// SPDX-License-Identifier: GPL-2.0-only
/* Copyright(c) 2021 Intel Corporation. All rights reserved. */

#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/acpi.h>
#include <cxl.h>
#include "test/mock.h"

struct acpi_device *to_cxl_host_bridge(struct device *host, struct device *dev)
{
        int index;
        struct acpi_device *adev, *found = NULL;
        struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);

        if (ops && ops->is_mock_bridge(dev)) {
                found = ACPI_COMPANION(dev);
                goto out;
        }

        if (dev_is_platform(dev))
                goto out;

        adev = to_acpi_device(dev);
        if (!acpi_pci_find_root(adev->handle))
                goto out;

        if (strcmp(acpi_device_hid(adev), "ACPI0016") == 0) {
                found = adev;
                dev_dbg(host, "found host bridge %s\n", dev_name(&adev->dev));
        }
out:
        put_cxl_mock_ops(index);
        return found;
}