| 1 | /* |
| 2 | * platform.c - platform 'pseudo' bus for legacy devices |
| 3 | * |
| 4 | * Copyright (c) 2002-3 Patrick Mochel |
| 5 | * Copyright (c) 2002-3 Open Source Development Labs |
| 6 | * |
| 7 | * This file is released under the GPLv2 |
| 8 | * |
| 9 | * Please see Documentation/driver-model/platform.txt for more |
| 10 | * information. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/platform_device.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/dma-mapping.h> |
| 17 | #include <linux/bootmem.h> |
| 18 | #include <linux/err.h> |
| 19 | #include <linux/slab.h> |
| 20 | |
| 21 | #include "base.h" |
| 22 | |
| 23 | #define to_platform_driver(drv) (container_of((drv), struct platform_driver, \ |
| 24 | driver)) |
| 25 | |
| 26 | struct device platform_bus = { |
| 27 | .init_name = "platform", |
| 28 | }; |
| 29 | EXPORT_SYMBOL_GPL(platform_bus); |
| 30 | |
| 31 | /** |
| 32 | * platform_get_resource - get a resource for a device |
| 33 | * @dev: platform device |
| 34 | * @type: resource type |
| 35 | * @num: resource index |
| 36 | */ |
| 37 | struct resource *platform_get_resource(struct platform_device *dev, |
| 38 | unsigned int type, unsigned int num) |
| 39 | { |
| 40 | int i; |
| 41 | |
| 42 | for (i = 0; i < dev->num_resources; i++) { |
| 43 | struct resource *r = &dev->resource[i]; |
| 44 | |
| 45 | if (type == resource_type(r) && num-- == 0) |
| 46 | return r; |
| 47 | } |
| 48 | return NULL; |
| 49 | } |
| 50 | EXPORT_SYMBOL_GPL(platform_get_resource); |
| 51 | |
| 52 | /** |
| 53 | * platform_get_irq - get an IRQ for a device |
| 54 | * @dev: platform device |
| 55 | * @num: IRQ number index |
| 56 | */ |
| 57 | int platform_get_irq(struct platform_device *dev, unsigned int num) |
| 58 | { |
| 59 | struct resource *r = platform_get_resource(dev, IORESOURCE_IRQ, num); |
| 60 | |
| 61 | return r ? r->start : -ENXIO; |
| 62 | } |
| 63 | EXPORT_SYMBOL_GPL(platform_get_irq); |
| 64 | |
| 65 | /** |
| 66 | * platform_get_resource_byname - get a resource for a device by name |
| 67 | * @dev: platform device |
| 68 | * @type: resource type |
| 69 | * @name: resource name |
| 70 | */ |
| 71 | struct resource *platform_get_resource_byname(struct platform_device *dev, |
| 72 | unsigned int type, char *name) |
| 73 | { |
| 74 | int i; |
| 75 | |
| 76 | for (i = 0; i < dev->num_resources; i++) { |
| 77 | struct resource *r = &dev->resource[i]; |
| 78 | |
| 79 | if (type == resource_type(r) && !strcmp(r->name, name)) |
| 80 | return r; |
| 81 | } |
| 82 | return NULL; |
| 83 | } |
| 84 | EXPORT_SYMBOL_GPL(platform_get_resource_byname); |
| 85 | |
| 86 | /** |
| 87 | * platform_get_irq - get an IRQ for a device |
| 88 | * @dev: platform device |
| 89 | * @name: IRQ name |
| 90 | */ |
| 91 | int platform_get_irq_byname(struct platform_device *dev, char *name) |
| 92 | { |
| 93 | struct resource *r = platform_get_resource_byname(dev, IORESOURCE_IRQ, |
| 94 | name); |
| 95 | |
| 96 | return r ? r->start : -ENXIO; |
| 97 | } |
| 98 | EXPORT_SYMBOL_GPL(platform_get_irq_byname); |
| 99 | |
| 100 | /** |
| 101 | * platform_add_devices - add a numbers of platform devices |
| 102 | * @devs: array of platform devices to add |
| 103 | * @num: number of platform devices in array |
| 104 | */ |
| 105 | int platform_add_devices(struct platform_device **devs, int num) |
| 106 | { |
| 107 | int i, ret = 0; |
| 108 | |
| 109 | for (i = 0; i < num; i++) { |
| 110 | ret = platform_device_register(devs[i]); |
| 111 | if (ret) { |
| 112 | while (--i >= 0) |
| 113 | platform_device_unregister(devs[i]); |
| 114 | break; |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | return ret; |
| 119 | } |
| 120 | EXPORT_SYMBOL_GPL(platform_add_devices); |
| 121 | |
| 122 | struct platform_object { |
| 123 | struct platform_device pdev; |
| 124 | char name[1]; |
| 125 | }; |
| 126 | |
| 127 | /** |
| 128 | * platform_device_put |
| 129 | * @pdev: platform device to free |
| 130 | * |
| 131 | * Free all memory associated with a platform device. This function must |
| 132 | * _only_ be externally called in error cases. All other usage is a bug. |
| 133 | */ |
| 134 | void platform_device_put(struct platform_device *pdev) |
| 135 | { |
| 136 | if (pdev) |
| 137 | put_device(&pdev->dev); |
| 138 | } |
| 139 | EXPORT_SYMBOL_GPL(platform_device_put); |
| 140 | |
| 141 | static void platform_device_release(struct device *dev) |
| 142 | { |
| 143 | struct platform_object *pa = container_of(dev, struct platform_object, |
| 144 | pdev.dev); |
| 145 | |
| 146 | kfree(pa->pdev.dev.platform_data); |
| 147 | kfree(pa->pdev.resource); |
| 148 | kfree(pa); |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * platform_device_alloc |
| 153 | * @name: base name of the device we're adding |
| 154 | * @id: instance id |
| 155 | * |
| 156 | * Create a platform device object which can have other objects attached |
| 157 | * to it, and which will have attached objects freed when it is released. |
| 158 | */ |
| 159 | struct platform_device *platform_device_alloc(const char *name, int id) |
| 160 | { |
| 161 | struct platform_object *pa; |
| 162 | |
| 163 | pa = kzalloc(sizeof(struct platform_object) + strlen(name), GFP_KERNEL); |
| 164 | if (pa) { |
| 165 | strcpy(pa->name, name); |
| 166 | pa->pdev.name = pa->name; |
| 167 | pa->pdev.id = id; |
| 168 | device_initialize(&pa->pdev.dev); |
| 169 | pa->pdev.dev.release = platform_device_release; |
| 170 | } |
| 171 | |
| 172 | return pa ? &pa->pdev : NULL; |
| 173 | } |
| 174 | EXPORT_SYMBOL_GPL(platform_device_alloc); |
| 175 | |
| 176 | /** |
| 177 | * platform_device_add_resources |
| 178 | * @pdev: platform device allocated by platform_device_alloc to add resources to |
| 179 | * @res: set of resources that needs to be allocated for the device |
| 180 | * @num: number of resources |
| 181 | * |
| 182 | * Add a copy of the resources to the platform device. The memory |
| 183 | * associated with the resources will be freed when the platform device is |
| 184 | * released. |
| 185 | */ |
| 186 | int platform_device_add_resources(struct platform_device *pdev, |
| 187 | struct resource *res, unsigned int num) |
| 188 | { |
| 189 | struct resource *r; |
| 190 | |
| 191 | r = kmalloc(sizeof(struct resource) * num, GFP_KERNEL); |
| 192 | if (r) { |
| 193 | memcpy(r, res, sizeof(struct resource) * num); |
| 194 | pdev->resource = r; |
| 195 | pdev->num_resources = num; |
| 196 | } |
| 197 | return r ? 0 : -ENOMEM; |
| 198 | } |
| 199 | EXPORT_SYMBOL_GPL(platform_device_add_resources); |
| 200 | |
| 201 | /** |
| 202 | * platform_device_add_data |
| 203 | * @pdev: platform device allocated by platform_device_alloc to add resources to |
| 204 | * @data: platform specific data for this platform device |
| 205 | * @size: size of platform specific data |
| 206 | * |
| 207 | * Add a copy of platform specific data to the platform device's |
| 208 | * platform_data pointer. The memory associated with the platform data |
| 209 | * will be freed when the platform device is released. |
| 210 | */ |
| 211 | int platform_device_add_data(struct platform_device *pdev, const void *data, |
| 212 | size_t size) |
| 213 | { |
| 214 | void *d; |
| 215 | |
| 216 | d = kmalloc(size, GFP_KERNEL); |
| 217 | if (d) { |
| 218 | memcpy(d, data, size); |
| 219 | pdev->dev.platform_data = d; |
| 220 | } |
| 221 | return d ? 0 : -ENOMEM; |
| 222 | } |
| 223 | EXPORT_SYMBOL_GPL(platform_device_add_data); |
| 224 | |
| 225 | /** |
| 226 | * platform_device_add - add a platform device to device hierarchy |
| 227 | * @pdev: platform device we're adding |
| 228 | * |
| 229 | * This is part 2 of platform_device_register(), though may be called |
| 230 | * separately _iff_ pdev was allocated by platform_device_alloc(). |
| 231 | */ |
| 232 | int platform_device_add(struct platform_device *pdev) |
| 233 | { |
| 234 | int i, ret = 0; |
| 235 | |
| 236 | if (!pdev) |
| 237 | return -EINVAL; |
| 238 | |
| 239 | if (!pdev->dev.parent) |
| 240 | pdev->dev.parent = &platform_bus; |
| 241 | |
| 242 | pdev->dev.bus = &platform_bus_type; |
| 243 | |
| 244 | if (pdev->id != -1) |
| 245 | dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); |
| 246 | else |
| 247 | dev_set_name(&pdev->dev, pdev->name); |
| 248 | |
| 249 | for (i = 0; i < pdev->num_resources; i++) { |
| 250 | struct resource *p, *r = &pdev->resource[i]; |
| 251 | |
| 252 | if (r->name == NULL) |
| 253 | r->name = dev_name(&pdev->dev); |
| 254 | |
| 255 | p = r->parent; |
| 256 | if (!p) { |
| 257 | if (resource_type(r) == IORESOURCE_MEM) |
| 258 | p = &iomem_resource; |
| 259 | else if (resource_type(r) == IORESOURCE_IO) |
| 260 | p = &ioport_resource; |
| 261 | } |
| 262 | |
| 263 | if (p && insert_resource(p, r)) { |
| 264 | printk(KERN_ERR |
| 265 | "%s: failed to claim resource %d\n", |
| 266 | dev_name(&pdev->dev), i); |
| 267 | ret = -EBUSY; |
| 268 | goto failed; |
| 269 | } |
| 270 | } |
| 271 | |
| 272 | pr_debug("Registering platform device '%s'. Parent at %s\n", |
| 273 | dev_name(&pdev->dev), dev_name(pdev->dev.parent)); |
| 274 | |
| 275 | ret = device_add(&pdev->dev); |
| 276 | if (ret == 0) |
| 277 | return ret; |
| 278 | |
| 279 | failed: |
| 280 | while (--i >= 0) { |
| 281 | struct resource *r = &pdev->resource[i]; |
| 282 | unsigned long type = resource_type(r); |
| 283 | |
| 284 | if (type == IORESOURCE_MEM || type == IORESOURCE_IO) |
| 285 | release_resource(r); |
| 286 | } |
| 287 | |
| 288 | return ret; |
| 289 | } |
| 290 | EXPORT_SYMBOL_GPL(platform_device_add); |
| 291 | |
| 292 | /** |
| 293 | * platform_device_del - remove a platform-level device |
| 294 | * @pdev: platform device we're removing |
| 295 | * |
| 296 | * Note that this function will also release all memory- and port-based |
| 297 | * resources owned by the device (@dev->resource). This function must |
| 298 | * _only_ be externally called in error cases. All other usage is a bug. |
| 299 | */ |
| 300 | void platform_device_del(struct platform_device *pdev) |
| 301 | { |
| 302 | int i; |
| 303 | |
| 304 | if (pdev) { |
| 305 | device_del(&pdev->dev); |
| 306 | |
| 307 | for (i = 0; i < pdev->num_resources; i++) { |
| 308 | struct resource *r = &pdev->resource[i]; |
| 309 | unsigned long type = resource_type(r); |
| 310 | |
| 311 | if (type == IORESOURCE_MEM || type == IORESOURCE_IO) |
| 312 | release_resource(r); |
| 313 | } |
| 314 | } |
| 315 | } |
| 316 | EXPORT_SYMBOL_GPL(platform_device_del); |
| 317 | |
| 318 | /** |
| 319 | * platform_device_register - add a platform-level device |
| 320 | * @pdev: platform device we're adding |
| 321 | */ |
| 322 | int platform_device_register(struct platform_device *pdev) |
| 323 | { |
| 324 | device_initialize(&pdev->dev); |
| 325 | return platform_device_add(pdev); |
| 326 | } |
| 327 | EXPORT_SYMBOL_GPL(platform_device_register); |
| 328 | |
| 329 | /** |
| 330 | * platform_device_unregister - unregister a platform-level device |
| 331 | * @pdev: platform device we're unregistering |
| 332 | * |
| 333 | * Unregistration is done in 2 steps. First we release all resources |
| 334 | * and remove it from the subsystem, then we drop reference count by |
| 335 | * calling platform_device_put(). |
| 336 | */ |
| 337 | void platform_device_unregister(struct platform_device *pdev) |
| 338 | { |
| 339 | platform_device_del(pdev); |
| 340 | platform_device_put(pdev); |
| 341 | } |
| 342 | EXPORT_SYMBOL_GPL(platform_device_unregister); |
| 343 | |
| 344 | /** |
| 345 | * platform_device_register_simple |
| 346 | * @name: base name of the device we're adding |
| 347 | * @id: instance id |
| 348 | * @res: set of resources that needs to be allocated for the device |
| 349 | * @num: number of resources |
| 350 | * |
| 351 | * This function creates a simple platform device that requires minimal |
| 352 | * resource and memory management. Canned release function freeing memory |
| 353 | * allocated for the device allows drivers using such devices to be |
| 354 | * unloaded without waiting for the last reference to the device to be |
| 355 | * dropped. |
| 356 | * |
| 357 | * This interface is primarily intended for use with legacy drivers which |
| 358 | * probe hardware directly. Because such drivers create sysfs device nodes |
| 359 | * themselves, rather than letting system infrastructure handle such device |
| 360 | * enumeration tasks, they don't fully conform to the Linux driver model. |
| 361 | * In particular, when such drivers are built as modules, they can't be |
| 362 | * "hotplugged". |
| 363 | */ |
| 364 | struct platform_device *platform_device_register_simple(const char *name, |
| 365 | int id, |
| 366 | struct resource *res, |
| 367 | unsigned int num) |
| 368 | { |
| 369 | struct platform_device *pdev; |
| 370 | int retval; |
| 371 | |
| 372 | pdev = platform_device_alloc(name, id); |
| 373 | if (!pdev) { |
| 374 | retval = -ENOMEM; |
| 375 | goto error; |
| 376 | } |
| 377 | |
| 378 | if (num) { |
| 379 | retval = platform_device_add_resources(pdev, res, num); |
| 380 | if (retval) |
| 381 | goto error; |
| 382 | } |
| 383 | |
| 384 | retval = platform_device_add(pdev); |
| 385 | if (retval) |
| 386 | goto error; |
| 387 | |
| 388 | return pdev; |
| 389 | |
| 390 | error: |
| 391 | platform_device_put(pdev); |
| 392 | return ERR_PTR(retval); |
| 393 | } |
| 394 | EXPORT_SYMBOL_GPL(platform_device_register_simple); |
| 395 | |
| 396 | /** |
| 397 | * platform_device_register_data |
| 398 | * @parent: parent device for the device we're adding |
| 399 | * @name: base name of the device we're adding |
| 400 | * @id: instance id |
| 401 | * @data: platform specific data for this platform device |
| 402 | * @size: size of platform specific data |
| 403 | * |
| 404 | * This function creates a simple platform device that requires minimal |
| 405 | * resource and memory management. Canned release function freeing memory |
| 406 | * allocated for the device allows drivers using such devices to be |
| 407 | * unloaded without waiting for the last reference to the device to be |
| 408 | * dropped. |
| 409 | */ |
| 410 | struct platform_device *platform_device_register_data( |
| 411 | struct device *parent, |
| 412 | const char *name, int id, |
| 413 | const void *data, size_t size) |
| 414 | { |
| 415 | struct platform_device *pdev; |
| 416 | int retval; |
| 417 | |
| 418 | pdev = platform_device_alloc(name, id); |
| 419 | if (!pdev) { |
| 420 | retval = -ENOMEM; |
| 421 | goto error; |
| 422 | } |
| 423 | |
| 424 | pdev->dev.parent = parent; |
| 425 | |
| 426 | if (size) { |
| 427 | retval = platform_device_add_data(pdev, data, size); |
| 428 | if (retval) |
| 429 | goto error; |
| 430 | } |
| 431 | |
| 432 | retval = platform_device_add(pdev); |
| 433 | if (retval) |
| 434 | goto error; |
| 435 | |
| 436 | return pdev; |
| 437 | |
| 438 | error: |
| 439 | platform_device_put(pdev); |
| 440 | return ERR_PTR(retval); |
| 441 | } |
| 442 | |
| 443 | static int platform_drv_probe(struct device *_dev) |
| 444 | { |
| 445 | struct platform_driver *drv = to_platform_driver(_dev->driver); |
| 446 | struct platform_device *dev = to_platform_device(_dev); |
| 447 | |
| 448 | return drv->probe(dev); |
| 449 | } |
| 450 | |
| 451 | static int platform_drv_probe_fail(struct device *_dev) |
| 452 | { |
| 453 | return -ENXIO; |
| 454 | } |
| 455 | |
| 456 | static int platform_drv_remove(struct device *_dev) |
| 457 | { |
| 458 | struct platform_driver *drv = to_platform_driver(_dev->driver); |
| 459 | struct platform_device *dev = to_platform_device(_dev); |
| 460 | |
| 461 | return drv->remove(dev); |
| 462 | } |
| 463 | |
| 464 | static void platform_drv_shutdown(struct device *_dev) |
| 465 | { |
| 466 | struct platform_driver *drv = to_platform_driver(_dev->driver); |
| 467 | struct platform_device *dev = to_platform_device(_dev); |
| 468 | |
| 469 | drv->shutdown(dev); |
| 470 | } |
| 471 | |
| 472 | /** |
| 473 | * platform_driver_register |
| 474 | * @drv: platform driver structure |
| 475 | */ |
| 476 | int platform_driver_register(struct platform_driver *drv) |
| 477 | { |
| 478 | drv->driver.bus = &platform_bus_type; |
| 479 | if (drv->probe) |
| 480 | drv->driver.probe = platform_drv_probe; |
| 481 | if (drv->remove) |
| 482 | drv->driver.remove = platform_drv_remove; |
| 483 | if (drv->shutdown) |
| 484 | drv->driver.shutdown = platform_drv_shutdown; |
| 485 | if (drv->suspend || drv->resume) |
| 486 | pr_warning("Platform driver '%s' needs updating - please use " |
| 487 | "dev_pm_ops\n", drv->driver.name); |
| 488 | |
| 489 | return driver_register(&drv->driver); |
| 490 | } |
| 491 | EXPORT_SYMBOL_GPL(platform_driver_register); |
| 492 | |
| 493 | /** |
| 494 | * platform_driver_unregister |
| 495 | * @drv: platform driver structure |
| 496 | */ |
| 497 | void platform_driver_unregister(struct platform_driver *drv) |
| 498 | { |
| 499 | driver_unregister(&drv->driver); |
| 500 | } |
| 501 | EXPORT_SYMBOL_GPL(platform_driver_unregister); |
| 502 | |
| 503 | /** |
| 504 | * platform_driver_probe - register driver for non-hotpluggable device |
| 505 | * @drv: platform driver structure |
| 506 | * @probe: the driver probe routine, probably from an __init section |
| 507 | * |
| 508 | * Use this instead of platform_driver_register() when you know the device |
| 509 | * is not hotpluggable and has already been registered, and you want to |
| 510 | * remove its run-once probe() infrastructure from memory after the driver |
| 511 | * has bound to the device. |
| 512 | * |
| 513 | * One typical use for this would be with drivers for controllers integrated |
| 514 | * into system-on-chip processors, where the controller devices have been |
| 515 | * configured as part of board setup. |
| 516 | * |
| 517 | * Returns zero if the driver registered and bound to a device, else returns |
| 518 | * a negative error code and with the driver not registered. |
| 519 | */ |
| 520 | int __init_or_module platform_driver_probe(struct platform_driver *drv, |
| 521 | int (*probe)(struct platform_device *)) |
| 522 | { |
| 523 | int retval, code; |
| 524 | |
| 525 | /* temporary section violation during probe() */ |
| 526 | drv->probe = probe; |
| 527 | retval = code = platform_driver_register(drv); |
| 528 | |
| 529 | /* Fixup that section violation, being paranoid about code scanning |
| 530 | * the list of drivers in order to probe new devices. Check to see |
| 531 | * if the probe was successful, and make sure any forced probes of |
| 532 | * new devices fail. |
| 533 | */ |
| 534 | spin_lock(&platform_bus_type.p->klist_drivers.k_lock); |
| 535 | drv->probe = NULL; |
| 536 | if (code == 0 && list_empty(&drv->driver.p->klist_devices.k_list)) |
| 537 | retval = -ENODEV; |
| 538 | drv->driver.probe = platform_drv_probe_fail; |
| 539 | spin_unlock(&platform_bus_type.p->klist_drivers.k_lock); |
| 540 | |
| 541 | if (code != retval) |
| 542 | platform_driver_unregister(drv); |
| 543 | return retval; |
| 544 | } |
| 545 | EXPORT_SYMBOL_GPL(platform_driver_probe); |
| 546 | |
| 547 | /* modalias support enables more hands-off userspace setup: |
| 548 | * (a) environment variable lets new-style hotplug events work once system is |
| 549 | * fully running: "modprobe $MODALIAS" |
| 550 | * (b) sysfs attribute lets new-style coldplug recover from hotplug events |
| 551 | * mishandled before system is fully running: "modprobe $(cat modalias)" |
| 552 | */ |
| 553 | static ssize_t modalias_show(struct device *dev, struct device_attribute *a, |
| 554 | char *buf) |
| 555 | { |
| 556 | struct platform_device *pdev = to_platform_device(dev); |
| 557 | int len = snprintf(buf, PAGE_SIZE, "platform:%s\n", pdev->name); |
| 558 | |
| 559 | return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len; |
| 560 | } |
| 561 | |
| 562 | static struct device_attribute platform_dev_attrs[] = { |
| 563 | __ATTR_RO(modalias), |
| 564 | __ATTR_NULL, |
| 565 | }; |
| 566 | |
| 567 | static int platform_uevent(struct device *dev, struct kobj_uevent_env *env) |
| 568 | { |
| 569 | struct platform_device *pdev = to_platform_device(dev); |
| 570 | |
| 571 | add_uevent_var(env, "MODALIAS=%s%s", PLATFORM_MODULE_PREFIX, |
| 572 | (pdev->id_entry) ? pdev->id_entry->name : pdev->name); |
| 573 | return 0; |
| 574 | } |
| 575 | |
| 576 | static const struct platform_device_id *platform_match_id( |
| 577 | struct platform_device_id *id, |
| 578 | struct platform_device *pdev) |
| 579 | { |
| 580 | while (id->name[0]) { |
| 581 | if (strcmp(pdev->name, id->name) == 0) { |
| 582 | pdev->id_entry = id; |
| 583 | return id; |
| 584 | } |
| 585 | id++; |
| 586 | } |
| 587 | return NULL; |
| 588 | } |
| 589 | |
| 590 | /** |
| 591 | * platform_match - bind platform device to platform driver. |
| 592 | * @dev: device. |
| 593 | * @drv: driver. |
| 594 | * |
| 595 | * Platform device IDs are assumed to be encoded like this: |
| 596 | * "<name><instance>", where <name> is a short description of the type of |
| 597 | * device, like "pci" or "floppy", and <instance> is the enumerated |
| 598 | * instance of the device, like '0' or '42'. Driver IDs are simply |
| 599 | * "<name>". So, extract the <name> from the platform_device structure, |
| 600 | * and compare it against the name of the driver. Return whether they match |
| 601 | * or not. |
| 602 | */ |
| 603 | static int platform_match(struct device *dev, struct device_driver *drv) |
| 604 | { |
| 605 | struct platform_device *pdev = to_platform_device(dev); |
| 606 | struct platform_driver *pdrv = to_platform_driver(drv); |
| 607 | |
| 608 | /* match against the id table first */ |
| 609 | if (pdrv->id_table) |
| 610 | return platform_match_id(pdrv->id_table, pdev) != NULL; |
| 611 | |
| 612 | /* fall-back to driver name match */ |
| 613 | return (strcmp(pdev->name, drv->name) == 0); |
| 614 | } |
| 615 | |
| 616 | #ifdef CONFIG_PM_SLEEP |
| 617 | |
| 618 | static int platform_legacy_suspend(struct device *dev, pm_message_t mesg) |
| 619 | { |
| 620 | struct platform_driver *pdrv = to_platform_driver(dev->driver); |
| 621 | struct platform_device *pdev = to_platform_device(dev); |
| 622 | int ret = 0; |
| 623 | |
| 624 | if (dev->driver && pdrv->suspend) |
| 625 | ret = pdrv->suspend(pdev, mesg); |
| 626 | |
| 627 | return ret; |
| 628 | } |
| 629 | |
| 630 | static int platform_legacy_suspend_late(struct device *dev, pm_message_t mesg) |
| 631 | { |
| 632 | struct platform_driver *pdrv = to_platform_driver(dev->driver); |
| 633 | struct platform_device *pdev = to_platform_device(dev); |
| 634 | int ret = 0; |
| 635 | |
| 636 | if (dev->driver && pdrv->suspend_late) |
| 637 | ret = pdrv->suspend_late(pdev, mesg); |
| 638 | |
| 639 | return ret; |
| 640 | } |
| 641 | |
| 642 | static int platform_legacy_resume_early(struct device *dev) |
| 643 | { |
| 644 | struct platform_driver *pdrv = to_platform_driver(dev->driver); |
| 645 | struct platform_device *pdev = to_platform_device(dev); |
| 646 | int ret = 0; |
| 647 | |
| 648 | if (dev->driver && pdrv->resume_early) |
| 649 | ret = pdrv->resume_early(pdev); |
| 650 | |
| 651 | return ret; |
| 652 | } |
| 653 | |
| 654 | static int platform_legacy_resume(struct device *dev) |
| 655 | { |
| 656 | struct platform_driver *pdrv = to_platform_driver(dev->driver); |
| 657 | struct platform_device *pdev = to_platform_device(dev); |
| 658 | int ret = 0; |
| 659 | |
| 660 | if (dev->driver && pdrv->resume) |
| 661 | ret = pdrv->resume(pdev); |
| 662 | |
| 663 | return ret; |
| 664 | } |
| 665 | |
| 666 | static int platform_pm_prepare(struct device *dev) |
| 667 | { |
| 668 | struct device_driver *drv = dev->driver; |
| 669 | int ret = 0; |
| 670 | |
| 671 | if (drv && drv->pm && drv->pm->prepare) |
| 672 | ret = drv->pm->prepare(dev); |
| 673 | |
| 674 | return ret; |
| 675 | } |
| 676 | |
| 677 | static void platform_pm_complete(struct device *dev) |
| 678 | { |
| 679 | struct device_driver *drv = dev->driver; |
| 680 | |
| 681 | if (drv && drv->pm && drv->pm->complete) |
| 682 | drv->pm->complete(dev); |
| 683 | } |
| 684 | |
| 685 | #ifdef CONFIG_SUSPEND |
| 686 | |
| 687 | static int platform_pm_suspend(struct device *dev) |
| 688 | { |
| 689 | struct device_driver *drv = dev->driver; |
| 690 | int ret = 0; |
| 691 | |
| 692 | if (!drv) |
| 693 | return 0; |
| 694 | |
| 695 | if (drv->pm) { |
| 696 | if (drv->pm->suspend) |
| 697 | ret = drv->pm->suspend(dev); |
| 698 | } else { |
| 699 | ret = platform_legacy_suspend(dev, PMSG_SUSPEND); |
| 700 | } |
| 701 | |
| 702 | return ret; |
| 703 | } |
| 704 | |
| 705 | static int platform_pm_suspend_noirq(struct device *dev) |
| 706 | { |
| 707 | struct device_driver *drv = dev->driver; |
| 708 | int ret = 0; |
| 709 | |
| 710 | if (!drv) |
| 711 | return 0; |
| 712 | |
| 713 | if (drv->pm) { |
| 714 | if (drv->pm->suspend_noirq) |
| 715 | ret = drv->pm->suspend_noirq(dev); |
| 716 | } else { |
| 717 | ret = platform_legacy_suspend_late(dev, PMSG_SUSPEND); |
| 718 | } |
| 719 | |
| 720 | return ret; |
| 721 | } |
| 722 | |
| 723 | static int platform_pm_resume(struct device *dev) |
| 724 | { |
| 725 | struct device_driver *drv = dev->driver; |
| 726 | int ret = 0; |
| 727 | |
| 728 | if (!drv) |
| 729 | return 0; |
| 730 | |
| 731 | if (drv->pm) { |
| 732 | if (drv->pm->resume) |
| 733 | ret = drv->pm->resume(dev); |
| 734 | } else { |
| 735 | ret = platform_legacy_resume(dev); |
| 736 | } |
| 737 | |
| 738 | return ret; |
| 739 | } |
| 740 | |
| 741 | static int platform_pm_resume_noirq(struct device *dev) |
| 742 | { |
| 743 | struct device_driver *drv = dev->driver; |
| 744 | int ret = 0; |
| 745 | |
| 746 | if (!drv) |
| 747 | return 0; |
| 748 | |
| 749 | if (drv->pm) { |
| 750 | if (drv->pm->resume_noirq) |
| 751 | ret = drv->pm->resume_noirq(dev); |
| 752 | } else { |
| 753 | ret = platform_legacy_resume_early(dev); |
| 754 | } |
| 755 | |
| 756 | return ret; |
| 757 | } |
| 758 | |
| 759 | #else /* !CONFIG_SUSPEND */ |
| 760 | |
| 761 | #define platform_pm_suspend NULL |
| 762 | #define platform_pm_resume NULL |
| 763 | #define platform_pm_suspend_noirq NULL |
| 764 | #define platform_pm_resume_noirq NULL |
| 765 | |
| 766 | #endif /* !CONFIG_SUSPEND */ |
| 767 | |
| 768 | #ifdef CONFIG_HIBERNATION |
| 769 | |
| 770 | static int platform_pm_freeze(struct device *dev) |
| 771 | { |
| 772 | struct device_driver *drv = dev->driver; |
| 773 | int ret = 0; |
| 774 | |
| 775 | if (!drv) |
| 776 | return 0; |
| 777 | |
| 778 | if (drv->pm) { |
| 779 | if (drv->pm->freeze) |
| 780 | ret = drv->pm->freeze(dev); |
| 781 | } else { |
| 782 | ret = platform_legacy_suspend(dev, PMSG_FREEZE); |
| 783 | } |
| 784 | |
| 785 | return ret; |
| 786 | } |
| 787 | |
| 788 | static int platform_pm_freeze_noirq(struct device *dev) |
| 789 | { |
| 790 | struct device_driver *drv = dev->driver; |
| 791 | int ret = 0; |
| 792 | |
| 793 | if (!drv) |
| 794 | return 0; |
| 795 | |
| 796 | if (drv->pm) { |
| 797 | if (drv->pm->freeze_noirq) |
| 798 | ret = drv->pm->freeze_noirq(dev); |
| 799 | } else { |
| 800 | ret = platform_legacy_suspend_late(dev, PMSG_FREEZE); |
| 801 | } |
| 802 | |
| 803 | return ret; |
| 804 | } |
| 805 | |
| 806 | static int platform_pm_thaw(struct device *dev) |
| 807 | { |
| 808 | struct device_driver *drv = dev->driver; |
| 809 | int ret = 0; |
| 810 | |
| 811 | if (!drv) |
| 812 | return 0; |
| 813 | |
| 814 | if (drv->pm) { |
| 815 | if (drv->pm->thaw) |
| 816 | ret = drv->pm->thaw(dev); |
| 817 | } else { |
| 818 | ret = platform_legacy_resume(dev); |
| 819 | } |
| 820 | |
| 821 | return ret; |
| 822 | } |
| 823 | |
| 824 | static int platform_pm_thaw_noirq(struct device *dev) |
| 825 | { |
| 826 | struct device_driver *drv = dev->driver; |
| 827 | int ret = 0; |
| 828 | |
| 829 | if (!drv) |
| 830 | return 0; |
| 831 | |
| 832 | if (drv->pm) { |
| 833 | if (drv->pm->thaw_noirq) |
| 834 | ret = drv->pm->thaw_noirq(dev); |
| 835 | } else { |
| 836 | ret = platform_legacy_resume_early(dev); |
| 837 | } |
| 838 | |
| 839 | return ret; |
| 840 | } |
| 841 | |
| 842 | static int platform_pm_poweroff(struct device *dev) |
| 843 | { |
| 844 | struct device_driver *drv = dev->driver; |
| 845 | int ret = 0; |
| 846 | |
| 847 | if (!drv) |
| 848 | return 0; |
| 849 | |
| 850 | if (drv->pm) { |
| 851 | if (drv->pm->poweroff) |
| 852 | ret = drv->pm->poweroff(dev); |
| 853 | } else { |
| 854 | ret = platform_legacy_suspend(dev, PMSG_HIBERNATE); |
| 855 | } |
| 856 | |
| 857 | return ret; |
| 858 | } |
| 859 | |
| 860 | static int platform_pm_poweroff_noirq(struct device *dev) |
| 861 | { |
| 862 | struct device_driver *drv = dev->driver; |
| 863 | int ret = 0; |
| 864 | |
| 865 | if (!drv) |
| 866 | return 0; |
| 867 | |
| 868 | if (drv->pm) { |
| 869 | if (drv->pm->poweroff_noirq) |
| 870 | ret = drv->pm->poweroff_noirq(dev); |
| 871 | } else { |
| 872 | ret = platform_legacy_suspend_late(dev, PMSG_HIBERNATE); |
| 873 | } |
| 874 | |
| 875 | return ret; |
| 876 | } |
| 877 | |
| 878 | static int platform_pm_restore(struct device *dev) |
| 879 | { |
| 880 | struct device_driver *drv = dev->driver; |
| 881 | int ret = 0; |
| 882 | |
| 883 | if (!drv) |
| 884 | return 0; |
| 885 | |
| 886 | if (drv->pm) { |
| 887 | if (drv->pm->restore) |
| 888 | ret = drv->pm->restore(dev); |
| 889 | } else { |
| 890 | ret = platform_legacy_resume(dev); |
| 891 | } |
| 892 | |
| 893 | return ret; |
| 894 | } |
| 895 | |
| 896 | static int platform_pm_restore_noirq(struct device *dev) |
| 897 | { |
| 898 | struct device_driver *drv = dev->driver; |
| 899 | int ret = 0; |
| 900 | |
| 901 | if (!drv) |
| 902 | return 0; |
| 903 | |
| 904 | if (drv->pm) { |
| 905 | if (drv->pm->restore_noirq) |
| 906 | ret = drv->pm->restore_noirq(dev); |
| 907 | } else { |
| 908 | ret = platform_legacy_resume_early(dev); |
| 909 | } |
| 910 | |
| 911 | return ret; |
| 912 | } |
| 913 | |
| 914 | #else /* !CONFIG_HIBERNATION */ |
| 915 | |
| 916 | #define platform_pm_freeze NULL |
| 917 | #define platform_pm_thaw NULL |
| 918 | #define platform_pm_poweroff NULL |
| 919 | #define platform_pm_restore NULL |
| 920 | #define platform_pm_freeze_noirq NULL |
| 921 | #define platform_pm_thaw_noirq NULL |
| 922 | #define platform_pm_poweroff_noirq NULL |
| 923 | #define platform_pm_restore_noirq NULL |
| 924 | |
| 925 | #endif /* !CONFIG_HIBERNATION */ |
| 926 | |
| 927 | static struct dev_pm_ops platform_dev_pm_ops = { |
| 928 | .prepare = platform_pm_prepare, |
| 929 | .complete = platform_pm_complete, |
| 930 | .suspend = platform_pm_suspend, |
| 931 | .resume = platform_pm_resume, |
| 932 | .freeze = platform_pm_freeze, |
| 933 | .thaw = platform_pm_thaw, |
| 934 | .poweroff = platform_pm_poweroff, |
| 935 | .restore = platform_pm_restore, |
| 936 | .suspend_noirq = platform_pm_suspend_noirq, |
| 937 | .resume_noirq = platform_pm_resume_noirq, |
| 938 | .freeze_noirq = platform_pm_freeze_noirq, |
| 939 | .thaw_noirq = platform_pm_thaw_noirq, |
| 940 | .poweroff_noirq = platform_pm_poweroff_noirq, |
| 941 | .restore_noirq = platform_pm_restore_noirq, |
| 942 | }; |
| 943 | |
| 944 | #define PLATFORM_PM_OPS_PTR (&platform_dev_pm_ops) |
| 945 | |
| 946 | #else /* !CONFIG_PM_SLEEP */ |
| 947 | |
| 948 | #define PLATFORM_PM_OPS_PTR NULL |
| 949 | |
| 950 | #endif /* !CONFIG_PM_SLEEP */ |
| 951 | |
| 952 | struct bus_type platform_bus_type = { |
| 953 | .name = "platform", |
| 954 | .dev_attrs = platform_dev_attrs, |
| 955 | .match = platform_match, |
| 956 | .uevent = platform_uevent, |
| 957 | .pm = PLATFORM_PM_OPS_PTR, |
| 958 | }; |
| 959 | EXPORT_SYMBOL_GPL(platform_bus_type); |
| 960 | |
| 961 | int __init platform_bus_init(void) |
| 962 | { |
| 963 | int error; |
| 964 | |
| 965 | early_platform_cleanup(); |
| 966 | |
| 967 | error = device_register(&platform_bus); |
| 968 | if (error) |
| 969 | return error; |
| 970 | error = bus_register(&platform_bus_type); |
| 971 | if (error) |
| 972 | device_unregister(&platform_bus); |
| 973 | return error; |
| 974 | } |
| 975 | |
| 976 | #ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK |
| 977 | u64 dma_get_required_mask(struct device *dev) |
| 978 | { |
| 979 | u32 low_totalram = ((max_pfn - 1) << PAGE_SHIFT); |
| 980 | u32 high_totalram = ((max_pfn - 1) >> (32 - PAGE_SHIFT)); |
| 981 | u64 mask; |
| 982 | |
| 983 | if (!high_totalram) { |
| 984 | /* convert to mask just covering totalram */ |
| 985 | low_totalram = (1 << (fls(low_totalram) - 1)); |
| 986 | low_totalram += low_totalram - 1; |
| 987 | mask = low_totalram; |
| 988 | } else { |
| 989 | high_totalram = (1 << (fls(high_totalram) - 1)); |
| 990 | high_totalram += high_totalram - 1; |
| 991 | mask = (((u64)high_totalram) << 32) + 0xffffffff; |
| 992 | } |
| 993 | return mask; |
| 994 | } |
| 995 | EXPORT_SYMBOL_GPL(dma_get_required_mask); |
| 996 | #endif |
| 997 | |
| 998 | static __initdata LIST_HEAD(early_platform_driver_list); |
| 999 | static __initdata LIST_HEAD(early_platform_device_list); |
| 1000 | |
| 1001 | /** |
| 1002 | * early_platform_driver_register |
| 1003 | * @epdrv: early_platform driver structure |
| 1004 | * @buf: string passed from early_param() |
| 1005 | */ |
| 1006 | int __init early_platform_driver_register(struct early_platform_driver *epdrv, |
| 1007 | char *buf) |
| 1008 | { |
| 1009 | unsigned long index; |
| 1010 | int n; |
| 1011 | |
| 1012 | /* Simply add the driver to the end of the global list. |
| 1013 | * Drivers will by default be put on the list in compiled-in order. |
| 1014 | */ |
| 1015 | if (!epdrv->list.next) { |
| 1016 | INIT_LIST_HEAD(&epdrv->list); |
| 1017 | list_add_tail(&epdrv->list, &early_platform_driver_list); |
| 1018 | } |
| 1019 | |
| 1020 | /* If the user has specified device then make sure the driver |
| 1021 | * gets prioritized. The driver of the last device specified on |
| 1022 | * command line will be put first on the list. |
| 1023 | */ |
| 1024 | n = strlen(epdrv->pdrv->driver.name); |
| 1025 | if (buf && !strncmp(buf, epdrv->pdrv->driver.name, n)) { |
| 1026 | list_move(&epdrv->list, &early_platform_driver_list); |
| 1027 | |
| 1028 | if (!strcmp(buf, epdrv->pdrv->driver.name)) |
| 1029 | epdrv->requested_id = -1; |
| 1030 | else if (buf[n] == '.' && strict_strtoul(&buf[n + 1], 10, |
| 1031 | &index) == 0) |
| 1032 | epdrv->requested_id = index; |
| 1033 | else |
| 1034 | epdrv->requested_id = EARLY_PLATFORM_ID_ERROR; |
| 1035 | } |
| 1036 | |
| 1037 | return 0; |
| 1038 | } |
| 1039 | |
| 1040 | /** |
| 1041 | * early_platform_add_devices - add a numbers of early platform devices |
| 1042 | * @devs: array of early platform devices to add |
| 1043 | * @num: number of early platform devices in array |
| 1044 | */ |
| 1045 | void __init early_platform_add_devices(struct platform_device **devs, int num) |
| 1046 | { |
| 1047 | struct device *dev; |
| 1048 | int i; |
| 1049 | |
| 1050 | /* simply add the devices to list */ |
| 1051 | for (i = 0; i < num; i++) { |
| 1052 | dev = &devs[i]->dev; |
| 1053 | |
| 1054 | if (!dev->devres_head.next) { |
| 1055 | INIT_LIST_HEAD(&dev->devres_head); |
| 1056 | list_add_tail(&dev->devres_head, |
| 1057 | &early_platform_device_list); |
| 1058 | } |
| 1059 | } |
| 1060 | } |
| 1061 | |
| 1062 | /** |
| 1063 | * early_platform_driver_register_all |
| 1064 | * @class_str: string to identify early platform driver class |
| 1065 | */ |
| 1066 | void __init early_platform_driver_register_all(char *class_str) |
| 1067 | { |
| 1068 | /* The "class_str" parameter may or may not be present on the kernel |
| 1069 | * command line. If it is present then there may be more than one |
| 1070 | * matching parameter. |
| 1071 | * |
| 1072 | * Since we register our early platform drivers using early_param() |
| 1073 | * we need to make sure that they also get registered in the case |
| 1074 | * when the parameter is missing from the kernel command line. |
| 1075 | * |
| 1076 | * We use parse_early_options() to make sure the early_param() gets |
| 1077 | * called at least once. The early_param() may be called more than |
| 1078 | * once since the name of the preferred device may be specified on |
| 1079 | * the kernel command line. early_platform_driver_register() handles |
| 1080 | * this case for us. |
| 1081 | */ |
| 1082 | parse_early_options(class_str); |
| 1083 | } |
| 1084 | |
| 1085 | /** |
| 1086 | * early_platform_match |
| 1087 | * @epdrv: early platform driver structure |
| 1088 | * @id: id to match against |
| 1089 | */ |
| 1090 | static __init struct platform_device * |
| 1091 | early_platform_match(struct early_platform_driver *epdrv, int id) |
| 1092 | { |
| 1093 | struct platform_device *pd; |
| 1094 | |
| 1095 | list_for_each_entry(pd, &early_platform_device_list, dev.devres_head) |
| 1096 | if (platform_match(&pd->dev, &epdrv->pdrv->driver)) |
| 1097 | if (pd->id == id) |
| 1098 | return pd; |
| 1099 | |
| 1100 | return NULL; |
| 1101 | } |
| 1102 | |
| 1103 | /** |
| 1104 | * early_platform_left |
| 1105 | * @epdrv: early platform driver structure |
| 1106 | * @id: return true if id or above exists |
| 1107 | */ |
| 1108 | static __init int early_platform_left(struct early_platform_driver *epdrv, |
| 1109 | int id) |
| 1110 | { |
| 1111 | struct platform_device *pd; |
| 1112 | |
| 1113 | list_for_each_entry(pd, &early_platform_device_list, dev.devres_head) |
| 1114 | if (platform_match(&pd->dev, &epdrv->pdrv->driver)) |
| 1115 | if (pd->id >= id) |
| 1116 | return 1; |
| 1117 | |
| 1118 | return 0; |
| 1119 | } |
| 1120 | |
| 1121 | /** |
| 1122 | * early_platform_driver_probe_id |
| 1123 | * @class_str: string to identify early platform driver class |
| 1124 | * @id: id to match against |
| 1125 | * @nr_probe: number of platform devices to successfully probe before exiting |
| 1126 | */ |
| 1127 | static int __init early_platform_driver_probe_id(char *class_str, |
| 1128 | int id, |
| 1129 | int nr_probe) |
| 1130 | { |
| 1131 | struct early_platform_driver *epdrv; |
| 1132 | struct platform_device *match; |
| 1133 | int match_id; |
| 1134 | int n = 0; |
| 1135 | int left = 0; |
| 1136 | |
| 1137 | list_for_each_entry(epdrv, &early_platform_driver_list, list) { |
| 1138 | /* only use drivers matching our class_str */ |
| 1139 | if (strcmp(class_str, epdrv->class_str)) |
| 1140 | continue; |
| 1141 | |
| 1142 | if (id == -2) { |
| 1143 | match_id = epdrv->requested_id; |
| 1144 | left = 1; |
| 1145 | |
| 1146 | } else { |
| 1147 | match_id = id; |
| 1148 | left += early_platform_left(epdrv, id); |
| 1149 | |
| 1150 | /* skip requested id */ |
| 1151 | switch (epdrv->requested_id) { |
| 1152 | case EARLY_PLATFORM_ID_ERROR: |
| 1153 | case EARLY_PLATFORM_ID_UNSET: |
| 1154 | break; |
| 1155 | default: |
| 1156 | if (epdrv->requested_id == id) |
| 1157 | match_id = EARLY_PLATFORM_ID_UNSET; |
| 1158 | } |
| 1159 | } |
| 1160 | |
| 1161 | switch (match_id) { |
| 1162 | case EARLY_PLATFORM_ID_ERROR: |
| 1163 | pr_warning("%s: unable to parse %s parameter\n", |
| 1164 | class_str, epdrv->pdrv->driver.name); |
| 1165 | /* fall-through */ |
| 1166 | case EARLY_PLATFORM_ID_UNSET: |
| 1167 | match = NULL; |
| 1168 | break; |
| 1169 | default: |
| 1170 | match = early_platform_match(epdrv, match_id); |
| 1171 | } |
| 1172 | |
| 1173 | if (match) { |
| 1174 | if (epdrv->pdrv->probe(match)) |
| 1175 | pr_warning("%s: unable to probe %s early.\n", |
| 1176 | class_str, match->name); |
| 1177 | else |
| 1178 | n++; |
| 1179 | } |
| 1180 | |
| 1181 | if (n >= nr_probe) |
| 1182 | break; |
| 1183 | } |
| 1184 | |
| 1185 | if (left) |
| 1186 | return n; |
| 1187 | else |
| 1188 | return -ENODEV; |
| 1189 | } |
| 1190 | |
| 1191 | /** |
| 1192 | * early_platform_driver_probe |
| 1193 | * @class_str: string to identify early platform driver class |
| 1194 | * @nr_probe: number of platform devices to successfully probe before exiting |
| 1195 | * @user_only: only probe user specified early platform devices |
| 1196 | */ |
| 1197 | int __init early_platform_driver_probe(char *class_str, |
| 1198 | int nr_probe, |
| 1199 | int user_only) |
| 1200 | { |
| 1201 | int k, n, i; |
| 1202 | |
| 1203 | n = 0; |
| 1204 | for (i = -2; n < nr_probe; i++) { |
| 1205 | k = early_platform_driver_probe_id(class_str, i, nr_probe - n); |
| 1206 | |
| 1207 | if (k < 0) |
| 1208 | break; |
| 1209 | |
| 1210 | n += k; |
| 1211 | |
| 1212 | if (user_only) |
| 1213 | break; |
| 1214 | } |
| 1215 | |
| 1216 | return n; |
| 1217 | } |
| 1218 | |
| 1219 | /** |
| 1220 | * early_platform_cleanup - clean up early platform code |
| 1221 | */ |
| 1222 | void __init early_platform_cleanup(void) |
| 1223 | { |
| 1224 | struct platform_device *pd, *pd2; |
| 1225 | |
| 1226 | /* clean up the devres list used to chain devices */ |
| 1227 | list_for_each_entry_safe(pd, pd2, &early_platform_device_list, |
| 1228 | dev.devres_head) { |
| 1229 | list_del(&pd->dev.devres_head); |
| 1230 | memset(&pd->dev.devres_head, 0, sizeof(pd->dev.devres_head)); |
| 1231 | } |
| 1232 | } |
| 1233 | |