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staging: comedi: comedi_pcmcia: introduce comedi_pcmcia_{enable, disable}

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Introduce some helper functions to enable/disable the PCMCIA device.
This will allow removing some of the boilerplate code in the comedi
PCMCIA drivers.

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>
This commit is contained in:
H Hartley Sweeten 2013-02-04 14:19:35 -07:00 committed by Greg Kroah-Hartman
parent e44adfdb67
commit ddb2d0a018
2 changed files with 49 additions and 0 deletions
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46
drivers/staging/comedi/comedi_pcmcia.c
View file

@ -37,6 +37,52 @@ struct pcmcia_device *comedi_to_pcmcia_dev(struct comedi_device *dev)
}
EXPORT_SYMBOL_GPL(comedi_to_pcmcia_dev);
static int comedi_pcmcia_conf_check(struct pcmcia_device *link,
void *priv_data)
{
if (link->config_index == 0)
return -EINVAL;
return pcmcia_request_io(link);
}
/**
* comedi_pcmcia_enable() - Request the regions and enable the PCMCIA device.
* @dev: comedi_device struct
*
* The comedi PCMCIA driver needs to set the link->config_flags, as
* appropriate for that driver, before calling this function in order
* to allow pcmcia_loop_config() to do its internal autoconfiguration.
*/
int comedi_pcmcia_enable(struct comedi_device *dev)
{
struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
int ret;
if (!link)
return -ENODEV;
ret = pcmcia_loop_config(link, comedi_pcmcia_conf_check, NULL);
if (ret)
return ret;
return pcmcia_enable_device(link);
}
EXPORT_SYMBOL_GPL(comedi_pcmcia_enable);
/**
* comedi_pcmcia_disable() - Disable the PCMCIA device and release the regions.
* @dev: comedi_device struct
*/
void comedi_pcmcia_disable(struct comedi_device *dev)
{
struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
if (link)
pcmcia_disable_device(link);
}
EXPORT_SYMBOL_GPL(comedi_pcmcia_disable);
/**
* comedi_pcmcia_auto_config() - Configure/probe a comedi PCMCIA driver.
* @link: pcmcia_device struct

3
drivers/staging/comedi/comedidev.h
View file

@ -440,6 +440,9 @@ struct pcmcia_device;
struct pcmcia_device *comedi_to_pcmcia_dev(struct comedi_device *);
int comedi_pcmcia_enable(struct comedi_device *);
void comedi_pcmcia_disable(struct comedi_device *);
int comedi_pcmcia_auto_config(struct pcmcia_device *, struct comedi_driver *);
void comedi_pcmcia_auto_unconfig(struct pcmcia_device *);