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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2005-11-09 12:23:39 -0500
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-11-09 12:23:39 -0500
commit00d3dcdd96646be6059cc21f2efa94c4edc1eda5 (patch)
tree0e45a3e4cb62bbd45e6a9a117a78bd911f346dbe /drivers/base/platform.c
parent330d57fb98a916fa8e1363846540dd420e99499a (diff)
[DRIVER MODEL] Add platform_driver
Introduce struct platform_driver. This allows the platform device driver methods to be passed a platform_device structure instead of instead of a plain device structure, and therefore requiring casting in every platform driver. We introduce this in such a way that any existing platform drivers registered directly via driver_register continue to work as before, thereby allowing a gradual conversion to the new platform_driver methods. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base/platform.c')
-rw-r--r--drivers/base/platform.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 6d4736e89f1a..8827dafba945 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -20,6 +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))
24
23struct device platform_bus = { 25struct device platform_bus = {
24 .bus_id = "platform", 26 .bus_id = "platform",
25}; 27};
@@ -354,6 +356,77 @@ error:
354 return ERR_PTR(retval); 356 return ERR_PTR(retval);
355} 357}
356 358
359static int platform_drv_probe(struct device *_dev)
360{
361 struct platform_driver *drv = to_platform_driver(_dev->driver);
362 struct platform_device *dev = to_platform_device(_dev);
363
364 return drv->probe(dev);
365}
366
367static int platform_drv_remove(struct device *_dev)
368{
369 struct platform_driver *drv = to_platform_driver(_dev->driver);
370 struct platform_device *dev = to_platform_device(_dev);
371
372 return drv->remove(dev);
373}
374
375static void platform_drv_shutdown(struct device *_dev)
376{
377 struct platform_driver *drv = to_platform_driver(_dev->driver);
378 struct platform_device *dev = to_platform_device(_dev);
379
380 drv->shutdown(dev);
381}
382
383static int platform_drv_suspend(struct device *_dev, pm_message_t state)
384{
385 struct platform_driver *drv = to_platform_driver(_dev->driver);
386 struct platform_device *dev = to_platform_device(_dev);
387
388 return drv->suspend(dev, state);
389}
390
391static int platform_drv_resume(struct device *_dev)
392{
393 struct platform_driver *drv = to_platform_driver(_dev->driver);
394 struct platform_device *dev = to_platform_device(_dev);
395
396 return drv->resume(dev);
397}
398
399/**
400 * platform_driver_register
401 * @drv: platform driver structure
402 */
403int platform_driver_register(struct platform_driver *drv)
404{
405 drv->driver.bus = &platform_bus_type;
406 if (drv->probe)
407 drv->driver.probe = platform_drv_probe;
408 if (drv->remove)
409 drv->driver.remove = platform_drv_remove;
410 if (drv->shutdown)
411 drv->driver.shutdown = platform_drv_shutdown;
412 if (drv->suspend)
413 drv->driver.suspend = platform_drv_suspend;
414 if (drv->resume)
415 drv->driver.resume = platform_drv_resume;
416 return driver_register(&drv->driver);
417}
418EXPORT_SYMBOL_GPL(platform_driver_register);
419
420/**
421 * platform_driver_unregister
422 * @drv: platform driver structure
423 */
424void platform_driver_unregister(struct platform_driver *drv)
425{
426 driver_unregister(&drv->driver);
427}
428EXPORT_SYMBOL_GPL(platform_driver_unregister);
429
357 430
358/** 431/**
359 * platform_match - bind platform device to platform driver. 432 * platform_match - bind platform device to platform driver.