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mcb: introduce mcb_get_resource()

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Introduce mcb_get_resource() as a common accessor to a mcb device's memory or
IRQ resources.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johannes Thumshirn 2017-08-02 09:58:52 +02:00 committed by Greg Kroah-Hartman
parent 5aabd3b007
commit 2ce8008711
2 changed files with 21 additions and 1 deletions
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20
drivers/mcb/mcb-core.c
View File

@ -417,6 +417,22 @@ void mcb_bus_add_devices(const struct mcb_bus *bus)
} }
EXPORT_SYMBOL_GPL(mcb_bus_add_devices); EXPORT_SYMBOL_GPL(mcb_bus_add_devices);
/**
* mcb_get_resource() - get a resource for a mcb device
* @dev: the mcb device
* @type: the type of resource
*/
struct resource *mcb_get_resource(struct mcb_device *dev, unsigned int type)
{
if (type == IORESOURCE_MEM)
return &dev->mem;
else if (type == IORESOURCE_IRQ)
return &dev->irq;
else
return NULL;
}
EXPORT_SYMBOL_GPL(mcb_get_resource);
/** /**
* mcb_request_mem() - Request memory * mcb_request_mem() - Request memory
* @dev: The @mcb_device the memory is for * @dev: The @mcb_device the memory is for
@ -460,7 +476,9 @@ EXPORT_SYMBOL_GPL(mcb_release_mem);
static int __mcb_get_irq(struct mcb_device *dev) static int __mcb_get_irq(struct mcb_device *dev)
{ {
struct resource *irq = &dev->irq; struct resource *irq;
irq = mcb_get_resource(dev, IORESOURCE_IRQ);
return irq->start; return irq->start;
} }

2
include/linux/mcb.h
View File

@ -136,5 +136,7 @@ extern struct resource *mcb_request_mem(struct mcb_device *dev,
const char *name); const char *name);
extern void mcb_release_mem(struct resource *mem); extern void mcb_release_mem(struct resource *mem);
extern int mcb_get_irq(struct mcb_device *dev); extern int mcb_get_irq(struct mcb_device *dev);
extern struct resource *mcb_get_resource(struct mcb_device *dev,
unsigned int type);
#endif /* _LINUX_MCB_H */ #endif /* _LINUX_MCB_H */