Lines Matching +full:platform +full:- +full:level
1 // SPDX-License-Identifier: GPL-2.0
3 * platform.c - platform 'pseudo' bus for legacy devices
5 * Copyright (c) 2002-3 Patrick Mochel
6 * Copyright (c) 2002-3 Open Source Development Labs
8 * Please see Documentation/driver-api/driver-model/platform.rst for more
20 #include <linux/dma-mapping.h>
28 #include <linux/clk/clk-conf.h>
41 .init_name = "platform",
46 * platform_get_resource - get a resource for a device
47 * @dev: platform device
58 for (i = 0; i < dev->num_resources; i++) { in platform_get_resource()
59 struct resource *r = &dev->resource[i]; in platform_get_resource()
61 if (type == resource_type(r) && num-- == 0) in platform_get_resource()
73 for (i = 0; i < dev->num_resources; i++) { in platform_get_mem_or_io()
74 struct resource *r = &dev->resource[i]; in platform_get_mem_or_io()
76 if ((resource_type(r) & (IORESOURCE_MEM|IORESOURCE_IO)) && num-- == 0) in platform_get_mem_or_io()
85 * devm_platform_get_and_ioremap_resource - call devm_ioremap_resource() for a
86 * platform device and get resource
88 * @pdev: platform device to use both for memory resource lookup as well as
105 return devm_ioremap_resource(&pdev->dev, r); in devm_platform_get_and_ioremap_resource()
110 * devm_platform_ioremap_resource - call devm_ioremap_resource() for a platform
113 * @pdev: platform device to use both for memory resource lookup as well as
128 * devm_platform_ioremap_resource_byname - call devm_ioremap_resource for
129 * a platform device, retrieve the
132 * @pdev: platform device to use both for memory resource lookup as well as
146 return devm_ioremap_resource(&pdev->dev, res); in devm_platform_ioremap_resource_byname()
152 * platform_get_irq_optional - get an optional IRQ for a device
153 * @dev: platform device
156 * Gets an IRQ for a platform device. Device drivers should check the return
167 * Return: non-zero IRQ number on success, negative error number on failure.
174 if (!dev || num >= dev->archdata.num_irqs) in platform_get_irq_optional()
176 ret = dev->archdata.irqs[num]; in platform_get_irq_optional()
181 if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) { in platform_get_irq_optional()
182 ret = of_irq_get(dev->dev.of_node, num); in platform_get_irq_optional()
183 if (ret > 0 || ret == -EPROBE_DEFER) in platform_get_irq_optional()
188 if (has_acpi_companion(&dev->dev)) { in platform_get_irq_optional()
189 if (r && r->flags & IORESOURCE_DISABLED) { in platform_get_irq_optional()
190 ret = acpi_irq_get(ACPI_HANDLE(&dev->dev), num, r); in platform_get_irq_optional()
199 * IORESOURCE_BITS correspond 1-to-1 to the IRQF_TRIGGER* in platform_get_irq_optional()
202 if (r && r->flags & IORESOURCE_BITS) { in platform_get_irq_optional()
205 irqd = irq_get_irq_data(r->start); in platform_get_irq_optional()
208 irqd_set_trigger_type(irqd, r->flags & IORESOURCE_BITS); in platform_get_irq_optional()
212 ret = r->start; in platform_get_irq_optional()
223 if (num == 0 && has_acpi_companion(&dev->dev)) { in platform_get_irq_optional()
224 ret = acpi_dev_gpio_irq_get(ACPI_COMPANION(&dev->dev), num); in platform_get_irq_optional()
225 /* Our callers expect -ENXIO for missing IRQs. */ in platform_get_irq_optional()
226 if (ret >= 0 || ret == -EPROBE_DEFER) in platform_get_irq_optional()
232 ret = -ENXIO; in platform_get_irq_optional()
240 * platform_get_irq - get an IRQ for a device
241 * @dev: platform device
244 * Gets an IRQ for a platform device and prints an error message if finding the
254 * Return: non-zero IRQ number on success, negative error number on failure.
261 if (ret < 0 && ret != -EPROBE_DEFER) in platform_get_irq()
262 dev_err(&dev->dev, "IRQ index %u not found\n", num); in platform_get_irq()
269 * platform_irq_count - Count the number of IRQs a platform device uses
270 * @dev: platform device
272 * Return: Number of IRQs a platform device uses or EPROBE_DEFER
281 if (ret == -EPROBE_DEFER) in platform_irq_count()
308 for (i = 0; i < ptr->count; i++) { in devm_platform_get_irqs_affinity_release()
309 irq_dispose_mapping(ptr->irq[i]); in devm_platform_get_irqs_affinity_release()
317 * devm_platform_get_irqs_affinity - devm method to get a set of IRQs for a
319 * @dev: platform device pointer
325 * Gets a set of IRQs for a platform device, and updates IRQ afffinty according
342 return -EPERM; in devm_platform_get_irqs_affinity()
345 return -ERANGE; in devm_platform_get_irqs_affinity()
352 return -ENOSPC; in devm_platform_get_irqs_affinity()
356 return -ENOSPC; in devm_platform_get_irqs_affinity()
365 return -ENOMEM; in devm_platform_get_irqs_affinity()
367 ptr->count = nvec; in devm_platform_get_irqs_affinity()
375 ptr->irq[i] = irq; in devm_platform_get_irqs_affinity()
380 ret = -ENOMEM; in devm_platform_get_irqs_affinity()
385 ret = irq_update_affinity_desc(ptr->irq[i], &desc[i]); in devm_platform_get_irqs_affinity()
387 dev_err(&dev->dev, "failed to update irq%d affinity descriptor (%d)\n", in devm_platform_get_irqs_affinity()
388 ptr->irq[i], ret); in devm_platform_get_irqs_affinity()
393 devres_add(&dev->dev, ptr); in devm_platform_get_irqs_affinity()
397 *irqs = ptr->irq; in devm_platform_get_irqs_affinity()
410 * platform_get_resource_byname - get a resource for a device by name
411 * @dev: platform device
421 for (i = 0; i < dev->num_resources; i++) { in platform_get_resource_byname()
422 struct resource *r = &dev->resource[i]; in platform_get_resource_byname()
424 if (unlikely(!r->name)) in platform_get_resource_byname()
427 if (type == resource_type(r) && !strcmp(r->name, name)) in platform_get_resource_byname()
440 if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) { in __platform_get_irq_byname()
441 ret = of_irq_get_byname(dev->dev.of_node, name); in __platform_get_irq_byname()
442 if (ret > 0 || ret == -EPROBE_DEFER) in __platform_get_irq_byname()
448 WARN(r->start == 0, "0 is an invalid IRQ number\n"); in __platform_get_irq_byname()
449 return r->start; in __platform_get_irq_byname()
452 return -ENXIO; in __platform_get_irq_byname()
456 * platform_get_irq_byname - get an IRQ for a device by name
457 * @dev: platform device
462 * Return: non-zero IRQ number on success, negative error number on failure.
469 if (ret < 0 && ret != -EPROBE_DEFER) in platform_get_irq_byname()
470 dev_err(&dev->dev, "IRQ %s not found\n", name); in platform_get_irq_byname()
477 * platform_get_irq_byname_optional - get an optional IRQ for a device by name
478 * @dev: platform device
484 * Return: non-zero IRQ number on success, negative error number on failure.
494 * platform_add_devices - add a numbers of platform devices
495 * @devs: array of platform devices to add
496 * @num: number of platform devices in array
505 while (--i >= 0) in platform_add_devices()
521 * Set up default DMA mask for platform devices if the they weren't
526 pdev->dev.dma_parms = &pdev->dma_parms; in setup_pdev_dma_masks()
528 if (!pdev->dev.coherent_dma_mask) in setup_pdev_dma_masks()
529 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); in setup_pdev_dma_masks()
530 if (!pdev->dev.dma_mask) { in setup_pdev_dma_masks()
531 pdev->platform_dma_mask = DMA_BIT_MASK(32); in setup_pdev_dma_masks()
532 pdev->dev.dma_mask = &pdev->platform_dma_mask; in setup_pdev_dma_masks()
537 * platform_device_put - destroy a platform device
538 * @pdev: platform device to free
540 * Free all memory associated with a platform device. This function must
546 put_device(&pdev->dev); in platform_device_put()
555 of_node_put(pa->pdev.dev.of_node); in platform_device_release()
556 kfree(pa->pdev.dev.platform_data); in platform_device_release()
557 kfree(pa->pdev.mfd_cell); in platform_device_release()
558 kfree(pa->pdev.resource); in platform_device_release()
559 kfree(pa->pdev.driver_override); in platform_device_release()
564 * platform_device_alloc - create a platform device
568 * Create a platform device object which can have other objects attached
577 strcpy(pa->name, name); in platform_device_alloc()
578 pa->pdev.name = pa->name; in platform_device_alloc()
579 pa->pdev.id = id; in platform_device_alloc()
580 device_initialize(&pa->pdev.dev); in platform_device_alloc()
581 pa->pdev.dev.release = platform_device_release; in platform_device_alloc()
582 setup_pdev_dma_masks(&pa->pdev); in platform_device_alloc()
585 return pa ? &pa->pdev : NULL; in platform_device_alloc()
590 * platform_device_add_resources - add resources to a platform device
591 * @pdev: platform device allocated by platform_device_alloc to add resources to
595 * Add a copy of the resources to the platform device. The memory
596 * associated with the resources will be freed when the platform device is
607 return -ENOMEM; in platform_device_add_resources()
610 kfree(pdev->resource); in platform_device_add_resources()
611 pdev->resource = r; in platform_device_add_resources()
612 pdev->num_resources = num; in platform_device_add_resources()
618 * platform_device_add_data - add platform-specific data to a platform device
619 * @pdev: platform device allocated by platform_device_alloc to add resources to
620 * @data: platform specific data for this platform device
621 * @size: size of platform specific data
623 * Add a copy of platform specific data to the platform device's
624 * platform_data pointer. The memory associated with the platform data
625 * will be freed when the platform device is released.
635 return -ENOMEM; in platform_device_add_data()
638 kfree(pdev->dev.platform_data); in platform_device_add_data()
639 pdev->dev.platform_data = d; in platform_device_add_data()
645 * platform_device_add - add a platform device to device hierarchy
646 * @pdev: platform device we're adding
657 return -EINVAL; in platform_device_add()
659 if (!pdev->dev.parent) in platform_device_add()
660 pdev->dev.parent = &platform_bus; in platform_device_add()
662 pdev->dev.bus = &platform_bus_type; in platform_device_add()
664 switch (pdev->id) { in platform_device_add()
666 dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); in platform_device_add()
669 dev_set_name(&pdev->dev, "%s", pdev->name); in platform_device_add()
680 pdev->id = ret; in platform_device_add()
681 pdev->id_auto = true; in platform_device_add()
682 dev_set_name(&pdev->dev, "%s.%d.auto", pdev->name, pdev->id); in platform_device_add()
686 for (i = 0; i < pdev->num_resources; i++) { in platform_device_add()
687 struct resource *p, *r = &pdev->resource[i]; in platform_device_add()
689 if (r->name == NULL) in platform_device_add()
690 r->name = dev_name(&pdev->dev); in platform_device_add()
692 p = r->parent; in platform_device_add()
703 dev_err(&pdev->dev, "failed to claim resource %d: %pR\n", i, r); in platform_device_add()
709 pr_debug("Registering platform device '%s'. Parent at %s\n", in platform_device_add()
710 dev_name(&pdev->dev), dev_name(pdev->dev.parent)); in platform_device_add()
712 ret = device_add(&pdev->dev); in platform_device_add()
717 if (pdev->id_auto) { in platform_device_add()
718 ida_free(&platform_devid_ida, pdev->id); in platform_device_add()
719 pdev->id = PLATFORM_DEVID_AUTO; in platform_device_add()
722 while (i--) { in platform_device_add()
723 struct resource *r = &pdev->resource[i]; in platform_device_add()
724 if (r->parent) in platform_device_add()
734 * platform_device_del - remove a platform-level device
735 * @pdev: platform device we're removing
737 * Note that this function will also release all memory- and port-based
738 * resources owned by the device (@dev->resource). This function must
746 device_del(&pdev->dev); in platform_device_del()
748 if (pdev->id_auto) { in platform_device_del()
749 ida_free(&platform_devid_ida, pdev->id); in platform_device_del()
750 pdev->id = PLATFORM_DEVID_AUTO; in platform_device_del()
753 for (i = 0; i < pdev->num_resources; i++) { in platform_device_del()
754 struct resource *r = &pdev->resource[i]; in platform_device_del()
755 if (r->parent) in platform_device_del()
763 * platform_device_register - add a platform-level device
764 * @pdev: platform device we're adding
768 device_initialize(&pdev->dev); in platform_device_register()
775 * platform_device_unregister - unregister a platform-level device
776 * @pdev: platform device we're unregistering
790 * platform_device_register_full - add a platform-level device with
791 * resources and platform-specific data
803 pdev = platform_device_alloc(pdevinfo->name, pdevinfo->id); in platform_device_register_full()
805 return ERR_PTR(-ENOMEM); in platform_device_register_full()
807 pdev->dev.parent = pdevinfo->parent; in platform_device_register_full()
808 pdev->dev.fwnode = pdevinfo->fwnode; in platform_device_register_full()
809 pdev->dev.of_node = of_node_get(to_of_node(pdev->dev.fwnode)); in platform_device_register_full()
810 pdev->dev.of_node_reused = pdevinfo->of_node_reused; in platform_device_register_full()
812 if (pdevinfo->dma_mask) { in platform_device_register_full()
813 pdev->platform_dma_mask = pdevinfo->dma_mask; in platform_device_register_full()
814 pdev->dev.dma_mask = &pdev->platform_dma_mask; in platform_device_register_full()
815 pdev->dev.coherent_dma_mask = pdevinfo->dma_mask; in platform_device_register_full()
819 pdevinfo->res, pdevinfo->num_res); in platform_device_register_full()
824 pdevinfo->data, pdevinfo->size_data); in platform_device_register_full()
828 if (pdevinfo->properties) { in platform_device_register_full()
829 ret = device_create_managed_software_node(&pdev->dev, in platform_device_register_full()
830 pdevinfo->properties, NULL); in platform_device_register_full()
838 ACPI_COMPANION_SET(&pdev->dev, NULL); in platform_device_register_full()
848 * __platform_driver_register - register a driver for platform-level devices
849 * @drv: platform driver structure
855 drv->driver.owner = owner; in __platform_driver_register()
856 drv->driver.bus = &platform_bus_type; in __platform_driver_register()
858 return driver_register(&drv->driver); in __platform_driver_register()
863 * platform_driver_unregister - unregister a driver for platform-level devices
864 * @drv: platform driver structure
868 driver_unregister(&drv->driver); in platform_driver_unregister()
874 return -ENXIO; in platform_probe_fail()
878 * __platform_driver_probe - register driver for non-hotpluggable device
879 * @drv: platform driver structure
885 * remove its run-once probe() infrastructure from memory after the driver
889 * into system-on-chip processors, where the controller devices have been
902 if (drv->driver.probe_type == PROBE_PREFER_ASYNCHRONOUS) { in __platform_driver_probe()
904 drv->driver.name, __func__); in __platform_driver_probe()
905 return -EINVAL; in __platform_driver_probe()
913 drv->driver.probe_type = PROBE_FORCE_SYNCHRONOUS; in __platform_driver_probe()
919 drv->prevent_deferred_probe = true; in __platform_driver_probe()
922 drv->driver.suppress_bind_attrs = true; in __platform_driver_probe()
925 drv->probe = probe; in __platform_driver_probe()
936 spin_lock(&drv->driver.bus->p->klist_drivers.k_lock); in __platform_driver_probe()
937 drv->probe = platform_probe_fail; in __platform_driver_probe()
938 if (code == 0 && list_empty(&drv->driver.p->klist_devices.k_list)) in __platform_driver_probe()
939 retval = -ENODEV; in __platform_driver_probe()
940 spin_unlock(&drv->driver.bus->p->klist_drivers.k_lock); in __platform_driver_probe()
949 * __platform_create_bundle - register driver and create corresponding device
950 * @driver: platform driver structure
954 * @data: platform specific data for this platform device
955 * @size: size of platform specific data
958 * Use this in legacy-style modules that probe hardware directly and
959 * register a single platform device and corresponding platform driver.
972 pdev = platform_device_alloc(driver->driver.name, -1); in __platform_create_bundle()
974 error = -ENOMEM; in __platform_create_bundle()
1006 * __platform_register_drivers - register an array of platform drivers
1011 * Registers platform drivers specified by an array. On failure to register a
1025 pr_debug("registering platform driver %ps\n", drivers[i]); in __platform_register_drivers()
1029 pr_err("failed to register platform driver %ps: %d\n", in __platform_register_drivers()
1038 while (i--) { in __platform_register_drivers()
1039 pr_debug("unregistering platform driver %ps\n", drivers[i]); in __platform_register_drivers()
1048 * platform_unregister_drivers - unregister an array of platform drivers
1052 * Unregisters platform drivers specified by an array. This is typically used
1059 while (count--) { in platform_unregister_drivers()
1060 pr_debug("unregistering platform driver %ps\n", drivers[count]); in platform_unregister_drivers()
1070 while (id->name[0]) { in platform_match_id()
1071 if (strcmp(pdev->name, id->name) == 0) { in platform_match_id()
1072 pdev->id_entry = id; in platform_match_id()
1084 struct platform_driver *pdrv = to_platform_driver(dev->driver); in platform_legacy_suspend()
1088 if (dev->driver && pdrv->suspend) in platform_legacy_suspend()
1089 ret = pdrv->suspend(pdev, mesg); in platform_legacy_suspend()
1096 struct platform_driver *pdrv = to_platform_driver(dev->driver); in platform_legacy_resume()
1100 if (dev->driver && pdrv->resume) in platform_legacy_resume()
1101 ret = pdrv->resume(pdev); in platform_legacy_resume()
1112 struct device_driver *drv = dev->driver; in platform_pm_suspend()
1118 if (drv->pm) { in platform_pm_suspend()
1119 if (drv->pm->suspend) in platform_pm_suspend()
1120 ret = drv->pm->suspend(dev); in platform_pm_suspend()
1130 struct device_driver *drv = dev->driver; in platform_pm_resume()
1136 if (drv->pm) { in platform_pm_resume()
1137 if (drv->pm->resume) in platform_pm_resume()
1138 ret = drv->pm->resume(dev); in platform_pm_resume()
1152 struct device_driver *drv = dev->driver; in platform_pm_freeze()
1158 if (drv->pm) { in platform_pm_freeze()
1159 if (drv->pm->freeze) in platform_pm_freeze()
1160 ret = drv->pm->freeze(dev); in platform_pm_freeze()
1170 struct device_driver *drv = dev->driver; in platform_pm_thaw()
1176 if (drv->pm) { in platform_pm_thaw()
1177 if (drv->pm->thaw) in platform_pm_thaw()
1178 ret = drv->pm->thaw(dev); in platform_pm_thaw()
1188 struct device_driver *drv = dev->driver; in platform_pm_poweroff()
1194 if (drv->pm) { in platform_pm_poweroff()
1195 if (drv->pm->poweroff) in platform_pm_poweroff()
1196 ret = drv->pm->poweroff(dev); in platform_pm_poweroff()
1206 struct device_driver *drv = dev->driver; in platform_pm_restore()
1212 if (drv->pm) { in platform_pm_restore()
1213 if (drv->pm->restore) in platform_pm_restore()
1214 ret = drv->pm->restore(dev); in platform_pm_restore()
1224 /* modalias support enables more hands-off userspace setup:
1225 * (a) environment variable lets new-style hotplug events work once system is
1227 * (b) sysfs attribute lets new-style coldplug recover from hotplug events
1237 if (len != -ENODEV) in modalias_show()
1240 len = acpi_device_modalias(dev, buf, PAGE_SIZE - 1); in modalias_show()
1241 if (len != -ENODEV) in modalias_show()
1244 return sysfs_emit(buf, "platform:%s\n", pdev->name); in modalias_show()
1262 len = sysfs_emit(buf, "%s\n", pdev->driver_override); in driver_override_show()
1276 if (count >= (PAGE_SIZE - 1)) in driver_override_store()
1277 return -EINVAL; in driver_override_store()
1281 return -ENOMEM; in driver_override_store()
1288 old = pdev->driver_override; in driver_override_store()
1290 pdev->driver_override = driver_override; in driver_override_store()
1293 pdev->driver_override = NULL; in driver_override_store()
1319 return a->mode; in platform_dev_attrs_visible()
1330 * platform_match - bind platform device to platform driver.
1334 * Platform device IDs are assumed to be encoded like this:
1348 if (pdev->driver_override) in platform_match()
1349 return !strcmp(pdev->driver_override, drv->name); in platform_match()
1360 if (pdrv->id_table) in platform_match()
1361 return platform_match_id(pdrv->id_table, pdev) != NULL; in platform_match()
1363 /* fall-back to driver name match */ in platform_match()
1364 return (strcmp(pdev->name, drv->name) == 0); in platform_match()
1372 /* Some devices have extra OF data and an OF-style MODALIAS */ in platform_uevent()
1374 if (rc != -ENODEV) in platform_uevent()
1378 if (rc != -ENODEV) in platform_uevent()
1382 pdev->name); in platform_uevent()
1388 struct platform_driver *drv = to_platform_driver(_dev->driver); in platform_probe()
1399 if (unlikely(drv->probe == platform_probe_fail)) in platform_probe()
1400 return -ENXIO; in platform_probe()
1402 ret = of_clk_set_defaults(_dev->of_node, false); in platform_probe()
1410 if (drv->probe) { in platform_probe()
1411 ret = drv->probe(dev); in platform_probe()
1417 if (drv->prevent_deferred_probe && ret == -EPROBE_DEFER) { in platform_probe()
1419 ret = -ENXIO; in platform_probe()
1427 struct platform_driver *drv = to_platform_driver(_dev->driver); in platform_remove()
1430 if (drv->remove) { in platform_remove()
1431 int ret = drv->remove(dev); in platform_remove()
1434 dev_warn(_dev, "remove callback returned a non-zero value. This will be ignored.\n"); in platform_remove()
1444 if (!_dev->driver) in platform_shutdown()
1447 drv = to_platform_driver(_dev->driver); in platform_shutdown()
1448 if (drv->shutdown) in platform_shutdown()
1449 drv->shutdown(dev); in platform_shutdown()
1458 if (dev->of_node) { in platform_dma_configure()
1459 ret = of_dma_configure(dev, dev->of_node, true); in platform_dma_configure()
1461 attr = acpi_get_dma_attr(to_acpi_device_node(dev->fwnode)); in platform_dma_configure()
1475 .name = "platform",
1493 * platform_find_device_by_driver - Find a platform device with a given