property.c (1758047057dbe329be712a31b79db7151b5871f8) property.c (99ece713773bfa17fdb4ee2a1fb3b7bee82e4b1a)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * ACPI device specific properties support.
4 *
5 * Copyright (C) 2014, Intel Corporation
6 * All rights reserved.
7 *
8 * Authors: Mika Westerberg <mika.westerberg@linux.intel.com>

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682 /*
683 * The simplest case is when the value is a single reference. Just
684 * return that reference then.
685 */
686 if (obj->type == ACPI_TYPE_LOCAL_REFERENCE) {
687 if (index)
688 return -EINVAL;
689
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * ACPI device specific properties support.
4 *
5 * Copyright (C) 2014, Intel Corporation
6 * All rights reserved.
7 *
8 * Authors: Mika Westerberg <mika.westerberg@linux.intel.com>

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682 /*
683 * The simplest case is when the value is a single reference. Just
684 * return that reference then.
685 */
686 if (obj->type == ACPI_TYPE_LOCAL_REFERENCE) {
687 if (index)
688 return -EINVAL;
689
690 ret = acpi_bus_get_device(obj->reference.handle, &device);
691 if (ret)
692 return ret == -ENODEV ? -EINVAL : ret;
690 device = acpi_fetch_acpi_dev(obj->reference.handle);
691 if (!device)
692 return -EINVAL;
693
694 args->fwnode = acpi_fwnode_handle(device);
695 args->nargs = 0;
696 return 0;
697 }
698
699 /*
700 * If it is not a single reference, then it is a package of

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714 end = element + obj->package.count;
715
716 while (element < end) {
717 u32 nargs, i;
718
719 if (element->type == ACPI_TYPE_LOCAL_REFERENCE) {
720 struct fwnode_handle *ref_fwnode;
721
693
694 args->fwnode = acpi_fwnode_handle(device);
695 args->nargs = 0;
696 return 0;
697 }
698
699 /*
700 * If it is not a single reference, then it is a package of

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714 end = element + obj->package.count;
715
716 while (element < end) {
717 u32 nargs, i;
718
719 if (element->type == ACPI_TYPE_LOCAL_REFERENCE) {
720 struct fwnode_handle *ref_fwnode;
721
722 ret = acpi_bus_get_device(element->reference.handle,
723 &device);
724 if (ret)
722 device = acpi_fetch_acpi_dev(element->reference.handle);
723 if (!device)
725 return -EINVAL;
726
727 nargs = 0;
728 element++;
729
730 /*
731 * Find the referred data extension node under the
732 * referred device node.

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1079
1080/**
1081 * acpi_node_get_parent - Return parent fwnode of this fwnode
1082 * @fwnode: Firmware node whose parent to get
1083 *
1084 * Returns parent node of an ACPI device or data firmware node or %NULL if
1085 * not available.
1086 */
724 return -EINVAL;
725
726 nargs = 0;
727 element++;
728
729 /*
730 * Find the referred data extension node under the
731 * referred device node.

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1078
1079/**
1080 * acpi_node_get_parent - Return parent fwnode of this fwnode
1081 * @fwnode: Firmware node whose parent to get
1082 *
1083 * Returns parent node of an ACPI device or data firmware node or %NULL if
1084 * not available.
1085 */
1087static struct fwnode_handle *
1088acpi_node_get_parent(const struct fwnode_handle *fwnode)
1086struct fwnode_handle *acpi_node_get_parent(const struct fwnode_handle *fwnode)
1089{
1090 if (is_acpi_data_node(fwnode)) {
1091 /* All data nodes have parent pointer so just return that */
1092 return to_acpi_data_node(fwnode)->parent;
1093 } else if (is_acpi_device_node(fwnode)) {
1087{
1088 if (is_acpi_data_node(fwnode)) {
1089 /* All data nodes have parent pointer so just return that */
1090 return to_acpi_data_node(fwnode)->parent;
1091 } else if (is_acpi_device_node(fwnode)) {
1094 struct device *dev = to_acpi_device_node(fwnode)->dev.parent;
1092 acpi_handle handle, parent_handle;
1095
1093
1096 if (dev)
1097 return acpi_fwnode_handle(to_acpi_device(dev));
1094 handle = to_acpi_device_node(fwnode)->handle;
1095 if (ACPI_SUCCESS(acpi_get_parent(handle, &parent_handle))) {
1096 struct acpi_device *adev;
1097
1098 if (!acpi_bus_get_device(parent_handle, &adev))
1099 return acpi_fwnode_handle(adev);
1100 }
1098 }
1099
1100 return NULL;
1101}
1102
1103/*
1104 * Return true if the node is an ACPI graph node. Called on either ports
1105 * or endpoints.

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1102
1103 return NULL;
1104}
1105
1106/*
1107 * Return true if the node is an ACPI graph node. Called on either ports
1108 * or endpoints.

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