arch(size,
roundup_pow_of_two(FDT_V17_SIZE));
if (!info->data) {
pr_err("alloc for dtb 'overlay_base' failed");
return;
}
memcpy(info->data, info->dtb_begin, size);
__unflatten_device_tree(info->data, NULL, &info->np_overlay,
early_init_dt_alloc_memory_arch, true);
overlay_base_root = info->np_overlay;
}
/*
* The purpose of of_unittest_overlay_data_add is to add an
* overlay in the normal fashion. This is a test of the whole
* picture, instead of testing individual elements.
*
* A secondary purpose is to be able to verify that the contents of
* /proc/device-tree/ contains the updated structure and values from
* the overlay. That must be verified separately in user space.
*
* Return 0 on unexpected error.
*/
static int __init overlay_data_add(int onum)
{
struct overlay_info *info;
int k;
int ret;
u32 size;
u32 size_from_header;
for (k = 0, info = overlays; info; info++, k++) {
if (k == onum)
break;
}
if (onum > k)
return 0;
size = info->dtb_end - info->dtb_begin;
if (!size) {
pr_err("no overlay to attach, %d\n", onum);
ret = 0;
}
size_from_header = fdt_totalsize(info->dtb_begin);
if (size_from_header != size) {
pr_err("overlay header totalsize != actual size, %d", onum);
return 0;
}
/*
* Must create permanent copy of FDT because of_fdt_unflatten_tree()
* will create pointers to the passed in FDT in the EDT.
*/
info->data = kmemdup(info->dtb_begin, size, GFP_KERNEL);
if (!info->data) {
pr_err("unable to allocate memory for data, %d\n", onum);
return 0;
}
of_fdt_unflatten_tree(info->data, NULL, &info->np_overlay);
if (!info->np_overlay) {
pr_err("unable to unflatten overlay, %d\n", onum);
ret = 0;
goto out_free_data;
}
of_node_set_flag(info->np_overlay, OF_DETACHED);
ret = of_resolve_phandles(info->np_overlay);
if (ret) {
pr_err("resolve ot phandles (ret=%d), %d\n", ret, onum);
goto out_free_np_overlay;
}
ret = of_overlay_create(info->np_overlay);
if (ret < 0) {
pr_err("of_overlay_create() (ret=%d), %d\n", ret, onum);
goto out_free_np_overlay;
} else {
info->overlay_id = ret;
ret = 0;
}
pr_debug("__dtb_overlay_begin applied, overlay id %d\n", ret);
goto out;
out_free_np_overlay:
/*
* info->np_overlay is the unflattened device tree
* It has not been spliced into the live tree.
*/
/* todo: function to free unflattened device tree */
out_free_data:
kfree(info->data);
out:
return (ret == info->expected_result);
}
/*
* The purpose of of_unittest_overlay_high_level is to add an overlay
* in the normal fashion. This is a test of the whole picture,
* instead of individual elements.
*
* The first part of the function is _not_ normal overlay usage; it is
* finishing splicing the base overlay device tree into the live tree.
*/
static __init void of_unittest_overlay_high_level(void)
{
struct device_node *last_sibling;
struct device_node *np;
struct device_node *of_symbols;
struct device_node *overlay_base_symbols;
struct device_node **pprev;
struct property *prop;
int ret;
if (!overlay_base_root) {
unittest(0, "overlay_base_root not initialized\n");
return;
}
/*
* Could not fixup phandles in unittest_unflatten_overlay_base()
* because kmalloc() was not yet available.
*/
of_resolve_phandles(overlay_base_root);
/*
* do not allow overlay_base to duplicate any node already in
* tree, this greatly simplifies the code
*/
/*
* remove overlay_base_root node "__local_fixups", after
* being used by of_resolve_phandles()
*/
pprev = &overlay_base_root->child;
for (np = overlay_base_root->child; np; np = np->sibling) {
if (!of_node_cmp(np->name, "__local_fixups__")) {
*pprev = np->sibling;
break;
}
pprev = &np->sibling;
}
/* remove overlay_base_root node "__symbols__" if in live tree */
of_symbols = of_get_child_by_name(of_root, "__symbols__");
if (of_symbols) {
/* will have to graft properties from node into live tree */
pprev = &overlay_base_root->child;
for (np = overlay_base_root->child; np; np = np->sibling) {
if (!of_node_cmp(np->name, "__symbols__")) {
overlay_base_symbols = np;
*pprev = np->sibling;
break;
}
pprev = &np->sibling;
}
}
for (np = overlay_base_root->child; np; np = np->sibling) {
if (of_get_child_by_name(of_root, np->name)) {
unittest(0, "illegal node name in overlay_base %s",
np->name);
return;
}
}
/*
* overlay 'overlay_base' is not allowed to have root
* properties, so only need to splice nodes into main device tree.
*
* root node of *overlay_base_root will not be freed, it is lost
* memory.
*/
for (np = overlay_base_root->child; np; np = np->sibling)
np->parent = of_root;
mutex_lock(&of_mutex);
for (last_sibling = np = of_root->child; np; np = np->sibling)
last_sibling = np;
if (last_sibling)
last_sibling->sibling = overlay_base_root->child;
else
of_root->child = overlay_base_root->child;
for_each_of_allnodes_from(overlay_base_root, np)
__of_attach_node_sysfs(np);
if (of_symbols) {
for_each_property_of_node(overlay_base_symbols, prop) {
ret = __of_add_property(of_symbols, prop);
if (ret) {
unittest(0,
"duplicate property '%s' in overlay_base node __symbols__",
prop->name);
goto err_unlock;
}
ret = __of_add_property_sysfs(of_symbols, prop);
if (ret) {
unittest(0,
"unable to add property '%s' in overlay_base node __symbols__ to sysfs",
prop->name);
goto err_unlock;
}
}
}
mutex_unlock(&of_mutex);
/* now do the normal overlay usage test */
unittest(overlay_data_add(1),
"Adding overlay 'overlay' failed\n");
unittest(overlay_data_add(2),
"Adding overlay 'overlay_bad_phandle' failed\n");
unittest(overlay_data_add(3),
"Adding overlay 'overlay_bad_symbol' failed\n");
return;
err_unlock:
mutex_unlock(&of_mutex);
}
#else
static inline __init void of_unittest_overlay_high_level(void) {}
#endif
static int __init of_unittest(void)
{
struct device_node *np;
int res;
/* adding data for unittest */
res = unittest_data_add();
if (res)
return res;
if (!of_aliases)
of_aliases = of_find_node_by_path("/aliases");
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
if (!np) {
pr_info("No testcase data in device tree; not running tests\n");
return 0;
}
of_node_put(np);
pr_info("start of unittest - you will see error messages\n");
of_unittest_check_tree_linkage();
of_unittest_check_phandles();
of_unittest_find_node_by_name();
of_unittest_dynamic();
of_unittest_parse_phandle_with_args();
of_unittest_printf();
of_unittest_property_string();
of_unittest_property_copy();
of_unittest_changeset();
of_unittest_parse_interrupts();
of_unittest_parse_interrupts_extended();
of_unittest_match_node();
of_unittest_platform_populate();
of_unittest_overlay();
/* Double check linkage after removing testcase data */
of_unittest_check_tree_linkage();
of_unittest_overlay_high_level();
pr_info("end of unittest - %i passed, %i failed\n",
unittest_results.passed, unittest_results.failed);
return 0;
}
late_initcall(of_unittest);
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