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authorBjorn Helgaas <bjorn.helgaas@hp.com>2008-04-28 16:34:33 -0600
committerLen Brown <len.brown@intel.com>2008-04-29 03:22:28 -0400
commita50b6d7b8d7e1a8b13bd1be65a865b115e1190d9 (patch)
tree3569de9f037726f97a59a98590ec4620c9e2ca09 /drivers/pnp/resource.c
parent21855d69d1e3ace3efdb8159a4a7ab1ab98a6f19 (diff)
downloadlwn-a50b6d7b8d7e1a8b13bd1be65a865b115e1190d9.tar.gz
lwn-a50b6d7b8d7e1a8b13bd1be65a865b115e1190d9.zip
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>
Diffstat (limited to 'drivers/pnp/resource.c')
-rw-r--r--drivers/pnp/resource.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c
index c57cfe51d52a..1f4134eea7b7 100644
--- a/drivers/pnp/resource.c
+++ b/drivers/pnp/resource.c
@@ -538,6 +538,44 @@ struct resource *pnp_get_resource(struct pnp_dev *dev,
}
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] .... */
static int __init pnp_setup_reserve_irq(char *str)
{