// 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->bus == &platform_bus_type) 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; }