diff options
Diffstat (limited to 'drivers/base/platform.c')
-rw-r--r-- | drivers/base/platform.c | 233 |
1 files changed, 117 insertions, 116 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 48d5db4f92ee..efaf282c438c 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c | |||
@@ -20,7 +20,8 @@ | |||
20 | 20 | ||
21 | #include "base.h" | 21 | #include "base.h" |
22 | 22 | ||
23 | #define to_platform_driver(drv) (container_of((drv), struct platform_driver, driver)) | 23 | #define to_platform_driver(drv) (container_of((drv), struct platform_driver, \ |
24 | driver)) | ||
24 | 25 | ||
25 | struct device platform_bus = { | 26 | struct device platform_bus = { |
26 | .bus_id = "platform", | 27 | .bus_id = "platform", |
@@ -28,14 +29,13 @@ struct device platform_bus = { | |||
28 | EXPORT_SYMBOL_GPL(platform_bus); | 29 | EXPORT_SYMBOL_GPL(platform_bus); |
29 | 30 | ||
30 | /** | 31 | /** |
31 | * platform_get_resource - get a resource for a device | 32 | * platform_get_resource - get a resource for a device |
32 | * @dev: platform device | 33 | * @dev: platform device |
33 | * @type: resource type | 34 | * @type: resource type |
34 | * @num: resource index | 35 | * @num: resource index |
35 | */ | 36 | */ |
36 | struct resource * | 37 | struct resource *platform_get_resource(struct platform_device *dev, |
37 | platform_get_resource(struct platform_device *dev, unsigned int type, | 38 | unsigned int type, unsigned int num) |
38 | unsigned int num) | ||
39 | { | 39 | { |
40 | int i; | 40 | int i; |
41 | 41 | ||
@@ -43,8 +43,7 @@ platform_get_resource(struct platform_device *dev, unsigned int type, | |||
43 | struct resource *r = &dev->resource[i]; | 43 | struct resource *r = &dev->resource[i]; |
44 | 44 | ||
45 | if ((r->flags & (IORESOURCE_IO|IORESOURCE_MEM| | 45 | if ((r->flags & (IORESOURCE_IO|IORESOURCE_MEM| |
46 | IORESOURCE_IRQ|IORESOURCE_DMA)) | 46 | IORESOURCE_IRQ|IORESOURCE_DMA)) == type) |
47 | == type) | ||
48 | if (num-- == 0) | 47 | if (num-- == 0) |
49 | return r; | 48 | return r; |
50 | } | 49 | } |
@@ -53,9 +52,9 @@ platform_get_resource(struct platform_device *dev, unsigned int type, | |||
53 | EXPORT_SYMBOL_GPL(platform_get_resource); | 52 | EXPORT_SYMBOL_GPL(platform_get_resource); |
54 | 53 | ||
55 | /** | 54 | /** |
56 | * platform_get_irq - get an IRQ for a device | 55 | * platform_get_irq - get an IRQ for a device |
57 | * @dev: platform device | 56 | * @dev: platform device |
58 | * @num: IRQ number index | 57 | * @num: IRQ number index |
59 | */ | 58 | */ |
60 | int platform_get_irq(struct platform_device *dev, unsigned int num) | 59 | int platform_get_irq(struct platform_device *dev, unsigned int num) |
61 | { | 60 | { |
@@ -66,14 +65,13 @@ int platform_get_irq(struct platform_device *dev, unsigned int num) | |||
66 | EXPORT_SYMBOL_GPL(platform_get_irq); | 65 | EXPORT_SYMBOL_GPL(platform_get_irq); |
67 | 66 | ||
68 | /** | 67 | /** |
69 | * platform_get_resource_byname - get a resource for a device by name | 68 | * platform_get_resource_byname - get a resource for a device by name |
70 | * @dev: platform device | 69 | * @dev: platform device |
71 | * @type: resource type | 70 | * @type: resource type |
72 | * @name: resource name | 71 | * @name: resource name |
73 | */ | 72 | */ |
74 | struct resource * | 73 | struct resource *platform_get_resource_byname(struct platform_device *dev, |
75 | platform_get_resource_byname(struct platform_device *dev, unsigned int type, | 74 | unsigned int type, char *name) |
76 | char *name) | ||
77 | { | 75 | { |
78 | int i; | 76 | int i; |
79 | 77 | ||
@@ -90,22 +88,23 @@ platform_get_resource_byname(struct platform_device *dev, unsigned int type, | |||
90 | EXPORT_SYMBOL_GPL(platform_get_resource_byname); | 88 | EXPORT_SYMBOL_GPL(platform_get_resource_byname); |
91 | 89 | ||
92 | /** | 90 | /** |
93 | * platform_get_irq - get an IRQ for a device | 91 | * platform_get_irq - get an IRQ for a device |
94 | * @dev: platform device | 92 | * @dev: platform device |
95 | * @name: IRQ name | 93 | * @name: IRQ name |
96 | */ | 94 | */ |
97 | int platform_get_irq_byname(struct platform_device *dev, char *name) | 95 | int platform_get_irq_byname(struct platform_device *dev, char *name) |
98 | { | 96 | { |
99 | struct resource *r = platform_get_resource_byname(dev, IORESOURCE_IRQ, name); | 97 | struct resource *r = platform_get_resource_byname(dev, IORESOURCE_IRQ, |
98 | name); | ||
100 | 99 | ||
101 | return r ? r->start : -ENXIO; | 100 | return r ? r->start : -ENXIO; |
102 | } | 101 | } |
103 | EXPORT_SYMBOL_GPL(platform_get_irq_byname); | 102 | EXPORT_SYMBOL_GPL(platform_get_irq_byname); |
104 | 103 | ||
105 | /** | 104 | /** |
106 | * platform_add_devices - add a numbers of platform devices | 105 | * platform_add_devices - add a numbers of platform devices |
107 | * @devs: array of platform devices to add | 106 | * @devs: array of platform devices to add |
108 | * @num: number of platform devices in array | 107 | * @num: number of platform devices in array |
109 | */ | 108 | */ |
110 | int platform_add_devices(struct platform_device **devs, int num) | 109 | int platform_add_devices(struct platform_device **devs, int num) |
111 | { | 110 | { |
@@ -130,12 +129,11 @@ struct platform_object { | |||
130 | }; | 129 | }; |
131 | 130 | ||
132 | /** | 131 | /** |
133 | * platform_device_put | 132 | * platform_device_put |
134 | * @pdev: platform device to free | 133 | * @pdev: platform device to free |
135 | * | 134 | * |
136 | * Free all memory associated with a platform device. This function | 135 | * Free all memory associated with a platform device. This function must |
137 | * must _only_ be externally called in error cases. All other usage | 136 | * _only_ be externally called in error cases. All other usage is a bug. |
138 | * is a bug. | ||
139 | */ | 137 | */ |
140 | void platform_device_put(struct platform_device *pdev) | 138 | void platform_device_put(struct platform_device *pdev) |
141 | { | 139 | { |
@@ -146,7 +144,8 @@ EXPORT_SYMBOL_GPL(platform_device_put); | |||
146 | 144 | ||
147 | static void platform_device_release(struct device *dev) | 145 | static void platform_device_release(struct device *dev) |
148 | { | 146 | { |
149 | struct platform_object *pa = container_of(dev, struct platform_object, pdev.dev); | 147 | struct platform_object *pa = container_of(dev, struct platform_object, |
148 | pdev.dev); | ||
150 | 149 | ||
151 | kfree(pa->pdev.dev.platform_data); | 150 | kfree(pa->pdev.dev.platform_data); |
152 | kfree(pa->pdev.resource); | 151 | kfree(pa->pdev.resource); |
@@ -154,12 +153,12 @@ static void platform_device_release(struct device *dev) | |||
154 | } | 153 | } |
155 | 154 | ||
156 | /** | 155 | /** |
157 | * platform_device_alloc | 156 | * platform_device_alloc |
158 | * @name: base name of the device we're adding | 157 | * @name: base name of the device we're adding |
159 | * @id: instance id | 158 | * @id: instance id |
160 | * | 159 | * |
161 | * Create a platform device object which can have other objects attached | 160 | * Create a platform device object which can have other objects attached |
162 | * to it, and which will have attached objects freed when it is released. | 161 | * to it, and which will have attached objects freed when it is released. |
163 | */ | 162 | */ |
164 | struct platform_device *platform_device_alloc(const char *name, int id) | 163 | struct platform_device *platform_device_alloc(const char *name, int id) |
165 | { | 164 | { |
@@ -179,16 +178,17 @@ struct platform_device *platform_device_alloc(const char *name, int id) | |||
179 | EXPORT_SYMBOL_GPL(platform_device_alloc); | 178 | EXPORT_SYMBOL_GPL(platform_device_alloc); |
180 | 179 | ||
181 | /** | 180 | /** |
182 | * platform_device_add_resources | 181 | * platform_device_add_resources |
183 | * @pdev: platform device allocated by platform_device_alloc to add resources to | 182 | * @pdev: platform device allocated by platform_device_alloc to add resources to |
184 | * @res: set of resources that needs to be allocated for the device | 183 | * @res: set of resources that needs to be allocated for the device |
185 | * @num: number of resources | 184 | * @num: number of resources |
186 | * | 185 | * |
187 | * Add a copy of the resources to the platform device. The memory | 186 | * Add a copy of the resources to the platform device. The memory |
188 | * associated with the resources will be freed when the platform | 187 | * associated with the resources will be freed when the platform device is |
189 | * device is released. | 188 | * released. |
190 | */ | 189 | */ |
191 | int platform_device_add_resources(struct platform_device *pdev, struct resource *res, unsigned int num) | 190 | int platform_device_add_resources(struct platform_device *pdev, |
191 | struct resource *res, unsigned int num) | ||
192 | { | 192 | { |
193 | struct resource *r; | 193 | struct resource *r; |
194 | 194 | ||
@@ -203,16 +203,17 @@ int platform_device_add_resources(struct platform_device *pdev, struct resource | |||
203 | EXPORT_SYMBOL_GPL(platform_device_add_resources); | 203 | EXPORT_SYMBOL_GPL(platform_device_add_resources); |
204 | 204 | ||
205 | /** | 205 | /** |
206 | * platform_device_add_data | 206 | * platform_device_add_data |
207 | * @pdev: platform device allocated by platform_device_alloc to add resources to | 207 | * @pdev: platform device allocated by platform_device_alloc to add resources to |
208 | * @data: platform specific data for this platform device | 208 | * @data: platform specific data for this platform device |
209 | * @size: size of platform specific data | 209 | * @size: size of platform specific data |
210 | * | 210 | * |
211 | * Add a copy of platform specific data to the platform device's platform_data | 211 | * Add a copy of platform specific data to the platform device's |
212 | * pointer. The memory associated with the platform data will be freed | 212 | * platform_data pointer. The memory associated with the platform data |
213 | * when the platform device is released. | 213 | * will be freed when the platform device is released. |
214 | */ | 214 | */ |
215 | int platform_device_add_data(struct platform_device *pdev, const void *data, size_t size) | 215 | int platform_device_add_data(struct platform_device *pdev, const void *data, |
216 | size_t size) | ||
216 | { | 217 | { |
217 | void *d; | 218 | void *d; |
218 | 219 | ||
@@ -226,11 +227,11 @@ int platform_device_add_data(struct platform_device *pdev, const void *data, siz | |||
226 | EXPORT_SYMBOL_GPL(platform_device_add_data); | 227 | EXPORT_SYMBOL_GPL(platform_device_add_data); |
227 | 228 | ||
228 | /** | 229 | /** |
229 | * platform_device_add - add a platform device to device hierarchy | 230 | * platform_device_add - add a platform device to device hierarchy |
230 | * @pdev: platform device we're adding | 231 | * @pdev: platform device we're adding |
231 | * | 232 | * |
232 | * This is part 2 of platform_device_register(), though may be called | 233 | * This is part 2 of platform_device_register(), though may be called |
233 | * separately _iff_ pdev was allocated by platform_device_alloc(). | 234 | * separately _iff_ pdev was allocated by platform_device_alloc(). |
234 | */ | 235 | */ |
235 | int platform_device_add(struct platform_device *pdev) | 236 | int platform_device_add(struct platform_device *pdev) |
236 | { | 237 | { |
@@ -289,13 +290,12 @@ int platform_device_add(struct platform_device *pdev) | |||
289 | EXPORT_SYMBOL_GPL(platform_device_add); | 290 | EXPORT_SYMBOL_GPL(platform_device_add); |
290 | 291 | ||
291 | /** | 292 | /** |
292 | * platform_device_del - remove a platform-level device | 293 | * platform_device_del - remove a platform-level device |
293 | * @pdev: platform device we're removing | 294 | * @pdev: platform device we're removing |
294 | * | 295 | * |
295 | * Note that this function will also release all memory- and port-based | 296 | * Note that this function will also release all memory- and port-based |
296 | * resources owned by the device (@dev->resource). This function | 297 | * resources owned by the device (@dev->resource). This function must |
297 | * must _only_ be externally called in error cases. All other usage | 298 | * _only_ be externally called in error cases. All other usage is a bug. |
298 | * is a bug. | ||
299 | */ | 299 | */ |
300 | void platform_device_del(struct platform_device *pdev) | 300 | void platform_device_del(struct platform_device *pdev) |
301 | { | 301 | { |
@@ -314,11 +314,10 @@ void platform_device_del(struct platform_device *pdev) | |||
314 | EXPORT_SYMBOL_GPL(platform_device_del); | 314 | EXPORT_SYMBOL_GPL(platform_device_del); |
315 | 315 | ||
316 | /** | 316 | /** |
317 | * platform_device_register - add a platform-level device | 317 | * platform_device_register - add a platform-level device |
318 | * @pdev: platform device we're adding | 318 | * @pdev: platform device we're adding |
319 | * | ||
320 | */ | 319 | */ |
321 | int platform_device_register(struct platform_device * pdev) | 320 | int platform_device_register(struct platform_device *pdev) |
322 | { | 321 | { |
323 | device_initialize(&pdev->dev); | 322 | device_initialize(&pdev->dev); |
324 | return platform_device_add(pdev); | 323 | return platform_device_add(pdev); |
@@ -326,14 +325,14 @@ int platform_device_register(struct platform_device * pdev) | |||
326 | EXPORT_SYMBOL_GPL(platform_device_register); | 325 | EXPORT_SYMBOL_GPL(platform_device_register); |
327 | 326 | ||
328 | /** | 327 | /** |
329 | * platform_device_unregister - unregister a platform-level device | 328 | * platform_device_unregister - unregister a platform-level device |
330 | * @pdev: platform device we're unregistering | 329 | * @pdev: platform device we're unregistering |
331 | * | 330 | * |
332 | * Unregistration is done in 2 steps. First we release all resources | 331 | * Unregistration is done in 2 steps. First we release all resources |
333 | * and remove it from the subsystem, then we drop reference count by | 332 | * and remove it from the subsystem, then we drop reference count by |
334 | * calling platform_device_put(). | 333 | * calling platform_device_put(). |
335 | */ | 334 | */ |
336 | void platform_device_unregister(struct platform_device * pdev) | 335 | void platform_device_unregister(struct platform_device *pdev) |
337 | { | 336 | { |
338 | platform_device_del(pdev); | 337 | platform_device_del(pdev); |
339 | platform_device_put(pdev); | 338 | platform_device_put(pdev); |
@@ -341,27 +340,29 @@ void platform_device_unregister(struct platform_device * pdev) | |||
341 | EXPORT_SYMBOL_GPL(platform_device_unregister); | 340 | EXPORT_SYMBOL_GPL(platform_device_unregister); |
342 | 341 | ||
343 | /** | 342 | /** |
344 | * platform_device_register_simple | 343 | * platform_device_register_simple |
345 | * @name: base name of the device we're adding | 344 | * @name: base name of the device we're adding |
346 | * @id: instance id | 345 | * @id: instance id |
347 | * @res: set of resources that needs to be allocated for the device | 346 | * @res: set of resources that needs to be allocated for the device |
348 | * @num: number of resources | 347 | * @num: number of resources |
349 | * | 348 | * |
350 | * This function creates a simple platform device that requires minimal | 349 | * This function creates a simple platform device that requires minimal |
351 | * resource and memory management. Canned release function freeing | 350 | * resource and memory management. Canned release function freeing memory |
352 | * memory allocated for the device allows drivers using such devices | 351 | * allocated for the device allows drivers using such devices to be |
353 | * to be unloaded without waiting for the last reference to the device | 352 | * unloaded without waiting for the last reference to the device to be |
354 | * to be dropped. | 353 | * dropped. |
355 | * | 354 | * |
356 | * This interface is primarily intended for use with legacy drivers | 355 | * This interface is primarily intended for use with legacy drivers which |
357 | * which probe hardware directly. Because such drivers create sysfs | 356 | * probe hardware directly. Because such drivers create sysfs device nodes |
358 | * device nodes themselves, rather than letting system infrastructure | 357 | * themselves, rather than letting system infrastructure handle such device |
359 | * handle such device enumeration tasks, they don't fully conform to | 358 | * enumeration tasks, they don't fully conform to the Linux driver model. |
360 | * the Linux driver model. In particular, when such drivers are built | 359 | * In particular, when such drivers are built as modules, they can't be |
361 | * as modules, they can't be "hotplugged". | 360 | * "hotplugged". |
362 | */ | 361 | */ |
363 | struct platform_device *platform_device_register_simple(const char *name, int id, | 362 | struct platform_device *platform_device_register_simple(const char *name, |
364 | struct resource *res, unsigned int num) | 363 | int id, |
364 | struct resource *res, | ||
365 | unsigned int num) | ||
365 | { | 366 | { |
366 | struct platform_device *pdev; | 367 | struct platform_device *pdev; |
367 | int retval; | 368 | int retval; |
@@ -436,8 +437,8 @@ static int platform_drv_resume(struct device *_dev) | |||
436 | } | 437 | } |
437 | 438 | ||
438 | /** | 439 | /** |
439 | * platform_driver_register | 440 | * platform_driver_register |
440 | * @drv: platform driver structure | 441 | * @drv: platform driver structure |
441 | */ | 442 | */ |
442 | int platform_driver_register(struct platform_driver *drv) | 443 | int platform_driver_register(struct platform_driver *drv) |
443 | { | 444 | { |
@@ -457,8 +458,8 @@ int platform_driver_register(struct platform_driver *drv) | |||
457 | EXPORT_SYMBOL_GPL(platform_driver_register); | 458 | EXPORT_SYMBOL_GPL(platform_driver_register); |
458 | 459 | ||
459 | /** | 460 | /** |
460 | * platform_driver_unregister | 461 | * platform_driver_unregister |
461 | * @drv: platform driver structure | 462 | * @drv: platform driver structure |
462 | */ | 463 | */ |
463 | void platform_driver_unregister(struct platform_driver *drv) | 464 | void platform_driver_unregister(struct platform_driver *drv) |
464 | { | 465 | { |
@@ -516,8 +517,8 @@ EXPORT_SYMBOL_GPL(platform_driver_probe); | |||
516 | * (b) sysfs attribute lets new-style coldplug recover from hotplug events | 517 | * (b) sysfs attribute lets new-style coldplug recover from hotplug events |
517 | * mishandled before system is fully running: "modprobe $(cat modalias)" | 518 | * mishandled before system is fully running: "modprobe $(cat modalias)" |
518 | */ | 519 | */ |
519 | static ssize_t | 520 | static ssize_t modalias_show(struct device *dev, struct device_attribute *a, |
520 | modalias_show(struct device *dev, struct device_attribute *a, char *buf) | 521 | char *buf) |
521 | { | 522 | { |
522 | struct platform_device *pdev = to_platform_device(dev); | 523 | struct platform_device *pdev = to_platform_device(dev); |
523 | int len = snprintf(buf, PAGE_SIZE, "platform:%s\n", pdev->name); | 524 | int len = snprintf(buf, PAGE_SIZE, "platform:%s\n", pdev->name); |
@@ -538,26 +539,24 @@ static int platform_uevent(struct device *dev, struct kobj_uevent_env *env) | |||
538 | return 0; | 539 | return 0; |
539 | } | 540 | } |
540 | 541 | ||
541 | |||
542 | /** | 542 | /** |
543 | * platform_match - bind platform device to platform driver. | 543 | * platform_match - bind platform device to platform driver. |
544 | * @dev: device. | 544 | * @dev: device. |
545 | * @drv: driver. | 545 | * @drv: driver. |
546 | * | 546 | * |
547 | * Platform device IDs are assumed to be encoded like this: | 547 | * Platform device IDs are assumed to be encoded like this: |
548 | * "<name><instance>", where <name> is a short description of the | 548 | * "<name><instance>", where <name> is a short description of the type of |
549 | * type of device, like "pci" or "floppy", and <instance> is the | 549 | * device, like "pci" or "floppy", and <instance> is the enumerated |
550 | * enumerated instance of the device, like '0' or '42'. | 550 | * instance of the device, like '0' or '42'. Driver IDs are simply |
551 | * Driver IDs are simply "<name>". | 551 | * "<name>". So, extract the <name> from the platform_device structure, |
552 | * So, extract the <name> from the platform_device structure, | 552 | * and compare it against the name of the driver. Return whether they match |
553 | * and compare it against the name of the driver. Return whether | 553 | * or not. |
554 | * they match or not. | ||
555 | */ | 554 | */ |
556 | 555 | static int platform_match(struct device *dev, struct device_driver *drv) | |
557 | static int platform_match(struct device * dev, struct device_driver * drv) | ||
558 | { | 556 | { |
559 | struct platform_device *pdev = container_of(dev, struct platform_device, dev); | 557 | struct platform_device *pdev; |
560 | 558 | ||
559 | pdev = container_of(dev, struct platform_device, dev); | ||
561 | return (strncmp(pdev->name, drv->name, BUS_ID_SIZE) == 0); | 560 | return (strncmp(pdev->name, drv->name, BUS_ID_SIZE) == 0); |
562 | } | 561 | } |
563 | 562 | ||
@@ -574,9 +573,10 @@ static int platform_suspend(struct device *dev, pm_message_t mesg) | |||
574 | static int platform_suspend_late(struct device *dev, pm_message_t mesg) | 573 | static int platform_suspend_late(struct device *dev, pm_message_t mesg) |
575 | { | 574 | { |
576 | struct platform_driver *drv = to_platform_driver(dev->driver); | 575 | struct platform_driver *drv = to_platform_driver(dev->driver); |
577 | struct platform_device *pdev = container_of(dev, struct platform_device, dev); | 576 | struct platform_device *pdev; |
578 | int ret = 0; | 577 | int ret = 0; |
579 | 578 | ||
579 | pdev = container_of(dev, struct platform_device, dev); | ||
580 | if (dev->driver && drv->suspend_late) | 580 | if (dev->driver && drv->suspend_late) |
581 | ret = drv->suspend_late(pdev, mesg); | 581 | ret = drv->suspend_late(pdev, mesg); |
582 | 582 | ||
@@ -586,16 +586,17 @@ static int platform_suspend_late(struct device *dev, pm_message_t mesg) | |||
586 | static int platform_resume_early(struct device *dev) | 586 | static int platform_resume_early(struct device *dev) |
587 | { | 587 | { |
588 | struct platform_driver *drv = to_platform_driver(dev->driver); | 588 | struct platform_driver *drv = to_platform_driver(dev->driver); |
589 | struct platform_device *pdev = container_of(dev, struct platform_device, dev); | 589 | struct platform_device *pdev; |
590 | int ret = 0; | 590 | int ret = 0; |
591 | 591 | ||
592 | pdev = container_of(dev, struct platform_device, dev); | ||
592 | if (dev->driver && drv->resume_early) | 593 | if (dev->driver && drv->resume_early) |
593 | ret = drv->resume_early(pdev); | 594 | ret = drv->resume_early(pdev); |
594 | 595 | ||
595 | return ret; | 596 | return ret; |
596 | } | 597 | } |
597 | 598 | ||
598 | static int platform_resume(struct device * dev) | 599 | static int platform_resume(struct device *dev) |
599 | { | 600 | { |
600 | int ret = 0; | 601 | int ret = 0; |
601 | 602 | ||