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PNP: add pnp_get_resource() interface

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This adds a pnp_get_resource() that works the same way as
platform_get_resource().  This will enable us to consolidate
many pnp_resource_table references in one place, which will
make it easier to make the table dynamic.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bjorn Helgaas 2008-04-28 16:34:14 -06:00 committed by Len Brown
parent d948a8daa0
commit b90eca0a61
2 changed files with 28 additions and 0 deletions
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27
drivers/pnp/resource.c
View File

@ -487,6 +487,33 @@ int pnp_check_dma(struct pnp_dev *dev, int idx)
#endif
}
struct resource *pnp_get_resource(struct pnp_dev *dev,
unsigned int type, unsigned int num)
{
struct pnp_resource_table *res = &dev->res;
switch (type) {
case IORESOURCE_IO:
if (num >= PNP_MAX_PORT)
return NULL;
return &res->port_resource[num];
case IORESOURCE_MEM:
if (num >= PNP_MAX_MEM)
return NULL;
return &res->mem_resource[num];
case IORESOURCE_IRQ:
if (num >= PNP_MAX_IRQ)
return NULL;
return &res->irq_resource[num];
case IORESOURCE_DMA:
if (num >= PNP_MAX_DMA)
return NULL;
return &res->dma_resource[num];
}
return NULL;
}
EXPORT_SYMBOL(pnp_get_resource);
/* format is: pnp_reserve_irq=irq1[,irq2] .... */
static int __init pnp_setup_reserve_irq(char *str)
{

1
include/linux/pnp.h
View File

@ -25,6 +25,7 @@ struct pnp_dev;
/*
* Resource Management
*/
struct resource *pnp_get_resource(struct pnp_dev *, unsigned int, unsigned int);
/* Use these instead of directly reading pnp_dev to get resource information */
#define pnp_port_start(dev,bar) ((dev)->res.port_resource[(bar)].start)