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| author | H Hartley Sweeten <hartleys@visionengravers.com> | 2012-05-16 18:18:52 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-05-16 19:19:06 -0700 |
| commit | 64255031bde68bd0f7ec934b83842619d513cf91 (patch) | |
| tree | 9a217b39afe078045ff0740a2b2b4502e4d056fc /drivers/staging/comedi/comedidev.h | |
| parent | d896e0e4f45e925b2bf9a800ca85e613d68e2888 (diff) | |
| download | linux-64255031bde68bd0f7ec934b83842619d513cf91.tar.bz2 | |
staging: comedi: Add helper macro for comedi usb driver boilerplate
Introduce the module_comedi_usb_driver macro, and the
associated register/unregister functions, which is a
convenience macro for comedi usb driver modules similar
to module_platform_driver. It is intended to be used by
drivers where the init/exit section does nothing but
register/unregister the comedi driver and associated usb
driver. By using this macro it is possible to eliminate
a few lines of boilerplate code per comedi usb driver.
Also, when registering the usb driver check for failure
and unregister the comedi driver.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/comedi/comedidev.h')
| -rw-r--r-- | drivers/staging/comedi/comedidev.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h index 92a119960a2c..f7f023cb95c1 100644 --- a/drivers/staging/comedi/comedidev.h +++ b/drivers/staging/comedi/comedidev.h @@ -329,6 +329,25 @@ void comedi_pci_driver_unregister(struct comedi_driver *, struct pci_driver *); module_driver(__comedi_driver, comedi_pci_driver_register, \ comedi_pci_driver_unregister, &(__pci_driver)) +struct usb_driver; + +int comedi_usb_driver_register(struct comedi_driver *, struct usb_driver *); +void comedi_usb_driver_unregister(struct comedi_driver *, struct usb_driver *); + +/** + * module_comedi_usb_driver() - Helper macro for registering a comedi USB driver + * @__comedi_driver: comedi_driver struct + * @__usb_driver: usb_driver struct + * + * Helper macro for comedi USB drivers which do not do anything special + * in module init/exit. This eliminates a lot of boilerplate. Each + * module may only use this macro once, and calling it replaces + * module_init() and module_exit() + */ +#define module_comedi_usb_driver(__comedi_driver, __usb_driver) \ + module_driver(__comedi_driver, comedi_usb_driver_register, \ + comedi_usb_driver_unregister, &(__usb_driver)) + void init_polling(void); void cleanup_polling(void); void start_polling(struct comedi_device *); |