]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
daa41226 | 13 | #include <linux/string.h> |
d052d1be | 14 | #include <linux/platform_device.h> |
05212157 | 15 | #include <linux/of_device.h> |
9ec36caf | 16 | #include <linux/of_irq.h> |
1da177e4 LT |
17 | #include <linux/module.h> |
18 | #include <linux/init.h> | |
19 | #include <linux/dma-mapping.h> | |
20 | #include <linux/bootmem.h> | |
21 | #include <linux/err.h> | |
4e57b681 | 22 | #include <linux/slab.h> |
9d730229 | 23 | #include <linux/pm_runtime.h> |
f48c767c | 24 | #include <linux/pm_domain.h> |
689ae231 | 25 | #include <linux/idr.h> |
91e56878 | 26 | #include <linux/acpi.h> |
86be408b | 27 | #include <linux/clk/clk-conf.h> |
3d713e0e | 28 | #include <linux/limits.h> |
00bbc1d8 | 29 | #include <linux/property.h> |
1da177e4 | 30 | |
a1bdc7aa | 31 | #include "base.h" |
bed2b42d | 32 | #include "power/power.h" |
a1bdc7aa | 33 | |
689ae231 JD |
34 | /* For automatically allocated device IDs */ |
35 | static DEFINE_IDA(platform_devid_ida); | |
36 | ||
1da177e4 | 37 | struct device platform_bus = { |
1e0b2cf9 | 38 | .init_name = "platform", |
1da177e4 | 39 | }; |
a96b2042 | 40 | EXPORT_SYMBOL_GPL(platform_bus); |
1da177e4 | 41 | |
a77ce816 KG |
42 | /** |
43 | * arch_setup_pdev_archdata - Allow manipulation of archdata before its used | |
7de636fa | 44 | * @pdev: platform device |
a77ce816 KG |
45 | * |
46 | * This is called before platform_device_add() such that any pdev_archdata may | |
47 | * be setup before the platform_notifier is called. So if a user needs to | |
48 | * manipulate any relevant information in the pdev_archdata they can do: | |
49 | * | |
b1d6d822 | 50 | * platform_device_alloc() |
0258e182 FP |
51 | * ... manipulate ... |
52 | * platform_device_add() | |
a77ce816 KG |
53 | * |
54 | * And if they don't care they can just call platform_device_register() and | |
55 | * everything will just work out. | |
56 | */ | |
57 | void __weak arch_setup_pdev_archdata(struct platform_device *pdev) | |
58 | { | |
59 | } | |
60 | ||
1da177e4 | 61 | /** |
4a3ad20c GKH |
62 | * platform_get_resource - get a resource for a device |
63 | * @dev: platform device | |
64 | * @type: resource type | |
65 | * @num: resource index | |
1da177e4 | 66 | */ |
4a3ad20c GKH |
67 | struct resource *platform_get_resource(struct platform_device *dev, |
68 | unsigned int type, unsigned int num) | |
1da177e4 LT |
69 | { |
70 | int i; | |
71 | ||
72 | for (i = 0; i < dev->num_resources; i++) { | |
73 | struct resource *r = &dev->resource[i]; | |
74 | ||
c9f66169 MD |
75 | if (type == resource_type(r) && num-- == 0) |
76 | return r; | |
1da177e4 LT |
77 | } |
78 | return NULL; | |
79 | } | |
a96b2042 | 80 | EXPORT_SYMBOL_GPL(platform_get_resource); |
1da177e4 LT |
81 | |
82 | /** | |
4a3ad20c GKH |
83 | * platform_get_irq - get an IRQ for a device |
84 | * @dev: platform device | |
85 | * @num: IRQ number index | |
1da177e4 LT |
86 | */ |
87 | int platform_get_irq(struct platform_device *dev, unsigned int num) | |
88 | { | |
5cf8f7db AL |
89 | #ifdef CONFIG_SPARC |
90 | /* sparc does not have irqs represented as IORESOURCE_IRQ resources */ | |
91 | if (!dev || num >= dev->archdata.num_irqs) | |
92 | return -ENXIO; | |
93 | return dev->archdata.irqs[num]; | |
94 | #else | |
9ec36caf | 95 | struct resource *r; |
aff008ad GR |
96 | if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) { |
97 | int ret; | |
98 | ||
99 | ret = of_irq_get(dev->dev.of_node, num); | |
100 | if (ret >= 0 || ret == -EPROBE_DEFER) | |
101 | return ret; | |
102 | } | |
9ec36caf RH |
103 | |
104 | r = platform_get_resource(dev, IORESOURCE_IRQ, num); | |
7085a740 LW |
105 | /* |
106 | * The resources may pass trigger flags to the irqs that need | |
107 | * to be set up. It so happens that the trigger flags for | |
108 | * IORESOURCE_BITS correspond 1-to-1 to the IRQF_TRIGGER* | |
109 | * settings. | |
110 | */ | |
111 | if (r && r->flags & IORESOURCE_BITS) | |
112 | irqd_set_trigger_type(irq_get_irq_data(r->start), | |
113 | r->flags & IORESOURCE_BITS); | |
1da177e4 | 114 | |
305b3228 | 115 | return r ? r->start : -ENXIO; |
5cf8f7db | 116 | #endif |
1da177e4 | 117 | } |
a96b2042 | 118 | EXPORT_SYMBOL_GPL(platform_get_irq); |
1da177e4 | 119 | |
4b83555d SB |
120 | /** |
121 | * platform_irq_count - Count the number of IRQs a platform device uses | |
122 | * @dev: platform device | |
123 | * | |
124 | * Return: Number of IRQs a platform device uses or EPROBE_DEFER | |
125 | */ | |
126 | int platform_irq_count(struct platform_device *dev) | |
127 | { | |
128 | int ret, nr = 0; | |
129 | ||
130 | while ((ret = platform_get_irq(dev, nr)) >= 0) | |
131 | nr++; | |
132 | ||
133 | if (ret == -EPROBE_DEFER) | |
134 | return ret; | |
135 | ||
136 | return nr; | |
137 | } | |
138 | EXPORT_SYMBOL_GPL(platform_irq_count); | |
139 | ||
1da177e4 | 140 | /** |
4a3ad20c GKH |
141 | * platform_get_resource_byname - get a resource for a device by name |
142 | * @dev: platform device | |
143 | * @type: resource type | |
144 | * @name: resource name | |
1da177e4 | 145 | */ |
4a3ad20c | 146 | struct resource *platform_get_resource_byname(struct platform_device *dev, |
c0afe7ba LW |
147 | unsigned int type, |
148 | const char *name) | |
1da177e4 LT |
149 | { |
150 | int i; | |
151 | ||
152 | for (i = 0; i < dev->num_resources; i++) { | |
153 | struct resource *r = &dev->resource[i]; | |
154 | ||
1b8cb929 PU |
155 | if (unlikely(!r->name)) |
156 | continue; | |
157 | ||
c9f66169 MD |
158 | if (type == resource_type(r) && !strcmp(r->name, name)) |
159 | return r; | |
1da177e4 LT |
160 | } |
161 | return NULL; | |
162 | } | |
a96b2042 | 163 | EXPORT_SYMBOL_GPL(platform_get_resource_byname); |
1da177e4 LT |
164 | |
165 | /** | |
d6ff8551 | 166 | * platform_get_irq_byname - get an IRQ for a device by name |
4a3ad20c GKH |
167 | * @dev: platform device |
168 | * @name: IRQ name | |
1da177e4 | 169 | */ |
c0afe7ba | 170 | int platform_get_irq_byname(struct platform_device *dev, const char *name) |
1da177e4 | 171 | { |
ad69674e GS |
172 | struct resource *r; |
173 | ||
aff008ad GR |
174 | if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) { |
175 | int ret; | |
176 | ||
177 | ret = of_irq_get_byname(dev->dev.of_node, name); | |
178 | if (ret >= 0 || ret == -EPROBE_DEFER) | |
179 | return ret; | |
180 | } | |
1da177e4 | 181 | |
ad69674e | 182 | r = platform_get_resource_byname(dev, IORESOURCE_IRQ, name); |
305b3228 | 183 | return r ? r->start : -ENXIO; |
1da177e4 | 184 | } |
a96b2042 | 185 | EXPORT_SYMBOL_GPL(platform_get_irq_byname); |
1da177e4 LT |
186 | |
187 | /** | |
4a3ad20c GKH |
188 | * platform_add_devices - add a numbers of platform devices |
189 | * @devs: array of platform devices to add | |
190 | * @num: number of platform devices in array | |
1da177e4 LT |
191 | */ |
192 | int platform_add_devices(struct platform_device **devs, int num) | |
193 | { | |
194 | int i, ret = 0; | |
195 | ||
196 | for (i = 0; i < num; i++) { | |
197 | ret = platform_device_register(devs[i]); | |
198 | if (ret) { | |
199 | while (--i >= 0) | |
200 | platform_device_unregister(devs[i]); | |
201 | break; | |
202 | } | |
203 | } | |
204 | ||
205 | return ret; | |
206 | } | |
a96b2042 | 207 | EXPORT_SYMBOL_GPL(platform_add_devices); |
1da177e4 | 208 | |
37c12e74 RK |
209 | struct platform_object { |
210 | struct platform_device pdev; | |
1cec24c5 | 211 | char name[]; |
37c12e74 RK |
212 | }; |
213 | ||
1da177e4 | 214 | /** |
3c31f07a | 215 | * platform_device_put - destroy a platform device |
4a3ad20c | 216 | * @pdev: platform device to free |
37c12e74 | 217 | * |
4a3ad20c GKH |
218 | * Free all memory associated with a platform device. This function must |
219 | * _only_ be externally called in error cases. All other usage is a bug. | |
37c12e74 RK |
220 | */ |
221 | void platform_device_put(struct platform_device *pdev) | |
222 | { | |
223 | if (pdev) | |
224 | put_device(&pdev->dev); | |
225 | } | |
226 | EXPORT_SYMBOL_GPL(platform_device_put); | |
227 | ||
228 | static void platform_device_release(struct device *dev) | |
229 | { | |
4a3ad20c GKH |
230 | struct platform_object *pa = container_of(dev, struct platform_object, |
231 | pdev.dev); | |
37c12e74 | 232 | |
7096d042 | 233 | of_device_node_put(&pa->pdev.dev); |
37c12e74 | 234 | kfree(pa->pdev.dev.platform_data); |
e710d7d5 | 235 | kfree(pa->pdev.mfd_cell); |
37c12e74 | 236 | kfree(pa->pdev.resource); |
3d713e0e | 237 | kfree(pa->pdev.driver_override); |
37c12e74 RK |
238 | kfree(pa); |
239 | } | |
240 | ||
241 | /** | |
3c31f07a | 242 | * platform_device_alloc - create a platform device |
4a3ad20c GKH |
243 | * @name: base name of the device we're adding |
244 | * @id: instance id | |
37c12e74 | 245 | * |
4a3ad20c GKH |
246 | * Create a platform device object which can have other objects attached |
247 | * to it, and which will have attached objects freed when it is released. | |
37c12e74 | 248 | */ |
1359555e | 249 | struct platform_device *platform_device_alloc(const char *name, int id) |
37c12e74 RK |
250 | { |
251 | struct platform_object *pa; | |
252 | ||
1cec24c5 | 253 | pa = kzalloc(sizeof(*pa) + strlen(name) + 1, GFP_KERNEL); |
37c12e74 RK |
254 | if (pa) { |
255 | strcpy(pa->name, name); | |
256 | pa->pdev.name = pa->name; | |
257 | pa->pdev.id = id; | |
258 | device_initialize(&pa->pdev.dev); | |
259 | pa->pdev.dev.release = platform_device_release; | |
a77ce816 | 260 | arch_setup_pdev_archdata(&pa->pdev); |
37c12e74 RK |
261 | } |
262 | ||
93ce3061 | 263 | return pa ? &pa->pdev : NULL; |
37c12e74 RK |
264 | } |
265 | EXPORT_SYMBOL_GPL(platform_device_alloc); | |
266 | ||
267 | /** | |
3c31f07a | 268 | * platform_device_add_resources - add resources to a platform device |
4a3ad20c GKH |
269 | * @pdev: platform device allocated by platform_device_alloc to add resources to |
270 | * @res: set of resources that needs to be allocated for the device | |
271 | * @num: number of resources | |
37c12e74 | 272 | * |
4a3ad20c GKH |
273 | * Add a copy of the resources to the platform device. The memory |
274 | * associated with the resources will be freed when the platform device is | |
275 | * released. | |
37c12e74 | 276 | */ |
4a3ad20c | 277 | int platform_device_add_resources(struct platform_device *pdev, |
0b7f1a7e | 278 | const struct resource *res, unsigned int num) |
37c12e74 | 279 | { |
cea89623 | 280 | struct resource *r = NULL; |
37c12e74 | 281 | |
cea89623 UKK |
282 | if (res) { |
283 | r = kmemdup(res, sizeof(struct resource) * num, GFP_KERNEL); | |
284 | if (!r) | |
285 | return -ENOMEM; | |
37c12e74 | 286 | } |
cea89623 | 287 | |
4a03d6f7 | 288 | kfree(pdev->resource); |
cea89623 UKK |
289 | pdev->resource = r; |
290 | pdev->num_resources = num; | |
291 | return 0; | |
37c12e74 RK |
292 | } |
293 | EXPORT_SYMBOL_GPL(platform_device_add_resources); | |
294 | ||
295 | /** | |
3c31f07a | 296 | * platform_device_add_data - add platform-specific data to a platform device |
4a3ad20c GKH |
297 | * @pdev: platform device allocated by platform_device_alloc to add resources to |
298 | * @data: platform specific data for this platform device | |
299 | * @size: size of platform specific data | |
37c12e74 | 300 | * |
4a3ad20c GKH |
301 | * Add a copy of platform specific data to the platform device's |
302 | * platform_data pointer. The memory associated with the platform data | |
303 | * will be freed when the platform device is released. | |
37c12e74 | 304 | */ |
4a3ad20c GKH |
305 | int platform_device_add_data(struct platform_device *pdev, const void *data, |
306 | size_t size) | |
37c12e74 | 307 | { |
27a33f9e | 308 | void *d = NULL; |
5cfc64ce | 309 | |
27a33f9e UKK |
310 | if (data) { |
311 | d = kmemdup(data, size, GFP_KERNEL); | |
312 | if (!d) | |
313 | return -ENOMEM; | |
37c12e74 | 314 | } |
27a33f9e | 315 | |
251e031d | 316 | kfree(pdev->dev.platform_data); |
27a33f9e UKK |
317 | pdev->dev.platform_data = d; |
318 | return 0; | |
37c12e74 RK |
319 | } |
320 | EXPORT_SYMBOL_GPL(platform_device_add_data); | |
321 | ||
00bbc1d8 MW |
322 | /** |
323 | * platform_device_add_properties - add built-in properties to a platform device | |
324 | * @pdev: platform device to add properties to | |
325 | * @pset: properties to add | |
326 | * | |
327 | * The function will take deep copy of the properties in @pset and attach | |
328 | * the copy to the platform device. The memory associated with properties | |
329 | * will be freed when the platform device is released. | |
330 | */ | |
331 | int platform_device_add_properties(struct platform_device *pdev, | |
332 | const struct property_set *pset) | |
333 | { | |
334 | return device_add_property_set(&pdev->dev, pset); | |
335 | } | |
336 | EXPORT_SYMBOL_GPL(platform_device_add_properties); | |
337 | ||
37c12e74 | 338 | /** |
4a3ad20c GKH |
339 | * platform_device_add - add a platform device to device hierarchy |
340 | * @pdev: platform device we're adding | |
1da177e4 | 341 | * |
4a3ad20c GKH |
342 | * This is part 2 of platform_device_register(), though may be called |
343 | * separately _iff_ pdev was allocated by platform_device_alloc(). | |
1da177e4 | 344 | */ |
37c12e74 | 345 | int platform_device_add(struct platform_device *pdev) |
1da177e4 | 346 | { |
689ae231 | 347 | int i, ret; |
1da177e4 LT |
348 | |
349 | if (!pdev) | |
350 | return -EINVAL; | |
351 | ||
352 | if (!pdev->dev.parent) | |
353 | pdev->dev.parent = &platform_bus; | |
354 | ||
355 | pdev->dev.bus = &platform_bus_type; | |
356 | ||
689ae231 JD |
357 | switch (pdev->id) { |
358 | default: | |
1e0b2cf9 | 359 | dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); |
689ae231 JD |
360 | break; |
361 | case PLATFORM_DEVID_NONE: | |
acc0e90f | 362 | dev_set_name(&pdev->dev, "%s", pdev->name); |
689ae231 JD |
363 | break; |
364 | case PLATFORM_DEVID_AUTO: | |
365 | /* | |
366 | * Automatically allocated device ID. We mark it as such so | |
367 | * that we remember it must be freed, and we append a suffix | |
368 | * to avoid namespace collision with explicit IDs. | |
369 | */ | |
370 | ret = ida_simple_get(&platform_devid_ida, 0, 0, GFP_KERNEL); | |
371 | if (ret < 0) | |
5da7f709 | 372 | goto err_out; |
689ae231 JD |
373 | pdev->id = ret; |
374 | pdev->id_auto = true; | |
375 | dev_set_name(&pdev->dev, "%s.%d.auto", pdev->name, pdev->id); | |
376 | break; | |
377 | } | |
1da177e4 LT |
378 | |
379 | for (i = 0; i < pdev->num_resources; i++) { | |
5da7f709 | 380 | struct resource *p, *r = &pdev->resource[i]; |
1da177e4 LT |
381 | |
382 | if (r->name == NULL) | |
1e0b2cf9 | 383 | r->name = dev_name(&pdev->dev); |
1da177e4 LT |
384 | |
385 | p = r->parent; | |
386 | if (!p) { | |
0e6c861f | 387 | if (resource_type(r) == IORESOURCE_MEM) |
1da177e4 | 388 | p = &iomem_resource; |
0e6c861f | 389 | else if (resource_type(r) == IORESOURCE_IO) |
1da177e4 LT |
390 | p = &ioport_resource; |
391 | } | |
392 | ||
0e6c861f | 393 | if (p && insert_resource(p, r)) { |
5da7f709 GKH |
394 | dev_err(&pdev->dev, "failed to claim resource %d\n", i); |
395 | ret = -EBUSY; | |
396 | goto failed; | |
397 | } | |
1da177e4 LT |
398 | } |
399 | ||
400 | pr_debug("Registering platform device '%s'. Parent at %s\n", | |
1e0b2cf9 | 401 | dev_name(&pdev->dev), dev_name(pdev->dev.parent)); |
1da177e4 | 402 | |
e3915532 | 403 | ret = device_add(&pdev->dev); |
8b2dceba GKH |
404 | if (ret == 0) |
405 | return ret; | |
406 | ||
5da7f709 | 407 | failed: |
8b2dceba GKH |
408 | if (pdev->id_auto) { |
409 | ida_simple_remove(&platform_devid_ida, pdev->id); | |
410 | pdev->id = PLATFORM_DEVID_AUTO; | |
411 | } | |
412 | ||
413 | while (--i >= 0) { | |
414 | struct resource *r = &pdev->resource[i]; | |
7f5dcaf1 | 415 | if (r->parent) |
8b2dceba GKH |
416 | release_resource(r); |
417 | } | |
c9f66169 | 418 | |
5da7f709 | 419 | err_out: |
1da177e4 LT |
420 | return ret; |
421 | } | |
37c12e74 RK |
422 | EXPORT_SYMBOL_GPL(platform_device_add); |
423 | ||
424 | /** | |
4a3ad20c GKH |
425 | * platform_device_del - remove a platform-level device |
426 | * @pdev: platform device we're removing | |
1da177e4 | 427 | * |
4a3ad20c GKH |
428 | * Note that this function will also release all memory- and port-based |
429 | * resources owned by the device (@dev->resource). This function must | |
430 | * _only_ be externally called in error cases. All other usage is a bug. | |
1da177e4 | 431 | */ |
93ce3061 | 432 | void platform_device_del(struct platform_device *pdev) |
1da177e4 | 433 | { |
8b2dceba | 434 | int i; |
c9f66169 | 435 | |
8b2dceba GKH |
436 | if (pdev) { |
437 | device_del(&pdev->dev); | |
438 | ||
439 | if (pdev->id_auto) { | |
440 | ida_simple_remove(&platform_devid_ida, pdev->id); | |
441 | pdev->id = PLATFORM_DEVID_AUTO; | |
442 | } | |
443 | ||
444 | for (i = 0; i < pdev->num_resources; i++) { | |
445 | struct resource *r = &pdev->resource[i]; | |
7f5dcaf1 | 446 | if (r->parent) |
8b2dceba GKH |
447 | release_resource(r); |
448 | } | |
00bbc1d8 MW |
449 | |
450 | device_remove_property_set(&pdev->dev); | |
8b2dceba | 451 | } |
1da177e4 | 452 | } |
93ce3061 DT |
453 | EXPORT_SYMBOL_GPL(platform_device_del); |
454 | ||
455 | /** | |
4a3ad20c GKH |
456 | * platform_device_register - add a platform-level device |
457 | * @pdev: platform device we're adding | |
93ce3061 | 458 | */ |
4a3ad20c | 459 | int platform_device_register(struct platform_device *pdev) |
93ce3061 DT |
460 | { |
461 | device_initialize(&pdev->dev); | |
a77ce816 | 462 | arch_setup_pdev_archdata(pdev); |
93ce3061 DT |
463 | return platform_device_add(pdev); |
464 | } | |
a96b2042 | 465 | EXPORT_SYMBOL_GPL(platform_device_register); |
93ce3061 DT |
466 | |
467 | /** | |
4a3ad20c GKH |
468 | * platform_device_unregister - unregister a platform-level device |
469 | * @pdev: platform device we're unregistering | |
93ce3061 | 470 | * |
4a3ad20c GKH |
471 | * Unregistration is done in 2 steps. First we release all resources |
472 | * and remove it from the subsystem, then we drop reference count by | |
473 | * calling platform_device_put(). | |
93ce3061 | 474 | */ |
4a3ad20c | 475 | void platform_device_unregister(struct platform_device *pdev) |
93ce3061 DT |
476 | { |
477 | platform_device_del(pdev); | |
478 | platform_device_put(pdev); | |
479 | } | |
a96b2042 | 480 | EXPORT_SYMBOL_GPL(platform_device_unregister); |
1da177e4 | 481 | |
1da177e4 | 482 | /** |
01dcc60a | 483 | * platform_device_register_full - add a platform-level device with |
44f28bde | 484 | * resources and platform-specific data |
49a4ec18 | 485 | * |
01dcc60a | 486 | * @pdevinfo: data used to create device |
d8bf2540 | 487 | * |
f0eae0ed | 488 | * Returns &struct platform_device pointer on success, or ERR_PTR() on error. |
d8bf2540 | 489 | */ |
01dcc60a | 490 | struct platform_device *platform_device_register_full( |
5a3072be | 491 | const struct platform_device_info *pdevinfo) |
d8bf2540 | 492 | { |
44f28bde | 493 | int ret = -ENOMEM; |
d8bf2540 | 494 | struct platform_device *pdev; |
d8bf2540 | 495 | |
01dcc60a | 496 | pdev = platform_device_alloc(pdevinfo->name, pdevinfo->id); |
44f28bde | 497 | if (!pdev) |
01dcc60a UKK |
498 | goto err_alloc; |
499 | ||
500 | pdev->dev.parent = pdevinfo->parent; | |
ce793486 | 501 | pdev->dev.fwnode = pdevinfo->fwnode; |
01dcc60a UKK |
502 | |
503 | if (pdevinfo->dma_mask) { | |
504 | /* | |
505 | * This memory isn't freed when the device is put, | |
506 | * I don't have a nice idea for that though. Conceptually | |
507 | * dma_mask in struct device should not be a pointer. | |
508 | * See http://thread.gmane.org/gmane.linux.kernel.pci/9081 | |
509 | */ | |
510 | pdev->dev.dma_mask = | |
511 | kmalloc(sizeof(*pdev->dev.dma_mask), GFP_KERNEL); | |
512 | if (!pdev->dev.dma_mask) | |
513 | goto err; | |
514 | ||
515 | *pdev->dev.dma_mask = pdevinfo->dma_mask; | |
516 | pdev->dev.coherent_dma_mask = pdevinfo->dma_mask; | |
517 | } | |
d8bf2540 | 518 | |
01dcc60a UKK |
519 | ret = platform_device_add_resources(pdev, |
520 | pdevinfo->res, pdevinfo->num_res); | |
807508c8 AV |
521 | if (ret) |
522 | goto err; | |
44f28bde | 523 | |
01dcc60a UKK |
524 | ret = platform_device_add_data(pdev, |
525 | pdevinfo->data, pdevinfo->size_data); | |
807508c8 AV |
526 | if (ret) |
527 | goto err; | |
d8bf2540 | 528 | |
00bbc1d8 MW |
529 | if (pdevinfo->pset) { |
530 | ret = platform_device_add_properties(pdev, pdevinfo->pset); | |
531 | if (ret) | |
532 | goto err; | |
533 | } | |
534 | ||
44f28bde UKK |
535 | ret = platform_device_add(pdev); |
536 | if (ret) { | |
537 | err: | |
7b199811 | 538 | ACPI_COMPANION_SET(&pdev->dev, NULL); |
01dcc60a UKK |
539 | kfree(pdev->dev.dma_mask); |
540 | ||
541 | err_alloc: | |
44f28bde UKK |
542 | platform_device_put(pdev); |
543 | return ERR_PTR(ret); | |
544 | } | |
d8bf2540 DES |
545 | |
546 | return pdev; | |
d8bf2540 | 547 | } |
01dcc60a | 548 | EXPORT_SYMBOL_GPL(platform_device_register_full); |
d8bf2540 | 549 | |
00d3dcdd RK |
550 | static int platform_drv_probe(struct device *_dev) |
551 | { | |
552 | struct platform_driver *drv = to_platform_driver(_dev->driver); | |
553 | struct platform_device *dev = to_platform_device(_dev); | |
94d76d5d | 554 | int ret; |
00d3dcdd | 555 | |
86be408b SN |
556 | ret = of_clk_set_defaults(_dev->of_node, false); |
557 | if (ret < 0) | |
558 | return ret; | |
559 | ||
cb518413 | 560 | ret = dev_pm_domain_attach(_dev, true); |
b8b2c7d8 | 561 | if (ret != -EPROBE_DEFER && drv->probe) { |
cb518413 UH |
562 | ret = drv->probe(dev); |
563 | if (ret) | |
564 | dev_pm_domain_detach(_dev, true); | |
565 | } | |
94d76d5d | 566 | |
3f9120b0 JH |
567 | if (drv->prevent_deferred_probe && ret == -EPROBE_DEFER) { |
568 | dev_warn(_dev, "probe deferral not supported\n"); | |
569 | ret = -ENXIO; | |
570 | } | |
571 | ||
94d76d5d | 572 | return ret; |
00d3dcdd RK |
573 | } |
574 | ||
c67334fb DB |
575 | static int platform_drv_probe_fail(struct device *_dev) |
576 | { | |
577 | return -ENXIO; | |
578 | } | |
579 | ||
00d3dcdd RK |
580 | static int platform_drv_remove(struct device *_dev) |
581 | { | |
582 | struct platform_driver *drv = to_platform_driver(_dev->driver); | |
583 | struct platform_device *dev = to_platform_device(_dev); | |
b8b2c7d8 | 584 | int ret = 0; |
00d3dcdd | 585 | |
b8b2c7d8 UKK |
586 | if (drv->remove) |
587 | ret = drv->remove(dev); | |
cb518413 | 588 | dev_pm_domain_detach(_dev, true); |
94d76d5d RW |
589 | |
590 | return ret; | |
00d3dcdd RK |
591 | } |
592 | ||
593 | static void platform_drv_shutdown(struct device *_dev) | |
594 | { | |
595 | struct platform_driver *drv = to_platform_driver(_dev->driver); | |
596 | struct platform_device *dev = to_platform_device(_dev); | |
597 | ||
b8b2c7d8 UKK |
598 | if (drv->shutdown) |
599 | drv->shutdown(dev); | |
00d3dcdd RK |
600 | } |
601 | ||
00d3dcdd | 602 | /** |
9447057e | 603 | * __platform_driver_register - register a driver for platform-level devices |
4a3ad20c | 604 | * @drv: platform driver structure |
08801f96 | 605 | * @owner: owning module/driver |
00d3dcdd | 606 | */ |
9447057e LC |
607 | int __platform_driver_register(struct platform_driver *drv, |
608 | struct module *owner) | |
00d3dcdd | 609 | { |
9447057e | 610 | drv->driver.owner = owner; |
00d3dcdd | 611 | drv->driver.bus = &platform_bus_type; |
b8b2c7d8 UKK |
612 | drv->driver.probe = platform_drv_probe; |
613 | drv->driver.remove = platform_drv_remove; | |
614 | drv->driver.shutdown = platform_drv_shutdown; | |
783ea7d4 | 615 | |
00d3dcdd RK |
616 | return driver_register(&drv->driver); |
617 | } | |
9447057e | 618 | EXPORT_SYMBOL_GPL(__platform_driver_register); |
00d3dcdd RK |
619 | |
620 | /** | |
3c31f07a | 621 | * platform_driver_unregister - unregister a driver for platform-level devices |
4a3ad20c | 622 | * @drv: platform driver structure |
00d3dcdd RK |
623 | */ |
624 | void platform_driver_unregister(struct platform_driver *drv) | |
625 | { | |
626 | driver_unregister(&drv->driver); | |
627 | } | |
628 | EXPORT_SYMBOL_GPL(platform_driver_unregister); | |
629 | ||
c67334fb | 630 | /** |
c3b50dc2 | 631 | * __platform_driver_probe - register driver for non-hotpluggable device |
c67334fb | 632 | * @drv: platform driver structure |
3f9120b0 | 633 | * @probe: the driver probe routine, probably from an __init section |
c3b50dc2 | 634 | * @module: module which will be the owner of the driver |
c67334fb DB |
635 | * |
636 | * Use this instead of platform_driver_register() when you know the device | |
637 | * is not hotpluggable and has already been registered, and you want to | |
638 | * remove its run-once probe() infrastructure from memory after the driver | |
639 | * has bound to the device. | |
640 | * | |
641 | * One typical use for this would be with drivers for controllers integrated | |
642 | * into system-on-chip processors, where the controller devices have been | |
643 | * configured as part of board setup. | |
644 | * | |
3f9120b0 | 645 | * Note that this is incompatible with deferred probing. |
647c86d0 | 646 | * |
c67334fb DB |
647 | * Returns zero if the driver registered and bound to a device, else returns |
648 | * a negative error code and with the driver not registered. | |
649 | */ | |
c3b50dc2 WS |
650 | int __init_or_module __platform_driver_probe(struct platform_driver *drv, |
651 | int (*probe)(struct platform_device *), struct module *module) | |
c67334fb DB |
652 | { |
653 | int retval, code; | |
654 | ||
5c36eb2a DT |
655 | if (drv->driver.probe_type == PROBE_PREFER_ASYNCHRONOUS) { |
656 | pr_err("%s: drivers registered with %s can not be probed asynchronously\n", | |
657 | drv->driver.name, __func__); | |
658 | return -EINVAL; | |
659 | } | |
660 | ||
661 | /* | |
662 | * We have to run our probes synchronously because we check if | |
663 | * we find any devices to bind to and exit with error if there | |
664 | * are any. | |
665 | */ | |
666 | drv->driver.probe_type = PROBE_FORCE_SYNCHRONOUS; | |
667 | ||
3f9120b0 JH |
668 | /* |
669 | * Prevent driver from requesting probe deferral to avoid further | |
670 | * futile probe attempts. | |
671 | */ | |
672 | drv->prevent_deferred_probe = true; | |
673 | ||
1a6f2a75 DT |
674 | /* make sure driver won't have bind/unbind attributes */ |
675 | drv->driver.suppress_bind_attrs = true; | |
676 | ||
c67334fb DB |
677 | /* temporary section violation during probe() */ |
678 | drv->probe = probe; | |
c3b50dc2 | 679 | retval = code = __platform_driver_register(drv, module); |
c67334fb | 680 | |
1a6f2a75 DT |
681 | /* |
682 | * Fixup that section violation, being paranoid about code scanning | |
c67334fb DB |
683 | * the list of drivers in order to probe new devices. Check to see |
684 | * if the probe was successful, and make sure any forced probes of | |
685 | * new devices fail. | |
686 | */ | |
d79d3244 | 687 | spin_lock(&drv->driver.bus->p->klist_drivers.k_lock); |
c67334fb | 688 | drv->probe = NULL; |
e5dd1278 | 689 | if (code == 0 && list_empty(&drv->driver.p->klist_devices.k_list)) |
c67334fb DB |
690 | retval = -ENODEV; |
691 | drv->driver.probe = platform_drv_probe_fail; | |
d79d3244 | 692 | spin_unlock(&drv->driver.bus->p->klist_drivers.k_lock); |
c67334fb DB |
693 | |
694 | if (code != retval) | |
695 | platform_driver_unregister(drv); | |
696 | return retval; | |
697 | } | |
c3b50dc2 | 698 | EXPORT_SYMBOL_GPL(__platform_driver_probe); |
1da177e4 | 699 | |
ecdf6ceb | 700 | /** |
291f653a | 701 | * __platform_create_bundle - register driver and create corresponding device |
ecdf6ceb DT |
702 | * @driver: platform driver structure |
703 | * @probe: the driver probe routine, probably from an __init section | |
704 | * @res: set of resources that needs to be allocated for the device | |
705 | * @n_res: number of resources | |
706 | * @data: platform specific data for this platform device | |
707 | * @size: size of platform specific data | |
291f653a | 708 | * @module: module which will be the owner of the driver |
ecdf6ceb DT |
709 | * |
710 | * Use this in legacy-style modules that probe hardware directly and | |
711 | * register a single platform device and corresponding platform driver. | |
f0eae0ed JN |
712 | * |
713 | * Returns &struct platform_device pointer on success, or ERR_PTR() on error. | |
ecdf6ceb | 714 | */ |
291f653a | 715 | struct platform_device * __init_or_module __platform_create_bundle( |
ecdf6ceb DT |
716 | struct platform_driver *driver, |
717 | int (*probe)(struct platform_device *), | |
718 | struct resource *res, unsigned int n_res, | |
291f653a | 719 | const void *data, size_t size, struct module *module) |
ecdf6ceb DT |
720 | { |
721 | struct platform_device *pdev; | |
722 | int error; | |
723 | ||
724 | pdev = platform_device_alloc(driver->driver.name, -1); | |
725 | if (!pdev) { | |
726 | error = -ENOMEM; | |
727 | goto err_out; | |
728 | } | |
729 | ||
807508c8 AV |
730 | error = platform_device_add_resources(pdev, res, n_res); |
731 | if (error) | |
732 | goto err_pdev_put; | |
ecdf6ceb | 733 | |
807508c8 AV |
734 | error = platform_device_add_data(pdev, data, size); |
735 | if (error) | |
736 | goto err_pdev_put; | |
ecdf6ceb DT |
737 | |
738 | error = platform_device_add(pdev); | |
739 | if (error) | |
740 | goto err_pdev_put; | |
741 | ||
291f653a | 742 | error = __platform_driver_probe(driver, probe, module); |
ecdf6ceb DT |
743 | if (error) |
744 | goto err_pdev_del; | |
745 | ||
746 | return pdev; | |
747 | ||
748 | err_pdev_del: | |
749 | platform_device_del(pdev); | |
750 | err_pdev_put: | |
751 | platform_device_put(pdev); | |
752 | err_out: | |
753 | return ERR_PTR(error); | |
754 | } | |
291f653a | 755 | EXPORT_SYMBOL_GPL(__platform_create_bundle); |
ecdf6ceb | 756 | |
dbe2256d TR |
757 | /** |
758 | * __platform_register_drivers - register an array of platform drivers | |
759 | * @drivers: an array of drivers to register | |
760 | * @count: the number of drivers to register | |
761 | * @owner: module owning the drivers | |
762 | * | |
763 | * Registers platform drivers specified by an array. On failure to register a | |
764 | * driver, all previously registered drivers will be unregistered. Callers of | |
765 | * this API should use platform_unregister_drivers() to unregister drivers in | |
766 | * the reverse order. | |
767 | * | |
768 | * Returns: 0 on success or a negative error code on failure. | |
769 | */ | |
770 | int __platform_register_drivers(struct platform_driver * const *drivers, | |
771 | unsigned int count, struct module *owner) | |
772 | { | |
773 | unsigned int i; | |
774 | int err; | |
775 | ||
776 | for (i = 0; i < count; i++) { | |
777 | pr_debug("registering platform driver %ps\n", drivers[i]); | |
778 | ||
779 | err = __platform_driver_register(drivers[i], owner); | |
780 | if (err < 0) { | |
781 | pr_err("failed to register platform driver %ps: %d\n", | |
782 | drivers[i], err); | |
783 | goto error; | |
784 | } | |
785 | } | |
786 | ||
787 | return 0; | |
788 | ||
789 | error: | |
790 | while (i--) { | |
791 | pr_debug("unregistering platform driver %ps\n", drivers[i]); | |
792 | platform_driver_unregister(drivers[i]); | |
793 | } | |
794 | ||
795 | return err; | |
796 | } | |
797 | EXPORT_SYMBOL_GPL(__platform_register_drivers); | |
798 | ||
799 | /** | |
800 | * platform_unregister_drivers - unregister an array of platform drivers | |
801 | * @drivers: an array of drivers to unregister | |
802 | * @count: the number of drivers to unregister | |
803 | * | |
804 | * Unegisters platform drivers specified by an array. This is typically used | |
805 | * to complement an earlier call to platform_register_drivers(). Drivers are | |
806 | * unregistered in the reverse order in which they were registered. | |
807 | */ | |
808 | void platform_unregister_drivers(struct platform_driver * const *drivers, | |
809 | unsigned int count) | |
810 | { | |
811 | while (count--) { | |
812 | pr_debug("unregistering platform driver %ps\n", drivers[count]); | |
813 | platform_driver_unregister(drivers[count]); | |
814 | } | |
815 | } | |
816 | EXPORT_SYMBOL_GPL(platform_unregister_drivers); | |
817 | ||
a0245f7a DB |
818 | /* modalias support enables more hands-off userspace setup: |
819 | * (a) environment variable lets new-style hotplug events work once system is | |
820 | * fully running: "modprobe $MODALIAS" | |
821 | * (b) sysfs attribute lets new-style coldplug recover from hotplug events | |
822 | * mishandled before system is fully running: "modprobe $(cat modalias)" | |
823 | */ | |
4a3ad20c GKH |
824 | static ssize_t modalias_show(struct device *dev, struct device_attribute *a, |
825 | char *buf) | |
a0245f7a DB |
826 | { |
827 | struct platform_device *pdev = to_platform_device(dev); | |
8c4ff6d0 ZR |
828 | int len; |
829 | ||
b9f73067 ZR |
830 | len = of_device_get_modalias(dev, buf, PAGE_SIZE -1); |
831 | if (len != -ENODEV) | |
832 | return len; | |
833 | ||
8c4ff6d0 ZR |
834 | len = acpi_device_modalias(dev, buf, PAGE_SIZE -1); |
835 | if (len != -ENODEV) | |
836 | return len; | |
837 | ||
838 | len = snprintf(buf, PAGE_SIZE, "platform:%s\n", pdev->name); | |
a0245f7a DB |
839 | |
840 | return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len; | |
841 | } | |
d06262e5 | 842 | static DEVICE_ATTR_RO(modalias); |
a0245f7a | 843 | |
3d713e0e KP |
844 | static ssize_t driver_override_store(struct device *dev, |
845 | struct device_attribute *attr, | |
846 | const char *buf, size_t count) | |
847 | { | |
848 | struct platform_device *pdev = to_platform_device(dev); | |
849 | char *driver_override, *old = pdev->driver_override, *cp; | |
850 | ||
851 | if (count > PATH_MAX) | |
852 | return -EINVAL; | |
853 | ||
854 | driver_override = kstrndup(buf, count, GFP_KERNEL); | |
855 | if (!driver_override) | |
856 | return -ENOMEM; | |
857 | ||
858 | cp = strchr(driver_override, '\n'); | |
859 | if (cp) | |
860 | *cp = '\0'; | |
861 | ||
862 | if (strlen(driver_override)) { | |
863 | pdev->driver_override = driver_override; | |
864 | } else { | |
865 | kfree(driver_override); | |
866 | pdev->driver_override = NULL; | |
867 | } | |
868 | ||
869 | kfree(old); | |
870 | ||
871 | return count; | |
872 | } | |
873 | ||
874 | static ssize_t driver_override_show(struct device *dev, | |
875 | struct device_attribute *attr, char *buf) | |
876 | { | |
877 | struct platform_device *pdev = to_platform_device(dev); | |
878 | ||
879 | return sprintf(buf, "%s\n", pdev->driver_override); | |
880 | } | |
881 | static DEVICE_ATTR_RW(driver_override); | |
882 | ||
883 | ||
d06262e5 GKH |
884 | static struct attribute *platform_dev_attrs[] = { |
885 | &dev_attr_modalias.attr, | |
3d713e0e | 886 | &dev_attr_driver_override.attr, |
d06262e5 | 887 | NULL, |
a0245f7a | 888 | }; |
d06262e5 | 889 | ATTRIBUTE_GROUPS(platform_dev); |
a0245f7a | 890 | |
7eff2e7a | 891 | static int platform_uevent(struct device *dev, struct kobj_uevent_env *env) |
a0245f7a DB |
892 | { |
893 | struct platform_device *pdev = to_platform_device(dev); | |
eca39301 GL |
894 | int rc; |
895 | ||
896 | /* Some devices have extra OF data and an OF-style MODALIAS */ | |
0258e182 | 897 | rc = of_device_uevent_modalias(dev, env); |
eca39301 GL |
898 | if (rc != -ENODEV) |
899 | return rc; | |
a0245f7a | 900 | |
8c4ff6d0 ZR |
901 | rc = acpi_device_uevent_modalias(dev, env); |
902 | if (rc != -ENODEV) | |
903 | return rc; | |
904 | ||
57fee4a5 | 905 | add_uevent_var(env, "MODALIAS=%s%s", PLATFORM_MODULE_PREFIX, |
0a26813c | 906 | pdev->name); |
a0245f7a DB |
907 | return 0; |
908 | } | |
909 | ||
57fee4a5 | 910 | static const struct platform_device_id *platform_match_id( |
831fad2f | 911 | const struct platform_device_id *id, |
57fee4a5 EM |
912 | struct platform_device *pdev) |
913 | { | |
914 | while (id->name[0]) { | |
915 | if (strcmp(pdev->name, id->name) == 0) { | |
916 | pdev->id_entry = id; | |
917 | return id; | |
918 | } | |
919 | id++; | |
920 | } | |
921 | return NULL; | |
922 | } | |
923 | ||
1da177e4 | 924 | /** |
4a3ad20c GKH |
925 | * platform_match - bind platform device to platform driver. |
926 | * @dev: device. | |
927 | * @drv: driver. | |
1da177e4 | 928 | * |
4a3ad20c GKH |
929 | * Platform device IDs are assumed to be encoded like this: |
930 | * "<name><instance>", where <name> is a short description of the type of | |
931 | * device, like "pci" or "floppy", and <instance> is the enumerated | |
932 | * instance of the device, like '0' or '42'. Driver IDs are simply | |
933 | * "<name>". So, extract the <name> from the platform_device structure, | |
934 | * and compare it against the name of the driver. Return whether they match | |
935 | * or not. | |
1da177e4 | 936 | */ |
4a3ad20c | 937 | static int platform_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 938 | { |
71b3e0c1 | 939 | struct platform_device *pdev = to_platform_device(dev); |
57fee4a5 EM |
940 | struct platform_driver *pdrv = to_platform_driver(drv); |
941 | ||
3d713e0e KP |
942 | /* When driver_override is set, only bind to the matching driver */ |
943 | if (pdev->driver_override) | |
944 | return !strcmp(pdev->driver_override, drv->name); | |
945 | ||
05212157 GL |
946 | /* Attempt an OF style match first */ |
947 | if (of_driver_match_device(dev, drv)) | |
948 | return 1; | |
949 | ||
91e56878 MW |
950 | /* Then try ACPI style match */ |
951 | if (acpi_driver_match_device(dev, drv)) | |
952 | return 1; | |
953 | ||
05212157 | 954 | /* Then try to match against the id table */ |
57fee4a5 EM |
955 | if (pdrv->id_table) |
956 | return platform_match_id(pdrv->id_table, pdev) != NULL; | |
1da177e4 | 957 | |
57fee4a5 | 958 | /* fall-back to driver name match */ |
1e0b2cf9 | 959 | return (strcmp(pdev->name, drv->name) == 0); |
1da177e4 LT |
960 | } |
961 | ||
25e18499 RW |
962 | #ifdef CONFIG_PM_SLEEP |
963 | ||
964 | static int platform_legacy_suspend(struct device *dev, pm_message_t mesg) | |
1da177e4 | 965 | { |
783ea7d4 MD |
966 | struct platform_driver *pdrv = to_platform_driver(dev->driver); |
967 | struct platform_device *pdev = to_platform_device(dev); | |
1da177e4 LT |
968 | int ret = 0; |
969 | ||
783ea7d4 MD |
970 | if (dev->driver && pdrv->suspend) |
971 | ret = pdrv->suspend(pdev, mesg); | |
386415d8 DB |
972 | |
973 | return ret; | |
974 | } | |
975 | ||
25e18499 | 976 | static int platform_legacy_resume(struct device *dev) |
1da177e4 | 977 | { |
783ea7d4 MD |
978 | struct platform_driver *pdrv = to_platform_driver(dev->driver); |
979 | struct platform_device *pdev = to_platform_device(dev); | |
1da177e4 LT |
980 | int ret = 0; |
981 | ||
783ea7d4 MD |
982 | if (dev->driver && pdrv->resume) |
983 | ret = pdrv->resume(pdev); | |
9480e307 | 984 | |
1da177e4 LT |
985 | return ret; |
986 | } | |
987 | ||
69c9dd1e | 988 | #endif /* CONFIG_PM_SLEEP */ |
9d730229 | 989 | |
25e18499 RW |
990 | #ifdef CONFIG_SUSPEND |
991 | ||
69c9dd1e | 992 | int platform_pm_suspend(struct device *dev) |
25e18499 RW |
993 | { |
994 | struct device_driver *drv = dev->driver; | |
995 | int ret = 0; | |
996 | ||
adf09493 RW |
997 | if (!drv) |
998 | return 0; | |
999 | ||
1000 | if (drv->pm) { | |
25e18499 RW |
1001 | if (drv->pm->suspend) |
1002 | ret = drv->pm->suspend(dev); | |
1003 | } else { | |
1004 | ret = platform_legacy_suspend(dev, PMSG_SUSPEND); | |
1005 | } | |
1006 | ||
1007 | return ret; | |
1008 | } | |
1009 | ||
69c9dd1e | 1010 | int platform_pm_resume(struct device *dev) |
25e18499 RW |
1011 | { |
1012 | struct device_driver *drv = dev->driver; | |
1013 | int ret = 0; | |
1014 | ||
adf09493 RW |
1015 | if (!drv) |
1016 | return 0; | |
1017 | ||
1018 | if (drv->pm) { | |
25e18499 RW |
1019 | if (drv->pm->resume) |
1020 | ret = drv->pm->resume(dev); | |
1021 | } else { | |
1022 | ret = platform_legacy_resume(dev); | |
1023 | } | |
1024 | ||
1025 | return ret; | |
1026 | } | |
1027 | ||
69c9dd1e | 1028 | #endif /* CONFIG_SUSPEND */ |
25e18499 | 1029 | |
1f112cee | 1030 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
25e18499 | 1031 | |
69c9dd1e | 1032 | int platform_pm_freeze(struct device *dev) |
25e18499 RW |
1033 | { |
1034 | struct device_driver *drv = dev->driver; | |
1035 | int ret = 0; | |
1036 | ||
1037 | if (!drv) | |
1038 | return 0; | |
1039 | ||
1040 | if (drv->pm) { | |
1041 | if (drv->pm->freeze) | |
1042 | ret = drv->pm->freeze(dev); | |
1043 | } else { | |
1044 | ret = platform_legacy_suspend(dev, PMSG_FREEZE); | |
1045 | } | |
1046 | ||
1047 | return ret; | |
1048 | } | |
1049 | ||
69c9dd1e | 1050 | int platform_pm_thaw(struct device *dev) |
25e18499 RW |
1051 | { |
1052 | struct device_driver *drv = dev->driver; | |
1053 | int ret = 0; | |
1054 | ||
adf09493 RW |
1055 | if (!drv) |
1056 | return 0; | |
1057 | ||
1058 | if (drv->pm) { | |
25e18499 RW |
1059 | if (drv->pm->thaw) |
1060 | ret = drv->pm->thaw(dev); | |
1061 | } else { | |
1062 | ret = platform_legacy_resume(dev); | |
1063 | } | |
1064 | ||
1065 | return ret; | |
1066 | } | |
1067 | ||
69c9dd1e | 1068 | int platform_pm_poweroff(struct device *dev) |
25e18499 RW |
1069 | { |
1070 | struct device_driver *drv = dev->driver; | |
1071 | int ret = 0; | |
1072 | ||
adf09493 RW |
1073 | if (!drv) |
1074 | return 0; | |
1075 | ||
1076 | if (drv->pm) { | |
25e18499 RW |
1077 | if (drv->pm->poweroff) |
1078 | ret = drv->pm->poweroff(dev); | |
1079 | } else { | |
1080 | ret = platform_legacy_suspend(dev, PMSG_HIBERNATE); | |
1081 | } | |
1082 | ||
1083 | return ret; | |
1084 | } | |
1085 | ||
69c9dd1e | 1086 | int platform_pm_restore(struct device *dev) |
25e18499 RW |
1087 | { |
1088 | struct device_driver *drv = dev->driver; | |
1089 | int ret = 0; | |
1090 | ||
adf09493 RW |
1091 | if (!drv) |
1092 | return 0; | |
1093 | ||
1094 | if (drv->pm) { | |
25e18499 RW |
1095 | if (drv->pm->restore) |
1096 | ret = drv->pm->restore(dev); | |
1097 | } else { | |
1098 | ret = platform_legacy_resume(dev); | |
1099 | } | |
1100 | ||
1101 | return ret; | |
1102 | } | |
1103 | ||
69c9dd1e | 1104 | #endif /* CONFIG_HIBERNATE_CALLBACKS */ |
25e18499 | 1105 | |
d9ab7716 | 1106 | static const struct dev_pm_ops platform_dev_pm_ops = { |
8b313a38 RW |
1107 | .runtime_suspend = pm_generic_runtime_suspend, |
1108 | .runtime_resume = pm_generic_runtime_resume, | |
69c9dd1e | 1109 | USE_PLATFORM_PM_SLEEP_OPS |
25e18499 RW |
1110 | }; |
1111 | ||
1da177e4 LT |
1112 | struct bus_type platform_bus_type = { |
1113 | .name = "platform", | |
d06262e5 | 1114 | .dev_groups = platform_dev_groups, |
1da177e4 | 1115 | .match = platform_match, |
a0245f7a | 1116 | .uevent = platform_uevent, |
9d730229 | 1117 | .pm = &platform_dev_pm_ops, |
1da177e4 | 1118 | }; |
a96b2042 | 1119 | EXPORT_SYMBOL_GPL(platform_bus_type); |
1da177e4 LT |
1120 | |
1121 | int __init platform_bus_init(void) | |
1122 | { | |
fbfb1445 CH |
1123 | int error; |
1124 | ||
13977091 MD |
1125 | early_platform_cleanup(); |
1126 | ||
fbfb1445 CH |
1127 | error = device_register(&platform_bus); |
1128 | if (error) | |
1129 | return error; | |
1130 | error = bus_register(&platform_bus_type); | |
1131 | if (error) | |
1132 | device_unregister(&platform_bus); | |
801d728c | 1133 | of_platform_register_reconfig_notifier(); |
fbfb1445 | 1134 | return error; |
1da177e4 LT |
1135 | } |
1136 | ||
1137 | #ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK | |
1138 | u64 dma_get_required_mask(struct device *dev) | |
1139 | { | |
1140 | u32 low_totalram = ((max_pfn - 1) << PAGE_SHIFT); | |
1141 | u32 high_totalram = ((max_pfn - 1) >> (32 - PAGE_SHIFT)); | |
1142 | u64 mask; | |
1143 | ||
1144 | if (!high_totalram) { | |
1145 | /* convert to mask just covering totalram */ | |
1146 | low_totalram = (1 << (fls(low_totalram) - 1)); | |
1147 | low_totalram += low_totalram - 1; | |
1148 | mask = low_totalram; | |
1149 | } else { | |
1150 | high_totalram = (1 << (fls(high_totalram) - 1)); | |
1151 | high_totalram += high_totalram - 1; | |
1152 | mask = (((u64)high_totalram) << 32) + 0xffffffff; | |
1153 | } | |
e88a0c2c | 1154 | return mask; |
1da177e4 LT |
1155 | } |
1156 | EXPORT_SYMBOL_GPL(dma_get_required_mask); | |
1157 | #endif | |
13977091 MD |
1158 | |
1159 | static __initdata LIST_HEAD(early_platform_driver_list); | |
1160 | static __initdata LIST_HEAD(early_platform_device_list); | |
1161 | ||
1162 | /** | |
4d26e139 | 1163 | * early_platform_driver_register - register early platform driver |
d86c1302 | 1164 | * @epdrv: early_platform driver structure |
13977091 | 1165 | * @buf: string passed from early_param() |
4d26e139 MD |
1166 | * |
1167 | * Helper function for early_platform_init() / early_platform_init_buffer() | |
13977091 MD |
1168 | */ |
1169 | int __init early_platform_driver_register(struct early_platform_driver *epdrv, | |
1170 | char *buf) | |
1171 | { | |
c60e0504 | 1172 | char *tmp; |
13977091 MD |
1173 | int n; |
1174 | ||
1175 | /* Simply add the driver to the end of the global list. | |
1176 | * Drivers will by default be put on the list in compiled-in order. | |
1177 | */ | |
1178 | if (!epdrv->list.next) { | |
1179 | INIT_LIST_HEAD(&epdrv->list); | |
1180 | list_add_tail(&epdrv->list, &early_platform_driver_list); | |
1181 | } | |
1182 | ||
1183 | /* If the user has specified device then make sure the driver | |
1184 | * gets prioritized. The driver of the last device specified on | |
1185 | * command line will be put first on the list. | |
1186 | */ | |
1187 | n = strlen(epdrv->pdrv->driver.name); | |
1188 | if (buf && !strncmp(buf, epdrv->pdrv->driver.name, n)) { | |
1189 | list_move(&epdrv->list, &early_platform_driver_list); | |
1190 | ||
c60e0504 MD |
1191 | /* Allow passing parameters after device name */ |
1192 | if (buf[n] == '\0' || buf[n] == ',') | |
13977091 | 1193 | epdrv->requested_id = -1; |
c60e0504 MD |
1194 | else { |
1195 | epdrv->requested_id = simple_strtoul(&buf[n + 1], | |
1196 | &tmp, 10); | |
1197 | ||
1198 | if (buf[n] != '.' || (tmp == &buf[n + 1])) { | |
1199 | epdrv->requested_id = EARLY_PLATFORM_ID_ERROR; | |
1200 | n = 0; | |
1201 | } else | |
1202 | n += strcspn(&buf[n + 1], ",") + 1; | |
1203 | } | |
1204 | ||
1205 | if (buf[n] == ',') | |
1206 | n++; | |
1207 | ||
1208 | if (epdrv->bufsize) { | |
1209 | memcpy(epdrv->buffer, &buf[n], | |
1210 | min_t(int, epdrv->bufsize, strlen(&buf[n]) + 1)); | |
1211 | epdrv->buffer[epdrv->bufsize - 1] = '\0'; | |
1212 | } | |
13977091 MD |
1213 | } |
1214 | ||
1215 | return 0; | |
1216 | } | |
1217 | ||
1218 | /** | |
4d26e139 | 1219 | * early_platform_add_devices - adds a number of early platform devices |
13977091 MD |
1220 | * @devs: array of early platform devices to add |
1221 | * @num: number of early platform devices in array | |
4d26e139 MD |
1222 | * |
1223 | * Used by early architecture code to register early platform devices and | |
1224 | * their platform data. | |
13977091 MD |
1225 | */ |
1226 | void __init early_platform_add_devices(struct platform_device **devs, int num) | |
1227 | { | |
1228 | struct device *dev; | |
1229 | int i; | |
1230 | ||
1231 | /* simply add the devices to list */ | |
1232 | for (i = 0; i < num; i++) { | |
1233 | dev = &devs[i]->dev; | |
1234 | ||
1235 | if (!dev->devres_head.next) { | |
bed2b42d | 1236 | pm_runtime_early_init(dev); |
13977091 MD |
1237 | INIT_LIST_HEAD(&dev->devres_head); |
1238 | list_add_tail(&dev->devres_head, | |
1239 | &early_platform_device_list); | |
1240 | } | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | /** | |
4d26e139 | 1245 | * early_platform_driver_register_all - register early platform drivers |
13977091 | 1246 | * @class_str: string to identify early platform driver class |
4d26e139 MD |
1247 | * |
1248 | * Used by architecture code to register all early platform drivers | |
1249 | * for a certain class. If omitted then only early platform drivers | |
1250 | * with matching kernel command line class parameters will be registered. | |
13977091 MD |
1251 | */ |
1252 | void __init early_platform_driver_register_all(char *class_str) | |
1253 | { | |
1254 | /* The "class_str" parameter may or may not be present on the kernel | |
1255 | * command line. If it is present then there may be more than one | |
1256 | * matching parameter. | |
1257 | * | |
1258 | * Since we register our early platform drivers using early_param() | |
1259 | * we need to make sure that they also get registered in the case | |
1260 | * when the parameter is missing from the kernel command line. | |
1261 | * | |
1262 | * We use parse_early_options() to make sure the early_param() gets | |
1263 | * called at least once. The early_param() may be called more than | |
1264 | * once since the name of the preferred device may be specified on | |
1265 | * the kernel command line. early_platform_driver_register() handles | |
1266 | * this case for us. | |
1267 | */ | |
1268 | parse_early_options(class_str); | |
1269 | } | |
1270 | ||
1271 | /** | |
4d26e139 | 1272 | * early_platform_match - find early platform device matching driver |
d86c1302 | 1273 | * @epdrv: early platform driver structure |
13977091 MD |
1274 | * @id: id to match against |
1275 | */ | |
a8257910 | 1276 | static struct platform_device * __init |
13977091 MD |
1277 | early_platform_match(struct early_platform_driver *epdrv, int id) |
1278 | { | |
1279 | struct platform_device *pd; | |
1280 | ||
1281 | list_for_each_entry(pd, &early_platform_device_list, dev.devres_head) | |
1282 | if (platform_match(&pd->dev, &epdrv->pdrv->driver)) | |
1283 | if (pd->id == id) | |
1284 | return pd; | |
1285 | ||
1286 | return NULL; | |
1287 | } | |
1288 | ||
1289 | /** | |
4d26e139 | 1290 | * early_platform_left - check if early platform driver has matching devices |
d86c1302 | 1291 | * @epdrv: early platform driver structure |
13977091 MD |
1292 | * @id: return true if id or above exists |
1293 | */ | |
a8257910 | 1294 | static int __init early_platform_left(struct early_platform_driver *epdrv, |
13977091 MD |
1295 | int id) |
1296 | { | |
1297 | struct platform_device *pd; | |
1298 | ||
1299 | list_for_each_entry(pd, &early_platform_device_list, dev.devres_head) | |
1300 | if (platform_match(&pd->dev, &epdrv->pdrv->driver)) | |
1301 | if (pd->id >= id) | |
1302 | return 1; | |
1303 | ||
1304 | return 0; | |
1305 | } | |
1306 | ||
1307 | /** | |
4d26e139 | 1308 | * early_platform_driver_probe_id - probe drivers matching class_str and id |
13977091 MD |
1309 | * @class_str: string to identify early platform driver class |
1310 | * @id: id to match against | |
1311 | * @nr_probe: number of platform devices to successfully probe before exiting | |
1312 | */ | |
1313 | static int __init early_platform_driver_probe_id(char *class_str, | |
1314 | int id, | |
1315 | int nr_probe) | |
1316 | { | |
1317 | struct early_platform_driver *epdrv; | |
1318 | struct platform_device *match; | |
1319 | int match_id; | |
1320 | int n = 0; | |
1321 | int left = 0; | |
1322 | ||
1323 | list_for_each_entry(epdrv, &early_platform_driver_list, list) { | |
1324 | /* only use drivers matching our class_str */ | |
1325 | if (strcmp(class_str, epdrv->class_str)) | |
1326 | continue; | |
1327 | ||
1328 | if (id == -2) { | |
1329 | match_id = epdrv->requested_id; | |
1330 | left = 1; | |
1331 | ||
1332 | } else { | |
1333 | match_id = id; | |
1334 | left += early_platform_left(epdrv, id); | |
1335 | ||
1336 | /* skip requested id */ | |
1337 | switch (epdrv->requested_id) { | |
1338 | case EARLY_PLATFORM_ID_ERROR: | |
1339 | case EARLY_PLATFORM_ID_UNSET: | |
1340 | break; | |
1341 | default: | |
1342 | if (epdrv->requested_id == id) | |
1343 | match_id = EARLY_PLATFORM_ID_UNSET; | |
1344 | } | |
1345 | } | |
1346 | ||
1347 | switch (match_id) { | |
1348 | case EARLY_PLATFORM_ID_ERROR: | |
0258e182 FP |
1349 | pr_warn("%s: unable to parse %s parameter\n", |
1350 | class_str, epdrv->pdrv->driver.name); | |
13977091 MD |
1351 | /* fall-through */ |
1352 | case EARLY_PLATFORM_ID_UNSET: | |
1353 | match = NULL; | |
1354 | break; | |
1355 | default: | |
1356 | match = early_platform_match(epdrv, match_id); | |
1357 | } | |
1358 | ||
1359 | if (match) { | |
a636ee7f PM |
1360 | /* |
1361 | * Set up a sensible init_name to enable | |
1362 | * dev_name() and others to be used before the | |
1363 | * rest of the driver core is initialized. | |
1364 | */ | |
06fe53be | 1365 | if (!match->dev.init_name && slab_is_available()) { |
a636ee7f | 1366 | if (match->id != -1) |
bd05086b PM |
1367 | match->dev.init_name = |
1368 | kasprintf(GFP_KERNEL, "%s.%d", | |
1369 | match->name, | |
1370 | match->id); | |
a636ee7f | 1371 | else |
bd05086b PM |
1372 | match->dev.init_name = |
1373 | kasprintf(GFP_KERNEL, "%s", | |
1374 | match->name); | |
a636ee7f | 1375 | |
a636ee7f PM |
1376 | if (!match->dev.init_name) |
1377 | return -ENOMEM; | |
1378 | } | |
bd05086b | 1379 | |
13977091 | 1380 | if (epdrv->pdrv->probe(match)) |
0258e182 FP |
1381 | pr_warn("%s: unable to probe %s early.\n", |
1382 | class_str, match->name); | |
13977091 MD |
1383 | else |
1384 | n++; | |
1385 | } | |
1386 | ||
1387 | if (n >= nr_probe) | |
1388 | break; | |
1389 | } | |
1390 | ||
1391 | if (left) | |
1392 | return n; | |
1393 | else | |
1394 | return -ENODEV; | |
1395 | } | |
1396 | ||
1397 | /** | |
4d26e139 | 1398 | * early_platform_driver_probe - probe a class of registered drivers |
13977091 MD |
1399 | * @class_str: string to identify early platform driver class |
1400 | * @nr_probe: number of platform devices to successfully probe before exiting | |
1401 | * @user_only: only probe user specified early platform devices | |
4d26e139 MD |
1402 | * |
1403 | * Used by architecture code to probe registered early platform drivers | |
1404 | * within a certain class. For probe to happen a registered early platform | |
1405 | * device matching a registered early platform driver is needed. | |
13977091 MD |
1406 | */ |
1407 | int __init early_platform_driver_probe(char *class_str, | |
1408 | int nr_probe, | |
1409 | int user_only) | |
1410 | { | |
1411 | int k, n, i; | |
1412 | ||
1413 | n = 0; | |
1414 | for (i = -2; n < nr_probe; i++) { | |
1415 | k = early_platform_driver_probe_id(class_str, i, nr_probe - n); | |
1416 | ||
1417 | if (k < 0) | |
1418 | break; | |
1419 | ||
1420 | n += k; | |
1421 | ||
1422 | if (user_only) | |
1423 | break; | |
1424 | } | |
1425 | ||
1426 | return n; | |
1427 | } | |
1428 | ||
1429 | /** | |
1430 | * early_platform_cleanup - clean up early platform code | |
1431 | */ | |
1432 | void __init early_platform_cleanup(void) | |
1433 | { | |
1434 | struct platform_device *pd, *pd2; | |
1435 | ||
1436 | /* clean up the devres list used to chain devices */ | |
1437 | list_for_each_entry_safe(pd, pd2, &early_platform_device_list, | |
1438 | dev.devres_head) { | |
1439 | list_del(&pd->dev.devres_head); | |
1440 | memset(&pd->dev.devres_head, 0, sizeof(pd->dev.devres_head)); | |
1441 | } | |
1442 | } | |
1443 |