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PNP: add pnp_new_resource() to find a new unset pnp_resource 

This encapsulates the code to locate a new pnp_resource of the
desired type.  Currently this uses the pnp_resource_table, but
it will soon change to find a resource in a linked list.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bjorn Helgaas 2008-04-28 16:34:33 -06:00 committed by Len Brown
parent 21855d69d1
commit a50b6d7b8d
1 changed files with 38 additions and 0 deletions
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38
drivers/pnp/resource.c
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@ -538,6 +538,44 @@ struct resource *pnp_get_resource(struct pnp_dev *dev,
} }
EXPORT_SYMBOL(pnp_get_resource); EXPORT_SYMBOL(pnp_get_resource);
static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev, int type)
{
struct pnp_resource *pnp_res;
int i;
switch (type) {
case IORESOURCE_IO:
for (i = 0; i < PNP_MAX_PORT; i++) {
pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IO, i);
if (pnp_res && !pnp_resource_valid(&pnp_res->res))
return pnp_res;
}
break;
case IORESOURCE_MEM:
for (i = 0; i < PNP_MAX_MEM; i++) {
pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_MEM, i);
if (pnp_res && !pnp_resource_valid(&pnp_res->res))
return pnp_res;
}
break;
case IORESOURCE_IRQ:
for (i = 0; i < PNP_MAX_IRQ; i++) {
pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IRQ, i);
if (pnp_res && !pnp_resource_valid(&pnp_res->res))
return pnp_res;
}
break;
case IORESOURCE_DMA:
for (i = 0; i < PNP_MAX_DMA; i++) {
pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_DMA, i);
if (pnp_res && !pnp_resource_valid(&pnp_res->res))
return pnp_res;
}
break;
}
return NULL;
}
/* format is: pnp_reserve_irq=irq1[,irq2] .... */ /* format is: pnp_reserve_irq=irq1[,irq2] .... */
static int __init pnp_setup_reserve_irq(char *str) static int __init pnp_setup_reserve_irq(char *str)
{ {