1 // SPDX-License-Identifier: GPL-2.0+
16 #include <linux/dma-mapping.h>
28 	{ .compatible = "simple-bus", },
29 	{ .compatible = "simple-mfd", },
32 	{ .compatible = "arm,amba-bus", },
38  * of_find_device_by_node - Find the platform_device associated with a node
57 	BUG_ON(ofdev->dev.of_node == NULL);  in of_device_add()
61 	ofdev->name = dev_name(&ofdev->dev);  in of_device_add()
62 	ofdev->id = PLATFORM_DEVID_NONE;  in of_device_add()
69 	set_dev_node(&ofdev->dev, of_node_to_nid(ofdev->dev.of_node));  in of_device_add()
71 	return device_add(&ofdev->dev);  in of_device_add()
76 	device_initialize(&pdev->dev);  in of_device_register()
83 	device_unregister(&ofdev->dev);  in of_device_unregister()
89 	{ .compatible = "operating-points-v2", },
102  * of_device_alloc - Allocate and initialize an of_device
130 		dev->num_resources = num_reg;  in of_device_alloc()
131 		dev->resource = res;  in of_device_alloc()
139 	device_set_node(&dev->dev, of_fwnode_handle(of_node_get(np)));  in of_device_alloc()
140 	dev->dev.parent = parent ? : &platform_bus;  in of_device_alloc()
143 		dev_set_name(&dev->dev, "%s", bus_id);  in of_device_alloc()
145 		of_device_make_bus_id(&dev->dev);  in of_device_alloc()
152  * of_platform_device_create_pdata - Alloc, initialize and register an of_device
179 	dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);  in of_platform_device_create_pdata()
180 	if (!dev->dev.dma_mask)  in of_platform_device_create_pdata()
181 		dev->dev.dma_mask = &dev->dev.coherent_dma_mask;  in of_platform_device_create_pdata()
182 	dev->dev.bus = &platform_bus_type;  in of_platform_device_create_pdata()
183 	dev->dev.platform_data = platform_data;  in of_platform_device_create_pdata()
184 	of_msi_configure(&dev->dev, dev->dev.of_node);  in of_platform_device_create_pdata()
199  * of_platform_device_create - Alloc, initialize and register an of_device
235 	dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);  in of_amba_device_create()
236 	dev->dev.dma_mask = &dev->dev.coherent_dma_mask;  in of_amba_device_create()
239 	device_set_node(&dev->dev, of_fwnode_handle(node));  in of_amba_device_create()
240 	dev->dev.parent = parent ? : &platform_bus;  in of_amba_device_create()
241 	dev->dev.platform_data = platform_data;  in of_amba_device_create()
243 		dev_set_name(&dev->dev, "%s", bus_id);  in of_amba_device_create()
245 		of_device_make_bus_id(&dev->dev);  in of_amba_device_create()
248 	of_property_read_u32(node, "arm,primecell-periphid", &dev->periphid);  in of_amba_device_create()
250 	ret = of_address_to_resource(node, 0, &dev->res);  in of_amba_device_create()
283  * of_dev_lookup() - Given a device node, lookup the preferred Linux name
296 	for (; auxdata->compatible; auxdata++) {  in of_dev_lookup()
297 		if (!of_device_is_compatible(np, auxdata->compatible))  in of_dev_lookup()
301 			if (res.start != auxdata->phys_addr)  in of_dev_lookup()
303 		pr_debug("%pOF: devname=%s\n", np, auxdata->name);  in of_dev_lookup()
312 	for (; auxdata->compatible; auxdata++) {  in of_dev_lookup()
313 		if (!of_device_is_compatible(np, auxdata->compatible))  in of_dev_lookup()
315 		if (!auxdata->phys_addr && !auxdata->name) {  in of_dev_lookup()
325  * of_platform_bus_create() - Create a device for a node and its children.
329  * @parent: parent for new device, or NULL for top level.
348 		pr_debug("%s() - skipping %pOF, no compatible prop\n",  in of_platform_bus_create()
355 		pr_debug("%s() - skipping %pOF node\n", __func__, bus);  in of_platform_bus_create()
360 		pr_debug("%s() - skipping %pOF, already populated\n",  in of_platform_bus_create()
367 		bus_id = auxdata->name;  in of_platform_bus_create()
368 		platform_data = auxdata->platform_data;  in of_platform_bus_create()
386 		rc = of_platform_bus_create(child, matches, lookup, &dev->dev, strict);  in of_platform_bus_create()
395  * of_platform_bus_probe() - Probe the device-tree for platform buses
396  * @root: parent of the first level to probe or NULL for the root of the tree
412 		return -EINVAL;  in of_platform_bus_probe()
436  * of_platform_populate() - Populate platform_devices from device tree data
437  * @root: parent of the first level to probe or NULL for the root of the tree
463 		return -EINVAL;  in of_platform_populate()
494 	{ .compatible = "qcom,rmtfs-mem" },
495 	{ .compatible = "qcom,cmd-db" },
496 	{ .compatible = "qcom,smem" },
498 	{ .compatible = "nvmem-rmem" },
499 	{ .compatible = "google,open-dice" },
516 		if (of_property_present(of_chosen, "linux,bootx-noscreen")) {  in of_platform_default_populate_init()
524 			dev = platform_device_alloc("bootx-noscreen", 0);  in of_platform_default_populate_init()
526 				return -ENOMEM;  in of_platform_default_populate_init()
541 			    !of_get_property(node, "linux,boot-display", NULL))  in of_platform_default_populate_init()
543 			dev = of_platform_device_create(node, "of-display", NULL);  in of_platform_default_populate_init()
546 				return -ENOMEM;  in of_platform_default_populate_init()
553 			const char *of_display_format = "of-display.%d";  in of_platform_default_populate_init()
565 		 * platform_devices for every node in /reserved-memory with a  in of_platform_default_populate_init()
577 		node = of_get_compatible_child(of_chosen, "simple-framebuffer");  in of_platform_default_populate_init()
580 			 * Since a "simple-framebuffer" device is already added  in of_platform_default_populate_init()
612 	if (!dev->of_node || !of_node_check_flag(dev->of_node, OF_POPULATED))  in of_platform_device_destroy()
616 	if (of_node_check_flag(dev->of_node, OF_POPULATED_BUS))  in of_platform_device_destroy()
619 	of_node_clear_flag(dev->of_node, OF_POPULATED);  in of_platform_device_destroy()
620 	of_node_clear_flag(dev->of_node, OF_POPULATED_BUS);  in of_platform_device_destroy()
622 	if (dev->bus == &platform_bus_type)  in of_platform_device_destroy()
625 	else if (dev->bus == &amba_bustype)  in of_platform_device_destroy()
634  * of_platform_depopulate() - Remove devices populated from device tree
640  * leaving others - eg. manually created - unharmed).
644 	if (parent->of_node && of_node_check_flag(parent->of_node, OF_POPULATED_BUS)) {  in of_platform_depopulate()
646 		of_node_clear_flag(parent->of_node, OF_POPULATED_BUS);  in of_platform_depopulate()
657  * devm_of_platform_populate() - Populate platform_devices from device tree data
671 		return -EINVAL;  in devm_of_platform_populate()
676 		return -ENOMEM;  in devm_of_platform_populate()
678 	ret = of_platform_populate(dev->of_node, NULL, NULL, dev);  in devm_of_platform_populate()
703  * devm_of_platform_depopulate() - Remove devices populated from device tree
709  * leaving others - eg. manually created - unharmed).
733 		parent = rd->dn->parent;  in of_platform_notify()
740 		if (of_node_check_flag(rd->dn, OF_POPULATED))  in of_platform_notify()
747 		rd->dn->fwnode.flags &= ~FWNODE_FLAG_NOT_DEVICE;  in of_platform_notify()
750 		pdev = of_platform_device_create(rd->dn, NULL,  in of_platform_notify()
751 				pdev_parent ? &pdev_parent->dev : NULL);  in of_platform_notify()
756 					__func__, rd->dn);  in of_platform_notify()
758 			return notifier_from_errno(-EINVAL);  in of_platform_notify()
765 		if (!of_node_check_flag(rd->dn, OF_POPULATED))  in of_platform_notify()
769 		pdev = of_find_device_by_node(rd->dn);  in of_platform_notify()
774 		of_platform_device_destroy(&pdev->dev, &children_left);  in of_platform_notify()