linux-imx

/*

 * ACPI device specific properties support.

 *

 * Copyright (C) 2014, Intel Corporation

 * All rights reserved.

 *

 * Authors: Mika Westerberg <mika.westerberg@linux.intel.com>

 *          Darren Hart <dvhart@linux.intel.com>

 *          Rafael J. Wysocki <rafael.j.wysocki@intel.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

​

#include <linux/acpi.h>

#include <linux/device.h>

#include <linux/export.h>

​

#include "internal.h"

​

static int acpi_data_get_property_array(const struct acpi_device_data *data,

                    const char *name,

                    acpi_object_type type,

                    const union acpi_object **obj);

​

/*

 * The GUIDs here are made equivalent to each other in order to avoid extra

 * complexity in the properties handling code, with the caveat that the

 * kernel will accept certain combinations of GUID and properties that are

 * not defined without a warning. For instance if any of the properties

 * from different GUID appear in a property list of another, it will be

 * accepted by the kernel. Firmware validation tools should catch these.

 */

static const guid_t prp_guids[] = {

    /* ACPI _DSD device properties GUID: daffd814-6eba-4d8c-8a91-bc9bbf4aa301 */

    GUID_INIT(0xdaffd814, 0x6eba, 0x4d8c,

          0x8a, 0x91, 0xbc, 0x9b, 0xbf, 0x4a, 0xa3, 0x01),

    /* Hotplug in D3 GUID: 6211e2c0-58a3-4af3-90e1-927a4e0c55a4 */

    GUID_INIT(0x6211e2c0, 0x58a3, 0x4af3,

          0x90, 0xe1, 0x92, 0x7a, 0x4e, 0x0c, 0x55, 0xa4),

    /* External facing port GUID: efcc06cc-73ac-4bc3-bff0-76143807c389 */

    GUID_INIT(0xefcc06cc, 0x73ac, 0x4bc3,

          0xbf, 0xf0, 0x76, 0x14, 0x38, 0x07, 0xc3, 0x89),

};

​

static const guid_t ads_guid =

    GUID_INIT(0xdbb8e3e6, 0x5886, 0x4ba6,

          0x87, 0x95, 0x13, 0x19, 0xf5, 0x2a, 0x96, 0x6b);

​

static bool acpi_enumerate_nondev_subnodes(acpi_handle scope,

                       const union acpi_object *desc,

                       struct acpi_device_data *data,

                       struct fwnode_handle *parent);

static bool acpi_extract_properties(const union acpi_object *desc,

                    struct acpi_device_data *data);

​

static bool acpi_nondev_subnode_extract(const union acpi_object *desc,

                    acpi_handle handle,

                    const union acpi_object *link,

                    struct list_head *list,

                    struct fwnode_handle *parent)

{