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| author | Bjorn Helgaas <bjorn.helgaas@hp.com> | 2008-04-28 16:34:33 -0600 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-04-29 03:22:28 -0400 |
| commit | a50b6d7b8d7e1a8b13bd1be65a865b115e1190d9 (patch) | |
| tree | 3569de9f037726f97a59a98590ec4620c9e2ca09 /drivers/pnp/resource.c | |
| parent | 21855d69d1e3ace3efdb8159a4a7ab1ab98a6f19 (diff) | |
| download | lwn-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.c | 38 |
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) { |