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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> |
30e1e000 | 30 | #include <linux/kmemleak.h> |
062cfcd8 | 31 | #include <linux/types.h> |
1da177e4 | 32 | |
a1bdc7aa | 33 | #include "base.h" |
bed2b42d | 34 | #include "power/power.h" |
a1bdc7aa | 35 | |
689ae231 JD |
36 | /* For automatically allocated device IDs */ |
37 | static DEFINE_IDA(platform_devid_ida); | |
38 | ||
1da177e4 | 39 | struct device platform_bus = { |
1e0b2cf9 | 40 | .init_name = "platform", |
1da177e4 | 41 | }; |
a96b2042 | 42 | EXPORT_SYMBOL_GPL(platform_bus); |
1da177e4 | 43 | |
a77ce816 KG |
44 | /** |
45 | * arch_setup_pdev_archdata - Allow manipulation of archdata before its used | |
7de636fa | 46 | * @pdev: platform device |
a77ce816 KG |
47 | * |
48 | * This is called before platform_device_add() such that any pdev_archdata may | |
49 | * be setup before the platform_notifier is called. So if a user needs to | |
50 | * manipulate any relevant information in the pdev_archdata they can do: | |
51 | * | |
b1d6d822 | 52 | * platform_device_alloc() |
0258e182 FP |
53 | * ... manipulate ... |
54 | * platform_device_add() | |
a77ce816 KG |
55 | * |
56 | * And if they don't care they can just call platform_device_register() and | |
57 | * everything will just work out. | |
58 | */ | |
59 | void __weak arch_setup_pdev_archdata(struct platform_device *pdev) | |
60 | { | |
61 | } | |
62 | ||
1da177e4 | 63 | /** |
4a3ad20c GKH |
64 | * platform_get_resource - get a resource for a device |
65 | * @dev: platform device | |
66 | * @type: resource type | |
67 | * @num: resource index | |
1da177e4 | 68 | */ |
4a3ad20c GKH |
69 | struct resource *platform_get_resource(struct platform_device *dev, |
70 | unsigned int type, unsigned int num) | |
1da177e4 | 71 | { |
062cfcd8 | 72 | u32 i; |
1da177e4 LT |
73 | |
74 | for (i = 0; i < dev->num_resources; i++) { | |
75 | struct resource *r = &dev->resource[i]; | |
76 | ||
c9f66169 MD |
77 | if (type == resource_type(r) && num-- == 0) |
78 | return r; | |
1da177e4 LT |
79 | } |
80 | return NULL; | |
81 | } | |
a96b2042 | 82 | EXPORT_SYMBOL_GPL(platform_get_resource); |
1da177e4 LT |
83 | |
84 | /** | |
4a3ad20c GKH |
85 | * platform_get_irq - get an IRQ for a device |
86 | * @dev: platform device | |
87 | * @num: IRQ number index | |
1da177e4 LT |
88 | */ |
89 | int platform_get_irq(struct platform_device *dev, unsigned int num) | |
90 | { | |
5cf8f7db AL |
91 | #ifdef CONFIG_SPARC |
92 | /* sparc does not have irqs represented as IORESOURCE_IRQ resources */ | |
93 | if (!dev || num >= dev->archdata.num_irqs) | |
94 | return -ENXIO; | |
95 | return dev->archdata.irqs[num]; | |
96 | #else | |
9ec36caf | 97 | struct resource *r; |
aff008ad GR |
98 | if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) { |
99 | int ret; | |
100 | ||
101 | ret = of_irq_get(dev->dev.of_node, num); | |
e330b9a6 | 102 | if (ret > 0 || ret == -EPROBE_DEFER) |
aff008ad GR |
103 | return ret; |
104 | } | |
9ec36caf RH |
105 | |
106 | r = platform_get_resource(dev, IORESOURCE_IRQ, num); | |
d44fa3d4 AVF |
107 | if (has_acpi_companion(&dev->dev)) { |
108 | if (r && r->flags & IORESOURCE_DISABLED) { | |
109 | int ret; | |
110 | ||
111 | ret = acpi_irq_get(ACPI_HANDLE(&dev->dev), num, r); | |
112 | if (ret) | |
113 | return ret; | |
114 | } | |
115 | } | |
116 | ||
7085a740 LW |
117 | /* |
118 | * The resources may pass trigger flags to the irqs that need | |
119 | * to be set up. It so happens that the trigger flags for | |
120 | * IORESOURCE_BITS correspond 1-to-1 to the IRQF_TRIGGER* | |
121 | * settings. | |
122 | */ | |
60ca5e0d GR |
123 | if (r && r->flags & IORESOURCE_BITS) { |
124 | struct irq_data *irqd; | |
125 | ||
126 | irqd = irq_get_irq_data(r->start); | |
127 | if (!irqd) | |
128 | return -ENXIO; | |
129 | irqd_set_trigger_type(irqd, r->flags & IORESOURCE_BITS); | |
130 | } | |
1da177e4 | 131 | |
305b3228 | 132 | return r ? r->start : -ENXIO; |
5cf8f7db | 133 | #endif |
1da177e4 | 134 | } |
a96b2042 | 135 | EXPORT_SYMBOL_GPL(platform_get_irq); |
1da177e4 | 136 | |
4b83555d SB |
137 | /** |
138 | * platform_irq_count - Count the number of IRQs a platform device uses | |
139 | * @dev: platform device | |
140 | * | |
141 | * Return: Number of IRQs a platform device uses or EPROBE_DEFER | |
142 | */ | |
143 | int platform_irq_count(struct platform_device *dev) | |
144 | { | |
145 | int ret, nr = 0; | |
146 | ||
147 | while ((ret = platform_get_irq(dev, nr)) >= 0) | |
148 | nr++; | |
149 | ||
150 | if (ret == -EPROBE_DEFER) | |
151 | return ret; | |
152 | ||
153 | return nr; | |
154 | } | |
155 | EXPORT_SYMBOL_GPL(platform_irq_count); | |
156 | ||
1da177e4 | 157 | /** |
4a3ad20c GKH |
158 | * platform_get_resource_byname - get a resource for a device by name |
159 | * @dev: platform device | |
160 | * @type: resource type | |
161 | * @name: resource name | |
1da177e4 | 162 | */ |
4a3ad20c | 163 | struct resource *platform_get_resource_byname(struct platform_device *dev, |
c0afe7ba LW |
164 | unsigned int type, |
165 | const char *name) | |
1da177e4 | 166 | { |
062cfcd8 | 167 | u32 i; |
1da177e4 LT |
168 | |
169 | for (i = 0; i < dev->num_resources; i++) { | |
170 | struct resource *r = &dev->resource[i]; | |
171 | ||
1b8cb929 PU |
172 | if (unlikely(!r->name)) |
173 | continue; | |
174 | ||
c9f66169 MD |
175 | if (type == resource_type(r) && !strcmp(r->name, name)) |
176 | return r; | |
1da177e4 LT |
177 | } |
178 | return NULL; | |
179 | } | |
a96b2042 | 180 | EXPORT_SYMBOL_GPL(platform_get_resource_byname); |
1da177e4 LT |
181 | |
182 | /** | |
d6ff8551 | 183 | * platform_get_irq_byname - get an IRQ for a device by name |
4a3ad20c GKH |
184 | * @dev: platform device |
185 | * @name: IRQ name | |
1da177e4 | 186 | */ |
c0afe7ba | 187 | int platform_get_irq_byname(struct platform_device *dev, const char *name) |
1da177e4 | 188 | { |
ad69674e GS |
189 | struct resource *r; |
190 | ||
aff008ad GR |
191 | if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) { |
192 | int ret; | |
193 | ||
194 | ret = of_irq_get_byname(dev->dev.of_node, name); | |
e330b9a6 | 195 | if (ret > 0 || ret == -EPROBE_DEFER) |
aff008ad GR |
196 | return ret; |
197 | } | |
1da177e4 | 198 | |
ad69674e | 199 | r = platform_get_resource_byname(dev, IORESOURCE_IRQ, name); |
305b3228 | 200 | return r ? r->start : -ENXIO; |
1da177e4 | 201 | } |
a96b2042 | 202 | EXPORT_SYMBOL_GPL(platform_get_irq_byname); |
1da177e4 LT |
203 | |
204 | /** | |
4a3ad20c GKH |
205 | * platform_add_devices - add a numbers of platform devices |
206 | * @devs: array of platform devices to add | |
207 | * @num: number of platform devices in array | |
1da177e4 LT |
208 | */ |
209 | int platform_add_devices(struct platform_device **devs, int num) | |
210 | { | |
211 | int i, ret = 0; | |
212 | ||
213 | for (i = 0; i < num; i++) { | |
214 | ret = platform_device_register(devs[i]); | |
215 | if (ret) { | |
216 | while (--i >= 0) | |
217 | platform_device_unregister(devs[i]); | |
218 | break; | |
219 | } | |
220 | } | |
221 | ||
222 | return ret; | |
223 | } | |
a96b2042 | 224 | EXPORT_SYMBOL_GPL(platform_add_devices); |
1da177e4 | 225 | |
37c12e74 RK |
226 | struct platform_object { |
227 | struct platform_device pdev; | |
1cec24c5 | 228 | char name[]; |
37c12e74 RK |
229 | }; |
230 | ||
1da177e4 | 231 | /** |
3c31f07a | 232 | * platform_device_put - destroy a platform device |
4a3ad20c | 233 | * @pdev: platform device to free |
37c12e74 | 234 | * |
4a3ad20c GKH |
235 | * Free all memory associated with a platform device. This function must |
236 | * _only_ be externally called in error cases. All other usage is a bug. | |
37c12e74 RK |
237 | */ |
238 | void platform_device_put(struct platform_device *pdev) | |
239 | { | |
240 | if (pdev) | |
241 | put_device(&pdev->dev); | |
242 | } | |
243 | EXPORT_SYMBOL_GPL(platform_device_put); | |
244 | ||
245 | static void platform_device_release(struct device *dev) | |
246 | { | |
4a3ad20c GKH |
247 | struct platform_object *pa = container_of(dev, struct platform_object, |
248 | pdev.dev); | |
37c12e74 | 249 | |
7096d042 | 250 | of_device_node_put(&pa->pdev.dev); |
37c12e74 | 251 | kfree(pa->pdev.dev.platform_data); |
e710d7d5 | 252 | kfree(pa->pdev.mfd_cell); |
37c12e74 | 253 | kfree(pa->pdev.resource); |
3d713e0e | 254 | kfree(pa->pdev.driver_override); |
37c12e74 RK |
255 | kfree(pa); |
256 | } | |
257 | ||
258 | /** | |
3c31f07a | 259 | * platform_device_alloc - create a platform device |
4a3ad20c GKH |
260 | * @name: base name of the device we're adding |
261 | * @id: instance id | |
37c12e74 | 262 | * |
4a3ad20c GKH |
263 | * Create a platform device object which can have other objects attached |
264 | * to it, and which will have attached objects freed when it is released. | |
37c12e74 | 265 | */ |
1359555e | 266 | struct platform_device *platform_device_alloc(const char *name, int id) |
37c12e74 RK |
267 | { |
268 | struct platform_object *pa; | |
269 | ||
1cec24c5 | 270 | pa = kzalloc(sizeof(*pa) + strlen(name) + 1, GFP_KERNEL); |
37c12e74 RK |
271 | if (pa) { |
272 | strcpy(pa->name, name); | |
273 | pa->pdev.name = pa->name; | |
274 | pa->pdev.id = id; | |
275 | device_initialize(&pa->pdev.dev); | |
276 | pa->pdev.dev.release = platform_device_release; | |
a77ce816 | 277 | arch_setup_pdev_archdata(&pa->pdev); |
37c12e74 RK |
278 | } |
279 | ||
93ce3061 | 280 | return pa ? &pa->pdev : NULL; |
37c12e74 RK |
281 | } |
282 | EXPORT_SYMBOL_GPL(platform_device_alloc); | |
283 | ||
284 | /** | |
3c31f07a | 285 | * platform_device_add_resources - add resources to a platform device |
4a3ad20c GKH |
286 | * @pdev: platform device allocated by platform_device_alloc to add resources to |
287 | * @res: set of resources that needs to be allocated for the device | |
288 | * @num: number of resources | |
37c12e74 | 289 | * |
4a3ad20c GKH |
290 | * Add a copy of the resources to the platform device. The memory |
291 | * associated with the resources will be freed when the platform device is | |
292 | * released. | |
37c12e74 | 293 | */ |
4a3ad20c | 294 | int platform_device_add_resources(struct platform_device *pdev, |
0b7f1a7e | 295 | const struct resource *res, unsigned int num) |
37c12e74 | 296 | { |
cea89623 | 297 | struct resource *r = NULL; |
37c12e74 | 298 | |
cea89623 UKK |
299 | if (res) { |
300 | r = kmemdup(res, sizeof(struct resource) * num, GFP_KERNEL); | |
301 | if (!r) | |
302 | return -ENOMEM; | |
37c12e74 | 303 | } |
cea89623 | 304 | |
4a03d6f7 | 305 | kfree(pdev->resource); |
cea89623 UKK |
306 | pdev->resource = r; |
307 | pdev->num_resources = num; | |
308 | return 0; | |
37c12e74 RK |
309 | } |
310 | EXPORT_SYMBOL_GPL(platform_device_add_resources); | |
311 | ||
312 | /** | |
3c31f07a | 313 | * platform_device_add_data - add platform-specific data to a platform device |
4a3ad20c GKH |
314 | * @pdev: platform device allocated by platform_device_alloc to add resources to |
315 | * @data: platform specific data for this platform device | |
316 | * @size: size of platform specific data | |
37c12e74 | 317 | * |
4a3ad20c GKH |
318 | * Add a copy of platform specific data to the platform device's |
319 | * platform_data pointer. The memory associated with the platform data | |
320 | * will be freed when the platform device is released. | |
37c12e74 | 321 | */ |
4a3ad20c GKH |
322 | int platform_device_add_data(struct platform_device *pdev, const void *data, |
323 | size_t size) | |
37c12e74 | 324 | { |
27a33f9e | 325 | void *d = NULL; |
5cfc64ce | 326 | |
27a33f9e UKK |
327 | if (data) { |
328 | d = kmemdup(data, size, GFP_KERNEL); | |
329 | if (!d) | |
330 | return -ENOMEM; | |
37c12e74 | 331 | } |
27a33f9e | 332 | |
251e031d | 333 | kfree(pdev->dev.platform_data); |
27a33f9e UKK |
334 | pdev->dev.platform_data = d; |
335 | return 0; | |
37c12e74 RK |
336 | } |
337 | EXPORT_SYMBOL_GPL(platform_device_add_data); | |
338 | ||
00bbc1d8 MW |
339 | /** |
340 | * platform_device_add_properties - add built-in properties to a platform device | |
341 | * @pdev: platform device to add properties to | |
f4d05266 | 342 | * @properties: null terminated array of properties to add |
00bbc1d8 | 343 | * |
f4d05266 HK |
344 | * The function will take deep copy of @properties and attach the copy to the |
345 | * platform device. The memory associated with properties will be freed when the | |
346 | * platform device is released. | |
00bbc1d8 MW |
347 | */ |
348 | int platform_device_add_properties(struct platform_device *pdev, | |
277036f0 | 349 | const struct property_entry *properties) |
00bbc1d8 | 350 | { |
f4d05266 | 351 | return device_add_properties(&pdev->dev, properties); |
00bbc1d8 MW |
352 | } |
353 | EXPORT_SYMBOL_GPL(platform_device_add_properties); | |
354 | ||
37c12e74 | 355 | /** |
4a3ad20c GKH |
356 | * platform_device_add - add a platform device to device hierarchy |
357 | * @pdev: platform device we're adding | |
1da177e4 | 358 | * |
4a3ad20c GKH |
359 | * This is part 2 of platform_device_register(), though may be called |
360 | * separately _iff_ pdev was allocated by platform_device_alloc(). | |
1da177e4 | 361 | */ |
37c12e74 | 362 | int platform_device_add(struct platform_device *pdev) |
1da177e4 | 363 | { |
062cfcd8 SS |
364 | u32 i; |
365 | int ret; | |
1da177e4 LT |
366 | |
367 | if (!pdev) | |
368 | return -EINVAL; | |
369 | ||
370 | if (!pdev->dev.parent) | |
371 | pdev->dev.parent = &platform_bus; | |
372 | ||
373 | pdev->dev.bus = &platform_bus_type; | |
374 | ||
689ae231 JD |
375 | switch (pdev->id) { |
376 | default: | |
1e0b2cf9 | 377 | dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); |
689ae231 JD |
378 | break; |
379 | case PLATFORM_DEVID_NONE: | |
acc0e90f | 380 | dev_set_name(&pdev->dev, "%s", pdev->name); |
689ae231 JD |
381 | break; |
382 | case PLATFORM_DEVID_AUTO: | |
383 | /* | |
384 | * Automatically allocated device ID. We mark it as such so | |
385 | * that we remember it must be freed, and we append a suffix | |
386 | * to avoid namespace collision with explicit IDs. | |
387 | */ | |
388 | ret = ida_simple_get(&platform_devid_ida, 0, 0, GFP_KERNEL); | |
389 | if (ret < 0) | |
5da7f709 | 390 | goto err_out; |
689ae231 JD |
391 | pdev->id = ret; |
392 | pdev->id_auto = true; | |
393 | dev_set_name(&pdev->dev, "%s.%d.auto", pdev->name, pdev->id); | |
394 | break; | |
395 | } | |
1da177e4 LT |
396 | |
397 | for (i = 0; i < pdev->num_resources; i++) { | |
5da7f709 | 398 | struct resource *p, *r = &pdev->resource[i]; |
1da177e4 LT |
399 | |
400 | if (r->name == NULL) | |
1e0b2cf9 | 401 | r->name = dev_name(&pdev->dev); |
1da177e4 LT |
402 | |
403 | p = r->parent; | |
404 | if (!p) { | |
0e6c861f | 405 | if (resource_type(r) == IORESOURCE_MEM) |
1da177e4 | 406 | p = &iomem_resource; |
0e6c861f | 407 | else if (resource_type(r) == IORESOURCE_IO) |
1da177e4 LT |
408 | p = &ioport_resource; |
409 | } | |
410 | ||
0e6c861f | 411 | if (p && insert_resource(p, r)) { |
8a18f428 | 412 | dev_err(&pdev->dev, "failed to claim resource %d: %pR\n", i, r); |
5da7f709 GKH |
413 | ret = -EBUSY; |
414 | goto failed; | |
415 | } | |
1da177e4 LT |
416 | } |
417 | ||
418 | pr_debug("Registering platform device '%s'. Parent at %s\n", | |
1e0b2cf9 | 419 | dev_name(&pdev->dev), dev_name(pdev->dev.parent)); |
1da177e4 | 420 | |
e3915532 | 421 | ret = device_add(&pdev->dev); |
8b2dceba GKH |
422 | if (ret == 0) |
423 | return ret; | |
424 | ||
5da7f709 | 425 | failed: |
8b2dceba GKH |
426 | if (pdev->id_auto) { |
427 | ida_simple_remove(&platform_devid_ida, pdev->id); | |
428 | pdev->id = PLATFORM_DEVID_AUTO; | |
429 | } | |
430 | ||
cb259e08 | 431 | while (i--) { |
8b2dceba | 432 | struct resource *r = &pdev->resource[i]; |
7f5dcaf1 | 433 | if (r->parent) |
8b2dceba GKH |
434 | release_resource(r); |
435 | } | |
c9f66169 | 436 | |
5da7f709 | 437 | err_out: |
1da177e4 LT |
438 | return ret; |
439 | } | |
37c12e74 RK |
440 | EXPORT_SYMBOL_GPL(platform_device_add); |
441 | ||
442 | /** | |
4a3ad20c GKH |
443 | * platform_device_del - remove a platform-level device |
444 | * @pdev: platform device we're removing | |
1da177e4 | 445 | * |
4a3ad20c GKH |
446 | * Note that this function will also release all memory- and port-based |
447 | * resources owned by the device (@dev->resource). This function must | |
448 | * _only_ be externally called in error cases. All other usage is a bug. | |
1da177e4 | 449 | */ |
93ce3061 | 450 | void platform_device_del(struct platform_device *pdev) |
1da177e4 | 451 | { |
062cfcd8 | 452 | u32 i; |
c9f66169 | 453 | |
8b2dceba | 454 | if (pdev) { |
c90aab9c | 455 | device_remove_properties(&pdev->dev); |
8b2dceba GKH |
456 | device_del(&pdev->dev); |
457 | ||
458 | if (pdev->id_auto) { | |
459 | ida_simple_remove(&platform_devid_ida, pdev->id); | |
460 | pdev->id = PLATFORM_DEVID_AUTO; | |
461 | } | |
462 | ||
463 | for (i = 0; i < pdev->num_resources; i++) { | |
464 | struct resource *r = &pdev->resource[i]; | |
7f5dcaf1 | 465 | if (r->parent) |
8b2dceba GKH |
466 | release_resource(r); |
467 | } | |
468 | } | |
1da177e4 | 469 | } |
93ce3061 DT |
470 | EXPORT_SYMBOL_GPL(platform_device_del); |
471 | ||
472 | /** | |
4a3ad20c GKH |
473 | * platform_device_register - add a platform-level device |
474 | * @pdev: platform device we're adding | |
93ce3061 | 475 | */ |
4a3ad20c | 476 | int platform_device_register(struct platform_device *pdev) |
93ce3061 DT |
477 | { |
478 | device_initialize(&pdev->dev); | |
a77ce816 | 479 | arch_setup_pdev_archdata(pdev); |
93ce3061 DT |
480 | return platform_device_add(pdev); |
481 | } | |
a96b2042 | 482 | EXPORT_SYMBOL_GPL(platform_device_register); |
93ce3061 DT |
483 | |
484 | /** | |
4a3ad20c GKH |
485 | * platform_device_unregister - unregister a platform-level device |
486 | * @pdev: platform device we're unregistering | |
93ce3061 | 487 | * |
4a3ad20c GKH |
488 | * Unregistration is done in 2 steps. First we release all resources |
489 | * and remove it from the subsystem, then we drop reference count by | |
490 | * calling platform_device_put(). | |
93ce3061 | 491 | */ |
4a3ad20c | 492 | void platform_device_unregister(struct platform_device *pdev) |
93ce3061 DT |
493 | { |
494 | platform_device_del(pdev); | |
495 | platform_device_put(pdev); | |
496 | } | |
a96b2042 | 497 | EXPORT_SYMBOL_GPL(platform_device_unregister); |
1da177e4 | 498 | |
1da177e4 | 499 | /** |
01dcc60a | 500 | * platform_device_register_full - add a platform-level device with |
44f28bde | 501 | * resources and platform-specific data |
49a4ec18 | 502 | * |
01dcc60a | 503 | * @pdevinfo: data used to create device |
d8bf2540 | 504 | * |
f0eae0ed | 505 | * Returns &struct platform_device pointer on success, or ERR_PTR() on error. |
d8bf2540 | 506 | */ |
01dcc60a | 507 | struct platform_device *platform_device_register_full( |
5a3072be | 508 | const struct platform_device_info *pdevinfo) |
d8bf2540 | 509 | { |
44f28bde | 510 | int ret = -ENOMEM; |
d8bf2540 | 511 | struct platform_device *pdev; |
d8bf2540 | 512 | |
01dcc60a | 513 | pdev = platform_device_alloc(pdevinfo->name, pdevinfo->id); |
44f28bde | 514 | if (!pdev) |
01dcc60a UKK |
515 | goto err_alloc; |
516 | ||
517 | pdev->dev.parent = pdevinfo->parent; | |
ce793486 | 518 | pdev->dev.fwnode = pdevinfo->fwnode; |
01dcc60a UKK |
519 | |
520 | if (pdevinfo->dma_mask) { | |
521 | /* | |
522 | * This memory isn't freed when the device is put, | |
523 | * I don't have a nice idea for that though. Conceptually | |
524 | * dma_mask in struct device should not be a pointer. | |
525 | * See http://thread.gmane.org/gmane.linux.kernel.pci/9081 | |
526 | */ | |
527 | pdev->dev.dma_mask = | |
528 | kmalloc(sizeof(*pdev->dev.dma_mask), GFP_KERNEL); | |
529 | if (!pdev->dev.dma_mask) | |
530 | goto err; | |
531 | ||
30e1e000 QC |
532 | kmemleak_ignore(pdev->dev.dma_mask); |
533 | ||
01dcc60a UKK |
534 | *pdev->dev.dma_mask = pdevinfo->dma_mask; |
535 | pdev->dev.coherent_dma_mask = pdevinfo->dma_mask; | |
536 | } | |
d8bf2540 | 537 | |
01dcc60a UKK |
538 | ret = platform_device_add_resources(pdev, |
539 | pdevinfo->res, pdevinfo->num_res); | |
807508c8 AV |
540 | if (ret) |
541 | goto err; | |
44f28bde | 542 | |
01dcc60a UKK |
543 | ret = platform_device_add_data(pdev, |
544 | pdevinfo->data, pdevinfo->size_data); | |
807508c8 AV |
545 | if (ret) |
546 | goto err; | |
d8bf2540 | 547 | |
f4d05266 HK |
548 | if (pdevinfo->properties) { |
549 | ret = platform_device_add_properties(pdev, | |
550 | pdevinfo->properties); | |
00bbc1d8 MW |
551 | if (ret) |
552 | goto err; | |
553 | } | |
554 | ||
44f28bde UKK |
555 | ret = platform_device_add(pdev); |
556 | if (ret) { | |
557 | err: | |
7b199811 | 558 | ACPI_COMPANION_SET(&pdev->dev, NULL); |
01dcc60a UKK |
559 | kfree(pdev->dev.dma_mask); |
560 | ||
561 | err_alloc: | |
44f28bde UKK |
562 | platform_device_put(pdev); |
563 | return ERR_PTR(ret); | |
564 | } | |
d8bf2540 DB |
565 | |
566 | return pdev; | |
d8bf2540 | 567 | } |
01dcc60a | 568 | EXPORT_SYMBOL_GPL(platform_device_register_full); |
d8bf2540 | 569 | |
00d3dcdd RK |
570 | static int platform_drv_probe(struct device *_dev) |
571 | { | |
572 | struct platform_driver *drv = to_platform_driver(_dev->driver); | |
573 | struct platform_device *dev = to_platform_device(_dev); | |
94d76d5d | 574 | int ret; |
00d3dcdd | 575 | |
86be408b SN |
576 | ret = of_clk_set_defaults(_dev->of_node, false); |
577 | if (ret < 0) | |
578 | return ret; | |
579 | ||
cb518413 | 580 | ret = dev_pm_domain_attach(_dev, true); |
25cad69f MW |
581 | if (ret != -EPROBE_DEFER) { |
582 | if (drv->probe) { | |
583 | ret = drv->probe(dev); | |
584 | if (ret) | |
585 | dev_pm_domain_detach(_dev, true); | |
586 | } else { | |
587 | /* don't fail if just dev_pm_domain_attach failed */ | |
588 | ret = 0; | |
589 | } | |
cb518413 | 590 | } |
94d76d5d | 591 | |
3f9120b0 JH |
592 | if (drv->prevent_deferred_probe && ret == -EPROBE_DEFER) { |
593 | dev_warn(_dev, "probe deferral not supported\n"); | |
594 | ret = -ENXIO; | |
595 | } | |
596 | ||
94d76d5d | 597 | return ret; |
00d3dcdd RK |
598 | } |
599 | ||
c67334fb DB |
600 | static int platform_drv_probe_fail(struct device *_dev) |
601 | { | |
602 | return -ENXIO; | |
603 | } | |
604 | ||
00d3dcdd RK |
605 | static int platform_drv_remove(struct device *_dev) |
606 | { | |
607 | struct platform_driver *drv = to_platform_driver(_dev->driver); | |
608 | struct platform_device *dev = to_platform_device(_dev); | |
b8b2c7d8 | 609 | int ret = 0; |
00d3dcdd | 610 | |
b8b2c7d8 UKK |
611 | if (drv->remove) |
612 | ret = drv->remove(dev); | |
cb518413 | 613 | dev_pm_domain_detach(_dev, true); |
94d76d5d RW |
614 | |
615 | return ret; | |
00d3dcdd RK |
616 | } |
617 | ||
618 | static void platform_drv_shutdown(struct device *_dev) | |
619 | { | |
620 | struct platform_driver *drv = to_platform_driver(_dev->driver); | |
621 | struct platform_device *dev = to_platform_device(_dev); | |
622 | ||
b8b2c7d8 UKK |
623 | if (drv->shutdown) |
624 | drv->shutdown(dev); | |
00d3dcdd RK |
625 | } |
626 | ||
00d3dcdd | 627 | /** |
9447057e | 628 | * __platform_driver_register - register a driver for platform-level devices |
4a3ad20c | 629 | * @drv: platform driver structure |
08801f96 | 630 | * @owner: owning module/driver |
00d3dcdd | 631 | */ |
9447057e LC |
632 | int __platform_driver_register(struct platform_driver *drv, |
633 | struct module *owner) | |
00d3dcdd | 634 | { |
9447057e | 635 | drv->driver.owner = owner; |
00d3dcdd | 636 | drv->driver.bus = &platform_bus_type; |
b8b2c7d8 UKK |
637 | drv->driver.probe = platform_drv_probe; |
638 | drv->driver.remove = platform_drv_remove; | |
639 | drv->driver.shutdown = platform_drv_shutdown; | |
783ea7d4 | 640 | |
00d3dcdd RK |
641 | return driver_register(&drv->driver); |
642 | } | |
9447057e | 643 | EXPORT_SYMBOL_GPL(__platform_driver_register); |
00d3dcdd RK |
644 | |
645 | /** | |
3c31f07a | 646 | * platform_driver_unregister - unregister a driver for platform-level devices |
4a3ad20c | 647 | * @drv: platform driver structure |
00d3dcdd RK |
648 | */ |
649 | void platform_driver_unregister(struct platform_driver *drv) | |
650 | { | |
651 | driver_unregister(&drv->driver); | |
652 | } | |
653 | EXPORT_SYMBOL_GPL(platform_driver_unregister); | |
654 | ||
c67334fb | 655 | /** |
c3b50dc2 | 656 | * __platform_driver_probe - register driver for non-hotpluggable device |
c67334fb | 657 | * @drv: platform driver structure |
3f9120b0 | 658 | * @probe: the driver probe routine, probably from an __init section |
c3b50dc2 | 659 | * @module: module which will be the owner of the driver |
c67334fb DB |
660 | * |
661 | * Use this instead of platform_driver_register() when you know the device | |
662 | * is not hotpluggable and has already been registered, and you want to | |
663 | * remove its run-once probe() infrastructure from memory after the driver | |
664 | * has bound to the device. | |
665 | * | |
666 | * One typical use for this would be with drivers for controllers integrated | |
667 | * into system-on-chip processors, where the controller devices have been | |
668 | * configured as part of board setup. | |
669 | * | |
3f9120b0 | 670 | * Note that this is incompatible with deferred probing. |
647c86d0 | 671 | * |
c67334fb DB |
672 | * Returns zero if the driver registered and bound to a device, else returns |
673 | * a negative error code and with the driver not registered. | |
674 | */ | |
c3b50dc2 WS |
675 | int __init_or_module __platform_driver_probe(struct platform_driver *drv, |
676 | int (*probe)(struct platform_device *), struct module *module) | |
c67334fb DB |
677 | { |
678 | int retval, code; | |
679 | ||
5c36eb2a DT |
680 | if (drv->driver.probe_type == PROBE_PREFER_ASYNCHRONOUS) { |
681 | pr_err("%s: drivers registered with %s can not be probed asynchronously\n", | |
682 | drv->driver.name, __func__); | |
683 | return -EINVAL; | |
684 | } | |
685 | ||
686 | /* | |
687 | * We have to run our probes synchronously because we check if | |
688 | * we find any devices to bind to and exit with error if there | |
689 | * are any. | |
690 | */ | |
691 | drv->driver.probe_type = PROBE_FORCE_SYNCHRONOUS; | |
692 | ||
3f9120b0 JH |
693 | /* |
694 | * Prevent driver from requesting probe deferral to avoid further | |
695 | * futile probe attempts. | |
696 | */ | |
697 | drv->prevent_deferred_probe = true; | |
698 | ||
1a6f2a75 DT |
699 | /* make sure driver won't have bind/unbind attributes */ |
700 | drv->driver.suppress_bind_attrs = true; | |
701 | ||
c67334fb DB |
702 | /* temporary section violation during probe() */ |
703 | drv->probe = probe; | |
c3b50dc2 | 704 | retval = code = __platform_driver_register(drv, module); |
790c3729 KS |
705 | if (retval) |
706 | return retval; | |
c67334fb | 707 | |
1a6f2a75 DT |
708 | /* |
709 | * Fixup that section violation, being paranoid about code scanning | |
c67334fb DB |
710 | * the list of drivers in order to probe new devices. Check to see |
711 | * if the probe was successful, and make sure any forced probes of | |
712 | * new devices fail. | |
713 | */ | |
d79d3244 | 714 | spin_lock(&drv->driver.bus->p->klist_drivers.k_lock); |
c67334fb | 715 | drv->probe = NULL; |
e5dd1278 | 716 | if (code == 0 && list_empty(&drv->driver.p->klist_devices.k_list)) |
c67334fb DB |
717 | retval = -ENODEV; |
718 | drv->driver.probe = platform_drv_probe_fail; | |
d79d3244 | 719 | spin_unlock(&drv->driver.bus->p->klist_drivers.k_lock); |
c67334fb DB |
720 | |
721 | if (code != retval) | |
722 | platform_driver_unregister(drv); | |
723 | return retval; | |
724 | } | |
c3b50dc2 | 725 | EXPORT_SYMBOL_GPL(__platform_driver_probe); |
1da177e4 | 726 | |
ecdf6ceb | 727 | /** |
291f653a | 728 | * __platform_create_bundle - register driver and create corresponding device |
ecdf6ceb DT |
729 | * @driver: platform driver structure |
730 | * @probe: the driver probe routine, probably from an __init section | |
731 | * @res: set of resources that needs to be allocated for the device | |
732 | * @n_res: number of resources | |
733 | * @data: platform specific data for this platform device | |
734 | * @size: size of platform specific data | |
291f653a | 735 | * @module: module which will be the owner of the driver |
ecdf6ceb DT |
736 | * |
737 | * Use this in legacy-style modules that probe hardware directly and | |
738 | * register a single platform device and corresponding platform driver. | |
f0eae0ed JN |
739 | * |
740 | * Returns &struct platform_device pointer on success, or ERR_PTR() on error. | |
ecdf6ceb | 741 | */ |
291f653a | 742 | struct platform_device * __init_or_module __platform_create_bundle( |
ecdf6ceb DT |
743 | struct platform_driver *driver, |
744 | int (*probe)(struct platform_device *), | |
745 | struct resource *res, unsigned int n_res, | |
291f653a | 746 | const void *data, size_t size, struct module *module) |
ecdf6ceb DT |
747 | { |
748 | struct platform_device *pdev; | |
749 | int error; | |
750 | ||
751 | pdev = platform_device_alloc(driver->driver.name, -1); | |
752 | if (!pdev) { | |
753 | error = -ENOMEM; | |
754 | goto err_out; | |
755 | } | |
756 | ||
807508c8 AV |
757 | error = platform_device_add_resources(pdev, res, n_res); |
758 | if (error) | |
759 | goto err_pdev_put; | |
ecdf6ceb | 760 | |
807508c8 AV |
761 | error = platform_device_add_data(pdev, data, size); |
762 | if (error) | |
763 | goto err_pdev_put; | |
ecdf6ceb DT |
764 | |
765 | error = platform_device_add(pdev); | |
766 | if (error) | |
767 | goto err_pdev_put; | |
768 | ||
291f653a | 769 | error = __platform_driver_probe(driver, probe, module); |
ecdf6ceb DT |
770 | if (error) |
771 | goto err_pdev_del; | |
772 | ||
773 | return pdev; | |
774 | ||
775 | err_pdev_del: | |
776 | platform_device_del(pdev); | |
777 | err_pdev_put: | |
778 | platform_device_put(pdev); | |
779 | err_out: | |
780 | return ERR_PTR(error); | |
781 | } | |
291f653a | 782 | EXPORT_SYMBOL_GPL(__platform_create_bundle); |
ecdf6ceb | 783 | |
dbe2256d TR |
784 | /** |
785 | * __platform_register_drivers - register an array of platform drivers | |
786 | * @drivers: an array of drivers to register | |
787 | * @count: the number of drivers to register | |
788 | * @owner: module owning the drivers | |
789 | * | |
790 | * Registers platform drivers specified by an array. On failure to register a | |
791 | * driver, all previously registered drivers will be unregistered. Callers of | |
792 | * this API should use platform_unregister_drivers() to unregister drivers in | |
793 | * the reverse order. | |
794 | * | |
795 | * Returns: 0 on success or a negative error code on failure. | |
796 | */ | |
797 | int __platform_register_drivers(struct platform_driver * const *drivers, | |
798 | unsigned int count, struct module *owner) | |
799 | { | |
800 | unsigned int i; | |
801 | int err; | |
802 | ||
803 | for (i = 0; i < count; i++) { | |
804 | pr_debug("registering platform driver %ps\n", drivers[i]); | |
805 | ||
806 | err = __platform_driver_register(drivers[i], owner); | |
807 | if (err < 0) { | |
808 | pr_err("failed to register platform driver %ps: %d\n", | |
809 | drivers[i], err); | |
810 | goto error; | |
811 | } | |
812 | } | |
813 | ||
814 | return 0; | |
815 | ||
816 | error: | |
817 | while (i--) { | |
818 | pr_debug("unregistering platform driver %ps\n", drivers[i]); | |
819 | platform_driver_unregister(drivers[i]); | |
820 | } | |
821 | ||
822 | return err; | |
823 | } | |
824 | EXPORT_SYMBOL_GPL(__platform_register_drivers); | |
825 | ||
826 | /** | |
827 | * platform_unregister_drivers - unregister an array of platform drivers | |
828 | * @drivers: an array of drivers to unregister | |
829 | * @count: the number of drivers to unregister | |
830 | * | |
831 | * Unegisters platform drivers specified by an array. This is typically used | |
832 | * to complement an earlier call to platform_register_drivers(). Drivers are | |
833 | * unregistered in the reverse order in which they were registered. | |
834 | */ | |
835 | void platform_unregister_drivers(struct platform_driver * const *drivers, | |
836 | unsigned int count) | |
837 | { | |
838 | while (count--) { | |
839 | pr_debug("unregistering platform driver %ps\n", drivers[count]); | |
840 | platform_driver_unregister(drivers[count]); | |
841 | } | |
842 | } | |
843 | EXPORT_SYMBOL_GPL(platform_unregister_drivers); | |
844 | ||
a0245f7a DB |
845 | /* modalias support enables more hands-off userspace setup: |
846 | * (a) environment variable lets new-style hotplug events work once system is | |
847 | * fully running: "modprobe $MODALIAS" | |
848 | * (b) sysfs attribute lets new-style coldplug recover from hotplug events | |
849 | * mishandled before system is fully running: "modprobe $(cat modalias)" | |
850 | */ | |
4a3ad20c GKH |
851 | static ssize_t modalias_show(struct device *dev, struct device_attribute *a, |
852 | char *buf) | |
a0245f7a DB |
853 | { |
854 | struct platform_device *pdev = to_platform_device(dev); | |
8c4ff6d0 ZR |
855 | int len; |
856 | ||
0634c295 | 857 | len = of_device_modalias(dev, buf, PAGE_SIZE); |
b9f73067 ZR |
858 | if (len != -ENODEV) |
859 | return len; | |
860 | ||
8c4ff6d0 ZR |
861 | len = acpi_device_modalias(dev, buf, PAGE_SIZE -1); |
862 | if (len != -ENODEV) | |
863 | return len; | |
864 | ||
865 | len = snprintf(buf, PAGE_SIZE, "platform:%s\n", pdev->name); | |
a0245f7a DB |
866 | |
867 | return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len; | |
868 | } | |
d06262e5 | 869 | static DEVICE_ATTR_RO(modalias); |
a0245f7a | 870 | |
3d713e0e KP |
871 | static ssize_t driver_override_store(struct device *dev, |
872 | struct device_attribute *attr, | |
873 | const char *buf, size_t count) | |
874 | { | |
875 | struct platform_device *pdev = to_platform_device(dev); | |
62655397 | 876 | char *driver_override, *old, *cp; |
3d713e0e | 877 | |
bf563b01 NS |
878 | /* We need to keep extra room for a newline */ |
879 | if (count >= (PAGE_SIZE - 1)) | |
3d713e0e KP |
880 | return -EINVAL; |
881 | ||
882 | driver_override = kstrndup(buf, count, GFP_KERNEL); | |
883 | if (!driver_override) | |
884 | return -ENOMEM; | |
885 | ||
886 | cp = strchr(driver_override, '\n'); | |
887 | if (cp) | |
888 | *cp = '\0'; | |
889 | ||
62655397 AS |
890 | device_lock(dev); |
891 | old = pdev->driver_override; | |
3d713e0e KP |
892 | if (strlen(driver_override)) { |
893 | pdev->driver_override = driver_override; | |
894 | } else { | |
895 | kfree(driver_override); | |
896 | pdev->driver_override = NULL; | |
897 | } | |
62655397 | 898 | device_unlock(dev); |
3d713e0e KP |
899 | |
900 | kfree(old); | |
901 | ||
902 | return count; | |
903 | } | |
904 | ||
905 | static ssize_t driver_override_show(struct device *dev, | |
906 | struct device_attribute *attr, char *buf) | |
907 | { | |
908 | struct platform_device *pdev = to_platform_device(dev); | |
62655397 | 909 | ssize_t len; |
3d713e0e | 910 | |
62655397 AS |
911 | device_lock(dev); |
912 | len = sprintf(buf, "%s\n", pdev->driver_override); | |
913 | device_unlock(dev); | |
914 | return len; | |
3d713e0e KP |
915 | } |
916 | static DEVICE_ATTR_RW(driver_override); | |
917 | ||
918 | ||
d06262e5 GKH |
919 | static struct attribute *platform_dev_attrs[] = { |
920 | &dev_attr_modalias.attr, | |
3d713e0e | 921 | &dev_attr_driver_override.attr, |
d06262e5 | 922 | NULL, |
a0245f7a | 923 | }; |
d06262e5 | 924 | ATTRIBUTE_GROUPS(platform_dev); |
a0245f7a | 925 | |
7eff2e7a | 926 | static int platform_uevent(struct device *dev, struct kobj_uevent_env *env) |
a0245f7a DB |
927 | { |
928 | struct platform_device *pdev = to_platform_device(dev); | |
eca39301 GL |
929 | int rc; |
930 | ||
931 | /* Some devices have extra OF data and an OF-style MODALIAS */ | |
0258e182 | 932 | rc = of_device_uevent_modalias(dev, env); |
eca39301 GL |
933 | if (rc != -ENODEV) |
934 | return rc; | |
a0245f7a | 935 | |
8c4ff6d0 ZR |
936 | rc = acpi_device_uevent_modalias(dev, env); |
937 | if (rc != -ENODEV) | |
938 | return rc; | |
939 | ||
57fee4a5 | 940 | add_uevent_var(env, "MODALIAS=%s%s", PLATFORM_MODULE_PREFIX, |
0a26813c | 941 | pdev->name); |
a0245f7a DB |
942 | return 0; |
943 | } | |
944 | ||
57fee4a5 | 945 | static const struct platform_device_id *platform_match_id( |
831fad2f | 946 | const struct platform_device_id *id, |
57fee4a5 EM |
947 | struct platform_device *pdev) |
948 | { | |
949 | while (id->name[0]) { | |
950 | if (strcmp(pdev->name, id->name) == 0) { | |
951 | pdev->id_entry = id; | |
952 | return id; | |
953 | } | |
954 | id++; | |
955 | } | |
956 | return NULL; | |
957 | } | |
958 | ||
1da177e4 | 959 | /** |
4a3ad20c GKH |
960 | * platform_match - bind platform device to platform driver. |
961 | * @dev: device. | |
962 | * @drv: driver. | |
1da177e4 | 963 | * |
4a3ad20c GKH |
964 | * Platform device IDs are assumed to be encoded like this: |
965 | * "<name><instance>", where <name> is a short description of the type of | |
966 | * device, like "pci" or "floppy", and <instance> is the enumerated | |
967 | * instance of the device, like '0' or '42'. Driver IDs are simply | |
968 | * "<name>". So, extract the <name> from the platform_device structure, | |
969 | * and compare it against the name of the driver. Return whether they match | |
970 | * or not. | |
1da177e4 | 971 | */ |
4a3ad20c | 972 | static int platform_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 973 | { |
71b3e0c1 | 974 | struct platform_device *pdev = to_platform_device(dev); |
57fee4a5 EM |
975 | struct platform_driver *pdrv = to_platform_driver(drv); |
976 | ||
3d713e0e KP |
977 | /* When driver_override is set, only bind to the matching driver */ |
978 | if (pdev->driver_override) | |
979 | return !strcmp(pdev->driver_override, drv->name); | |
980 | ||
05212157 GL |
981 | /* Attempt an OF style match first */ |
982 | if (of_driver_match_device(dev, drv)) | |
983 | return 1; | |
984 | ||
91e56878 MW |
985 | /* Then try ACPI style match */ |
986 | if (acpi_driver_match_device(dev, drv)) | |
987 | return 1; | |
988 | ||
05212157 | 989 | /* Then try to match against the id table */ |
57fee4a5 EM |
990 | if (pdrv->id_table) |
991 | return platform_match_id(pdrv->id_table, pdev) != NULL; | |
1da177e4 | 992 | |
57fee4a5 | 993 | /* fall-back to driver name match */ |
1e0b2cf9 | 994 | return (strcmp(pdev->name, drv->name) == 0); |
1da177e4 LT |
995 | } |
996 | ||
25e18499 RW |
997 | #ifdef CONFIG_PM_SLEEP |
998 | ||
999 | static int platform_legacy_suspend(struct device *dev, pm_message_t mesg) | |
1da177e4 | 1000 | { |
783ea7d4 MD |
1001 | struct platform_driver *pdrv = to_platform_driver(dev->driver); |
1002 | struct platform_device *pdev = to_platform_device(dev); | |
1da177e4 LT |
1003 | int ret = 0; |
1004 | ||
783ea7d4 MD |
1005 | if (dev->driver && pdrv->suspend) |
1006 | ret = pdrv->suspend(pdev, mesg); | |
386415d8 DB |
1007 | |
1008 | return ret; | |
1009 | } | |
1010 | ||
25e18499 | 1011 | static int platform_legacy_resume(struct device *dev) |
1da177e4 | 1012 | { |
783ea7d4 MD |
1013 | struct platform_driver *pdrv = to_platform_driver(dev->driver); |
1014 | struct platform_device *pdev = to_platform_device(dev); | |
1da177e4 LT |
1015 | int ret = 0; |
1016 | ||
783ea7d4 MD |
1017 | if (dev->driver && pdrv->resume) |
1018 | ret = pdrv->resume(pdev); | |
9480e307 | 1019 | |
1da177e4 LT |
1020 | return ret; |
1021 | } | |
1022 | ||
69c9dd1e | 1023 | #endif /* CONFIG_PM_SLEEP */ |
9d730229 | 1024 | |
25e18499 RW |
1025 | #ifdef CONFIG_SUSPEND |
1026 | ||
69c9dd1e | 1027 | int platform_pm_suspend(struct device *dev) |
25e18499 RW |
1028 | { |
1029 | struct device_driver *drv = dev->driver; | |
1030 | int ret = 0; | |
1031 | ||
adf09493 RW |
1032 | if (!drv) |
1033 | return 0; | |
1034 | ||
1035 | if (drv->pm) { | |
25e18499 RW |
1036 | if (drv->pm->suspend) |
1037 | ret = drv->pm->suspend(dev); | |
1038 | } else { | |
1039 | ret = platform_legacy_suspend(dev, PMSG_SUSPEND); | |
1040 | } | |
1041 | ||
1042 | return ret; | |
1043 | } | |
1044 | ||
69c9dd1e | 1045 | int platform_pm_resume(struct device *dev) |
25e18499 RW |
1046 | { |
1047 | struct device_driver *drv = dev->driver; | |
1048 | int ret = 0; | |
1049 | ||
adf09493 RW |
1050 | if (!drv) |
1051 | return 0; | |
1052 | ||
1053 | if (drv->pm) { | |
25e18499 RW |
1054 | if (drv->pm->resume) |
1055 | ret = drv->pm->resume(dev); | |
1056 | } else { | |
1057 | ret = platform_legacy_resume(dev); | |
1058 | } | |
1059 | ||
1060 | return ret; | |
1061 | } | |
1062 | ||
69c9dd1e | 1063 | #endif /* CONFIG_SUSPEND */ |
25e18499 | 1064 | |
1f112cee | 1065 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
25e18499 | 1066 | |
69c9dd1e | 1067 | int platform_pm_freeze(struct device *dev) |
25e18499 RW |
1068 | { |
1069 | struct device_driver *drv = dev->driver; | |
1070 | int ret = 0; | |
1071 | ||
1072 | if (!drv) | |
1073 | return 0; | |
1074 | ||
1075 | if (drv->pm) { | |
1076 | if (drv->pm->freeze) | |
1077 | ret = drv->pm->freeze(dev); | |
1078 | } else { | |
1079 | ret = platform_legacy_suspend(dev, PMSG_FREEZE); | |
1080 | } | |
1081 | ||
1082 | return ret; | |
1083 | } | |
1084 | ||
69c9dd1e | 1085 | int platform_pm_thaw(struct device *dev) |
25e18499 RW |
1086 | { |
1087 | struct device_driver *drv = dev->driver; | |
1088 | int ret = 0; | |
1089 | ||
adf09493 RW |
1090 | if (!drv) |
1091 | return 0; | |
1092 | ||
1093 | if (drv->pm) { | |
25e18499 RW |
1094 | if (drv->pm->thaw) |
1095 | ret = drv->pm->thaw(dev); | |
1096 | } else { | |
1097 | ret = platform_legacy_resume(dev); | |
1098 | } | |
1099 | ||
1100 | return ret; | |
1101 | } | |
1102 | ||
69c9dd1e | 1103 | int platform_pm_poweroff(struct device *dev) |
25e18499 RW |
1104 | { |
1105 | struct device_driver *drv = dev->driver; | |
1106 | int ret = 0; | |
1107 | ||
adf09493 RW |
1108 | if (!drv) |
1109 | return 0; | |
1110 | ||
1111 | if (drv->pm) { | |
25e18499 RW |
1112 | if (drv->pm->poweroff) |
1113 | ret = drv->pm->poweroff(dev); | |
1114 | } else { | |
1115 | ret = platform_legacy_suspend(dev, PMSG_HIBERNATE); | |
1116 | } | |
1117 | ||
1118 | return ret; | |
1119 | } | |
1120 | ||
69c9dd1e | 1121 | int platform_pm_restore(struct device *dev) |
25e18499 RW |
1122 | { |
1123 | struct device_driver *drv = dev->driver; | |
1124 | int ret = 0; | |
1125 | ||
adf09493 RW |
1126 | if (!drv) |
1127 | return 0; | |
1128 | ||
1129 | if (drv->pm) { | |
25e18499 RW |
1130 | if (drv->pm->restore) |
1131 | ret = drv->pm->restore(dev); | |
1132 | } else { | |
1133 | ret = platform_legacy_resume(dev); | |
1134 | } | |
1135 | ||
1136 | return ret; | |
1137 | } | |
1138 | ||
69c9dd1e | 1139 | #endif /* CONFIG_HIBERNATE_CALLBACKS */ |
25e18499 | 1140 | |
d9ab7716 | 1141 | static const struct dev_pm_ops platform_dev_pm_ops = { |
8b313a38 RW |
1142 | .runtime_suspend = pm_generic_runtime_suspend, |
1143 | .runtime_resume = pm_generic_runtime_resume, | |
69c9dd1e | 1144 | USE_PLATFORM_PM_SLEEP_OPS |
25e18499 RW |
1145 | }; |
1146 | ||
1da177e4 LT |
1147 | struct bus_type platform_bus_type = { |
1148 | .name = "platform", | |
d06262e5 | 1149 | .dev_groups = platform_dev_groups, |
1da177e4 | 1150 | .match = platform_match, |
a0245f7a | 1151 | .uevent = platform_uevent, |
9d730229 | 1152 | .pm = &platform_dev_pm_ops, |
1da177e4 | 1153 | }; |
a96b2042 | 1154 | EXPORT_SYMBOL_GPL(platform_bus_type); |
1da177e4 LT |
1155 | |
1156 | int __init platform_bus_init(void) | |
1157 | { | |
fbfb1445 CH |
1158 | int error; |
1159 | ||
13977091 MD |
1160 | early_platform_cleanup(); |
1161 | ||
fbfb1445 CH |
1162 | error = device_register(&platform_bus); |
1163 | if (error) | |
1164 | return error; | |
1165 | error = bus_register(&platform_bus_type); | |
1166 | if (error) | |
1167 | device_unregister(&platform_bus); | |
801d728c | 1168 | of_platform_register_reconfig_notifier(); |
fbfb1445 | 1169 | return error; |
1da177e4 LT |
1170 | } |
1171 | ||
1172 | #ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK | |
1173 | u64 dma_get_required_mask(struct device *dev) | |
1174 | { | |
1175 | u32 low_totalram = ((max_pfn - 1) << PAGE_SHIFT); | |
1176 | u32 high_totalram = ((max_pfn - 1) >> (32 - PAGE_SHIFT)); | |
1177 | u64 mask; | |
1178 | ||
1179 | if (!high_totalram) { | |
1180 | /* convert to mask just covering totalram */ | |
1181 | low_totalram = (1 << (fls(low_totalram) - 1)); | |
1182 | low_totalram += low_totalram - 1; | |
1183 | mask = low_totalram; | |
1184 | } else { | |
1185 | high_totalram = (1 << (fls(high_totalram) - 1)); | |
1186 | high_totalram += high_totalram - 1; | |
1187 | mask = (((u64)high_totalram) << 32) + 0xffffffff; | |
1188 | } | |
e88a0c2c | 1189 | return mask; |
1da177e4 LT |
1190 | } |
1191 | EXPORT_SYMBOL_GPL(dma_get_required_mask); | |
1192 | #endif | |
13977091 MD |
1193 | |
1194 | static __initdata LIST_HEAD(early_platform_driver_list); | |
1195 | static __initdata LIST_HEAD(early_platform_device_list); | |
1196 | ||
1197 | /** | |
4d26e139 | 1198 | * early_platform_driver_register - register early platform driver |
d86c1302 | 1199 | * @epdrv: early_platform driver structure |
13977091 | 1200 | * @buf: string passed from early_param() |
4d26e139 MD |
1201 | * |
1202 | * Helper function for early_platform_init() / early_platform_init_buffer() | |
13977091 MD |
1203 | */ |
1204 | int __init early_platform_driver_register(struct early_platform_driver *epdrv, | |
1205 | char *buf) | |
1206 | { | |
c60e0504 | 1207 | char *tmp; |
13977091 MD |
1208 | int n; |
1209 | ||
1210 | /* Simply add the driver to the end of the global list. | |
1211 | * Drivers will by default be put on the list in compiled-in order. | |
1212 | */ | |
1213 | if (!epdrv->list.next) { | |
1214 | INIT_LIST_HEAD(&epdrv->list); | |
1215 | list_add_tail(&epdrv->list, &early_platform_driver_list); | |
1216 | } | |
1217 | ||
1218 | /* If the user has specified device then make sure the driver | |
1219 | * gets prioritized. The driver of the last device specified on | |
1220 | * command line will be put first on the list. | |
1221 | */ | |
1222 | n = strlen(epdrv->pdrv->driver.name); | |
1223 | if (buf && !strncmp(buf, epdrv->pdrv->driver.name, n)) { | |
1224 | list_move(&epdrv->list, &early_platform_driver_list); | |
1225 | ||
c60e0504 MD |
1226 | /* Allow passing parameters after device name */ |
1227 | if (buf[n] == '\0' || buf[n] == ',') | |
13977091 | 1228 | epdrv->requested_id = -1; |
c60e0504 MD |
1229 | else { |
1230 | epdrv->requested_id = simple_strtoul(&buf[n + 1], | |
1231 | &tmp, 10); | |
1232 | ||
1233 | if (buf[n] != '.' || (tmp == &buf[n + 1])) { | |
1234 | epdrv->requested_id = EARLY_PLATFORM_ID_ERROR; | |
1235 | n = 0; | |
1236 | } else | |
1237 | n += strcspn(&buf[n + 1], ",") + 1; | |
1238 | } | |
1239 | ||
1240 | if (buf[n] == ',') | |
1241 | n++; | |
1242 | ||
1243 | if (epdrv->bufsize) { | |
1244 | memcpy(epdrv->buffer, &buf[n], | |
1245 | min_t(int, epdrv->bufsize, strlen(&buf[n]) + 1)); | |
1246 | epdrv->buffer[epdrv->bufsize - 1] = '\0'; | |
1247 | } | |
13977091 MD |
1248 | } |
1249 | ||
1250 | return 0; | |
1251 | } | |
1252 | ||
1253 | /** | |
4d26e139 | 1254 | * early_platform_add_devices - adds a number of early platform devices |
13977091 MD |
1255 | * @devs: array of early platform devices to add |
1256 | * @num: number of early platform devices in array | |
4d26e139 MD |
1257 | * |
1258 | * Used by early architecture code to register early platform devices and | |
1259 | * their platform data. | |
13977091 MD |
1260 | */ |
1261 | void __init early_platform_add_devices(struct platform_device **devs, int num) | |
1262 | { | |
1263 | struct device *dev; | |
1264 | int i; | |
1265 | ||
1266 | /* simply add the devices to list */ | |
1267 | for (i = 0; i < num; i++) { | |
1268 | dev = &devs[i]->dev; | |
1269 | ||
1270 | if (!dev->devres_head.next) { | |
bed2b42d | 1271 | pm_runtime_early_init(dev); |
13977091 MD |
1272 | INIT_LIST_HEAD(&dev->devres_head); |
1273 | list_add_tail(&dev->devres_head, | |
1274 | &early_platform_device_list); | |
1275 | } | |
1276 | } | |
1277 | } | |
1278 | ||
1279 | /** | |
4d26e139 | 1280 | * early_platform_driver_register_all - register early platform drivers |
13977091 | 1281 | * @class_str: string to identify early platform driver class |
4d26e139 MD |
1282 | * |
1283 | * Used by architecture code to register all early platform drivers | |
1284 | * for a certain class. If omitted then only early platform drivers | |
1285 | * with matching kernel command line class parameters will be registered. | |
13977091 MD |
1286 | */ |
1287 | void __init early_platform_driver_register_all(char *class_str) | |
1288 | { | |
1289 | /* The "class_str" parameter may or may not be present on the kernel | |
1290 | * command line. If it is present then there may be more than one | |
1291 | * matching parameter. | |
1292 | * | |
1293 | * Since we register our early platform drivers using early_param() | |
1294 | * we need to make sure that they also get registered in the case | |
1295 | * when the parameter is missing from the kernel command line. | |
1296 | * | |
1297 | * We use parse_early_options() to make sure the early_param() gets | |
1298 | * called at least once. The early_param() may be called more than | |
1299 | * once since the name of the preferred device may be specified on | |
1300 | * the kernel command line. early_platform_driver_register() handles | |
1301 | * this case for us. | |
1302 | */ | |
1303 | parse_early_options(class_str); | |
1304 | } | |
1305 | ||
1306 | /** | |
4d26e139 | 1307 | * early_platform_match - find early platform device matching driver |
d86c1302 | 1308 | * @epdrv: early platform driver structure |
13977091 MD |
1309 | * @id: id to match against |
1310 | */ | |
a8257910 | 1311 | static struct platform_device * __init |
13977091 MD |
1312 | early_platform_match(struct early_platform_driver *epdrv, int id) |
1313 | { | |
1314 | struct platform_device *pd; | |
1315 | ||
1316 | list_for_each_entry(pd, &early_platform_device_list, dev.devres_head) | |
1317 | if (platform_match(&pd->dev, &epdrv->pdrv->driver)) | |
1318 | if (pd->id == id) | |
1319 | return pd; | |
1320 | ||
1321 | return NULL; | |
1322 | } | |
1323 | ||
1324 | /** | |
4d26e139 | 1325 | * early_platform_left - check if early platform driver has matching devices |
d86c1302 | 1326 | * @epdrv: early platform driver structure |
13977091 MD |
1327 | * @id: return true if id or above exists |
1328 | */ | |
a8257910 | 1329 | static int __init early_platform_left(struct early_platform_driver *epdrv, |
13977091 MD |
1330 | int id) |
1331 | { | |
1332 | struct platform_device *pd; | |
1333 | ||
1334 | list_for_each_entry(pd, &early_platform_device_list, dev.devres_head) | |
1335 | if (platform_match(&pd->dev, &epdrv->pdrv->driver)) | |
1336 | if (pd->id >= id) | |
1337 | return 1; | |
1338 | ||
1339 | return 0; | |
1340 | } | |
1341 | ||
1342 | /** | |
4d26e139 | 1343 | * early_platform_driver_probe_id - probe drivers matching class_str and id |
13977091 MD |
1344 | * @class_str: string to identify early platform driver class |
1345 | * @id: id to match against | |
1346 | * @nr_probe: number of platform devices to successfully probe before exiting | |
1347 | */ | |
1348 | static int __init early_platform_driver_probe_id(char *class_str, | |
1349 | int id, | |
1350 | int nr_probe) | |
1351 | { | |
1352 | struct early_platform_driver *epdrv; | |
1353 | struct platform_device *match; | |
1354 | int match_id; | |
1355 | int n = 0; | |
1356 | int left = 0; | |
1357 | ||
1358 | list_for_each_entry(epdrv, &early_platform_driver_list, list) { | |
1359 | /* only use drivers matching our class_str */ | |
1360 | if (strcmp(class_str, epdrv->class_str)) | |
1361 | continue; | |
1362 | ||
1363 | if (id == -2) { | |
1364 | match_id = epdrv->requested_id; | |
1365 | left = 1; | |
1366 | ||
1367 | } else { | |
1368 | match_id = id; | |
1369 | left += early_platform_left(epdrv, id); | |
1370 | ||
1371 | /* skip requested id */ | |
1372 | switch (epdrv->requested_id) { | |
1373 | case EARLY_PLATFORM_ID_ERROR: | |
1374 | case EARLY_PLATFORM_ID_UNSET: | |
1375 | break; | |
1376 | default: | |
1377 | if (epdrv->requested_id == id) | |
1378 | match_id = EARLY_PLATFORM_ID_UNSET; | |
1379 | } | |
1380 | } | |
1381 | ||
1382 | switch (match_id) { | |
1383 | case EARLY_PLATFORM_ID_ERROR: | |
0258e182 FP |
1384 | pr_warn("%s: unable to parse %s parameter\n", |
1385 | class_str, epdrv->pdrv->driver.name); | |
13977091 MD |
1386 | /* fall-through */ |
1387 | case EARLY_PLATFORM_ID_UNSET: | |
1388 | match = NULL; | |
1389 | break; | |
1390 | default: | |
1391 | match = early_platform_match(epdrv, match_id); | |
1392 | } | |
1393 | ||
1394 | if (match) { | |
a636ee7f PM |
1395 | /* |
1396 | * Set up a sensible init_name to enable | |
1397 | * dev_name() and others to be used before the | |
1398 | * rest of the driver core is initialized. | |
1399 | */ | |
06fe53be | 1400 | if (!match->dev.init_name && slab_is_available()) { |
a636ee7f | 1401 | if (match->id != -1) |
bd05086b PM |
1402 | match->dev.init_name = |
1403 | kasprintf(GFP_KERNEL, "%s.%d", | |
1404 | match->name, | |
1405 | match->id); | |
a636ee7f | 1406 | else |
bd05086b PM |
1407 | match->dev.init_name = |
1408 | kasprintf(GFP_KERNEL, "%s", | |
1409 | match->name); | |
a636ee7f | 1410 | |
a636ee7f PM |
1411 | if (!match->dev.init_name) |
1412 | return -ENOMEM; | |
1413 | } | |
bd05086b | 1414 | |
13977091 | 1415 | if (epdrv->pdrv->probe(match)) |
0258e182 FP |
1416 | pr_warn("%s: unable to probe %s early.\n", |
1417 | class_str, match->name); | |
13977091 MD |
1418 | else |
1419 | n++; | |
1420 | } | |
1421 | ||
1422 | if (n >= nr_probe) | |
1423 | break; | |
1424 | } | |
1425 | ||
1426 | if (left) | |
1427 | return n; | |
1428 | else | |
1429 | return -ENODEV; | |
1430 | } | |
1431 | ||
1432 | /** | |
4d26e139 | 1433 | * early_platform_driver_probe - probe a class of registered drivers |
13977091 MD |
1434 | * @class_str: string to identify early platform driver class |
1435 | * @nr_probe: number of platform devices to successfully probe before exiting | |
1436 | * @user_only: only probe user specified early platform devices | |
4d26e139 MD |
1437 | * |
1438 | * Used by architecture code to probe registered early platform drivers | |
1439 | * within a certain class. For probe to happen a registered early platform | |
1440 | * device matching a registered early platform driver is needed. | |
13977091 MD |
1441 | */ |
1442 | int __init early_platform_driver_probe(char *class_str, | |
1443 | int nr_probe, | |
1444 | int user_only) | |
1445 | { | |
1446 | int k, n, i; | |
1447 | ||
1448 | n = 0; | |
1449 | for (i = -2; n < nr_probe; i++) { | |
1450 | k = early_platform_driver_probe_id(class_str, i, nr_probe - n); | |
1451 | ||
1452 | if (k < 0) | |
1453 | break; | |
1454 | ||
1455 | n += k; | |
1456 | ||
1457 | if (user_only) | |
1458 | break; | |
1459 | } | |
1460 | ||
1461 | return n; | |
1462 | } | |
1463 | ||
1464 | /** | |
1465 | * early_platform_cleanup - clean up early platform code | |
1466 | */ | |
1467 | void __init early_platform_cleanup(void) | |
1468 | { | |
1469 | struct platform_device *pd, *pd2; | |
1470 | ||
1471 | /* clean up the devres list used to chain devices */ | |
1472 | list_for_each_entry_safe(pd, pd2, &early_platform_device_list, | |
1473 | dev.devres_head) { | |
1474 | list_del(&pd->dev.devres_head); | |
1475 | memset(&pd->dev.devres_head, 0, sizeof(pd->dev.devres_head)); | |
1476 | } | |
1477 | } | |
1478 |