]>
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> |
f65ae29b | 30 | #include <linux/kmemleak.h> |
1da177e4 | 31 | |
a1bdc7aa | 32 | #include "base.h" |
bed2b42d | 33 | #include "power/power.h" |
a1bdc7aa | 34 | |
689ae231 JD |
35 | /* For automatically allocated device IDs */ |
36 | static DEFINE_IDA(platform_devid_ida); | |
37 | ||
1da177e4 | 38 | struct device platform_bus = { |
1e0b2cf9 | 39 | .init_name = "platform", |
1da177e4 | 40 | }; |
a96b2042 | 41 | EXPORT_SYMBOL_GPL(platform_bus); |
1da177e4 | 42 | |
a77ce816 KG |
43 | /** |
44 | * arch_setup_pdev_archdata - Allow manipulation of archdata before its used | |
7de636fa | 45 | * @pdev: platform device |
a77ce816 KG |
46 | * |
47 | * This is called before platform_device_add() such that any pdev_archdata may | |
48 | * be setup before the platform_notifier is called. So if a user needs to | |
49 | * manipulate any relevant information in the pdev_archdata they can do: | |
50 | * | |
b1d6d822 | 51 | * platform_device_alloc() |
0258e182 FP |
52 | * ... manipulate ... |
53 | * platform_device_add() | |
a77ce816 KG |
54 | * |
55 | * And if they don't care they can just call platform_device_register() and | |
56 | * everything will just work out. | |
57 | */ | |
58 | void __weak arch_setup_pdev_archdata(struct platform_device *pdev) | |
59 | { | |
60 | } | |
61 | ||
1da177e4 | 62 | /** |
4a3ad20c GKH |
63 | * platform_get_resource - get a resource for a device |
64 | * @dev: platform device | |
65 | * @type: resource type | |
66 | * @num: resource index | |
1da177e4 | 67 | */ |
4a3ad20c GKH |
68 | struct resource *platform_get_resource(struct platform_device *dev, |
69 | unsigned int type, unsigned int num) | |
1da177e4 LT |
70 | { |
71 | int i; | |
72 | ||
73 | for (i = 0; i < dev->num_resources; i++) { | |
74 | struct resource *r = &dev->resource[i]; | |
75 | ||
c9f66169 MD |
76 | if (type == resource_type(r) && num-- == 0) |
77 | return r; | |
1da177e4 LT |
78 | } |
79 | return NULL; | |
80 | } | |
a96b2042 | 81 | EXPORT_SYMBOL_GPL(platform_get_resource); |
1da177e4 LT |
82 | |
83 | /** | |
4a3ad20c GKH |
84 | * platform_get_irq - get an IRQ for a device |
85 | * @dev: platform device | |
86 | * @num: IRQ number index | |
1da177e4 LT |
87 | */ |
88 | int platform_get_irq(struct platform_device *dev, unsigned int num) | |
89 | { | |
5cf8f7db AL |
90 | #ifdef CONFIG_SPARC |
91 | /* sparc does not have irqs represented as IORESOURCE_IRQ resources */ | |
92 | if (!dev || num >= dev->archdata.num_irqs) | |
93 | return -ENXIO; | |
94 | return dev->archdata.irqs[num]; | |
95 | #else | |
9ec36caf | 96 | struct resource *r; |
aff008ad GR |
97 | if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) { |
98 | int ret; | |
99 | ||
100 | ret = of_irq_get(dev->dev.of_node, num); | |
e330b9a6 | 101 | if (ret > 0 || ret == -EPROBE_DEFER) |
aff008ad GR |
102 | return ret; |
103 | } | |
9ec36caf RH |
104 | |
105 | r = platform_get_resource(dev, IORESOURCE_IRQ, num); | |
d44fa3d4 AVF |
106 | if (has_acpi_companion(&dev->dev)) { |
107 | if (r && r->flags & IORESOURCE_DISABLED) { | |
108 | int ret; | |
109 | ||
110 | ret = acpi_irq_get(ACPI_HANDLE(&dev->dev), num, r); | |
111 | if (ret) | |
112 | return ret; | |
113 | } | |
114 | } | |
115 | ||
7085a740 LW |
116 | /* |
117 | * The resources may pass trigger flags to the irqs that need | |
118 | * to be set up. It so happens that the trigger flags for | |
119 | * IORESOURCE_BITS correspond 1-to-1 to the IRQF_TRIGGER* | |
120 | * settings. | |
121 | */ | |
60ca5e0d GR |
122 | if (r && r->flags & IORESOURCE_BITS) { |
123 | struct irq_data *irqd; | |
124 | ||
125 | irqd = irq_get_irq_data(r->start); | |
126 | if (!irqd) | |
127 | return -ENXIO; | |
128 | irqd_set_trigger_type(irqd, r->flags & IORESOURCE_BITS); | |
129 | } | |
1da177e4 | 130 | |
305b3228 | 131 | return r ? r->start : -ENXIO; |
5cf8f7db | 132 | #endif |
1da177e4 | 133 | } |
a96b2042 | 134 | EXPORT_SYMBOL_GPL(platform_get_irq); |
1da177e4 | 135 | |
4b83555d SB |
136 | /** |
137 | * platform_irq_count - Count the number of IRQs a platform device uses | |
138 | * @dev: platform device | |
139 | * | |
140 | * Return: Number of IRQs a platform device uses or EPROBE_DEFER | |
141 | */ | |
142 | int platform_irq_count(struct platform_device *dev) | |
143 | { | |
144 | int ret, nr = 0; | |
145 | ||
146 | while ((ret = platform_get_irq(dev, nr)) >= 0) | |
147 | nr++; | |
148 | ||
149 | if (ret == -EPROBE_DEFER) | |
150 | return ret; | |
151 | ||
152 | return nr; | |
153 | } | |
154 | EXPORT_SYMBOL_GPL(platform_irq_count); | |
155 | ||
1da177e4 | 156 | /** |
4a3ad20c GKH |
157 | * platform_get_resource_byname - get a resource for a device by name |
158 | * @dev: platform device | |
159 | * @type: resource type | |
160 | * @name: resource name | |
1da177e4 | 161 | */ |
4a3ad20c | 162 | struct resource *platform_get_resource_byname(struct platform_device *dev, |
c0afe7ba LW |
163 | unsigned int type, |
164 | const char *name) | |
1da177e4 LT |
165 | { |
166 | int i; | |
167 | ||
168 | for (i = 0; i < dev->num_resources; i++) { | |
169 | struct resource *r = &dev->resource[i]; | |
170 | ||
1b8cb929 PU |
171 | if (unlikely(!r->name)) |
172 | continue; | |
173 | ||
c9f66169 MD |
174 | if (type == resource_type(r) && !strcmp(r->name, name)) |
175 | return r; | |
1da177e4 LT |
176 | } |
177 | return NULL; | |
178 | } | |
a96b2042 | 179 | EXPORT_SYMBOL_GPL(platform_get_resource_byname); |
1da177e4 LT |
180 | |
181 | /** | |
d6ff8551 | 182 | * platform_get_irq_byname - get an IRQ for a device by name |
4a3ad20c GKH |
183 | * @dev: platform device |
184 | * @name: IRQ name | |
1da177e4 | 185 | */ |
c0afe7ba | 186 | int platform_get_irq_byname(struct platform_device *dev, const char *name) |
1da177e4 | 187 | { |
ad69674e GS |
188 | struct resource *r; |
189 | ||
aff008ad GR |
190 | if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) { |
191 | int ret; | |
192 | ||
193 | ret = of_irq_get_byname(dev->dev.of_node, name); | |
e330b9a6 | 194 | if (ret > 0 || ret == -EPROBE_DEFER) |
aff008ad GR |
195 | return ret; |
196 | } | |
1da177e4 | 197 | |
ad69674e | 198 | r = platform_get_resource_byname(dev, IORESOURCE_IRQ, name); |
305b3228 | 199 | return r ? r->start : -ENXIO; |
1da177e4 | 200 | } |
a96b2042 | 201 | EXPORT_SYMBOL_GPL(platform_get_irq_byname); |
1da177e4 LT |
202 | |
203 | /** | |
4a3ad20c GKH |
204 | * platform_add_devices - add a numbers of platform devices |
205 | * @devs: array of platform devices to add | |
206 | * @num: number of platform devices in array | |
1da177e4 LT |
207 | */ |
208 | int platform_add_devices(struct platform_device **devs, int num) | |
209 | { | |
210 | int i, ret = 0; | |
211 | ||
212 | for (i = 0; i < num; i++) { | |
213 | ret = platform_device_register(devs[i]); | |
214 | if (ret) { | |
215 | while (--i >= 0) | |
216 | platform_device_unregister(devs[i]); | |
217 | break; | |
218 | } | |
219 | } | |
220 | ||
221 | return ret; | |
222 | } | |
a96b2042 | 223 | EXPORT_SYMBOL_GPL(platform_add_devices); |
1da177e4 | 224 | |
37c12e74 RK |
225 | struct platform_object { |
226 | struct platform_device pdev; | |
1cec24c5 | 227 | char name[]; |
37c12e74 RK |
228 | }; |
229 | ||
1da177e4 | 230 | /** |
3c31f07a | 231 | * platform_device_put - destroy a platform device |
4a3ad20c | 232 | * @pdev: platform device to free |
37c12e74 | 233 | * |
4a3ad20c GKH |
234 | * Free all memory associated with a platform device. This function must |
235 | * _only_ be externally called in error cases. All other usage is a bug. | |
37c12e74 RK |
236 | */ |
237 | void platform_device_put(struct platform_device *pdev) | |
238 | { | |
239 | if (pdev) | |
240 | put_device(&pdev->dev); | |
241 | } | |
242 | EXPORT_SYMBOL_GPL(platform_device_put); | |
243 | ||
244 | static void platform_device_release(struct device *dev) | |
245 | { | |
4a3ad20c GKH |
246 | struct platform_object *pa = container_of(dev, struct platform_object, |
247 | pdev.dev); | |
37c12e74 | 248 | |
7096d042 | 249 | of_device_node_put(&pa->pdev.dev); |
37c12e74 | 250 | kfree(pa->pdev.dev.platform_data); |
e710d7d5 | 251 | kfree(pa->pdev.mfd_cell); |
37c12e74 | 252 | kfree(pa->pdev.resource); |
3d713e0e | 253 | kfree(pa->pdev.driver_override); |
37c12e74 RK |
254 | kfree(pa); |
255 | } | |
256 | ||
257 | /** | |
3c31f07a | 258 | * platform_device_alloc - create a platform device |
4a3ad20c GKH |
259 | * @name: base name of the device we're adding |
260 | * @id: instance id | |
37c12e74 | 261 | * |
4a3ad20c GKH |
262 | * Create a platform device object which can have other objects attached |
263 | * to it, and which will have attached objects freed when it is released. | |
37c12e74 | 264 | */ |
1359555e | 265 | struct platform_device *platform_device_alloc(const char *name, int id) |
37c12e74 RK |
266 | { |
267 | struct platform_object *pa; | |
268 | ||
1cec24c5 | 269 | pa = kzalloc(sizeof(*pa) + strlen(name) + 1, GFP_KERNEL); |
37c12e74 RK |
270 | if (pa) { |
271 | strcpy(pa->name, name); | |
272 | pa->pdev.name = pa->name; | |
273 | pa->pdev.id = id; | |
274 | device_initialize(&pa->pdev.dev); | |
275 | pa->pdev.dev.release = platform_device_release; | |
a77ce816 | 276 | arch_setup_pdev_archdata(&pa->pdev); |
37c12e74 RK |
277 | } |
278 | ||
93ce3061 | 279 | return pa ? &pa->pdev : NULL; |
37c12e74 RK |
280 | } |
281 | EXPORT_SYMBOL_GPL(platform_device_alloc); | |
282 | ||
283 | /** | |
3c31f07a | 284 | * platform_device_add_resources - add resources to a platform device |
4a3ad20c GKH |
285 | * @pdev: platform device allocated by platform_device_alloc to add resources to |
286 | * @res: set of resources that needs to be allocated for the device | |
287 | * @num: number of resources | |
37c12e74 | 288 | * |
4a3ad20c GKH |
289 | * Add a copy of the resources to the platform device. The memory |
290 | * associated with the resources will be freed when the platform device is | |
291 | * released. | |
37c12e74 | 292 | */ |
4a3ad20c | 293 | int platform_device_add_resources(struct platform_device *pdev, |
0b7f1a7e | 294 | const struct resource *res, unsigned int num) |
37c12e74 | 295 | { |
cea89623 | 296 | struct resource *r = NULL; |
37c12e74 | 297 | |
cea89623 UKK |
298 | if (res) { |
299 | r = kmemdup(res, sizeof(struct resource) * num, GFP_KERNEL); | |
300 | if (!r) | |
301 | return -ENOMEM; | |
37c12e74 | 302 | } |
cea89623 | 303 | |
4a03d6f7 | 304 | kfree(pdev->resource); |
cea89623 UKK |
305 | pdev->resource = r; |
306 | pdev->num_resources = num; | |
307 | return 0; | |
37c12e74 RK |
308 | } |
309 | EXPORT_SYMBOL_GPL(platform_device_add_resources); | |
310 | ||
311 | /** | |
3c31f07a | 312 | * platform_device_add_data - add platform-specific data to a platform device |
4a3ad20c GKH |
313 | * @pdev: platform device allocated by platform_device_alloc to add resources to |
314 | * @data: platform specific data for this platform device | |
315 | * @size: size of platform specific data | |
37c12e74 | 316 | * |
4a3ad20c GKH |
317 | * Add a copy of platform specific data to the platform device's |
318 | * platform_data pointer. The memory associated with the platform data | |
319 | * will be freed when the platform device is released. | |
37c12e74 | 320 | */ |
4a3ad20c GKH |
321 | int platform_device_add_data(struct platform_device *pdev, const void *data, |
322 | size_t size) | |
37c12e74 | 323 | { |
27a33f9e | 324 | void *d = NULL; |
5cfc64ce | 325 | |
27a33f9e UKK |
326 | if (data) { |
327 | d = kmemdup(data, size, GFP_KERNEL); | |
328 | if (!d) | |
329 | return -ENOMEM; | |
37c12e74 | 330 | } |
27a33f9e | 331 | |
251e031d | 332 | kfree(pdev->dev.platform_data); |
27a33f9e UKK |
333 | pdev->dev.platform_data = d; |
334 | return 0; | |
37c12e74 RK |
335 | } |
336 | EXPORT_SYMBOL_GPL(platform_device_add_data); | |
337 | ||
00bbc1d8 MW |
338 | /** |
339 | * platform_device_add_properties - add built-in properties to a platform device | |
340 | * @pdev: platform device to add properties to | |
f4d05266 | 341 | * @properties: null terminated array of properties to add |
00bbc1d8 | 342 | * |
f4d05266 HK |
343 | * The function will take deep copy of @properties and attach the copy to the |
344 | * platform device. The memory associated with properties will be freed when the | |
345 | * platform device is released. | |
00bbc1d8 MW |
346 | */ |
347 | int platform_device_add_properties(struct platform_device *pdev, | |
277036f0 | 348 | const struct property_entry *properties) |
00bbc1d8 | 349 | { |
f4d05266 | 350 | return device_add_properties(&pdev->dev, properties); |
00bbc1d8 MW |
351 | } |
352 | EXPORT_SYMBOL_GPL(platform_device_add_properties); | |
353 | ||
37c12e74 | 354 | /** |
4a3ad20c GKH |
355 | * platform_device_add - add a platform device to device hierarchy |
356 | * @pdev: platform device we're adding | |
1da177e4 | 357 | * |
4a3ad20c GKH |
358 | * This is part 2 of platform_device_register(), though may be called |
359 | * separately _iff_ pdev was allocated by platform_device_alloc(). | |
1da177e4 | 360 | */ |
37c12e74 | 361 | int platform_device_add(struct platform_device *pdev) |
1da177e4 | 362 | { |
689ae231 | 363 | int i, ret; |
1da177e4 LT |
364 | |
365 | if (!pdev) | |
366 | return -EINVAL; | |
367 | ||
368 | if (!pdev->dev.parent) | |
369 | pdev->dev.parent = &platform_bus; | |
370 | ||
371 | pdev->dev.bus = &platform_bus_type; | |
372 | ||
689ae231 JD |
373 | switch (pdev->id) { |
374 | default: | |
1e0b2cf9 | 375 | dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); |
689ae231 JD |
376 | break; |
377 | case PLATFORM_DEVID_NONE: | |
acc0e90f | 378 | dev_set_name(&pdev->dev, "%s", pdev->name); |
689ae231 JD |
379 | break; |
380 | case PLATFORM_DEVID_AUTO: | |
381 | /* | |
382 | * Automatically allocated device ID. We mark it as such so | |
383 | * that we remember it must be freed, and we append a suffix | |
384 | * to avoid namespace collision with explicit IDs. | |
385 | */ | |
386 | ret = ida_simple_get(&platform_devid_ida, 0, 0, GFP_KERNEL); | |
387 | if (ret < 0) | |
5da7f709 | 388 | goto err_out; |
689ae231 JD |
389 | pdev->id = ret; |
390 | pdev->id_auto = true; | |
391 | dev_set_name(&pdev->dev, "%s.%d.auto", pdev->name, pdev->id); | |
392 | break; | |
393 | } | |
1da177e4 LT |
394 | |
395 | for (i = 0; i < pdev->num_resources; i++) { | |
5da7f709 | 396 | struct resource *p, *r = &pdev->resource[i]; |
1da177e4 LT |
397 | |
398 | if (r->name == NULL) | |
1e0b2cf9 | 399 | r->name = dev_name(&pdev->dev); |
1da177e4 LT |
400 | |
401 | p = r->parent; | |
402 | if (!p) { | |
0e6c861f | 403 | if (resource_type(r) == IORESOURCE_MEM) |
1da177e4 | 404 | p = &iomem_resource; |
0e6c861f | 405 | else if (resource_type(r) == IORESOURCE_IO) |
1da177e4 LT |
406 | p = &ioport_resource; |
407 | } | |
408 | ||
0e6c861f | 409 | if (p && insert_resource(p, r)) { |
8a18f428 | 410 | dev_err(&pdev->dev, "failed to claim resource %d: %pR\n", i, r); |
5da7f709 GKH |
411 | ret = -EBUSY; |
412 | goto failed; | |
413 | } | |
1da177e4 LT |
414 | } |
415 | ||
416 | pr_debug("Registering platform device '%s'. Parent at %s\n", | |
1e0b2cf9 | 417 | dev_name(&pdev->dev), dev_name(pdev->dev.parent)); |
1da177e4 | 418 | |
e3915532 | 419 | ret = device_add(&pdev->dev); |
8b2dceba GKH |
420 | if (ret == 0) |
421 | return ret; | |
422 | ||
5da7f709 | 423 | failed: |
8b2dceba GKH |
424 | if (pdev->id_auto) { |
425 | ida_simple_remove(&platform_devid_ida, pdev->id); | |
426 | pdev->id = PLATFORM_DEVID_AUTO; | |
427 | } | |
428 | ||
429 | while (--i >= 0) { | |
430 | struct resource *r = &pdev->resource[i]; | |
7f5dcaf1 | 431 | if (r->parent) |
8b2dceba GKH |
432 | release_resource(r); |
433 | } | |
c9f66169 | 434 | |
5da7f709 | 435 | err_out: |
1da177e4 LT |
436 | return ret; |
437 | } | |
37c12e74 RK |
438 | EXPORT_SYMBOL_GPL(platform_device_add); |
439 | ||
440 | /** | |
4a3ad20c GKH |
441 | * platform_device_del - remove a platform-level device |
442 | * @pdev: platform device we're removing | |
1da177e4 | 443 | * |
4a3ad20c GKH |
444 | * Note that this function will also release all memory- and port-based |
445 | * resources owned by the device (@dev->resource). This function must | |
446 | * _only_ be externally called in error cases. All other usage is a bug. | |
1da177e4 | 447 | */ |
93ce3061 | 448 | void platform_device_del(struct platform_device *pdev) |
1da177e4 | 449 | { |
8b2dceba | 450 | int i; |
c9f66169 | 451 | |
8b2dceba | 452 | if (pdev) { |
c90aab9c | 453 | device_remove_properties(&pdev->dev); |
8b2dceba GKH |
454 | device_del(&pdev->dev); |
455 | ||
456 | if (pdev->id_auto) { | |
457 | ida_simple_remove(&platform_devid_ida, pdev->id); | |
458 | pdev->id = PLATFORM_DEVID_AUTO; | |
459 | } | |
460 | ||
461 | for (i = 0; i < pdev->num_resources; i++) { | |
462 | struct resource *r = &pdev->resource[i]; | |
7f5dcaf1 | 463 | if (r->parent) |
8b2dceba GKH |
464 | release_resource(r); |
465 | } | |
466 | } | |
1da177e4 | 467 | } |
93ce3061 DT |
468 | EXPORT_SYMBOL_GPL(platform_device_del); |
469 | ||
470 | /** | |
4a3ad20c GKH |
471 | * platform_device_register - add a platform-level device |
472 | * @pdev: platform device we're adding | |
93ce3061 | 473 | */ |
4a3ad20c | 474 | int platform_device_register(struct platform_device *pdev) |
93ce3061 DT |
475 | { |
476 | device_initialize(&pdev->dev); | |
a77ce816 | 477 | arch_setup_pdev_archdata(pdev); |
93ce3061 DT |
478 | return platform_device_add(pdev); |
479 | } | |
a96b2042 | 480 | EXPORT_SYMBOL_GPL(platform_device_register); |
93ce3061 DT |
481 | |
482 | /** | |
4a3ad20c GKH |
483 | * platform_device_unregister - unregister a platform-level device |
484 | * @pdev: platform device we're unregistering | |
93ce3061 | 485 | * |
4a3ad20c GKH |
486 | * Unregistration is done in 2 steps. First we release all resources |
487 | * and remove it from the subsystem, then we drop reference count by | |
488 | * calling platform_device_put(). | |
93ce3061 | 489 | */ |
4a3ad20c | 490 | void platform_device_unregister(struct platform_device *pdev) |
93ce3061 DT |
491 | { |
492 | platform_device_del(pdev); | |
493 | platform_device_put(pdev); | |
494 | } | |
a96b2042 | 495 | EXPORT_SYMBOL_GPL(platform_device_unregister); |
1da177e4 | 496 | |
1da177e4 | 497 | /** |
01dcc60a | 498 | * platform_device_register_full - add a platform-level device with |
44f28bde | 499 | * resources and platform-specific data |
49a4ec18 | 500 | * |
01dcc60a | 501 | * @pdevinfo: data used to create device |
d8bf2540 | 502 | * |
f0eae0ed | 503 | * Returns &struct platform_device pointer on success, or ERR_PTR() on error. |
d8bf2540 | 504 | */ |
01dcc60a | 505 | struct platform_device *platform_device_register_full( |
5a3072be | 506 | const struct platform_device_info *pdevinfo) |
d8bf2540 | 507 | { |
44f28bde | 508 | int ret = -ENOMEM; |
d8bf2540 | 509 | struct platform_device *pdev; |
d8bf2540 | 510 | |
01dcc60a | 511 | pdev = platform_device_alloc(pdevinfo->name, pdevinfo->id); |
44f28bde | 512 | if (!pdev) |
01dcc60a UKK |
513 | goto err_alloc; |
514 | ||
515 | pdev->dev.parent = pdevinfo->parent; | |
ce793486 | 516 | pdev->dev.fwnode = pdevinfo->fwnode; |
01dcc60a UKK |
517 | |
518 | if (pdevinfo->dma_mask) { | |
519 | /* | |
520 | * This memory isn't freed when the device is put, | |
521 | * I don't have a nice idea for that though. Conceptually | |
522 | * dma_mask in struct device should not be a pointer. | |
523 | * See http://thread.gmane.org/gmane.linux.kernel.pci/9081 | |
524 | */ | |
525 | pdev->dev.dma_mask = | |
526 | kmalloc(sizeof(*pdev->dev.dma_mask), GFP_KERNEL); | |
527 | if (!pdev->dev.dma_mask) | |
528 | goto err; | |
529 | ||
f65ae29b QC |
530 | kmemleak_ignore(pdev->dev.dma_mask); |
531 | ||
01dcc60a UKK |
532 | *pdev->dev.dma_mask = pdevinfo->dma_mask; |
533 | pdev->dev.coherent_dma_mask = pdevinfo->dma_mask; | |
534 | } | |
d8bf2540 | 535 | |
01dcc60a UKK |
536 | ret = platform_device_add_resources(pdev, |
537 | pdevinfo->res, pdevinfo->num_res); | |
807508c8 AV |
538 | if (ret) |
539 | goto err; | |
44f28bde | 540 | |
01dcc60a UKK |
541 | ret = platform_device_add_data(pdev, |
542 | pdevinfo->data, pdevinfo->size_data); | |
807508c8 AV |
543 | if (ret) |
544 | goto err; | |
d8bf2540 | 545 | |
f4d05266 HK |
546 | if (pdevinfo->properties) { |
547 | ret = platform_device_add_properties(pdev, | |
548 | pdevinfo->properties); | |
00bbc1d8 MW |
549 | if (ret) |
550 | goto err; | |
551 | } | |
552 | ||
44f28bde UKK |
553 | ret = platform_device_add(pdev); |
554 | if (ret) { | |
555 | err: | |
7b199811 | 556 | ACPI_COMPANION_SET(&pdev->dev, NULL); |
01dcc60a UKK |
557 | kfree(pdev->dev.dma_mask); |
558 | ||
559 | err_alloc: | |
44f28bde UKK |
560 | platform_device_put(pdev); |
561 | return ERR_PTR(ret); | |
562 | } | |
d8bf2540 DES |
563 | |
564 | return pdev; | |
d8bf2540 | 565 | } |
01dcc60a | 566 | EXPORT_SYMBOL_GPL(platform_device_register_full); |
d8bf2540 | 567 | |
00d3dcdd RK |
568 | static int platform_drv_probe(struct device *_dev) |
569 | { | |
570 | struct platform_driver *drv = to_platform_driver(_dev->driver); | |
571 | struct platform_device *dev = to_platform_device(_dev); | |
94d76d5d | 572 | int ret; |
00d3dcdd | 573 | |
86be408b SN |
574 | ret = of_clk_set_defaults(_dev->of_node, false); |
575 | if (ret < 0) | |
576 | return ret; | |
577 | ||
cb518413 | 578 | ret = dev_pm_domain_attach(_dev, true); |
25cad69f MW |
579 | if (ret != -EPROBE_DEFER) { |
580 | if (drv->probe) { | |
581 | ret = drv->probe(dev); | |
582 | if (ret) | |
583 | dev_pm_domain_detach(_dev, true); | |
584 | } else { | |
585 | /* don't fail if just dev_pm_domain_attach failed */ | |
586 | ret = 0; | |
587 | } | |
cb518413 | 588 | } |
94d76d5d | 589 | |
3f9120b0 JH |
590 | if (drv->prevent_deferred_probe && ret == -EPROBE_DEFER) { |
591 | dev_warn(_dev, "probe deferral not supported\n"); | |
592 | ret = -ENXIO; | |
593 | } | |
594 | ||
94d76d5d | 595 | return ret; |
00d3dcdd RK |
596 | } |
597 | ||
c67334fb DB |
598 | static int platform_drv_probe_fail(struct device *_dev) |
599 | { | |
600 | return -ENXIO; | |
601 | } | |
602 | ||
00d3dcdd RK |
603 | static int platform_drv_remove(struct device *_dev) |
604 | { | |
605 | struct platform_driver *drv = to_platform_driver(_dev->driver); | |
606 | struct platform_device *dev = to_platform_device(_dev); | |
b8b2c7d8 | 607 | int ret = 0; |
00d3dcdd | 608 | |
b8b2c7d8 UKK |
609 | if (drv->remove) |
610 | ret = drv->remove(dev); | |
cb518413 | 611 | dev_pm_domain_detach(_dev, true); |
94d76d5d RW |
612 | |
613 | return ret; | |
00d3dcdd RK |
614 | } |
615 | ||
616 | static void platform_drv_shutdown(struct device *_dev) | |
617 | { | |
618 | struct platform_driver *drv = to_platform_driver(_dev->driver); | |
619 | struct platform_device *dev = to_platform_device(_dev); | |
620 | ||
b8b2c7d8 UKK |
621 | if (drv->shutdown) |
622 | drv->shutdown(dev); | |
00d3dcdd RK |
623 | } |
624 | ||
00d3dcdd | 625 | /** |
9447057e | 626 | * __platform_driver_register - register a driver for platform-level devices |
4a3ad20c | 627 | * @drv: platform driver structure |
08801f96 | 628 | * @owner: owning module/driver |
00d3dcdd | 629 | */ |
9447057e LC |
630 | int __platform_driver_register(struct platform_driver *drv, |
631 | struct module *owner) | |
00d3dcdd | 632 | { |
9447057e | 633 | drv->driver.owner = owner; |
00d3dcdd | 634 | drv->driver.bus = &platform_bus_type; |
b8b2c7d8 UKK |
635 | drv->driver.probe = platform_drv_probe; |
636 | drv->driver.remove = platform_drv_remove; | |
637 | drv->driver.shutdown = platform_drv_shutdown; | |
783ea7d4 | 638 | |
00d3dcdd RK |
639 | return driver_register(&drv->driver); |
640 | } | |
9447057e | 641 | EXPORT_SYMBOL_GPL(__platform_driver_register); |
00d3dcdd RK |
642 | |
643 | /** | |
3c31f07a | 644 | * platform_driver_unregister - unregister a driver for platform-level devices |
4a3ad20c | 645 | * @drv: platform driver structure |
00d3dcdd RK |
646 | */ |
647 | void platform_driver_unregister(struct platform_driver *drv) | |
648 | { | |
649 | driver_unregister(&drv->driver); | |
650 | } | |
651 | EXPORT_SYMBOL_GPL(platform_driver_unregister); | |
652 | ||
c67334fb | 653 | /** |
c3b50dc2 | 654 | * __platform_driver_probe - register driver for non-hotpluggable device |
c67334fb | 655 | * @drv: platform driver structure |
3f9120b0 | 656 | * @probe: the driver probe routine, probably from an __init section |
c3b50dc2 | 657 | * @module: module which will be the owner of the driver |
c67334fb DB |
658 | * |
659 | * Use this instead of platform_driver_register() when you know the device | |
660 | * is not hotpluggable and has already been registered, and you want to | |
661 | * remove its run-once probe() infrastructure from memory after the driver | |
662 | * has bound to the device. | |
663 | * | |
664 | * One typical use for this would be with drivers for controllers integrated | |
665 | * into system-on-chip processors, where the controller devices have been | |
666 | * configured as part of board setup. | |
667 | * | |
3f9120b0 | 668 | * Note that this is incompatible with deferred probing. |
647c86d0 | 669 | * |
c67334fb DB |
670 | * Returns zero if the driver registered and bound to a device, else returns |
671 | * a negative error code and with the driver not registered. | |
672 | */ | |
c3b50dc2 WS |
673 | int __init_or_module __platform_driver_probe(struct platform_driver *drv, |
674 | int (*probe)(struct platform_device *), struct module *module) | |
c67334fb DB |
675 | { |
676 | int retval, code; | |
677 | ||
5c36eb2a DT |
678 | if (drv->driver.probe_type == PROBE_PREFER_ASYNCHRONOUS) { |
679 | pr_err("%s: drivers registered with %s can not be probed asynchronously\n", | |
680 | drv->driver.name, __func__); | |
681 | return -EINVAL; | |
682 | } | |
683 | ||
684 | /* | |
685 | * We have to run our probes synchronously because we check if | |
686 | * we find any devices to bind to and exit with error if there | |
687 | * are any. | |
688 | */ | |
689 | drv->driver.probe_type = PROBE_FORCE_SYNCHRONOUS; | |
690 | ||
3f9120b0 JH |
691 | /* |
692 | * Prevent driver from requesting probe deferral to avoid further | |
693 | * futile probe attempts. | |
694 | */ | |
695 | drv->prevent_deferred_probe = true; | |
696 | ||
1a6f2a75 DT |
697 | /* make sure driver won't have bind/unbind attributes */ |
698 | drv->driver.suppress_bind_attrs = true; | |
699 | ||
c67334fb DB |
700 | /* temporary section violation during probe() */ |
701 | drv->probe = probe; | |
c3b50dc2 | 702 | retval = code = __platform_driver_register(drv, module); |
c67334fb | 703 | |
1a6f2a75 DT |
704 | /* |
705 | * Fixup that section violation, being paranoid about code scanning | |
c67334fb DB |
706 | * the list of drivers in order to probe new devices. Check to see |
707 | * if the probe was successful, and make sure any forced probes of | |
708 | * new devices fail. | |
709 | */ | |
d79d3244 | 710 | spin_lock(&drv->driver.bus->p->klist_drivers.k_lock); |
c67334fb | 711 | drv->probe = NULL; |
e5dd1278 | 712 | if (code == 0 && list_empty(&drv->driver.p->klist_devices.k_list)) |
c67334fb DB |
713 | retval = -ENODEV; |
714 | drv->driver.probe = platform_drv_probe_fail; | |
d79d3244 | 715 | spin_unlock(&drv->driver.bus->p->klist_drivers.k_lock); |
c67334fb DB |
716 | |
717 | if (code != retval) | |
718 | platform_driver_unregister(drv); | |
719 | return retval; | |
720 | } | |
c3b50dc2 | 721 | EXPORT_SYMBOL_GPL(__platform_driver_probe); |
1da177e4 | 722 | |
ecdf6ceb | 723 | /** |
291f653a | 724 | * __platform_create_bundle - register driver and create corresponding device |
ecdf6ceb DT |
725 | * @driver: platform driver structure |
726 | * @probe: the driver probe routine, probably from an __init section | |
727 | * @res: set of resources that needs to be allocated for the device | |
728 | * @n_res: number of resources | |
729 | * @data: platform specific data for this platform device | |
730 | * @size: size of platform specific data | |
291f653a | 731 | * @module: module which will be the owner of the driver |
ecdf6ceb DT |
732 | * |
733 | * Use this in legacy-style modules that probe hardware directly and | |
734 | * register a single platform device and corresponding platform driver. | |
f0eae0ed JN |
735 | * |
736 | * Returns &struct platform_device pointer on success, or ERR_PTR() on error. | |
ecdf6ceb | 737 | */ |
291f653a | 738 | struct platform_device * __init_or_module __platform_create_bundle( |
ecdf6ceb DT |
739 | struct platform_driver *driver, |
740 | int (*probe)(struct platform_device *), | |
741 | struct resource *res, unsigned int n_res, | |
291f653a | 742 | const void *data, size_t size, struct module *module) |
ecdf6ceb DT |
743 | { |
744 | struct platform_device *pdev; | |
745 | int error; | |
746 | ||
747 | pdev = platform_device_alloc(driver->driver.name, -1); | |
748 | if (!pdev) { | |
749 | error = -ENOMEM; | |
750 | goto err_out; | |
751 | } | |
752 | ||
807508c8 AV |
753 | error = platform_device_add_resources(pdev, res, n_res); |
754 | if (error) | |
755 | goto err_pdev_put; | |
ecdf6ceb | 756 | |
807508c8 AV |
757 | error = platform_device_add_data(pdev, data, size); |
758 | if (error) | |
759 | goto err_pdev_put; | |
ecdf6ceb DT |
760 | |
761 | error = platform_device_add(pdev); | |
762 | if (error) | |
763 | goto err_pdev_put; | |
764 | ||
291f653a | 765 | error = __platform_driver_probe(driver, probe, module); |
ecdf6ceb DT |
766 | if (error) |
767 | goto err_pdev_del; | |
768 | ||
769 | return pdev; | |
770 | ||
771 | err_pdev_del: | |
772 | platform_device_del(pdev); | |
773 | err_pdev_put: | |
774 | platform_device_put(pdev); | |
775 | err_out: | |
776 | return ERR_PTR(error); | |
777 | } | |
291f653a | 778 | EXPORT_SYMBOL_GPL(__platform_create_bundle); |
ecdf6ceb | 779 | |
dbe2256d TR |
780 | /** |
781 | * __platform_register_drivers - register an array of platform drivers | |
782 | * @drivers: an array of drivers to register | |
783 | * @count: the number of drivers to register | |
784 | * @owner: module owning the drivers | |
785 | * | |
786 | * Registers platform drivers specified by an array. On failure to register a | |
787 | * driver, all previously registered drivers will be unregistered. Callers of | |
788 | * this API should use platform_unregister_drivers() to unregister drivers in | |
789 | * the reverse order. | |
790 | * | |
791 | * Returns: 0 on success or a negative error code on failure. | |
792 | */ | |
793 | int __platform_register_drivers(struct platform_driver * const *drivers, | |
794 | unsigned int count, struct module *owner) | |
795 | { | |
796 | unsigned int i; | |
797 | int err; | |
798 | ||
799 | for (i = 0; i < count; i++) { | |
800 | pr_debug("registering platform driver %ps\n", drivers[i]); | |
801 | ||
802 | err = __platform_driver_register(drivers[i], owner); | |
803 | if (err < 0) { | |
804 | pr_err("failed to register platform driver %ps: %d\n", | |
805 | drivers[i], err); | |
806 | goto error; | |
807 | } | |
808 | } | |
809 | ||
810 | return 0; | |
811 | ||
812 | error: | |
813 | while (i--) { | |
814 | pr_debug("unregistering platform driver %ps\n", drivers[i]); | |
815 | platform_driver_unregister(drivers[i]); | |
816 | } | |
817 | ||
818 | return err; | |
819 | } | |
820 | EXPORT_SYMBOL_GPL(__platform_register_drivers); | |
821 | ||
822 | /** | |
823 | * platform_unregister_drivers - unregister an array of platform drivers | |
824 | * @drivers: an array of drivers to unregister | |
825 | * @count: the number of drivers to unregister | |
826 | * | |
827 | * Unegisters platform drivers specified by an array. This is typically used | |
828 | * to complement an earlier call to platform_register_drivers(). Drivers are | |
829 | * unregistered in the reverse order in which they were registered. | |
830 | */ | |
831 | void platform_unregister_drivers(struct platform_driver * const *drivers, | |
832 | unsigned int count) | |
833 | { | |
834 | while (count--) { | |
835 | pr_debug("unregistering platform driver %ps\n", drivers[count]); | |
836 | platform_driver_unregister(drivers[count]); | |
837 | } | |
838 | } | |
839 | EXPORT_SYMBOL_GPL(platform_unregister_drivers); | |
840 | ||
a0245f7a DB |
841 | /* modalias support enables more hands-off userspace setup: |
842 | * (a) environment variable lets new-style hotplug events work once system is | |
843 | * fully running: "modprobe $MODALIAS" | |
844 | * (b) sysfs attribute lets new-style coldplug recover from hotplug events | |
845 | * mishandled before system is fully running: "modprobe $(cat modalias)" | |
846 | */ | |
4a3ad20c GKH |
847 | static ssize_t modalias_show(struct device *dev, struct device_attribute *a, |
848 | char *buf) | |
a0245f7a DB |
849 | { |
850 | struct platform_device *pdev = to_platform_device(dev); | |
8c4ff6d0 ZR |
851 | int len; |
852 | ||
0634c295 | 853 | len = of_device_modalias(dev, buf, PAGE_SIZE); |
b9f73067 ZR |
854 | if (len != -ENODEV) |
855 | return len; | |
856 | ||
8c4ff6d0 ZR |
857 | len = acpi_device_modalias(dev, buf, PAGE_SIZE -1); |
858 | if (len != -ENODEV) | |
859 | return len; | |
860 | ||
861 | len = snprintf(buf, PAGE_SIZE, "platform:%s\n", pdev->name); | |
a0245f7a DB |
862 | |
863 | return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len; | |
864 | } | |
d06262e5 | 865 | static DEVICE_ATTR_RO(modalias); |
a0245f7a | 866 | |
3d713e0e KP |
867 | static ssize_t driver_override_store(struct device *dev, |
868 | struct device_attribute *attr, | |
869 | const char *buf, size_t count) | |
870 | { | |
871 | struct platform_device *pdev = to_platform_device(dev); | |
62655397 | 872 | char *driver_override, *old, *cp; |
3d713e0e | 873 | |
bf563b01 NS |
874 | /* We need to keep extra room for a newline */ |
875 | if (count >= (PAGE_SIZE - 1)) | |
3d713e0e KP |
876 | return -EINVAL; |
877 | ||
878 | driver_override = kstrndup(buf, count, GFP_KERNEL); | |
879 | if (!driver_override) | |
880 | return -ENOMEM; | |
881 | ||
882 | cp = strchr(driver_override, '\n'); | |
883 | if (cp) | |
884 | *cp = '\0'; | |
885 | ||
62655397 AS |
886 | device_lock(dev); |
887 | old = pdev->driver_override; | |
3d713e0e KP |
888 | if (strlen(driver_override)) { |
889 | pdev->driver_override = driver_override; | |
890 | } else { | |
891 | kfree(driver_override); | |
892 | pdev->driver_override = NULL; | |
893 | } | |
62655397 | 894 | device_unlock(dev); |
3d713e0e KP |
895 | |
896 | kfree(old); | |
897 | ||
898 | return count; | |
899 | } | |
900 | ||
901 | static ssize_t driver_override_show(struct device *dev, | |
902 | struct device_attribute *attr, char *buf) | |
903 | { | |
904 | struct platform_device *pdev = to_platform_device(dev); | |
62655397 | 905 | ssize_t len; |
3d713e0e | 906 | |
62655397 AS |
907 | device_lock(dev); |
908 | len = sprintf(buf, "%s\n", pdev->driver_override); | |
909 | device_unlock(dev); | |
910 | return len; | |
3d713e0e KP |
911 | } |
912 | static DEVICE_ATTR_RW(driver_override); | |
913 | ||
914 | ||
d06262e5 GKH |
915 | static struct attribute *platform_dev_attrs[] = { |
916 | &dev_attr_modalias.attr, | |
3d713e0e | 917 | &dev_attr_driver_override.attr, |
d06262e5 | 918 | NULL, |
a0245f7a | 919 | }; |
d06262e5 | 920 | ATTRIBUTE_GROUPS(platform_dev); |
a0245f7a | 921 | |
7eff2e7a | 922 | static int platform_uevent(struct device *dev, struct kobj_uevent_env *env) |
a0245f7a DB |
923 | { |
924 | struct platform_device *pdev = to_platform_device(dev); | |
eca39301 GL |
925 | int rc; |
926 | ||
927 | /* Some devices have extra OF data and an OF-style MODALIAS */ | |
0258e182 | 928 | rc = of_device_uevent_modalias(dev, env); |
eca39301 GL |
929 | if (rc != -ENODEV) |
930 | return rc; | |
a0245f7a | 931 | |
8c4ff6d0 ZR |
932 | rc = acpi_device_uevent_modalias(dev, env); |
933 | if (rc != -ENODEV) | |
934 | return rc; | |
935 | ||
57fee4a5 | 936 | add_uevent_var(env, "MODALIAS=%s%s", PLATFORM_MODULE_PREFIX, |
0a26813c | 937 | pdev->name); |
a0245f7a DB |
938 | return 0; |
939 | } | |
940 | ||
57fee4a5 | 941 | static const struct platform_device_id *platform_match_id( |
831fad2f | 942 | const struct platform_device_id *id, |
57fee4a5 EM |
943 | struct platform_device *pdev) |
944 | { | |
945 | while (id->name[0]) { | |
946 | if (strcmp(pdev->name, id->name) == 0) { | |
947 | pdev->id_entry = id; | |
948 | return id; | |
949 | } | |
950 | id++; | |
951 | } | |
952 | return NULL; | |
953 | } | |
954 | ||
1da177e4 | 955 | /** |
4a3ad20c GKH |
956 | * platform_match - bind platform device to platform driver. |
957 | * @dev: device. | |
958 | * @drv: driver. | |
1da177e4 | 959 | * |
4a3ad20c GKH |
960 | * Platform device IDs are assumed to be encoded like this: |
961 | * "<name><instance>", where <name> is a short description of the type of | |
962 | * device, like "pci" or "floppy", and <instance> is the enumerated | |
963 | * instance of the device, like '0' or '42'. Driver IDs are simply | |
964 | * "<name>". So, extract the <name> from the platform_device structure, | |
965 | * and compare it against the name of the driver. Return whether they match | |
966 | * or not. | |
1da177e4 | 967 | */ |
4a3ad20c | 968 | static int platform_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 969 | { |
71b3e0c1 | 970 | struct platform_device *pdev = to_platform_device(dev); |
57fee4a5 EM |
971 | struct platform_driver *pdrv = to_platform_driver(drv); |
972 | ||
3d713e0e KP |
973 | /* When driver_override is set, only bind to the matching driver */ |
974 | if (pdev->driver_override) | |
975 | return !strcmp(pdev->driver_override, drv->name); | |
976 | ||
05212157 GL |
977 | /* Attempt an OF style match first */ |
978 | if (of_driver_match_device(dev, drv)) | |
979 | return 1; | |
980 | ||
91e56878 MW |
981 | /* Then try ACPI style match */ |
982 | if (acpi_driver_match_device(dev, drv)) | |
983 | return 1; | |
984 | ||
05212157 | 985 | /* Then try to match against the id table */ |
57fee4a5 EM |
986 | if (pdrv->id_table) |
987 | return platform_match_id(pdrv->id_table, pdev) != NULL; | |
1da177e4 | 988 | |
57fee4a5 | 989 | /* fall-back to driver name match */ |
1e0b2cf9 | 990 | return (strcmp(pdev->name, drv->name) == 0); |
1da177e4 LT |
991 | } |
992 | ||
25e18499 RW |
993 | #ifdef CONFIG_PM_SLEEP |
994 | ||
995 | static int platform_legacy_suspend(struct device *dev, pm_message_t mesg) | |
1da177e4 | 996 | { |
783ea7d4 MD |
997 | struct platform_driver *pdrv = to_platform_driver(dev->driver); |
998 | struct platform_device *pdev = to_platform_device(dev); | |
1da177e4 LT |
999 | int ret = 0; |
1000 | ||
783ea7d4 MD |
1001 | if (dev->driver && pdrv->suspend) |
1002 | ret = pdrv->suspend(pdev, mesg); | |
386415d8 DB |
1003 | |
1004 | return ret; | |
1005 | } | |
1006 | ||
25e18499 | 1007 | static int platform_legacy_resume(struct device *dev) |
1da177e4 | 1008 | { |
783ea7d4 MD |
1009 | struct platform_driver *pdrv = to_platform_driver(dev->driver); |
1010 | struct platform_device *pdev = to_platform_device(dev); | |
1da177e4 LT |
1011 | int ret = 0; |
1012 | ||
783ea7d4 MD |
1013 | if (dev->driver && pdrv->resume) |
1014 | ret = pdrv->resume(pdev); | |
9480e307 | 1015 | |
1da177e4 LT |
1016 | return ret; |
1017 | } | |
1018 | ||
69c9dd1e | 1019 | #endif /* CONFIG_PM_SLEEP */ |
9d730229 | 1020 | |
25e18499 RW |
1021 | #ifdef CONFIG_SUSPEND |
1022 | ||
69c9dd1e | 1023 | int platform_pm_suspend(struct device *dev) |
25e18499 RW |
1024 | { |
1025 | struct device_driver *drv = dev->driver; | |
1026 | int ret = 0; | |
1027 | ||
adf09493 RW |
1028 | if (!drv) |
1029 | return 0; | |
1030 | ||
1031 | if (drv->pm) { | |
25e18499 RW |
1032 | if (drv->pm->suspend) |
1033 | ret = drv->pm->suspend(dev); | |
1034 | } else { | |
1035 | ret = platform_legacy_suspend(dev, PMSG_SUSPEND); | |
1036 | } | |
1037 | ||
1038 | return ret; | |
1039 | } | |
1040 | ||
69c9dd1e | 1041 | int platform_pm_resume(struct device *dev) |
25e18499 RW |
1042 | { |
1043 | struct device_driver *drv = dev->driver; | |
1044 | int ret = 0; | |
1045 | ||
adf09493 RW |
1046 | if (!drv) |
1047 | return 0; | |
1048 | ||
1049 | if (drv->pm) { | |
25e18499 RW |
1050 | if (drv->pm->resume) |
1051 | ret = drv->pm->resume(dev); | |
1052 | } else { | |
1053 | ret = platform_legacy_resume(dev); | |
1054 | } | |
1055 | ||
1056 | return ret; | |
1057 | } | |
1058 | ||
69c9dd1e | 1059 | #endif /* CONFIG_SUSPEND */ |
25e18499 | 1060 | |
1f112cee | 1061 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
25e18499 | 1062 | |
69c9dd1e | 1063 | int platform_pm_freeze(struct device *dev) |
25e18499 RW |
1064 | { |
1065 | struct device_driver *drv = dev->driver; | |
1066 | int ret = 0; | |
1067 | ||
1068 | if (!drv) | |
1069 | return 0; | |
1070 | ||
1071 | if (drv->pm) { | |
1072 | if (drv->pm->freeze) | |
1073 | ret = drv->pm->freeze(dev); | |
1074 | } else { | |
1075 | ret = platform_legacy_suspend(dev, PMSG_FREEZE); | |
1076 | } | |
1077 | ||
1078 | return ret; | |
1079 | } | |
1080 | ||
69c9dd1e | 1081 | int platform_pm_thaw(struct device *dev) |
25e18499 RW |
1082 | { |
1083 | struct device_driver *drv = dev->driver; | |
1084 | int ret = 0; | |
1085 | ||
adf09493 RW |
1086 | if (!drv) |
1087 | return 0; | |
1088 | ||
1089 | if (drv->pm) { | |
25e18499 RW |
1090 | if (drv->pm->thaw) |
1091 | ret = drv->pm->thaw(dev); | |
1092 | } else { | |
1093 | ret = platform_legacy_resume(dev); | |
1094 | } | |
1095 | ||
1096 | return ret; | |
1097 | } | |
1098 | ||
69c9dd1e | 1099 | int platform_pm_poweroff(struct device *dev) |
25e18499 RW |
1100 | { |
1101 | struct device_driver *drv = dev->driver; | |
1102 | int ret = 0; | |
1103 | ||
adf09493 RW |
1104 | if (!drv) |
1105 | return 0; | |
1106 | ||
1107 | if (drv->pm) { | |
25e18499 RW |
1108 | if (drv->pm->poweroff) |
1109 | ret = drv->pm->poweroff(dev); | |
1110 | } else { | |
1111 | ret = platform_legacy_suspend(dev, PMSG_HIBERNATE); | |
1112 | } | |
1113 | ||
1114 | return ret; | |
1115 | } | |
1116 | ||
69c9dd1e | 1117 | int platform_pm_restore(struct device *dev) |
25e18499 RW |
1118 | { |
1119 | struct device_driver *drv = dev->driver; | |
1120 | int ret = 0; | |
1121 | ||
adf09493 RW |
1122 | if (!drv) |
1123 | return 0; | |
1124 | ||
1125 | if (drv->pm) { | |
25e18499 RW |
1126 | if (drv->pm->restore) |
1127 | ret = drv->pm->restore(dev); | |
1128 | } else { | |
1129 | ret = platform_legacy_resume(dev); | |
1130 | } | |
1131 | ||
1132 | return ret; | |
1133 | } | |
1134 | ||
69c9dd1e | 1135 | #endif /* CONFIG_HIBERNATE_CALLBACKS */ |
25e18499 | 1136 | |
d9ab7716 | 1137 | static const struct dev_pm_ops platform_dev_pm_ops = { |
8b313a38 RW |
1138 | .runtime_suspend = pm_generic_runtime_suspend, |
1139 | .runtime_resume = pm_generic_runtime_resume, | |
69c9dd1e | 1140 | USE_PLATFORM_PM_SLEEP_OPS |
25e18499 RW |
1141 | }; |
1142 | ||
1da177e4 LT |
1143 | struct bus_type platform_bus_type = { |
1144 | .name = "platform", | |
d06262e5 | 1145 | .dev_groups = platform_dev_groups, |
1da177e4 | 1146 | .match = platform_match, |
a0245f7a | 1147 | .uevent = platform_uevent, |
9d730229 | 1148 | .pm = &platform_dev_pm_ops, |
d89e2378 | 1149 | .force_dma = true, |
1da177e4 | 1150 | }; |
a96b2042 | 1151 | EXPORT_SYMBOL_GPL(platform_bus_type); |
1da177e4 LT |
1152 | |
1153 | int __init platform_bus_init(void) | |
1154 | { | |
fbfb1445 CH |
1155 | int error; |
1156 | ||
13977091 MD |
1157 | early_platform_cleanup(); |
1158 | ||
fbfb1445 CH |
1159 | error = device_register(&platform_bus); |
1160 | if (error) | |
1161 | return error; | |
1162 | error = bus_register(&platform_bus_type); | |
1163 | if (error) | |
1164 | device_unregister(&platform_bus); | |
801d728c | 1165 | of_platform_register_reconfig_notifier(); |
fbfb1445 | 1166 | return error; |
1da177e4 LT |
1167 | } |
1168 | ||
1169 | #ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK | |
1170 | u64 dma_get_required_mask(struct device *dev) | |
1171 | { | |
1172 | u32 low_totalram = ((max_pfn - 1) << PAGE_SHIFT); | |
1173 | u32 high_totalram = ((max_pfn - 1) >> (32 - PAGE_SHIFT)); | |
1174 | u64 mask; | |
1175 | ||
1176 | if (!high_totalram) { | |
1177 | /* convert to mask just covering totalram */ | |
1178 | low_totalram = (1 << (fls(low_totalram) - 1)); | |
1179 | low_totalram += low_totalram - 1; | |
1180 | mask = low_totalram; | |
1181 | } else { | |
1182 | high_totalram = (1 << (fls(high_totalram) - 1)); | |
1183 | high_totalram += high_totalram - 1; | |
1184 | mask = (((u64)high_totalram) << 32) + 0xffffffff; | |
1185 | } | |
e88a0c2c | 1186 | return mask; |
1da177e4 LT |
1187 | } |
1188 | EXPORT_SYMBOL_GPL(dma_get_required_mask); | |
1189 | #endif | |
13977091 MD |
1190 | |
1191 | static __initdata LIST_HEAD(early_platform_driver_list); | |
1192 | static __initdata LIST_HEAD(early_platform_device_list); | |
1193 | ||
1194 | /** | |
4d26e139 | 1195 | * early_platform_driver_register - register early platform driver |
d86c1302 | 1196 | * @epdrv: early_platform driver structure |
13977091 | 1197 | * @buf: string passed from early_param() |
4d26e139 MD |
1198 | * |
1199 | * Helper function for early_platform_init() / early_platform_init_buffer() | |
13977091 MD |
1200 | */ |
1201 | int __init early_platform_driver_register(struct early_platform_driver *epdrv, | |
1202 | char *buf) | |
1203 | { | |
c60e0504 | 1204 | char *tmp; |
13977091 MD |
1205 | int n; |
1206 | ||
1207 | /* Simply add the driver to the end of the global list. | |
1208 | * Drivers will by default be put on the list in compiled-in order. | |
1209 | */ | |
1210 | if (!epdrv->list.next) { | |
1211 | INIT_LIST_HEAD(&epdrv->list); | |
1212 | list_add_tail(&epdrv->list, &early_platform_driver_list); | |
1213 | } | |
1214 | ||
1215 | /* If the user has specified device then make sure the driver | |
1216 | * gets prioritized. The driver of the last device specified on | |
1217 | * command line will be put first on the list. | |
1218 | */ | |
1219 | n = strlen(epdrv->pdrv->driver.name); | |
1220 | if (buf && !strncmp(buf, epdrv->pdrv->driver.name, n)) { | |
1221 | list_move(&epdrv->list, &early_platform_driver_list); | |
1222 | ||
c60e0504 MD |
1223 | /* Allow passing parameters after device name */ |
1224 | if (buf[n] == '\0' || buf[n] == ',') | |
13977091 | 1225 | epdrv->requested_id = -1; |
c60e0504 MD |
1226 | else { |
1227 | epdrv->requested_id = simple_strtoul(&buf[n + 1], | |
1228 | &tmp, 10); | |
1229 | ||
1230 | if (buf[n] != '.' || (tmp == &buf[n + 1])) { | |
1231 | epdrv->requested_id = EARLY_PLATFORM_ID_ERROR; | |
1232 | n = 0; | |
1233 | } else | |
1234 | n += strcspn(&buf[n + 1], ",") + 1; | |
1235 | } | |
1236 | ||
1237 | if (buf[n] == ',') | |
1238 | n++; | |
1239 | ||
1240 | if (epdrv->bufsize) { | |
1241 | memcpy(epdrv->buffer, &buf[n], | |
1242 | min_t(int, epdrv->bufsize, strlen(&buf[n]) + 1)); | |
1243 | epdrv->buffer[epdrv->bufsize - 1] = '\0'; | |
1244 | } | |
13977091 MD |
1245 | } |
1246 | ||
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | /** | |
4d26e139 | 1251 | * early_platform_add_devices - adds a number of early platform devices |
13977091 MD |
1252 | * @devs: array of early platform devices to add |
1253 | * @num: number of early platform devices in array | |
4d26e139 MD |
1254 | * |
1255 | * Used by early architecture code to register early platform devices and | |
1256 | * their platform data. | |
13977091 MD |
1257 | */ |
1258 | void __init early_platform_add_devices(struct platform_device **devs, int num) | |
1259 | { | |
1260 | struct device *dev; | |
1261 | int i; | |
1262 | ||
1263 | /* simply add the devices to list */ | |
1264 | for (i = 0; i < num; i++) { | |
1265 | dev = &devs[i]->dev; | |
1266 | ||
1267 | if (!dev->devres_head.next) { | |
bed2b42d | 1268 | pm_runtime_early_init(dev); |
13977091 MD |
1269 | INIT_LIST_HEAD(&dev->devres_head); |
1270 | list_add_tail(&dev->devres_head, | |
1271 | &early_platform_device_list); | |
1272 | } | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | /** | |
4d26e139 | 1277 | * early_platform_driver_register_all - register early platform drivers |
13977091 | 1278 | * @class_str: string to identify early platform driver class |
4d26e139 MD |
1279 | * |
1280 | * Used by architecture code to register all early platform drivers | |
1281 | * for a certain class. If omitted then only early platform drivers | |
1282 | * with matching kernel command line class parameters will be registered. | |
13977091 MD |
1283 | */ |
1284 | void __init early_platform_driver_register_all(char *class_str) | |
1285 | { | |
1286 | /* The "class_str" parameter may or may not be present on the kernel | |
1287 | * command line. If it is present then there may be more than one | |
1288 | * matching parameter. | |
1289 | * | |
1290 | * Since we register our early platform drivers using early_param() | |
1291 | * we need to make sure that they also get registered in the case | |
1292 | * when the parameter is missing from the kernel command line. | |
1293 | * | |
1294 | * We use parse_early_options() to make sure the early_param() gets | |
1295 | * called at least once. The early_param() may be called more than | |
1296 | * once since the name of the preferred device may be specified on | |
1297 | * the kernel command line. early_platform_driver_register() handles | |
1298 | * this case for us. | |
1299 | */ | |
1300 | parse_early_options(class_str); | |
1301 | } | |
1302 | ||
1303 | /** | |
4d26e139 | 1304 | * early_platform_match - find early platform device matching driver |
d86c1302 | 1305 | * @epdrv: early platform driver structure |
13977091 MD |
1306 | * @id: id to match against |
1307 | */ | |
a8257910 | 1308 | static struct platform_device * __init |
13977091 MD |
1309 | early_platform_match(struct early_platform_driver *epdrv, int id) |
1310 | { | |
1311 | struct platform_device *pd; | |
1312 | ||
1313 | list_for_each_entry(pd, &early_platform_device_list, dev.devres_head) | |
1314 | if (platform_match(&pd->dev, &epdrv->pdrv->driver)) | |
1315 | if (pd->id == id) | |
1316 | return pd; | |
1317 | ||
1318 | return NULL; | |
1319 | } | |
1320 | ||
1321 | /** | |
4d26e139 | 1322 | * early_platform_left - check if early platform driver has matching devices |
d86c1302 | 1323 | * @epdrv: early platform driver structure |
13977091 MD |
1324 | * @id: return true if id or above exists |
1325 | */ | |
a8257910 | 1326 | static int __init early_platform_left(struct early_platform_driver *epdrv, |
13977091 MD |
1327 | int id) |
1328 | { | |
1329 | struct platform_device *pd; | |
1330 | ||
1331 | list_for_each_entry(pd, &early_platform_device_list, dev.devres_head) | |
1332 | if (platform_match(&pd->dev, &epdrv->pdrv->driver)) | |
1333 | if (pd->id >= id) | |
1334 | return 1; | |
1335 | ||
1336 | return 0; | |
1337 | } | |
1338 | ||
1339 | /** | |
4d26e139 | 1340 | * early_platform_driver_probe_id - probe drivers matching class_str and id |
13977091 MD |
1341 | * @class_str: string to identify early platform driver class |
1342 | * @id: id to match against | |
1343 | * @nr_probe: number of platform devices to successfully probe before exiting | |
1344 | */ | |
1345 | static int __init early_platform_driver_probe_id(char *class_str, | |
1346 | int id, | |
1347 | int nr_probe) | |
1348 | { | |
1349 | struct early_platform_driver *epdrv; | |
1350 | struct platform_device *match; | |
1351 | int match_id; | |
1352 | int n = 0; | |
1353 | int left = 0; | |
1354 | ||
1355 | list_for_each_entry(epdrv, &early_platform_driver_list, list) { | |
1356 | /* only use drivers matching our class_str */ | |
1357 | if (strcmp(class_str, epdrv->class_str)) | |
1358 | continue; | |
1359 | ||
1360 | if (id == -2) { | |
1361 | match_id = epdrv->requested_id; | |
1362 | left = 1; | |
1363 | ||
1364 | } else { | |
1365 | match_id = id; | |
1366 | left += early_platform_left(epdrv, id); | |
1367 | ||
1368 | /* skip requested id */ | |
1369 | switch (epdrv->requested_id) { | |
1370 | case EARLY_PLATFORM_ID_ERROR: | |
1371 | case EARLY_PLATFORM_ID_UNSET: | |
1372 | break; | |
1373 | default: | |
1374 | if (epdrv->requested_id == id) | |
1375 | match_id = EARLY_PLATFORM_ID_UNSET; | |
1376 | } | |
1377 | } | |
1378 | ||
1379 | switch (match_id) { | |
1380 | case EARLY_PLATFORM_ID_ERROR: | |
0258e182 FP |
1381 | pr_warn("%s: unable to parse %s parameter\n", |
1382 | class_str, epdrv->pdrv->driver.name); | |
13977091 MD |
1383 | /* fall-through */ |
1384 | case EARLY_PLATFORM_ID_UNSET: | |
1385 | match = NULL; | |
1386 | break; | |
1387 | default: | |
1388 | match = early_platform_match(epdrv, match_id); | |
1389 | } | |
1390 | ||
1391 | if (match) { | |
a636ee7f PM |
1392 | /* |
1393 | * Set up a sensible init_name to enable | |
1394 | * dev_name() and others to be used before the | |
1395 | * rest of the driver core is initialized. | |
1396 | */ | |
06fe53be | 1397 | if (!match->dev.init_name && slab_is_available()) { |
a636ee7f | 1398 | if (match->id != -1) |
bd05086b PM |
1399 | match->dev.init_name = |
1400 | kasprintf(GFP_KERNEL, "%s.%d", | |
1401 | match->name, | |
1402 | match->id); | |
a636ee7f | 1403 | else |
bd05086b PM |
1404 | match->dev.init_name = |
1405 | kasprintf(GFP_KERNEL, "%s", | |
1406 | match->name); | |
a636ee7f | 1407 | |
a636ee7f PM |
1408 | if (!match->dev.init_name) |
1409 | return -ENOMEM; | |
1410 | } | |
bd05086b | 1411 | |
13977091 | 1412 | if (epdrv->pdrv->probe(match)) |
0258e182 FP |
1413 | pr_warn("%s: unable to probe %s early.\n", |
1414 | class_str, match->name); | |
13977091 MD |
1415 | else |
1416 | n++; | |
1417 | } | |
1418 | ||
1419 | if (n >= nr_probe) | |
1420 | break; | |
1421 | } | |
1422 | ||
1423 | if (left) | |
1424 | return n; | |
1425 | else | |
1426 | return -ENODEV; | |
1427 | } | |
1428 | ||
1429 | /** | |
4d26e139 | 1430 | * early_platform_driver_probe - probe a class of registered drivers |
13977091 MD |
1431 | * @class_str: string to identify early platform driver class |
1432 | * @nr_probe: number of platform devices to successfully probe before exiting | |
1433 | * @user_only: only probe user specified early platform devices | |
4d26e139 MD |
1434 | * |
1435 | * Used by architecture code to probe registered early platform drivers | |
1436 | * within a certain class. For probe to happen a registered early platform | |
1437 | * device matching a registered early platform driver is needed. | |
13977091 MD |
1438 | */ |
1439 | int __init early_platform_driver_probe(char *class_str, | |
1440 | int nr_probe, | |
1441 | int user_only) | |
1442 | { | |
1443 | int k, n, i; | |
1444 | ||
1445 | n = 0; | |
1446 | for (i = -2; n < nr_probe; i++) { | |
1447 | k = early_platform_driver_probe_id(class_str, i, nr_probe - n); | |
1448 | ||
1449 | if (k < 0) | |
1450 | break; | |
1451 | ||
1452 | n += k; | |
1453 | ||
1454 | if (user_only) | |
1455 | break; | |
1456 | } | |
1457 | ||
1458 | return n; | |
1459 | } | |
1460 | ||
1461 | /** | |
1462 | * early_platform_cleanup - clean up early platform code | |
1463 | */ | |
1464 | void __init early_platform_cleanup(void) | |
1465 | { | |
1466 | struct platform_device *pd, *pd2; | |
1467 | ||
1468 | /* clean up the devres list used to chain devices */ | |
1469 | list_for_each_entry_safe(pd, pd2, &early_platform_device_list, | |
1470 | dev.devres_head) { | |
1471 | list_del(&pd->dev.devres_head); | |
1472 | memset(&pd->dev.devres_head, 0, sizeof(pd->dev.devres_head)); | |
1473 | } | |
1474 | } | |
1475 |