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