diff options
author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2013-01-30 22:22:44 (GMT) |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-31 09:38:10 (GMT) |
commit | 309231d7a610554b02084ff7b465e43ef383a3bc (patch) | |
tree | b878efbc3fd1cd16a6ecea26e1b8d4867ee2ef6f /drivers/staging/comedi/comedi_pcmcia.c | |
parent | 33782dd5edf8db3cdb7c81a3523bf743dd0209b7 (diff) | |
download | linux-fsl-qoriq-309231d7a610554b02084ff7b465e43ef383a3bc.tar.xz |
staging: comedi: conditionally build in PCMCIA driver support
Separate the comedi_pcmcia_* functions out of drivers.c into a new
source file, comedi_pcmcia.c. This allows conditionally building
support for comedi pcmcia drivers into the comedi core without the
need for the #if'defery. Fix the Kconfig and Makefile appropriately.
Group all the comedi_pcmcia_* prototypes into one place in comedidev.h.
Protect these prototypes with an #ifdef so that building a comedi
pcmcia driver without PCMCIA support will cause a build error. This
will normally not happen as long as the comedi pcmcia driver is placed
in the proper group in the Kconfig.
Remove the #include <pcmcia/*.h> from drivers.c. These includes are only
needed by the comedi pcmcia driver support code and the pcmcia drivers.
The include should occur in those files.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/comedi/comedi_pcmcia.c')
-rw-r--r-- | drivers/staging/comedi/comedi_pcmcia.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/drivers/staging/comedi/comedi_pcmcia.c b/drivers/staging/comedi/comedi_pcmcia.c new file mode 100644 index 0000000..8522945 --- /dev/null +++ b/drivers/staging/comedi/comedi_pcmcia.c @@ -0,0 +1,73 @@ +/* + * comedi_pcmcia.c + * Comedi PCMCIA driver specific functions. + * + * COMEDI - Linux Control and Measurement Device Interface + * Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/kernel.h> + +#include <pcmcia/cistpl.h> +#include <pcmcia/ds.h> + +#include "comedidev.h" + +/** + * comedi_pcmcia_driver_register() - Register a comedi PCMCIA driver. + * @comedi_driver: comedi_driver struct + * @pcmcia_driver: pcmcia_driver struct + * + * This function is used for the module_init() of comedi USB drivers. + * Do not call it directly, use the module_comedi_pcmcia_driver() helper + * macro instead. + */ +int comedi_pcmcia_driver_register(struct comedi_driver *comedi_driver, + struct pcmcia_driver *pcmcia_driver) +{ + int ret; + + ret = comedi_driver_register(comedi_driver); + if (ret < 0) + return ret; + + ret = pcmcia_register_driver(pcmcia_driver); + if (ret < 0) { + comedi_driver_unregister(comedi_driver); + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(comedi_pcmcia_driver_register); + +/** + * comedi_pcmcia_driver_unregister() - Unregister a comedi PCMCIA driver. + * @comedi_driver: comedi_driver struct + * @pcmcia_driver: pcmcia_driver struct + * + * This function is used for the module_exit() of comedi PCMCIA drivers. + * Do not call it directly, use the module_comedi_pcmcia_driver() helper + * macro instead. + */ +void comedi_pcmcia_driver_unregister(struct comedi_driver *comedi_driver, + struct pcmcia_driver *pcmcia_driver) +{ + pcmcia_unregister_driver(pcmcia_driver); + comedi_driver_unregister(comedi_driver); +} +EXPORT_SYMBOL_GPL(comedi_pcmcia_driver_unregister); |