| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp. |
| * <benh@kernel.crashing.org> |
| * and Arnd Bergmann, IBM Corp. |
| * Merged from powerpc/kernel/of_platform.c and |
| * sparc{,64}/kernel/of_device.c by Stephen Rothwell |
| */ |
| |
| #define pr_fmt(fmt) "OF: " fmt |
| |
| #include <linux/errno.h> |
| #include <linux/module.h> |
| #include <linux/amba/bus.h> |
| #include <linux/device.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/slab.h> |
| #include <linux/of_address.h> |
| #include <linux/of_device.h> |
| #include <linux/of_iommu.h> |
| #include <linux/of_irq.h> |
| #include <linux/of_platform.h> |
| #include <linux/platform_device.h> |
| |
| const struct of_device_id of_default_bus_match_table[] = { |
| { .compatible = "simple-bus", }, |
| { .compatible = "simple-mfd", }, |
| { .compatible = "isa", }, |
| #ifdef CONFIG_ARM_AMBA |
| { .compatible = "arm,amba-bus", }, |
| #endif /* CONFIG_ARM_AMBA */ |
| {} /* Empty terminated list */ |
| }; |
| |
| static const struct of_device_id of_skipped_node_table[] = { |
| { .compatible = "operating-points-v2", }, |
| {} /* Empty terminated list */ |
| }; |
| |
| static int of_dev_node_match(struct device *dev, void *data) |
| { |
| return dev->of_node == data; |
| } |
| |
| /** |
| * of_find_device_by_node - Find the platform_device associated with a node |
| * @np: Pointer to device tree node |
| * |
| * Takes a reference to the embedded struct device which needs to be dropped |
| * after use. |
| * |
| * Returns platform_device pointer, or NULL if not found |
| */ |
| struct platform_device *of_find_device_by_node(struct device_node *np) |
| { |
| struct device *dev; |
| |
| dev = bus_find_device(&platform_bus_type, NULL, np, of_dev_node_match); |
| return dev ? to_platform_device(dev) : NULL; |
| } |
| EXPORT_SYMBOL(of_find_device_by_node); |
| |
| #ifdef CONFIG_OF_ADDRESS |
| /* |
| * The following routines scan a subtree and registers a device for |
| * each applicable node. |
| * |
| * Note: sparc doesn't use these routines because it has a different |
| * mechanism for creating devices from device tree nodes. |
| */ |
| |
| /** |
| * of_device_make_bus_id - Use the device node data to assign a unique name |
| * @dev: pointer to device structure that is linked to a device tree node |
| * |
| * This routine will first try using the translated bus address to |
| * derive a unique name. If it cannot, then it will prepend names from |
| * parent nodes until a unique name can be derived. |
| */ |
| static void of_device_make_bus_id(struct device *dev) |
| { |
| struct device_node *node = dev->of_node; |
| const __be32 *reg; |
| u64 addr; |
| |
| /* Construct the name, using parent nodes if necessary to ensure uniqueness */ |
| while (node->parent) { |
| /* |
| * If the address can be translated, then that is as much |
| * uniqueness as we need. Make it the first component and return |
| */ |
| reg = of_get_property(node, "reg", NULL); |
| if (reg && (addr = of_translate_address(node, reg)) != OF_BAD_ADDR) { |
| dev_set_name(dev, dev_name(dev) ? "%llx.%pOFn:%s" : "%llx.%pOFn", |
| (unsigned long long)addr, node, |
| dev_name(dev)); |
| return; |
| } |
| |
| /* format arguments only used if dev_name() resolves to NULL */ |
| dev_set_name(dev, dev_name(dev) ? "%s:%s" : "%s", |
| kbasename(node->full_name), dev_name(dev)); |
| node = node->parent; |
| } |
| } |
| |
| /** |
| * of_device_alloc - Allocate and initialize an of_device |
| * @np: device node to assign to device |
| * @bus_id: Name to assign to the device. May be null to use default name. |
| * @parent: Parent device. |
| */ |
| struct platform_device *of_device_alloc(struct device_node *np, |
| const char *bus_id, |
| struct device *parent) |
| { |
| struct platform_device *dev; |
| int rc, i, num_reg = 0, num_irq; |
| struct resource *res, temp_res; |
| |
| dev = platform_device_alloc("", PLATFORM_DEVID_NONE); |
| if (!dev) |
| return NULL; |
| |
| /* count the io and irq resources */ |
| while (of_address_to_resource(np, num_reg, &temp_res) == 0) |
| num_reg++; |
| num_irq = of_irq_count(np); |
| |
| /* Populate the resource table */ |
| if (num_irq || num_reg) { |
| res = kcalloc(num_irq + num_reg, sizeof(*res), GFP_KERNEL); |
| if (!res) { |
| platform_device_put(dev); |
| return NULL; |
| } |
| |
| dev->num_resources = num_reg + num_irq; |
| dev->resource = res; |
| for (i = 0; i < num_reg; i++, res++) { |
| rc = of_address_to_resource(np, i, res); |
| WARN_ON(rc); |
| } |
| if (of_irq_to_resource_table(np, res, num_irq) != num_irq) |
| pr_debug("not all legacy IRQ resources mapped for %pOFn\n", |
| np); |
| } |
| |
| dev->dev.of_node = of_node_get(np); |
| dev->dev.fwnode = &np->fwnode; |
| dev->dev.parent = parent ? : &platform_bus; |
| |
| if (bus_id) |
| dev_set_name(&dev->dev, "%s", bus_id); |
| else |
| of_device_make_bus_id(&dev->dev); |
| |
| return dev; |
| } |
| EXPORT_SYMBOL(of_device_alloc); |
| |
| /** |
| * of_platform_device_create_pdata - Alloc, initialize and register an of_device |
| * @np: pointer to node to create device for |
| * @bus_id: name to assign device |
| * @platform_data: pointer to populate platform_data pointer with |
| * @parent: Linux device model parent device. |
| * |
| * Returns pointer to created platform device, or NULL if a device was not |
| * registered. Unavailable devices will not get registered. |
| */ |
| static struct platform_device *of_platform_device_create_pdata( |
| struct device_node *np, |
| const char *bus_id, |
| void *platform_data, |
| struct device *parent) |
| { |
| struct platform_device *dev; |
| |
| if (!of_device_is_available(np) || |
| of_node_test_and_set_flag(np, OF_POPULATED)) |
| return NULL; |
| |
| dev = of_device_alloc(np, bus_id, parent); |
| if (!dev) |
| goto err_clear_flag; |
| |
| dev->dev.coherent_dma_mask = DMA_BIT_MASK(32); |
| if (!dev->dev.dma_mask) |
| dev->dev.dma_mask = &dev->dev.coherent_dma_mask; |
| dev->dev.bus = &platform_bus_type; |
| dev->dev.platform_data = platform_data; |
| of_msi_configure(&dev->dev, dev->dev.of_node); |
| |
| if (of_device_add(dev) != 0) { |
| platform_device_put(dev); |
| goto err_clear_flag; |
| } |
| |
| return dev; |
| |
| err_clear_flag: |
| of_node_clear_flag(np, OF_POPULATED); |
| return NULL; |
| } |
| |
| /** |
| * of_platform_device_create - Alloc, initialize and register an of_device |
| * @np: pointer to node to create device for |
| * @bus_id: name to assign device |
| * @parent: Linux device model parent device. |
| * |
| * Returns pointer to created platform device, or NULL if a device was not |
| * registered. Unavailable devices will not get registered. |
| */ |
| struct platform_device *of_platform_device_create(struct device_node *np, |
| const char *bus_id, |
| struct device *parent) |
| { |
| return of_platform_device_create_pdata(np, bus_id, NULL, parent); |
| } |
| EXPORT_SYMBOL(of_platform_device_create); |
| |
| #ifdef CONFIG_ARM_AMBA |
| static struct amba_device *of_amba_device_create(struct device_node *node, |
| const char *bus_id, |
| void *platform_data, |
| struct device *parent) |
| { |
| struct amba_device *dev; |
| const void *prop; |
| int i, ret; |
| |
| pr_debug("Creating amba device %pOF\n", node); |
| |
| if (!of_device_is_available(node) || |
| of_node_test_and_set_flag(node, OF_POPULATED)) |
| return NULL; |
| |
| dev = amba_device_alloc(NULL, 0, 0); |
| if (!dev) |
| goto err_clear_flag; |
| |
| /* AMBA devices only support a single DMA mask */ |
| dev->dev.coherent_dma_mask = DMA_BIT_MASK(32); |
| dev->dev.dma_mask = &dev->dev.coherent_dma_mask; |
| |
| /* setup generic device info */ |
| dev->dev.of_node = of_node_get(node); |
| dev->dev.fwnode = &node->fwnode; |
| dev->dev.parent = parent ? : &platform_bus; |
| dev->dev.platform_data = platform_data; |
| if (bus_id) |
| dev_set_name(&dev->dev, "%s", bus_id); |
| else |
| of_device_make_bus_id(&dev->dev); |
| |
| /* Allow the HW Peripheral ID to be overridden */ |
| prop = of_get_property(node, "arm,primecell-periphid", NULL); |
| if (prop) |
| dev->periphid = of_read_ulong(prop, 1); |
| |
| /* Decode the IRQs and address ranges */ |
| for (i = 0; i < AMBA_NR_IRQS; i++) |
| dev->irq[i] = irq_of_parse_and_map(node, i); |
| |
| ret = of_address_to_resource(node, 0, &dev->res); |
| if (ret) { |
| pr_err("amba: of_address_to_resource() failed (%d) for %pOF\n", |
| ret, node); |
| goto err_free; |
| } |
| |
| ret = amba_device_add(dev, &iomem_resource); |
| if (ret) { |
| pr_err("amba_device_add() failed (%d) for %pOF\n", |
| ret, node); |
| goto err_free; |
| } |
| |
| return dev; |
| |
| err_free: |
| amba_device_put(dev); |
| err_clear_flag: |
| of_node_clear_flag(node, OF_POPULATED); |
| return NULL; |
| } |
| #else /* CONFIG_ARM_AMBA */ |
| static struct amba_device *of_amba_device_create(struct device_node *node, |
| const char *bus_id, |
| void *platform_data, |
| struct device *parent) |
| { |
| return NULL; |
| } |
| #endif /* CONFIG_ARM_AMBA */ |
| |
| /** |
| * of_devname_lookup() - Given a device node, lookup the preferred Linux name |
| */ |
| static const struct of_dev_auxdata *of_dev_lookup(const struct of_dev_auxdata *lookup, |
| struct device_node *np) |
| { |
| const struct of_dev_auxdata *auxdata; |
| struct resource res; |
| int compatible = 0; |
| |
| if (!lookup) |
| return NULL; |
| |
| auxdata = lookup; |
| for (; auxdata->compatible; auxdata++) { |
| if (!of_device_is_compatible(np, auxdata->compatible)) |
| continue; |
| compatible++; |
| if (!of_address_to_resource(np, 0, &res)) |
| if (res.start != auxdata->phys_addr) |
| continue; |
| pr_debug("%pOF: devname=%s\n", np, auxdata->name); |
| return auxdata; |
| } |
| |
| if (!compatible) |
| return NULL; |
| |
| /* Try compatible match if no phys_addr and name are specified */ |
| auxdata = lookup; |
| for (; auxdata->compatible; auxdata++) { |
| if (!of_device_is_compatible(np, auxdata->compatible)) |
| continue; |
| if (!auxdata->phys_addr && !auxdata->name) { |
| pr_debug("%pOF: compatible match\n", np); |
| return auxdata; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| /** |
| * of_platform_bus_create() - Create a device for a node and its children. |
| * @bus: device node of the bus to instantiate |
| * @matches: match table for bus nodes |
| * @lookup: auxdata table for matching id and platform_data with device nodes |
| * @parent: parent for new device, or NULL for top level. |
| * @strict: require compatible property |
| * |
| * Creates a platform_device for the provided device_node, and optionally |
| * recursively create devices for all the child nodes. |
| */ |
| static int of_platform_bus_create(struct device_node *bus, |
| const struct of_device_id *matches, |
| const struct of_dev_auxdata *lookup, |
| struct device *parent, bool strict) |
| { |
| const struct of_dev_auxdata *auxdata; |
| struct device_node *child; |
| struct platform_device *dev; |
| const char *bus_id = NULL; |
| void *platform_data = NULL; |
| int rc = 0; |
| |
| /* Make sure it has a compatible property */ |
| if (strict && (!of_get_property(bus, "compatible", NULL))) { |
| pr_debug("%s() - skipping %pOF, no compatible prop\n", |
| __func__, bus); |
| return 0; |
| } |
| |
| /* Skip nodes for which we don't want to create devices */ |
| if (unlikely(of_match_node(of_skipped_node_table, bus))) { |
| pr_debug("%s() - skipping %pOF node\n", __func__, bus); |
| return 0; |
| } |
| |
| if (of_node_check_flag(bus, OF_POPULATED_BUS)) { |
| pr_debug("%s() - skipping %pOF, already populated\n", |
| __func__, bus); |
| return 0; |
| } |
| |
| auxdata = of_dev_lookup(lookup, bus); |
| if (auxdata) { |
| bus_id = auxdata->name; |
| platform_data = auxdata->platform_data; |
| } |
| |
| if (of_device_is_compatible(bus, "arm,primecell")) { |
| /* |
| * Don't return an error here to keep compatibility with older |
| * device tree files. |
| */ |
| of_amba_device_create(bus, bus_id, platform_data, parent); |
| return 0; |
| } |
| |
| dev = of_platform_device_create_pdata(bus, bus_id, platform_data, parent); |
| if (!dev || !of_match_node(matches, bus)) |
| return 0; |
| |
| for_each_child_of_node(bus, child) { |
| pr_debug(" create child: %pOF\n", child); |
| rc = of_platform_bus_create(child, matches, lookup, &dev->dev, strict); |
| if (rc) { |
| of_node_put(child); |
| break; |
| } |
| } |
| of_node_set_flag(bus, OF_POPULATED_BUS); |
| return rc; |
| } |
| |
| /** |
| * of_platform_bus_probe() - Probe the device-tree for platform buses |
| * @root: parent of the first level to probe or NULL for the root of the tree |
| * @matches: match table for bus nodes |
| * @parent: parent to hook devices from, NULL for toplevel |
| * |
| * Note that children of the provided root are not instantiated as devices |
| * unless the specified root itself matches the bus list and is not NULL. |
| */ |
| int of_platform_bus_probe(struct device_node *root, |
| const struct of_device_id *matches, |
| struct device *parent) |
| { |
| struct device_node *child; |
| int rc = 0; |
| |
| root = root ? of_node_get(root) : of_find_node_by_path("/"); |
| if (!root) |
| return -EINVAL; |
| |
| pr_debug("%s()\n", __func__); |
| pr_debug(" starting at: %pOF\n", root); |
| |
| /* Do a self check of bus type, if there's a match, create children */ |
| if (of_match_node(matches, root)) { |
| rc = of_platform_bus_create(root, matches, NULL, parent, false); |
| } else for_each_child_of_node(root, child) { |
| if (!of_match_node(matches, child)) |
| continue; |
| rc = of_platform_bus_create(child, matches, NULL, parent, false); |
| if (rc) { |
| of_node_put(child); |
| break; |
| } |
| } |
| |
| of_node_put(root); |
| return rc; |
| } |
| EXPORT_SYMBOL(of_platform_bus_probe); |
| |
| /** |
| * of_platform_populate() - Populate platform_devices from device tree data |
| * @root: parent of the first level to probe or NULL for the root of the tree |
| * @matches: match table, NULL to use the default |
| * @lookup: auxdata table for matching id and platform_data with device nodes |
| * @parent: parent to hook devices from, NULL for toplevel |
| * |
| * Similar to of_platform_bus_probe(), this function walks the device tree |
| * and creates devices from nodes. It differs in that it follows the modern |
| * convention of requiring all device nodes to have a 'compatible' property, |
| * and it is suitable for creating devices which are children of the root |
| * node (of_platform_bus_probe will only create children of the root which |
| * are selected by the @matches argument). |
| * |
| * New board support should be using this function instead of |
| * of_platform_bus_probe(). |
| * |
| * Returns 0 on success, < 0 on failure. |
| */ |
| int of_platform_populate(struct device_node *root, |
| const struct of_device_id *matches, |
| const struct of_dev_auxdata *lookup, |
| struct device *parent) |
| { |
| struct device_node *child; |
| int rc = 0; |
| |
| root = root ? of_node_get(root) : of_find_node_by_path("/"); |
| if (!root) |
| return -EINVAL; |
| |
| pr_debug("%s()\n", __func__); |
| pr_debug(" starting at: %pOF\n", root); |
| |
| device_links_supplier_sync_state_pause(); |
| for_each_child_of_node(root, child) { |
| rc = of_platform_bus_create(child, matches, lookup, parent, true); |
| if (rc) { |
| of_node_put(child); |
| break; |
| } |
| } |
| device_links_supplier_sync_state_resume(); |
| |
| of_node_set_flag(root, OF_POPULATED_BUS); |
| |
| of_node_put(root); |
| return rc; |
| } |
| EXPORT_SYMBOL_GPL(of_platform_populate); |
| |
| int of_platform_default_populate(struct device_node *root, |
| const struct of_dev_auxdata *lookup, |
| struct device *parent) |
| { |
| return of_platform_populate(root, of_default_bus_match_table, lookup, |
| parent); |
| } |
| EXPORT_SYMBOL_GPL(of_platform_default_populate); |
| |
| #ifndef CONFIG_PPC |
| static const struct of_device_id reserved_mem_matches[] = { |
| { .compatible = "qcom,rmtfs-mem" }, |
| { .compatible = "qcom,cmd-db" }, |
| { .compatible = "ramoops" }, |
| {} |
| }; |
| |
| static int __init of_platform_default_populate_init(void) |
| { |
| struct device_node *node; |
| |
| if (!of_have_populated_dt()) |
| return -ENODEV; |
| |
| device_links_supplier_sync_state_pause(); |
| /* |
| * Handle certain compatibles explicitly, since we don't want to create |
| * platform_devices for every node in /reserved-memory with a |
| * "compatible", |
| */ |
| for_each_matching_node(node, reserved_mem_matches) |
| of_platform_device_create(node, NULL, NULL); |
| |
| node = of_find_node_by_path("/firmware"); |
| if (node) { |
| of_platform_populate(node, NULL, NULL, NULL); |
| of_node_put(node); |
| } |
| |
| /* Populate everything else. */ |
| of_platform_default_populate(NULL, NULL, NULL); |
| |
| return 0; |
| } |
| arch_initcall_sync(of_platform_default_populate_init); |
| |
| static int __init of_platform_sync_state_init(void) |
| { |
| if (of_have_populated_dt()) |
| device_links_supplier_sync_state_resume(); |
| return 0; |
| } |
| late_initcall_sync(of_platform_sync_state_init); |
| #endif |
| |
| int of_platform_device_destroy(struct device *dev, void *data) |
| { |
| /* Do not touch devices not populated from the device tree */ |
| if (!dev->of_node || !of_node_check_flag(dev->of_node, OF_POPULATED)) |
| return 0; |
| |
| /* Recurse for any nodes that were treated as busses */ |
| if (of_node_check_flag(dev->of_node, OF_POPULATED_BUS)) |
| device_for_each_child(dev, NULL, of_platform_device_destroy); |
| |
| of_node_clear_flag(dev->of_node, OF_POPULATED); |
| of_node_clear_flag(dev->of_node, OF_POPULATED_BUS); |
| |
| if (dev->bus == &platform_bus_type) |
| platform_device_unregister(to_platform_device(dev)); |
| #ifdef CONFIG_ARM_AMBA |
| else if (dev->bus == &amba_bustype) |
| amba_device_unregister(to_amba_device(dev)); |
| #endif |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(of_platform_device_destroy); |
| |
| /** |
| * of_platform_depopulate() - Remove devices populated from device tree |
| * @parent: device which children will be removed |
| * |
| * Complementary to of_platform_populate(), this function removes children |
| * of the given device (and, recurrently, their children) that have been |
| * created from their respective device tree nodes (and only those, |
| * leaving others - eg. manually created - unharmed). |
| */ |
| void of_platform_depopulate(struct device *parent) |
| { |
| if (parent->of_node && of_node_check_flag(parent->of_node, OF_POPULATED_BUS)) { |
| device_for_each_child(parent, NULL, of_platform_device_destroy); |
| of_node_clear_flag(parent->of_node, OF_POPULATED_BUS); |
| } |
| } |
| EXPORT_SYMBOL_GPL(of_platform_depopulate); |
| |
| static void devm_of_platform_populate_release(struct device *dev, void *res) |
| { |
| of_platform_depopulate(*(struct device **)res); |
| } |
| |
| /** |
| * devm_of_platform_populate() - Populate platform_devices from device tree data |
| * @dev: device that requested to populate from device tree data |
| * |
| * Similar to of_platform_populate(), but will automatically call |
| * of_platform_depopulate() when the device is unbound from the bus. |
| * |
| * Returns 0 on success, < 0 on failure. |
| */ |
| int devm_of_platform_populate(struct device *dev) |
| { |
| struct device **ptr; |
| int ret; |
| |
| if (!dev) |
| return -EINVAL; |
| |
| ptr = devres_alloc(devm_of_platform_populate_release, |
| sizeof(*ptr), GFP_KERNEL); |
| if (!ptr) |
| return -ENOMEM; |
| |
| ret = of_platform_populate(dev->of_node, NULL, NULL, dev); |
| if (ret) { |
| devres_free(ptr); |
| } else { |
| *ptr = dev; |
| devres_add(dev, ptr); |
| } |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(devm_of_platform_populate); |
| |
| static int devm_of_platform_match(struct device *dev, void *res, void *data) |
| { |
| struct device **ptr = res; |
| |
| if (!ptr) { |
| WARN_ON(!ptr); |
| return 0; |
| } |
| |
| return *ptr == data; |
| } |
| |
| /** |
| * devm_of_platform_depopulate() - Remove devices populated from device tree |
| * @dev: device that requested to depopulate from device tree data |
| * |
| * Complementary to devm_of_platform_populate(), this function removes children |
| * of the given device (and, recurrently, their children) that have been |
| * created from their respective device tree nodes (and only those, |
| * leaving others - eg. manually created - unharmed). |
| */ |
| void devm_of_platform_depopulate(struct device *dev) |
| { |
| int ret; |
| |
| ret = devres_release(dev, devm_of_platform_populate_release, |
| devm_of_platform_match, dev); |
| |
| WARN_ON(ret); |
| } |
| EXPORT_SYMBOL_GPL(devm_of_platform_depopulate); |
| |
| #ifdef CONFIG_OF_DYNAMIC |
| static int of_platform_notify(struct notifier_block *nb, |
| unsigned long action, void *arg) |
| { |
| struct of_reconfig_data *rd = arg; |
| struct platform_device *pdev_parent, *pdev; |
| bool children_left; |
| |
| switch (of_reconfig_get_state_change(action, rd)) { |
| case OF_RECONFIG_CHANGE_ADD: |
| /* verify that the parent is a bus */ |
| if (!of_node_check_flag(rd->dn->parent, OF_POPULATED_BUS)) |
| return NOTIFY_OK; /* not for us */ |
| |
| /* already populated? (driver using of_populate manually) */ |
| if (of_node_check_flag(rd->dn, OF_POPULATED)) |
| return NOTIFY_OK; |
| |
| /* pdev_parent may be NULL when no bus platform device */ |
| pdev_parent = of_find_device_by_node(rd->dn->parent); |
| pdev = of_platform_device_create(rd->dn, NULL, |
| pdev_parent ? &pdev_parent->dev : NULL); |
| of_dev_put(pdev_parent); |
| |
| if (pdev == NULL) { |
| pr_err("%s: failed to create for '%pOF'\n", |
| __func__, rd->dn); |
| /* of_platform_device_create tosses the error code */ |
| return notifier_from_errno(-EINVAL); |
| } |
| break; |
| |
| case OF_RECONFIG_CHANGE_REMOVE: |
| |
| /* already depopulated? */ |
| if (!of_node_check_flag(rd->dn, OF_POPULATED)) |
| return NOTIFY_OK; |
| |
| /* find our device by node */ |
| pdev = of_find_device_by_node(rd->dn); |
| if (pdev == NULL) |
| return NOTIFY_OK; /* no? not meant for us */ |
| |
| /* unregister takes one ref away */ |
| of_platform_device_destroy(&pdev->dev, &children_left); |
| |
| /* and put the reference of the find */ |
| of_dev_put(pdev); |
| break; |
| } |
| |
| return NOTIFY_OK; |
| } |
| |
| static struct notifier_block platform_of_notifier = { |
| .notifier_call = of_platform_notify, |
| }; |
| |
| void of_platform_register_reconfig_notifier(void) |
| { |
| WARN_ON(of_reconfig_notifier_register(&platform_of_notifier)); |
| } |
| #endif /* CONFIG_OF_DYNAMIC */ |
| |
| #endif /* CONFIG_OF_ADDRESS */ |