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