diff options
| author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2014-08-12 11:41:28 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-08-16 12:23:26 -0700 |
| commit | 5c19084bbd4ef7c0a10e5b01145b940edf872a63 (patch) | |
| tree | 846edb1456a00e9a471e29370f63bdee79bff1dc /drivers/staging/comedi/drivers/8255.h | |
| parent | 9067983867516a425d3382cb2eeeb234a2e8e3b6 (diff) | |
staging: comedi: 8255: handle memory mapped io
The drivers that use this module with memory mapped io all have the
ioremap'ed base address stored in the comedi_device 'mmio' member.
Introduce a default (*io) function that does 8-bit memory mapped io.
Modify subdev_8255_init() so that it takes a flag parameter indicating
if the io is port or memory mapped. Make the function static and rename
it to __subdev_8255_init().
Introduce two exported wrappers for __subdev_8255_init():
subdev_8255_init() - for drivers that do 8-bit port io
subdev_8255_mm_init() - for drivers that do 8-bit memory mapped io
Use subdev_8255_mm_init() in the drivers that do 8-bit memory mapped io
and remove the private (*io) functions.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/comedi/drivers/8255.h')
| -rw-r--r-- | drivers/staging/comedi/drivers/8255.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/staging/comedi/drivers/8255.h b/drivers/staging/comedi/drivers/8255.h index 30848977d421..c7c6deeed026 100644 --- a/drivers/staging/comedi/drivers/8255.h +++ b/drivers/staging/comedi/drivers/8255.h @@ -21,9 +21,14 @@ #include "../comedidev.h" -int subdev_8255_init(struct comedi_device *dev, struct comedi_subdevice *s, +int subdev_8255_init(struct comedi_device *, struct comedi_subdevice *, int (*io)(struct comedi_device *, int, int, int, unsigned long), unsigned long regbase); +int subdev_8255_mm_init(struct comedi_device *, struct comedi_subdevice *, + int (*io)(struct comedi_device *, + int, int, int, unsigned long), + unsigned long regbase); + #endif |