C++ (Cpp) acpi_get_first_physical_node Examples

Example #1

File: dev-path-parser.c Project: AlexShiLucky/linux

static long __init parse_acpi_path(struct efi_dev_path *node,
				   struct device *parent, struct device **child)
{
	struct acpi_hid_uid hid_uid = {};
	struct device *phys_dev;

	if (node->length != 12)
		return -EINVAL;

	sprintf(hid_uid.hid[0].id, "%c%c%c%04X",
		'A' + ((node->acpi.hid >> 10) & 0x1f) - 1,
		'A' + ((node->acpi.hid >>  5) & 0x1f) - 1,
		'A' + ((node->acpi.hid >>  0) & 0x1f) - 1,
			node->acpi.hid >> 16);
	sprintf(hid_uid.uid, "%u", node->acpi.uid);

	*child = bus_find_device(&acpi_bus_type, NULL, &hid_uid,
				 match_acpi_dev);
	if (!*child)
		return -ENODEV;

	phys_dev = acpi_get_first_physical_node(to_acpi_device(*child));
	if (phys_dev) {
		get_device(phys_dev);
		put_device(*child);
		*child = phys_dev;
	}

	return 0;
}

Example #2

File: acpi_platform.c Project: imikushin/estuary-kernel

/**
 * acpi_create_platform_device - Create platform device for ACPI device node
 * @adev: ACPI device node to create a platform device for.
 *
 * Check if the given @adev can be represented as a platform device and, if
 * that's the case, create and register a platform device, populate its common
 * resources and returns a pointer to it.  Otherwise, return %NULL.
 *
 * Name of the platform device will be the same as @adev's.
 */
struct platform_device *acpi_create_platform_device(struct acpi_device *adev)
{
	struct platform_device *pdev = NULL;
	struct platform_device_info pdevinfo;
	struct resource_entry *rentry;
	struct list_head resource_list;
	struct resource *resources = NULL;
	int count;

	/* If the ACPI node already has a physical device attached, skip it. */
	if (adev->physical_node_count)
		return NULL;

	if (!acpi_match_device_ids(adev, forbidden_id_list))
		return ERR_PTR(-EINVAL);

	INIT_LIST_HEAD(&resource_list);
	count = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
	if (count < 0) {
		return NULL;
	} else if (count > 0) {
		resources = kmalloc(count * sizeof(struct resource),
				    GFP_KERNEL);
		if (!resources) {
			dev_err(&adev->dev, "No memory for resources\n");
			acpi_dev_free_resource_list(&resource_list);
			return ERR_PTR(-ENOMEM);
		}
		count = 0;
		list_for_each_entry(rentry, &resource_list, node)
			resources[count++] = *rentry->res;

		acpi_dev_free_resource_list(&resource_list);
	}

	memset(&pdevinfo, 0, sizeof(pdevinfo));
	/*
	 * If the ACPI node has a parent and that parent has a physical device
	 * attached to it, that physical device should be the parent of the
	 * platform device we are about to create.
	 */
	pdevinfo.parent = adev->parent ?
		acpi_get_first_physical_node(adev->parent) : NULL;
	pdevinfo.name = dev_name(&adev->dev);
	pdevinfo.id = -1;
	pdevinfo.res = resources;
	pdevinfo.num_res = count;
	pdevinfo.fwnode = acpi_fwnode_handle(adev);

	if (acpi_dma_supported(adev))
		pdevinfo.dma_mask = DMA_BIT_MASK(32);
	else
		pdevinfo.dma_mask = 0;

	pdev = platform_device_register_full(&pdevinfo);
	if (IS_ERR(pdev))
		dev_err(&adev->dev, "platform device creation failed: %ld\n",
			PTR_ERR(pdev));
	else
		dev_dbg(&adev->dev, "created platform device %s\n",
			dev_name(&pdev->dev));

	kfree(resources);
	return pdev;
}