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// SPDX-License-Identifier: GPL-2.0
/*
* Test managed DeviceTree APIs
*/
#include <linux/of.h>
#include <linux/of_fdt.h>
#include <kunit/of.h>
#include <kunit/test.h>
#include <kunit/resource.h>
#include "of_private.h"
/**
* of_root_kunit_skip() - Skip test if the root node isn't populated
* @test: test to skip if the root node isn't populated
*/
void of_root_kunit_skip(struct kunit *test)
{
if (IS_ENABLED(CONFIG_ARM64) && IS_ENABLED(CONFIG_ACPI) && !of_root)
kunit_skip(test, "arm64+acpi doesn't populate a root node");
}
EXPORT_SYMBOL_GPL(of_root_kunit_skip);
#if defined(CONFIG_OF_OVERLAY) && defined(CONFIG_OF_EARLY_FLATTREE)
static void of_overlay_fdt_apply_kunit_exit(void *ovcs_id)
{
of_overlay_remove(ovcs_id);
}
/**
* of_overlay_fdt_apply_kunit() - Test managed of_overlay_fdt_apply()
* @test: test context
* @overlay_fdt: device tree overlay to apply
* @overlay_fdt_size: size in bytes of @overlay_fdt
* @ovcs_id: identifier of overlay, used to remove the overlay
*
* Just like of_overlay_fdt_apply(), except the overlay is managed by the test
* case and is automatically removed with of_overlay_remove() after the test
* case concludes.
*
* Return: 0 on success, negative errno on failure
*/
int of_overlay_fdt_apply_kunit(struct kunit *test, void *overlay_fdt,
u32 overlay_fdt_size, int *ovcs_id)
{
int ret;
int *copy_id;
of_root_kunit_skip(test);
copy_id = kunit_kmalloc(test, sizeof(*copy_id), GFP_KERNEL);
if (!copy_id)
return -ENOMEM;
ret = of_overlay_fdt_apply(overlay_fdt, overlay_fdt_size,
ovcs_id, NULL);
if (ret)
return ret;
*copy_id = *ovcs_id;
return kunit_add_action_or_reset(test, of_overlay_fdt_apply_kunit_exit,
copy_id);
}
EXPORT_SYMBOL_GPL(of_overlay_fdt_apply_kunit);
#endif
KUNIT_DEFINE_ACTION_WRAPPER(of_node_put_wrapper, of_node_put, struct device_node *);
/**
* of_node_put_kunit() - Test managed of_node_put()
* @test: test context
* @node: node to pass to `of_node_put()`
*
* Just like of_node_put(), except the node is managed by the test case and is
* automatically put with of_node_put() after the test case concludes.
*/
void of_node_put_kunit(struct kunit *test, struct device_node *node)
{
if (kunit_add_action(test, of_node_put_wrapper, node)) {
KUNIT_FAIL(test,
"Can't allocate a kunit resource to put of_node\n");
}
}
EXPORT_SYMBOL_GPL(of_node_put_kunit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Test managed DeviceTree APIs");
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